31results about How to "Affect the measurement result" patented technology

The invention discloses a method of measuring a distance between ground force bearing points of a plane and a system. The plane is drawn on three weighing platforms, and positions of force applying points on the weighing platforms can be conveniently and accurately measured by adopting a torque balancing principle. The advantage that force borne by four weighing sensors on each weighing platform can be independently outputted is used, the torque balancing principle is adopted, the positions of force applying points on the weighing platforms can be conveniently and accurately measured, distances between ground force bearing points of the plane measured by the method are the positions of ground actual force applying points, the fact that the traditional length measurement tool such as a tape measure is used for measuring the connection line length of plane wheel geometric center points rather than the ground actual applying points of the plane wheels, and thus the plane gravity center measurement result is influenced can be avoided, the method provides accurate distance parameters for calculating the gravity center of the plane, and the calculated plane gravity center data can be ensured to be accurate and reliable.

A roof dynamic state monitor for a comprehensive mechanization filling coal mining goaf is composed of a monitor base, a multi-level telescopic rod and an underframe. The monitor base is composed of a base cylinder, a spring, a transmission cable, a pattern displacement meter and a guide rod, wherein a displacement meter support, a protective port, a spring support and a range limiting plate are arranged in the base cylinder, the pattern displacement meter contains a chip, the base cylinder is fixed on the underframe with screws, the spring is arranged in a clamping groove of the spring support, the pattern displacement meter is arranged in a clamping groove of the displacement meter support, the guide rod is directly connected to the pattern displacement meter, the guide rod and the pattern displacement meter are arranged in the spring in a sleeved mode, and the transmission cable is connected with the chip. The multi-level telescopic rod is composed of a first-level rod body, a second-level rod body and a third-level rod body, wherein the first-level rod body is installed in the base cylinder and is in direct contact with the range limiting plate on the guide rod, the second-level rod body is fixed in an installation groove of the first-level rod body through a fastening bolt, and the third-level rod body and the second-level rod body are fixed through a fixing bolt. The roof dynamic state monitor can directly and accurately monitor the dynamic subsidence of a roof and is ingenious in structure and convenient to use.

The invention discloses an optical fibre sensor detection device for the oxygen content of a fuel tank. The optical fibre sensor detection device comprises an excitation light source, a Y-shaped optical fibre, an optical fibre sensing probe, a detection cell and a detector; an incidence end of the Y-shaped optical fibre is coupled with the excitation light source; a receiving end of the Y-shaped optical fibre is connected with the detector; one end of the optical fibre sensing probe is connected with the Y-shaped optical fibre; the other end of the optical fibre sensing probe is positioned in the detection cell, wherein the detection device also comprises a sample gas pre-treatment unit which can filter oil droplets and hydrocarbons; one end of the sample gas pre-treatment unit is communicated with the detection cell; the other end of the sample gas pre-treatment unit is communicated with the fuel tank. The optical fibre sensor detection device for the oxygen content of the fuel tank is intrinsically safe, can treat a gas which contains the oil droplets and the hydrocarbons in the fuel tank, cannot pollute the sensing probe, and is suitable for measuring the oxygen content under complicated environmental conditions in the fuel tank in real time.

The invention discloses a mechanism for measuring a starting torque and a constant-torque rotary angle. The mechanism comprises a rack. A measuring shaft is arranged on a bottom plate of the rack; thebottom end of the measuring shaft penetrates the bottom plate; and a gear driving head is arranged at the bottom of the measuring shaft. A torque sensor is arranged at the measuring shaft and is arranged above the bottom plate. An angle sensor is arranged at the measuring shaft and is arranged at the top of the measuring shaft. A synchronous belt sleeves the measuring shaft and sleeves a synchronous pulley; a torque limiting mechanism is arranged above the synchronous pulley and is connected with the synchronous pulley; and a drive motor is arranged above the torque limiting mechanism. Compared with the prior art, the mechanism has the following beneficial effects: measurement of two sets of data is completed by one measuring component set of one device, so that the complexity of the device is simplified, the manufacturing cost of the device is reduced, the operation action is reduced, and the stability of the device is improved.

The invention relates to a water-cooled pressure measuring probe applicable to high-enthalpy airflows. The water-cooled pressure measuring probe comprises a casing, a first sealing member, a second sealing member, a first air inlet pipe, a second air inlet pipe, a test hole, a support member and a bottom plate. The casing comprises an outer casing and an inner casing, the outer casing is providedwith a first water inlet and a first water outlet, and a hollow interlayer with a closed rear end is arranged between the outer casing and the inner casing. The hollow interlayer comprises a front region and a rear region, the front region is divided into an upper cavity and a lower cavity by two blocking portions arranged along the length direction of the casing, the upper cavity is communicatedwith the rear region, and a sealing portion is arranged between the lower cavity and the rear region for sealing. The first water inlet is located on the lower side of the lower cavity, and the firstwater outlet is located on the lower side of the rear region. The first sealing member comprises an outer sealing member for sealing the front end of the outer casing and an inner sealing member for sealing the front end of the inner casing, and a front cavity communicated with the upper cavity and the lower cavity is formed between the outer sealing member and the inner sealing member. The water-cooled pressure measuring probe can meet the measurement requirements for the stagnation pressures of ground simulation tests for heat-insulating materials by high-enthalpy devices.

A method for detecting the residual stress of a workpiece is provided. The method comprises 10 steps: confirming a detection portion and formulating a coordinate system, grinding the surface of the detection portion, cleaning the surface of the detection portion, sticking and inspecting the strain gauge, performing strain gauge protection, performing strain gauge connection inspection, measuring and zeroing the initial value of the strain gauge, selecting a calibration sample, cutting the workpiece and reading the strain value, and calculating the strain force. According to the method providedby the present invention, the method for processing the surface of the workpiece, the method for sticking the strain gauge, and the connection requirements for the wire are described in a detailed manner, the environmental factor is considered and the error is reduced.

A method for measuring the content of dissolved elements in molten steel relates to the field of ferrous metallurgy chemical detection, and comprises the following steps: S1, a liquid molten steel sample to be measured is cooled to prepare a solid steel sample; S2, the solid steel sample is placed in an electrolyte for electrochemical corrosion, and the mass change delta msteel of the solid steel sample before and after electrochemical corrosion is measured; s3, non-metallic inclusions in the electrolyte after electrochemical corrosion are removed, and a to-be-detected element solution is obtained; S4, the mass mi of a dissolved element i in the to-be-detected element solution is measured; S5, the mass fraction of the dissolved element i in the liquid molten steel to be detected is obtained. The method utilizes electrochemical corrosion, filtration and other methods, elements in non-metallic inclusions in steel and dissolved elements in the steel are effectively separated, chemical analysis is conducted on the content of the dissolved elements in an electrochemical corrosion solution through ICP, and the measuring method is accurate in precision, the content of the dissolved elements in the steel can be effectively measured.

The invention discloses an automatic width and thickness measuring clamp for wires in the technical field of wire fixing devices, which comprises a worktable. A fixed mounting seat is fixedly connected to the upper surface of one end of the worktable, a plurality of fixed blocks are fixedly mounted on the upper surface of the fixed mounting seat, and through holes are formed in the upper ends of the fixed blocks. First mounting pieces are fixedly mounted on the two sides of the fixed block and correspond to the lower portions of the through holes, first connecting shafts are fixedly connected to the upper ends of the first mounting pieces, movable pressing rings are rotationally connected to the first connecting shafts, clamping blocks are fixedly connected to the upper ends of the sides, away from the through holes, of the movable pressing rings, and clamping grooves are formed in the upper surface of the fixing block; a movable groove is formed in the end, away from the fixed mounting base, of the upper surface of the workbench, a movable mounting base is slidably connected to the movable groove, and a plurality of balls are rotationally connected to the lower portion of the movable mounting base. By means of the device, the wire can be fixed more conveniently and rapidly, the wire can be straightened conveniently, and errors of the measurement result caused by bending of the measurement position are avoided.

The invention provides a relative light intensity distribution measurement system for solar power concentrating light spots, and belongs to the field of performance measurement of solar utilization technologies. The measurement system comprises a light spot display, a water cooling system, a light spot measuring device and an assisting device, wherein the light spot display is arranged at a lightspot focusing position of a solar power concentrating system and used for displaying relative light intensity distribution of the light spots in a diffuse reflection manner; the water cooling system is used for keeping the light spot display to run at low temperature; the light spot measuring device comprises a CCD imaging instrument and a computer, and is used for measuring relative light intensity distribution of the light spots on the light spot display; the assisting device is used for assisting the light spot display and the light spot measuring device in work. With the adoption of the measurement system, the relative light intensity distribution of the solar power concentrating light spots can be accurately measured; the measuring accuracy is high; and valid data support is providedto improve the performances of the solar power concentrating system.

The invention discloses a TOF module for a sweeping robot and the sweeping robot. The TOF module for the sweeping robot comprises a projection module and a receiving module. The projection module is suitable for being installed on a sweeping robot body and used for projecting an output light field, and the ratio of the angle of the output light field in the horizontal direction to the angle of theoutput light field in the vertical direction is greater than 10. The receiving module is suitable for being correspondingly installed on the sweeping robot body and used for receiving the reflected receiving light field, and therefore the TOF principle is applied to conduct distance measurement.

The invention discloses a candy boiling device and belongs to the field of candy boiling. The candy boiling device comprises a lifting cover, wherein the lifting cover is connected onto a fixed vertical plate in a sliding manner; the fixed vertical plate is fixedly connected onto a boiling box; a temperature measuring housing is fixedly connected onto the lifting cover. According to the candy boiling device disclosed by the invention, functions of high-temperature heating, temperature measuring and introduction of liquid nitrogen for liquid candies in the boiling box can be realized, and the liquid nitrogen is condensed and re-evaporated by an ammonia condenser pipe and a U-shaped liquid ammonia evaporating pipe, so that hot air and cold air can be respectively formed in a hot air duct anda cold air duct. When an ambient temperature of an infrared temperature-measuring sensor in a temperature stabilizing housing is extremely low, hot air is blown by the hot air duct; when the ambienttemperature is extremely high, cold air is blown by the cold air duct, so that the ambient temperature of the infrared temperature-measuring sensor is kept stable. Moreover, air is blown into a temperature-measuring through pipe of the boiling box by the hot air duct and the cold air duct by virtue of a mixing pipe, so that water vapor is discharged via a vapor outlet hole, and the measurement effect is effectively prevented from being influenced.

The invention discloses a reverse insertion testing device of a pin socket, an ICT tester and using method thereof. A height difference is formed between an upper step and a lower step of a to-be-tested pin base. The reverse insertion testing device comprises a switching type pressing element and a testing circuit. A first conductive element and a second conductive element that are arranged at anadjustable interval are arranged inside the switching type pressing element; the switching type pressing element has a disconnection state and a connection state; and the lower step abutted against the pin base, the first conductive element and the second conductive element are separated in the disconnection state and the upper step abutted against the pin base, the first conductive element and the second conductive element are connected in the connection state. The testing circuit is used for testing resistance values between a first end and a second end when the switching type pressing element is in a connection state and a disconnection state. The reverse insertion testing device is used for monitoring the pin base automatically; and problems that detection efficiency is low, the troubleshooting accuracy is low, and the troubleshooting cost is high because the operator needs to check the circuit boards one by one due to lack of a testing device for testing whether the pin base is inserted reversely on the circuit board can be solved.

The invention discloses a red-and-white blood cell suction tube for medical blood tests, and relates to the technical field of medical appliances. The red-and-white blood cell suction tube for medicalblood tests includes an outer tube, wherein the top of the outer tube is adhered to the bottom of a plastic sealing cap, both ends of the bottom of the plastic sealing cap are fixedly connected to the top of a bump, and grooves are formed in two ends of the top of the outer tube; the bump is movably connected with the grooves, slots are formed in both sides of the lower end of the bump, and a U-shaped notch is formed in the bottom of each groove; two ends of each U-shaped notch is arranged on two sides of the corresponding groove separately, the interior of each slot is movably connected to one end of a limiting block, and the other end of each limiting block penetrates through the wall of the corresponding groove, and is arranged in the corresponding U-shaped notch. According to the red-and-white blood cell suction tube for medical blood tests, contact of the interior of the red-and-white blood cell suction tube with the outside is prevented through connection of the outer tube withthe plastic sealing cap, and the plastic sealing cap can be opened conveniently through connection of a two-way thread rod with a thread cylinder.

The invention discloses an electromagnetic ultrasonic stress detection device for an oil and gas pipeline, which relates to the field of industrial nondestructive testing, and aims to solve the problem that traditional pipeline flaw detection is inaccurate. The electromagnetic ultrasonic stress detection device is characterized by comprising an electromagnetic ultrasonic probe for detecting the pipeline, and the electromagnetic ultrasonic probe is electrically connected with a receiving module for receiving signals; the receiving module is electrically connected with an acquisition module, the acquisition module is electrically connected with an upper computer, the upper computer is electrically connected with a main control module, and the main control module is electrically connected with an electromagnetic ultrasonic probe. The measurement accuracy of pipeline flaw detection is improved.

The invention discloses a method for measuring the lateral shift of a tunneling machine. The method comprises the following steps: 1) installing two independent vertical flat reflecting surfaces F1 and F2 at an initial calibration point in a tunnel, wherein the vertical flat reflecting surfaces F1 and F2 intersect up and down to form a certain angle [theta], and the length directions of the vertical flat reflecting surfaces F1 and F2 are located in the horizontal direction and match the width of the tunnel; 2) installing a laser range finder A and a laser range finder B on the tunneling machine and at different heights to measure the distance between the two vertical flat reflecting surfaces F1 and F2 separately; 3), creating a three-dimensional coordinate; 4) monitoring the support distance LX of the tunneling machine in a support process, wherein the distance between the laser range finder A and the reflecting surface F1 is LA, and the distance between the laser range finder B and the reflecting surface F2 is LB; and 5) enabling a tunneling machine controller to automatically correct a trajectory in real time according to the shift direction and the shift distance measured in the step 4). The method is not liable to easy miss the target and wide in coverage.

The invention relates to a water-cooled pressure measuring probe applicable to high-enthalpy airflows. The water-cooled pressure measuring probe comprises a casing, a first sealing member, a second sealing member, a first air inlet pipe, a second air inlet pipe, a test hole, a support member and a bottom plate. The casing comprises an outer casing and an inner casing, the outer casing is providedwith a first water inlet and a first water outlet, and a hollow interlayer with a closed rear end is arranged between the outer casing and the inner casing. The hollow interlayer comprises a front region and a rear region, the front region is divided into an upper cavity and a lower cavity by two blocking portions arranged along the length direction of the casing, the upper cavity is communicatedwith the rear region, and a sealing portion is arranged between the lower cavity and the rear region for sealing. The first water inlet is located on the lower side of the lower cavity, and the firstwater outlet is located on the lower side of the rear region. The first sealing member comprises an outer sealing member for sealing the front end of the outer casing and an inner sealing member for sealing the front end of the inner casing, and a front cavity communicated with the upper cavity and the lower cavity is formed between the outer sealing member and the inner sealing member. The water-cooled pressure measuring probe can meet the measurement requirements for the stagnation pressures of ground simulation tests for heat-insulating materials by high-enthalpy devices.

The invention provides a cuvette cleaning device, and relates to the technical field of instruments and equipment. According to the scheme, the cuvette cleaning device comprises a fixing support, a mounting support and a fixing base plate used for fixing cuvettes. The mounting bracket is connected with the fixed bracket and is positioned on the upper side of the fixed bracket; a plurality of cleaning assemblies are mounted on the mounting bracket, each cleaning assembly comprises a cleaning rotating shaft, a driving motor and a flexible protective sleeve, the driving motors are mounted on the mounting bracket, the output ends of the driving motors are connected with the cleaning rotating shafts, and the cleaning rotating shafts are sleeved with the protective sleeves; the fixing substrate is slidably connected with the fixing support and located on the lower side of the fixing support. According to the cuvette cleaning device, cuvettes can be automatically cleaned, and the situation that the cuvettes are abraded is avoided.

The invention relates to a device and method for detecting the oil level of an oil conservator of a transformer, and belongs to the technical field of transformer detection equipment. The device comprises a support; an adjusting plate which sleeves the support and is connected with the support in a sliding manner; a laser ruler which is arranged at one side of the top of the adjusting plate, and connected with the adjusting plate; and a pressure gauge which is arranged at the other side of the top of the adjusting plate, connected with the adjusting plate and communicated with the transformer expansion tank to be tested through a hose; through cooperative use of the laser ruler and the pressure gauge, the pressure of the pressure gauge at different positions away from the to-be-detected transformer expansion tank can be obtained, the liquid level height of the to-be-detected transformer expansion tank can be directly measured and calculated through different pressures and distances, the oil level detection is accurate, the oil level of the to-be-detected oil conservator of transformer can be rapidly detected in a more convenient way, and detection device and method are easy to operate, high in accuracy, high in practicability and worthy of popularization.

The invention provides a measuring device and a lithography machine, the measuring device is used to detect the polarization phase difference of the measuring light, the measuring device includes a measuring body, a wave plate, a polarizing plate, a rotating table and an image acquisition and analysis unit, the rotating The table, the polarizer and the image acquisition and analysis unit are arranged on the measurement body, the rotating table is used to drive the wave plate to rotate, and the measurement light enters after passing through the wave plate and the polarizer The image acquisition and analysis unit, the image acquisition and analysis unit is used to collect and analyze the measurement light and obtain the polarization phase difference, the measurement device also includes a cooling component, the cooling component is used to absorb the image acquisition and analysis unit and / or the heat of the turntable. The measurement device and the lithography machine in the present invention can improve the stability of the measurement device and the lithography machine.

The invention relates to an eddy current loss measuring system and method of a permanent magnet. The system comprises a detector, a power amplifier, a differential amplification circuit and a digitalsignal processing unit; the detector comprises two U-shaped magnetic cores facing each other, excitation windings wound around magnetic poles of the U-shaped magnetic cores respectively, a magnetic core fixing support for fixing the magnetic cores, a position fixed support, a bottom support platform and a sample fixing support; the upper portion of the magnetic core fixing support is provided withgrooves which match the shapes of the magnetic cores, and the magnetic cores can be just fixed in the grooves respectively after winding of the excitation windings; the lower portion of the magneticcore fixing support is provided with a sliding groove; the sampling fixing support is fixed on the bottom support platform between the two U-shaped magnetic cores; and the excitation windings are connected in series and then connected to the digital signal processing unit via the power amplifier. Thus, the practical operation condition of the magnetic field of the motor can be simulated, the totalloss condition of the permanent magnet is reflected accurately, and the method is highly repeatable.

The invention discloses a control method of a mobile multilayer marine environment profile monitoring system, the monitoring system comprises a tugboat, a drag chain and an underwater vehicle, the drag chain is connected with the tugboat and the underwater vehicle, and the tugboat is provided with a drag chain retracting and releasing mechanism; at least three sensors are arranged on the drag chain, and power supply and data transmission are realized between the sensors and the drag chain in an electromagnetic coupling manner; the control method specifically comprises the following steps: step 1, laying the underwater vehicle and the drag chain; step 2, monitoring navigation states of the tugboat and the underwater vehicle; step 3, predicting the attitude of the drag chain; and 4, drag chain attitude control: solving to obtain the position of the underwater vehicle and the adjustment length of the drag chain, and further controlling the underwater vehicle to move.

The invention relates to the technical field of electromyogram recording sensor devices and discloses a sensor device for electromyogram recording of skin muscle signals. The sensor device comprises aflexible strap, the surface of the flexible strap is fixedly connected with a hollow passage which is movably connected with a positioning groove, spring supports are movably connected to two sides of the positioning groove respectively, compression springs are movably connected in the spring supports, and a slide rod is movably connected to one end, away from the positioning groove, of each spring support. A storage box is fixedly connected to the top end of each slide rod. Sarcolemma action potential changes are converted into strong electrical signals to attract elastic rods to extend andretract so as to pull the positioning groove to move; due to symmetrical design of electromagnetic coils, magnetic forces generated by the electromagnetic coils are unequal; in addition, the electromagnetic coils drive the slide rods to slide on surfaces of slide rails when extruding the elastic rods to move, so that the positioning groove is driven to move by extrusion plates, and an effect of positioning wearable sensors is achieved.

A dynamic state monitor of roof for filling coal mining goaf in a comprehensive and mechanized way is composed of a monitor base, a multiplestage telescopic rod and a floor offer (12). The monitor base is composed of a base cylinder (5), a spring (6), a transmission cable (13), a pattern displacement meter (15) and a guide rod (7). A displacement meter support (9), a protective port (11), a spring seat (8) and range limiting plates (16, 17) are arranged in the base cylinder. The pattern displacement meter (15) contains a chip (14). The base cylinder (5) is fixed on the floor offer (12) with screws. The spring (6) is arranged in the bayonet slot of the spring seat (8), the pattern displacement meter (15) is arranged in the bayonet slot of the displacement meter support (9), the guide rod (7) is directly connected to the pattern displacement meter (15), the guide rod (7)and the pattern displacement meter (15) are sleeved in the spring (6), and the transmission cable (13) is connected with the chip (14). The multiplestage telescopic rod is composed of a first stage rod (4), a second stage rod (20) and a third stage rod (21), wherein the first stage rod is installed in the base cylinder (5)and is in direct contact with the range limiting plates (16, 17) on the guide rod (7). The second stage rod (20) is fixed in the installation groove in the first stage rod (4) with a fastening bolt (19), and the third stage rod (21) and the second stage rod (20) are fixed with a fixing bolt (2). The monitor can directly and accurately monitor the dynamic subsidence amount of the roof, and is ingenious in structure and convenient to use.

The invention discloses an anti-ice-pushing method for protecting an auxiliary steel pipe of a reservoir protection slope water measuring facility, a concrete triangular force release block is poured on a reservoir protection slope with the steel pipe as the center, the end face of the triangular force release block is an isosceles triangle, the bottom face is a rectangle, and the bottom is laid on the reservoir protection slope; a rectangular sliding steel plate consistent with the surface formed by the reservoir protection slope and the triangular force release block in shape is manufactured, the bottom face of the rectangular sliding steel plate is polished, and a plurality of steel bars parallel to the bottom end face of the rectangular sliding steel plate are welded to the top face of the rectangular sliding steel plate; the rectangular sliding steel plate covers the surfaces of the protection slope and the triangular force release block and is suspended and fixed to the top of the protection slope in a sliding mode, the bottom end of the rectangular sliding steel plate is parallel to the bottom end of the triangular force release block, and the center line is located over the ridge line of the triangular force release block. The method is used for protecting water measuring facilities on water conservancy project protection slopes such as reservoirs in cold regions and preventing sedimentation from affecting measuring results.

The invention discloses a candy boiling device, which belongs to the field of candy boiling. A candy cooking device, comprising a lifting cover, the lifting cover is slidably connected to a fixed vertical plate, the fixed vertical plate is fixedly connected to a boiling box, and a temperature measuring shell is fixedly connected to the lifting cover. It can realize the high-temperature heating of the liquid candy in the cooking box by using liquid ammonia in the temperature measurement tube, and condense and evaporate again through the ammonia condensation tube and the U-shaped liquid ammonia evaporation tube, so that the hot air cylinder and the cold air cylinder respectively form hot air and Air-conditioning, when the ambient temperature of the infrared temperature sensor in the temperature-stabilizing shell is too low, the hot air cylinder blows hot air, and when the ambient temperature is too high, the cold air cylinder blows cold air to ensure the stability of the ambient temperature of the infrared temperature sensor, while the hot air cylinder And the cold air cylinder blows air to the temperature measuring duct in the cooking box through the mixing tube, so that the water vapor is discharged through the steam outlet, effectively avoiding its influence on the measurement results.

A method for detecting the residual stress of a workpiece is provided. The method comprises 10 steps: confirming a detection portion and formulating a coordinate system, grinding the surface of the detection portion, cleaning the surface of the detection portion, sticking and inspecting the strain gauge, performing strain gauge protection, performing strain gauge connection inspection, measuring and zeroing the initial value of the strain gauge, selecting a calibration sample, cutting the workpiece and reading the strain value, and calculating the strain force. According to the method providedby the present invention, the method for processing the surface of the workpiece, the method for sticking the strain gauge, and the connection requirements for the wire are described in a detailed manner, the environmental factor is considered and the error is reduced.

The invention discloses a sewage depth detection device, and relates to the technical field of sewage, the sewage depth detection device comprises a fixed block 1, the bottom of the fixed block 1 is fixedly provided with a stress support plate, and the bottom of the stress support plate is provided with a floating assembly; the first fixing block comprises a square sliding block and an arc-shaped sleeve plate, through the first fixing block, when the third fixing block descends, the first cylindrical block located at the top can ascend, the descending distance of the third fixing block and the ascending distance of the first cylindrical block are different, the situation that a motor is needed for power driving is reduced, and resource consumption is reduced to a certain degree; and when the first cylindrical block is retracted into the first fixing block through a first pull ring, the third fixing block located at the bottom is also affected by the first pull ring to return to the interior of the first fixing block, operation is easy and convenient, the third fixing block is also easy and convenient to retract, force can be supported through the second fixing block in the first pull ring, and the situation of damage can be avoided. And the service life is prolonged to a certain extent.

The invention relates to a pollution source stink sampling system. The system comprises a sampling tube, an exhaust tube and an annular connecting part of a hollow structure, an air inlet is formed inone end of the sampling tube, the annular connecting part is arranged at the air inlet in the sampling tube, an external thread is formed in the end, close to the air inlet, of the annular connectingpart, and matched with an internal thread of the sampling tube, and an internal thread is formed in the other end of the annular connecting part and matched with an external thread of the exhaust tube; the end, away from the air inlet, of the exhaust tube extends out of the sampling tube, an air bag is connected to the end, and the air bag is arranged in a vacuum sampling box; the exhaust pipe isa polytetrafluoroethylene pipe; the system comprises a temperature control box which is arranged at the end, away from the air inlet, of the sampling tube, and the temperature control box is electrically connected with a heating device in the sampling tube. The system has the advantages that the structure is simple and reasonable, the integration level is high, equipment is small and convenient,and use is convenient.