Valve sealing performance detection device and use method thereof

Abstract

The invention belongs to the technical field of valve detection, and particularly relates to a sealing performance detection device of a valve and a use method thereof, and the sealing performance detection device comprises a fixed frame, a detection box, a plurality of movable frames, a clamping part, a plurality of groups of inflation parts, and a driving mechanism. A detection box for containing detection liquid is arranged below the fixed frame, and the detection box can be close to and far away from the fixed frame; the plurality of movable frames are distributed on the fixed frame in a circumferential array mode, the movable frames are connected with the fixed frame in a sliding mode in the vertical direction, the motion trail of the movable frames comprises an initial position and a marking position, clamping pieces are arranged on the movable frames, and the clamping pieces can clamp and release a to-be-tested piece; each group of inflating parts corresponds to one group of clamping parts, each inflating part comprises two sealing plates, the two sealing plates can seal two ports of the to-be-tested part, one sealing plate is provided with an inflating pipe, and the to-be-tested part can be inflated through the inflating pipe; the driving mechanism can switch the movable frames from the initial position to the marking position in an alternative mode and can switch all the movable frames from the marking position to the initial position at the same time. Compared with the prior art, by means of multi-station synchronous detection and semi-automatic defective product marking, the detection efficiency of batch valves is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of valve detection, and in particular relates to a valve sealing detection device and a use method thereof, which are suitable for sealing detection of batch valves. Background Art

[0002] To ensure the quality of valves during the production process, valves are tested for leaks after assembly before they are sold. Only when the valves are leak-free and meet the national sealing standards are they qualified products and can they be sold.

[0003] Currently, when testing the sealing performance of valves, each test is performed on one valve at a time. After the valve is sealed and clamped and gas or liquid is introduced, it is necessary to apply pressure and maintain pressure for dozens of minutes, and then observe and record for a few minutes to complete the sealing performance test of a valve. This testing method is less efficient when it is necessary to test batches of valves. Therefore, how to improve the efficiency of sealing performance testing for batches of valves is a difficult problem that needs to be solved urgently in the industry.

[0004] Patent documents retrieved that are similar to this application: Publication number: CN119509832B, Patent name: A valve sealing detection device and its use method. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned technical problems and provide a valve sealing detection device and its use method, which significantly improves the detection efficiency of batch valves through multi-station synchronous detection and semi-automatic defective product marking.

[0006] In view of this, the present invention provides a valve sealing detection device, comprising: A fixed frame, under which a test box containing the test liquid is provided, and the test box can be moved close to or away from the fixed frame; Multiple movable frames, the multiple movable frames are distributed in a circular array on the fixed frame, the movable frames are slidably connected to the fixed frame along the vertical direction, the motion trajectory of the movable frames includes an initial position and a mark position, and the movable frames are provided with clamping members that can clamp and release the test piece; Multiple groups of inflatable parts, each group of inflatable parts corresponds to a group of clamping parts. The inflatable parts include two sealing plates, which can seal the two ports of the test piece. One sealing plate is provided with an inflation tube, through which the test piece can be inflated; The driving mechanism can switch the movable frame from the initial position to the marking position in an alternative manner, and the driving mechanism can switch all the movable frames from the marking position to the initial position at the same time.

[0007] In this technical solution, the inspector switches all the movable racks from the marking position to the initial position, clamps multiple pieces to be tested on the fixed rack at the same time through the clamping parts on multiple movable racks, and then inflates the multiple pieces to be tested respectively through multiple sets of inflatable parts. Then, the inspection box containing the testing liquid is placed close to the fixed rack so that all the pieces to be tested are immersed in the testing liquid. When the inspector finds that a piece to be tested is leaking, the movable rack corresponding to the piece to be tested is switched to the marking position and marked as defective. After the inspection is completed, the qualified products and defective products will be located at the initial position and the marking position respectively. At this time, the inspector will remove the qualified products and defective products respectively for subsequent operations.

[0008] In the above technical solution, further, the clamping member includes a positioning seat and a clamping plate, the clamping plate is detachably connected to the positioning seat, the positioning seat can position the end of the workpiece to be tested, and the clamping plate can fix the workpiece to be tested on the positioning seat.

[0009] In the above technical solution, further, a machine table is provided below the detection box, the detection box is slidably provided on the machine table in a vertical direction, and an adjusting member for adjusting the vertical position of the detection box is provided on the machine table.

[0010] In the above technical solution, further, the detection box is made of transparent material.

[0011] In the above technical solution, further, a first elastic member is connected between the fixed frame and the movable frame. When the movable frame is at the initial position, the first elastic member is in a natural state. When the movable frame is at the marking position, the first elastic member is in a stressed state.

[0012] In the above technical solution, further, multiple groups of locking members are provided on the fixed frame, each group of locking members corresponds to a movable frame, and when the movable frame is located at the marked position, the locking members can lock the movable frame at the current position, and the driving mechanism can unlock the movable frame before switching the movable frame from the marked position to the initial position.

[0013] In the above technical solution, further, the driving mechanism includes: A driving frame is located at the center of the distribution circle of the multiple movable frames and is vertically slidably connected to the fixed frame; A driving member capable of driving the driving frame to move vertically relative to the fixed frame, wherein the motion trajectory of the driving frame includes a pressed position, an intermediate position, and an unlocked position; A pressing arm, wherein a first end of the pressing arm is connected to the driving frame, and a second end of the pressing arm is located above a movable frame. When the driving frame moves from the intermediate position to the pressing position, the second end of the pressing arm switches a movable frame from an initial position to a marking position. The second end of the mounting arm can be switched above each movable frame; Multiple unlocking arms, each unlocking arm corresponds to a group of locking parts, the first end of the unlocking arm is connected to the driving frame, the second end of the unlocking arm can contact the locking part, and the second end of the unlocking arm unlocks the movable frame at the marked position during the movement of the driving frame from the intermediate position to the unlocking position.

[0014] In the above technical solution, further, a locking groove is provided on the side wall of the movable frame, and the locking member includes: A locking block is connected to the fixed frame by sliding along a direction perpendicular to the movement of the movable frame. The locking block can be inserted into and out of the locking groove along the sliding direction. When the movable frame is in the marked position, the locking block is opposite to the locking groove. When the movable frame is in other positions, the locking block abuts against the side wall of the movable frame. A second elastic member is provided between the locking block and the fixed frame. When the locking block abuts against the side wall of the movable frame, the second elastic member is in a stressed state. When the locking block is engaged with the locking groove, the second elastic member is in a natural state. When the driving frame moves from the middle position to the unlocking position, the second end of the unlocking arm can push the locking block out of the locking groove.

[0015] In the above technical solution, further, a first inclined surface is provided at the bottom of the locking block, the second end of the unlocking arm is located below the locking block, and a second inclined surface is provided at the second end of the unlocking arm close to the first inclined surface. During the movement of the driving frame from the middle position to the unlocking position, the second inclined surface can contact the first inclined surface and push the locking block in the direction of squeezing the second elastic member.

[0016] The present invention also discloses a method for using the aforementioned sealing detection device, which comprises the following steps: Step 1: Switch the multiple movable racks to their initial positions, switch the drive rack to the middle position, clamp the multiple test pieces on the multiple movable racks through the clamping pieces, and inject gas of preset pressure into the multiple test pieces through the multiple sets of inflatable pieces; Step 2: Pour the test liquid into the test box, and control the test box to be close to the fixed frame so that all the parts to be tested enter the test liquid; Step 3: Observe whether the test piece is leaking. If a test piece is leaking, the second end of the pressing arm is moved to the upper portion of the movable frame corresponding to the test piece, and the driving member is used to switch the driving frame from the middle position to the pressing position. After the movable frame is locked in the marked position, the driving member is used to switch the driving frame from the pressing position to the middle position. This process is repeated to complete the position switching of the movable frames corresponding to all leaking test pieces. Step 4: Control the test box to move away from the fixed frame and collect the test pieces at the initial position and the marked position respectively; Step 5: Use the driving member to switch the driving frame from the middle position to the unlocked position. After all movable frames are switched to the initial positions, use the driving member to switch the driving frame from the unlocked position to the middle position.

[0017] The beneficial effects of the present invention are: 1. By arranging multiple movable racks on the fixed rack, and arranging clamping parts on the movable racks to clamp the workpieces to be tested, and each movable rack corresponding to a group of inflatable parts to inflate multiple workpieces to be tested at the same time, multi-station synchronous detection of valves is realized, which greatly improves the efficiency of valve detection. In addition, when there are many workpieces to be tested, defective products can be clearly marked by switching the movable rack between the initial position and the marking position. This can realize cross-coordinated detection by multiple inspectors, greatly reduce the labor intensity of each inspector, and further improve the efficiency of batch valve detection.

[0018] 2. The drive mechanism locks and marks multiple movable racks one at a time, and simultaneously unlocks and resets the racks. This allows for accurate marking of defective products during the inspection process and efficient reset after the inspection. This shortens the configuration and preparation time of the inspection device, thereby improving the efficiency of batch valve inspection.

[0019] 3. Through the mechanical locking mechanism and elastic reset design, the structure is stable and reliable. The position switching of all movable frames can be completed through only one driving part, with low energy consumption, simple structure and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the overall three-dimensional perspective structure of the present invention.

[0023] Figure 3 Schematic diagram of the three-dimensional structure of the fixing frame and its components in the present invention Figure 1 .

[0024] Figure 4 Schematic diagram of the three-dimensional structure of the fixing frame and its components in the present invention Figure 2 .

[0025] Figure 5It is a cross-sectional perspective schematic diagram of the fixing frame and the components thereon in the radial direction of the fixing frame in the present invention.

[0026] Figure 6 It is a schematic cross-sectional plan view of the fixing frame and the components thereon in the radial direction of the fixing frame in the present invention.

[0027] Figure 7 This is a schematic diagram of a movable frame located at a marking position and a driving frame located at a pressing position in the present invention.

[0028] Figure 8 This is a schematic diagram of a movable frame located at a marked position and a driving frame located at a middle position in the present invention.

[0029] Figure 9 This is a schematic diagram of the present invention in which the two movable frames are located at the marked positions and the driving frame is located in the middle position.

[0030] Figure 10 This is a schematic diagram showing that the two movable frames are located in the initial positions and the driving frame is located in the unlocked position in the present invention.

[0031] The marks in the figure are: F. Part to be tested; 1. Fixed frame; 2. Testing box; 3. Movable frame; 301. Locking groove; 4. Clamping member; 401. Positioning seat; 402. Clamping plate; 5. Inflatable member; 501. Sealing plate; 502. Inflating tube; 6. Driving mechanism; 601. Driving frame; 602. Driving member; 603. Pressing arm; 604. Unlocking arm; 6041. Second inclined plane; 7. Machine platform; 701. Adjusting member; 8. First elastic member; 801. Locking block; 802. Second elastic member; 8011. First inclined plane. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0034] The test piece F in the present invention refers to a small or medium-sized valve manufactured in the industry, which has two ports, a medium inlet and a medium outlet. Flanges are provided at both ports of the test piece F.

[0035] Example 1 The embodiment of the present invention provides a valve sealing detection device, comprising: a fixed frame 1, a detection box 2, a plurality of movable frames 3, a clamping member 4, a plurality of inflatable members 5 and a driving mechanism 6; See also Figure 1 and Figure 2 The fixing frame 1 serves as the main supporting structure of the entire detection device and can be made of high-strength steel to ensure structural stability. In this embodiment, the fixing frame 1 can be fixed at a position above the ground by a structure such as a gantry. A test box 2 is provided below the fixed frame 1. The top of the test box 2 has a tank for holding a test liquid. The test box 2 can be moved closer to and away from the fixed frame 1 to facilitate immersion of the test object F in and out of the test liquid. A drainage structure is provided at the bottom of the test box 2 to facilitate the discharge of the test liquid after the test is completed. The drainage structure is a conventional structure of a liquid container and is not described in detail here. In this embodiment, the detection box 2 can be made of transparent materials, such as acrylic plate, tempered glass, etc., so that during the valve detection process, the inspector can easily observe the state of the test piece F in the detection liquid and quickly determine whether the test piece F is leaking.

[0036] For details, please refer to Figure 2A machine platform 7 is provided under the detection box 2. The machine platform 7 is mainly used to carry the detection box 2. The position of the machine platform 7 is fixed relative to the fixed frame 1. The detection box 2 is slidably arranged on the machine platform 7 along the vertical direction. The machine platform 7 is provided with an adjusting member 701 for adjusting the vertical position of the detection box 2. The adjusting member 701 is easy to disassemble from the machine platform 7. In this embodiment, the adjusting member 701 can be formed by the cooperation of a hydraulic cylinder and a liquid supply device. The hydraulic rod on the hydraulic cylinder is connected to the bottom of the detection box 2 to adjust the vertical position of the detection box 2.

[0037] In this embodiment, the portion where the fixed frame 1 and the movable frame 3 are connected can be designed as a disc or a rectangular body, and a plurality of movable frames 3 are distributed in a circular array on the fixed frame 1. In the accompanying drawings, four movable frames 3 are taken as an example. The movable frames 3 are slidably connected to the fixed frame 1 in the vertical direction. The motion trajectory of the movable frame 3 includes an initial position and a marked position. In this embodiment, there is a significant height difference between the initial position and the marked position, and the inspector can quickly tell whether the movable frame 3 is at the initial position or the marked position. For example, when the movable frame 3 is at the initial position, the top of the movable frame 3 obviously exceeds the upper surface of the fixed frame 1, and when the movable frame 3 is at the marked position, the top of the movable frame 3 is lower than the upper surface of the fixed frame 1; The movable frame 3 is provided with a clamping member 4, which can clamp and release the test piece F; for details, please refer to Figure 3 and Figure 4 , the clamping member 4 includes a positioning seat 401 and a clamping plate 402, the positioning seat 401 is fixed on the side wall of the movable frame 3, and the positioning seat 401 is provided with an arc-shaped groove that is adapted to the outer wall of the workpiece F to be tested near the port, and the end of the workpiece F to be tested can be positioned through the arc-shaped groove. Preferably, two positioning seats 401 can be arranged at intervals in the vertical direction on the movable frame 3 to achieve positioning of both ends of the workpiece F to be tested; the clamping plate 402 is detachably connected to the positioning seat 401, such as a threaded connection. For example, threaded holes are provided on both sides of the positioning seat 401, and through holes are provided on both sides of the clamping plate 402. The threaded end of the threaded fastener passes through the through hole and is threadedly matched with the threaded hole, so that the workpiece F to be tested is fixed to the positioning seat 401 through the clamping plate 402; Each set of inflatable parts 5 corresponds to a set of clamping parts 4, see Figure 3 The inflatable member 5 includes two sealing plates 501. The two sealing plates 501 are freely movable and do not need to be fixed to the movable frame 3 when idle. The two sealing plates 501 are respectively connected to the two ports of the test piece F to seal the two ports of the test piece F. For example, the sealing plates 501 are adapted to the flanges at the ports of the test piece F and can be connected to the flanges at the ports of the test piece F by bolts and nuts. In this embodiment, after the test piece F is fixed to the movable frame 3 by the clamping member 4, the two ports of the test piece F are sealed by the two sealing plates 501. An air filling tube 502 is provided on a sealing plate 501. Figure 5 The gas filling tube 502 passes through the two opposite end surfaces of the corresponding sealing plate 501. When inflating the test piece F, a hose is connected to the end of the gas filling tube 502 away from the sealing plate 501, and the other end of the hose is connected to a gas supply device. The gas supply device inflates the test piece F through the hose and the gas filling tube 502. When the gas of the preset pressure is injected into the test piece F, the gas supply device stops injecting gas and seals the hose to maintain the pressure in the test piece F until the test is completed. The driving mechanism 6 can switch the movable frame 3 from the initial position to the marking position in a selective manner. The driving mechanism 6 can switch all the movable frames 3 from the marking position to the initial position at the same time. Any structure that can achieve this function in the prior art can be used as the driving mechanism 6 in this embodiment. The use process of the sealing detection device of this embodiment is divided into four stages: Clamping stage: multiple valves are clamped on the movable frame 3 respectively, and gas of preset pressure is filled into the valves through the inflatable member 5; Detection stage: the detection box 2 rises to immerse the valve in the detection liquid and observe whether there are bubbles. If a valve leaks, the driving mechanism 6 switches its corresponding movable frame 3 to the marked position; Classification stage: After the test is completed, the test box 2 descends and collects the valves in the initial position (qualified products) and the marked position (defective products) respectively; Reset stage: the driving mechanism 6 unlocks all movable racks 3 and resets them to their initial positions, preparing for the next batch of testing.

[0038] Example 2 Based on Example 1, this embodiment further discloses a method for switching the movable frame 3 between the initial position and the marking position; See also Figure 3 and Figure 4 An extension block is provided on the top side wall of the movable frame 3, and a first elastic member 8 is connected between the extension block and the upper surface of the fixed frame 1. When the movable frame 3 is in the initial position, the first elastic member 8 is in a natural state. When the movable frame 3 is in the marking position, the first elastic member 8 is in a stressed state. At this time, the first elastic member 8 has a tendency to return to its original state. That is, when the movable frame 3 is in the marking position, if there is no external force restricting the movable frame 3, the movable frame 3 can return to the initial position under the elastic force of the first elastic member 8; See also Figure 5 and Figure 6 , a plurality of locking members are provided on the fixed frame 1, each locking member corresponding to a movable frame 3, when the movable frame 3 is located at the marked position, the locking member can lock the movable frame 3 at the current position, and the driving mechanism 6 can unlock the movable frame 3 before switching the movable frame 3 from the marked position to the initial position; In this embodiment, after the driving mechanism 6 pushes the movable frame 3 from the initial position to the marked position, the locking member locks the movable frame 3. At this time, the driving mechanism 6 no longer needs to apply force to the movable frame 3. In this way, the driving mechanism 6 does not need to continuously apply force, and more optional structures of the driving mechanism 6 are available. In addition, the movable frame 3 can be unlocked by applying a force other than the driving mechanism 6 to the locking member to unlock the movable frame 3, or the driving mechanism 6 can drive the locking member to move to unlock the movable frame 3. Through the cooperation between the locking part and the movable frame 3, it can be ensured that the defective products found during the inspection process are stably kept in the marked position, ensuring the reliability of the marking, and after the inspection is completed, under the elastic force of the first elastic part 8, multiple movable frames 3 can be reset at the same time, reducing manual intervention and improving inspection efficiency.

[0039] Example 3 This embodiment further discloses a structure of the driving mechanism 6 based on the embodiment 2; The driving mechanism 6 includes: a driving frame 601, a driving member 602, a pressing arm 603, and a plurality of unlocking arms 604; See also Figure 3 and Figure 4 A through groove is provided on the fixed frame 1 at the center of the distribution circle of the multiple movable frames 3. The through groove passes through the upper and lower surfaces of the fixed frame 1. The driving frame 601 is slidably connected in the through groove along the vertical direction. In this embodiment, the driving frame 601 is a columnar body. The driving member 602 can drive the driving frame 601 to move vertically relative to the fixed frame 1. For example, the driving member 602 is a pneumatic cylinder, which is fixed relative to the fixed frame 1. The pneumatic rod on the pneumatic cylinder is connected to the top of the driving frame 601. The pneumatic cylinder cooperates with the air supply device to drive the pneumatic rod to move vertically, thereby driving the driving frame 601 to move vertically. The movement trajectory of the driving frame 601 includes a pressed position, an intermediate position, and an unlocked position. See also Figure 3The first end of the pressing arm 603 has a ring body, and the ring body is coaxially connected to the driving frame 601 so that the second end of the pressing arm 603 can be adjusted in angle with the axis of the driving frame 601 as the center. The second end of the pressing arm 603 is located above a movable frame 3, and the driving frame 601 will move with the pressing arm 603 during the vertical movement. When the driving frame 601 moves from the middle position to the pressing position, the second end of the pressing arm 603 switches a movable frame 3 from the initial position to the marking position; the rotation between the ring body and the driving frame 601 can be restricted, such as providing a locking structure between the ring body and the driving frame 601. When a certain movable frame 3 needs to be switched in position, the second end of the pressing arm 603 When the locking mechanism is in place, the ring body is locked and the drive frame 601 is locked. The locking mechanism is used to lock the ring body and the drive frame 601. The locking mechanism is used to lock the ring body and the drive frame 601. The locking mechanism is used to lock the ring body and the drive frame 601. The locking mechanism is used to lock the ring body and the drive frame 601. The locking mechanism is used to lock the ring body and the drive frame 601. See also Figure 5 and Figure 6 Each unlocking arm 604 corresponds to a set of locking members. The first end of the unlocking arm 604 is connected to the driving frame 601, and the second end of the unlocking arm 604 can contact the locking member. When the driving frame 601 moves from the intermediate position to the unlocking position, the second end of the unlocking arm 604 unlocks the movable frame 3 at the marked position. In this embodiment, the unlocking position, the intermediate position, and the pressing position are distributed from top to bottom in the vertical direction. The intermediate position is where the driving frame 601 is at a moderate height. When the driving member 602 drives the driving frame 601 downward at the intermediate position, the driving frame 601 moves from the intermediate position to the pressing position; when the driving member 602 drives the driving frame 601 upward at the intermediate position, the driving frame 601 moves from the intermediate position to the unlocking position. In this embodiment, a locking groove 301 is provided on the side wall of the movable frame 3, and the locking member includes a locking block 801 and a second elastic member 802; See also Figure 5 and Figure 6 The locking block 801 is connected to the fixed frame 1 by sliding in a direction perpendicular to the movement of the movable frame 3. The locking block 801 can be inserted into and out of the locking groove 301 along the sliding direction. When the movable frame 3 is in the marked position, the locking block 801 is opposite to the locking groove 301. When the movable frame 3 is in other positions, the locking block 801 abuts against the side wall of the movable frame 3. The second elastic member 802 is disposed between the locking block 801 and the fixed frame 1. When the locking block 801 abuts against the side wall of the movable frame 3, the second elastic member 802 is in a stressed state. At this time, the second elastic member 802 has a tendency to return to its original state. When the locking block 801 is engaged with the locking groove 301, the second elastic member 802 is in a natural state. See also Figure 6 In this embodiment, a first inclined surface 8011 is provided at the bottom of the locking block 801, and the second end of the unlocking arm 604 is located below the locking block 801. A second inclined surface 6041 is provided at the second end of the unlocking arm 604 near the first inclined surface 8011. When the driving frame 601 moves from the intermediate position to the unlocked position, the second inclined surface 6041 can contact the first inclined surface 8011 and push the locking block 801 in the direction of squeezing the second elastic member 802. See also Figure 7 and Figure 8 , Figure 7 The movable frame 3 on the middle right is in the initial position. Figure 7 The locking block 801 on the middle right side abuts against the corresponding side wall of the movable frame 3 under the elastic force of the second elastic member 802; Figure 7 The movable frame 3 on the left side is pushed down by the second end of the pressing arm 603 to the marking position. Figure 7 The locking block 801 on the left side is opposite to the locking groove 301. Figure 7 The second elastic member 802 on the left side can push the locking block 801 into the corresponding locking groove 301, so that Figure 8 The state of the movable frame 3 on the left side, at this time the driving frame 601 returns from the pressing position to the middle position, Figure 8 The second end of the middle pressing arm 603 is separated from the movable frame 3 on the left side; See also Figure 8 and Figure 9 ,exist Figure 8 After the middle driving frame 601 returns to the middle position, the second end of the pressing arm 603 is higher than the top of the movable frame 3 at the initial position. At this time, the angle of the second end of the pressing arm 603 can be switched so that the second end of the pressing arm 603 comes to the middle position. Figure 8 Above the middle right movable frame 3 ( Figure 8 not shown), followed by Figure 8 The movable frame 3 on the middle right side is pushed down to the marked position by the second end of the pressing arm 603. Figure 8 The second elastic member 802 on the middle right side can push the locking block 801 into the corresponding locking groove 301, and then drive the frame 601 back to the middle position from the pressing position, so that Figure 9 Status in When the driving frame 601 moves from the middle position to the pressing position and then returns to the middle position, the second end of the unlocking arm 604 is moderately located below the locking block 801, and the second inclined surface 6041 is moderately separated from the first inclined surface 8011. See also Figure 9 and Figure 10 , Figure 9 The figure shows that multiple movable racks 3 are switched to the marked position during the valve detection process. When the detection is completed and the test pieces F on all movable racks 3 are removed, the driving member 602 drives the driving rack 601 to move upward, so that the driving rack 601 moves from the middle position to the unlocking position. During this process, the second ends of all unlocking arms 604 are close to the corresponding locking blocks 801, and all the second inclined surfaces 6041 are in contact with the corresponding first inclined surfaces 8011. Thereafter, as the driving rack 601 continues to move upward, the second ends of all unlocking arms 604 squeeze the corresponding locking blocks 801 toward the corresponding second elastic The first spring 802 pushes the locking block 801 in the direction of the locking groove 301, and at the same time, all the movable frames 3 at the marked position are no longer locked. These movable frames 3 then return to their initial positions under the elastic force of the first elastic member 8. Thereafter, the driving member 602 drives the driving frame 601 downward to return the driving frame 601 from the unlocked position to the middle position. In this process, all the locking blocks 801 lose external force restrictions and move toward the direction of the corresponding movable frame 3 under the elastic force of the corresponding second elastic member 802, and finally abut against the side wall of the corresponding movable frame 3, thereby obtaining a locking state. Figure 10 Status in In this embodiment, a semi-automatic defective marking method is formed by the cooperation of the first elastic member 8, the drive frame 601, the drive member 602, the pressing arm 603, the multiple unlocking arms 604, the locking block 801 and the second elastic member 802, and by manual control by the inspection personnel and the cooperation with the automatic transmission structure of the inspection device. It can achieve reliable defective marking during the inspection of batches of parts F to be tested, and the simultaneous unlocking and resetting of multiple movable frames 3 after the inspection is completed. It is necessary to consider that the number of operating steps is relatively small and the inspection efficiency is high. In addition, the inspection device mainly adopts mechanical structure transmission cooperation, with low transmission failure rate and low maintenance cost.

[0040] It should be noted that after the test piece F is clamped, the height of the movable frame 3 will be lower than the height of the movable frame 3 when the test piece F is not clamped. However, the height of the movable frame 3 at this time is still significantly different from the height when it is at the marked position. The position of the movable frame 3 at this time can also be called the initial position.

[0041] Example 4 This embodiment discloses a method for using the aforementioned sealing detection device, which includes the following steps: Step 1: Switch the multiple movable frames 3 to the initial position, switch the drive frame 601 to the middle position, clamp the multiple test pieces F on the multiple movable frames 3 using the clamping members 4, and inject gas of preset pressure into the multiple test pieces F using the multiple sets of inflatable members 5; Step 2: inject the testing liquid into the testing box 2, and control the testing box 2 to be close to the fixing frame 1 so that all the test pieces F enter the testing liquid; Step 3: Observe whether the test piece F is leaking. If a test piece F is leaking, the second end of the pressing arm 603 is moved to the position above the movable frame 3 corresponding to the test piece F. The driving member 602 is used to switch the driving frame 601 from the middle position to the pressing position. After the movable frame 3 is locked in the marked position, the driving member 602 is used to switch the driving frame 601 from the pressing position to the middle position. This process is repeated to complete the position switching of the movable frames 3 corresponding to all the leaking test pieces F. Step 4: Control the testing box 2 to move away from the fixing frame 1 and collect the test pieces F at the initial position and the marked position respectively; Step 5: The driving frame 601 is switched from the middle position to the unlocked position by the driving member 602. After all the movable frames 3 are switched to the initial position, the driving frame 601 is switched from the unlocked position to the middle position by the driving member 602. In this embodiment, by using the aforementioned sealing detection device, multiple valves are clamped at the same time during the detection and are uniformly immersed in the detection liquid, thereby avoiding the repeated operations of traditional single-piece detection and improving the detection efficiency several times; the movable frame 3 corresponding to the leaking valve is locked in the marked position by semi-automatic defective product marking. No manual recording is required after the detection, and qualified products and defective products are directly distinguished by the position difference of the movable frame 3 (initial position and marked position). The marking is reliable, and multiple inspectors can work together to reduce the labor intensity of a single person. The same group of inspectors can also operate multiple detection devices at the same time, further improving the efficiency of valve detection; in addition, the company can provide targeted training to the inspectors, and the inspectors do not need to master all the steps, which can reduce the training cost.

[0042] The embodiments of the present invention are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are protected by the present invention.

Claims

1. A valve sealing detection device, characterized in that: include: A fixed frame (1), a detection box (2) for containing detection liquid is provided below the fixed frame (1), and the detection box (2) can be moved close to and away from the fixed frame (1); A plurality of movable frames (3), wherein the plurality of movable frames (3) are distributed on the fixed frame (1) in a circular array, the movable frames (3) are slidably connected to the fixed frame (1) along a vertical direction, the motion trajectory of the movable frames (3) includes an initial position and a marking position, and a clamping member (4) is provided on the movable frame (3), and the clamping member (4) can clamp and release the test piece (F); Multiple groups of inflatable members (5), each group of inflatable members (5) corresponding to a group of clamping members (4), the inflatable members (5) comprising two sealing plates (501), the two sealing plates (501) being capable of sealing two ports of the test piece (F), one of the sealing plates (501) being provided with an inflatable tube (502), through which the test piece (F) can be inflated; A driving mechanism (6) is provided, wherein the driving mechanism (6) can switch the movable frame (3) from the initial position to the marking position in an alternative manner, and the driving mechanism (6) can switch all the movable frames (3) from the marking position to the initial position at the same time.

2. The valve sealing detection device according to claim 1, characterized in that: The clamping member (4) comprises a positioning seat (401) and a clamping plate (402), wherein the clamping plate (402) is detachably connected to the positioning seat (401), the positioning seat (401) can position the end of the workpiece (F) to be tested, and the clamping plate (402) can fix the workpiece (F) to be tested on the positioning seat (401).

3. The valve sealing detection device according to claim 1, characterized in that: A machine platform (7) is provided below the detection box (2), and the detection box (2) is slidably provided on the machine platform (7) in a vertical direction. An adjusting member (701) for adjusting the vertical position of the detection box (2) is provided on the machine platform (7).

4. The valve sealing detection device according to claim 1, characterized in that: The detection box (2) is made of transparent material.

5. The valve sealing detection device according to claim 1, 2, 3 or 4, characterized in that: A first elastic member (8) is connected between the fixed frame (1) and the movable frame (3); when the movable frame (3) is at an initial position, the first elastic member (8) is in a natural state; when the movable frame (3) is at a marked position, the first elastic member (8) is in a stressed state.

6. The valve sealing detection device according to claim 5, characterized in that: The fixed frame (1) is provided with a plurality of groups of locking members, each group of the locking members corresponding to one of the movable frames (3); when the movable frame (3) is located at a marked position, the locking members can lock the movable frame (3) at the current position; and the driving mechanism (6) can unlock the movable frame (3) before switching the movable frame (3) from the marked position to the initial position.

7. The valve sealing detection device according to claim 6, characterized in that: The driving mechanism (6) comprises: A driving frame (601), the driving frame (601) is located at the center of the distribution circle of the plurality of movable frames (3), and the driving frame (601) is vertically slidably connected to the fixed frame (1); A driving member (602), wherein the driving member (602) is capable of driving the driving frame (601) to move vertically relative to the fixing frame (1), and the movement trajectory of the driving frame (601) includes a pressing position, an intermediate position, and an unlocking position; A pressing arm (603), wherein a first end of the pressing arm (603) is connected to the driving frame (601), and a second end of the pressing arm (603) is located above one of the movable frames (3); when the driving frame (601) moves from the intermediate position to the pressing position, the second end of the pressing arm (603) switches one of the movable frames (3) from the initial position to the marking position; and the second end of the mounting arm can be switched above each of the movable frames (3); A plurality of unlocking arms (604), each of the unlocking arms (604) corresponds to a group of locking members, a first end of the unlocking arm (604) is connected to the driving frame (601), a second end of the unlocking arm (604) can contact the locking member, and when the driving frame (601) moves from the intermediate position to the unlocking position, the second end of the unlocking arm (604) unlocks the movable frame (3) located at the marked position.

8. The valve sealing detection device according to claim 7, characterized in that: A locking groove (301) is provided on the side wall of the movable frame (3), and the locking member comprises: a locking block (801), the locking block (801) being slidably connected to the fixed frame (1) in a direction perpendicular to the movement of the movable frame (3); the locking block (801) being able to engage in and exit the locking groove (301) in the sliding direction; when the movable frame (3) is at the marked position, the locking block (801) is positioned opposite to the locking groove (301); and when the movable frame (3) is at other positions, the locking block (801) abuts against the side wall of the movable frame (3); a second elastic member (802), the second elastic member (802) being arranged between the locking block (801) and the fixed frame (1); when the locking block (801) abuts against the side wall of the movable frame (3), the second elastic member (802) is in a stressed state; and when the locking block (801) is inserted into the locking groove (301), the second elastic member (802) is in a natural state; During the movement of the driving frame (601) from the intermediate position to the unlocking position, the second end of the unlocking arm (604) can push the locking block (801) out of the locking slot (301).

9. The valve sealing detection device according to claim 8, characterized in that: A first inclined surface (8011) is provided at the bottom of the locking block (801), the second end of the unlocking arm (604) is located below the locking block (801), and a second inclined surface (6041) is provided at the second end of the unlocking arm (604) near the first inclined surface (8011). When the driving frame (601) moves from the middle position to the unlocking position, the second inclined surface (6041) can contact the first inclined surface (8011) and push the locking block (801) in the direction of squeezing the second elastic member (802).

10. A method for using a sealing detection device, applicable to the sealing detection device according to claim 8, characterized in that: The following steps are involved: Step 1: Switch the multiple movable frames (3) to the initial position, switch the driving frame (601) to the middle position, clamp the multiple test pieces (F) on the multiple movable frames (3) through the clamping members (4), and inject gas of preset pressure into the multiple test pieces (F) through the multiple sets of inflatable members (5); Step 2: injecting a test liquid into the test box (2), and controlling the test box (2) to be close to the fixed frame (1) so that all the test pieces (F) enter the test liquid; Step 3: Observe whether the test piece (F) leaks. If a test piece (F) leaks, the second end of the pressing arm (603) is switched to the upper portion of the movable frame (3) corresponding to the test piece (F), and the driving frame (601) is switched from the middle position to the pressing position by the driving member (602). After the movable frame (3) is locked in the marked position, the driving frame (601) is switched from the pressing position to the middle position by the driving member (602). This process is repeated to complete the position switching of the movable frames (3) corresponding to all the leaking test pieces (F). Step 4: Control the detection box (2) to move away from the fixed frame (1) and collect the test pieces (F) at the initial position and the marked position respectively; Step 5: The driving frame (601) is switched from the middle position to the unlocked position by the driving member (602). After all the movable frames (3) are switched to the initial positions, the driving frame (601) is switched from the unlocked position to the middle position by the driving member (602).

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