CN212693225U - Valve test equipment - Google Patents

Abstract

The utility model discloses a valve testing device, which is characterized in that a separation plate is fixedly connected in a cabinet body, a plurality of groups of positioning grooves are arranged along the length direction of the cabinet body, a movable plate matched with the positioning grooves and a limiting component for fixing the movable plate in the positioning grooves, the separation plate and the movable plate are sequentially arranged along a rotating plate towards the moving body, two opposite side walls of the separation plate, the movable plate and the cabinet body jointly enclose a water collecting area for collecting water flowing up and down from a valve, a filtering component is arranged at one end of a liquid through pipe extending into the water collecting area, through arranging the fly leaf in the positioning groove of different positions so that collect the water that flows down when different specification valves detect, the internal water of cabinet flows through the water injector after filtering the subassembly and filtering, has solved among the prior art parts such as the moving body, the circuit of being connected with the moving body and the circuit of being connected with the commentaries on classics board and have soaked in water and cause the problem that zero device rusts or intake and impurity get into the water injector and cause the jam.

Description

Valve test equipment

Technical Field

The utility model relates to a valve testing machine field, more specifically the utility model relates to a valve test equipment that says so.

Background

The tightness of the valve is an important quality index, the product is required to be subjected to sealing test when leaving factory to detect whether the valve leaks, a common pressure tester comprises a cabinet body, a rotating plate which is rotationally connected with the cabinet body, a moving body which moves linearly relative to the cabinet body, and two clamping assemblies which are respectively positioned on the rotating plate and the moving body, the valve is positioned by the paired clamping assemblies, the cabinet body is filled with water, a water injector injects the water in the cabinet body into the valve for tightness detection, if the leaked water flows back into the cabinet body, after the detection is finished, the water in the valve flows back into the cabinet body when the valve is separated from one of the clamping assemblies, the water in the valve is recycled in the whole process, the water in the cabinet body is replaced for a long time, and the defect exists, the detected valve has different degrees of rusting and impurities also remain in the valve, the rusty part has particles falling under the flowing of water, residual impurities in the valve can also fall into the cabinet body along with the flowing of the water, and since the cabinet body is not provided with a cover, some particles outside can also fall into the cabinet body, so that solid impurities are deposited in the water of the cabinet body, and the solid impurities can enter the water injector when the water injector pumps water, so that the damage and the blockage of the water injector and a pipeline are easily caused; and in prior art, the cabinet body is taken as a water tank, the circuit on the rotating plate and the moving body are locally soaked in water in the cabinet body, parts on the moving body rust for a long time, so that the moving body moves relative to the cabinet body, the circuit can easily influence the control circuit due to rusting of the shell and water inflow, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a not enough to prior art exists, the utility model aims to provide a prevent that solid particle from getting into in the water injector, can all separate the high valve test equipment of security with moving body and circuit with water.

In order to achieve the above purpose, the utility model provides a following technical scheme: a valve test device comprises a cabinet body for containing water, a moving body connected with the cabinet body in a sliding manner, a rotating plate connected with the cabinet body in a rotating manner, two clamping assemblies respectively positioned on the moving body and the rotating plate, a pusher for driving the moving body to move, a rotating motor for driving the rotating plate to rotate, a water injector positioned on the rotating plate and communicated with the clamping assemblies, and a liquid passing pipe for introducing the water in the cabinet body into the water injector, wherein the liquid passing pipe is deformable, a partition plate, a plurality of groups of positioning grooves arranged along the length direction of the cabinet body, a movable plate matched with the positioning grooves, and a limiting assembly for fixing the movable plate in the positioning grooves are fixedly connected in the cabinet body, the partition plate and the movable plate are sequentially arranged along the direction of the rotating plate towards the moving body, and two opposite side walls of the partition plate, the movable plate and the cabinet body jointly enclose a water collecting area for receiving the water flowing upwards and downwards of a, the liquid pipe stretches into one of catchment area and serves and be provided with filtering component, through arranging the fly leaf in the positioning groove of different positions so that collect the water that flows down when different specification valves detect, the internal water of cabinet flows through the water injector after filtering component filters.

As a further improvement, the filter assembly includes a plurality of stand on the cabinet body bottom plate, a division plate that all links to each other with the one end of a plurality of stabilizer blade and the filter screen that is the geometry form, the filter screen encloses into a cavity with the division plate bottom plate jointly, lead to the one end that the liquid pipe is located the water catch area and be connected with the division plate and communicate with the cavity.

As a further improvement, the utility model also comprises a ventilation part positioned on the cabinet body, the ventilation part is externally connected with a ventilation pipe, the part enclosed by the filter screen and the division plate is communicated with the ventilation pipe, and the ventilation pipe is fixedly connected on the division plate.

As a further improvement, the filter screen and the stabilizer blade are located the both ends face of division board respectively, the top filter screen and the peripheral filter screen that set up about the filter screen is including being, the edge setting of peripheral filter screen edge division board, the top filter screen upwards arches and forms the sphere.

As a further improvement, the peripheral filter screen is arranged obliquely relative to the partition plate.

As a further improvement, the edge of the movable plate is provided with a sealing layer for being attached to and softening the cabinet.

As a further improvement of the utility model, spacing subassembly including can stretch into the positioning groove compress tightly the piece, with compress tightly a fixed connection's connection piece and with cabinet body threaded connection's fastening bolt, fastening bolt through connection piece, compress tightly the piece and be located the fly leaf top and contradict with the fly leaf, through fastening bolt downward rotation and drive the connection piece to cabinet body motion, compress tightly the piece and push down the fly leaf under the drive of connection piece.

As a further improvement, the number of the limiting assemblies is two and is respectively located on two opposite side walls of the cabinet body.

As a further improvement, the fly leaf up end forms the inclined plane through the beveling, the lower extreme that compresses tightly the piece offsets with the inclined plane and can slide along the inclined plane, and when compressing tightly the piece inconsistent with the cell wall in positioning groove, the fly leaf was kept away from the terminal surface edge that compresses tightly the piece and is laminated mutually with another cell wall in positioning groove.

As a further improvement of the utility model, the lower end of the pressing piece is obliquely cut to form a sliding surface attached to the inclined plane.

The utility model has the advantages that: the isolating plate and the movable plate are arranged in the cabinet body and used for isolating the rotating plate and the moving body from the water collecting area respectively, and the circuit, the pusher and the rotating motor are not in contact with water, so that compared with the prior art, the design can avoid the contact of electronic components and parts with water, avoid the failure of the electronic components and parts due to water soaking, simultaneously improve the safety, and the sliding structure between the moving body and the cabinet body cannot rust, thereby being beneficial to the relative motion of the moving body and the cabinet body; the movable plate is replaced in different positioning grooves, so that the detection of valves with different specifications can be met, and the application range is improved; the design of the limiting assembly and the sealing layer can ensure that the movable plate and the cabinet body form sealing, and water in the water collecting area is prevented from leaking; the design of filtering component remedies the defect that there is no filtering structure in the prior art, can avoid impurity entering the water injector and damage the water injector, has also avoided leading to the phenomenon that the liquid pipe takes place to block up.

Drawings

FIG. 1 is a front view of the present invention with the valve clamped;

fig. 2 is a top view of the present invention without clamping the valve;

FIG. 3 is a schematic view at A-A in FIG. 2;

fig. 4 is a split perspective view of the middle movable plate and the limiting component of the present invention.

Reference numerals: 1. a cabinet body; 2. a moving body; 3. rotating the plate; 4. a clamping assembly; 5. a pusher; 6. a rotating electric machine; 7. a water injector; 8. a liquid pipe is communicated; 9. a separator plate; 10. a positioning groove; 11. a movable plate; 12. a limiting component; 13. a water collection area; 14. a filter assembly; 15. a support leg; 16. a partition plate; 17. a filter screen; 18. A venting member; 19. a breather pipe; 20. a sealing layer; 21. a compression member; 22. connecting sheets; 23. fastening a bolt; 24. a slanted plane; 25. a slip surface; 26. a top end filter screen; 27. peripheral filter screen.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. In which like parts are designated by like reference numerals.

Referring to fig. 1 to 4, the valve testing apparatus of the present embodiment includes a cabinet 1 for containing water, a moving body 2 slidably connected to the cabinet 1, a rotating plate 3 rotatably connected to the cabinet 1, two clamping assemblies 4 respectively positioned on the moving body 2 and the rotating plate 3, a pusher 5 for driving the moving body 2 to move, a rotating motor 6 for driving the rotating plate 3 to rotate, a water injector 7 positioned on the rotating plate 3 and communicated with the clamping assemblies 4, and a liquid passing pipe 8 for introducing water in the cabinet 1 into the water injector 7, wherein the liquid passing pipe 8 is deformable, the water injector 7 may be a water pump, and the liquid passing pipe 4 may be a metal corrugated pipe;

based on the prior art, a plurality of sets of positioning grooves 10 are arranged along the length direction of the cabinet body 1, the positioning grooves 10 extend from the upper end surface of the side wall of the cabinet body 1 to the floor of the cabinet body 1 in a radial downward direction, the positioning grooves 10 on two opposite side walls of the cabinet body 1 are in one-to-one correspondence to form a set, a movable plate 11 matched with the positioning grooves 10 is further arranged in the cabinet body 1, the movable plate 11 is arranged close to the moving body 2, a soft sealing layer 20 is arranged on the bottom surface of the movable plate 11, which is attached to the floor of the cabinet body 1, and the part, which is clamped with the positioning grooves 10, of the movable plate 11, the sealing layer 20 can be made of rubber, an isolation plate 9 is arranged in the cabinet body 1, the isolation plate 9 is welded with the two side walls and the floor of the cabinet body 1, the isolation plate 9 is arranged close to the rotating plate 3, the isolation plate 9, a filtering component 14 is arranged at one end of the liquid through pipe 8 extending into the water collecting area 13, and the filtering component 14 can be a filter screen and is arranged at the port of the liquid through pipe 8;

also comprises two limiting components 12 used for pressing the movable plate 11 downwards, the two limiting components 12 are respectively positioned on two opposite side walls of the cabinet body 1, compared with the design that the limiting component 12 is arranged on only one side of the movable plate 11 and can apply force to two sides of the movable plate 11, so that the situation that the sealing performance is affected due to the fact that one end of the movable plate 11 is not tilted when the movable plate 11 is stressed is avoided, the limiting component 12 comprises a pressing piece 21 capable of extending into the positioning groove 10, a connecting piece 22 fixedly connected with the pressing piece 21 and a fastening bolt 23 in threaded connection with the cabinet body 1, the connecting piece 22 and the pressing piece 21 can be integrally formed and located on one side of the pressing piece 21, a through hole through which the fastening bolt 23 penetrates is formed in the connecting piece 22, and the aperture of the through hole is smaller than, bolt holes corresponding to the through holes of the connecting sheets 22 are formed in the cabinet body 1, the bolt holes are positioned on one side of the opening end of the positioning groove 10, and the number of the bolt holes corresponds to the group number of the positioning grooves 10;

the distances from a plurality of sets of positioning grooves 10 to a partition plate 9 are different and correspond to the sizes of valves with different specifications, before the airtightness of the valve is detected, which positioning groove 10 the movable plate 11 is to be clamped with is determined according to the size of the valve to be tested, in the installation process of the movable plate 11, a fastening bolt 23 is separated from the cabinet body 1, a pressing piece 21 is separated from the cabinet body 1, two sides of the movable plate 11 are aligned to the set of positioning grooves 10 and are inserted into the positioning grooves 10, two sides of the movable plate 11 are tightly attached to the positioning grooves 10 through a sealing layer 20 until the bottom of the movable plate 11 is attached to the bottom plate of the cabinet body 1, the pressing piece 21 is arranged above the movable plate 11, a connecting plate 22 is positioned above the side wall of the cabinet body 1, a through hole of the connecting plate 22 corresponds to a threaded hole on the cabinet body 1, the fastening bolt 23 penetrates through the connecting plate 22, and the lower end, then the fastening bolt 23 is rotated to gradually enter the threaded hole, the nut of the fastening bolt 23 is firstly abutted against the connecting sheet 22, then the fastening bolt 23 drives the connecting sheet 22 to move downwards, the connecting sheet 22 drives the pressing piece 21 to move downwards so that the pressing piece 21 pushes the movable plate 11 downwards, the sealing layer 20 is deformed and can be tightly attached to the floor of the cabinet body 1, the installation and the positioning of the movable plate 11 are completed by loosening the fastening bolt 23, the partition plate 9, the movable plate 11 and two opposite side walls of the cabinet body 1 jointly form a water collecting area 13 for receiving the water flowing up and down of the valve, in the process of detecting the air tightness, when the valve is installed in place, the water injector 7 is started, the cabinet body 1 is filtered by the filter assembly 14 under the action of the water injector 7 and then flows through the liquid pipe 8 and the water injector 7 and enters the valve, when the position of the movable plate 11 needs to be changed, the, the clamping assembly 4 comprises a disk abutting against the end part of the valve and three clamping jaws distributed circumferentially, when the valve is installed in place, the distance between the two disks is smaller than the distance between the movable plate 11 and the partition plate 9, the three clamping jaws take the central line of the disk as a reference, one clamping jaw is arranged above the central line and moves in the vertical direction, and the other two clamping jaws are positioned below the central line and take the central line as a symmetrical axis, so that the situation that water flows out of the valve in a parabola shape to a through hole for the clamping jaws to move when the valve is far away from the moving body 2 can be avoided compared with the prior art, and the water is prevented from being blocked and flows into the water collecting area 13;

the rotating plate 3 and the moving body 2 are respectively isolated from the water collecting area 13 through the isolating plate 9 and the movable plate 11, and the circuit 5, the pusher 5 and the rotating motor 6 are not contacted with water, so that compared with the prior art, the design can avoid the contact of electronic components and parts with water, avoid the failure of the electronic components and parts caused by soaking in water, simultaneously improve the safety, and the sliding structure between the moving body 2 and the cabinet body 1 cannot be rusted, thereby being beneficial to the relative motion of the moving body 2 and the cabinet body; the movable plate 11 is replaced in different positioning grooves 10, so that the detection of valves with different specifications can be met, and the application range is improved; the design of the limiting component 12 and the sealing layer 20 can ensure that the movable plate 11 and the cabinet body 1 form a seal, so that water in the water collecting area 13 is prevented from leaking; the design of the filtering component 14 can make up the defect of the prior art that no filtering structure exists, can prevent impurities from entering the water injector 7 to damage the water injector 7, and also can prevent the liquid through pipe 8 from being blocked.

As an improved specific embodiment, referring to fig. 1, the filtering assembly 14 includes a plurality of supporting legs 15, a partition plate 16 and a filtering net 17, the filtering net 17 is formed by splicing a plurality of sub-filtering nets, such as a rectangular parallelepiped with an opening formed by splicing five sub-filtering nets, the partition plate 16 covers the opening of the filtering net 17 to form a purified water chamber, the plurality of supporting legs 15 are arranged and fixed on the bottom plate of the cabinet 1 in a manner of being vertical to the bottom plate of the cabinet 1, and the other ends of the supporting legs are connected with the end surface of the partition plate 16, the filtering net 17 is on the same side or different sides of the supporting legs 15, one end of the liquid through pipe 8 in the water collecting region 13 is connected with the partition plate 16 and is communicated with the chamber, when the valve is positioned by two clamping assemblies 4, the water injector 7 is started and the water in the purified water chamber is guided to the valve through the liquid through pipe 8, the water outside the purified water chamber is filtered and supplemented, compared with the design that a filter screen is covered and arranged at the port of the liquid through pipe 8, the filter screen 17 with different sizes and shapes can be designed according to the requirement, the area of the filter screen 17 is large, the time for completely blocking the filter screen is prolonged, and the time period for maintaining the filter screen is prolonged; under the condition that the water pumping efficiency of the water injector 7 from the water purification cavity is constant, the area of the filter screen 17 is large, the inflow amount of water flowing into the water purification cavity from the cabinet body 1 is increased, the speed of the water flowing through the filter screen 17 is effectively reduced, the pressure of the water on the filter screen 17 is indirectly reduced, the deformation degree of the filter screen 17 is reduced, and the service life of the filter screen 17 is prolonged; the stabilizer blade 15 holds up division board 16 the take the altitude and compares and decide filter screen 17 on the bottom plate of the cabinet body 1 and can avoid the impurity of deposit on the bottom plate of the cabinet body 1 to move along with rivers toward filter screen 17, and division board 16 is closer apart from 1 port of the cabinet body, and the staff of being convenient for maintains.

As an improved specific embodiment, referring to fig. 1 to 2, the present invention further includes an air vent 18 positioned on the cabinet 1, the air vent 18 may adopt an air pump or a rubber ball structure for measuring blood pressure, the air vent 18 is externally connected with an air vent pipe 19, the air vent pipe 19 is fixedly connected to the partition plate 5 and is communicated with the clean water chamber, pressure change in the valve can be observed from an instrument panel of a controller provided with a pressure tester, when it is found that the valve is long in the stage of water injection, which indicates that most of filter holes on the filter screen 17 are blocked, cleaning and maintenance are required at this time, the water injector 7 is closed and the air vent is used to vent the clean water chamber through the air vent 18, gas enters the clean water chamber, the pressure in the clean water chamber becomes high, water and gas both flow toward the filter screen 17 to push impurities on the filter screen 17 away from the filter screen 17, so that the design can clean and maintain the filter screen, the operation is simple and convenient;

further, the port of the vent pipe 19 and the port of the liquid through pipe 8 are sleeved with connecting pieces, the connecting pieces can rotate relative to the ports, external threads are arranged outside the connecting pieces, threaded holes are formed in the partition plates 16, one end, extending into the cabinet body 1, of the vent pipe 19 or the liquid through pipe 8 is aligned with the threaded holes, the connecting pieces can be screwed into the threaded holes by rotating the connecting pieces relative to the vent pipe 19 or the liquid through pipe 8, and therefore the vent pipe 19 or the liquid through pipe 8 is positioned on the partition plates 16, and the vent pipe 19 and the liquid through pipe 8 can be conveniently detached relative to the.

As a specific embodiment of the improvement, referring to fig. 1, the filter screen 17 and the support legs 15 are respectively located on two end surfaces of the partition plate 16, the filter cavity is located above the partition plate 16, the port of the liquid through pipe 8 is located below the purified water cavity, and the natural principle that water flows to the lower part is utilized to facilitate the water injector 7 to introduce water into the valve, the required power of the water injector 7 is reduced, and the partition plate 16 is located below the filter screen 17 to prevent impurities deposited on the bottom plate of the cabinet body 1 from being attracted upwards; filter screen 17 is including being top filter screen 26 and the peripheral filter screen 27 that sets up from top to bottom, peripheral filter screen 27 sets up along division board 16's edge, top filter screen 26 upwards arches and forms the sphere, so the design is compared the filter screen that tiles and can be increased top filter screen 26's area, and water from top to bottom when flowing through top filter screen 26, thereby the sphere form can improve structural strength and slow down the deformation of top filter screen 26, and when not detecting the valve, the external impurity that drops to the internal 1 of cabinet can fall to the bottom plate of the cabinet body 1 along top filter screen 26's sphere, compare and design top filter screen 26 into the horizontal form and can avoid impurity piling up on top filter screen 26.

As a specific embodiment of the improvement, referring to fig. 1, the peripheral filter screen 27 is disposed obliquely outward relative to the partition plate 16, and after the air is introduced into the ventilating member 18, the impurities on the peripheral filter screen 27 are pushed obliquely downward, so that the impurities are moved toward the bottom plate of the cabinet 1, the deposition of the impurities on the bottom plate of the cabinet 1 is accelerated, and the situation that the impurities are attached to the peripheral filter screen 27 is alleviated;

further optimization, because the service lives of the top end filter screen 26 and the peripheral filter screen 27 are different, a top connecting ring and a peripheral connecting ring which can be connected together are respectively arranged at the mutually close ports of the top end filter screen 26 and the peripheral filter screen 27, and the top connecting ring and the peripheral connecting ring can be connected together in a bolt fastening mode; reinforcing ribs may be extended from the top and peripheral attachment rings for increasing the structural strength of both the top filter mesh 26 and the peripheral filter mesh 27.

As an improved specific embodiment, referring to fig. 4, the limiting assembly 12 includes a pressing member 21 capable of extending into the positioning groove 10, a connecting sheet 22 fixedly connected to the pressing member 21, and a fastening bolt 23 in threaded connection with the cabinet body 1, the fastening bolt 23 penetrates through the connecting sheet 22, the pressing member 21 is located above the movable plate 11 and abuts against the movable plate 11, the fastening bolt 23 rotates downward and drives the connecting sheet 22 to move toward the cabinet body 1, and the pressing member 21 presses the movable plate 11 downward under the driving of the connecting sheet 22.

As a modified specific embodiment, referring to fig. 4, an upper end surface of the movable plate 11 is chamfered to form an inclined plane 24, a lower end of the pressing member 21 abuts against the inclined plane 24 and can slide along the inclined plane, when the pressing member 21 abuts against a groove wall of the positioning groove 10, an edge of an end surface of the movable plate 11, which is far away from the pressing member 21, abuts against another groove wall of the positioning groove 10, the design is such that the pressing member 21 generates a downward thrust on the movable plate 11 and a thrust perpendicular to the end surface of the movable plate 11, and the end surface of the movable plate 11 abuts against a side wall of the positioning groove 10 tightly, so as to further improve the sealing performance;

further preferably, the lower end of the pressing piece 21 is chamfered to form a sliding surface 25 attached to the inclined plane 24, so that the wear between the pressing piece 21 and the movable plate 11 can be reduced by using the surface-to-surface relative sliding compared with the edge-to-surface relative sliding, and the service lives of the movable plate 11 and the pressing piece 21 are prolonged.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (10)

1. The utility model provides a valve test equipment, including the cabinet body (1) that is used for flourishing water, with cabinet body (1) sliding connection's removal body (2), change board (3) with cabinet body (1) swivelling joint, two clamping component (4) of being positioned respectively on removal body (2) and commentaries on classics board (3), impeller (5) that are used for driving removal body (2) to remove, be used for driving commentaries on classics board (3) pivoted rotating electrical machines (6), be positioned on changeing board (3) and with water injector (7) of clamping component (4) intercommunication and be used for leading into liquid pipe (8) of water injector (7) with the water in the cabinet body (1), it is deformable to lead to liquid pipe (8), its characterized in that: the inside of the cabinet body (1) is fixedly connected with a separation plate (9), a plurality of groups of positioning grooves (10) are arranged along the length direction of the cabinet body (1), a movable plate (11) matched with the positioning grooves (10) and a limit component (12) for fixing the movable plate (11) in the positioning grooves (10), the isolation plate (9) and the movable plate (11) are sequentially arranged along the direction of the rotating plate (3) towards the moving body (2), the isolation plate (9), the movable plate (11) and two opposite side walls of the cabinet body (1) jointly enclose a water collecting area (13) for receiving the water flowing up and down from the valve, a filtering component (14) is arranged at one end of the liquid through pipe (8) extending into the water collecting area (13), the movable plate (11) is arranged in the positioning grooves (10) at different positions so as to collect water flowing down during detection of valves with different specifications, and the water in the cabinet body (1) flows through the water injector (7) after being filtered by the filtering component (14).

2. The valve testing apparatus of claim 1, wherein: filter component (14) are including a plurality of stand up in stabilizer blade (15) on the cabinet body (1) bottom plate, all division board (16) that link to each other with the one end of a plurality of stabilizer blade (15) and be filter screen (17) of geometry form, a cavity is enclosed into jointly with division board (16) bottom plate in filter screen (17), lead to that one end that liquid pipe (8) are located catchment area (13) is connected with division board (16) and communicates with the cavity.

3. The valve testing apparatus of claim 2, wherein: still including being located ventilation part (18) on the cabinet body (1), ventilation part (18) are external to have breather pipe (19), the part that filter screen (17) and division board (16) enclose communicates with breather pipe (19), breather pipe (19) fixed connection is on division board (16).

4. A valve testing apparatus according to claim 2 or 3, wherein: filter screen (17) and stabilizer blade (15) are located the both ends face of division board (16) respectively, filter screen (17) are including top filter screen (26) and peripheral filter screen (27) that are setting from top to bottom, the edge setting of division board (16) is followed to peripheral filter screen (27), top filter screen (26) arch formation sphere upwards.

5. The valve testing apparatus of claim 4, wherein: the peripheral filter screen (27) is arranged obliquely outwards relative to the partition plate (16).

6. A valve testing device according to claim 1, 2 or 3, wherein: the edge of the movable plate (11) is provided with a soft sealing layer (20) which is used for being attached to the cabinet body (1).

7. The valve testing apparatus of claim 6, wherein: spacing subassembly (12) including can stretch into the interior compressing tightly piece (21) of positioning groove (10), with compressing tightly piece (21) fixed connection's connection piece (22) and with the cabinet body (1) threaded connection's fastening bolt (23), fastening bolt (23) run through connection piece (22), compressing tightly piece (21) and being located fly leaf (11) top and contradict with fly leaf (11), rotate downwards and drive connection piece (22) to the motion of cabinet body (1) through fastening bolt (23), compress tightly piece (21) and push down fly leaf (11) under the drive of connection piece (22).

8. The valve testing apparatus of claim 7, wherein: the number of the limiting assemblies (12) is two and the two limiting assemblies are respectively positioned on two opposite side walls of the cabinet body (1).

9. The valve testing apparatus of claim 8, wherein: the upper end face of the movable plate (11) is obliquely cut to form an inclined plane (24), the lower end of the pressing piece (21) is abutted to the inclined plane (24) and can slide along the inclined plane, and when the pressing piece (21) is abutted to the groove wall of the positioning groove (10), the edge of the end face of the movable plate (11), which is far away from the pressing piece (21), is attached to the other groove wall of the positioning groove (10).

10. The valve testing apparatus of claim 9, wherein: the lower end of the pressing piece (21) is chamfered to form a sliding surface (25) attached to the inclined plane (24).

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