Conical valve seat removal tool

Abstract

The utility model provides a conical valve seat disassembly tool, comprising a fixing sleeve, a center rod and an elastic tensioning sleeve, a fixing plate is arranged on the upper end of the fixing sleeve, the center rod is arranged in the fixing sleeve, a limiting boss is arranged at the bottom end of the center rod, a conical transition portion is formed at the connection between the top of the limiting boss and the center rod, a limiting ring is arranged at the bottom end of the limiting boss, the upper end of the center rod is threadedly connected to the fixing sleeve, and an elastic tensioning sleeve is sleeved on the lower end of the center rod, and the upper and lower ends of the elastic tensioning sleeve respectively abut against the bottom end of the fixing sleeve and the top end of the limiting boss; the elastic tensioning sleeve comprises a plurality of elastic rings along the tensioning sheet and sleeved on the outer side of the tensioning sheet, each tensioning sheet is provided with a supporting protrusion on the outer wall of each tensioning sheet, the bottom end of the inner wall of each tensioning sheet is inclined in a conical surface and is adapted to the conical transition portion of the limiting boss, the elastic tensioning sleeve is stretched open by the tapered limiting boss so that the supporting protrusion can extend to the bottom of the valve seat, and finally the valve seat is lifted by rotating the bolts on both sides to realize disassembly, and the operation is simple and convenient.

Description

Technical Field

[0001] The utility model belongs to the technical field of grouting pipelines, and in particular relates to a conical valve seat disassembly tool used in a slurry suction and discharge valve body. Background Art

[0002] The suction and discharge valve group is the core component of the grouting pump. The design of its structure and performance is directly related to the smooth suction and discharge of the slurry. At present, when the suction and discharge valve group is working, the piston reciprocates and cooperates with the valve seat to achieve sealing. Since the bottom of the valve seat adopts a conical structure, the valve seat will be more tightly connected to the valve body under the impact of the piston for a long time, which will affect the disassembly and replacement of the valve seat. The traditional way to disassemble the valve seat requires disassembling the valve body and then removing the valve seat. The overall operation process is relatively complicated.

[0003] Chinese patent document: CN201922488100.4, discloses a special tool for disassembling the valve seat. This application pre-installs a tapered pull rod into the expansion sleeve, pre-fixes it with a tensioning nut, passes the pre-fixed pull rod and expansion sleeve assembly through the bottom of the valve seat to be removed, and then places the pull rod and expansion sleeve assembly on the valve body through a support washer and a hanging nut. After the installation is completed, tighten the tensioning nut so that the pull rod with a tapered head will open the expansion sleeve so that the head of the expansion sleeve can hook the bottom of the valve seat, and then tighten the hanging nut with external force. The special tool for disassembling the valve seat can easily remove the valve seat from the valve body. In this application, the expansion sleeve will deform after long-term use, causing it to remain in an expanded state, and may not be able to penetrate the valve seat for disassembly, so its service life is short. Utility Model Content

[0004] In view of the above problems, the utility model discloses a conical valve seat disassembly tool, which is simple and convenient to operate and has a long service life, thus solving the problem that the valve seat is relatively difficult to disassemble in the prior art.

[0005] The specific technical solutions are as follows:

[0006] A conical valve seat disassembly tool comprises a fixing sleeve, a center rod and an elastic tension sleeve, wherein a fixing plate is horizontally arranged at the upper end of the fixing sleeve, a threaded support is threadedly connected to the fixing plate, the fixing sleeve is arranged inside the fixing sleeve, a limiting boss is arranged at the bottom end of the center rod, a connection between the top end of the limiting boss and the center rod is in a conical structure and forms a conical transition portion, a limiting ring is arranged at the bottom end of the limiting boss, the upper end of the center rod is threadedly connected to the fixing sleeve, the lower end of the center rod is sleeved with the elastic tension sleeve, and the upper and lower ends of the elastic tension sleeve respectively abut against the bottom end of the fixing sleeve and the top end of the limiting boss;

[0007] The elastic tensioning sleeve includes a plurality of tensioning plates evenly distributed along the circumference of the center rod and an elastic ring sleeved on the outside of the plurality of tensioning plates. A supporting protrusion is provided on the outer wall of each tensioning plate, and the bottom end of the inner wall of each tensioning plate is inclined in a conical shape and matched with the conical transition portion on the limiting boss.

[0008] The center rod rotates and drives the limit boss to rise, so that the bottom end of the inner wall of the elastic tensioning sleeve cooperates with the conical transition part to expand and move to the outside of the limit boss, and the supporting protrusion abuts against the limit ring. Then, the fixing sleeve is lifted upward under the action of the support member, so that the valve seat can be lifted upward through the supporting protrusion on the tensioning sheet to realize the removal of the valve seat.

[0009] Furthermore, the cross-section of the tensioning piece is an arc-shaped structure, the inner wall of the tensioning piece is arranged to fit the side wall of the center rod, and the outer wall of the tensioning piece is transversely provided with a receiving groove for receiving the elastic ring.

[0010] Furthermore, the fixing plates are distributed on both sides of the top of the fixing sleeve, and screw holes are longitudinally opened on the fixing plates. The screw holes are threadedly connected to the threaded support members. The bottom end of the threaded support member presses against the pipeline and supports the fixing sleeve upward under the action of the threads.

[0011] Furthermore, the threaded support member is a bolt.

[0012] Furthermore, a handle is horizontally provided at the top end of the center rod.

[0013] Furthermore, the length of the elastic tension sleeve is adapted to the length of the limiting boss.

[0014] Furthermore, the bottom end of the fixing sleeve protrudes outward and is provided with a pressing ring for pressing the top of the elastic tensioning sleeve.

[0015] Furthermore, the diameter of the pressing ring, the diameter of the limiting ring and the diameter of the elastic expansion sleeve after shrinkage are all smaller than the inner diameter of the valve seat.

[0016] The beneficial effects of the utility model are embodied in:

[0017] (1) The utility model utilizes the expansion sleeve principle to pass the center rod with the elastic expansion sleeve through the bottom of the valve seat, and then expands the elastic expansion sleeve through the tapered limit boss so that the supporting protrusion can extend to the bottom of the valve seat. Finally, the valve seat is lifted by rotating the bolts on both sides to achieve disassembly, which is simple and convenient to operate.

[0018] (2) The elastic tension sleeve of the utility model adopts a plurality of tensioning plates and an O-ring to tighten and position, which has a simple structure and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the disassembly tool of the utility model.

[0020] Figure 2 It is a structural schematic diagram of the disassembly tool placed in the slurry suction and discharge valve in the utility model.

[0021] Figure 3 for Figure 2 Front cross-sectional view of .

[0022] Figure 4 It is a schematic diagram of the structure of the elastic tension sleeve after being expanded in the utility model.

[0023] Fixed sleeve 1, pressing ring 11, fixed plate 2, screw hole 21, threaded support 22, center rod 3, handle 31, limiting boss 4, conical transition part 41, limiting ring 42, elastic tensioning sleeve 5, tensioning sheet 51, accommodating groove 511, supporting protrusion 512, elastic ring 52, valve seat 6. DETAILED DESCRIPTION

[0024] In order to make the technical solution of the utility model clearer, the utility model is further described below in conjunction with the accompanying drawings. Any equivalent replacement of the technical features of the technical solution of the utility model and any solution derived from conventional reasoning shall fall within the protection scope of the utility model. The fixed connection and fixed setting mentioned in the utility model are all common connection methods in the mechanical field, including welding, bolt and nut connection, and screw connection.

[0025] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0026] like Figure 1-4As shown, this embodiment provides a conical valve seat disassembly tool, including a fixing sleeve 1, a center rod 3 and an elastic tensioning sleeve 5. Fixing plates 2 are horizontally arranged on both sides of the upper end of the fixing sleeve 1. Screw holes 21 are longitudinally opened at both ends of the fixing plate 2. The screw holes 21 are threadedly connected to threaded support members 22. The threaded support member 22 is a bolt. The bottom end of the bolt is pressed against the pipeline and supports the fixing sleeve 1 upward under the action of the thread. The bottom end of the fixing sleeve 1 protrudes outward and is provided with a pressing ring 11 for pressing the top of the elastic tensioning sleeve 5. The fixing sleeve 1 is internally threadedly connected to the center rod 3. A handle 31 for driving the center rod 3 to rotate is horizontally provided at the top of the center rod 3. A limiting boss 4 is provided at the bottom end of the center rod 3. The connection between the top of the limiting boss 4 and the center rod 3 is a conical structure and forms a conical transition portion 41. A limiting ring 42 for supporting and limiting the elastic tensioning sleeve 5 is provided at the bottom end of the limiting boss 4. The upper end of the center rod 3 is a threaded section and is threadedly connected to the fixing sleeve 1. The lower end of the center rod 3 is a sliding rod section and is sleeved with the elastic tensioning sleeve 5. The upper and lower ends of the elastic tensioning sleeve 5 respectively abut against the bottom end of the pressing ring 11 and the top of the limiting boss 4.

[0027] The elastic tensioning sleeve 5 includes three tensioning sheets 51 evenly distributed along the circumference of the center rod 3 and an elastic ring 52 sleeved on the outside of the three tensioning sheets 51, and the elastic ring 52 is an elastic O-ring; the cross-section of the tensioning sheets 51 is an arc-shaped structure, the inner wall of the tensioning sheet 51 is fitted with the side wall of the center rod 3, and the outer wall of the tensioning sheet 51 is transversely provided with a receiving groove 511 for accommodating the elastic ring 52. There are two receiving grooves 511 and they are distributed up and down. The outer wall of each tensioning sheet 51 is provided with a supporting protrusion 512 for lifting the bottom of the valve seat 6, and the bottom end of the inner wall of each tensioning sheet 51 is inclined in a conical surface and adapted to the conical transition portion 41 on the limiting boss 4.

[0028] By rotating the center rod 3 and driving the limiting boss 4 to rise, the bottom end of the inner wall of the elastic tensioning sleeve 5 cooperates with the conical transition portion 41 to open and move to the outside of the limiting boss 4, and the supporting protrusion 512 is abutted against the limiting ring 42. Subsequently, the fixing sleeve 1 is lifted upward under the action of the support member, so that the valve seat 6 can be lifted upward by the supporting protrusion 512 on the tensioning sheet 51, thereby realizing the removal of the valve seat 6.

[0029] In this embodiment, the length of the elastic tension sleeve 5 is adapted to the length of the limiting boss 4 to ensure that when the elastic tension sleeve 5 is sleeved on the surface of the limiting boss 4, the tension sheet 51 can be completely fitted with the surface of the limiting boss 4 to ensure stability.

[0030] In this embodiment, the diameters of the pressing ring 11 , the limiting ring 42 and the shrunk elastic tension sleeve 5 are all smaller than the inner diameter of the valve seat 6 , so that the disassembly tool can smoothly pass through the valve seat 6 .

[0031] When the utility model disassembles the valve seat 6, the bolts on the upper flange in the suction and discharge slurry are first removed in sequence, and then the upper cover plate is taken out, and then the valve body components and springs in the suction and discharge slurry are taken out; then the disassembly tool is deeply inserted under the valve seat 6, and it is noted that the handle 31 is close to the fixed plate 2 and the handle 31 is relatively loose when turned; then the handle 31 is turned, and the handle 31 is lifted upward together with the center rod 3 and rotated to the limit position, at which time the elastic tension sleeve 5 expands, and the bottom supporting protrusion 512 of the tension sheet 51 is about to reach the lower end of the valve seat 6; then the two bolts just disassembled are screwed into the screw holes 21 of the fixed plate 2 of the disassembly tool and close to the upper flange of the suction and discharge slurry, and finally the bolts are tightened, the fixed plate 2 is lifted, the center rod 3 and the elastic tension sleeve 5 are also lifted, and the valve seat 6 is taken out.

[0032] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a technician familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A conical valve seat removal tool, characterized in that: It comprises a fixing sleeve (1), a center rod (3) and an elastic tension sleeve (5), wherein the upper end of the fixing sleeve (1) is provided with a fixing plate (2), the fixing plate (2) is threadedly connected with a threaded support member (22), the fixing sleeve (1) is arranged in the fixing sleeve (1), the bottom end of the center rod (3) is provided with a limiting boss (4), the connection between the top end of the limiting boss (4) and the center rod (3) is a conical structure and forms a conical transition part (41), the bottom end of the limiting boss (4) is provided with a limiting ring (42), the upper end of the center rod (3) is threadedly connected with the fixing sleeve (1), the lower end of the center rod (3) is sleeved with the elastic tension sleeve (5), the upper and lower ends of the elastic tension sleeve (5) respectively abut against the bottom end of the fixing sleeve (1) and the top end of the limiting boss (4); The elastic tension sleeve (5) comprises a plurality of tension sheets (51) uniformly distributed along the circumference of the central rod (3) and an elastic ring (52) sleeved on the outside of the plurality of tension sheets (51), each tension sheet (51) having an outer wall provided with a supporting protrusion (512), and the bottom end of the inner wall of each tension sheet (51) is arranged in a conical shape and is adapted to the conical transition portion (41) on the limiting boss (4).

2. A conical valve seat removal tool according to claim 1, characterized in that: The cross-section of the tensioning piece (51) is an arc-shaped structure, the inner wall of the tensioning piece (51) is arranged to fit the side wall of the center rod (3), and the outer wall of the tensioning piece (51) is transversely provided with a receiving groove (511) for receiving the elastic ring (52).

3. A conical valve seat removal tool as claimed in claim 1, characterized in that: The fixing plates (2) are distributed on both sides of the top of the fixing sleeve (1), and screw holes (21) are longitudinally opened on the fixing plates (2). The screw holes (21) are threadedly connected to the threaded support members (22). The bottom end of the threaded support member (22) presses against the pipeline and supports the fixing sleeve (1) upward under the action of the threads.

4. A conical valve seat removal tool as claimed in claim 3, characterized in that: The threaded support member (22) is a bolt.

5. A conical valve seat removal tool as claimed in claim 1, characterized in that: A handle (31) is horizontally provided at the top end of the central rod (3).

6. A conical valve seat removal tool as claimed in claim 2, characterized in that: The elastic ring (52) is an O-ring.

7. A conical valve seat removal tool as claimed in claim 1, characterized in that: The length of the elastic tension sleeve (5) is adapted to the length of the limiting boss (4).

8. A conical valve seat removal tool as claimed in claim 1, characterized in that: The bottom end of the fixing sleeve (1) protrudes outward and is provided with a pressing ring (11) for pressing the top of the elastic tensioning sleeve (5).

9. A conical valve seat removal tool as claimed in claim 8, characterized in that: The diameter of the pressure ring (11), the diameter of the limiting ring (42) and the diameter of the elastic tension sleeve (5) after contraction are all smaller than the inner diameter of the valve seat (6).

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