Removal device for throttling cone of pressure reducing valve

Abstract

The embodiment of the utility model provides a dismounting device for a throttling cone of a pressure reducing valve. The dismounting device comprises a fixed shell and a lifting assembly. The fixed shell is used for being in butt joint with a valve seat of a pressure reducing valve. The lifting assembly comprises a lifting part and a driving part, the lifting part is arranged on the fixed shell in a penetrating mode, the end, facing the throttling cone, of the lifting part is used for being connected with the mounting shaft, and the driving part is arranged on the lifting part in a sleeving mode and located on the side, back on to the throttling cone, of the fixed shell. When the throttling cone of the pressure reducing valve is dismounted, the fixed shell is fixed on the shell of the pressure reducing valve, the lifting piece of the lifting assembly is connected with the throttling cone, and then the driving piece is used for driving the lifting piece to move upwards, so that the mounting shaft is separated from the throttling cone, the operation is simple, and the separation efficiency of the mounting shaft and the throttling cone is high.

Description

Technical Field

[0001] The present application relates to the technical field of special tools for pressure reducing valves, and in particular to a device for removing a throttling cone of a pressure reducing valve. Background Art

[0002] Combination pressure reducing valves are designed for water supply systems operating under complex operating conditions and are widely used in hydropower stations. They adjust pressure and flow by varying the opening of the throttling cone, achieving pressure reduction through the throttling effect. When inlet pressure or flow changes, the valve automatically adjusts itself using the energy of the medium itself, maintaining the outlet pressure at the preset low value.

[0003] In the related art, after the valve seat assembly is removed, the throttle cone and the mounting shaft need to be disassembled to check and treat the cavitation situation and replace the seal.

[0004] However, the throttle cone and the mounting shaft are interference fit, and it is difficult to separate the two. Utility Model Content

[0005] An embodiment of the present application provides a device for removing a throttling cone of a pressure reducing valve, which is used to disassemble the throttling cone and the mounting shaft of the valve seat.

[0006] The embodiment of the present application provides a device for removing a throttle cone of a pressure reducing valve, comprising:

[0007] Fixed housing, used for docking with the valve seat of the pressure reducing valve;

[0008] The lifting assembly includes a lifting member and a driving member. The lifting member is passed through the fixed shell. The end of the lifting member facing the throttle cone is used to connect with the mounting shaft. The driving member is sleeved on the lifting member, and the driving member is located on the side of the fixed shell facing away from the throttle cone. The driving member is used to move the lifting member in a direction away from the throttle cone to disengage the mounting shaft from the throttle cone.

[0009] In a feasible implementation, the fixed shell includes a cover body and a connecting seat, the connecting seat is connected along the outer edge of the cover body, the connecting seat is provided with a connecting hole, and the connecting seat is connected to the valve seat through the connecting hole.

[0010] In a feasible implementation, there are multiple connecting seats, and the multiple connecting seats are arranged along the circumference of the cover body.

[0011] In a possible implementation, the lifting member is configured as a screw.

[0012] In a possible implementation, the driving member is configured as a driving nut, which is engaged with the screw rod.

[0013] In a feasible implementation, the pressure reducing valve throttling cone removal device also includes a bearing, the pulling piece is sleeved in the bearing, the driving nut contacts the inner ring of the bearing, the bearing is fixed on the fixed shell, the driving piece is connected to the inner ring of the bearing, and the bearing is located between the fixed shell and the driving piece.

[0014] In a feasible implementation, the device for removing the throttle cone of the pressure reducing valve further includes a driving handle, which is fixedly connected to the driving nut and is used to drive the nut to rotate.

[0015] In a feasible implementation, the device for removing the throttling cone of the pressure reducing valve further includes a limiter, which is fixedly connected to the screw rod and is used to limit the circumferential rotation of the screw rod.

[0016] In a feasible implementation, the driving handle is configured as a driving rod, and one end of the driving rod is fixedly connected to the driving nut.

[0017] In a feasible implementation, the limiting member is configured as a limiting rod, the limiting rod is fixed to the end of the screw rod, and the limiting rod and the screw rod are arranged perpendicular to each other.

[0018] An embodiment of the present application provides a device for removing a throttle cone of a pressure reducing valve, comprising a fixed shell and a lifting assembly. The fixed shell is used to dock with the valve seat of the pressure reducing valve; the lifting assembly comprises a lifting member and a driving member, the lifting member is passed through the fixed shell, the end of the lifting member facing the throttle cone is used to connect with the installation shaft, the driving member is sleeved on the lifting member, and the driving member is located on the side of the fixed shell facing away from the throttle cone. When removing the throttle cone of the pressure reducing valve, the fixed shell is fixed to the outer shell of the pressure reducing valve, the lifting member of the lifting assembly is connected to the throttle cone, and then the driving member is used to drive the lifting member upward, thereby separating the installation shaft from the throttle cone. The operation is simple and the separation efficiency of the two is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present application and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the overall structure of a device for removing a throttling cone of a pressure reducing valve provided in one embodiment of the present application;

[0021] Figure 2 This is a schematic diagram of the first state of the throttle cone removal device of the pressure reducing valve when the throttle cone is removed;

[0022] Figure 3 This is a schematic diagram of the second state of the throttle cone removal device of the pressure reducing valve when the throttle cone is removed;

[0023] Description of reference numerals:

[0024] 100-Fixed housing; 200-Lifting assembly; 300-Bearing; 400-Mounting shaft; 500-Throttle cone; 600-Valve seat;

[0025] 110 - housing; 120 - connecting seat; 210 - screw rod; 220 - driving nut. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solutions in this application, the following will provide a clear and complete description of the technical solutions in the embodiments of this application in conjunction with the drawings in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0027] In the description of the embodiments of the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "plurality" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0029] Combination pressure reducing valves are designed for water supply systems operating under complex operating conditions and are widely used in hydropower stations. They adjust pressure and flow by varying the opening of the throttling cone, achieving pressure reduction through the throttling effect. When inlet pressure or flow changes, the valve automatically adjusts itself using the energy of the medium itself, maintaining the outlet pressure at the preset low value.

[0030] In the related art, after the valve seat assembly is removed, the throttle cone and the mounting shaft need to be disassembled to check and treat the cavitation situation and replace the seal.

[0031] However, the throttle cone and the mounting shaft are fitted in an interference fit, and a nut is provided at the lower end to prevent loosening. The throttle cone surface is a flow-through component and is designed as a smooth transition surface to reduce cavitation. It cannot be disassembled using tools such as pullers. Due to its unique structure and fitting method, it is difficult to separate the two.

[0032] In order to solve the above problems, an embodiment of the present application provides a device for removing the throttling cone of a pressure reducing valve. The solution provided by the embodiment of the present application will be described in detail below in conjunction with the drawings in the specification.

[0033] Figure 1 This is a schematic diagram of the overall structure of a device for removing a throttling cone of a pressure reducing valve provided in one embodiment of the present application; Figure 2 1 is a schematic diagram of a first state of the throttle cone removal device for a pressure reducing valve when the throttle cone 500 is removed; Figure 3 It is a schematic diagram of the second state when the throttle cone removal device of the pressure reducing valve is removing the throttle cone 500.

[0034] Reference Figures 1 to 3 As shown, an embodiment of the present application provides a device for removing the throttle cone of a pressure reducing valve, comprising a fixed shell 100 and a lifting assembly 200. The fixed shell 100 is used to dock with the valve seat 600 of the pressure reducing valve. The lifting assembly 200 includes a lifting member and a driving member. The lifting member is passed through the fixed shell 100, and the lifting member can move in the fixed shell 100. The lifting member can be a columnar structure, and one end thereof facing the throttle cone 500 is used to connect with the installation shaft 400. The driving member is sleeved on the lifting member, and the driving member is located on the side of the fixed shell 100 facing away from the throttle cone 500. The driving member is used to move the lifting member in a direction away from the throttle cone 500. During the movement of the lifting member, the installation shaft 400 is pulled to move, thereby separating the installation shaft 400 from the throttle cone 500. The operation is simple and the efficiency of separating the two is high.

[0035] For example, a through hole is opened at the center of the fixed housing 100, and the pulling member passes through the fixed housing 100 and is arranged in the through hole. The pulling member can move along the axial direction of the through hole under the action of the driving member.

[0036] Continue to refer to Figures 1 to 3 As shown, the fixed housing 100 includes a housing 110 and a connecting seat 120. The housing 110 can be configured as a cylindrical body with an opening on one side, and its diameter corresponds to the size of the valve seat 600 of the pressure reducing valve. The connecting seats 120 are distributed and connected along the outer edge of the housing 110. In some examples, there are multiple connecting seats 120, and the multiple connecting seats 120 are evenly spaced along the circumference of the housing 110. In other examples, the connecting seat 120 is an annular member that is fixedly mounted on the outer edge of the housing 110. In addition, the connecting seat 120 is provided with a connecting hole, the location of which corresponds to the location of the fixing hole on the valve seat 600. The connecting seat 120 is connected to the valve seat 600 through the connecting hole.

[0037] Exemplarily, the lifting member is configured as a screw 210, and the driving member can be configured as a drive nut 220, which cooperates with the screw 210. The screw 210 is disposed on the housing 110, and the drive nut 220 is located on the side of the housing 110 facing away from the throttle cone 500. As the drive nut 220 rotates, the screw 210 can move along the axis of the housing 110, thereby lifting the mounting shaft 400 connected to the throttle cone 500. Furthermore, exemplarily, the diameter of the screw 210 can be configured according to the size of the connection hole on the mounting shaft 400, thereby facilitating the connection of the screw 210 to the mounting shaft 400.

[0038] When separating the mounting shaft 400 from the throttle cone 500 , a worker may use a wrench to twist the drive nut 220 , thereby moving the screw rod 210 in the axial direction.

[0039] In other examples, the pressure reducing valve throttle cone removal device further includes a drive handle. This drive handle is fixedly connected to the drive nut 220 and protrudes from the drive nut 220. When the drive nut 220 needs to be rotated, the drive handle can be directly grasped to rotate the drive nut 220 without using a wrench. For example, the drive handle can be a drive post, one end of which is fixedly connected to the side of the drive nut 220. When the drive nut 220 is engaged with the screw 210, the drive post and the screw 210 are perpendicular to each other, thereby allowing the drive nut to be rotated with less force.

[0040] In addition, in certain embodiments, the device for removing the throttle cone of a pressure reducing valve further includes a stopper fixedly connected to the screw 210. The stopper is configured to limit the circumferential rotation of the screw 210, thereby increasing the speed of axial movement of the screw 210. It is understood that due to the friction between the drive nut 220 and the screw 210, the screw 210 rotates as the drive nut 220 rotates during the process of twisting the drive nut 220. The stopper is configured to limit the circumferential rotation of the screw 210, thereby increasing the speed of axial movement of the drive nut 220 relative to the screw 210, thereby accelerating the separation of the mounting shaft 400 from the throttle cone 500.

[0041] Exemplarily, the limiting member can be configured as a limiting rod, which can be fixed to the end of the screw 210, and the limiting rod and the screw 210 are arranged perpendicular to each other. When the staff rotates the drive nut 220, they can hold the limiting rod to limit its circumferential rotation.

[0042] Continue to refer to Figures 1 to 3As shown, the pressure reducing valve throttle cone removal device also includes a bearing 300. A lifting member is sleeved within the bearing 300. A driving member (e.g., the drive nut 220) contacts the inner ring of the bearing 300. The outer ring of the bearing 300 is fixed to the stationary housing 100, and the bearing 300 is positioned between the stationary housing 100 and the driving member. When the drive nut 220 rotates, the inner ring of the bearing 300 rotates with the drive nut 220. It will be appreciated that the bearing 300 prevents direct contact between the drive nut 220 and the housing 110 of the stationary housing 100, facilitating the rotation of the drive nut 220 while preventing damage to the surface of the housing 110 during rotation.

[0043] Reference Figure 2 and Figure 3 As shown, when separating the throttle cone 500 from the mounting shaft 400, the worker first secures the end of the screw 210 facing the mounting shaft 400 to the connecting hole of the mounting shaft 400. Next, the connecting seat 120 of the fixed housing 100 is docked with the valve seat 600 of the pressure reducing valve and fastened with bolts; the cover abuts the valve seat. Then, while restricting the circumferential rotation of the screw 210, the drive nut 220 is rotated using the driving handle to move the screw 210 vertically upward, thereby pulling the mounting shaft 400. When the throttle cone 500 contacts the lower bracket of the valve seat 600, the drive nut 220 is continued to rotate, causing the screw 210 to continuously drive the mounting shaft 400 upward. Due to the blocking effect of the lower bracket, the throttle cone 500 cannot move, and it gradually separates from the mounting shaft 400.

[0044] It is easy to understand that those skilled in the art can combine, split, reorganize, etc. the embodiments of the present application based on the several embodiments provided in the present application to obtain other embodiments, and these embodiments do not exceed the scope of protection of the present application.

[0045] The above specific implementation methods further explain in detail the purpose, technical solutions and beneficial effects of the embodiments of the present application. It should be understood that the above are only specific implementation methods of the embodiments of the present application and are not intended to limit the scope of protection of the embodiments of the present application. Any modifications, equivalent replacements, improvements, etc. made on the basis of the technical solutions of the embodiments of the present application should be included in the scope of protection of the embodiments of the present application.

Claims

1. A device for removing the throttle cone of a pressure reducing valve, characterized in that: include: A fixed housing (100) for docking with a valve seat (600) of the pressure reducing valve; The lifting assembly (200) includes a lifting member and a driving member, wherein the lifting member is inserted into the fixed shell (100), and the end of the lifting member facing the throttling cone (500) is used to connect with the mounting shaft (400), and the driving member is sleeved on the lifting member, and the driving member is located on the side of the fixed shell (100) facing away from the throttling cone (500), and the driving member is used to move the lifting member in a direction away from the throttling cone (500) to disengage the mounting shaft (400) from the throttling cone (500).

2. The device for removing the throttle cone of a pressure reducing valve according to claim 1, characterized in that: The fixed housing (100) comprises a cover body (110) and a connecting seat (120), wherein the connecting seat (120) is connected along the outer edge of the cover body (110), and the connecting seat (120) is provided with a connecting hole, and the connecting seat (120) is connected to the valve seat (600) through the connecting hole.

3. The device for removing the throttle cone of a pressure reducing valve according to claim 2, characterized in that: There are a plurality of connection seats (120), and the plurality of connection seats (120) are arranged along the circumference of the cover body (110).

4. The device for removing the throttle cone of a pressure reducing valve according to claim 1, characterized in that: The lifting member is configured as a screw (210).

5. The device for removing the throttle cone of a pressure reducing valve according to claim 4, characterized in that: The driving member is configured as a driving nut (220), and the driving nut (220) is engaged with the screw (210).

6. The device for removing the throttle cone of a pressure reducing valve according to claim 1, characterized in that: The pressure reducing valve throttling cone removal device also includes a bearing (300), the pulling member is sleeved in the bearing (300), the bearing (300) is fixed on the fixed housing (100), the driving member is in contact with the inner ring of the bearing (300), and the bearing (300) is located between the fixed housing (100) and the driving member.

7. The device for removing the throttle cone of a pressure reducing valve according to claim 5, characterized in that: The pressure reducing valve throttling cone removal device further comprises a driving handle, wherein the driving handle is fixedly connected to the driving nut (220), and the driving handle is used to drive the driving nut (220) to rotate.

8. The device for removing the throttle cone of a pressure reducing valve according to claim 7, characterized in that: The device for removing the throttle cone of the pressure reducing valve further comprises a limiting member, which is fixedly connected to the screw (210) and is used to limit the circumferential rotation of the screw (210).

9. The device for removing the throttle cone of a pressure reducing valve according to claim 8, characterized in that: The driving handle is configured as a driving rod, one end of which is fixedly connected to the driving nut (220).

10. The device for removing the throttle cone of a pressure reducing valve according to claim 8, characterized in that: The limiting member is configured as a limiting rod, the limiting rod is fixed to the end of the screw rod (210), and the limiting rod and the screw rod (210) are arranged perpendicular to each other.

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