Valve seat installation auxiliary device

Abstract

The utility model belongs to the technical field of valve assembly, and discloses a valve seat installation auxiliary device which comprises a valve seat connecting assembly, a valve body connecting assembly and a tensioning assembly, and the valve seat connecting assembly comprises a first supporting piece and at least three first movable pieces distributed in the circumferential direction of the first supporting piece at intervals. Each first movable part is adjustably connected to the first supporting part in the direction close to or away from the center of the first supporting part and used for being connected with the valve seat in a clamped mode. The valve body connecting assembly comprises a second supporting piece and at least three second movable pieces distributed in the circumferential direction of the second supporting piece at intervals, and each second movable piece is adjustably connected to the second supporting piece in the direction close to or away from the center of the second supporting piece and used for abutting against the inner wall of the valve body. The second movable piece or the second supporting piece can abut against the outer end face of the valve body. The tensioning assembly comprises a tensioning rod and a tensioning nut, one end of the tensioning rod is connected to the center of the first supporting piece, and the other end of the tensioning rod can penetrate through the center of the second supporting piece and is in threaded connection with the tensioning nut.

Description

Technical Field

[0001] The utility model relates to the technical field of valve assembly, in particular to a valve seat installation auxiliary device. Background Art

[0002] An elastic seal, such as an O-ring or lip seal, is typically installed between the valve seat and valve body to improve the seal between the two. During installation, the elastic seal is significantly compressed, resulting in significant friction between the seal and the valve seat. This makes it difficult to overcome the preload force of the elastic seal during installation, preventing the valve seat from being axially installed into the designated position on the valve body.

[0003] Existing valve seat installation auxiliary tooling is usually only suitable for valves of specific sizes, and it is difficult to make the valve seat coincide with the central axis of the valve body. During the process of installing the valve seat, it is easy to cause damage to the elastic seal, affecting the sealing of the valve.

[0004] Therefore, it is urgent to propose a valve seat installation auxiliary device to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a valve seat installation auxiliary device that can be applied to valves of various sizes, so that the valve seat can be installed axially to the specified installation position of the valve body, and the central axis of the valve seat and the valve body can be coincided to ensure the sealing of the valve.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A valve seat installation auxiliary device is used to assist in the installation of a valve seat and a valve body, wherein the valve seat installation auxiliary device comprises:

[0008] A valve seat connection assembly includes a first support member and at least three first movable members, wherein the at least three first movable members are spaced apart along the circumference of the first support member, and each first movable member is adjustably connected to the first support member in a direction approaching or moving away from the center of the first support member, and an inner wall of the valve seat is provided with a groove, and the first movable members are configured to engage with the groove;

[0009] a valve body connection assembly comprising a second support member and at least three second movable members, the at least three second movable members being spaced apart along the circumference of the second support member, and each second movable member being adjustably connected to the second support member in a direction approaching or moving away from the center of the second support member, the second movable member being configured to abut against an inner wall of the valve body, and the second movable member or the second support member being capable of abutting against an outer end surface of the valve body;

[0010] The tensioning assembly includes a tensioning rod and a tensioning nut. The first end of the tensioning rod is connected to the center of the first support member, and the second end of the tensioning rod can pass through the center of the second support member and be threadedly connected to the tensioning nut.

[0011] Furthermore, the first support member is provided with scale lines along the moving direction of each of the first movable members; and / or,

[0012] The second supporting member is provided with scale lines along the moving direction of each second movable member.

[0013] Furthermore, the first support member includes a first body and first support arms corresponding to the first movable members one by one, the first support arms are arranged at intervals along the circumference of the first body, and each first movable member is slidably connected to the corresponding first support arm; and / or,

[0014] The second supporting member includes a second body and second supporting arms corresponding to the second movable members one by one. The second supporting arms are arranged at intervals along the circumference of the second body, and each second movable member is slidably connected to the corresponding second supporting arm.

[0015] Furthermore, a first sliding groove is provided on the first supporting arm and extends in a direction close to or away from the center of the first body, and the first movable member is slidably disposed in the first sliding groove.

[0016] Furthermore, the valve seat connection assembly also includes a first fastener, a limiting groove is provided on the first movable part, the limiting groove extends in a direction close to or away from the center of the first body, the first fastener passes through the limiting groove, and one end of the first fastener is connected to the bottom of the first slide groove, and the other end is used to press and fix the first movable part in the first slide groove.

[0017] Furthermore, an elastic washer is provided between the first fastener and the first movable member.

[0018] Furthermore, the second movable member includes a sliding portion and an abutment column connected to each other, the sliding portion is slidably mounted on the corresponding second support arm, the abutment column is cylindrical, and the side surface of the abutment column can be inscribed with the inner wall of the valve body.

[0019] Furthermore, the valve body connection assembly further includes a second fastener, which is threadedly connected to the sliding portion, and the second fastener can pass through the side wall of the sliding portion and abut against the second support arm.

[0020] Furthermore, a slider is provided on one of the sliding portion and the second support arm, and a second sliding groove is provided on the other. The slider is slidably connected to the second sliding groove, and the second sliding groove extends in a direction close to or away from the center of the second body.

[0021] Furthermore, the valve seat connection assembly also includes a locking nut threadedly connected to the first end of the tightening rod, the first end of the tightening rod passes through the center of the first support member, and at least one locking nut is provided on both sides of the first support member to lock the first support member to the tightening rod.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a valve seat installation auxiliary device for assisting the installation of a valve seat and a valve body, wherein the valve seat installation auxiliary device includes a valve seat connection assembly, a valve body connection assembly and a tightening assembly, the valve seat connection assembly includes a first support member and at least three first movable members, the at least three first movable members are distributed at intervals along the circumference of the first support member, and each first movable member is adjustably connected to the first support member in a direction close to or away from the center of the first support member, the inner wall of the valve seat is provided with a groove, and the first movable member is used to engage with the groove; the valve body connection assembly includes a second support member and at least three second movable members, the at least three second movable members are distributed at intervals along the circumference of the second support member, and each second movable member is adjustably connected to the second support member in a direction close to or away from the center of the second support member, the second movable member is used to abut against the inner wall of the valve body, and the second movable member or the second support member can abut against the outer end surface of the valve body; the tightening assembly includes a tightening rod and a tightening nut, the first end of the tightening rod is connected to the center of the first support member, and the second end of the tightening rod can pass through the center of the second support member and be threadedly connected to the tightening nut. By adjusting the position of each first movable part, the first movable part is engaged with the grooves of valve seats with different inner diameters, and the position of each first movable part from the center of the first support part is the same, so that the central axis of the first support part and the central axis of the valve seat are coincident; by adjusting the position of each second movable part, the second movable part is abutted against the inner wall of the valve body with different inner diameters, and the position of each second movable part from the center of the second support part is the same, so that the central axis of the second support part and the central axis of the valve body are coincident; by connecting the center of the first support part and the center of the second support part by a tightening rod, the central axis of the valve seat and the valve body are coincident, thereby preventing the sealing surface of the valve seat from being damaged during the installation process and ensuring the sealing of the valve; by screwing the tightening nut, the valve seat can overcome the pre-tightening force of the elastic seal and be installed to the specified position of the valve body, thereby further ensuring the sealing of the valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1This is a cross-sectional view of the valve seat installation auxiliary device and the valve of the utility model;

[0025] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0026] Figure 3 It is a structural diagram of the valve seat installation auxiliary device of the utility model;

[0027] Figure 4 It is a side view of the valve seat installation auxiliary device of the utility model;

[0028] Figure 5 It is a front view of the second support member of the present invention;

[0029] Figure 6 It is a schematic diagram of the connection between the valve seat installation auxiliary device and the valve seat of the utility model.

[0030] In the picture:

[0031] 100, valve seat; 110, groove; 200, valve body; 300, elastic sealing element;

[0032] 1. Valve seat connection assembly; 11. First support member; 111. First body; 112. First support arm; 113. First slide; 12. First movable member; 121. Limiting groove; 13. First fastener;

[0033] 2. Valve body connection assembly; 21. Second support member; 211. Second body; 212. Second support arm; 22. Second movable member; 221. Sliding portion; 222. Abutment column; 23. Second fastener; 24. Second slide groove;

[0034] 3. Tensioning assembly; 31. Tensioning rod; 32. Tensioning nut;

[0035] 4. Elastic washer; 5. Lock nut. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0037] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0039] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0040] like Figures 1 to 6 As shown, since an elastic seal 300 is provided between the valve seat 100 and the valve body 200, the elastic seal 300 hinders the installation of the valve seat 100 along the axial direction of the valve body 200. Moreover, the central axis of the valve seat 100 is easily offset during the installation process, resulting in the central axis of the valve seat 100 and the valve body 200 not coinciding. If the valve seat 100 and the valve body 200 are not installed in place or are not aligned, the sealing performance of the valve will be affected. To solve the above problems, this embodiment provides a valve seat installation auxiliary device for assisting the installation of the valve seat 100 and the valve body 200. It can be applied to valves of various sizes, so that the valve seat 100 can be installed along the axis to the specified position of the valve body 200, and the central axis of the valve seat 100 and the valve body 200 can be coincident, thereby ensuring the sealing performance of the valve.

[0041] The dimensions of the valve include the inner diameter of the valve seat 100 , the inner diameter of the valve body 200 , and the distance between the designated installation position of the valve seat 100 and the outer end surface of the valve body 200 .

[0042] Specifically, the valve seat installation auxiliary device includes a valve seat connection assembly 1, a valve body connection assembly 2 and a tensioning assembly 3. The valve seat connection assembly 1 includes a first support member 11 and at least three first movable members 12. The at least three first movable members 12 are distributed at intervals along the circumference of the first support member 11, and each first movable member 12 is adjustably connected to the first support member 11 in a direction close to or away from the center of the first support member 11. The inner wall of the valve seat 100 is provided with a groove 110, and the first movable member 12 is used to engage with the groove 110; the valve body connection assembly 2 includes a second support member 21 and at least three second movable members 22. At least three second movable parts 22 are distributed at intervals along the circumference of the second support part 21, and each second movable part 22 is adjustably connected to the second support part 21 in a position close to or away from the center direction of the second support part 21. The second movable part 22 is used to abut against the inner wall of the valve body 200, and the second movable part 22 or the second support part 21 can abut against the outer end surface of the valve body 200; the tightening assembly 3 includes a tightening rod 31 and a tightening nut 32, the first end of the tightening rod 31 is connected to the center of the first support part 11, and the second end of the tightening rod 31 can pass through the center of the second support part 21 and be threadedly connected to the tightening nut 32.

[0043] Since three points can define a circle, by providing at least three first movable members 12 that are distributed along the circumference of the first support member 11 and are adjustably connected to the first support member 11 in a direction close to or away from the center of the first support member 11, the valve seat connection assembly 1 can adjust the position of each first movable member 12 so that the first movable member 12 is engaged with the groove 110 of the valve seat 100 with different inner diameters, and by adjusting so that the position of each first movable member 12 from the center of the first support member 11 is the same, it can be ensured that the central axis of the first support member 11 coincides with the central axis of the valve seat 100; by providing at least three second movable members 12 that are distributed along the circumference of the second support member 21 and are adjustably connected to the second support member 21 in a direction close to or away from the center of the second support member 21 Part 22, the valve connecting assembly can adjust the position of each second movable part 22 so that the second movable part 22 abuts against the inner wall of the valve body 200 with different inner diameters, and by adjusting the position of each second movable part 22 to be the same from the center of the second support part 21, it can ensure that the central axis of the second support part 21 coincides with the central axis of the valve body 200; after fixing the valve seat connecting assembly 1 to the valve seat 100 and connecting the first end of the tightening rod 31 to the center of the first support part 11, the connection of the valve seat connecting assembly 1, the tightening rod 31 and the valve seat 100 is placed in the valve body 200, and the second end of the tightening rod 31 passes through the center of the second support part 21 and is threadedly connected to the tightening nut 32, so that the central axis of the valve seat 100 coincides with that of the valve body 200, thereby ensuring the sealing of the valve. The second movable member 22 or the second support member 21 can abut against the outer end surface of the valve body 200, providing axial positioning for the valve body connection assembly 2. By tightening the tightening nut 32, the valve seat 100 can be moved along the axial direction of the valve body 200 toward the outer end surface of the valve body 200, thereby enabling the valve seat 100 to overcome the preload force of the elastic seal 300 and be installed in the designated position of the valve body 200, further ensuring the sealing of the valve. In addition, by adjusting the position of the tightening nut 32 on the tightening rod 31, the valve seat installation auxiliary device can be applied to a variety of valves with different distances between the designated installation position of the valve seat 100 and the outer end surface of the valve body 200.

[0044] Furthermore, the first support member 11 is provided with scale lines (not shown in the figure) along the moving direction of each first movable member 12, which provides a clear and intuitive reference value for the staff to adjust the distance between the first movable member 12 and the center of the first support member 11, thereby facilitating the improvement of the accuracy of the position adjustment of the first movable member 12 on the first support member 11, thereby better ensuring that the central axis of the first support member 11 coincides with the central axis of the valve seat 100.

[0045] Likewise, if Figure 3 and Figure 5As shown, the second support member 21 is provided with scale lines along the moving direction of each second movable member 22, which provides a clear and intuitive reference value for the staff to adjust the distance between the second movable member 22 and the center of the second support member 21, thereby facilitating the improvement of the accuracy of the position adjustment of the second movable member 22 on the second support member 21, thereby better ensuring that the center axis of the second support member 21 coincides with the center axis of the valve body 200.

[0046] like Figure 3 As shown, the first support member 11 includes a first body 111 and a first support arm 112 corresponding to the first movable member 12. The first support arms 112 are arranged at intervals along the circumference of the first body 111. Each first movable member 12 is slidably connected to the corresponding first support arm 112, that is, the number of first support arms 112 is at least three. By arranging at least three first support arms 112 at intervals along the circumference of the first body 111, the material of the first support member 11 can be saved, the volume and weight of the first support member 11 can be reduced, the production cost can be reduced, and the structural stability and high structural strength of the first support member 11 can be ensured. Optionally, the connection method between the first movable member 12 and the first support arm 112 can also be a rolling connection, etc., which is not limited here. Furthermore, the first support arms 112 are evenly spaced along the circumference of the first body 111, which can further make the structure of the first support member 11 stable and the force balanced.

[0047] Furthermore, the first support arm 112 is provided with a first slide groove 113 extending in a direction close to or away from the center of the first body 111, and the first movable member 12 is slidably set in the first slide groove 113. The sliding connection between the first slide groove 113 and the first movable member 12 provides a guiding effect for the first movable member 12 to move in a direction close to or away from the center of the first body 111, which helps to make the central axis of the first support member 11 coincide with the central axis of the valve seat 100, and is beneficial to reducing the volume of the valve seat connection assembly 1.

[0048] In addition, the valve seat connection assembly 1 also includes a first fastener 13. The first movable member 12 is provided with a limiting groove 121, which extends in a direction close to or away from the center of the second body 211. The first fastener 13 passes through the limiting groove 121, and one end of the first fastener 13 is connected to the bottom of the first slide groove 113, and the other end is used to press and fix the first movable member 12 in the first slide groove 113. When adjusting the position of the first movable member 12, the first fastener 13 is first loosened, then the first movable member 12 is slid in a direction close to or away from the center of the first body 111, and finally the first fastener 13 is tightened to fix the first movable member 12 to the first support member 11. Optionally, the first fastener 13 includes but is not limited to a bolt, a screw, or a butterfly screw, etc., which are not limited here.

[0049] In some embodiments, the second support member 21 includes a second body 211 and a second support arm 212 corresponding to the second movable member 22. The second support arms 212 are arranged at intervals along the circumference of the second body 211. Each second movable member 22 is slidably connected to the corresponding second support arm 212, which can reduce the volume and weight of the second support member 21, reduce production costs, and ensure that the structure of the second support member 21 is stable and has high structural strength. Details are not provided here. Optionally, the connection between the second movable member 22 and the second support arm 212 can also be a rolling connection, etc., which is not limited here. Furthermore, the second support arms 212 are evenly spaced along the circumference of the second body 211, which can further stabilize the structure of the second support member 21 and balance the force.

[0050] Furthermore, if Figure 3 and Figure 4 As shown, the second movable member 22 includes a connected sliding portion 221 and an abutting column 222. The sliding portion 221 is slidably mounted on the corresponding second support arm 212. The abutting column 222 is cylindrical, and the side surface of the abutting column 222 can be inscribed with the inner wall of the valve body 200. That is, the abutting column 222 is in line contact with the inner wall of the valve body 200. This ensures that the contact point between each second movable member 22 and the inner wall of the valve body 200 is fixed, thereby ensuring uniform force on the second movable member 22 and preventing deviation between the central axis of the second support member 21 and the central axis of the valve body 200. By slidably mounting the sliding portion 221 on the corresponding second support arm 212, the connection between the second movable member 22 and the second support arm 212 is facilitated, preventing the second support member 21 from obstructing the movement of the abutting column 222, and allowing the sliding portion 221 or the second support arm 212 to abut against the outer end surface of the valve body 200.

[0051] In addition, the valve body connection assembly 2 further includes a second fastener 23, which is threadedly connected to the sliding portion 221 and can pass through the side wall of the sliding portion 221 to abut against the second support arm 212. When adjusting the position of the first movable member 12, the second fastener 23 is first loosened, and then the second movable member 22 is slid toward or away from the center of the second body 211. Finally, the second fastener 23 is tightened to secure the second movable member 22 to the second support member 21. Optionally, the second fastener 23 includes, but is not limited to, a bolt, a screw, or a butterfly screw, etc., which are not limited herein.

[0052] Furthermore, a slider is provided on one of the sliding portion 221 and the second support arm 212, and a second slide groove 24 is provided on the other. The slider is slidably connected to the second slide groove 24, and the second slide groove 24 extends along the direction close to or away from the center of the second body 211, further providing a guiding effect for the second movable part 22 to move along the direction close to or away from the center of the second body 211, which helps to make the central axis of the second support part 21 coincide with the central axis of the valve body 200.

[0053] like Figure 2 As shown, an elastic gasket 4 is provided between the first fastener 13 and the first movable member 12, which can better fix the first movable member 12, prevent the first movable member 12 from loosening, and avoid the axis deviation of the valve seat 100, thereby ensuring the sealing effect of the valve.

[0054] like Figure 4 As shown, the valve seat connection assembly 1 also includes a locking nut 5 threadedly connected to the first end of the tightening rod 31. The first end of the tightening rod 31 passes through the center of the first support member 11, and at least one locking nut 5 is provided on both sides of the first support member 11 to lock the first support member 11 to the tightening rod 31. On the one hand, it can ensure the stability of the connection between the valve connector and the tightening rod 31. On the other hand, combined with the tightening nut 32, during the process of assembling the valve body 200 and the valve cover, the length position of the two ends of the tightening rod 31 can be adjusted according to the space size at both ends of the tightening rod 31 to ensure that the valve seat 100 is firmly fixed on the valve body 200 and the valve cover, thereby preventing the valve seat 100 from falling off during installation and damaging the sealing surface of the valve seat 100, thereby ensuring the sealing of the valve.

[0055] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A valve seat installation auxiliary device for assisting the installation of a valve seat (100) and a valve body (200), characterized in that: The valve seat installation auxiliary device includes: A valve seat connection assembly (1) comprises a first support member (11) and at least three first movable members (12), wherein the at least three first movable members (12) are spaced apart along the circumference of the first support member (11), and each first movable member (12) is adjustably connected to the first support member (11) in a direction close to or away from the center of the first support member (11), an inner wall of the valve seat (100) is provided with a groove (110), and the first movable member (12) is used for engaging with the groove (110); A valve body connection assembly (2), comprising a second support member (21) and at least three second movable members (22), wherein the at least three second movable members (22) are spaced apart along the circumference of the second support member (21), and each second movable member (22) is adjustably connected to the second support member (21) in a direction close to or away from the center of the second support member (21), the second movable member (22) is used to abut against the inner wall of the valve body (200), and the second movable member (22) or the second support member (21) can abut against the outer end surface of the valve body (200); A tensioning assembly (3) comprises a tensioning rod (31) and a tensioning nut (32), wherein the first end of the tensioning rod (31) is connected to the center of the first support member (11), and the second end of the tensioning rod (31) can pass through the center of the second support member (21) and be threadedly connected to the tensioning nut (32).

2. The valve seat installation auxiliary device according to claim 1, characterized in that: The first support member (11) is provided with scale lines along the moving direction of each of the first movable members (12); and / or, The second supporting member (21) is provided with scale lines along the moving direction of each second movable member (22).

3. The valve seat installation auxiliary device according to claim 1, characterized in that: The first supporting member (11) comprises a first body (111) and first supporting arms (112) corresponding one to one with the first movable members (12), the first supporting arms (112) being arranged at intervals along the circumference of the first body (111), and each first movable member (12) being slidably connected to the corresponding first supporting arm (112); and / or, The second supporting member (21) comprises a second body (211) and second supporting arms (212) corresponding one to one with the second movable members (22). The second supporting arms (212) are arranged at intervals along the circumference of the second body (211), and each second movable member (22) is slidably connected to the corresponding second supporting arm (212).

4. The valve seat installation auxiliary device according to claim 3, characterized in that: The first support arm (112) is provided with a first sliding groove (113) extending in a direction close to or away from the center of the first body (111), and the first movable member (12) is slidably arranged in the first sliding groove (113).

5. The valve seat installation auxiliary device according to claim 4, characterized in that: The valve seat connection assembly (1) further includes a first fastener (13), a limiting groove (121) is provided on the first movable member (12), the limiting groove (121) extends in a direction close to or away from the center of the first body (111), the first fastener (13) passes through the limiting groove (121), and one end of the first fastener (13) is connected to the bottom of the first slide groove (113), and the other end is used to press and fix the first movable member (12) in the first slide groove (113).

6. The valve seat installation auxiliary device according to claim 5, characterized in that: An elastic washer (4) is provided between the first fastener (13) and the first movable member (12).

7. The valve seat installation auxiliary device according to claim 3, characterized in that: The second movable member (22) includes a sliding portion (221) and an abutting column (222) connected to each other, the sliding portion (221) is slidably mounted on the corresponding second support arm (212), the abutting column (222) is cylindrical, and the side surface of the abutting column (222) can be inscribed with the inner wall of the valve body (200).

8. The valve seat installation auxiliary device according to claim 7, characterized in that: The valve body connection assembly (2) further includes a second fastener (23), the second fastener (23) being threadedly connected to the sliding portion (221), and the second fastener (23) being capable of passing through the side wall of the sliding portion (221) and being pressed against the second support arm (212).

9. The valve seat installation auxiliary device according to claim 7, characterized in that: A slider is provided on one of the sliding portion (221) and the second supporting arm (212), and a second sliding groove (24) is provided on the other. The slider is slidably connected to the second sliding groove (24), and the second sliding groove (24) extends in a direction close to or away from the center of the second body (211).

10. The valve seat installation auxiliary device according to any one of claims 1 to 9, characterized in that: The valve seat connection assembly (1) also includes a locking nut (5) threadedly connected to the first end of the tightening rod (31), the first end of the tightening rod (31) passes through the center of the first support member (11), and at least one locking nut (5) is provided on both sides of the first support member (11) to lock the first support member (11) to the tightening rod (31).

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