65results about How to "Secure working space" patented technology

An engine oxygen concentration sensor mounting structure in which an oxygen concentration sensor is mounted in an exhaust pipe connected to an outlet of an exhaust manifold having a plurality of exhaust single pipes. When a straight line is drawn from a detection part of the oxygen concentration sensor positioned within the exhaust pipe so as to be parallel to a section of a centerline of the exhaust pipe closest to the detection part, the straight line passes outside the outlet of the exhaust manifold. This allows the exhaust gases discharged from the exhaust manifold to be sufficiently mixed within the curved exhaust pipe and differences in length of the plurality of the exhaust single pipes to be compensated for. Thus, accurate detection by the oxygen concentration sensor can be secured, even if the lengths of a plurality of exhaust single pipes of the exhaust manifold are nonuniform.

The invention discloses a self-learning-based rotation control method for a dangerous condition of a tower crane. The self-learning-based rotation control method particularly comprises the following steps of: 1, carrying out self-learning on the inertia and a rotation running characteristic of the tower crane on the tower crane; 2, carrying out deceleration or shutoff control as appropriate according to the current running state of the tower crane; 3, after low-speed cut-off control of the tower crane, executing closed-loop control, if the dangerous angle of the tower crane at the time is more than an ideal parking position, re-starting low speed in a control direction of the tower crane by a system, allowing the tower crane to continuously advance at a low speed to be close to a target position; and 4, immediately braking when the tower crane enters a red line due to out of control, directly stopping the tower crane, delaying a brake for a certain time, then opening the brake and allowing the tower crane to rotate towards a safety direction. According to the self-learning-based rotation control method, the rotation of the tower crane is passively controlled, the parking regulation and braking control are carried out to ensure the parking stability, and the impaction of the rotation inertia of the tower crane is avoided.

The invention provides a suspension rail type rock drilling machine which can be used for solving the defects of poor flexibility of a drilling arm, movement restriction due to a tunnel bottom plate condition, low degree of automation, low working efficiency and the like in the prior art. The suspension rail type rock drilling machine comprises a machine body, a rock drilling device, a travelling mechanism and a hydraulic pump station and is technically characterized in that a rectangular-axis slewing mechanism and a rock drilling device control arm which is provided with a vertical-regulation hydraulic cylinder, a lifting hydraulic cylinder and a transverse-regulation hydraulic cylinder are adopted for connecting the rock drilling device; a driven travelling wheel and a driving wheel on the upper part of the machine body are adopted for moving along a travelling rail at the top of a tunnel; the hydraulic pump station which is suspended on the travelling rail by use of the driven travelling wheel is connected to the rear part of the machine body. The suspension rail type rock drilling machine is reasonable in design, compact in structure, small in tunnel occupied space, simple and convenient to operate, and stable, safe and reliable in movement, can perform permanent support operations such as anchor rod drilling and anchor rope drilling according to different geological conditions and the cross-section shape of the tunnel and can perform blasting hole drilling operation on a blasting working face, so that the production efficiency and support quality of a driving working face are remarkably improved.

The present invention provides a control device and a control method of a sewing machine. The control device of the sewing machine easily sets the height data of the sewed object into the sewing pattern data. The control device of the invention comprises the following components: a motor of sewing machine, which causes a sewing needle to move vertically; an intermediate presser foot which prevents the floating of the sewed object in sewing; an intermediate presser foot vertical-moving mechanism which vertically moves the intermediate presser foot synchronously with the sewing needle; a heightadjusting mechanism which adjusts the height of a lower dead point of the intermediate presser foot through the intermediate presser foot motor; an intermediate presser foot control unit which controls the intermediate presser foot motor for stopping the intermediate presser foot through the pressing when the intermediate presser foot descends and contacts; a thickness obtaining unit which computes the thickness of the sewed object according to the height of the intermediate presser foot in the state variation of an output shaft of the intermediate presser foot motor, which is caused by the descending and contacting of the intermediate presser foot; and a thickness recording unit which records the thickness of the sewed object into the sewing pattern data corresponding with the sequence of the needle number.

The invention relates to a circulating spray absorption tower for flue gas purification treatment. The absorption tower comprises a cylindrical liquid storage tower body and a cylindrical spray towerbody connected with the top end of the liquid storage tower body; a cleaning and scraping mechanism is arranged on the liquid storage tower body; two spraying pipeline assemblies capable of horizontally rotating are vertically arranged in the spray tower body; and a rotation driving mechanism used for driving the two spraying pipeline assemblies to rotate is arranged on the outer side wall of thespray tower body. According to the absorption tower provided by the invention, a spraying medium liquid can be uniformly and widely distributed in the spraying space, so that flue gas flowing upwardscan be in contact exchange with the spraying medium liquid at equal probability, and the spraying absorption effect can be improved and guaranteed; in addition, solid precipitates can be continuouslyscraped off, and formation and accumulation of a precipitation layer are avoided.

The present invention discloses an air conditioner capable of switching easily the front panel used for opening the front of the body, and opening the panel completely. The air conditioner of the present invention comprises a body forming the appearance, a front panel used for opening the front of the body, wherein the front panel slides towards the right and left direction to open/close by means of a first roller arranged on the upper part of the front panel and a second roller arranged on the bottom part of the front panel. And, each of the first roller and the second roller comprises a guide track arranged on one of the body and the front panel, and a plurality of roller arranged on the other.

The present invention comprises a branching pipe joint, for distributing a refrigerant that flows within a main pipe to two flows, and an air conditioner provided therewith, and achieves both the compaction of the vicinity of the branch part and the prevention of drift therein. A branching pipe joint (181) comprises a substantially Y-pipe shaped branch part (182), a first branch nozzle part (183), a second branch nozzle part (184), and a first branch pipe (186). The first branch pipe (186) is a pipe member, wherein one end part is connected to a tip part of the first branch nozzle part (183) during plumbing work. The first branch nozzle part (183) and the second branch nozzle part (184) are disposed so that a spacing between a portion of the tip part of the first branch nozzle part (183) nearest the second branch nozzle part (184) side and a portion of the second branch nozzle part nearest the tip part of the first branch nozzle part is less than or equal to 40 mm.

The present invention provides an air conditioner capable of switching the front panel easily and opening the bottom part in the front of the body to ensure working space adequately. The air conditioner of the present invention comprises a body forming the appearance, a front panel used for opening the front of the body, a hinge used for hinge joint the front panel with the body for switching the front of the body. And the hinge forms an isolation space for isolating the rotating shaft center of the front panel from the front panel so as to prevent the front panel from interfering with the body when front panel is rotated. The hinge comprises a rotating shaft rotatablely supported on the body, a joining part joined to the front panel, a hinge body connecting the rotating shaft with the joining part. The hinge body comprises a rear extension part extending towards the rear of the rotating shaft, an inner extension part bending towards the inner side of the body from one end of the rear extension part and extending, and a front extension part bending towards the front from one end of the inner extension part and extending.

The invention provides an elevator comprising a car (1), an upper beam (2) integrally spanned with the car (1) and an air conditioning plant (10) arranged above the car (1) in a way that the height oftop thereof is below the upper surface of the upper beam (2). A safe gird (6) for operation is arranged on the upper beam (2). A mounting rod (3) with the height of top thereof disposed below the upper surface of the upper beam (2) is fixed on the upper beam (2).

A ring-shaped cofferdam and temporary pit excavation structure using tapered square pipes includes a plurality of tapered square pipes a trapezoidal cross-section, in which the plurality of tapered square pipes each have a coupling protrusion or a coupling groove formed in a longitudinal direction on a first side, the plurality of tapered square pipes each have a coupling protrusion or a coupling groove formed in the longitudinal direction on a second side, the plurality of tapered square pipes are assembled by coupling the coupling protrusions and the coupling grooves, a long side of two parallel sides of the trapezoid is disposed outside, and a short side is disposed inside.

The present invention provides an indirect lighting lamp cover device which has an indirect lighting cover (10) having an L-shaped sectional plane and being installed on a ceiling part in an elevator cage (24) for covering a lighting lamp (18), a fixing bracket (12) fixed on the bottom surface of the indirect lighting cover (10), and a milk white plastic plate (15) having an L-shaped sectional plane and being fixed the fixing bracket (12) in a free disassembly and assembly way, therefore, the lighting lamp (18) is covered by the indirect lighting cover (10) through the L-shaped milk white plastic plate (15).

An installation structure of an external filter case for a refrigerator is provided. The filter case may include a main body that provides an inner space in which an internal line may be installed and water filters may be installed, and a cover that covers the inner space of the main body and is detachably coupled with the main body. The main body may have an open front side and may include bosses that protrude from its bottom face. The cover may include insertion holes into which the bosses may be inserted. A lower portion of the main body may be coupled with a lower portion of the cover. Magnets may be installed in upper portions of the main body and the cover, respectively, such that the main body and the cover may be coupled with each other by a magnetic force.

The invention relates to the technical field of underwater robots, and particularly relates to an underwater unmanned cable-free operation type robot which comprises a bow part, a middle part and a stern part. The bow part, the middle part and the stern part are each a hollow structure, and a mechanical arm lifting device and a cabin door opening and closing mechanism are arranged in the middle part; and a first horizontal channel propeller and a first vertical channel propeller are arranged on the bow portion, two second vertical channel propellers and four main propellers are arranged on the stern portion, and therefore high-speed cruising of the underwater unmanned cable-free operation type robot can be achieved, and stable and accurate hovering needed by operation of the underwater unmanned cable-free operation type robot can be met.

This engine is provided with: a crankshaft that rotates centered around an axis line; and a flywheel (16) having a circular plate shape and connected to the axis line of the crankshaft at the center thereof. The flywheel (16) has: a main body (27) affixed to the crankshaft; and a first split member (28) and second split member (29) that are removably affixed to the main body (27). When the first split member (28) and second split member (29) are affixed to the main body (27), a portion of the side surface of the flywheel (16) and a portion of the bottom surface facing an engine main body of the two circular bottom surfaces of the flywheel (16) are formed.