132results about "Preventing unauthorised/accidental actuation" patented technology

The application relates to the technical field of ball valves, in particular to an eccentric half-ball valve with a buffer opening and closing mechanism convenient to adjust, which comprises a ball valve, a buffer opening and closing mechanism, a torsion mechanism and a top driving mechanism, the ball valve is fixedly connected with mounting flanges on both sides, the buffer opening and closing mechanism comprises side support rods, sliding blocks and hydraulic oil cylinders, connecting rods are hingedly arranged between the sliding blocks and the side support rods, pistons are slidably arranged in the hydraulic oil cylinders, the pistons are fixedly connected with sliding rods on the side edges, communicating side pipes are fixedly and communicatively arranged on the side walls of the hydraulic oil cylinders, adjusting cylinders are fixedly arranged on the communicating side pipes, conical heads are slidably arranged in the adjusting cylinders, the torsion mechanism is arranged on the upper side of the ball valve, and the top driving mechanism is arranged on the upper side of the torsion mechanism. The buffer opening and closing mechanism is arranged, the crank slider structure is combined with the hydraulic oil cylinder, the self-adaptive strengthening of buffer damping is realized, the rigid impact and water hammer effect during the closing of the valve disc are effectively inhibited, and the sealing surface is prevented from being abraded and deformed.

To provide a device which can lock a position of a valve, and can make a grip non-removable from the valve at the locked position.SOLUTION: A device for locking a turning grip of a valve, preferably, a rotary valve, more suitably, in particular, a ball valve or a butterfly valve comprises: the grip for operating a block mechanism of the valve; a lock ring which can be arranged at a valve housing support body for an operation device so as to be relatively non-turnable; and an adapter which can be arranged positionally fixably and separatably at a drive pin of the block mechanism. The adapter and the grip are re-separably connected to each other, the grip is arranged with a non-turnable slide ring which is movable in an axial line direction, the slide ring is movable to a locked position or an open position in the axial line direction, a turning motion of the grip is locked at the locked position of the slide ring, and the grip become non-removable from the valve depending on a position of the slide ring at the locked position.SELECTED DRAWING: Figure 3

This application discloses a valve for cryogenic liquefied natural gas, relating to the field of valves. It includes a valve body, an extended valve cover mounted on the valve body, a fixed valve seat, a movable valve seat, and a valve ball located between them, all disposed within the valve body. The extended valve cover houses a separation assembly and a switching assembly. The top of the valve ball has at least two arcuate grooves. The movable end of the separation assembly is equipped with a drive rod, both ends of which are slidably inserted into the two arcuate grooves. The thickness of the drive rod matches the thickness of the arcuate grooves, limiting the deflection of the valve ball during translation. In this application, the top of the valve ball is supported by the drive rod within the arcuate grooves, and the bottom is supported by an auxiliary block within an auxiliary groove, preventing the valve ball from tilting during translation or under pressure. The fact that the thickness of the drive rod is the same as the thickness of the arcuate grooves limits the radial displacement of the valve ball during translation, avoiding wear caused by misalignment of the sealing surface due to inaccurate separation action.

The invention relates to a safety valve closure (1) for adjusting valves (40, 40'), comprising an inner sleeve (10) and an outer sleeve (20) arranged concentrically within one another, wherein the two sleeves (10, 20) are axially movably arranged relative to each other at a defined stroke height (5) and can be moved from a pulled position to a depressed position and vice versa by pushing or pulling the outer sleeve (20) towards the inner sleeve (10), wherein the inner sleeve (10) encloses a valve chamber (11) for screwing onto a valve (40, 40'), and the outer sleeve (20) has a handle (21) for adjusting a valve (40, 40') in use, and wherein both sleeves (10, 20) have interlocking teeth (6) and recesses (7) which are axially limited such that they are only engaged in the depressed position. interlock, causing the sleeves (10,20) are rotary-coupled and wherein, in the pulled position, the outer sleeve (20) is decoupled from the inner sleeve (10) and can be rotated freely, wherein, in the pulled position, the outer sleeve (20) projects at least by the stroke height (5) beyond the upper end of the inner sleeve (10) and has a radial bore (23) axially immediately above the upper end of the inner sleeve (10), into which a bolt or shackle of a lock can be inserted to secure the valve position, which mechanically prevents the sleeves from being pressed against each other, so that no valve adjustment can occur. The invention also relates to a safety valve closure (1) with a valve (40, 40') and a safety valve (40') with an additional sealing system (51).

This invention discloses a self-locking butterfly valve linkage mechanism for switching between condensing and extraction / backflow operation modes in a 1000MW thermal power unit. It relates to the field of butterfly valves for thermal power units and includes a butterfly valve tube. Both ends of the butterfly valve tube are fixedly connected to connecting flanges. A connecting disc is fixedly connected to the top of the butterfly valve tube, and an actuator is bolted to the top of the connecting disc. Inside the butterfly valve tube, near the top and bottom, are two connecting blocks. A rotating shaft is rotatably connected between the two connecting blocks, and the outer surface of the rotating shaft is fixedly connected to the connecting blocks. A conical sealing plate is fixedly connected to the side of the connecting blocks. Inside the butterfly valve tube, symmetrically fixed to the sides of the connecting blocks, are a pair of connecting blocks (two secondary blocks). A flow divider is rotatably connected between the two connecting blocks (two secondary blocks). This invention, through the synchronous rotation mechanism of the pulley, belt, and flow divider, allows the flow divider to automatically adjust its angle when the valve is opened, diverting the inflow of water and effectively reducing the direct impact of the water flow on the side of the conical sealing plate.

The anti-rebound high-pressure electric explosion valve comprises a shell, a cutter, a pin lock, a sealing seat, a spring seat, a unloading valve core, a small spring, a steel ball, a pin lock rod and a large spring; the cutter is arranged in the inner cavity of the shell; the sealing seat, the pin lock rod and the large spring are sequentially arranged in the cutter, the sealing seat is connected with the tapered end of the cutter through external threads, one end of the pin lock rod is inserted into the sealing seat, the other end of the pin lock rod is connected with one end of the large spring, and the other end of the large spring is connected with the cutter; the cutter is provided with a locking groove, the steel ball and the pin lock are arranged in the locking groove, the steel ball is in contact with the pin lock rod, and the pin lock is pressed on the steel ball; the unloading valve core is arranged in the sealing seat, the small spring is fixedly connected to the spring seat, the small spring is sleeved on the unloading valve core, and the spring seat is connected with the sealing seat; and the inner cavity side wall of the shell is provided with a pin lock groove. The anti-rebound high-pressure electric explosion valve has a pin lock structure, can be directly locked by using the action force of high-pressure medium, and can effectively prevent the cutter from rebounding under the action of high pressure after explosion.

[Problem] To provide a switching valve in which the actions of a spool valve and a detent mechanism are synchronized. [Solution] A selector valve 1A has a spool valve part 5 for switching the communication state between a plurality of ports by means of spools 8, 10 accommodated in a valve port 7 via which the ports communicate, first and second drive parts 30, 40 for driving the spools by means of a pilot fluid so as to shift the spool valve part to a plurality of switching states, and a detent mechanism part 60 for holding the spool valve part in a specific switching state. The detent mechanism part has an engagement rod 62 movably accommodated in a slide hole 74, a recess 63 provided in a spool, and a detent drive part 64 for causing the engagement rod to engage with and disengage from the recess. The detent drive part has a piston 66, a spring member 67 for biasing the engagement rod to the recess side, a pressure chamber 61b for withdrawing the engagement rod from the recess, and a communication flow passage 68 via which a pilot flow passage 44 and the second chamber 61b communicate.

This utility model discloses a ball valve with good sealing performance, relating to the field of ball valve technology. It includes a housing, inside which a ball is rotatably disposed. A fixed cylinder is fixedly disposed at the upper end of the housing, and a rotating rod is rotatably disposed inside the fixed cylinder. The lower end of the rotating rod is fixedly connected to the ball, and a sealing ring is connected between the rotating rod and the fixed cylinder. A rotating disk is fixedly connected to the upper end of the rotating rod. A water passage hole is fixedly opened in the middle of the ball, and a flow-diverting annular groove is provided inside the ball. During use, this utility model avoids friction between the first and second hollow sealing rubber bodies and the inner wall of the housing when the ball rotates, reducing their wear rate. This solves the problem in existing ball valves where the sealing rubber ring wears down during ball rotation, resulting in poor sealing performance and reduced practicality.

The application discloses a small intelligent control electric actuator, which comprises a box body, a motor box is installed on one side of the bottom end of the box body, a heat conduction plate is arranged on the outer wall of the motor box, a motor is installed in the motor box, and a motor rotor is connected to the power output end of the motor. The beneficial effect is that through the design of the worm, the turbine, the main shaft and the output shaft, when the valve is in a half-open state, the electric rotating disc rotates, so that the hydraulic cylinder drives the plug post on the rotating disc into the plug slot, the top end of the output shaft is quickly locked, and the impact force of the liquid is prevented from changing the state of the valve; through the design of the L-shaped plate, the magnetic attraction plate and the limiting insertion hole, when the device is manually opened and closed, the provided lever can be directly attracted to the magnetic attraction plate, the lever is limited at one end through the limiting insertion hole, the L-shaped plate can effectively store the lever, and the trouble of separate carrying is avoided.

The utility model discloses a fluid connector joint and fluid connector relates to fluid connector technical field, wherein, fluid connector joint, include: valve body, inside setting fluid passage and the valve core of control fluid passage on-off, float member is connected with valve body sliding, only when float member is in first locking position, float member and valve core or its driving portion abut, for locking the action of valve core or its driving portion, locking portion is connected with valve body sliding, only when locking portion is in second locking position, locking portion and float member in first locking position abut, for limiting float member to separate first locking position, the operating portion of locking portion extends to the outside of valve body, when fluid connector joint and fluid connector plug are inserted, fluid connector plug abut and drive operating portion slide to the inside of valve body, for driving locking portion to separate second locking position, the fluid connector joint and fluid connector of this, can realize the unlocking of valve core locking automatically when completing the insertion.

The application relates to the technical field of regulating valves, in particular to a high-durability split type instrument ball valve for corrugated pipe connection, which comprises a valve body, a supporting disc arranged above the valve body, a rotating rod vertically arranged in the supporting disc and connected with a ball body in the valve body, a supporting plate vertically arranged on the upper end surface of the supporting disc, a sealing mechanism slidingly arranged on the inner side surface of the supporting plate and connected with the upper end surface of the rotating rod, a manual adjusting mechanism arranged on one side surface of the rotating rod and connected with the supporting disc, and a power supply mechanism arranged on the lower end surface of the supporting disc. The application has the functions of electrically and manually opening and closing the valve, has good protection, can prevent misoperation and miscontact by using the locking structure, and greatly prolongs the service life of the ball valve.

The utility model relates to the technical field of heavy mechanical valves, in particular to a self-lubricating heavy mechanical valve which comprises a heavy mechanical valve body and an oil tank, a valve seat is fixedly connected to the heavy mechanical valve body, a valve rod is rotatably mounted on the valve seat, and a round seat communicated with the oil tank is fixedly connected to the lower side of the oil tank. One side of the round seat is fixedly connected with an oil outlet pipe communicated with the round seat; the oil discharging mechanism comprises a piston located in the round seat, the interior of the round seat is slidably connected with a first guide rod, and one side of the first guide rod is fixedly connected with the piston. The cam jacks up the rolling wheel to drive the piston to move, automatic conveying of lubricating oil is achieved, the annular sponge can evenly infiltrate the valve rod, surrounding type lubrication is formed, and the service life of the valve rod is prolonged. Friction and oxidation corrosion of the valve rod are effectively reduced, the lubrication process can be rapidly started and stopped through the linkage design of the operating hand wheel and the clamping rod, it is guaranteed that lubrication is precise and controllable, waste of lubricating oil is avoided, and the service life of the valve rod is prolonged.

The application discloses a ball valve, which comprises a main pipeline, a fixed cover is fixedly connected to the upper side wall of the main pipeline, a ball is movably embedded in the inner wall of the main pipeline and is located below the fixed cover, an arc-shaped movable groove matched with the ball is formed in the inner wall of the main pipeline, a water through hole is formed in the middle part of the ball, a rotating shaft is movably and fixedly connected to the upper side wall of the ball and extends through the inner top wall of the main pipeline and into the fixed cover, a tooth rod is movably and fixedly arranged in the upper side wall of the fixed cover, and a limiting mechanism is arranged on one side of the tooth rod in the fixed cover. The rotating mode is replaced by the pressing mode, so that the ball valve is conveniently opened, and under the impact of flowing water on the turbine, the cleaning brush can reciprocally clean the filter screen, the filtering effect of the filter screen is ensured, the main pipeline is prevented from being blocked, and the user only needs to push the push plate inward to achieve the effect that the ball valve is automatically closed, so that the ball valve is convenient to use.

This utility model relates to the field of valve technology, and in particular to a convenient and highly secure magnetic anti-theft opening and closing mechanism, comprising a valve body, a valve stem, an upper valve cover, a lower valve cover, a valve plate, a round pin, a magnetic key, a first permanent magnet, a second permanent magnet, a first O-ring, a second O-ring, and a spring. The lower valve cover has a lower mounting hole located on the periphery of the valve stem, and the upper valve cover has an upper mounting hole communicating with the lower mounting hole. The spring and the first permanent magnet are disposed within the upper and lower mounting holes, respectively. The upper valve cover has a positioning hole located on the periphery of the valve stem. The magnetic key is detachably mounted on the upper valve cover, and the second permanent magnet is mounted on the magnetic key. The magnetic key has a positioning rod that mates with the positioning hole. When the positioning rod is inserted into the positioning hole, the second permanent magnet is positioned above the first permanent magnet, and the lower magnetic pole of the second permanent magnet is the same as the upper magnetic pole of the first permanent magnet.

The present application provides a kind of solenoid valve valve group, with: solenoid valve, with output port;Valve group base, with output flow path;And gasket, between valve group base and solenoid valve between.Gasket has: gasket block, with shaft hole;And manual shaft, is housed in shaft hole.Gasket block has with the output communication flow path of shaft hole communication and makes output flow path and output port each other intercommunication.Manual shaft is configured: by manual operation, so as to be switched to the 1st switching position and the 2nd switching position, the 1st switching position is the position that allows the intercommunication of output flow path and output port via output communication flow path, and the 2nd switching position is the position that blocks the intercommunication of output flow path and output port via output communication flow path.

This prevents the operator's fingers from getting caught when operating the lever of a ball valve. [Solution] This ball valve pinch prevention seat 16 comprises a seat body 16a and a fitting hole 16b provided in the seat body 16a that can be fitted to a portion of the rotating shaft 13 that is further from the cylindrical body 12 than the connecting portion of the lever 14. When the rotating shaft 13 is fitted into the fitting hole 16b and the seat body 16a is fixed to the rotating shaft 13, the seat body 16a has a predetermined size and shape so that it can cover the portion 15a of the restricting portion 15 that comes into contact with the lever 14 when viewed from a direction along the rotating shaft 13.

A fail-safe isolation valve apparatus includes: a flow channel provided with a communication hole through which a fluid passes; a plug opening and closing the communication hole; a return member pressing the plug in a first direction to close the communication hole; and a plurality of support parts supporting the plug to maintain a first position. The plurality of support parts independently generate a supporting force to maintain the plug in the first position. When the plurality of support parts simultaneously lose the supporting force, the plug moves to a second position different from the first position.

The application provides an outdoor water faucet with locking function, which comprises a shell, a base in detachable connection with the bottom of the shell, a fixed seat, a first water outlet switch, a first valve, a second water outlet switch, a second valve, a third water outlet switch, a third valve and a fourth water outlet switch arranged in sequence from bottom to top and abutting each other in the shell, a first water inlet, a second water inlet, a third water inlet and a fourth water inlet which are arranged in the circumferential direction of the fixed seat and are in communication with the water passing cavity, and an opening and closing device, wherein the opening and closing device comprises a sealing plate, a movable column, a limiting plate and a positioning plate, the sealing plate is arranged between the base and the fixed seat, the limiting plate is provided with a handle, the bottom of the positioning plate is provided with a clamping groove matched with the handle, and a lock hole is arranged on the outer circle of the positioning plate and is in communication with the clamping groove. The application is convenient to use, can provide water in four directions for four people to use at the same time, and can avoid children playing with water.

The present invention relates to a knob assembly and a cooking apparatus including same, the knob assembly comprising: a valve cap coupled to a heating driving part for controlling the supply of an energy source to a cooking part of the cooking apparatus; a knob part which is coupled to a shaft member so as to move together with the shaft member along a rotational axis of the shaft member protruding from an operating panel of the cooking apparatus and rotate together with the shaft member around the rotational axis; and a base part coupled to the valve cap between the valve cap and the knob part, wherein the valve cap is coupled to a gas pipe of the heating driving part, the base part includes a base body coupled to the valve cap, and locking protrusions protruding from the base body in a first direction toward the knob part, and operation buttons of the knob part can move between a locking position at which the knob protrusions protruding from the operation buttons interfere with the locking protrusions and an unlocking position at which the knob protrusions avoid interference with the locking protrusions.

The utility model discloses a gate valve with auxiliary locking structure relates to the field of gate valve, the inside of gate valve body is installed and reserves the closed valve spare, and the opening and closing control processing is carried out through the reserve closed valve spare, the inside of reserve closed valve spare is nested and is installed the nested reservation spare, and the outside fixed connection of nested reservation spare has the first spring. This gate valve with auxiliary locking structure is provided with self -adaptation locking structure, and the reserve closed valve spare of closed state is carried out auxiliary self -locking processing through self -adaptation locking structure, realizes the locking processing between gate valve body, realizes the locking closed processing of self -adaptation while the long -term bearing high -strength shunt waterway impact, will not cause the gate valve to exist influence because of the liquid flow too big and lead to its closed nature, prevent the phenomenon such as leakage, make the valve according to the pressure change and carry out the self -warning type protection operation, avoid the damage that appears after the subsequent user delayed reaction can not be retrieved.

The application relates to the technical field of three-way valves, in particular to a three-way ball valve structure with a self-locking structure and a regulating method thereof, which comprises a valve body, a valve rod rotatably arranged on the valve body, a ball rotatably arranged in the valve body, and the ball being fixedly connected with one end of the valve rod; the other end of the valve rod is provided with a driving rod through a connecting structure; a frame is fixedly arranged on the valve body; a locking assembly is arranged between the driving rod and the frame; a support is fixedly arranged on the frame; a rotating cylinder is rotatably arranged on the support; a delay transmission structure is arranged between the driving rod and the rotating cylinder; an unlocking assembly is arranged between the rotating cylinder and the driving rod; a high-pressure prevention assembly is arranged in the valve body and connected with the rotating cylinder through a linkage structure; the locking assembly has the functions of self-locking and delay in switching the connecting pipeline; compared with the traditional one, the design can avoid the waste of medium caused by the misoperation or misoperation of personnel and improve the safety performance.

The utility model provides a kind of steel valve chain lock, including locking assembly, first locking mechanism and chain, wherein, locking assembly is equipped in the top of ball valve, locking cavity is equipped on locking assembly, and the valve core switch of ball valve is equipped in locking cavity;First locking mechanism is equipped in the bottom of locking assembly, and first locking mechanism is used to fix locking assembly and ball valve in axial direction;Chain is equipped on locking assembly at one end, and chain is locked with locking assembly after passing through the valve body of ball valve, to fix locking assembly and ball valve in radial direction.The utility model forms protective barrier by locking cavity full package valve core switch, cooperates with the first locking mechanism of axial fixation and the chain of radial fixation to form three-dimensional constraint, so that the valve core switch of ball valve is completely separated from contactable range, double locking mechanism breaks through the passive protection mode of traditional warning sign, fundamentally eliminates the physical possibility of valve stem rotation, and then prevents ball valve from opening when stopping gas maintenance, improves the safety of pipe network maintenance.

The utility model relates to valve technical field especially relates to self -locking safety valve interlock monitoring bottom valve, self -locking safety valve interlock monitoring bottom valve, including valve body, valve handle, valve plate, valve rod, valve rod shield and valve cover, be equipped with concave and convex groove on the valve rod, be equipped with male slot in concave and convex groove, the concave and convex groove in the corresponding position of valve cover is equipped with recess, the valve body is equipped with valve seat and upper seal seat respectively, spring and information sensor are installed in recess, when the valve opening reaches the full open position, the male slot of valve rod and recess of valve cover are locked through spring thrust engagement, information sensor generates locking signal and is transmitted to integrated controller through signal transmission circuit, integrated controller and central control system communication connection. The utility model eliminates the safety hidden danger such as overpressure explosion, equipment damage caused by root valve error closing from the root, and through the real -time communication of information sensor and central control, realizes the digital monitoring of valve full open state.

The utility model relates to floating ball valve technical field especially relates to a floating ball valve with overpressure protection function, its technical scheme includes: the one side of valve body is equipped with the valve cover, is equipped with the handle on the valve body, the one side equipped with second flange plate of valve body away from the valve cover, the valve cover is equipped with the connecting pipe, the valve cover is connected with the protection tube through the connecting pipe, the one end equipped with first flange plate of protection tube away from the valve cover, be equipped with the guide rod in the protection tube, be equipped with the tension spring on the guide rod, be equipped with the baffle on the guide rod through the tension spring, and the area of baffle is greater than the inside diameter of connecting pipe, when the excessive pressure in pipeline, through the fluid in pipeline and push baffle to carry out the plugging to connecting pipe, the utility model discloses through the tension spring and the guide rod cooperation realizes the automatic reset of baffle, utilizes the through -hole misregistration design and guarantees the normal flow of medium, with simple and reliable mechanical structure, realizes the quick response overpressure protection, effectively promotes the security and practicality of floating ball valve.

A two-hand wheel control valve core includes a valve housing assembly, a stationary valve plate, a movable valve plate, a valve handle, and an adjusting sleeve. The stationary valve plate is fixed inside the valve housing assembly and has cold water and hot water inlet holes and a mixing outlet hole. The movable valve plate is located above the stationary valve plate, and its mixing chamber can connect or disconnect with each hole through sliding or rotation. The valve handle is hinged to the valve housing assembly, and when it swings, it drives the movable valve plate to slide, thereby adjusting the water flow and opening / closing state of the mixing outlet hole. The adjusting sleeve is rotatably mounted on the valve housing assembly, and when it rotates, it drives the movable valve plate to rotate, adjusting the ratio of cold and hot water entering the mixing chamber, thereby precisely controlling the water temperature of the mixing outlet hole. This design achieves independent adjustment of water flow and water temperature, effectively avoiding mutual interference, greatly improving the performance of the faucet, meeting users' needs for high-quality, high-performance faucets, and has significant innovative value and application prospects in the field of faucet valve cores.

An embodiment of the invention provides an anti-theft system for backflow preventers comprising a steel bar with specialized catches and protective flanges that integrate with existing protective cages. The preferred embodiment utilizes a modified rebar or steel bar of standard length with T-catches, rectangular flanges with precisely sized holes, and square tubing designed to shield a lock from tampering. An embodiment of the invention can be installed directly in the field through basic modifications to existing cages, creating multiple layers of security that prevent unauthorized access and removal. The preferred embodiment provides a cost-effective solution compared to backflow preventer replacement costs.

The utility model relates to the technical field of anti-static ball valve, specifically disclose a novel anti-static ball valve, including valve body, valve rod and install fixed handle on one side of valve rod, the top of fixed handle is provided with folding groove, be provided with folding assembly in folding groove, folding assembly includes folding board and fixed rod, folding board rotatory connection is in folding groove, two groups fixed rod are fixedly connected in the both sides of folding board, the utility model discloses setting up fixed handle, folding board, extension plate, folding groove, fixed block and fixed assembly, lift extension plate upward to make folding board reverse and be clamped into folding groove, press down to extension plate, make extension plate and be clamped in folding board top, extension plate clamps into folding groove, and fixed assembly fixes and limits position extension plate, can reduce the impact and the mistaken touch condition due to fixed handle too long, and convenient equipment removes and staff operation simultaneously, save space.

The application relates to a mistaken-touch-preventing ball valve which comprises a valve body and a valve rod, one end of the valve rod is located in the valve body and is provided with a ball core, the other end of the valve rod penetrates through the valve body and is provided with a handle, the valve body is provided with an annular block near one end of the handle, a rotating cavity for rotating the handle is formed in the annular block, a placing groove is further arranged in the valve body and is communicated with the rotating cavity, a partition plate is slidably connected in the placing groove, control rods are slidably connected on both sides of the rotating cavity, the control rods are located on both sides of the placing groove, a transmission rod is further arranged in the valve body and is rotationally connected with the valve body at the center, and the partition plate and the control rods are located at two ends of the transmission rod respectively. The mistaken-touch-preventing ball valve has the effect that the ball valve can keep a stable working state during work and is not easily interfered by the outside world.

This utility model discloses a butterfly valve with a locking function, including a valve body, an extension tube, a valve stem, and a butterfly plate; it also includes a locking mechanism, which comprises an operating ring, a push rod, and a spring. The operating ring is sleeved on the outer circumference of the extension tube, and a guide hole is provided through the side of the extension tube. The push rod is slidably disposed in the guide hole. The spring applies a spring force to the push rod in a direction away from the valve stem. The inner circular surface of the operating ring is provided with a first annular groove, a second annular groove, and a conical groove. The inner diameter of the first annular groove is smaller than the inner diameter of the second annular groove. When the operating ring moves axially, the push rod has a locked position where its outer end abuts against the inner circular surface of the first annular groove and its inner end abuts against the outer circular surface of the valve stem, and an unlocked position where its outer end abuts against the inner circular surface of the second annular groove and its inner end disengages from the outer circular surface of the valve stem. This utility model can lock the valve when it is closed, preventing accidental opening of the butterfly valve due to employee misoperation or accidental contact, which could lead to safety accidents such as media leakage or explosion.

This invention belongs to the field of valve devices and discloses a handle valve anti-accidental contact device, comprising: a base fixed to the valve body of the handle valve; a limiting component that extends through the base and slides with the base; and a telescopic component disposed in a horizontal through hole in the base. The extensions have limiting holes that cooperate with the telescopic component to restrict the vertical movement of the limiting component relative to the base. The handle valve anti-accidental contact device of this invention achieves adjustable positioning of the limiting component through the cooperation of the telescopic component and the limiting holes. The precise cooperation between the extensions and the handle provides high limiting stability, effectively preventing accidental operation of the equipment by human error, significantly reducing human error, and ensuring the safe and stable operation of the unit.