Variable pressure test platform based on valve body sealing detection

Abstract

The invention relates to the technical field of valve body detection, in particular to a variable pressure test platform based on valve body sealing detection, which comprises a test rack, a top support frame I and a top support frame II are fixedly mounted at the top of the test rack, a bearing table is mounted at the top of the test rack and between the top support frame I and the top support frame II, and a dynamic bearing frame is arranged at the top of the bearing table. The dynamic bearing frame is composed of a top plate and two limiting frames, frame grooves are formed in the middles of the limiting frames, two opposite groove walls in the same frame groove are each composed of three transverse walls and two inclined walls, and the frame grooves are matched with the driving rollers with annular grooves. The bearing table is slidably connected with two opposite bases through I-shaped rails symmetrically fixed to the top of the bearing table. Compared with the prior art, the valve body sealing static detection limitation is broken through, the leakage amount is accurately quantified through dynamic pressure transformation and multi-dimensional vibration simulation, and the detection reliability and the working condition coverage range are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve body detection, specifically a variable pressure test platform based on valve body seal detection. Background Technique

[0002] The valve body is the outer shell of the valve, which houses and fixes the internal parts of the valve to ensure the normal operation of the valve during opening and closing. The valve body is usually a hollow tubular or cavity structure, connected to the pipeline at both ends, and internally designed with a passage for fluid to pass through.

[0003] Traditional valve body detection is limited to a static pressure environment and is difficult to fit the actual working conditions. Valves such as high-pressure ball valves and pressure reducing valves often face pressure fluctuations in practice. Traditional fixed-pressure detection cannot reflect the change of seal performance under different pressure gradients and is difficult to identify the seal failure points under extreme pressures, resulting in the lack of reliability and comprehensiveness of the detection results. In terms of dynamic working condition simulation, the actual operation of the valve body is affected by the coupled action of fluid impact and mechanical vibration, while traditional detection methods are mostly static. Even if there is vibration simulation, it is often one-dimensional and non-adjustable, and cannot simulate multi-dimensional vibration and complex alternating stress environments, leading to inaccurate detection of the fatigue life and seal stability of the sealing ring. Summary of the Invention

[0004] The purpose of the present invention is to provide a variable pressure test platform based on valve body seal detection to solve the problems mentioned in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A variable pressure test platform based on valve body seal detection, including a test stand. At the top of the test stand, a top support frame one and a top support frame two are respectively fixedly installed. A bearing platform is installed between the top support frame one and the top support frame two at the top of the test stand, and a dynamic bearing frame is arranged on the top of the bearing platform; The dynamic bearing frame is composed of a top plate and two limit frames. A frame groove is opened in the middle of the limit frame, and both opposite groove walls in the same frame groove are composed of three horizontal walls and two inclined walls. The frame groove is matched with a driving roller with an annular groove.

[0006] Further, the bearing platform is slidably connected with two opposite bases through I-shaped tracks symmetrically fixed on its top. A connecting block is fixedly connected to the top of the opposite base, and a main positioning cylinder and a secondary positioning cylinder are fixedly connected to the same positions on both side walls of the connecting block through supports; A main sliding rod and a secondary sliding rod are respectively slidably connected in the main positioning cylinder and the secondary positioning cylinder. One ends of the main sliding rod and the secondary sliding rod are fixedly connected to the side wall of the same support plate. Compression springs are fixedly connected between the other ends of the main sliding rod and the secondary sliding rod and the inner walls of the main positioning cylinder and the secondary positioning cylinder. A support is installed outside the support plate, and the driving roller is movably connected in the support through a bearing.

[0007] Further, a linkage arm is movably connected to the midpoint position at the top of the carrier table through a bearing. Both ends of the linkage arm are movably connected to a connecting rod through a bearing. The end of the connecting rod away from the linkage arm is rotatably connected to a corresponding opposed base. On the top of the carrier table and on both sides of the linkage arm, a first electric push rod is fixedly installed. The output ends of the two first electric push rods are fixedly connected to the side wall of the same opposed base.

[0008] Further, a swing mechanism is fixedly installed at the center position of the bottom of the top plate. The swing mechanism includes a frame, an eccentric block, and a first motor. The frame is fixedly installed at the center position of the bottom of the top plate. Both sides of the eccentric block are fixedly connected to a rotating shaft, and one end of the rotating shaft is movably connected to the frame through a bearing. The first motor is installed on the side wall of the frame, and the output end of the first motor is fixedly connected to one of the rotating shafts.

[0009] Further, two limiting frames are symmetrically and fixedly installed on both sides of the bottom of the top plate. An arc-shaped clamp for fixing the valve body is installed on the top of the top plate.

[0010] Further, a first sliding plate and a second sliding plate are respectively slidably installed on the tops of the first top support frame and the second top support frame. A first conduit with a bending function and a second conduit are respectively installed on the tops of the first sliding plate and the second sliding plate through corresponding fixing clamps. A cover is connected to the positions where the first conduit and the second conduit are close to the valve body. One end of the first conduit is connected to a water pump through an adjusting mechanism. The adjusting mechanism and the water pump are both installed inside the test stand. A water tank is also installed inside the test stand. A liquid flow meter is installed inside one ends of the first conduit and the second conduit close to the cover.

[0011] Further, the adjusting mechanism includes a semi-circular conduit. The two ends of the semi-circular conduit are respectively connected to the water pump and the first conduit. A circular cover shell is fixedly installed on the top of the first conduit.

[0012] Further, partition plates are movably arranged at equal intervals inside the semi-circular conduit through bearings.

[0013] Further, gears corresponding to the number of partition plates are movably connected to the top of the semi-circular conduit through bearings. A rack meshing with the gear is movably connected to the inside of the circular cover shell through a bearing. The circular cover shell is provided with a driving rail fixedly connected to the top of the rack. An electric push rod is fixedly installed on the top of the circular cover shell. The electric push rod is matched with the driving rail through a convex block fixedly connected to the end.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. The present invention uses variable pressure regulation and dynamic vibration simulation to solve the defect that traditional valve body sealing detection can only be performed under static pressure environment. In terms of variable pressure testing, an electric push rod is used to drive the tooth plate and the gear to control the opening and closing angle of the partition in the semicircular pipe, so as to realize continuous and precise adjustment of the water supply flow, and then simulate the step-type pressure changes and periodic pressure pulsations that the valve body may encounter in actual working conditions. Compared with the traditional fixed pressure detection method, this dynamic variable pressure test can more truly reflect the sealing performance of the valve body under different pressure gradients, and monitor the inlet and outlet flow difference in real time through the liquid flow meter, accurately quantify the leakage amount, and combine the pressure change curve analysis to effectively identify the critical point of sealing failure of the valve body under extreme pressure conditions, significantly improving the reliability and comprehensiveness of the detection results.

[0015] 2. In terms of dynamic vibration simulation, a dual-drive system is used to achieve multi-dimensional vibration of the valve body during the detection process. The motor drives the eccentric block to rotate to generate basic vibration, which is transmitted to the valve body through the top plate to simulate the mechanical vibration of the equipment during operation. At the same time, the electric push rod controls the relative displacement of the opposite base through the linkage arm and the connecting rod mechanism. The driving roller slides between the inclined wall and the transverse wall in the limit frame groove, dynamically adjusting the preload force of the compression spring to achieve continuous adjustment of the vibration amplitude. This composite vibration simulation system can truly reproduce the complex working conditions of the valve body in the pipeline system under the coupling of fluid impact and mechanical vibration, and effectively detect the fatigue life and sealing stability of the sealing ring under alternating stress. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to facilitate understanding by those skilled in the art, the present invention is further described below in conjunction with the accompanying drawings; Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the eccentric block structure in the present invention; Figure 3 It is a schematic diagram of the linkage arm structure in the present invention; Figure 4 It is a schematic diagram of the driving roller structure in the present invention; Figure 5 It is a schematic diagram of the limit frame structure in the present invention; Figure 6 It is a schematic diagram of the round cover structure in the present invention; Figure 7 It is a schematic diagram of the tooth plate structure in the present invention; Figure 8 It is a schematic diagram of the partition structure in the present invention.

[0017] Reference numerals: 1, test stand; 201, first top support frame; 202, second top support frame; 301, main positioning cylinder; 302, auxiliary positioning cylinder; 303, main slide bar; 4, opposing base; 5, I-shaped track; 601, top plate; 602, limiting frame; 603, frame groove; 7, bearing platform; 8, driving roller; 9, toothed plate; 10, gear; 11, linkage arm; 12, connecting rod; 13, first electric push rod; 14, eccentric block; 15, first motor; 16, arc-shaped clamp; 171, first conduit; 172, second conduit; 173, cover; 18, semi-circular pipe; 19, circular cover shell; 20, partition board. Detailed implementation mode

[0018] 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.

[0019] Embodiment 1: As Figures 1-8 shown, a variable-pressure test platform based on valve body seal detection includes a test stand 1. A first top support frame 201 and a second top support frame 202 are respectively fixedly installed at the top of the test stand 1. A bearing platform 7 is installed between the first top support frame 201 and the second top support frame 202 at the top of the test stand 1. A dynamic bearing frame is arranged at the top of the bearing platform 7; The dynamic bearing frame is composed of a top plate 601 and two limiting frames 602. The two limiting frames 602 are symmetrically and fixedly installed on both sides of the bottom of the top plate 601. An arc-shaped clamp 16 for fixing the valve body is installed at the top of the top plate 601. Anti-slip patterns are designed on the inner side of the clamping surface of the arc-shaped clamp 16 to enhance the clamping stability through friction, prevent the valve body from sliding during vibration or pressure testing. The base of the arc-shaped clamp 16 is rigidly connected to the top plate 601 through high-strength bolts, ensuring no displacement deviation when the clamp and the dynamic bearing frame vibrate synchronously, and supporting the quick fixing of valve bodies of various sizes. The anti-slip design makes the clamping force evenly distributed, avoiding local stress damage to the surface of the valve body.

[0020] Sliding plates one and two are respectively installed at the tops of the first top support frame 201 and the second top support frame 202. A first conduit 171 and a second conduit 172 with a bending function are respectively installed at the tops of the sliding plates one and two through corresponding fixed clamps. A cover 173 is connected to the positions where the first conduit 171 and the second conduit 172 are close to the placement of the valve body. One end of the first conduit 171 is connected to a water pump through an adjustment mechanism; The adjusting mechanism and the water pump are both installed inside the test stand 1. A water tank is also installed inside the test stand 1. Liquid flow meters are installed inside one ends of the first conduit 171 and the second conduit 172 close to the cover 173. Through the cooperation of the second conduit 172, the liquid flow meters directly quantify the sealing performance of the valve body. The liquid flow meter in the first conduit 171 indirectly reflects the internal pressure state of the valve body. The liquid flow meter in the first conduit 171 is located upstream of the cover 173 to monitor the water supply flow rate. The liquid flow meter in the second conduit 172 is located downstream of the cover 173 to detect the drainage flow rate in real time for leakage analysis.

[0021] The adjusting mechanism includes a semi-circular pipe 18. Two ends of the semi-circular pipe 18 are respectively communicated with the water pump and the first conduit 171. A circular cover shell 19 is fixedly installed at the top of the first conduit 171. Inside the semi-circular pipe 18, partition plates 20 are movably arranged at equal intervals through bearings. At the top of the semi-circular pipe 18, gears 10 corresponding to the number of partition plates 20 are movably connected through bearings, and the gears 10 are fixedly connected to the partition plates 20. Inside the circular cover shell 19, a toothed plate 9 meshed with the gears 10 is movably connected through a bearing. The circular cover shell 19 is provided with a driving rail fixedly connected to the top of the toothed plate 9. An electric push rod two is fixedly installed at the top of the circular cover shell 19. The electric push rod two is matched with the driving rail through a convex block fixedly connected to the end. Since the partition plate 20 may rotate under the continuous impact of the water flow inside the semi-circular pipe 18, to solve this problem, the electric push rod two cooperating with the driving rail not only controls the rotation angle of the toothed plate 9, but also brakes the toothed plate 9.

[0022] Embodiment 2: A frame groove 603 is formed in the middle of the limit frame 602, and the two opposite groove walls in the same frame groove 603 are both composed of three horizontal walls and two inclined walls. The frame groove 603 is matched with the driving roller 8 with an annular groove. As shown in the figure, limit sleeves are fixedly connected to the side walls of the two limit frames 602, and limit rods are fixedly installed at positions corresponding to the limit sleeves on the top of the bearing platform 7. The limit rods slide inside the limit sleeves, thereby ensuring the stability during the vibration of the dynamic bearing frame.

[0023] Two opposite bases 4 are slidably connected to the bearing platform 7 through I-shaped rails 5 symmetrically fixed to the top thereof. Connecting blocks are fixedly connected to the tops of the opposite bases 4. Main positioning cylinders 301 and auxiliary positioning cylinders 302 are fixedly connected to the same positions on both side walls of the connecting blocks through supports. A main sliding rod 303 and an auxiliary sliding rod are respectively slidably connected inside the main positioning cylinder 301 and the auxiliary positioning cylinder. One ends of the main sliding rod 303 and the auxiliary sliding rod are fixedly connected to the side wall of the same tray. Compression springs are fixedly connected between the other ends of the main sliding rod 303 and the auxiliary sliding rod and the inner walls of the main positioning cylinder 301 and the auxiliary positioning cylinder. A bracket is installed outside the tray. The driving roller 8 is movably connected inside the bracket through a bearing.

[0024] The midpoint position at the top of the bearing platform 7 is movably connected with a linkage arm 11 through a bearing. Both ends of the linkage arm 11 are movably connected with a connecting rod 12 through a bearing. One end of the connecting rod 12 away from the linkage arm 11 is rotatably connected with a corresponding opposed base 4. On the top of the bearing platform 7 and on both sides of the linkage arm 11, electric push rods 13 are fixedly installed. The output ends of the two electric push rods 13 are fixedly connected with the side wall of the same opposed base 4.

[0025] The electric push rod 13 pushes one of the opposed bases 4 to move, and drives the other opposed base 4 to move synchronously through the mutual cooperation of the linkage arm 11 and the connecting rod 12.

[0026] A swing mechanism is fixedly installed at the center position of the bottom of the top plate 601. The swing mechanism includes a frame, an eccentric block 14 and a motor 15. The frame is fixedly installed at the center position of the bottom of the top plate 601. Both sides of the eccentric block 14 are fixedly connected with a rotating shaft, and one end of the rotating shaft is movably connected with the frame through a bearing. The motor 15 is installed on the side wall of the frame, and the output end of the motor 15 is fixedly connected with one of the rotating shafts.

[0027] Since the valve body will vibrate during actual application, in order to improve its effect, the motor 15 is driven to drive the eccentric block 14 to rotate, thereby driving the top plate 601 and the valve body on the top to vibrate as a whole. In order to adjust the vibration effect, the number of eccentric blocks 14 can be appropriately increased or decreased. At the same time, the electric push rod 13 can also be driven. The electric push rod 13 drives one of the opposed bases 4 to slide in the I-shaped track 5, and through the mutual cooperation of the linkage arm 11 and the connecting rod 12, drives the other opposed base 4 to move synchronously and in the opposite direction; During the process that the two opposed bases 4 move synchronously and in the opposite direction, the driving rollers 8 are always sliding in the frame groove 603. It should be explained here that the two opposing groove walls in the frame groove 603 within the same limiting frame 602 are composed of three transverse walls and two inclined walls. When the two opposed bases 4 approach each other, at this time, the two driving rollers 8 on the side walls of the same connecting block gradually move away from the main positioning cylinder 301 under the action of the compression spring, thereby increasing the vibration amplitude of the dynamic bearing frame and the valve body on its top. When the two opposed bases 4 move away from each other, at this time, the two driving rollers 8 on the side walls of the same connecting block gradually approach the main positioning cylinder 301 under the action of the compression spring and squeeze the compression spring, thereby reducing the vibration amplitude of the dynamic bearing frame and the valve body on its top.

[0028] Combining Embodiment 1 and Embodiment 2, the working principle of the present invention: I. Fixing and sealing connection of the valve body Place the valve body to be tested on the top plate 601 of the dynamic bearing frame, and clamp its base through the arc-shaped clamp 16.

[0029] Adjusting bolt: Adapt to different valve body sizes, and the anti-slip pattern enhances the clamping stability to ensure no displacement during vibration.

[0030] Conduit sealed connection: The water supply end of conduit 171 and the drainage end of conduit 172 are connected to the inlet and outlet of the valve body through the cover 173. Sealing measures: A pressure-resistant rubber sealing ring is built into the cover 173, and the conduit interface adopts a double-locking structure to prevent high-pressure leakage.

[0031] II. Start-up of the water supply system and initial pressure setting Start the water pump, and the water flows through the semi-circular pipe 18 into conduit 171 and is injected into the valve body.

[0032] Adjust the angle of the partition plate 20: The electric push rod 2 drives the toothed plate 9 to deflect along the driving rail, drives the gear 10 to rotate, and synchronously adjusts the opening and closing angle of the partition plate 20 in the semi-circular pipe 18. By adjusting the opening and closing degree of the partition plate 20 in the semi-circular pipe 18, the continuous change of the system pressure is realized, and the pressure environment of the valve body under different working conditions is simulated; The liquid flowmeter of conduit 171 monitors the initial water supply flow rate, and by adjusting the angle of the partition plate 20, the flow rate is stabilized to the set value and the corresponding initial pressure.

[0033] The initial reading of the liquid flowmeter of conduit 172 is zero. Verify that there is no leakage in the valve body. If the initial flow rate >, immediately check for sealing faults.

[0034] III. Variable pressure test and leakage dynamic monitoring Step-by-step pressure test: Control the electric push rod 2 to gradually close the partition plate 20. The liquid flowmeter of conduit 171 shows a decrease in flow rate. Maintain the high-pressure state for minutes, and the flowmeter of conduit 172 continuously monitors the leakage amount.

[0035] Continuous pressure fluctuation test: The angle of the partition plate 20 is periodically fine-tuned to simulate the pressure pulsation in the actual working condition.

[0036] IV. Mechanical vibration simulation and composite test The motor 15 drives the eccentric block 14 to rotate to generate centrifugal force, which is transmitted to the top plate 601 through the rotating shaft, causing the valve body to generate periodic vibration. By adjusting the motor speed, the vibration frequency of the valve body is further adjusted.

[0037] Amplitude dynamic adjustment: The electric push rod 13 pushes the opposite base 4 to slide along the I-shaped track 5, and realizes the synchronous reverse movement of the double bases through the linkage arm 11 and the connecting rod 12.

[0038] When the two opposite bases 4 approach, the driving roller 8 slides along the inclined wall of the frame groove 603, and the energy storage of the compression spring decreases, and the vibration amplitude increases; When the two opposite bases 4 move away from each other, the energy storage of the compression spring increases and the vibration amplitude decreases.

[0039] In terms of dynamic vibration simulation, a dual-drive system is adopted to achieve multi-dimensional vibration of the valve body during the detection process. Motor 1 drives the eccentric block 14 to rotate to generate basic vibration, which is transmitted to the valve body through the top plate 601 to simulate the mechanical vibration during equipment operation. At the same time, the electric push rod 13 controls the relative displacement of the opposite base 4 through the linkage arm 11 and the connecting rod 12 mechanism. The driving roller 8 slides between the inclined wall and the transverse wall in the frame groove 603 of the limit frame 602 to dynamically adjust the pre-tightening force of the compression spring, thereby realizing continuous adjustment of the vibration amplitude. This composite vibration simulation system can truly simulate the complex working conditions of the valve body under the coupling action of fluid impact and mechanical vibration in the pipeline system, and effectively detect the fatigue life and sealing stability of the sealing ring under alternating stress.

[0040] In terms of dynamic vibration simulation, a dual-drive system is adopted to achieve multi-dimensional vibration of the valve body during the detection process. Motor 1 drives the eccentric block 14 to rotate to generate basic vibration, which is transmitted to the valve body through the top plate 601 to simulate the mechanical vibration during equipment operation. At the same time, the electric push rod 13 controls the relative displacement of the opposite base 4 through the linkage arm 11 and the connecting rod 12. The driving roller 8 slides between the inclined wall and the transverse wall in the frame groove 603 of the limit frame 602 to dynamically adjust the pre-tightening force of the compression spring, thereby realizing continuous adjustment of the vibration amplitude. This composite vibration simulation system can truly simulate the complex working conditions of the valve body under the coupling action of fluid impact and mechanical vibration in the pipeline system, and effectively detect the fatigue life and sealing stability of the sealing ring under alternating stress.

[0041] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to only the specific implementation manners. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can well understand and utilize the present invention. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A variable pressure test platform based on valve body sealing detection, including a test stand, characterized in that: A top support frame 1 and a top support frame 2 are fixedly installed on the top of the test frame, a bearing platform is installed on the top of the test frame and between the top support frame 1 and the top support frame 2, and a dynamic bearing frame is arranged on the top of the bearing platform; The dynamic bearing frame is composed of a top plate and two limit frames, a frame groove is opened in the middle of the limit frame, and two opposite groove walls in the same frame groove are composed of three transverse walls and two inclined walls, and the frame groove is matched with a driving roller with an annular groove; The bearing platform is slidably connected to two opposing bases through an I-shaped track symmetrically fixed on the top thereof, a connecting block is fixedly connected to the top of the opposing base, and the same positions of the two side walls of the connecting block are fixedly connected to the main positioning cylinder and the auxiliary positioning cylinder through a support; A main slide bar and a secondary slide bar are slidably connected in the main positioning cylinder and the secondary positioning cylinder respectively, one end of the main slide bar and the secondary slide bar are fixedly connected to the same side wall of the support plate, and a compression spring is fixedly connected between the other ends of the main slide bar and the secondary slide bar and the inner wall of the main positioning cylinder and the secondary positioning cylinder, a bracket is installed on the outer side of the support plate, and the driving roller is movably connected in the bracket through a bearing; A swing mechanism is fixedly installed at the bottom center position of the top plate, and the swing mechanism includes a frame, an eccentric block and a motor 1. The frame is fixedly installed at the bottom center position of the top plate, and both sides of the eccentric block are fixedly connected with a rotating shaft, and one end of the rotating shaft is movably connected to the frame through a bearing. The motor 1 is installed on the side wall of the frame, and the output end of the motor 1 is fixedly connected to one of the rotating shafts.

2. The variable pressure test platform based on valve body sealing detection according to claim 1 is characterized in that: A linkage arm is movably connected to the top midpoint of the support platform via a bearing, and connecting rods are movably connected to both ends of the linkage arm via bearings. One end of the connecting rod away from the linkage arm is rotatably connected to a correspondingly arranged opposite base.

3. The variable pressure test platform based on valve body sealing detection according to claim 2 is characterized in that: An electric push rod 1 is fixedly installed on the top of the supporting platform and on both sides of the linkage arm, and the output ends of the two electric push rods 1 are fixedly connected to the same opposite side wall of the base.

4. The variable pressure test platform based on valve body sealing detection according to claim 1 is characterized in that: The two limit frames are symmetrically fixedly installed on both sides of the bottom of the top plate, and an arc-shaped clamp for fixing the valve body is installed on the top of the top plate.

5. The variable pressure test platform based on valve body sealing detection according to claim 1 is characterized in that: Slide plate 1 and slide plate 2 are slidably installed on the top of the top support frame 1 and the top support frame 2, respectively. Conduit 1 and conduit 2 with bending function are installed on the top of the slide plate 1 and the slide plate 2 through corresponding fixed clamps. Conduit 1 and conduit 2 are connected to a cover at a position close to the valve body.

6. The variable pressure test platform based on valve body sealing detection according to claim 5 is characterized in that: One end of the conduit 1 is connected to a water pump through an adjusting mechanism, and the adjusting mechanism and the water pump are both installed inside the test frame. A water tank is also installed inside the test frame. Liquid flow meters are installed inside one end of the conduit 1 and conduit 2 close to the cover.

7. The variable pressure test platform based on valve body sealing detection according to claim 6 is characterized in that: The regulating mechanism comprises a semicircular pipe, two ends of which are respectively connected with a water pump and a conduit 1, and a round cover shell is fixedly installed on the top of the conduit 1.

8. The variable pressure test platform based on valve body sealing detection according to claim 7 is characterized in that: The interior of the semicircular pipe is provided with partitions at equal intervals through bearing movement.

9. The variable pressure test platform based on valve body sealing detection according to claim 7 is characterized in that: The top of the semicircular pipe is movably connected to gears corresponding to the number of partitions through bearings, and the inside of the circular cover shell is movably connected to toothed plates meshing with the gears through bearings.

10. The variable pressure test platform based on valve body sealing detection according to claim 9, characterized in that: The circular cover shell is provided with a driving rail fixedly connected to the top of the tooth plate, and the top of the circular cover shell is fixedly installed with a second electric push rod, which cooperates with the driving rail through a protrusion fixedly connected at the end.

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