Quick valve clamping mechanism of valve pressure testing machine
The integrated valve quick clamping mechanism solves the problems of low efficiency and cumbersome testing process of traditional clamping mechanisms, and realizes efficient and accurate testing of valve sealing performance, improving the convenience and economy of testing equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
In existing valve sealing performance testing, traditional clamping mechanisms are inefficient, difficult to adapt to valves of different specifications, have insufficient clamping stability, are cumbersome in testing procedures, interfere with gas leak detection when detecting liquid leaks, lack self-cleaning function, and affect testing accuracy and efficiency.
A valve quick clamping mechanism was designed. Through the coordinated operation of the worktable, rotating chamber and pushing chamber, the three-jaw chuck clamps the valve flange. It integrates liquid and gas leakage detection mechanisms, adsorption components for self-cleaning, moving components for full-circumference scanning, and airflow detection components for self-cleaning. This enables the detection and self-cleaning of liquid and gas leaks at the same station.
It enables rapid and stable valve clamping, simplifies the testing process, improves testing accuracy and efficiency, reduces component maintenance frequency, and enhances the continuous operation capability of the equipment.
Smart Images
Figure CN121855768A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of testing device technology, specifically to a valve quick clamping mechanism for a valve pressure testing machine. Background Technology
[0002] In valve sealing performance (leakage) testing, the clamping mechanism of the valve testing machine is the core foundation for ensuring testing accuracy. In existing technologies, traditional clamping mechanisms often rely on manual adjustment of the valve angle and clamping position, which is not only inefficient but also difficult to adapt to valve flanges of different specifications, resulting in insufficient clamping stability. This design easily leads to valve displacement or leakage of the test medium during testing, disrupting the stable reference environment required for testing and directly affecting the accuracy of leakage detection results, failing to meet the requirements of efficient and precise testing.
[0003] Furthermore, existing testing equipment often separates liquid leak detection from gas leak detection, requiring valve disassembly and re-clamping, resulting in a cumbersome testing process. It also lacks a dedicated pre-treatment structure for the testing environment. During liquid leak detection, the flow of leaking liquid can easily interfere with sensor signal acquisition, and residual liquid is difficult to clean quickly before gas leak detection, leading to a decrease in the deformation sensitivity of testing components such as flexible membranes. Simultaneously, auxiliary components such as adsorption and cleaning devices used during the testing process are mostly disposable or require manual disassembly and cleaning, lacking self-cleaning and reset functions. Therefore, we propose a valve quick-clamping mechanism for a valve pressure testing machine. Summary of the Invention
[0004] In order to overcome the shortcomings of the prior art and solve at least one of the technical problems mentioned in the background art, the present invention proposes a valve quick clamping mechanism for a valve testing machine.
[0005] The technical solution adopted by this invention to solve its technical problem is: a valve quick clamping mechanism for a valve pressure testing machine, including a worktable, a rotating chamber rotatably connected to the inner side of the worktable via a rotating shaft, a pushing chamber slidably connected to the inner side of the worktable, symmetrical three-jaw chucks provided at the adjacent ends of the rotating chamber and the pushing chamber, a leakage detection mechanism for detecting valve fluid flow provided on the output shaft of the three-jaw chuck, a leakage detection mechanism for detecting valve air leakage provided inside the leakage detection mechanism, a side cylinder installed on one side of the worktable, the output shaft of the side cylinder rotatably connected to the rotating chamber, and a lower cylinder installed inside the worktable, the output shaft of the lower cylinder fixedly connected to the pushing chamber.
[0006] Preferably, the leakage detection mechanism includes a positioning component for movement and positioning, and the leakage detection mechanism also includes a liquid detection component for detecting leakage.
[0007] Preferably, the positioning component includes three arc-shaped locking bars. The front ends of the three arc-shaped locking bars are fixedly connected to the three output claws of the three-jaw chuck via L-shaped connecting plates. An arc-shaped rack is fixedly connected to the rear end of each arc-shaped locking bar. An installation chamber is slidably connected to the outer side of each arc-shaped locking bar. A first motor is installed inside the installation chamber. A first gear is fixedly connected to the output shaft of the first motor. The outer side of the first gear meshes with the arc-shaped rack. Two sets of symmetrical limiting rollers are rotatably connected to the rear end of the installation chamber. The outer side of the limiting rollers is slidably connected to the arc-shaped locking bars.
[0008] Preferably, the liquid detection assembly includes a clamp plate fixedly connected to the mounting chamber, a protective chamber fixedly connected to the rear end of the clamp plate, a second motor installed inside the protective chamber, and two mutually symmetrical sector-shaped toothed plates rotatably connected to the inner side of the clamp plate via a rotating shaft. The teeth of the two sector-shaped toothed plates mesh with each other. The output shaft of the second motor is fixedly connected to one of the two sector-shaped toothed plates. A first connecting rod is fixedly connected to the side of each of the two sector-shaped toothed plates that is far apart from each other. A second connecting rod is rotatably connected to the other end of the first connecting rod. A third connecting rod is rotatably connected to the inner side of the second connecting rod. The other end of the third connecting rod is rotatably connected to the clamp plate.
[0009] Preferably, a detection pin is installed at the upper end of each of the two second connecting rods, and an electrical sensor is installed on the inner side of the detection pin.
[0010] Preferably, the leak detection mechanism includes an airflow detection component for detecting leaks, and the leak detection mechanism also includes an adsorption component for cleaning valve interfaces.
[0011] Preferably, the airflow detection assembly includes two fixed plates, the lower ends of which are respectively fixedly connected to a first connecting rod below. The upper ends of the two fixed plates are rotatably connected to a folding frame via a rotating shaft. A flexible film is disposed inside the folding frame. Two heating rods are slidably connected to the upper end of the folding frame via a sliding groove. An adsorption sweeping plate is disposed on the outer side of the heating rod. A second gear is fixedly connected to the other end of the heating rod. A linear rack is meshed with the outer side of the second gear. The lower ends of the two linear racks are fixedly connected to the folding frame. The airflow detection assembly also includes a grating sensor mounted on the upper end of the clamping plate.
[0012] Preferably, one side of the folding frame is rotatably connected to two first pulleys via a pivot. A partition is provided on the outer side of the first pulleys. The outer sides of the two first pulleys are rotatably connected to a first synchronous belt. The upper end of the first synchronous belt is fixedly connected to two heating rods via two locking blocks. A third motor is installed at the lower end of the folding frame. The output shaft of the third motor is fixedly connected to a second pulley. The outer side of the second pulley is rotatably connected to a second synchronous belt. The inner side of the second synchronous belt is rotatably connected to one of the two first pulleys.
[0013] Preferably, the adsorption assembly includes two electrically operated telescopic rods, which are respectively disposed on both sides of the installation chamber. The output shaft of each electrically operated telescopic rod is rotatably connected to a fourth connecting rod. One end of the fourth connecting rod is rotatably connected to a clamping plate, and the other end of the fourth connecting rod is rotatably connected to a fixed rotating shaft. A sleeve is rotatably connected to the outer side of the fixed rotating shaft, and a guide rail is fixedly connected to the outer side of the sleeve. A push rod is slidably connected to the inner side of the guide rail, and an arc-shaped push plate is fixedly connected to the other end of the push rod. A folded adsorption strip is provided on the outer side of multiple arc-shaped push plates.
[0014] Preferably, a fourth motor is installed on one side of one of the multiple guide rails. The output shaft of the fourth motor is fixedly connected to a third gear. The outer side of the third gear is meshed with a fourth gear. The inner side of the fourth gear is rotatably connected to a fixed rotating shaft. Multiple inclined grooves are provided on the outer side of the fourth gear. A push shaft is slidably connected in the inclined groove of the fourth gear. The front ends of the multiple push shafts are fixedly connected to the corresponding push rods.
[0015] Compared with the prior art, the present invention provides a valve quick clamping mechanism for a valve pressure testing machine, which has the following beneficial effects: 1. This invention utilizes the coordinated operation of a worktable, a rotating chamber, and a pushing chamber. A lower cylinder drives the pushing chamber to approach the rotating chamber, while a side cylinder flexibly adjusts the angle of the rotating chamber, achieving rapid alignment of both ends of the valve with the clamping surface. Then, the output claws of a three-jaw chuck clamp the valve flange end, simultaneously driving three arc-shaped clamping strips to form a closed circular track. This not only completes the sealing and clamping positioning of the valve but also provides a stable benchmark for subsequent testing. This clamping method eliminates the need for repeated manual calibration, significantly improving clamping efficiency. It is adaptable to valve flanges of different specifications, offers strong clamping stability, and effectively avoids the impact of valve displacement or media leakage on the test results during the testing process.
[0016] 2. This invention integrates a liquid leakage detection mechanism with a gas leakage detection mechanism, enabling both liquid and gas leak detection to be completed at the same clamping station without the need for valve disassembly and secondary clamping, significantly simplifying the detection process. During liquid leakage detection, the folded adsorption strips of the adsorption component pre-adsorb residual leaking liquid from the gaps, preventing liquid flow from interfering with the electrical sensor signal acquisition. Combined with the full-circumference scanning of the moving component, the leak point is accurately located. Before gas leak detection, the heating rod drives the adsorption scanning plate to rotate and clean the moisture on the surface of the flexible film, ensuring the film's deformation sensitivity. Then, the grating sensor detects the bulging position to locate the gas leak point. Both detection modes have anti-interference designs, and the detection accuracy and comprehensiveness are significantly better than existing single detection solutions.
[0017] 3. The moving component provides a full-circumference trajectory for liquid leakage detection and also drives the flexible membrane for gas leakage detection to complete a full-circumference scan. The adsorption component achieves position adjustment through an electric telescopic rod, and the folded adsorption strip achieves self-cleaning and resetting through a gear driven by a fourth motor and a sloped slide structure, restoring adsorption capacity without manual disassembly and cleaning. The heating rod of the airflow detection component achieves movement and rotation through belt drive and gear rack meshing, simultaneously cleaning moisture from the flexible membrane. The linkage design of each component reduces the need for independent drive units, and the core auxiliary components all have self-cleaning or resetting functions, reducing the frequency of component replacement and maintenance, improving the continuous operation capability of the equipment, and significantly improving ease of use and economy. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a schematic diagram of the overall structure of the liquid leakage detection mechanism and the gas leakage detection mechanism of the present invention. Figure 1 ; Figure 4 This is a schematic diagram of the overall structure of the liquid leakage detection mechanism and the gas leakage detection mechanism of the present invention. Figure 2 ; Figure 5 This is an enlarged schematic diagram of a portion of the positioning component of the present invention; Figure 6 This is a cross-sectional schematic diagram of a portion of the positioning component of the present invention; Figure 7 This is a cross-sectional schematic diagram of the overall structure of the liquid detection component of the present invention; Figure 8 This is a schematic diagram of the overall structure of the airflow detection component of the present invention; Figure 9 This is an enlarged schematic diagram of a portion of the airflow detection component of the present invention; Figure 10 This is a schematic diagram of the overall structure of the adsorption component of the present invention; Figure 11 This is a cross-sectional schematic diagram of a portion of the adsorption component of the present invention.
[0019] In the diagram: 1. Workbench; 2. Rotating chamber; 3. Pushing chamber; 4. Three-jaw chuck; 5. Leakage detection mechanism; 51. Positioning component; 511. Arc-shaped clamping strip; 512. Arc-shaped rack; 513. Installation chamber; 514. First motor; 515. First gear; 516. Limiting roller; 52. Liquid detection component; 521. Clamping plate; 522. Protective chamber; 523. Second motor; 524. Sector-shaped gear plate; 525. First connecting rod; 526. Second connecting rod; 527. Third connecting rod; 528. Detection pin; 6. Air leakage detection mechanism; 61. Airflow detection component; 611. Fixing plate; 612. Folding frame; 613. Flexible film; 614. First pulley; 615. First synchronous belt; 616. Heating rod; 617. Adsorption sweeping plate; 618. Second gear; 619. Linear rack; 6110. Third motor; 6111. Second pulley; 6112. Second synchronous belt; 6113. Grating sensor; 62. Adsorption assembly; 621. Electric telescopic rod; 622. Fourth connecting rod; 623. Fixed rotating shaft; 624. Sleeve; 625. Guide rail; 626. Push rod; 627. Arc-shaped push plate; 628. Folded adsorption strip; 629. Fourth motor; 6210. Third gear; 6211. Fourth gear; 6212. Push shaft; 7. Side cylinder; 8. Lower cylinder. Detailed Implementation
[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
[0021] The following electrical components are all electrically connected via an external PLC controller.
[0022] Please see Figures 1-11 A valve quick clamping mechanism for a valve testing machine includes a worktable 1. A rotating chamber 2 is rotatably connected to the inner side of the worktable 1 via a rotating shaft. A pushing chamber 3 is slidably connected to the inner side of the worktable 1. A symmetrical three-jaw chuck 4 is provided at the adjacent ends of the rotating chamber 2 and the pushing chamber 3. A leakage detection mechanism 5 for detecting valve fluid flow is provided on the output shaft of the three-jaw chuck 4. A leakage detection mechanism 6 for detecting valve air leakage is provided inside the leakage detection mechanism 5. A side cylinder 7 is installed on one side of the worktable 1. The output shaft of the side cylinder 7 is rotatably connected to the rotating chamber 2. A lower cylinder 8 is installed inside the worktable 1. The output shaft of the lower cylinder 8 is fixedly connected to the pushing chamber 3.
[0023] In this embodiment, the leakage detection mechanism 5 includes a positioning component 51 for movement and positioning, and the leakage detection mechanism 5 also includes a liquid detection component 52 for detecting leakage.
[0024] Specifically, the positioning component 51 provides a full-circuit positioning trajectory for the leakage detection component, and the liquid detection component 52 enables accurate detection of valve leakage and identification of the leakage point.
[0025] In this embodiment, the positioning component 51 includes three arc-shaped locking bars 511. The front ends of the three arc-shaped locking bars 511 are fixedly connected to the three output claws of the three-jaw chuck 4 via L-shaped connecting plates. The rear ends of the arc-shaped locking bars 511 are fixedly connected to an arc-shaped rack 512. An installation chamber 513 is slidably connected to the outer side of the arc-shaped locking bars 511. A first motor 514 is installed on the inner side of the installation chamber 513. A first gear 515 is fixedly connected to the output shaft of the first motor 514. The outer side of the first gear 515 is meshed with the arc-shaped rack 512. Two sets of symmetrical limiting rollers 516 are rotatably connected to the rear end of the installation chamber 513. The outer side of the limiting rollers 516 is slidably connected to the arc-shaped locking bars 511.
[0026] Specifically, the arc-shaped locking strip 511 is used to connect with the output claw of the three-jaw chuck 4 to form a closed circular track; the L-shaped connecting plate connects the arc-shaped locking strip 511 with the output claw of the three-jaw chuck 4; the arc-shaped rack 512 meshes with the first gear 515 to provide a transmission gear for the movement of the installation chamber 513; the installation chamber 513 carries the relevant components of the leakage detection mechanism 5; the first motor 514 provides power for the circumferential movement of the installation chamber 513; the first gear 515 meshes with the arc-shaped rack 512 to transmit power; and the limiting roller 516 provides guidance for the movement of the installation chamber 513 and prevents it from falling off.
[0027] In this embodiment, the liquid detection component 52 includes a clamping plate 521 fixedly connected to the mounting chamber 513. A protective chamber 522 is fixedly connected to the rear end of the clamping plate 521. A second motor 523 is installed inside the protective chamber 522. Two mutually symmetrical sector-shaped toothed plates 524 are rotatably connected to the inner side of the clamping plate 521 via a rotating shaft. The teeth of the two sector-shaped toothed plates 524 mesh with each other. The output shaft of the second motor 523 is fixedly connected to one of the two sector-shaped toothed plates 524. A first connecting rod 525 is fixedly connected to the side of the two sector-shaped toothed plates 524 that are far apart. A second connecting rod 526 is rotatably connected to the other end of the first connecting rod 525. A third connecting rod 527 is rotatably connected to the inner side of the second connecting rod 526. The other end of the third connecting rod 527 is rotatably connected to the clamping plate 521.
[0028] Specifically, the clamping plate 521 serves to support the relevant components of the liquid detection assembly 52; the protective chamber 522 serves to protect the second motor 523; the second motor 523 serves to provide power for the rotation of the sector toothed plate 524; the sector toothed plate 524 serves to achieve synchronous counter-rotation through mutual meshing; the first connecting rod 525 serves to transmit the power of the sector toothed plate 524; the second connecting rod 526 serves to connect the first connecting rod 525 and the third connecting rod 527, transmitting the motion trajectory; the third connecting rod 527 serves to cooperate with the clamping plate 521 to constrain the motion trajectory of the second connecting rod 526.
[0029] In this embodiment, a detection pin 528 is installed at the upper end of each of the two second connecting rods 526, and an electrical sensor is installed on the inner side of the detection pin 528.
[0030] Specifically, the function of the detection pin 528 is to fit the gap between the valve and the clamping surface; the function of the sensor is to collect the electrical signal of the leaking liquid in real time, so as to achieve the initial identification of the leak point.
[0031] In this embodiment, the leak detection mechanism 6 includes an airflow detection component 61 for detecting leaks, and the leak detection mechanism 6 also includes an adsorption component 62 for cleaning valve interfaces.
[0032] Specifically, the function of the airflow detection component 61 is to detect valve leakage and locate the leak point; the function of the adsorption component 62 is to clean the residual liquid at the valve interface and complete the pretreatment of the test environment.
[0033] In this embodiment, the airflow detection component 61 includes two fixing plates 611. The lower ends of the two fixing plates 611 are fixedly connected to the first connecting rod 525 below. The upper ends of the two fixing plates 611 are rotatably connected to a folding frame 612 through a rotating shaft. A flexible film 613 is provided inside the folding frame 612. Two heating rods 616 are slidably connected to the upper end of the folding frame 612 through a sliding groove. An adsorption sweeping plate 617 is provided on the outer side of the heating rods 616. A second gear 618 is fixedly connected to the other end of the heating rods 616. A linear rack 619 is meshed on the outer side of the second gear 618. The lower ends of the two linear racks 619 are fixedly connected to the folding frame 612. The airflow detection component 61 also includes a grating sensor 6113 installed on the upper end of the clamping plate 521.
[0034] Specifically, the function of the fixing plate 611 is to connect the first connecting rod 525 and the folding frame 612; the function of the folding frame 612 is to support the flexible film 613 and to be unfolded and laid flat; the function of the flexible film 613 is to provide feedback on the location of the leak through deformation driven by airflow; the function of the heating rod 616 is to heat the adsorption sweeping plate 617 and to achieve rotation in conjunction with the gear rack; the function of the adsorption sweeping plate 617 is to clean the residual moisture on the surface of the flexible film 613; the function of the second gear 618 is to mesh with the linear rack 619 to make the heating rod 616 rotate during movement; the function of the linear rack 619 is to provide the rotational toothed track in conjunction with the second gear 618; the function of the grating sensor 6113 is to detect the bulging position of the flexible film 613 and locate the leak point.
[0035] In this embodiment, one side of the folding frame 612 is rotatably connected to two first pulleys 614 via a pivot. A partition is provided on the outer side of the first pulleys 614. The outer sides of the two first pulleys 614 are rotatably connected to a first synchronous belt 615. The upper end of the first synchronous belt 615 is fixedly connected to two heating rods 616 via two locking blocks. A third motor 6110 is installed at the lower end of the folding frame 612. The output shaft of the third motor 6110 is fixedly connected to a second pulley 6111. The outer side of the second pulley 6111 is rotatably connected to a second synchronous belt 6112. The inner side of the second synchronous belt 6112 is rotatably connected to one of the two first pulleys 614.
[0036] Specifically, the function of the first pulley 614 is to transmit power in conjunction with the first synchronous belt 615; the function of the partition is to separate the two first pulleys 614 to avoid motion interference; the function of the first synchronous belt 615 is to connect the two first pulleys 614 and drive the heating rod 616 to move; the function of the locking block is to fix the first synchronous belt 615 and the heating rod 616; the function of the third motor 6110 is to provide power for the movement of the heating rod 616; the function of the second pulley 6111 is to transmit power in conjunction with the second synchronous belt 6112; the function of the second synchronous belt 6112 is to connect the second pulley 6111 and the first pulley 614 to transmit power.
[0037] In this embodiment, the adsorption assembly 62 includes two electric telescopic rods 621, which are respectively arranged on both sides of the installation chamber 513. The output shaft of the electric telescopic rod 621 is rotatably connected to a fourth connecting rod 622. One end of the fourth connecting rod 622 is rotatably connected to the clamping plate 521, and the other end of the fourth connecting rod 622 is rotatably connected to a fixed rotating shaft 623. A sleeve 624 is rotatably connected to the outside of the fixed rotating shaft 623. A guide rail 625 is fixedly connected to the outside of the sleeve 624. A push rod 626 is slidably connected to the inside of the guide rail 625. An arc-shaped push plate 627 is fixedly connected to the other end of the push rod 626. A folded adsorption strip 628 is provided on the outer side of multiple arc-shaped push plates 627.
[0038] Specifically, the electric telescopic rod 621 provides power for the movement of the adsorption assembly 62; the fourth connecting rod 622 transmits the power of the electric telescopic rod 621, causing the adsorption assembly 62 to deflect; the fixed rotating shaft 623 supports the sleeve 624; the sleeve 624 connects the fixed rotating shaft 623 to the guide rail 625; the guide rail 625 provides sliding guidance for the push rod 626; the push rod 626 moves the arc-shaped push plate 627; the arc-shaped push plate 627 retracts or unfolds the folded adsorption strip 628; the folded adsorption strip 628 fits into the valve gap and adsorbs residual leaked liquid.
[0039] In this embodiment, a fourth motor 629 is installed on one side of one of the multiple guide rails 625. The output shaft of the fourth motor 629 is fixedly connected to a third gear 6210. The outer side of the third gear 6210 is meshed with a fourth gear 6211. The inner side of the fourth gear 6211 is rotatably connected to a fixed rotating shaft 623. Multiple inclined sliding grooves are provided on the outer side of the fourth gear 6211. A push shaft 6212 is slidably connected in the inclined sliding groove of the fourth gear 6211. The front ends of the multiple push shafts 6212 are fixedly connected to the corresponding push rods 626.
[0040] Specifically, the function of the fourth motor 629 is to provide power for the retraction of the folding adsorption strip 628; the function of the third gear 6210 is to mesh with the fourth gear 6211 to transmit power; the function of the fourth gear 6211 is to push the push shaft 6212 to move through the inclined slide groove; the function of the inclined slide groove is to guide the movement direction of the push shaft 6212; the function of the push shaft 6212 is to drive the push rod 626 to slide along the guide rail 625.
[0041] Working principle: During use, the valve to be tested is placed on the test position of the workbench 1 using the hoisting equipment. The lower cylinder 8 is activated to drive the push chamber 3 towards the rotating chamber 2. The angle of the rotating chamber 2 is adjusted by the side cylinder 7 so that both ends of the valve are aligned with the positioning surfaces of the push chamber 3 and the rotating chamber 2, and finally the valve is clamped between the two. Then, the three-jaw chuck 4 is activated, and its output jaws clamp the valve flange end, completing the sealing clamping and positioning of the valve, providing a stable test benchmark for subsequent leakage detection. When the output claws of the two three-jaw chucks 4 clamp the valve, they simultaneously drive the three arc-shaped clamping bars 511 to move closer to the valve axis and splice together, so that the arc-shaped clamping bars 511 and the arc-shaped rack 512 together form a closed circular track, defining the detection area at both ends of the valve; this structure provides a continuous and closed-loop motion trajectory for the circumferential scanning action of the subsequent detection components, ensuring that the detection covers the entire circumference of the valve end face; Test liquid is introduced into the valve cavity through an external pipeline. If there is a gap at the fit between the valve and the clamping surface, the leaking liquid will flow along the valve end face. At this time, the second motor 523 in the protection chamber 522 is activated. Its output shaft drives one of the sector tooth plates 524 to rotate. Through the meshing transmission of the two sector tooth plates 524, the synchronous opposite deflection of the two sector tooth plates 524 is achieved. The sector tooth plate 524 drives the second connecting rod 526 to rotate. The second connecting rod 526 drives the third connecting rod 527 to rotate. The third connecting rod 527 rotates around the pivot connected to the clamping plate 521. Thus, the first connecting rod 525 and the third connecting rod 527 generate a planar connecting rod transmission, which drives the detection pin 528 to approach and fit tightly against the valve fit gap. The sensor built into the detection pin 528 can collect the electrical signal of the leaking liquid in real time, realizing the preliminary identification of the leak point. Since the flow of leaking liquid can cause sensor signal distortion and liquid residue may damage the detection components, the electric telescopic rods 621 on both sides of the installation chamber 513 are activated: their output shaft drives the fourth connecting rod 622 to deflect around the rotating shaft connected to the clamping plate 521, which drives the adsorption assembly 62 to move towards the valve fitting gap, so that the folded adsorption strip 628 fits tightly against the gap area, adsorbs the residual leaking liquid, completes the pretreatment of the test environment, and ensures the accuracy of subsequent detection. The first motor 514 is started, and its output shaft drives the first gear 515 to rotate. Through the meshing transmission between the first gear 515 and the arc-shaped rack 512, the installation chamber 513 is driven to move in a circular motion along a closed circular track. The sliding engagement between the limiting roller 516 and the arc-shaped retaining strip 511 provides guidance for the installation chamber 513 and prevents it from falling off. During this process, the folded adsorption strip 628 first adsorbs the leakage liquid in the entire circumferential gap, and the detection pin 528 moves synchronously between the two folded adsorption strips 628 to avoid interference from the flow of leakage liquid and achieve precise positioning of the leakage point at the valve's full circumferential contact. Once the folded adsorption strip 628 is saturated with adsorption, the fourth motor 629 is activated: its output shaft drives the third gear 6210 to rotate, and through the meshing transmission between the third gear 6210 and the fourth gear 6211, the fourth gear 6211 rotates around the fixed rotating shaft 623; the inclined groove of the fourth gear 6211 pushes the push shaft 6212 to move along the guide rail 625, causing the push rod 626 and the arc-shaped push plate 627 to retract, causing the folded adsorption strip 628 to squeeze out water. Then the push rod 626 resets, and the folded adsorption strip 628 restores its adsorption capacity, ensuring the feasibility of continuous testing; After completing the liquid leak detection, the first connecting rod 525 remains open. The fixed plate 611 drives the folding frame 612 to unfold, causing the flexible film 613 to lay flat on the outer side of the valve end face. The third motor 6110 is started, its output shaft driving the second pulley 6111 to rotate. This, in turn, drives the first pulley 614 and the first synchronous belt 615 to rotate via the second synchronous belt 6112, thereby causing the heating rod 616 to move along the flexible film 613. Simultaneously, the second gear 618 on the outer side of the heating rod 616 meshes with the linear rack 619. The heating rod 616 rotates during movement, and the adsorption sweeping plate 617 on its outer side cleans the residual moisture on the surface of the flexible film 613 after heating, keeping the film dry to ensure deformation sensitivity. Then, the positioning component 51 drives the flexible film 613 to move around the entire circumference and introduces test gas into the valve cavity. If there is a gas leak, the leaking airflow will push the flexible film 613 at the corresponding position to bulge downwards. The grating sensor 6113 at the upper end of the clamping plate 521 detects the bulging position of the flexible film 613 in real time to locate the gas leak point. By integrating the location data of liquid and gas leak points, a comprehensive assessment of the sealing performance at the valve's two ends can be achieved, providing precise location data for valve sealing maintenance.
[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A valve quick clamping mechanism for a valve testing machine, comprising a worktable (1), characterized in that: The inner side of the workbench (1) is rotatably connected to a rotating chamber (2) via a rotating shaft. The inner side of the workbench (1) is slidably connected to a pushing chamber (3). The rotating chamber (2) and the pushing chamber (3) are each provided with a symmetrical three-jaw chuck (4) at their respective ends. The output shaft of the three-jaw chuck (4) is provided with a leakage detection mechanism (5) for detecting valve liquid flow. The inner side of the leakage detection mechanism (5) is provided with a leakage detection mechanism (6) for detecting valve air leakage. A side cylinder (7) is installed on one side of the workbench (1). The output shaft of the side cylinder (7) is rotatably connected to the rotating chamber (2). A lower cylinder (8) is installed inside the workbench (1). The output shaft of the lower cylinder (8) is fixedly connected to the pushing chamber (3).
2. The valve quick clamping mechanism of a valve testing machine according to claim 1, characterized in that: The leakage detection mechanism (5) includes a positioning component (51) for moving and positioning, and the leakage detection mechanism (5) also includes a liquid detection component (52) for detecting leakage.
3. The valve quick clamping mechanism of a valve testing machine according to claim 2, characterized in that: The positioning component (51) includes three arc-shaped locking strips (511). The front ends of the three arc-shaped locking strips (511) are fixedly connected to the three output claws of the three-jaw chuck (4) through L-shaped connecting plates. The rear ends of the arc-shaped locking strips (511) are fixedly connected to an arc-shaped rack (512). The outer side of the arc-shaped locking strips (511) is slidably connected to an installation chamber (513). The inner side of the installation chamber (513) is equipped with a first motor (514). The output shaft of the first motor (514) is fixedly connected to a first gear (515). The outer side of the first gear (515) meshes with the arc-shaped rack (512). The rear end of the installation chamber (513) is rotatably connected to two sets of symmetrical limiting rollers (516). The outer side of the limiting rollers (516) is slidably connected to the arc-shaped locking strips (511).
4. The valve quick clamping mechanism of a valve testing machine according to claim 2, characterized in that: The liquid detection assembly (52) includes a clamping plate (521) fixedly connected to the mounting chamber (513). A protective chamber (522) is fixedly connected to the rear end of the clamping plate (521). A second motor (523) is installed inside the protective chamber (522). Two mutually symmetrical sector toothed plates (524) are rotatably connected to the inner side of the clamping plate (521) via a rotating shaft. The teeth of the two sector toothed plates (524) mesh with each other. The output shaft of the second motor (523) is fixedly connected to one of the two sector toothed plates (524). A first connecting rod (525) is fixedly connected to the side of the two sector toothed plates (524) that are far apart. A second connecting rod (526) is rotatably connected to the other end of the first connecting rod (525). A third connecting rod (527) is rotatably connected to the inner side of the second connecting rod (526). The other end of the third connecting rod (527) is rotatably connected to the clamping plate (521).
5. The valve quick clamping mechanism of a valve testing machine according to claim 4, characterized in that: Both of the second connecting rods (526) are equipped with detection pins (528) at their upper ends, and electrical sensors are installed on the inner side of the detection pins (528).
6. The valve quick clamping mechanism of a valve testing machine according to claim 1, characterized in that: The leak detection mechanism (6) includes an airflow detection component (61) for detecting leaks, and the leak detection mechanism (6) also includes an adsorption component (62) for cleaning valve interfaces.
7. The valve quick clamping mechanism of a valve testing machine according to claim 6, characterized in that: The airflow detection assembly (61) includes two fixed plates (611). The lower ends of the two fixed plates (611) are respectively fixedly connected to the first connecting rod (525) below. The upper ends of the two fixed plates (611) are rotatably connected to a folding frame (612) through a rotating shaft. A flexible film (613) is provided inside the folding frame (612). Two heating rods (616) are slidably connected to the upper end of the folding frame (612) through a sliding groove. An adsorption sweeping plate (617) is provided on the outer side of the heating rod (616). A second gear (618) is fixedly connected to the other end of the heating rod (616). A linear rack (619) is meshed on the outer side of the second gear (618). The lower ends of the two linear racks (619) are fixedly connected to the folding frame (612). The airflow detection assembly (61) also includes a grating sensor (6113) installed on the upper end of the clamping plate (521).
8. The valve quick clamping mechanism of a valve testing machine according to claim 7, characterized in that: One side of the folding frame (612) is rotatably connected to two first pulleys (614) via a rotating shaft. A partition is provided on the outer side of the first pulleys (614). The outer sides of the two first pulleys (614) are rotatably connected to a first synchronous belt (615). The upper end of the first synchronous belt (615) is fixedly connected to two heating rods (616) respectively via two locking blocks. A third motor (6110) is installed at the lower end of the folding frame (612). The output shaft of the third motor (6110) is fixedly connected to a second pulley (6111). The outer side of the second pulley (6111) is rotatably connected to a second synchronous belt (6112). The inner side of the second synchronous belt (6112) is rotatably connected to one of the two first pulleys (614).
9. The valve quick clamping mechanism of a valve testing machine according to claim 6, characterized in that: The adsorption assembly (62) includes two electric telescopic rods (621), which are respectively arranged on both sides of the installation chamber (513). The output shaft of the electric telescopic rod (621) is rotatably connected to a fourth connecting rod (622). One end of the fourth connecting rod (622) is rotatably connected to the clamping plate (521), and the other end of the fourth connecting rod (622) is rotatably connected to a fixed rotating shaft (623). A sleeve (624) is rotatably connected to the outside of the fixed rotating shaft (623). A guide rail (625) is fixedly connected to the outside of the sleeve (624). A push rod (626) is slidably connected to the inside of the guide rail (625). An arc-shaped push plate (627) is fixedly connected to the other end of the push rod (626). A folded adsorption strip (628) is provided on the outside of multiple arc-shaped push plates (627).
10. The valve quick clamping mechanism of a valve testing machine according to claim 9, characterized in that: A fourth motor (629) is mounted on one side of one of the multiple guide rails (625). The output shaft of the fourth motor (629) is fixedly connected to a third gear (6210). The outer side of the third gear (6210) is meshed with a fourth gear (6211). The inner side of the fourth gear (6211) is rotatably connected to a fixed rotating shaft (623). Multiple inclined sliding grooves are provided on the outer side of the fourth gear (6211). A push shaft (6212) is slidably connected in the inclined sliding groove of the fourth gear (6211). The front ends of the multiple push shafts (6212) are respectively fixedly connected to the corresponding push rods (626).