Rotary dismounting tool for valve seat

Abstract

The utility model relates to the technical field of valve seat dismounting tools, in particular to a rotary dismounting tool for a valve seat, which comprises a sleeve body, a driving rod and a pushing piece, the sleeve body is used for being inserted into a mounting cavity of a valve body and penetrating through an inner hole of the valve seat, and the lower end of the driving rod penetrates through the sleeve body and is connected with the pushing piece. At least two telescopic rods are arranged on the side wall of the lower portion of the sleeve body in a sliding mode and located on the side portions of the pushing pieces correspondingly, and the pushing pieces can rotate along with the driving rod when the driving rod rotates relative to the sleeve body and push the telescopic rods to stretch out so as to drag up the valve seat. According to the design of the dismounting tool, the valve seat can be effectively pulled up, and the valve seat is driven by the sleeve body of the dismounting tool to be dismounted from the interior of the valve body, so that the valve seat is rapidly dismounted, the problem that maintenance is difficult due to the fact that the valve seat cannot be taken out is solved, and the purpose of prolonging the service life of the valve is achieved by replacing the valve seat.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve seat disassembly tools, and specifically relates to a rotary disassembly tool for a valve seat. Background Art

[0002] During the use of a valve, the valve seat is prone to deformation under long-term large temperature changes. However, after deformation, the erosion of high-temperature and high-pressure media is extremely likely to wash impurities into the gap between the valve seat and the inner wall of the valve, and it is impossible to wash them away. Over time, the impurities accumulate too thickly, and it is difficult to remove the impurities and the valve seat even with temporary tools, resulting in serious deformation of the valve seat. As a result, the valve needs to be replaced, which deviates from the original intention of the replaceable valve seat design. Therefore, there is an urgent need to design a rotary disassembly tool for a valve seat to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a rotary disassembly tool for a valve seat, which solves the problem that the impurities accumulate too thickly and it is difficult to remove the impurities and the valve seat with temporary tools, resulting in serious deformation of the valve seat and the valve having to be replaced.

[0004] To solve the above technical problems, the utility model provides a rotary disassembly tool for a valve seat. The disassembly tool includes a sleeve body, a driving rod, and a pushing member. The sleeve body is used to be inserted into the installation cavity of the valve body and pass through the inner hole of the valve seat. The lower end of the driving rod is inserted into the sleeve body, and its lower end is connected to the pushing member.

[0005] The lower side wall of the sleeve body is slidably provided with telescopic rods. There are at least two telescopic rods, and they are respectively located on the side of the pushing member. The pushing member can rotate along with the driving rod relative to the sleeve body and push the telescopic rods to extend, so as to lift the valve seat.

[0006] Further, a positioning disk is provided on the outer wall of the upper part of the sleeve body. The positioning disk is threadedly connected to the sleeve body, and the diameter of the positioning disk is larger than the diameter of the installation cavity of the valve body.

[0007] Further, a stepped hole is provided on the inner wall of the upper end of the sleeve body. The stepped surface of the stepped hole fits with the upper stepped surface of the driving rod.

[0008] Further, an installation groove is provided on the inner wall of the lower end of the sleeve body, and at least two through holes communicating with the installation groove are opened on its side wall. Each through hole is respectively provided with a telescopic rod. One end of the telescopic rod is located in the installation groove and is fixedly provided with a limiting section with a diameter larger than the aperture of the through hole. The other end extends into the through hole, and the diameter of the installation groove is larger than the diameter of the inner hole of the sleeve body.

[0009] Further, the number of the through holes is two, and the disassembly tool further includes an elastic reset member for retracting the two telescopic rods. The elastic reset member is a first spring, and two ends of the first spring are respectively connected to the telescopic rods in the two through holes.

[0010] Further, a rotating handle is fixedly arranged on the upper part of the driving rod. The rotating handle is arranged horizontally and is in threaded connection with the driving rod.

[0011] Further, the pushing member is a cam. The outer periphery of the cam has a pushing surface which cooperates with the telescopic rod. The pushing surface has a first side portion and a second side portion. The distance from the first side portion to the rotation center line of the driving rod is less than the distance from the second side portion to the rotation center line of the driving rod. The distance from a point on the pushing surface to the rotation axis of the cam gradually increases from the first side portion to the second side portion.

[0012] Further, two through holes which are axially symmetric with respect to the lower end side wall of the sleeve body and are respectively communicated with the inner hole of the sleeve body are formed in the lower end side wall of the sleeve body. Each through hole is respectively provided with a telescopic rod. Two pushing surfaces which are symmetric with respect to the rotation center origin of the cam are arranged on two sides of the cam, and the two pushing surfaces respectively cooperate with the two telescopic rods. The distance between the two first side portions and the sum of the lengths of the two telescopic rods are less than the inner hole diameter of the valve seat, and the distance between the two second side portions and the sum of the lengths of the two telescopic rods are greater than the inner hole diameter of the valve seat.

[0013] Further, the tool further includes a limiting portion for limiting the rotation angle of the driving rod relative to the sleeve body.

[0014] The limiting portion includes a limiting plate and a limiting member. The limiting plate is arranged on the outer wall of the upper part of the driving rod and is fixedly connected with the driving rod. An arc-shaped limiting groove is arranged on the limiting plate. The limiting member is fixedly arranged on the top of the sleeve body and is in sliding fit with the limiting groove.

[0015] Further, one inner wall of the limiting groove is an opening limiting wall, and the other inner wall is a closing limiting wall.

[0016] When the limiting member is in fit with the opening limiting wall, the two telescopic rods extend out of the sleeve body under the pushing of the second side portion of the cam.

[0017] When the limiting member is in fit with the closing limiting wall, the first side portion of the cam faces the telescopic rod.

[0018] Beneficial effects of the utility model: The design of the disassembly tool of the utility model can effectively pull up the valve seat, so that it can be disassembled from the valve body under the drive of the sleeve of the disassembly tool, thereby realizing the rapid disassembly of the valve seat, avoiding the problem of difficult maintenance due to the inability to remove the valve seat, and achieving the purpose of increasing the service life of the valve by replacing the valve seat;

[0019] The design of the positioning plate screwed on the upper outer wall of the sleeve body can enable it to be mounted on the inlet of the valve body installation cavity. By adjusting the position of the positioning plate screwed on the outer wall of the sleeve body, the length of the sleeve body extending into the valve body installation cavity can be adjusted to meet the use requirements of different valve body installation cavity depths, while improving the stability of the disassembly tool;

[0020] The design of the stepped hole on the inner wall of the upper end of the sleeve and the mounting groove at the lower end can limit the height position of the driving rod, so that the pushing member is located in the mounting groove and between the two telescopic rods, so as to improve the rotation stability of the driving rod and the pushing member;

[0021] The design of the pusher and the upper limit portion of the driving rod can drive the driving rod and the cam to rotate when the limiter of the limiter and the arc-shaped limit groove on the limit plate are opened and closed, so that the telescopic rods on both sides extend out and can support the bottom of the valve seat to facilitate the removal of the valve seat;

[0022] The provision of the first spring can cause the two telescopic rods to retract under the action of elasticity when the first side portion is aligned with the telescopic rod, so that the disassembly tool can be quickly inserted into or disassembled from the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0024] Figure 1 It is a cross-sectional view of a valve seat installed in a valve body by a rotary disassembly tool in an embodiment of the utility model;

[0025] Figure 2 It is a cross-sectional view of a rotary disassembly tool for a valve seat in an embodiment of the utility model;

[0026] Figure 3 It is a schematic diagram of the retracting of the telescopic rod in the direction A of a rotary disassembly tool for a valve seat in an embodiment of the utility model;

[0027] Figure 4 It is a schematic diagram of a telescopic rod extending toward direction A of a rotary disassembly tool for a valve seat in an embodiment of the utility model;

[0028] Figure 5 It is a schematic diagram of the initial state of the B-direction rotation handle when the telescopic rod of a rotary disassembly tool for a valve seat in an embodiment of the present utility model is in the retracted state;

[0029] Figure 6 It is a schematic diagram of the limited state of the B-direction rotation handle when the telescopic rod of a rotary disassembly tool for a valve seat in an embodiment of the present utility model is in the extended state;

[0030] Figure 7 It is a cross-sectional view of the sleeve body of a rotary disassembly tool for a valve seat in an embodiment of the present utility model;

[0031] Figure 8 It is a schematic diagram of the telescopic rod and the second spring in other embodiments of a rotary disassembly tool for a valve seat in an embodiment of the present utility model;

[0032] In the figure: 1 - disassembly tool, 2 - valve body, 3 - valve seat, 11 - sleeve body, 12 - driving rod, 13 - pushing member, 14 - positioning disk, 15 - rotation handle, 16 - limiting plate, 17 - limiting member, 18 - telescopic rod, 19 - elastic reset member, 20 - second spring, 21 - installation cavity, 111 - stepped hole, 112 - installation groove, 113 - through hole, 131 - first side portion, 132 - second side portion, 161 - limiting groove, 1611 - opening limiting wall, 1612 - closing limiting wall. Specific embodiments

[0033] Next, in combination with the attached drawings of the specification of the present utility model, the technical solutions in the embodiments of the utility model will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0034] The following will be described in detail in combination with a specific embodiment of the present utility model and the attached Figure 1-8 Specifically, a rotary disassembly tool for a valve seat is disclosed. The disassembly tool 1 includes a sleeve body 11, a driving rod 12 and a pushing member 13. The sleeve body 11 is used to be inserted into the installation cavity 21 of the valve body 2. The lower end of the driving rod 12 is arranged inside the sleeve body 11, and its lower end is fixedly connected with the pushing member 13.

[0035] The lower side wall of the sleeve body 11 is slidably provided with telescopic rods 18. There are at least two telescopic rods 18, and they are respectively located on the side portions of the pushing member 13. The pushing member 13 can rotate accordingly and push the telescopic rods 18 to extend when the driving rod 12 rotates relative to the sleeve body 11, so as to lift the valve seat 3.

[0036] A positioning disk 14 is provided on the upper outer wall of the sleeve body 11. The positioning disk 14 is threadedly connected to the sleeve body 11. The diameter of the positioning disk 14 is larger than the diameter of the installation cavity 21 of the valve body 2. The design of the positioning disk 14 screwed on the upper outer wall of the sleeve body 11 enables it to be erected at the inlet part of the installation cavity 21 of the valve body 2. By adjusting the position of the positioning disk 14 screwed on the outer wall of the sleeve body 11, the length of the sleeve body 11 extending into the installation cavity 21 of the valve body 2 can be adjusted to meet the usage requirements of different depths of the installation cavity 21 of the valve body 2, and at the same time, the stability of the disassembly tool 1 is improved.

[0037] A stepped hole 111 is provided on the inner wall of the upper end of the sleeve body 11. The stepped surface of the stepped hole 111 fits with the stepped surface of the upper stepped shaft of the driving rod 12, and the upper stepped shaft of the driving rod 12 is in clearance fit with the stepped hole 111, enabling the driving rod 12 to rotate relative to the sleeve body 11. An installation groove 112 is provided on the inner wall of the lower end of the sleeve body 11, and through holes 113 communicating with the installation groove 112 are symmetrically opened on both sides of its outer wall. Each through hole 113 is respectively penetrated by a telescopic rod 18. One end of the telescopic rod 18 is located in the installation groove 112 and is fixedly provided with a limiting section with a diameter larger than the aperture of the through hole 113, and the other end extends into the through hole 113. The diameter of the installation groove 112 is larger than the diameter of the inner hole of the sleeve body 11. The design of the stepped hole 111 on the inner wall of the upper end of the sleeve body 11 and the installation groove 112 at the lower end can limit the height position of the driving rod 12, so that the pushing member 13 is located in the installation groove 112 and between the two telescopic rods 18 to improve the stability of the rotation of the driving rod 12 and the pushing member 13.

[0038] The number of the through holes 113 is two. The disassembly tool 1 further includes an elastic reset member 19 for retracting the two telescopic rods 18. The elastic reset member 19 is a first spring. The two ends of the first spring are respectively connected to the telescopic rods 18 in the two through holes 113. In this embodiment, the two ends of the first spring can be connected to the bottoms of the two telescopic rods 18 through connecting members. In other embodiments, it can also include two second springs 20. Each second spring 20 is located in the installation groove 112, sleeved on one of the two telescopic rods 18, and its two ends are respectively connected to the telescopic rod 18 and the inner wall of the sleeve body 11.

[0039] A rotating handle 15 is fixedly provided on the upper part of the driving rod 12. The rotating handle 15 is horizontally arranged and threadedly connected to the driving rod 12.

[0040] The pushing member 13 is a cam. The outer periphery of the cam has a pushing surface cooperating with the telescopic rod 18. The pushing surface has a first side portion 131 and a second side portion 132. The distance from the first side portion 131 to the rotation center line of the driving rod 12 is less than the distance from the second side portion 132 to the rotation center line of the driving rod 12. The distance from the points on the pushing surface to the rotation axis of the cam gradually increases from the first side portion 131 to the second side portion 132.

[0041] The side wall at the lower end of the sleeve body 11 is provided with two through holes 113 which are axially symmetrical with respect to the sleeve body 11 and are respectively connected to the inner hole of the sleeve body 11. A telescopic rod 18 is respectively passed through each through hole 113. The cam has two pushing surfaces symmetrical with respect to the origin of the cam rotation center on both sides, and the two pushing surfaces are respectively matched with the two telescopic rods 18. The sum of the distance between the two first side portions 131 and the length of the two telescopic rods 18 is smaller than the inner hole diameter of the valve seat 3, and the sum of the distance between the second side portions 132 and the length of the two telescopic rods 18 is larger than the inner hole diameter of the valve seat 3.

[0042] The tool also includes a limiting portion for limiting the rotation angle of the driving rod 12 relative to the sleeve body 11.

[0043] The limiting portion includes a limiting plate 16 and a limiting member 17. The limiting plate 16 is arranged on the upper outer wall of the driving rod 12, and the two are fixedly connected. A circular arc-shaped limiting groove 161 is arranged on the limiting plate 16. The limiting member 17 is fixedly arranged on the top of the sleeve body 11 and slidably cooperates with the limiting groove 161. The limiting member 17 can be a bolt or a limiting pin.

[0044] The design of the upper limit portion of the push member 13 and the driving rod 12 can limit the rotation angle of the push member 13 relative to the driving rod 12 .

[0045] One inner wall of the limiting groove 161 is an opening limiting wall 1611, and the other inner wall is a closing limiting wall 1612.

[0046] When the limiting member 17 is in contact with the opening limiting wall 1611, the two telescopic rods 18 are pushed out of the sleeve body 11 by the second side portion 132 of the cam to hold the valve seat 3;

[0047] When the limiting member 17 is in contact with the closing limiting wall 1612 , the first side portion 131 of the cam faces the telescopic rods 18 , and the two telescopic rods 18 are retracted into the sleeve body 11 under the elastic force of the elastic reset member 19 .

[0048] The design of the disassembly tool 1 can effectively lift the valve seat 3 so that the valve seat 3 is separated from the valve body 2 under the drive of the sleeve 11 of the disassembly tool 1, thereby effectively improving the disassembly speed of the valve seat 3, and solving the problem of serious deformation of the valve seat 3 caused by long-term influence of medium filling, while also increasing the service life of the valve.

[0049] The workflow of this utility model:

[0050] Insert the drive rod 12 fixed with a cam, a limit plate 16 and a rotary handle 15 into the sleeve body 11, install the limiting member 17 on the top of the sleeve body 11, and place the limiting member 17 in the limiting groove 161 of the limit plate 16. At the same time, the bottom step surface of the frustum at the upper part of the drive rod 12 is in contact with the bottom surface of the stepped hole 111 of the sleeve body 11. At this time, the cam is placed in the installation groove 112. Then, correspondingly install the telescopic rod 18 into the through hole 113 at the lower part of the sleeve body 11, and install the first spring between the bottoms of the two telescopic rods 18 from the inner hole at the bottom of the sleeve body 11. At the same time, make the two telescopic rods 18 in contact with the first side parts 131 of the two surfaces of the cam. Install the positioning disc 14 at a suitable position on the top of the sleeve body 11, so that the lower part of the sleeve body 11 is inserted into the installation cavity 21 of the valve body 2. Adjust the position of the positioning disc 14 so that when the bottom of the positioning disc 14 is in contact with the top of the valve body 2, the lower part of the sleeve body 11 passes through the inner hole of the valve seat 3, and at this time both telescopic rods 18 are located below the valve seat 3;

[0051] When disassembling the valve seat 3, insert the lower part of the installed sleeve body 11 into the installation cavity 21 of the valve body 2 until the bottom of the positioning disc 14 is in contact with the top of the valve body 2. Rotate the rotary handle 15 to drive the drive rod 12 to rotate, so as to drive the limit plate 16 and the cam to rotate simultaneously until the limiting member 17 is also in contact with the opening limit wall 1611. At this time, the two telescopic rods 18 are in contact with the first side parts 131 of the cam. Under the rotational force of the rotary handle 15, they are converted to be in contact with the second side parts 132 of the cam. During the rotation of the cam, the outer ends of the two telescopic rods 18 are pushed out of the sleeve body 11 to hold the bottom of the valve seat 3. Then, pull the disassembly tool 1 as a whole out of the installation cavity 21 of the valve body 2, thereby driving the valve seat 3 to be pulled out of the valve body 2 at the same time, so as to improve the disassembly efficiency of the valve seat 3.

[0052] The above-disclosed is only a preferred embodiment of the present invention. Of course, it cannot be used to limit the scope of the rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A rotary disassembly tool for a valve seat, characterized in that The disassembly tool (1) includes a sleeve body (11), a driving rod (12) and a pushing member (13). The sleeve body (11) is used to be inserted into the installation cavity (21) of the valve body (2) and pass through the inner hole of the valve seat (3). The lower end of the driving rod (12) is inserted into the sleeve body (11), and its lower end is connected to the pushing member (13). The lower side wall of the sleeve body (11) is slidably provided with telescopic rods (18). There are at least two telescopic rods (18), and they are respectively located on the side of the pushing member (13). The pushing member (13) can rotate along with the driving rod (12) relative to the sleeve body (11) and push the telescopic rods (18) to extend, so as to lift the valve seat (3).

2. The rotary disassembly tool for a valve seat according to claim 1, characterized in that, A positioning disc (14) is provided on the outer wall of the upper part of the sleeve body (11). The positioning disc (14) is connected to the sleeve body (11) by threads. The diameter of the positioning disc (14) is larger than the diameter of the installation cavity (21) of the valve body (2).

3. The rotary disassembly tool for a valve seat according to claim 1, characterized in that, A stepped hole (111) is provided on the inner wall of the upper end of the sleeve body (11). The stepped surface of the stepped hole (111) fits with the upper stepped surface of the driving rod (12).

4. A rotary disassembly tool for a valve seat according to claim 1, characterized in that, An installation groove (112) is provided on the inner wall of the lower end of the sleeve body (11), and at least two through holes (113) communicating with the installation groove (112) are provided on its side wall. Each of the through holes (113) is respectively provided with a telescopic rod (18). One end of the telescopic rod (18) is located in the installation groove (112) and is fixedly provided with a limiting section whose diameter is larger than the aperture of the through hole (113), and the other end extends into the through hole (113). The diameter of the installation groove (112) is larger than the diameter of the inner hole of the sleeve body (11).

5. The rotary disassembly tool for a valve seat according to claim 4, characterized in that, The number of the through holes (113) is two. The disassembly tool (1) further includes an elastic resetting member (19) for retracting the two telescopic rods (18). The elastic resetting member (19) is a first spring. The two ends of the first spring are respectively connected to the telescopic rods (18) in the two through holes (113).

6. The rotary disassembly tool for a valve seat according to claim 1, characterized in that, A rotating handle (15) is fixedly provided on the upper part of the driving rod (12). The rotating handle (15) is horizontally arranged and is threadedly connected to the driving rod (12).

7. A rotary disassembly tool for a valve seat according to claim 1, characterized in that, The pushing member (13) is a cam. The outer periphery of the cam has a pushing surface that cooperates with the telescopic rod (18). The pushing surface has a first side portion (131) and a second side portion (132). The distance from the first side portion (131) to the rotation center line of the driving rod (12) is less than the distance from the second side portion (132) to the rotation center line of the driving rod (12). The distance from the points on the pushing surface to the rotation axis of the cam gradually increases from the first side portion (131) to the second side portion (132).

8. A rotary disassembly tool for a valve seat according to claim 7, characterized in that, Two through holes (113) which are axially symmetric with respect to the sleeve body (11) and communicate with the inner hole of the sleeve body (11) are formed in the side wall at the lower end of the sleeve body (11). The telescopic rods (18) are respectively inserted into each of the through holes (113). Two pushing surfaces which are symmetric with respect to the rotation center origin of the cam are provided on both sides of the cam, and the two pushing surfaces are respectively matched with the two telescopic rods (18). The distance between the two first side portions (131) and the sum of the lengths of the two telescopic rods (18) are smaller than the inner hole diameter of the valve seat (3). The distance between the second side portions (132) and the sum of the lengths of the two telescopic rods (18) are larger than the inner hole diameter of the valve seat (3).

9. A rotary disassembly tool for a valve seat according to claim 7 or 8, characterized in that, The tool further includes a limiting portion for limiting the rotation angle of the driving rod (12) relative to the sleeve body (11). The limiting portion includes a limiting plate (16) and a limiting member (17). The limiting plate (16) is arranged on the outer wall of the upper portion of the driving rod (12) and is fixedly connected thereto. An arc-shaped limiting groove (161) is formed in the limiting plate (16). The limiting member (17) is fixedly arranged at the top of the sleeve body (11) and is in sliding fit with the limiting groove (161).

10. The rotary disassembly tool for a valve seat according to claim 9, characterized in that, One inner wall of the limiting groove (161) is an opening limiting wall (1611), and the other inner wall is a closing limiting wall (1612). When the limiting member (17) is in contact with the opening limiting wall (1611), the two telescopic rods (18) extend out of the sleeve body (11) under the push of the second side portion (132) of the cam. When the limiting member (17) is in contact with the closing limiting wall (1612), the first side portion (131) of the cam faces the telescopic rod (18).

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