A valve seat removal tool

Abstract

The present invention discloses a valve seat removal tool, comprising a positioning device, the end of which is fixedly connected to an outer sleeve (1), the inner threads of which engage a twisting barrel, and a movable device disposed within the twisting barrel; one end of the movable device extends beyond the twisting barrel and is connected to a gripping structure, the gripping action of the gripping structure being linked to the action of the movable device. The present invention facilitates valve body removal through the action of the positioning device, the outer sleeve (1), the twisting barrel, the movable device, and the pressing structure, thereby improving valve body maintenance efficiency.

Description

Technical Field

[0001] The invention relates to the field of valve disassembly and repair tools, and in particular to a valve seat disassembly tool. Background Art

[0002] The two end faces of the manual flat valve disc are sealing surfaces. The valve seat uses a wave spring to preload the valve disc. The seal is achieved by the free fit between the valve disc and the valve seat and the sealing grease, and under the action of the medium pressure. The valve disc can be raised or lowered by turning the handwheel, which plays the role of connecting or disconnecting the medium transmission channel. Repair and maintenance of flat valves require the removal of the valve seat and replacement of the seal. However, when removing the valve seat of the flat valve, the valve disc must be removed first. At this time, it is advisable to stretch the valve seat away from the valve disc and compress the wave spring to separate the valve disc and the valve seat. Without damaging the valve disc, remove the valve disc first, then remove the valve seat and seal. When reinstalling the valve disc, the steps are exactly the opposite of removal. First, fill the valve seat, then stretch the valve seat away from the valve disc and compress the wave spring to leave enough space between the two valve seats so that the valve disc can be installed smoothly.

[0003] During this process, since there are currently no special disassembly and assembly tools and the operating space is very small, there are great operational risks whether the valve seat is removed or reinstalled, which can easily cause injury to the operator's fingers and damage to the valve seat, and is time-consuming and labor-intensive, with very low disassembly and assembly efficiency; at the same time, some existing valve seat disassembly and assembly tools have complex structures, and generally require process grooving or drilling of the inner wall of the valve seat before the tool can be used to clamp and pull the valve seat, which will cause a certain degree of damage to the valve seat and is not conducive to ensuring the integrity of the valve seat; therefore, we need to set up a disassembly and assembly tool that can directly penetrate into the valve seat and can be pulled without grooving the valve seat. Summary of the Invention

[0004] The purpose of the present invention is to solve the shortcomings of the prior art and to provide a valve seat disassembly tool.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a valve seat removal tool, comprising a positioning device, the end of which is fixedly connected to an outer sleeve, the inner thread of the outer sleeve is engaged with a twisting barrel, and a moving device is provided inside the twisting barrel;

[0006] One end of the moving device extends out of the torsion barrel and is connected with a grabbing structure. The grabbing action of the grabbing structure is linked with the action of the moving device. The grabbing structure is a top-pressing structure.

[0007] As a further description of the above technical solution:

[0008] The positioning device includes a positioning column, which is disc-shaped and has a center hole at the end face. The outer wall of the outer sleeve is fixedly connected to the inner wall of the center hole. The outer side surface of the positioning column is movably connected to a magnetic block through a fixed seat. The magnetic blocks are distributed in a cross shape around the positioning column. The end of the positioning column close to the valve body is covered with a rubber layer.

[0009] As a further description of the above technical solution:

[0010] The inner side wall of the outer sleeve is provided with an internal thread, the twist cylinder includes a threaded cylinder, the outer side of the threaded cylinder is provided with an external thread, the internal thread cooperates with the external thread, one end of the threaded cylinder extends out of the outer sleeve and is fixedly connected to a first handle.

[0011] As a further description of the above technical solution:

[0012] The moving device includes a threaded rod, a second handle, and a moving frame. The threaded rod is rotatably connected to the inner side wall of the threaded barrel through a bearing frame. The moving frame is axially slidably connected to the inner side wall of the threaded barrel through a limiting frame. A threaded hole is provided at one end of the moving frame, and the threaded rod cooperates with the threaded hole.

[0013] As a further description of the above technical solution:

[0014] The side of the threaded cylinder is provided with a strip notch portion, and the top pressure structure includes a rotating cylinder, one end of the rotating cylinder is fixedly connected to an incomplete gear, and the incomplete gear is movably connected to the inner side of the strip notch portion by a pin shaft, and a rack portion is provided on the side of the movable frame, and the rack portion is engaged with the incomplete gear, and the rotating cylinder has a hole groove at one end away from the incomplete gear, and the side of the hole groove has a sliding mouth, the bottom of the hole groove is fixedly connected to a second spring, the top of the second spring is fixedly connected to a pressing rod, the top of the pressing rod extends out of the hole groove, and the side of the pressing rod is fixedly connected to a connecting rod, the connecting rod is L-shaped, and has a section extending out of the sliding mouth to fit the side wall of the pressing rod, and the end of the movable frame is fixedly connected to a limiting block.

[0015] As a further description of the above technical solution:

[0016] The movable frame has a section of protruding threaded cylinder, and the end portion is fixedly connected with an inner hook. The side surface of the movable frame is sleeved with a compression rubber cylinder and a ring sheet, and the ring sheet is located between the inner hook and the compression rubber cylinder.

[0017] As a further description of the above technical solution:

[0018] There are multiple strip-shaped notch portions and rotating cylinders, which are arranged in a circular array.

[0019] As a further description of the above technical solution:

[0020] The movable frame has a section of protruding threaded cylinder, and the end portion is fixedly connected with an inner hook. The side surface of the movable frame is sleeved with a compression rubber cylinder and a ring sheet, and the ring sheet is located between the inner hook and the compression rubber cylinder.

[0021] The present invention has the following beneficial effects:

[0022] 1. Compared with the prior art, this valve seat removal tool fixes the positioning device in the valve body through the cooperation of the positioning device, the outer sleeve, the twisting cylinder, the moving device and the pressing structure, and then rotates the twisting cylinder to move the constant pressure device to the required position. Then, under the action of the moving device, the pressing rod can be rotated from a horizontal state to a vertical state, so that the pressing rod can stably squeeze the valve seat. In this way, when the twisting cylinder is rotated in the opposite direction, the valve seat can be moved away from the squeezing of the valve plate under the action of the pressing rod, thereby facilitating the removal of the valve plate. At the same time, when the device is to be removed, it is only necessary to rotate the second handle in the opposite direction to fold the rotating cylinder into the twisting cylinder, so that the entire device is easy to take out, which greatly improves the efficiency of disassembling and assembling the device and also improves the efficiency of repairing the valve body.

[0023] 2. Compared with the prior art, this valve seat disassembly tool fixes the positioning device in the valve body through the cooperation of the positioning device, the outer sleeve, the twisting cylinder, the moving device and the expansion structure, and then rotates the twisting cylinder to move the constant pressure device to the required position. Then, under the action of the moving device, the compressed rubber cylinder can be expanded and pressed against the inner wall of the valve seat. Then, the twisting cylinder is rotated in the opposite direction. Under the action of the compressed rubber cylinder, the valve seat can be moved away from the squeezing of the valve plate, thereby facilitating the removal of the valve plate. At the same time, when the device needs to be removed, it is only necessary to rotate the second handle in the opposite direction to fold the rotating cylinder into the twisting cylinder, which makes it easy to take out the entire device, greatly improving the efficiency of disassembling and assembling the device, and also improving the efficiency of repairing the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional diagram of a valve seat removal tool proposed by the present invention;

[0025] Figure 2 for Figure 1 Enlarged view of part B;

[0026] Figure 3 This is a front cross-sectional view of a first embodiment of a valve seat removal tool proposed by the present invention;

[0027] Figure 4 for Figure 3 Enlarged view of part A;

[0028] Figure 5 for Figure 3 Enlarged view of part C in the middle;

[0029] Figure 6 for Figure 5 Enlarged view of part D in the middle;

[0030] Figure 7 A three-dimensional diagram of a valve seat removal tool according to a first embodiment of the present invention;

[0031] Figure 8 This is a three-dimensional diagram of a second embodiment of a valve seat removal tool proposed by the present invention.

[0032] Legend:

[0033] 1. Valve body; 101. Flange; 102. Valve seat; 103. Valve plate; 104. First spring; 2. Positioning device; 201. Positioning column; 202. Fixed seat; 203. Magnetic block; 3. Outer sleeve one; 4. Torsion cylinder; 401. First handle; 402. Threaded cylinder; 403. Strip notch; 5. Moving device; 501. Threaded rod; 502. Bearing frame; 503. Second handle; 504. Moving frame; 505. Limiting frame; 6. Top pressure structure; 601. Rotating cylinder; 602. Top pressure rod; 603. Connecting rod; 604. Second spring; 605. Rack; 606. Pin; 607. Limiting block; 608. Incomplete gear; 7. Expansion structure; 701. Compression rubber cylinder; 702. Ring piece; 703. Inner hook. DETAILED DESCRIPTION

[0034] Reference Figure 1 、 Figure 3 , valve body 1, a first spring 104, a valve seat 102, and a valve plate 103 are provided in the valve body 1. There are two valve seats 102, and both are slidingly connected to the inner cavity of the valve body 1. The valve plate 103 is located between the two valve seats 102. The first spring 104 is connected between the outer end of the valve plate 103 and the inner wall of the valve body 1. The first spring 104 gives the valve seat 102 a force to squeeze the valve plate 103. The existing valve body structure is not described here.

[0035] Example 1

[0036] refer to Figure 1-7 A valve seat removal tool includes a positioning device 2, which is pressed against the port of the valve body 1 to achieve the positioning of the device. The end of the positioning device 2 is fixedly connected to an outer sleeve 3, and the internal thread of the outer sleeve 3 is matched with a twisting cylinder 4. By rotating the twisting cylinder 4, a linear movement can be achieved, driving the twisting cylinder 4 and the internal moving device 5 to move linearly. The moving device 5 is provided inside the twisting cylinder 4;

[0037] One end of the moving device 5 extends out of the torsion cylinder 4 and is connected to a grabbing structure. The grabbing action of the grabbing structure is linked to the action of the moving device 5. The grabbing action of the grabbing structure is realized by utilizing the action of the moving device 5. The control is relatively convenient. The grabbing structure adopts a top pressure structure 6.

[0038] Specifically, the positioning device 2 includes a positioning column 201, which is disc-shaped and has a center hole at its end face. The outer wall of the outer sleeve 3 is fixedly connected to the inner wall of the center hole. The outer side surface of the positioning column 201 is movably connected to a magnetic block 203 through a fixed seat 202. The magnetic block 203 is distributed in a cross shape around the positioning column 201. The magnetic block 203 can be rotated upward to open and magnetically adsorbed on the valve body port to achieve the purpose of stably fixing the device. The end of the positioning column 201 close to the valve body 1 is covered with a rubber layer, which mainly serves to protect the valve body port.

[0039] Specifically, the inner side wall of the outer sleeve 3 is provided with an internal thread, and the torque cylinder 4 includes a threaded cylinder 402. The outer side surface of the threaded cylinder 402 is provided with an external thread. The internal thread cooperates with the external thread. One end of the threaded cylinder 402 extends out of the outer sleeve 3 and is fixedly connected to the first handle 401. The user can manually rotate the first handle 401 to drive the threaded cylinder 402 to rotate, so that the threaded cylinder 402 and the torque cylinder 4 rotate relative to each other. Under the action of the threaded teeth, the rotation is converted into axial linear motion, driving the movement of the torque cylinder 4.

[0040] Specifically, the moving device 5 includes a threaded rod 501, a second handle 503, and a moving frame 504. The threaded rod 501 is rotatably connected to the inner wall of the threaded cylinder 402 through a bearing frame 502. The bearing frame 502 plays a supporting role. The threaded rod 501 and the threaded cylinder 402 are coaxially arranged. The moving frame 504 is axially slidably connected to the inner wall of the threaded cylinder 402 through a limiting frame 505. In this embodiment, the end of the moving frame 504 is susceptible to an inward squeezing force (during the support process of the lower pressing rod 602, a reaction force will be exerted on it, forming a force to squeeze the moving frame 504 inward). The frame 505 is configured as a sliding seat structure, and is preferably configured at a connection point near the pin shaft 606. A threaded hole is provided at one end of the movable frame 504, and the threaded rod 501 cooperates with the threaded hole. The second handle 503 is fixedly connected to the end of the threaded rod 501 located on the outside. When the user controls the second handle 503 and the threaded rod 501 to rotate, the movable frame 504 is axially slidably connected to the threaded barrel 402 to limit the rotation of the movable frame 504. At this time, the relative rotation of the inner teeth of the threaded hole and the outer teeth of the threaded barrel 402 is converted into controlling the axial movement of the movable frame 504, thereby achieving the purpose of movement.

[0041] Specifically, a strip-shaped notch portion 403 is provided on the side of the threaded cylinder 402, and the top-pressing structure 6 includes a rotating cylinder 601, and one end of the rotating cylinder 601 is fixedly connected to an incomplete gear 608, and the incomplete gear 608 is movably connected to the inner side of the strip-shaped notch portion 403 through a pin shaft 606. The incomplete gear 608 and the rotating cylinder 601 can rotate around the pin shaft 606 and rotate to the inside of the strip-shaped notch portion 403 or rotate to be perpendicular to the threaded cylinder 402. A rack portion 605 is provided on the side of the movable frame 504, and the rack portion 605 engages with the incomplete gear 608. The linear movement of the movable frame 504 will drive the rack portion 605 to move, and under the action of the teeth, the incomplete gear 608 and the rotating cylinder 601 are driven to rotate to achieve a control effect. The rotating cylinder 601 has a hole groove on the end away from the incomplete gear 608, and the side of the hole groove has a sliding mouth, and the bottom of the hole groove is fixedly connected to a second spring. 604, the top end of the second spring 604 is fixedly connected to the push rod 602, and the second spring 604 pulls the push rod 602 to slide inside the hole groove, that is, in the natural state, the top protruding part of the push rod 602 is relatively small, and the top of the push rod 602 protrudes from the hole groove, and the side of the push rod 602 is fixedly connected to the connecting rod 603. The connecting rod 603 is L-shaped and has a section of protruding sliding groove that fits with the side wall of the push rod 602. The end of the movable frame 504 is fixedly connected to the limit block 607. When the control rotating cylinder 601 is transmitted to be perpendicular to the threaded cylinder 402, the bottom end of the connecting rod 603 will hit the side of the movable frame 504 or the limit block 607. At this time, the upper part of the connecting rod 603 will slide inside the sliding groove, giving the lower push rod 602 a force to slide outward, overcoming the elastic force of the second spring 604, so that the lower push rod 602 extends upward, further tightening the inner wall of the valve seat 102.

[0042] Furthermore, there are multiple strip-shaped notch portions 403 and rotating cylinders 601, and they are arranged in a circular array, so that the force is more uniform and the grip is more secure. A rubber pad can be added to the end of the lower pressure rod 602 to avoid damage to the inner wall of the valve seat 102 during the gripping process.

[0043] When using the present invention, first embed the positioning in the valve body 1, and then rotate the magnetic block 203, which will cause the magnetic block 203 to be adsorbed on the flange 101, so that the positioning column 201 can be positioned and fixed. Then, rotate the first handle 401, so that the threaded cylinder 402 rotates and moves, so that it can be used for valve bodies of different specifications. When it reaches the appropriate position, stop rotating the first handle 401, and then rotate the second handle 503, thereby driving the threaded rod 501 to rotate. Under the action of the threaded fit, the movable frame 504 is driven to move to the left, and the rack 505 is moved to the left. As the rack 505 moves to the left, the pin 606 causes the incomplete gear 608 to rotate clockwise, thereby driving the rotating cylinder 601 to rotate clockwise, so that the rotating cylinder 601 can be rotated from a horizontal state to a vertical state, thereby driving When the first handle 401 is rotated in the opposite direction, the threaded cylinder 402 can be withdrawn outward, and then the valve seat 102 can be slid in the valve body 1 under the action of the pushing rod 602. As the valve seat 102 moves, the first spring 104 is squeezed, and the movement of the valve seat 102 also makes the valve seat 102 move away from the valve plate 103, so that a gap is generated between the valve plate 103 and the valve seat 102, so that the valve plate 103 can be easily lifted up to complete the disassembly. When the maintenance is completed and the valve plate 103 needs to be reinstalled, the above process can be reversed.

[0044] Example 2

[0045] Reference Attachment Figure 1-Figure 3 、 Figure 7 , the difference from the above embodiment is that the top pressure structure 6 is replaced by an expansion structure 7, specifically, the movable frame 504 has a section of protruding threaded tube 402 to facilitate the installation of the compression rubber tube 701 and the ring piece 702, the end of the movable frame 504 is fixedly connected to the inner hook 703, the side of the movable frame 504 is sleeved with the compression rubber tube 701 and the ring piece 702, the ring piece 702 is located between the inner hook 703 and the compression rubber tube 701, when the movable frame 504 moves, it will drive the inner hook 703 to move, pulling the ring piece 702 and the compression rubber tube 701 inward, and the other end of the compression rubber tube 701 is pressed against the end of the threaded tube 402, thereby squeezing and expanding the compression rubber tube 701, thereby pressing against the inner wall of the valve seat 102.

[0046] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve seat removal tool, characterized in that: It comprises a positioning device (2), the end of the positioning device (2) is fixedly connected to an outer sleeve (3), the inner thread of the outer sleeve (3) is matched with a twisting cylinder (4), and the interior of the twisting cylinder (4) is provided with a moving device (5); One end of the moving device (5) extends out of the twisting cylinder (4) and is connected to a grabbing structure, wherein the grabbing action of the grabbing structure is linked to the action of the moving device (5); the grabbing structure is a pressing structure (6); The moving device (5) comprises a threaded rod (501), a second handle (503), and a moving frame (504); the threaded rod (501) is rotatably connected to the inner side wall of the threaded barrel (402) via a bearing frame (502); the moving frame (504) is axially slidably connected to the inner side wall of the threaded barrel (402) via a limiting frame (505); a threaded hole is provided at one end of the moving frame (504); the threaded rod (501) is engaged with the threaded hole; The side of the threaded cylinder (402) is provided with a strip-shaped notch portion (403), the top-pressing structure (6) includes a rotating cylinder (601), one end of the rotating cylinder (601) is fixedly connected with an incomplete gear (608), the incomplete gear (608) is movably connected to the inner side of the strip-shaped notch portion (403) through a pin shaft (606), the side of the movable frame (504) is provided with a rack portion (605), the rack portion (605) is engaged with the incomplete gear (608), and the rotating cylinder (601) is away from the incomplete gear One end of (608) has a hole groove, and the side of the hole groove has a sliding mouth, the bottom of the hole groove is fixedly connected to a second spring (604), the top of the second spring (604) is fixedly connected to a push rod (602), the top of the push rod (602) extends out of the hole groove, the side of the push rod (602) is fixedly connected to a connecting rod (603), the connecting rod (603) is L-shaped, and has a section extending out of the sliding mouth to fit with the side wall of the push rod (602), and the end of the movable frame (504) is fixedly connected to a limiting block (607).

2. A valve seat removal tool according to claim 1, characterized in that: The positioning device (2) includes a positioning column (201), the positioning column (201) is disc-shaped and has a center hole at its end face, the outer wall of the outer sleeve (3) is fixedly connected to the inner wall of the center hole, the outer side surface of the positioning column (201) is movably connected to a magnetic block (203) through a fixing seat (202), and the magnetic block (203) is distributed in a cross shape around the positioning column (201).

3. The valve seat removal tool according to claim 1, characterized in that: The inner side wall of the outer sleeve (3) is provided with an internal thread, and the twisting cylinder (4) includes a threaded cylinder (402). The outer side surface of the threaded cylinder (402) is provided with an external thread, and the internal thread cooperates with the external thread. One end of the threaded cylinder (402) extends out of the outer sleeve (3) and is fixedly connected to the first handle (401).

4. The valve seat removal tool according to claim 1, characterized in that: The strip-shaped notch portion (403) and the rotating cylinder (601) are both provided in plurality and arranged in a circular array.

5. The valve seat removal tool according to claim 1, characterized in that: The movable frame (504) has a section of protruding threaded tube (402), and the end portion is fixedly connected to an inner hook (703). The side surface of the movable frame (504) is sleeved with a compression rubber tube (701) and a ring piece (702), and the ring piece (702) is located between the inner hook (703) and the compression rubber tube (701).

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