Clamping device suitable for butterfly valve performance test

Abstract

The invention relates to the technical field of butterfly valve detection, and discloses a clamping device suitable for butterfly valve performance test, the clamping device comprises a telescopic assembly, a self-locking assembly is mounted on one side of an output shaft of the output end of the telescopic assembly, the outer side of the output shaft is connected with a clamping assembly through a mounting rack, and a valve to be tested is clamped in the clamping assembly. According to the clamping device suitable for the butterfly valve performance test, the telescopic assembly is used as output force, a long gear drives an upper clamping piece and a lower clamping piece to move together, the upper clamping piece and the lower clamping piece can clamp circles which are located on the same axis and have different diameters, the two kinds of circles correspond to a valve seat wheel disc handle connecting part in a valve to be tested, and therefore the valve seat wheel disc handle connecting part is matched with the valve to be tested. The device is high in practicability, wide in application range and stable in clamping, the clamping positions of valves of different sizes can be adjusted by adjusting the positions, located on one side of the long gear, of the upper clamping piece and the lower clamping piece, and the clamping requirements of butterfly valves of different sizes are further met.

Description

Technical Field

[0001] The present invention relates to the technical field of butterfly valve detection, and particularly to a clamping device suitable for butterfly valve performance testing. Background Art

[0002] A butterfly valve is a valve with a simple structure, mainly composed of a valve body, a valve flap (butterfly plate), a valve stem, and an operating mechanism. By rotating the valve stem to drive the butterfly plate, the butterfly plate rotates around the valve shaft, thereby realizing the opening and closing of the valve. When the butterfly plate is parallel to the pipeline axis, the valve is fully opened and the fluid can flow smoothly; when the butterfly plate is perpendicular to the pipeline axis, the valve is closed to prevent fluid flow. By adjusting the rotation angle of the butterfly plate, the flow rate of the fluid can be controlled.

[0003] Before a butterfly valve is put on the market after production, it needs to be tested. The test items include appearance, such as checking whether the valve appearance is intact, the surface is smooth, without burrs, rust, or missed painting, etc., as well as dimension inspection and sealing performance testing, including airtightness testing (injecting gas into the valve body to detect whether there is gas leakage), liquid tightness testing (performing a similar test using a liquid medium), pressure testing (testing the pressure resistance performance of the valve within a certain pressure range), and leakage rate testing (measuring the leakage rate when the valve is closed), etc., to ensure that the valve can effectively cut off the medium flow and prevent leakage in the closed state, as well as operating force testing, corrosion resistance, wear resistance, and impact resistance testing, etc. These tests usually use a clamping device to position it and avoid the problem that the valve moves due to test impact, making it impossible to detect the valve well. Common clamping devices include three-jaw chucks, pneumatic jaws, etc.

[0004] The prior art with the publication number CN212513594U provides a clamping device suitable for butterfly valve performance testing, including a clamping member. The clamping member includes a sleeve and a bracket. Among them, the sleeves are symmetrically arranged on both sides of the butterfly valve. A number of hole positions are arranged on the outer wall of the sleeve, and the positions of the hole positions are the same as those on the butterfly valve. Fixing rods are arranged in the hole positions. The fixing columns pass through the sleeve and the hole positions of the butterfly valve, and the fixing rods are threadedly connected to the hole positions. A sealing gasket is arranged on the inner wall of the sleeve near the butterfly valve end, and a stepped groove for accommodating the pipeline of the detection device is arranged on the inner wall of the sleeve far from the butterfly valve end, and a sealing ring is arranged on the stepped groove. The bracket is located below the sleeve, and one end of the bracket is integrally connected to the sleeve. By arranging the fixing rods and hole positions on the sleeve, the butterfly valve performance testing can be more stable, the clamping effect is good, at the same time, the sealing performance of the butterfly valve detection can be enhanced, and the operation is simple.

[0005] In the above-mentioned prior art, although the fixing rod penetrates through the fixture and the valve by means of hole position matching for clamping, the applicability of this fixture is relatively low. Because it is required that the hole positions of the fixture and the valve match, it can be seen that it can only clamp one type of valve with the same hole positions and cannot be applied to valves of different sizes, models, and hole positions. The existing butterfly valves have a relatively fixed structure, which are all composed of a disc handle, a worm and worm gear, a valve shaft, a valve body, a valve core, and a valve seat. Generally, the connection part between the valve seat and the disc handle is circular. It is difficult to see a fixture for clamping these two parts in the prior art. In addition, the existing valve detection fixture cannot flexibly adjust the angle, and cannot be flexibly converted for the appearance detection and performance detection in the valve performance test items.

[0006] It can be seen that a clamping device applicable to the performance test of butterfly valves is needed to solve the problems mentioned in the above background technology, that is, the existing valve test fixture has poor practicability, cannot flexibly face valves of different models and the fixture is fixedly installed, and cannot flexibly adjust the angle. Summary of the Invention

[0007] The purpose of the present invention is to provide a clamping device applicable to the performance test of butterfly valves to solve the problems mentioned in the above background technology, that is, the existing valve test fixture has poor practicability, cannot flexibly face valves of different models and the fixture is fixedly installed, and cannot flexibly adjust the angle.

[0008] To solve the above technical problems, the present invention provides the following technical solutions: A clamping device applicable to the performance test of butterfly valves includes a telescopic assembly. A self-locking assembly is installed on one side of the output shaft of the output end of the telescopic assembly, and a clamping assembly is connected to the outside of the output shaft through a mounting bracket. The clamping assembly clamps the valve to be tested, and an angle adjustment assembly is installed behind the telescopic assembly; The clamping assembly includes a long gear, and upper and lower clamping members with the same meshing structure are respectively arranged at both ends on one side of the long gear. The upper and lower clamping members are used to clamp circles with different diameters on the same axis. The lower clamping member includes a long rack and a connecting rack. Side teeth are connected to both sides of the connecting rack, and the two sets of side teeth are respectively meshed with a first side gear and a second side gear. One end of the connecting rack is connected with a clamping block in contact with the base of the valve to be tested. One side of the first side gear is meshed with a first clamping bar on one side of the base, and one side of the second side gear is meshed with a second clamping bar on the other side of the base; The angle adjustment assembly includes a first bevel gear, a second bevel gear, and a third bevel gear that are meshed with each other and are located in three directions. A fourth bevel gear is arranged behind the third bevel gear. A fifth bevel gear is meshed below the fourth bevel gear. A first rear gear and a second rear gear are arranged behind the fourth bevel gear through a connecting shaft and a sleeve, and driving bars meshed with them are respectively arranged below the first rear gear and the second rear gear.

[0009] Preferably, a fixing plate is connected to the output side of the telescopic assembly by bolts, and a fixing plate is also connected to the outer side of the output shaft. The self-locking assembly includes a connecting plate, and the connecting plate is detachably arranged on the fixing plate on the outer side of the output shaft. One side of the connecting plate is rotatably connected to a rotating disc, and an inclined groove and a straight groove are formed in the rotating disc, and the straight groove is located on one side of the inclined groove.

[0010] Preferably, a protruding block is connected to one side of the rotating disc, a hook is connected to one side of the connecting plate above the rotating disc, and the hook is matched with the straight groove.

[0011] Preferably, the fixing plate on the output side of the telescopic assembly is connected to a fixing plate, and a number of groups of limiting grooves are equidistantly formed in the fixing plate, and the fixing plate is located in front of the connecting plate. A number of groups of equidistant hinged baffles are arranged on the top of the fixing plate, and the hinged baffles are installed on a cross plate, and a handle is connected above the cross plate.

[0012] Preferably, mounting brackets are connected to both the upper and lower ends of the outer side of the output shaft. The long gear rotates inside the mounting brackets. An installation frame is arranged on the outer side of the mounting brackets, and a liftable support plate is installed in the installation frame for installing the upper clamping member and the lower clamping member.

[0013] Preferably, teeth meshing with the long gear are arranged on one side of the long rack, and a connecting rack is arranged above the long rack. The first side gear and the second side gear are symmetrically arranged. The first clamping strip and the second clamping strip have the same structure, and the first clamping strip and the second clamping strip both include a shaft portion, a tooth portion and a clamping block portion. The tooth portion is located on one side of the shaft portion, and the tooth portion meshes with the first side gear and the second side gear. The clamping block portion is located at one end of the shaft portion, and the clamping block portion contacts the base of the valve under test.

[0014] Preferably, a screw rod penetrating the installation frame is arranged in the long rack, and a mounting sleeve is arranged on the outer side of the screw rod. The mounting sleeve is located on the outer side of the chute of the installation frame, and the screw rod penetrates the chute and extends to its outer side.

[0015] Preferably, a mounting plate is installed at the tail of the telescopic assembly by bolts, and a first bevel gear is arranged on one side of the mounting plate. A second bevel gear meshing with the first bevel gear is arranged above the first bevel gear, and a third bevel gear meshing with the first bevel gear is arranged on the symmetric plane below the first bevel gear. A shaft is connected inside the fifth bevel gear, and a connecting plate is arranged on the outer side of the shaft below the fifth bevel gear, and one end of the connecting plate is connected to a sleeve, and the sleeve is arranged on the outer side of the telescopic assembly.

[0016] Preferably, brackets are connected to the top end of the second bevel gear and the bottom end of the fifth bevel gear through bearings, and a connecting shaft is connected to one end of the brackets, and the connecting shaft is located on one side of the sleeve.

[0017] Preferably, a mounting seat is arranged on the outer side of the casing. A shaft is connected inside the first rear gear, and the shaft penetrates through the casing and is connected to the fourth bevel gear. A shaft is arranged inside the second rear gear, and the shaft of the second rear gear penetrates through the first rear gear and the casing and is connected to the third bevel gear.

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: First, through the telescopic assembly, clamping assembly, and valve to be tested provided by the present invention, the telescopic assembly is used as the output force, enabling the long gear to drive the upper clamping member and the lower clamping member to move together. The upper clamping member and the lower clamping member will clamp circles with different diameters on the same axis, and the two circles correspond to the connecting parts of the valve seat disc handle in the valve to be tested. The device has strong practicability, a wide range of applications, and firm clamping. For valves of different sizes, the clamping position can be adjusted by adjusting the positions of the upper clamping member and the lower clamping member on one side of the long gear, further meeting the clamping requirements of different sizes of butterfly valves.

[0019] Second, through the angle adjustment assembly provided by the present invention, after clamping, not only performance testing but also appearance inspection need to be carried out. Using the adjustment function of the angle adjustment assembly, the valve to be tested can be flipped and moved, facilitating multi-angle photographing by the appearance inspection device to analyze whether there are damages on the appearance. When performing function testing, since the clamping position is not in the middle, the part used to connect the pipeline is exposed, enabling normal function testing. The fixture realizes the generality between the appearance inspection and function testing of the valve to be tested.

[0020] Third, through the self-locking assembly provided by the present invention, after the output shaft is pushed out, the self-locking assembly on one side can prevent the output shaft from retracting, realizing a certain self-locking function, thus avoiding the loosening of the clamping block. During the function test, the clamping will not become loose due to vibration, further ensuring the normal progress of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a sectional view of the present invention; Figure 3 is a schematic structural diagram of the connection between the telescopic assembly and the mounting frame of the present invention; Figure 4 is a schematic diagram of the disassembled structure of the telescopic assembly and the clamping assembly of the present invention; Figure 5 is a schematic structural diagram of the connection between the telescopic assembly and the clamping assembly of the present invention; Figure 6 is a schematic structural diagram of the clamping assembly in the state of removing the support plate of the present invention; Figure 7 For the present invention Figure 5 Schematic diagram of the structure at position A; Figure 8 Schematic diagram of the self-locking component structure of the present invention; Figure 9 Schematic diagram of the angle adjustment component structure of the present invention; Figure 10 Schematic diagram of the disassembly of the angle adjustment component of the present invention.

[0022] Wherein: 1. Telescopic component; 101. Output shaft; 2. Self-locking component; 201. Connecting plate; 202. Rotating disc; 2021. Oblique groove; 2022. Straight groove; 2023. Protruding block; 203. Hook; 204. Fixed plate; 205. Limiting groove; 206. Hinged baffle; 207. Cross plate; 208. Handle; 3. Clamping component; 301. Installation frame; 302. Installation bracket; 303. Long gear; 304. Upper clamping piece; 305. Lower clamping piece; 3051. Long rack; 3052. Connecting rack; 3053. Side tooth; 3054. Clamping block; 3055. First side gear; 3056. Second side gear; 3057. First clamping strip; 3058. Second clamping strip; 3059. Screw; 4. Valve to be measured; 5. Angle adjustment component; 501. First bevel gear; 502. Second bevel gear; 503. Third bevel gear; 504. Fourth bevel gear; 505. Fifth bevel gear; 506. Connecting shaft; 507. Sleeve; 508. First rear gear; 509. Second rear gear; 510. Driving strip. Detailed implementation manners

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1 ― Figure 8 , a clamping device suitable for butterfly valve performance testing, including a telescopic component 1, and a self-locking component 2 is installed on one side of the output shaft 101 at the output end of the telescopic component 1.

[0025] In this embodiment, the connecting plate 201 is installed on one side of the output shaft 101, and the fixing plate 204 is installed on one side of the fixing plate, forming a static and dynamic state. Therefore, the fixing plate 204 can be used to limit and self-lock the moving protruding block 2023. Since the possible vibrations include water pressure impact and water hammer effect, the protruding block 2023 may face a large pulling force after being stuck in the fixing plate 204. Therefore, it is required that the installation strength of the rotating disc 202 is large and the compressive capacity is strong. The protruding part of the protruding block 2023 is integrally connected to the rotating disc 202. The shape of the limiting groove 205 is similar to a wave, but the slope angle on one side is large and the slope angle on the other side is small. The side with a small angle resists compression to prevent the stuck protruding block 2023 from moving further. When self-locking is triggered and the output shaft 101 needs to be retracted, the protruding block 2023 can be manually lifted, so that the hook 203 is stuck with the straight groove 2022, and then the handle 208 is lifted, and the output shaft 101 can be smoothly retracted.

[0026] Specifically, the output side of the telescopic assembly 1 is connected with a fixing plate through bolts, and the outer side of the output shaft 101 is also connected with a fixing plate. The self-locking assembly 2 includes a connecting plate 201, and the connecting plate 201 is detachably arranged on the fixing plate on the outer side of the output shaft 101. One side of the connecting plate 201 is rotatably connected with a rotating disc 202, and an inclined groove 2021 and a straight groove 2022 are formed in the rotating disc 202, and the straight groove 2022 is located on one side of the inclined groove 2021.

[0027] In this embodiment, the rotating disc 202 can be installed on one side of the connecting plate 201 through a spring rotating shaft. When the hook 203 catches the straight groove 2022, the protruding block 2023 maintains an inclined upward state. After the hook 203 is disengaged from the straight groove 2022, under the action of the spring rotating shaft, the protruding block 2023 rotates and changes from an inclined upward state to an inclined downward state, and the protruding part of the protruding block 2023 is stuck in the limiting groove 205.

[0028] Specifically, a protruding block 2023 is connected to one side of the rotating disc 202, a hook 203 is connected above the rotating disc 202 on one side of the connecting plate 201, and the hook 203 matches the straight groove 2022.

[0029] In this embodiment, the protruding distance of the protruding block 2023 is relatively large, which does not affect during forward movement and will move in the rectangular part above the limiting groove 205. During backward movement, if it tilts downward due to disconnection from the hook 203, it will just fall into the card slot at the wave of the limiting groove 205 to complete the limit. The fixing plate 204 is preferably made of metal as a whole, with strong compressive capacity, and will not deform even when facing the pulling force after the protruding protruding block 2023 is stuck, thus extending the service life.

[0030] Specifically, a fixed plate 204 is connected to the output side of the telescopic assembly 1. A number of groups of limiting grooves 205 are equidistantly formed on the fixed plate 204. The fixed plate 204 is located on the front side of the connecting plate 201. A number of groups of equidistant hinged baffles 206 are arranged on the top of the fixed plate 204. The hinged baffles 206 are installed on the cross plate 207. A handle 208 is connected above the cross plate 207.

[0031] In this embodiment, the inside of the fixed plate 204 is hollow, and a cover plate is provided at the top. The handle 208 passes through the cover plate to drive the cross plate 207 to move upward. A number of groups of hinged baffles 206 below the cross plate 207 are all baffles with angle limits and can only rotate in one direction. When the raised block 2023 moves forward, the hinged baffle 206 rotates. When the raised block 2023 moves backward, the hinged baffle 206 cannot rotate and can only resist the raised block 2023, and the raised block 2023 is toggled to make it rotate.

[0032] Please refer to Figure 1 ― Figure 6 , a clamping device suitable for butterfly valve performance testing. A clamping assembly 3 is connected to the outside of the output shaft 101 through a mounting bracket 302. The clamping assembly 3 clamps a valve to be tested 4. The clamping assembly 3 includes a long gear 303. At both ends on one side of the long gear 303, an upper clamping member 304 and a lower clamping member 305 with the same structure are respectively meshed. The upper clamping member 304 and the lower clamping member 305 are used to clamp circles with different diameters on the same axis. The lower clamping member 305 includes a long rack 3051 and a connecting rack 3052. Side teeth 3053 are connected to both sides of the connecting rack 3052. The two groups of side teeth 3053 are respectively meshed with a first side gear 3055 and a second side gear 3056. One end of the connecting rack 3052 is connected with a clamping block 3054 that contacts the base of the valve to be tested 4. One side of the first side gear 3055 is meshed with a first clamping strip 3057 on one side of the base, and one side of the second side gear 3056 is meshed with a second clamping strip 3058 on the other side of the base.

[0033] In this embodiment, a controller can be installed in the device to control the start of the telescopic assembly 1 and the extension distance of the output shaft 101. The telescopic assembly 1 can be a cylinder, a hydraulic cylinder, an electric cylinder or other devices. After connecting the output power, the output shaft 101 can output. A power input space is reserved at the connection between the telescopic assembly 1 and the angle adjustment assembly 5. For more convenient use, contact sensors can be installed on the clamping blocks of the upper clamping member 304 and the lower clamping member 305. After the contact sensors contact the clamping location, they will give feedback information to the controller, and the controller controls the telescopic assembly 1 to continue to start or stop starting.

[0034] Specifically, mounting brackets 302 are connected to both the upper and lower ends outside the output shaft 101. The long gear 303 rotates inside the mounting bracket 302. An installation frame 301 is provided outside the mounting bracket 302, and a liftable support plate is installed in the installation frame 301 for installing the upper clamping member 304 and the lower clamping member 305.

[0035] In this embodiment, the mounting bracket 302 moves along with the extension of the output shaft 101, driving the long gear 303 to move. At the same time, the long gear 303 can also rotate in the mounting bracket 302, so that the upper clamping members 304 and the lower clamping members 305 of the upper and lower groups can adaptively clamp the clamping part. After one group of clamping, the output shaft 101 will not stop due to the clamping of one group and will continue to move. The movement will cause the remaining clamps to clamp, and the already clamped ones will not be affected. Therefore, with one output power, the upper clamping member 304 and the lower clamping member 305 can clamp circles of different diameters to meet the use requirements. The support plate installed in the installation frame 301 meets the requirements for the lifting and moving of the upper clamping member 304 and the lower clamping member 305. A groove for the movement of the upper clamping member 304 and the lower clamping member 305 is provided on one side, and a round hole is also provided to allow the screw 3059 to pass through. A hole for installing the first side gear 3055 and the second side gear 3056 is also provided, making it convenient to install the parts. Sliders are provided on both sides of the support plate, which can lift and lower in the installation frame 301 following the lifting and lowering of the lower clamping member 305 and the upper clamping member 304. Limiting cavities are also provided at the positions of the first clamping strip 3057 and the second clamping strip 3058 of the support plate for the first clamping strip 3057 and the second clamping strip 3058 to move inside.

[0036] Specifically, teeth meshing with the long gear 303 are provided on one side of the long rack 3051, and a connecting rack 3052 is provided above the long rack 3051. The first side gear 3055 and the second side gear 3056 are symmetrically arranged. The first clamping strip 3057 and the second clamping strip 3058 have the same structure, and both the first clamping strip 3057 and the second clamping strip 3058 include a shaft part, a tooth part, and a clamping block part. The tooth part is located on one side of the shaft part and meshes with the first side gear 3055 and the second side gear 3056. The clamping block part is located at one end of the shaft part, and the clamping block part contacts the base of the valve under test 4.

[0037] In this embodiment, the circles on the upper and lower sides of the valve 4 to be measured are the valve seat and the connecting part of the wheel disc handle respectively. The upper clamping member 304 and the lower clamping member 305 mainly clamp these two parts, and these two parts are usually on the same axis. There may be differences in diameter, but due to volume and aesthetics, the diameters are not too different. The three-sided clamping in this device does not necessarily have to be circular. By adjusting the shape of the clamping block and the contact surface, the rectangular valve seat and the connecting part of the wheel disc handle can also be clamped. Therefore, the first clamping strip 3057, the second clamping strip 3058 of the clamping block 3054 for contacting the valve and the corresponding parts of the upper clamping member 304 can be of a detachable structure, increasing the scope of application.

[0038] Specifically, a screw 3059 is arranged in the long rack 3051 and penetrates through the mounting frame 301. An installation sleeve is arranged on the outer side of the screw 3059. The installation sleeve is located outside the chute of the mounting frame 301, and the screw 3059 penetrates through the chute and extends to its outer side.

[0039] In this embodiment, rotating the screw 3059 will adjust the length of the screw 3059 remaining inside the mounting frame 301 under the action of the installation sleeve, so that the distance between the upper clamping member 304 and the lower clamping member 305 can be adjusted. The tooth parts in the upper clamping member 304 and the lower clamping member 305 move up and down on one side of the long gear 303. This lifting method can also be controlled by an electric push rod or other means.

[0040] Please refer to Figure 1 ― Figure 10 , a clamping device suitable for the performance test of a butterfly valve. An angle adjustment component 5 is installed at the rear side of the telescopic component 1. The angle adjustment component 5 includes a first bevel gear 501, a second bevel gear 502, and a third bevel gear 503 that are meshed with each other and are located in three directions. A fourth bevel gear 504 is arranged at the rear side of the third bevel gear 503. A fifth bevel gear 505 is meshed below the fourth bevel gear 504. A first rear gear 508 and a second rear gear 509 are arranged at the rear side of the fourth bevel gear 504 through a connecting shaft 506 and a sleeve 507. Driving strips 510 meshed with them are respectively arranged below the first rear gear 508 and the second rear gear 509.

[0041] In this embodiment, the angle adjustment assembly 5 controls the telescopic assembly 1, the clamping assembly 3, and the valve under test 4 to perform flipping movement. A space is reserved in the mounting frame 301 where most parts of the clamping assembly 3 are installed for the output shaft 101 to drive the self-locking assembly 2 to flip. The attached drawings do not limit the actual size of the mounting frame 301, and its internal space is sufficient for the clamping assembly 3 to drive the valve under test 4 to flip. When the second rear gear 509 drives the valve under test 4 to flip, the mounting frame 301 will not move. However, when the first rear gear 508 drives the valve under test 4 to displace, the mounting frame 301 needs to move together. Therefore, when installing the device on the working platform, pay attention to reserving a slideway for the mounting frame 301 to move. Sliders can be installed at the bottom of the mounting frame 301 to facilitate cooperation with the slideway for movement. Since the rotation of the telescopic assembly 1 when the first rear gear 508 rotates is centered on the fifth bevel gear 505, the movement trajectory is relatively fixed, and the slideway trajectory reserved on the working table is relatively simple. A groove allowing the screw 3059 to rotate is provided on the outer side of the mounting frame 301. Therefore, both ends of the mounting frame 301 can be set as arc structures to meet the rotation length of the screw 3059, or an arc-shaped slide rail for rotation can be provided on the opening side of the mounting frame 301 to enable the mounting sleeve to move inside the slide rail.

[0042] Specifically, a mounting plate is installed at the tail of the telescopic assembly 1 through bolts, and a first bevel gear 501 is provided on one side of the mounting plate. A second bevel gear 502 meshing with the first bevel gear 501 is provided above the first bevel gear 501. A third bevel gear 503 meshing with the second bevel gear 502 is provided below the second bevel gear 502 and located in the symmetry plane of the first bevel gear 501. A shaft is connected inside the fifth bevel gear 505, and a connecting plate is provided outside the shaft and below the fifth bevel gear 505. One end of the connecting plate is connected with a sleeve, and the sleeve is arranged outside the telescopic assembly 1.

[0043] In this embodiment, when the fourth bevel gear 504 rotates, it will drive the fifth bevel gear 505 to rotate through the meshing relationship, thereby driving the shaft inside the fifth bevel gear 505 to rotate. The connecting plate installed outside the shaft will be driven to rotate, thereby driving the telescopic assembly 1 installed in the sleeve to rotate.

[0044] Specifically, brackets are connected to the top of the second bevel gear 502 and the bottom of the fifth bevel gear 505 through bearings, and one end of the bracket is connected with a connecting shaft 506, and the connecting shaft 506 is located on one side of the sleeve 507.

[0045] In this embodiment, a fixing seat is installed outside the sleeve 507 to fix the device. Bolts can be installed below to connect with the operating table to fix the device.

[0046] Specifically, a mounting base is provided on the outer side of the sleeve 507. A shaft is connected inside the first rear gear 508, and the shaft penetrates through the sleeve 507 and is connected to the fourth bevel gear 504. A shaft is provided inside the second rear gear 509, and the shaft of the second rear gear 509 penetrates through the first rear gear 508 and the sleeve 507 and is connected to the third bevel gear 503.

[0047] In this embodiment, this process is driven by pulling the drive bar 510 that cooperates below the first rear gear 508 and the second rear gear 509. The drive process can also be changed to a worm and worm gear drive. The first rear gear 508 and the second rear gear 509 are correspondingly changed into worms, and the drive bar 510 is changed into a worm. Their relationship is also meshing and has a certain self-locking ability. If it is a gear and rack drive, a ratchet and pawl mechanism can also be added for cooperation to achieve the self-locking function. The drive method can be manual or motor-driven, depending on the on-site requirements.

[0048] When in use, the device is installed on the workbench, and then the device is connected to the valve 4 to be measured. First, determine the clamping position according to the size of the valve 4 to be measured, and correspondingly rotate the upper and lower groups of screws 3059 to adjust the distance between the upper clamping member 304 and the lower clamping member 305. When the upper clamping member 304 and the lower clamping member 305 adjust the height, they move on one side of the long gear 303, and the meshing part remains in the meshing state. After the height adjustment is completed, the telescopic assembly 1 can be started to make the output shaft 101 extend and move forward. The forward movement of the output shaft 101 will drive the long gear 303 to move forward. The teeth of the long rack 3051 and the teeth of the corresponding position of the upper clamping member 304 will remain in the meshing state with the outer teeth of the long gear 303 and move forward together. The movement of the long rack 3051 drives the connecting rack 3052 and the clamping block 3054 to move together. When the diameter of the valve seat below the valve 4 to be measured is larger than the diameter of the connecting part of the upper disc handle, the clamping block 3054 will first contact the valve seat and resist one side of the valve seat. When the connecting rack 3052 moves, the first side gear 3055 and the second side gear 3056 on both sides will also be driven to rotate because of meshing. The first side gear 3055 drives the first clamping bar 3057 to move, and the second side gear 3056 drives the second clamping bar 3058 to move, so as to resist the valve seat from the other two sides respectively. The three sides resist to form clamping. The acting force of the clamping block 3054 resisting the valve seat will cause the connecting rack 3052 and the long rack 3051 to stop moving. When the long rack 3051 stops moving, the telescopic assembly 1 does not stop. The telescopic assembly 1 continues to drive the long gear 303 to move, so that the long gear 303 rotates when moving forward, and continues to drive the upper clamping member 304 to move until the clamping block in the upper clamping member 304 contacts the connecting part of the disc handle, and the same action as the lower clamping member 305 is taken to clamp the connecting part of the disc handle on three sides, completing the clamping process; When the output shaft 101 moves, it drives the rotating disk 202 installed on the connecting plate 201 to move synchronously. The protruding block 2023 at one end of the rotating disk 202 moves along. During the movement, it intermittently contacts the hinged baffle 206 at the top. The installation direction of the hinged baffle 206 is such that it rotates when contacting the forward-moving protruding block 2023, but does not affect the forward movement of the protruding block 2023. When the output shaft 101 stops moving, the protruding block 2023 also stops moving. If there is a pressure shock or water hammer effect in the pipeline when the valve under test 4 is undergoing a function test, the output shaft 101 moves backward due to vibration, and then the protruding block 2023 also moves backward. However, once it moves backward, several groups of hinged baffles 206 at the top cannot rotate in the reverse direction because they contact the protruding block 2023. The protruding block 2023 and the rotating disk 202 are toggled by the hinged baffle 206 to rotate. At this time, the hook 203 disengages from the straight groove 2022. Under the action of the spring shaft, the protruding block 2023 cannot maintain the state of tilting upward and changes from the state of tilting upward to tilting downward. The downward-tilting protruding block 2023 is stuck in the limit groove 205, so that the protruding block 2023 cannot follow the output shaft 101 to move backward, and thus the output shaft 101 cannot move backward. After the test is over, when controlling the recovery of the output shaft 101, the handle 208 can be pulled upward, so that the handle 208 drives the cross plate 207 and the hinged baffle 206 to move upward together, so that the backward-moving protruding block 2023 cannot contact the hinged baffle 206 and can move backward smoothly; When appearance inspection is required, the corresponding driving rack at the rear can be pulled to control the rotation of the first rear gear 508 or the second rear gear 509. When the second rear gear 509 rotates, it drives the third bevel gear 503 to rotate through the shaft inside it. The third bevel gear 503 drives the second bevel gear 502 to rotate through meshing. The second bevel gear 502 drives the first bevel gear 501 to rotate through meshing, thereby driving the telescopic assembly 1 to rotate as a whole, so that the valve under test 4 clamped is flipped, facilitating the taking of valve photos in two directions. When the first rear gear 508 rotates, it drives the fourth bevel gear 504 to rotate through the shaft. The fourth bevel gear 504 drives the fifth bevel gear 505 meshing with it to rotate, so that the fifth bevel gear 505 drives the telescopic assembly 1 to rotate around the fifth bevel gear 505 as the center point through the connecting plate, so that the shooting range is wider and can be combined with the rotation of the third bevel gear 503, thus not restricting the installation position of the shooting device.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A clamping device applicable to the performance test of a butterfly valve, including a telescopic assembly (1), characterized in that: On one side of the output shaft (101) at the output end of the telescopic assembly (1), a self-locking assembly (2) is installed, and a clamping assembly (3) is connected to the outside of the output shaft (101) through a mounting bracket (302). The clamping assembly (3) clamps a valve to be measured (4), and an angle adjustment assembly (5) is installed at the rear side of the telescopic assembly (1). The clamping assembly (3) includes a long gear (303), and upper clamping members (304) and lower clamping members (305) with the same meshing structure are respectively arranged at both ends on one side of the long gear (303). The upper clamping members (304) and the lower clamping members (305) are used to clamp circles with different diameters on the same axis. The lower clamping member (305) includes a long rack (3051) and a connecting rack (3052). Side teeth (3053) are connected to both sides of the connecting rack (3052), and a first side gear (3055) and a second side gear (3056) are respectively meshed with the two groups of side teeth (3053). One end of the connecting rack (3052) is connected to a clamping block (3054) that contacts the base of the valve to be measured (4). The first side gear (3055) is meshed with a first clamping strip (3057) on one side of the base, and the second side gear (3056) is meshed with a second clamping strip (3058) on the other side of the base. The angle adjustment assembly (5) includes a first bevel gear (501), a second bevel gear (502), and a third bevel gear (503) that are meshed with each other and are located in three directions. A fourth bevel gear (504) is arranged at the rear side of the third bevel gear (503). A fifth bevel gear (505) is meshed below the fourth bevel gear (504). A first rear gear (508) and a second rear gear (509) are arranged at the rear side of the fourth bevel gear (504) through a connecting shaft (506) and a sleeve (507). Driving strips (510) that are meshed with them are respectively arranged below the first rear gear (508) and the second rear gear (509).

2. The clamping device applicable to the performance test of a butterfly valve according to claim 1, characterized in that: A fixing plate is connected to the output side of the telescopic assembly (1) through bolts, and the outside of the output shaft (101) is also connected to a fixing plate. The self-locking assembly (2) includes a connecting plate (201), and the connecting plate (201) is detachably arranged on the fixing plate outside the output shaft (101). A rotating disc (202) is rotatably connected to one side of the connecting plate (201), and an inclined slot (2021) and a straight slot (2022) are formed in the rotating disc (202). The straight slot (2022) is located on one side of the inclined slot (2021).

3. The clamping device applicable to butterfly valve performance testing according to claim 2, characterized in that: A raised block (2023) is connected to one side of the rotating disc (202). A hook (203) is connected to one side of the connecting plate (201) above the rotating disc (202), and the hook (203) is matched with the straight slot (2022).

4. The clamping device applicable to the performance test of a butterfly valve according to claim 2, wherein: The fixed plate on the output side of the telescopic assembly (1) is connected with a fixed plate (204), and a number of groups of limit grooves (205) are equidistantly opened on the fixed plate (204). The fixed plate (204) is located on the front side of the connecting plate (201). A number of groups of equidistant hinged baffles (206) are arranged on the top of the fixed plate (204), and the hinged baffles (206) are installed on the cross plate (207). A handle (208) is connected above the cross plate (207).

5. A clamping device applicable to butterfly valve performance testing according to claim 1, characterized in that: Mounting brackets (302) are connected to both the upper and lower ends on the outside of the output shaft (101). The long gear (303) rotates inside the mounting bracket (302). An installation frame (301) is arranged on the outside of the mounting bracket (302), and a liftable support plate is installed in the installation frame (301) for installing the upper clamping member (304) and the lower clamping member (305).

6. The clamping device applicable to the performance test of a butterfly valve according to claim 1, wherein: Teeth meshing with the long gear (303) are arranged on one side of the long rack (3051), and a connecting rack (3052) is arranged above the long rack (3051). The first side gear (3055) and the second side gear (3056) are symmetrically arranged. The first clamping strip (3057) and the second clamping strip (3058) have the same structure, and both the first clamping strip (3057) and the second clamping strip (3058) include a shaft portion, a tooth portion, and a clamping block portion. The tooth portion is located on one side of the shaft portion, and the tooth portion meshes with the first side gear (3055) and the second side gear (3056). The clamping block portion is located at one end of the shaft portion, and the clamping block portion contacts the base of the valve under test (4).

7. The clamping device applicable to the performance test of a butterfly valve according to claim 1, characterized in that: A screw rod (3059) passing through the installation frame (301) is arranged in the long rack (3051), and an installation sleeve is arranged on the outside of the screw rod (3059). The installation sleeve is located outside the chute of the installation frame (301), and the screw rod (3059) passes through the chute and extends to its outside.

8. A clamping device applicable to the performance test of a butterfly valve according to claim 1, characterized in that: An installation plate is installed at the tail of the telescopic assembly (1) through bolts, and a first bevel gear (501) is arranged on one side of the installation plate. A second bevel gear (502) meshing with the first bevel gear (501) is arranged above the first bevel gear (501), and a third bevel gear (503) meshing with the first bevel gear (501) is arranged on the symmetric plane below the second bevel gear (502). A shaft is connected inside the fifth bevel gear (505), and a connecting plate is arranged on the outside of the shaft below the fifth bevel gear (505). One end of the connecting plate is connected with a sleeve, and the sleeve is arranged on the outside of the telescopic assembly (1).

9. The clamping device applicable to butterfly valve performance testing according to claim 8, characterized in that: Bearings are connected to the top end of the second bevel gear (502) and the bottom end of the fifth bevel gear (505) with brackets, and one end of the bracket is connected with a connecting shaft (506). The connecting shaft (506) is located on one side of the sleeve (507).

10. The clamping device applicable to the performance test of a butterfly valve according to claim 1, characterized in that: An installation base is provided on the outer side of the casing (507). A shaft is connected inside the first rear gear (508), and the shaft penetrates through the casing (507) and is connected to the fourth bevel gear (504). A shaft is provided inside the second rear gear (509), and the shaft of the second rear gear (509) penetrates through the first rear gear (508) and the casing (507) and is connected to the third bevel gear (503).

Images