32results about How to "Convenient test work" patented technology

The invention relates to an online non-destructive testing method which is suitable for automatically measuring and recording the total grain number, the filled grain number, the maturing rate, the grain lengths, the grain widths and the length-width ratio of a single plant or single-batch paddy rice in the paddy rice seed testing process for agricultural scientific research personnel. The digitalized paddy rice seed testing machine mainly comprises six functional modules of a bar code recognizer, a grain transfer device, an air separation device, an image acquisition device, a PLC (Programmable Logic Controller) and a computer system. The digitalized paddy rice seed testing machine can be used for separating filled grains and empty and shriveled grains by utilizing the air separation device, dynamically acquiring grain parameters by utilizing a machine vision technology and simultaneously measuring the total grain number and the filled grain number of the paddy rice, thereby overcoming a bottleneck that the traditional testing measure can not simultaneously acquire the total grain number and the filled grain number and realizing the detection to the grain-size parameters of the paddy rice at the same time of calculating the paddy rice grain number. The invention can be also widely applied to the seed testing work of other grain crops.

The invention relates to a high-speed train-tunnel aerodynamic characteristic movable model experiment system which comprises an air cannon launching device (6), a train model (1), a tunnel model (2) and a guide rail (3) in the tunnel model (2); the section of the cannon tube (4) of the air cannon launching device (6) is in the shape of a gate arch, the shape of the bottom (3') thereof is the same with the shape of the guide rail (3) in the tunnel model (2), and the bottom (3') and the guide rail (3) in the tunnel model (2) are connected into an integrated structure; and the section of the guide rail (3) is in an I-shaped structure, the middle at the bottom of the train model (1) is matched with the I-shaped structure of the guide rail (3), and the train model (1) is embedded on the guide rail (3) in a sliding mode. Through the system, the train model stably runs on the guide rail, the train model has large size and is more approximate to the real state of train running, and the aerodynamic characteristic of a train running in a tunnel can be better simulated and researched.

The invention discloses a city tunnel ventilation test device and a manufacturing method thereof. The manufacturing method comprises the following steps: (1) determining the geometric scale(lambda 1 is more than 10 and less than 22) of a model tunnel and an actual model; (2) making a plurality of sections according to the geometric shape of the actual tunnel and splicing the sections into the model tunnel, wherein one wall surface of the model tunnel is made from a transparent material and the other inner wall surfaces of the model tunnel are mounted with abrasive paper; (3) mounting a jet nozzle, a back pressure pipe and a tracer gas tracking mechanism in the predetermined positions of the model tunnel. According to the manufacturing method, the ratio of the model tunnel to the actual tunnel is (1 to 22) to (1 to 10); in the ratio range, on one hand, the flowing of air in the model tunnel can satisfythe properties of a self-model region, and the model tunnel and the actual tunnel are similar in geometricproperty and flowing resistance, so that the model tunnel can accurately simulate the movement of ventilation air flow and a pollutant dispersion law in the actual tunnel; on the other hand, the test cost is relatively low, so that the test operation can beconveniently carried out.

The invention discloses an experimental device and an experimental method for simulating an anti-floating anchor-concrete plate composite structure. The experimental device comprises a load bearing device, wherein the load bearing device comprises a skeleton; the upper end of the skeleton is provided with an upper supporting plate which can move upwards relative to the skeleton; the lower end of the inner part of the skeleton is provided with a lower supporting plate which can move up and down relative to the skeleton; a force transfer device for transferring load and a force application device which is used for applying the load are arranged between the upper supporting plate and the lower supporting plate; the load bearing device is also provided with a testing device. According to the experimental device and the experimental method for simulating the anti-floating anchor-concrete plate composite structure, disclosed by the invention, design parameters of plane layout of different anchor rods, geometric parameters of a concrete plate, material strength and the like can be verified, so that optimal cooperative work of the anti-floating anchor-concrete plate composite structure can be achieved; load applying and counter force providing of the experimental device have the characteristic of self-balance system, so that an additional counter force balancing device does not need to be additionally arranged, and the anchor rod uplifting displacement and the concrete plate vertical displacement existing in the cooperative work when the anti-floating anchor-concrete plate composite structure plays an anti-floating role can be simulated; an assembling form is adopted, so that convenience is provided for the work of manufacturing, transporting, assembling and testing.

The invention provides a quick corresponding parallel system between electric networks and a relative application method, which relates to a rectifying-investing system formed by high voltage electric power electric appliances, and can quickly connect two electric networks with different frequencies, quickly realize load support from the circle electric network to the low circle electric network, and eliminate the system vibration to prevent accident expansion. Following the load transmission, after satisfying the conditions of corresponding parallel, the two networks automatically complete the corresponding parallel, and exit the quick parallel system; besides, the same method also can quickly achieve ring network parallel operation for the line. Being safe and reliable, the invention has advantages of quick parallel speed and high automatization level, thereby radically solving the situation of manual operation in the prior electric network parallel; moreover, the parallel system is further applicable to the test of rising current and rising voltage for the line.

The invention provides a releasing device for an underwater beacon used for dynamic positioning system sea trial. The releasing device for the underwater beacon used for the dynamic positioning system sea trial comprises the underwater beacon, a first connecting piece, a second connecting piece, a buoy, a first pressed iron and at least two second pressed irons, the first pressed iron is connected with the bottom of the underwater beacon, the two ends of the first connecting piece are correspondingly connected with the first pressed iron and the second connecting piece, the buoy is connected with the second connecting piece, and all the second pressed irons are connected with the first connecting piece correspondingly. According to the releasing device for the underwater beacon used for the dynamic positioning system sea trial, the structure is simple, using is convenient, position of the underwater beacon in the seafloor can be determined according to the method for water surface buoy positioning, the length of ropes needed to be released is determined according to boat length, boat width, water depth for the trial and area of water area for the trial, the method for manually releasing and refloating the underwater beacon is set, and safety of the whole trial process is guaranteed. The releasing method for the releasing device is simple in operating process, reliable in principle, and high in safety.

The invention relates to the electric power testing technology field and especially relates to an auxiliary support used for a testing site. The support comprises a triangle support, a tray, a top cover, an alarm lamp and a stand column. The tray is hinged to a top end of the triangle support. The stand column is detachably installed on the tray. The top cover is detachably installed on a top of the stand column. The tray and the top cover are connected through the stand column. The alarm lamp is detachably installed on a top of the top cover or a top of the tray. In the invention, a hygrothermograph is placed correctly, an electric power testing site demand is satisfied, and testing normalization and efficiency are effectively increased.

The invention provides a detection and absorption device for SF6. SF6 enters a closed tank of a mineral oil content measuring unit and filtered by a filter membrane, and a product is discharged into an SF6 acidic material absorption unit; a motor controls an injector to inject a CCl4 solution into the closed tank, CCl4 mist spray is formed by a first atomizer, mineral oil in the filter membrane is eluted, an eluent is discharged into a detection tank, elution is stopped when content change of the mineral oil in the eluent tends to be stable, and a liquid in the detection tank is subjected to volume fixing with the CCl4 solution; after the volume fixing is finished, detection work is completed with an infrared light source and an infrared detector; for SF6 discharged from the closed tank, SF6 acidic materials make sufficient contact with an NaOH solution and are absorbed completely by aid of an NaOH solution circulating module and a gas circulating module assisted by a second atomizer and a gas spray nozzle. The detection and absorption device can measure the content of the mineral oil in SF6 accurately and sufficiently absorb the acidic materials in SF6 and is excellent in working performance.

The invention provides a detecting and absorbing device applied to sulfur hexafluoride gas. The detecting and absorbing device is characterized in that a filter membrane arranged in a sealed tank body is a glass fiber membrane, an injector is connected with a common opening of a multi-way valve, a first branch opening of the multi-way valve is communicated with an atomizer arranged in the sealed tank body through a liquid outlet pipe, a second branch opening of the multi-way valve is connected with the bottom of a detection tank, and a third branch opening of the multi-way valve is a carbon tetrachloride liquid inlet; a liquid level control switch is arranged on a lateral wall of the upper end of the detection tank, an infrared light source and an infrared detector are oppositely arranged on the two sides of the detection tank respectively, and the top end of the detection tank is communicated with the bottom close to an air inlet of one side of the sealed tank body; the upper end of an absorbing tank is communicated with an air exhausting pipeline, a middle lower part of the absorbing tank is communicated with an air outlet of the sealed tank body through an air inlet pipe provided with an ejector and an electromagnetic valve, the outer input end of the ejector is communicated with the bottom of the absorbing tank through a liquid circulating pump, and an inlet of a six-way valve is connected with an injection pump; the buffer tank is in serial connection with an air circulating pump to be communicated with the air exhausting pipeline and the air inlet pipeline respectively, and a fluorine ion sensor is arranged at the lower end in the absorbing tank.

A subway vehicle display screen concentrated on-off control circuit is characterized in that a main breaker, a self-locking button, a cab activation relay normally open contact and a display screen turn-off relay are connected in series orderly to form a display screen control main loop, a display screen control contactor of each section of carriage is in series connection with the normally closed contact of the display screen turn-off relay via a line and then is connected with the main breaker to form a display screen control sub-loop of each section of carriage; and the display screen control contactor of each section of carriage has two pairs of normally open contacts which are in series connection between a left breaker and a left side display screen, and between a right breaker and a right side display screen respectively. By pressing down the self-locking button in an activation cab, the concentrated turn-on and turn-off of the liquid crystal display screens of the whole train can be realized. The subway vehicle display screen concentrated on-off control circuit of the present invention is ingenious in design, is safe and reliable to control and convenient to operate, and brings conveniences to the overhauling or test work.

The invention puts forward a lightning arrester capable of being dismounted on a live line. The lightning arrester comprises a silicone rubber insulator support rack which comprises a silicone rubber insulator; an upper end and a lower end of the silicone rubber insulator are respectively provided with a first support cross bar and a second support cross bar that are made of metal material and arranged perpendicular to a length direction of the silicone rubber insulator; an upper part of one end, connected with the silicone rubber insulator, of the first support cross bar is provided with a first fixing screw bolt; a lower part of one end, connected with the silicone rubber insulator, of the second support cross bar is provided with a second fixing screw bolt; the other end of the first support cross bar and the other end of the second support cross bar are provided with grooves that are respectively a first groove and a second groove; elastic cards are respectively connected in the first groove and the second groove, and the elastic cards are respectively connected with two ends of the lightning arrester in a clamped manner. The lightning arrester capable of being dismounted on the live line can be mounted and dismounted on the live line, and the lightning arrester is enabled to be convenient to test and change.

The invention provides a device for absorbing acidic materials in sulfur hexafluoride gas. The device comprises an absorption tank, an air inlet pipeline, an air discharging pipeline, a liquid inlet pipeline and a waste liquid discharging pipeline. The device is characterized in that a six-way valve, a titration tank and a buffer tank are additionally arranged, wherein a liquid-level sensor and a pH electrode are arranged in the titration tank, and the top of the titration tank is communicated with the bottom of the absorption tank; a gas circulating pump is arranged outside the air inlet pipeline close to the absorption tank, and a gas spray head is arranged at the tail end of the lower end, stretching into the absorption tank, of the air inlet pipeline; an atomization spray head is arranged at the top end in the absorption tank, a liquid inlet end of the atomization spray head is communicated to the bottom of the titration tank and a NaOH solution discharging hole of the six-way valve, respectively through the liquid inlet pipeline provided with a liquid circulating pump and an electromagnetic valve, an inlet of the six-way valve is connected with an outlet of an injection pump, and the NaOH solution discharging hole and a liquid discharging hole are respectively formed in the six-way valve; and air inlet and outlet ends of the buffer tank are respectively communicated with the air discharging pipeline and the liquid inlet pipeline. According to the device, the acidic materials can be adequately absorbed, the real-time monitoring and control can be realized, and the working performance is excellent.

The invention provides an absorbing device for hydrolyzable fluoride in SF6. The absorbing device comprises an absorption cell, a gas inlet pipe, a gas outlet pipe, a liquid inlet pipe and a waste liquid outlet pipe, wherein the upper end of the absorption cell is communicated with the gas outlet pipe, and the middle of the absorption cell is communicated with the gas inlet pipe. The absorbing device is characterized in that a six-way valve, a buffer tank, a gas circulating pump, a liquid circulating pump, a fluoride ion sensor and a jet aerator are added, wherein the input end of the jet aerator is communicated with a gas outlet end of the gas inlet pipe and the output end of the liquid circulating pump; the output end of the jet aerator is communicated with the absorption cell; the inlet of the six-way valve is connected with the outlet of an injection pump; an NaOH solution inlet and a drain port are further formed in the six-way valve; the input end of the liquid circulating pump is communicated with the bottom of the absorption cell through a solenoid valve; the gas inlet end of the gas circulating pump and the gas outlet end of the buffer tank are communicated with the gas outlet pipe and the gas inlet pipe correspondingly after the buffer tank and the gas circulating pump are connected in series; the fluoride ion sensor is mounted at the lower end in the absorption cell. The absorbing device can absorb fluoride sufficiently and rapidly and has excellent working performance.

The invention relates to a device for simulating load capacity of a door lock during the closing of a sliding door of an automobile. The invention is characterized in that the device comprises a base plate, fixed installing plates and a door lock installing plate, wherein the fixed installing plates are vertically arranged on the base plate at intervals and are provided with a transverse linear guide rail and a power source which drives a load installing plate to move along the linear guide rail; a transverse guide rail is fixed on the load installing plate; a sliding block is arranged on theguide rail; a load spring is connected between the load installing plate and the sliding block; a lock column installing plate is also fixed at the outer side of the sliding block; a lock column is arranged on the lock column installing plate; and the door lock corresponding to the lock column is arranged on the door lock installing plate. With the adoption of the simulating device, as the durability test of the door lock can be transferred from an automobile body to a laboratory table, the cost is saved, the test steps are simplified, and the period of product development is shortened.

The display screen of the subway vehicle is centralized on-off control circuit, and its main circuit breaker, self-locking button, normally open contact of the driver's cab activation relay, and display screen shut-off relay are connected in series to form the main circuit of the display screen control; the display screen of each car controls the contact The circuit breaker is connected in series with the normally closed contact of the display shut-off relay through the line, and then connected to the main circuit breaker to form the display control sub-circuit of each vehicle; the display control contactor of each vehicle has two pairs of normally open contacts, They are respectively connected in series between the left circuit breaker and the left display screen, and between the right circuit breaker and the right display screen. By pressing the self-locking button in the activated cab, the LCD screen of the entire train can be closed and opened centrally. The control circuit of the invention has ingenious design, safe and reliable control, and convenient operation, which brings convenience to maintenance or test work.

The invention discloses an experimental device and an experimental method for simulating an anti-floating anchor-concrete plate composite structure. The experimental device comprises a load bearing device, wherein the load bearing device comprises a skeleton; the upper end of the skeleton is provided with an upper supporting plate which can move upwards relative to the skeleton; the lower end of the inner part of the skeleton is provided with a lower supporting plate which can move up and down relative to the skeleton; a force transfer device for transferring load and a force application device which is used for applying the load are arranged between the upper supporting plate and the lower supporting plate; the load bearing device is also provided with a testing device. According to the experimental device and the experimental method for simulating the anti-floating anchor-concrete plate composite structure, disclosed by the invention, design parameters of plane layout of different anchor rods, geometric parameters of a concrete plate, material strength and the like can be verified, so that optimal cooperative work of the anti-floating anchor-concrete plate composite structure can be achieved; load applying and counter force providing of the experimental device have the characteristic of self-balance system, so that an additional counter force balancing device does not need to be additionally arranged, and the anchor rod uplifting displacement and the concrete plate vertical displacement existing in the cooperative work when the anti-floating anchor-concrete plate composite structure plays an anti-floating role can be simulated; an assembling form is adopted, so that convenience is provided for the work of manufacturing, transporting, assembling and testing.

The invention relates to an online non-destructive testing method which is suitable for automatically measuring and recording the total grain number, the filled grain number, the maturing rate, the grain lengths, the grain widths and the length-width ratio of a single plant or single-batch paddy rice in the paddy rice seed testing process for agricultural scientific research personnel. The digitalized paddy rice seed testing machine mainly comprises six functional modules of a bar code recognizer, a grain transfer device, an air separation device, an image acquisition device, a PLC (Programmable Logic Controller) and a computer system. The digitalized paddy rice seed testing machine can be used for separating filled grains and empty and shriveled grains by utilizing the air separation device, dynamically acquiring grain parameters by utilizing a machine vision technology and simultaneously measuring the total grain number and the filled grain number of the paddy rice, thereby overcoming a bottleneck that the traditional testing measure can not simultaneously acquire the total grain number and the filled grain number and realizing the detection to the grain-size parameters of the paddy rice at the same time of calculating the paddy rice grain number. The invention can be also widely applied to the seed testing work of other grain crops.

The invention relates to a binding post connecting structure for a stainless steel composite material grounding lead-up wire. The binding post connecting structure comprises a lead-up wire and a binding post, wherein the binding post consists of a steel rectangular plate arranged at the upper part and a steel cylinder arranged at the lower part, a center hole is formed in the bottom surface of the steel cylinder, the binding post is sheathed on the lead-up wire through the center hole, external screw threads are arranged on the steel cylinder of the binding post, a screw nut sheathed on the lead-up wire is connected onto the external screw thread part of the steel cylinder of the binding post through screw threads, the lower part of an inner hole of the screw nut has the conical degree, and three grasping claws are arranged between the screw nut and the lead-up wire. The binding post connecting structure has the advantages that the screw nut is used for fixing the lead-up wire and the binding post, the connection can be realized through adopting a general and ordinary tool, the requirement on a construction tool can be reduced, because the threaded connection is adopted, the mounting and the dismounting are convenient, the installation direction of the binding post can be freely changed, the fast and convenient connection with external electric equipment grounding bars in any directions can be realized, in addition, the test work is convenient, and because the three grasping claws are arranged in the screw nut, the connection reliability can be ensured.

The invention provides a method and device for testing hydrolyzable fluorides in sulfur hexafluoride gases. The method comprises the following steps: 1) sufficiently mixing an SF6 gas with a NaOH solution in a jet device; 2) feeding a gas-liquid mixed liquid into an absorption tank, performing gas-liquid circulation, feeding into the absorption tank through the jet device, and repeating the operation till a fluorinion electrode measurement value is stable, wherein the potential of a fluorinion electrode is V1 at the moment; 3) repeating steps 1) and 2) to another SF6 gas, wherein the potentialof the fluorinion electrode is V2 at the moment; 4) drawing a fluorinion working curve; 5) according to a standard working curve equation, testing the concentration of hydrolysable fluorides. According to the device, the input end of the jet device is communicated with a gas inlet pipeline and a liquid circulation pump respectively, the output end of the jet device is communicated with an absorption tank, the inlet of a six-way valve is connected with an injection pump, and the input end of the liquid circulation pump is communicated with the bottom of the absorption tank through an electromagnetic valve; after a buffer tank is serially connected with the gas circulation pump, a gas inlet and a gas outlet are correspondingly communicated with an exhaust pipeline and the gas inlet pipeline, and accurate testing and sufficient absorption upon the hydrolyzable fluorides are achieved.

The invention relates to an intelligent sleeve type high-temperature high-pressure magnetic valve, comprising a magnet head, a shielding sleeve and a valve body. A magnet coil and a dynamic iron core are installed in the magnet head, a radiating fin is arranged on the outer portion of the shielding sleeve, a dielectric inlet end and a dielectric outlet end are arranged on the lower portion of thevalve body, and a center dielectric passage is arranged between the inlet end and the outlet end. A valve base cylinder is installed in the valve body, a thread guide body is arranged on the upper end of the valve base cylinder, the bottom of the valve base cylinder is embedded on the valve body, and the lower portion of the valve base cylinder is provided with a valve base center hole which is connected with the center dielectric passage. A flap is mounted in the valve base cylinder, an assistant valve hole is arranged on the lower portion of the flap, the upper end and the lower end of a valve rod are respectively connected with an assistant valve, and a return spring is arranged on the valve rod. The invention has smart and reasonable design. The invention which adopts a kick rigidity micro-resilient seal pair structure can permanently work under the working conditions that the temperature is smaller or equal to 350 DEG C, and the pressure is 0-17.5 MPa, which guarantees the non-leakage and reliable working of the valve, and the valve also can operate reliably without leaking, particularly under the severe conditions of small pressure difference and temperature difference alternation.

Provided is a binding post connection structure of a grounding leading line, including a leading line and a binding post. The binding post is composed of an upper part steel rectangular plate and a lower part steel cylinder. The bottom surface of the steel cylinder is provided with a central hole; the binding post sleeves the leading line through the central hole; the steel cylinder of the binding post is provided with external thread; a nut sleeving the leading line is in threaded connection with the external thread part of the steel cylinder of the binding post; the inner hole lower part of the nut has conicity; a three-jaw grasper is arranged between the nut and the leading line, wherein lower parts of three jaws of the three-jaw grasper have conicity, and the conicity of the three-jaw grasper matches the conicity of the nut. The binding post connection structure can be connected by means of a common tool, thereby reducing requirements for a construction tool; as a result of threaded connection, the binding post connection structure is convenient to assemble and disassemble, and the installation direction of a binding post can be changed randomly, thereby realizing the rapid and convenient installation with an electrical equipment grounding bar in any direction; in addition, the binding post connection structure facilitates test work, and the three-jaw grasper guarantees connection reliability.

The invention discloses a city tunnel ventilation test device and a manufacturing method thereof. The manufacturing method comprises the following steps: (1) determining the geometric scale(lambda 1 is more than 10 and less than 22) of a model tunnel and an actual model; (2) making a plurality of sections according to the geometric shape of the actual tunnel and splicing the sections into the model tunnel, wherein one wall surface of the model tunnel is made from a transparent material and the other inner wall surfaces of the model tunnel are mounted with abrasive paper; (3) mounting a jet nozzle, a back pressure pipe and a tracer gas tracking mechanism in the predetermined positions of the model tunnel. According to the manufacturing method, the ratio of the model tunnel to the actual tunnel is (1 to 22) to (1 to 10); in the ratio range, on one hand, the flowing of air in the model tunnel can satisfythe properties of a self-model region, and the model tunnel and the actual tunnel are similar in geometricproperty and flowing resistance, so that the model tunnel can accurately simulate the movement of ventilation air flow and a pollutant dispersion law in the actual tunnel; on the other hand, the test cost is relatively low, so that the test operation can beconveniently carried out.

The invention belongs to the technical field of conveying tools, and particularly relates to a conveying tool for a withstand voltage test instrument of ultrahigh-voltage electrical equipment. A loading vehicle and a lifting assembly are included, the lifting assembly comprises two upper supporting frames, two lower supporting frames and a lifting device, the two lower supporting frames are symmetrically arranged and fixedly connected through a connecting rod, leveling devices are symmetrically installed at the bottoms of the lower supporting frames, the lower ends of the upper supporting frames are inserted into top end openings of the lower supporting frames, the upper supporting frames and the lower supporting frames are fixed through locking bolts, and the lifting device is installed on the upper supporting frames in a sliding mode. The conveying tool has the advantages of being complete in use function and suitable for special terrains, the lifting device and the loading vehicle are used in cooperation, the carrying function is achieved, meanwhile, the test instrument is supported to be lifted, the problems that an existing conveying tool is limited in use function and difficult to work under the special terrains are solved, and the use requirement of an electric power system is met.

The invention relates to an intelligent high temperature high pressure non-leakage magnetic valve, comprising a shielding sleeve and a valve body. A magnet coil and a dynamic iron core are installed on the upper portion of the shielding sleeve, and a radiating fin is mounted on the outer portion of the shielding sleeve. A dielectric inlet end and a dielectric outlet end are arranged on the lower portion of the valve body, and a middle dielectric passage is arranged between and mutually connected with the inlet end and the outlet end. A cylinder liner is installed in the valve body, a guide body is arranged on the upper end of the cylinder liner, and a center hole on a valve base is mutually connected with the center dielectric passage. A flap is installed in the cylinder liner, and an assistant-valve hole is mounted on the lower portion of the flap. The upper end of a valve rod is attached with the dynamic iron core, and the lower end is attached with an assistant valve, and a return spring is arranged on the valve rod. The invention has smart and reasonable design. The invention which adopts a kick rigidity micro-resilient seal pair structure can permanently work under the working conditions that temperature is smaller or equal to 350 DEG C, and pressure is 0-17.5 MPa, which guarantees the non-leakage and reliable working of the valve, and the valve also can operate reliably without leaking, particularly under the hostile conditions of small pressure difference and temperature difference.

The invention discloses a method for designing multiple functional measurement areas of a large-scale hydroacoustic measurement test ship. Improve the design plan of the measurement area and determine the number, size and location of the measurement wells, test holes and auxiliary test holes; finally carry out the structural design and overall performance calculation to meet the requirements of the design drawings and relevant specifications. Compared with the prior art, the present invention has the advantages and beneficial effects as follows: it solves the technical difficulties related to hoisting, arrangement, installation and testing of many large and small test equipment and test equipment on the underwater acoustic measurement test ship, and effectively improves In order to measure the overall performance of the test vessel. This invention helps to improve the production and scientific research capabilities of my country's underwater acoustic equipment, and is beneficial to the related experiments and research work of many types of important underwater acoustic equipment, and has very huge military and social benefits.

The invention discloses a pressure stabilizing valve for a crankcase for an engine. The valve comprises a hollow cylindrical valve body; an air inlet cavity connected with an outlet of the crankcase for the engine is arranged at one end of the valve body; the other end of the valve body is sealed; an air outlet connected with an oil-gas separator is arranged on the side wall of the valve body; a valve body cavity between the air inlet cavity and the sealed end is an adjusting cavity; and a pressure stabilizing device capable of controlling connection or disconnection of the air inlet cavity and the air outlet is arranged in the adjusting cavity. The valve is reasonable in structure and ensures that pressure of the crankcase for the engine is in a certain optimal and stable range which meets working requirements of an oil-gas separation system, the oil pumping amount of the crankcase for the engine is greatly reduced, and the service life of the engine and the service life of related accessories are guaranteed.

The invention discloses a design method for a multi-functional measuring area of a large-sized underwater acoustic measurement test vessel. The design method comprising the following steps that: the main dimension of the underwater acoustic measurement test vessel and the distance between two sheet bodies can be initially determined; an initial general design scheme can be determined, the design scheme of the measuring area can be perfected, and then the number, the size and the position of measuring wells, test holes and auxiliary test holes can be determined; finally, the structure design and the general performance can be computed, and the requirements of design paper and relative code standard can be met. Compared with the prior art, the method has the advantages and beneficial effects that relative technical difficulties of hanging, placing, installing and testing of many large-sized and small-sized devices to be tested and testing devices in the underwater acoustic measurement test vessel are solved, and the general performance of the underwater acoustic measurement test vessel is effectively improved. According to the method, the improvement of the production and scientific research capacities of underwater sound devices in China is facilitated, the design method is beneficial for relative testing and researching work for multi-sized important underwater sound devices, and the military benefit and the social benefit are great.