Production method and device of low-leakage ball valve

Abstract

The invention discloses a low-leakage ball valve production method and device, and relates to the technical field of ball valve assembly.The low-leakage ball valve production device comprises a rack and further comprises a conveying table, the conveying table is horizontally installed at the bottom of the rack in a sliding mode, a valve body installation base is installed at the top of the conveying table, and a pushing and pressing correction mechanism and a lifting frame are installed on one side of the valve body installation base; the lifting frame is vertically installed on the rack in a sliding mode, a valve rod inserting clamp and an elastic abutting frame are installed at the bottom of the lifting frame, an inserting cleaning mechanism in transmission connection with the lifting frame is installed on the elastic abutting frame, and in the process that the conveying table moves to the assembly station, the pushing correction mechanism conducts pre-calibration on the direction of a valve body; and then when the elastic abutting frame abuts against the conveying table, the lifting frame drives the insertion cleaning mechanism to be inserted into the calibrated valve rod insertion hole and then pulled out in the descending process. According to the invention, a dynamic pre-calibration mechanism is arranged, so that the pushing and pressing correction mechanism performs real-time angle correction on the valve body in the moving process of the conveying table.

Description

Technical Field

[0001] The present invention relates to the technical field of ball valve assembly, and particularly to a production method and device for a low-leakage ball valve. Background Art

[0002] When assembling a ball valve, first place the seal in the valve body, then manually insert the valve stem into the valve stem hole from the inside of the valve body, rotate and adjust the position of the valve stem, adjust the orientation of the valve stem groove above the valve ball so that the valve stem groove is directly opposite to the connecting part at the bottom of the valve stem, and then install the valve ball into the valve body.

[0003] The patent publication number of an existing patent application is: CN205950241U, and the publication date is February 15, 2017. The name of this patent is "An assembly device for a ball valve stem". This patent includes a frame, the frame is provided with a workbench for placing the valve body, and one side of the workbench is provided with a valve stem assembly device for assembling the valve stem; the valve stem assembly device includes an assembly table and a valve stem clamp placed on the assembly table. The valve stem assembly device also includes a valve stem assembly motor for driving the valve stem clamp to rotate and a valve stem moving component for driving the assembly table to move relative to the workbench; when the valve body is placed on the workbench, the valve stem moving component drives the assembly table to move towards the workbench, the rod clamp clamps the valve stem, and the valve stem assembly motor drives the valve stem clamp to rotate to achieve the assembly of the valve stem, replacing manual assembly, improving production efficiency, and reducing manufacturing costs.

[0004] The above application has deficiencies. It uses a fixed-station step-by-step operation and clamps the valve body before conveying, which is not applicable to working environments with low conveying accuracy. For example, when manually placing the valve body or when the equipment accuracy does not meet the standard, directly clamping will cause offsets that cannot be corrected. The calibration process occupies effective operation time, resulting in an extended production process. At the same time, the cleaning treatment is not thorough. The debris in the valve stem insertion hole is mostly cleaned by an independent blowing method, there are cleaning blind spots, and if it is cleaned by plugging, the orientation of the valve body needs to be adjusted in advance. Summary of the Invention

[0005] The purpose of the present invention is to provide a production method and device for a low-leakage ball valve to solve the above deficiencies in the prior art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A production device for low leakage ball valves comprises a frame and a conveying platform, which is horizontally slidably installed on the bottom of the frame, a valve body mounting seat is installed on the top of the conveying platform, a push correction mechanism is installed on one side of the valve body mounting seat, and a lifting frame is vertically slidably installed on the frame, and a valve stem plug-in clamp and an elastic pressure frame are installed at the bottom of the lifting frame, and a plug-in cleaning mechanism connected to the lifting frame by transmission is installed on the elastic pressure frame. When the conveying platform is moved to the assembly station, the push correction mechanism pre-calibrates the valve body orientation, and then when the elastic pressure frame abuts against the conveying platform, the plug-in cleaning mechanism is driven to be inserted into the valve stem socket on the calibrated valve body and then pulled out during the descent of the lifting frame.

[0008] Preferably, a horizontal hydraulic push rod and a vertical hydraulic push rod are respectively installed on the frame, the end of the horizontal hydraulic push rod is connected to one side of the conveying platform, and the end of the vertical hydraulic push rod is connected to the top of the lifting frame.

[0009] Preferably, a linear guide rail adapted to the conveying platform is fixedly connected to the frame, brake rods are inserted on both sides of the conveying platform, and the pushing correction mechanism squeezes the brake rod to make it abut against the linear guide rail.

[0010] Preferably, the push correction mechanism comprises a clamping plate symmetrically mounted on the valve body mounting seat, and a top spring is installed between the clamping plate and the valve body mounting seat.

[0011] Preferably, a pulling rod is symmetrically and slidably installed on one side of the valve body mounting seat, a guide groove is opened at the bottom of the frame, a hook connected to the top of the pulling rod is installed on the back of the clamping plate, the bottom end of the pulling rod is inserted into the guide groove, and a pair of pulling rods are moved closer to each other when they are translated along the guide groove to the assembly station.

[0012] Preferably, a limiting rod is symmetrically fixedly connected to one side of the top of the elastic pressure frame, the top of the limiting rod passes through the lifting frame, and the outer sleeve of the limiting rod is provided with a buffer spring whose two ends respectively abut the elastic pressure frame and the lifting frame, and an observation port is opened at the top of the elastic pressure frame between a pair of limiting rods and the plug-in cleaning mechanism.

[0013] Preferably, the plug-in cleaning mechanism includes a movable bracket horizontally slidably connected to the elastic pressure frame, a cleaning column is fixedly connected to the top of the movable bracket, a return spring is installed between the bottom of the movable bracket and the elastic pressure frame, transmission gears are rotatably installed on both sides of the elastic pressure frame, a pulling rope connected to the end of the movable bracket is wound around the outer side of the transmission gear, and a driving rack meshing with the transmission gear is symmetrically installed at the bottom of the lifting frame.

[0014] Preferably, a positioning column is fixedly connected to the bottom of the driving rack, and a positioning hole matching the positioning column is opened on the top of the conveying platform.

[0015] Preferably, an elastic airbag is installed on the top of the elastic pressing frame, and an air delivery hole communicating with the elastic airbag is formed on the valve body mounting seat. When the bottom of the elastic pressing frame abuts against the top surface of the conveying table, the elastic airbag communicates with the air delivery hole.

[0016] A production method of a production device for a low-leakage ball valve includes the following steps:

[0017] S1. First, install the valve body on the valve body mounting seat of the conveying table, and make the part of the valve stem inserted on the valve body located in the pushing and correcting mechanism;

[0018] S2. Move the conveying table to the assembly station. During the movement, pre-calibrate the orientation of the valve stem insertion hole on the valve body through the pushing and correcting mechanism;

[0019] S3. When the conveying table reaches the assembly station, the lifting frame starts to descend until the elastic pressing frame abuts against the conveying table;

[0020] S4. The lifting frame continues to descend, driving the inserting and cleaning mechanism to insert into the pre-calibrated insertion hole and then pull out, completing the cleaning and secondary calibration of the valve stem insertion hole;

[0021] S5. Assemble the valve stem into the cleaned insertion hole through the valve stem insertion fixture to complete the assembly production of the ball valve body and the valve stem.

[0022] In the above technical solution, by setting a dynamic pre-calibration mechanism, the pushing and correcting mechanism performs real-time angle correction on the valve body during the movement of the conveying table, integrating the calibration process into the conveying process, enabling the valve body to have a certain degree of deviation when placed, meeting the working environment with low placement accuracy, saving the docking time of the subsequent inserting and cleaning mechanism, ensuring the insertion accuracy. The inserting and cleaning mechanism will synchronously complete the deep cleaning of the valve stem insertion hole on the valve body when the lifting frame descends, and at the same time use the inserting and cleaning mechanism to further correct the deviation of the valve body, ensuring that the valve stem insertion fixture will not overly damage the integrity of the internal sealing structure of the valve body during the process of clamping the valve stem for insertion.

[0023] It should be understood that the foregoing general description and the following detailed description are merely exemplary and explanatory and are not intended to limit the present disclosure.

[0024] This application document provides an overview of various implementations or examples of the technology described in the present disclosure, and does not represent the full scope of the disclosed technology or a complete disclosure of all features. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings.

[0026] Figure 1 Schematic diagram of the overall structure of a production device for a low-leakage ball valve according to the present invention;

[0027] Figure 2 Schematic diagram of the structure of the frame in a production device for a low-leakage ball valve according to the present invention;

[0028] Figure 3 Schematic diagram of the structure of the conveying table and the valve body mounting seat in a production device for a low-leakage ball valve according to the present invention;

[0029] Figure 4 In the present invention Figure 3 Enlarged view of the structure at location A;

[0030] Figure 5 Schematic diagram of the connection between the valve body mounting seat and the pushing and correcting mechanism in a production device for a low-leakage ball valve according to the present invention;

[0031] Figure 6 Schematic diagram of the structure of the lifting frame and the elastic pressing frame in a production device for a low-leakage ball valve according to the present invention;

[0032] Figure 7 Schematic diagram of the structure of the elastic pressing frame and the plugging and cleaning mechanism in a production device for a low-leakage ball valve according to the present invention;

[0033] Figure 8 Schematic diagram of the completed assembly of the ball valve in a production device for a low-leakage ball valve according to the present invention.

[0034] Explanation of reference numerals:

[0035] 1. Frame; 101. Guide groove; 102. Linear guide rail; 2. Conveying table; 201. Horizontal hydraulic push rod; 203. Brake rod; 204. Positioning hole; 3. Valve body mounting seat; 301. Air inlet hole; 4. Pushing and correcting mechanism; 401. Clamping plate; 402. Top spring; 403. Pull rod; 404. Hook; 5. Lifting frame; 501. Vertical hydraulic push rod; 502. Driving rack; 503. Positioning column; 6. Valve stem plugging fixture; 7. Elastic pressing frame; 701. Limit insertion rod; 702. Buffer spring; 703. Observation port; 8. Plugging and cleaning mechanism; 801. Moving bracket; 802. Cleaning column; 803. Return spring; 804. Transmission gear; 805. Pulling rope; 9. Elastic airbag; 901. Air nozzle; 10. Valve body; 11. Valve stem. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0037] See also Figure 1-8 A production device for a low-leakage ball valve provided by an embodiment of the invention comprises a frame 1 and a conveying platform 2, which is horizontally slidably installed at the bottom of the frame 1, a valve body mounting seat 3 is installed on the top of the conveying platform 2, a push correction mechanism 4 is installed on one side of the valve body mounting seat 3, and a lifting frame 5 is vertically slidably installed on the frame 1, and a valve stem plug-in clamp 6 and an elastic pressure frame 7 are installed at the bottom of the lifting frame 5, and a plug-in cleaning mechanism 8 connected to the lifting frame 5 by transmission is installed on the elastic pressure frame 7. When the conveying platform 2 moves to the assembly station, the push correction mechanism 4 pre-calibrates the position of the valve body 10, and then when the elastic pressure frame 7 abuts against the conveying platform 2, the lifting frame 5 drives the plug-in cleaning mechanism 8 to be inserted into the plug hole of the valve stem 11 on the calibrated valve body 10 and then pulled out during the descent of the lifting frame 5.

[0038] Specifically, the frame 1 adopts an L-shaped frame, the conveying platform 2 slides on its horizontal section, the lifting frame 5 rises and falls on its vertical section, the valve body mounting seat 3 is fixed on the upper surface of the conveying platform 2, and the top of the valve body mounting seat 3 is provided with a placement hole for inserting the ball valve body 10. During production and assembly, the valve body 10 is first inserted into the placement hole and installed on the valve body mounting seat 3 of the conveying platform 2, and the plug-in part of the valve stem 11 on the valve body 10 is placed in the pushing correction mechanism 4, and then the conveying platform 2 is translated to the assembly station. During the movement, the position of the plug-in hole of the valve stem 11 on the valve body 10 is pre-calibrated by the pushing correction mechanism 4 to ensure that the plug-in direction of the valve stem 11 is aligned with the movement axis of the plug-in cleaning mechanism 8. When the conveying platform 2 arrives at the assembly station, the lifting frame 5 When the lifting frame 5 starts to descend, the elastic pressure frame 7 first contacts with the conveying platform 2, and buffers the contact impact through elastic deformation. The plug-in cleaning mechanism 8 is inserted into the plug hole of the valve stem 11 as the lifting frame 5 descends, and is automatically pulled out after the inner wall of the plug hole is cleaned, completing the cleaning and secondary calibration of the plug hole of the valve stem 11 in the valve body 10. Finally, the valve stem 11 is clamped by the valve stem plug-in fixture 6 to assemble it into the cleaned ball valve body 10, allowing the valve stem 11 body to pass through the inside of the ball valve body 10, completing the assembly production of the valve body 10 and the valve stem 11 body. The edge of the flow-blocking structure on the valve stem 11 body is arc-shaped. After the assembly is completed, its arc-shaped surface contacts the inner wall of the valve body 10, preventing the internal gas or liquid of the ball valve from leaking from the plug-in joint of the valve stem 11, thereby improving the overall sealing performance.

[0039] Compared with the prior art, in the embodiment of the present invention, by setting a dynamic pre-calibration mechanism, the pushing and correcting mechanism 4 performs real-time angle correction on the valve body 10 during the movement of the conveying table 2, integrating the calibration process into the conveying process, enabling the valve body 10 to have a certain degree of deviation when placed, being able to meet the working environment with low placement accuracy, saving the docking time of the subsequent plugging and cleaning mechanism 8, ensuring the plugging accuracy. The plugging and cleaning mechanism 8 will synchronously complete the deep cleaning of the valve stem 11 insertion hole on the valve body 10 when the lifting frame 5 descends, and at the same time use the plugging and cleaning mechanism 8 to further correct the deviation of the valve body 10, ensuring that the valve stem plugging fixture 6 will not overly damage the integrity of the internal sealing structure of the valve body 10 during the process of clamping the valve stem 11 for plugging.

[0040] In a further embodiment of the present invention, a horizontal hydraulic push rod 201 and a vertical hydraulic push rod 501 are respectively installed on the frame 1. The end of the horizontal hydraulic push rod 201 is connected to one side of the conveying table 2, and the end of the vertical hydraulic push rod 501 is connected to the top of the lifting frame 5. Specifically, the horizontal hydraulic push rod 201 is installed on the back of the frame 1, and the end of its piston rod is rigidly connected to one side of the conveying table 2, used to drive the conveying table 2 to reciprocate horizontally on the frame 1. The vertical hydraulic push rod 501 is installed on the top of the frame 1, and the end of its piston rod is fixed to the top of the lifting frame 5, used to control the vertical lifting of the lifting frame 5. When the conveying table 2 reaches the assembly station, the horizontal hydraulic push rod 201 locks to keep the position of the conveying table 2 unchanged.

[0041] In a further embodiment of the present invention, a linear guide rail 102 adapted to the conveying table 2 is fixedly connected to the frame 1. Brake rods 203 are inserted on both sides of the conveying table 2. The pushing and correcting mechanism 4 squeezes the brake rods 203 to make them abut and cooperate with the linear guide rail 102. Specifically, the linear guide rail 102 is fixedly parallel to the frame 1 and is consistent with the moving direction of the conveying table 2. When the conveying table 2 reaches the assembly station, the pushing and correcting mechanism 4 can not only correct the position of the valve body 10, but also synchronously push the two brake rods 203 on both sides, making the brake rods 203 generate contact pressure with the side surface of the linear guide rail 102, and achieving the stability of the conveying table 2 through friction. After the position of the conveying table 2 is fixed, the vertical hydraulic push rod 501 drives the lifting frame 5 to descend, sequentially completing the hole cleaning and the stable assembly of the valve stem 11. After the assembly is completed, the conveying table 2 is then moved away from the assembly station so that the brake rods 203 are not squeezed by the pushing and correcting mechanism 4, releasing the pressing on the linear guide rail 102.

[0042] In a further embodiment of the present invention, the pushing and correcting mechanism 4 includes clamping plates 401 symmetrically installed on the valve body mounting seat 3. A top spring 402 is installed between the clamping plates 401 and the valve body mounting seat 3. Specifically, when the conveying table 2 moves, the valve body 10 contacts the clamping plates 401 due to inertial deviation. The top spring 402 is compressed to generate an adaptive clamping force, continuously correcting the position of the valve body 10. By means of elastic clamping for azimuth calibration, it can avoid the problem of wear of the valve body 10 caused by the deviation of the valve body 10 and the inability to dynamically compensate when the plugging and cleaning mechanism 8 is inserted into the valve body 10, and can have a certain buffering effect to enable the secondary guiding of the plugging and cleaning mechanism 8 to be successfully completed.

[0043] In a further embodiment of the present invention, pull rods 403 are symmetrically and slidably installed on one side of the valve body mounting seat 3. A guiding groove 101 is formed at the bottom of the frame 1. A hook 404 is installed on the back of the clamping plate 401 and is hooked to the top end of the pull rod 403. The bottom end of the pull rod 403 is inserted into the guiding groove 101. When a pair of pull rods 403 are translated along the guiding groove 101 to the assembly station, they approach each other. Specifically, the guiding groove 101 is formed at the bottom of the frame 1 and is a V-shaped tapered track symmetrically distributed. The opening direction of the hook 404 faces downward and is hooked on the top of the pull rod 403. The inside of the hook 404 has a space for the translational movement of the pull rod 403. Before the entire conveying table 2 moves to the assembly station, the guiding groove 101 forces a pair of pull rods 403 to move away from each other and be in an open state, forcing the distance between the two clamping plates 401 to become larger, thereby facilitating the rapid placement of the valve body 10 on the valve body mounting seat 3. When the conveying table 2 moves towards the assembly station, a pair of pull rods 403 will approach each other under the guidance of the guiding groove 101. Before the pull rod 403 contacts the back of the clamping plate 401, the clamping plate 401 completes the elastic calibration of the valve body 10 through the top spring 402. At this time, the rigid collision between the plugging and cleaning mechanism 8 and the valve body 10 can be avoided. Until the conveying table 2 reaches the assembly station, the pull rod 403 then contacts the back of the clamping plate 401 to apply a stable lateral pressure to firmly fix the valve body 10, thereby ensuring that the valve body 10 that has been calibrated multiple times during the plugging process of the valve stem 11 cannot be displaced.

[0044] In a further embodiment of the present invention, on one side of the top of the elastic pressing frame 7, limiting insertion rods 701 are symmetrically and fixedly connected. The top of the limiting insertion rods 701 penetrates through the lifting frame 5, and a buffer spring 702 is sleeved outside the limiting insertion rods 701, with both ends of the buffer spring 702 abutting against the elastic pressing frame 7 and the lifting frame 5 respectively. An observation port 703 is formed between a pair of limiting insertion rods 701 and the plugging and cleaning mechanism 8 on the top of the elastic pressing frame 7. The width of the observation port 703 is greater than the width of the valve body mounting seat 3. Specifically, the top end of the limiting insertion rod 701 passes through a preset through hole on the lifting frame 5 and forms a sliding fit with the lifting frame 5. When the lifting frame 5 drives the elastic pressing frame 7 to descend, the elastic pressing frame 7 will pass through the valve body mounting seat 3 and rest on the conveying table 2. At this time, the limiting insertion rod 701 can prevent the lifting frame 5 from shifting due to the pressure generated when the lifting frame 5 descends further. The vertical hydraulic push rod 501 drives the lifting frame 5 to descend, and the elastic pressing frame 7 first abuts against the conveying table 2 through the flexible contact of the buffer spring 702. The observation port 703 ensures that the valve body mounting seat 3 is completely exposed within the field of vision. The operator can first monitor the position of the valve body 10 in real time through the observation port 703 when the elastic pressing frame 7 is above the valve body mounting seat 3. At the initial stage of the contact between the elastic pressing frame 7 and the conveying table 2, the buffer spring 702 absorbs the impact energy through linear deformation, avoiding damage to precision components, and can gradually exert pressure on the conveying table 2 to further complete the fixation of the conveying table 2.

[0045] In a further embodiment of the present invention, the plugging and cleaning mechanism 8 includes a moving bracket 801 that is horizontally slidably connected to the elastic pressing frame 7. A cleaning column 802 is fixedly connected to the top of the moving bracket 801. The plugging end of the cleaning column 802 is in the shape of a frustum of a cone. A return spring 803 is installed between the bottom of the moving bracket 801 and the elastic pressing frame 7. Transmission gears 804 are rotatably installed on both sides of the elastic pressing frame 7. A pulling rope 805 connected to the end of the moving bracket 801 is wound around the outside of the transmission gears 804. Driving racks 502 meshing with the transmission gears 804 are symmetrically installed at the bottom of the lifting frame 5. Specifically, when the vertical hydraulic push rod 501 drives the lifting frame 5 to descend, the driving racks 502 drive the transmission gears 804 to rotate counterclockwise, and then the moving bracket 801 is horizontally pulled towards the center of the valve body 10 through the pulling rope 805, so that the cleaning column 802 is inserted into the socket of the valve stem 11. During the insertion process of the cleaning column 802, it contacts and rubs against the inner wall of the socket to discharge debris. When the moving bracket 801 moves to the limit position, the return spring 803 is compressed and stores energy. Then, as the lifting frame 5 descends further, the area without teeth on the driving rack 502 and the transmission gear 804 are at the same height. At this time, the return spring 803 releases energy to pull back the moving bracket 801, so that the cleaning column 802 is quickly pulled out of the socket of the valve stem 11 to prevent the cleaning column 802 from interfering with the assembly of the valve stem 11. The entire cleaning action is integrated into the descending stroke of the lifting frame 5, shortening the overall assembly production time.

[0046] In a further embodiment of the present invention, a positioning post 503 is fixedly connected to the bottom of the driving rack 502, and a positioning hole 204 matching the positioning post 503 is formed at the top of the conveying table 2. Specifically, the driving rack 502 can not only drive the moving bracket 801 equipped with the cleaning post 802 to move towards the valve body 10, but also insert the positioning post 503 into the positioning hole 204 on the conveying table 2 before the valve stem is inserted into the fixture 6 for valve stem 11 assembly. This not only further locks the position of the conveying table 2, but also can prevent the offset generated during the reciprocating lifting of the lifting frame 5 from affecting the sealing performance of the assembled ball valve. If the position of the lifting frame 5 or the conveying table 2 deviates too much, the height of the valve stem insertion fixture 6 will not be sufficient for it to enter the valve body 10 to complete the assembly of the valve stem 11, thereby improving the yield rate.

[0047] In a further embodiment of the present invention, an elastic airbag 9 is installed on the top of the elastic pressing frame 7, and an air delivery hole 301 communicating with the elastic airbag 9 is formed on the valve body mounting seat 3. The air delivery hole 301 is communicated with the internal space of the valve body 10. When the bottom of the elastic pressing frame 7 abuts against the top surface of the conveying table 2, the elastic airbag 9 is communicated with the air delivery hole 301. Specifically, the elastic airbag 9 is hollow inside, and an air nozzle 901 embedded in the elastic pressing frame 7 is provided at the bottom. The position of the air nozzle 901 is on the inner wall of the observation port 703. After the elastic abutting frame contacts the conveying table 2, the air nozzle 901 of the elastic airbag 9 and the air delivery hole 301 on the valve body mounting seat 3 are on the same horizontal line and are communicated with each other. At this time, as the lifting frame 5 further descends to squeeze the elastic airbag 9, the gas stored in the elastic airbag 9 will be blown into the valve body 10 through the air nozzle 901 and the air delivery hole 301 to clean the residual waste chips in the valve body 10 before the valve stem 11 is assembled.

[0048] A production method of a low-leakage ball valve production device includes the following steps:

[0049] S1. First, install the valve body 10 on the valve body mounting seat 3 of the conveying table 2, and make the part of the valve stem 11 inserted on the valve body 10 be in the pressing and correcting mechanism 4;

[0050] S2. Move the conveying table 2 to the assembly station, and pre-calibrate the orientation of the valve stem 11 insertion hole on the valve body 10 through the pressing and correcting mechanism 4 during the movement;

[0051] S3. When the conveying table 2 reaches the assembly station, the lifting frame 5 starts to descend until the elastic pressing frame 7 abuts against the conveying table 2;

[0052] S4. The lifting frame 2 continues to descend, driving the plugging and cleaning mechanism 8 to insert into the pre-calibrated insertion hole and then pull out, completing the cleaning and secondary calibration of the valve stem 11 insertion hole;

[0053] S5. Assemble the valve stem 11 into the cleaned jack through the valve stem insertion fixture 6 to complete the assembly production of the ball valve body 10 and the valve stem 11.

[0054] Only some exemplary embodiments of the present invention are described by way of illustration above. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A production device for a low-leakage ball valve, comprising a frame (1), characterized in that, Also includes: A conveying platform (2) is horizontally slidably mounted on the bottom of the frame (1); a valve body mounting seat (3) is mounted on the top of the conveying platform (2); and a push correction mechanism (4) is mounted on one side of the valve body mounting seat (3); A lifting frame (5) is vertically slidably mounted on the frame (1), and a valve stem plug-in fixture (6) and an elastic pressure frame (7) are mounted at the bottom of the lifting frame (5), and a plug-in cleaning mechanism (8) which is transmission-connected to the lifting frame (5) is mounted on the elastic pressure frame (7); When the conveying platform (2) is moved to the assembly station, the push correction mechanism (4) pre-calibrates the valve body position, and then when the elastic pressure frame (7) contacts the conveying platform (2), the lifting frame (5) descends and drives the plug-in cleaning mechanism (8) to insert into the valve stem insertion hole on the calibrated valve body and then pull it out.

2. The production device of a low-leakage ball valve according to claim 1, characterized in that, A horizontal hydraulic push rod (201) and a vertical hydraulic push rod (501) are respectively mounted on the frame (1); the end of the horizontal hydraulic push rod (201) is connected to one side of the conveying platform (2), and the end of the vertical hydraulic push rod (501) is connected to the top of the lifting frame (5).

3. The production device of a low-leakage ball valve according to claim 1, characterized in that, A linear guide rail (102) adapted to the conveying platform (2) is fixedly connected to the frame (1), brake rods (203) are inserted on both sides of the conveying platform (2), and the pushing correction mechanism (4) squeezes the brake rod (203) to make it abut against the linear guide rail (102).

4. The production device of a low-leakage ball valve according to claim 1, characterized in that, The push correction mechanism (4) comprises a clamping plate (401) symmetrically mounted on the valve body mounting seat (3), and a top spring (402) is installed between the clamping plate (401) and the valve body mounting seat (3).

5. The production device of a low-leakage ball valve according to claim 4, characterized in that, A pulling rod (403) is symmetrically and slidably mounted on one side of the valve body mounting seat (3); a guide groove (101) is provided at the bottom of the frame (1); a hook (404) connected to the top of the pulling rod (403) is mounted on the back of the clamping plate (401); the bottom end of the pulling rod (403) is inserted into the guide groove (101); a pair of pulling rods (403) move toward each other when they are translated along the guide groove (101) to the assembly station.

6. The production device of a low-leakage ball valve according to claim 1, characterized in that, A limiting plug rod (701) is symmetrically fixedly connected to one side of the top of the elastic pressure frame (7), the top of the limiting plug rod (701) passes through the lifting frame (5), and a buffer spring (702) is provided on the outer shell of the limiting plug rod (701) with two ends respectively abutting against the elastic pressure frame (7) and the lifting frame (5), and an observation port (703) is opened at the top of the elastic pressure frame (7) between the pair of limiting plug rods (701) and the plug-in cleaning mechanism (8).

7. The production device of a low-leakage ball valve according to claim 1, characterized in that, The plugging and cleaning mechanism (8) includes a moving bracket (801) that is horizontally slidably connected to the elastic pressing frame (7). A cleaning column (802) is fixedly connected to the top of the moving bracket (801). A return spring (803) is installed between the bottom of the moving bracket (801) and the elastic pressing frame (7). Transmission gears (804) are rotatably installed on both sides of the elastic pressing frame (7). A pulling rope (805) connected to the end of the moving bracket (801) is wound around the outside of the transmission gears (804). Driving racks (502) meshing with the transmission gears (804) are symmetrically installed at the bottom of the lifting frame (5).

8. The production device of a low-leakage ball valve according to claim 7, wherein A positioning column (503) is fixedly connected to the bottom of the driving rack (502). A positioning hole (204) matching the positioning column (503) is formed in the top of the conveying table (2).

9. The production device of a low-leakage ball valve according to claim 6, characterized in that, An elastic airbag (9) is installed on the top of the elastic pressing frame (7). An air injection hole (301) communicating with the elastic airbag (9) is formed in the valve body mounting seat (3). When the bottom of the elastic pressing frame (7) abuts against the top surface of the conveying table (2), the elastic airbag (9) communicates with the air injection hole (301).

10. The production method of a production device for a low-leakage ball valve according to any one of claims 1-9, characterized in that, It includes the following steps: S1. First, install the valve body on the valve body mounting seat (3) of the conveying table (2), and make the part where the valve stem of the valve body is inserted be in the pushing and correcting mechanism (4). S2. Move the conveying table (2) to the assembly station. During the movement, pre-calibrate the orientation of the valve stem insertion hole on the valve body through the pushing and correcting mechanism (4). S3. When the conveying table (2) reaches the assembly station, the lifting frame (5) starts to descend until the elastic pressing frame (7) abuts against the conveying table (2). S4. The lifting frame (2) continues to descend, driving the plugging and cleaning mechanism (8) to insert into the pre-calibrated insertion hole and then pull out, completing the cleaning and secondary calibration of the valve stem insertion hole. S5. Assemble the valve stem into the cleaned insertion hole through the valve stem plugging fixture (6) to complete the assembly production of the ball valve body and the valve stem.

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