Valve seat grinding device

Abstract

The utility model provides a valve seat grinding device, which belongs to the technical field of valve maintenance and is characterized in that the bottom surface of a grinding component is attached to a valve seat, and a positioning groove is formed in the center of the bottom surface of the grinding component and is used for aligning the center of the grinding component to the center of the valve seat; the top of the grinding assembly is detachably connected with a transmission rod, the transmission rod is sleeved with a guide assembly, the guide assembly is detachably arranged on the valve body, and the guide assembly is rotationally connected with the transmission rod. The grinding assembly can be placed into the air suction valve from the air outlet end, the grinding assembly is centered through a tool, it is ensured that the grinding assembly is firstly placed into the air suction valve and then assembled, and under the condition that the grinding assembly cannot be directly adjusted by hands, the grinding assembly can be adjusted and centered through the tool, so that the grinding assembly is in complete contact with the valve seat; a gap is prevented from being generated between the grinding assembly and the valve seat, it is ensured that the grinding assembly is installed in place, grinding uniformity is ensured, and grinding quality is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of valve repair, and in particular relates to a valve seat grinding device. Background Art

[0002] The boron recovery system of a nuclear power plant is a system that uses evaporation and ion exchange to treat primary coolant and recover concentrated boric acid. It can reduce the discharge of waste liquid from nuclear power plants and reduce the amount of boric acid used in nuclear power plants. The recovery process requires the system to have a certain degree of sealing to prevent the spillage of harmful substances. However, in the boron recovery process of a nuclear power plant, due to defects in the sealing surface of the air intake valve, the sealing test results of the breathing valve usually do not meet the requirements. The sealing surface of the valve needs to be tested and then ground and repaired.

[0003] However, the breathing valve has a special structure, and its valve seat diameter is larger than the flange diameter on the upper part of the intake valve body. That is to say, the diameter of the grinding plate for grinding the valve seat will be larger than the diameter of the upper part of the intake valve, making it difficult to install the existing grinding equipment, affecting the maintenance process. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0005] To this end, the utility model proposes a valve seat grinding device, including: the bottom surface of the grinding assembly is in contact with the valve seat, a positioning groove is provided at the center of the bottom surface of the grinding assembly, and the positioning groove is used to align the center of the grinding assembly with the center of the valve seat; the top of the grinding assembly is detachably connected to a transmission rod, the outside of the transmission rod is provided with a guide assembly, the guide assembly is detachably arranged on the valve body, and the guide assembly is rotatably connected to the transmission rod.

[0006] In addition, a valve seat grinding device in the above technical solution provided by the utility model may also have the following additional technical features:

[0007] Optionally, the positioning groove is in a long strip shape.

[0008] Optionally, a threaded hole is provided at the center of the top surface of the grinding assembly, an external thread is provided on the side wall at the bottom end of the transmission rod, and the transmission rod is threadedly connected to the grinding assembly.

[0009] The center line of the optional threaded hole is arranged to coincide with the center line of the grinding component.

[0010] Optionally, the top end of the transmission rod is detachably connected to the hand electric drill.

[0011] Optionally, a support frame is detachably provided on the guide assembly, and the support frame is used to support the hand electric drill.

[0012] Optionally, the grinding assembly includes a grinding plate, the bottom surface of the grinding plate is horizontal, and a positioning groove is arranged on the bottom surface of the grinding plate; grinding paper is detachably attached to the bottom surface of the grinding plate, and a clearance hole is arranged on the grinding paper to expose the positioning groove.

[0013] Optionally, the guide assembly includes a positioning portion, the positioning portion is embedded in the valve body, the top of the positioning portion is connected to a fixing portion, the fixing portion is placed on the valve body, and the fixing portion is detachably connected to the valve body.

[0014] Optionally, a support sleeve is detachably provided on the fixing portion, the support sleeve is sleeved on the outer side of the transmission rod, and the support sleeve extends in a direction away from the fixing portion.

[0015] Optionally, a plurality of rotatable balls are embedded in the support sleeve, and the balls are in rolling contact with the side walls of the transmission rod.

[0016] Compared with the prior art, the valve seat grinding device of the utility model has the following beneficial effects:

[0017] A grinding assembly that matches the size of the suction valve seat is designed. The grinding assembly can be placed into the suction valve from the outlet end, and the grinding assembly can be centered using auxiliary tools to ensure that the grinding assembly is placed into the suction valve before assembly. When the hands cannot directly enter for adjustment, the grinding assembly can be adjusted and centered outside the suction valve using auxiliary tools to make full contact with the valve seat, prevent a gap between the grinding assembly and the valve seat, ensure that the grinding assembly is installed in place, ensure the uniformity of grinding, improve the quality and efficiency of grinding, and shorten the maintenance process.

[0018] The utility model redesigns the traditional grinding plate structure so that the valve seat grinding device can use auxiliary tools to adjust and center the grinding components when the hands cannot adjust directly. The grinding plate with high plane processing accuracy is used to ensure the flatness of the sealing surface grinding; the grinding plate and the sealing surface are centered to ensure the grinding angle and grinding uniformity; the grinding plate is pasted with grinding sandpaper of different mesh sizes to ensure the roughness of the sealing grinding; the driving rod transmits the power of the grinding plate and applies appropriate pressure to meet the sealing pressure ratio requirements; the grinding process is electric to improve the grinding speed and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view of a valve seat grinding device according to one embodiment of the utility model;

[0020] Figure 2 It is a front cross-sectional view of a valve seat grinding device according to one embodiment of the utility model;

[0021] Figure 3This is a structural schematic diagram of a grinding assembly of a valve seat grinding device according to one embodiment of the utility model;

[0022] Figure 4 This is a schematic diagram of a valve seat grinding device after installation according to one embodiment of the utility model;

[0023] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is:

[0024] 10. Valve body; 11. Grinding assembly; 111. Grinding plate; 112. Grinding paper; 113. Clearance hole; 12. Positioning groove; 13. Transmission rod; 14. Guide assembly; 141. Positioning part; 142. Fixing part; 15. Support frame; 16. Support sleeve; 17. Ball. DETAILED DESCRIPTION

[0025] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, 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, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0028] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0029] See also Figure 1-Figure 4 As shown, according to an embodiment of the present application, a valve seat grinding device is provided, the bottom surface of the grinding component 11 is fitted with the valve seat, a positioning groove 12 is provided at the center of the bottom surface of the grinding component 11, and the positioning groove 12 is used to align the center of the grinding component 11 with the center of the valve seat; a transmission rod 13 is detachably connected to the top of the grinding component 11, and a guide component 14 is mounted on the outside of the transmission rod 13, the guide component 14 is detachably arranged on the valve body 10, and the guide component 14 is rotatably connected to the transmission rod 13. Install the special grinding assembly 11 from the larger-diameter air outlet end to the air inlet end; use a tool to insert the positioning groove 12 of the grinding assembly 11 from the air inlet end, and adjust the position of the grinding assembly 11 by the tool to align the grinding assembly 11 with the center of the air inlet end pipe; install the guide assembly 14 to the upper part of the air intake valve body 10, and fix the guide assembly 14 on the valve body 10; after the transmission rod 13 is inserted into the guide assembly 14, the transmission rod 13 is connected to the grinding assembly 11. When installing the transmission rod 13, use a tool to fix the grinding assembly 11 to ensure that the grinding assembly 11 does not move after being centered and is firmly connected to the transmission rod 13; the grinding assembly 11 can be driven to rotate by rotating the transmission rod 13 to grind the air intake valve seat. The grinding assembly 11 is designed to match the size of the intake valve seat, and the grinding assembly 11 can be placed into the intake valve from the air outlet end; after the grinding assembly 11 is placed into the intake valve, in the case of limited space, the grinding assembly 11 is centered using auxiliary tools to ensure that the grinding assembly 11 is placed into the intake valve before assembly; when the hands cannot directly enter for adjustment, the grinding assembly 11 can be adjusted and centered outside the intake valve using auxiliary tools to make the grinding assembly 11 fully contact with the valve seat, prevent a gap between the grinding assembly 11 and the valve seat, ensure that the grinding assembly 11 is installed in place, ensure the uniformity of grinding, and improve the quality and efficiency of grinding.

[0030] It should be noted that for the grinding of flat seals, the following four aspects are mainly controlled: flatness, angle, roughness and sealing pressure ratio. The flatness of the sealing surface grinding is ensured by the grinding component 11 with high plane machining accuracy; the grinding angle and grinding uniformity are ensured by aligning the grinding component 11 with the sealing surface before installing the valve seat grinding device; the roughness of the sealing grinding is ensured to meet the standard by replacing the grinding components 11 with different mesh sizes; the grinding power is transmitted by the transmission rod 13 and the appropriate pressure is applied to meet the sealing pressure ratio requirements.

[0031] Further, such as Figure 2As shown, the transmission rod 13 is connected to the grinding assembly 11 by threads. The transmission rod 13 is inserted into the grinding assembly 11 and can be assembled to the transmission rod 13 outside the intake valve by rotation. This solves the problem that the internal space of the intake valve is small and the hands cannot penetrate deeply to install and adjust the grinding assembly 11, reduces the difficulty of disassembly and assembly of the valve seat grinding device, and has a wide range of applications.

[0032] like Figure 2-3 As shown, the positioning groove 12 is in the shape of a long strip. By making the positioning groove 12 in the shape of a long strip, a slotted screwdriver head is inserted into the positioning groove 12, so that the grinding assembly 11 can be adjusted and centered, and when the transmission rod 13 is disassembled, the grinding assembly 11 and the transmission rod 13 are prevented from rotating synchronously, thereby improving the disassembly and assembly efficiency of the valve seat grinding device.

[0033] Furthermore, the shape of the positioning groove 12 matches the shape of the auxiliary tool to prevent the gap between the tool and the positioning groove 12 from being too large, thereby ensuring accurate positioning of the grinding assembly 11 .

[0034] like Figure 2 As shown, a threaded hole is provided at the center of the top surface of the grinding assembly 11, and an external thread is provided on the side wall of the bottom end of the transmission rod 13, and the transmission rod 13 is threadedly connected with the grinding assembly 11. By providing a threaded hole on the grinding assembly 11 and providing an external thread on the outer wall of the transmission rod 13, the transmission rod 13 and the grinding assembly 11 can be detachably connected without the need for hand support, which is suitable for grinding valve bodies 10 with smaller diameters.

[0035] The center line of the threaded hole is arranged to coincide with the center line of the grinding assembly 11. By coinciding the center line of the threaded hole with the grinding assembly 11, it is ensured that the axis of the drive rod 13 and the positioning groove 12 are both on the center line of the grinding assembly 11 after installation, and that the grinding assembly 11 does not deflect after centering when the drive rod 13 rotates, thereby ensuring the fit between the grinding assembly 11 and the grinding surface of the valve seat and improving the grinding quality.

[0036] The top end of the transmission rod 13 is detachably connected to the hand drill. By making the transmission rod 13 detachably connected to the hand drill, the hand drill is used to drive the transmission rod 13 to rotate, drive the grinding assembly 11 to rotate, grind the suction valve seat, and improve the grinding speed and efficiency.

[0037] Furthermore, by adjusting the pressure on the hand drill, the friction between the grinding assembly 11 and the valve seat can be changed to ensure that a suitable pressure is applied to the grinding assembly 11, thereby satisfying the sealing pressure ratio requirement.

[0038] like Figure 1-2As shown, a support frame 15 is detachably provided on the guide assembly 14, and the support frame 15 is used to support the hand drill. By arranging the support frame 15 on the guide assembly 14 to support the hand drill, it replaces the hand-held hand drill, saves manpower, and is easy to use.

[0039] Furthermore, the weight of the hand drill and the grinding assembly 11 itself acts as pressure, which can also ensure that the grinding assembly 11 fits tightly against the valve seat, thereby grinding the valve seat.

[0040] like Figure 2-3 As shown, the grinding assembly 11 includes a grinding plate 111, the bottom surface of the grinding plate 111 is horizontal, and a positioning groove 12 is arranged on the bottom surface of the grinding plate 111; a grinding paper 112 is detachably attached to the bottom surface of the grinding plate 111, and a clearance hole 113 is arranged on the grinding paper 112 to expose the positioning groove 12. Ensure that the bottom surface of the grinding plate 111 is sufficiently flat, and then the grinding paper 112 is attached to the grinding plate 111, so that the grinding paper 112 of different specifications and meshes can be replaced according to the grinding requirements; the clearance hole 113 is arranged on the grinding paper 112, which can discharge glue and air, ensure that the grinding paper 112 is flat after being attached, and ensure that the auxiliary tool can be smoothly inserted into the positioning groove 12, prevent the grinding paper 112 from tilting, and ensure that the grinding paper 112 is flat and firm after being attached.

[0041] like Figure 1-2 As shown, the guide assembly 14 includes a positioning portion 141, the positioning portion 141 is embedded in the valve body 10, the top of the positioning portion 141 is connected to a fixing portion 142, the fixing portion 142 is placed on the valve body 10, and the fixing portion 142 is detachably connected to the valve body 10. The fixing portion 142 is connected to the positioning portion 141, and the positioning portion 141 is embedded in the valve body 10 to limit the fixing portion 142, so that the fixing portion 142 is easily fixed on the valve seat.

[0042] Furthermore, the fixing portion 142 and the valve seat are fixed by bolts, so that the fixing portion and the valve seat can be quickly assembled and disassembled.

[0043] like Figure 1-2 As shown, a support sleeve 16 is detachably provided on the fixing portion 142, and the support sleeve 16 is sleeved on the outside of the transmission rod 13, and the support sleeve 16 extends in a direction away from the fixing portion 142. By setting the support sleeve 16 along the axial direction of the transmission rod 13, the contact length between the guide assembly 14 and the transmission rod 13 is increased, and the transmission rod 13 is prevented from tilting due to uneven force during the grinding process, thereby preventing the grinding assembly 11 from tilting, and ensuring that the grinding angle and uniformity meet the standards.

[0044] like Figure 2As shown, a plurality of rotatable balls 17 are embedded in the support sleeve 16, and the balls 17 are in rolling contact with the side wall of the transmission rod 13. By arranging the balls 17 in the support sleeve 16 to provide rolling support for the transmission rod 13, the friction force on the transmission rod 13 is reduced, the loss is reduced, and the frictional heating or debris generation is avoided. Since the balls 17 can rotate freely in the support sleeve 16, the balls 17 can provide rolling support when the guide assembly 14 is disassembled and assembled, thereby preventing the contact surface between the guide assembly 14 and the transmission rod 13 from being worn and reducing the loss.

[0045] It should be noted that if Figure 2 As shown, there is a gap between the guide assembly 14 and the transmission rod 13 to ensure that the transmission rod can rotate relative to the guide assembly 14 and reduce friction.

[0046] It is easy for those skilled in the art to understand that, under the premise of no conflict, the above-mentioned advantageous methods can be freely combined and superimposed.

[0047] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A valve seat grinding device, characterized in that: The valve seat grinding device comprises: The bottom surface of the grinding assembly fits with the valve seat, and a positioning groove is provided at the center of the bottom surface of the grinding assembly, and the positioning groove is used to align the center of the grinding assembly with the center of the valve seat; the top of the grinding assembly is detachably connected to a transmission rod, and the outside of the transmission rod is provided with a guide assembly, and the guide assembly is detachably arranged on the valve body, and the guide assembly is rotatably connected to the transmission rod.

2. A valve seat grinding device according to claim 1, characterized in that: The positioning groove is in a long strip shape.

3. A valve seat grinding device according to claim 1, characterized in that: A threaded hole is arranged at the center of the top surface of the grinding assembly, an external thread is arranged on the side wall of the bottom end of the transmission rod, and the transmission rod is threadedly connected with the grinding assembly.

4. A valve seat grinding device according to claim 3, characterized in that: The center line of the threaded hole is arranged to coincide with the center line of the grinding assembly.

5. A valve seat grinding device according to claim 1, characterized in that: The top end of the transmission rod is detachably connected to the hand electric drill.

6. A valve seat grinding device according to claim 5, characterized in that: A support frame is detachably provided on the guide assembly, and the support frame is used to support the hand electric drill.

7. A valve seat grinding device according to claim 1, characterized in that: The grinding assembly comprises a grinding plate, the bottom surface of which is horizontal and the positioning groove is arranged on the bottom surface of the grinding plate; grinding paper is detachably attached to the bottom surface of the grinding plate, and a clearance hole is arranged on the grinding paper to expose the positioning groove.

8. A valve seat grinding device according to claim 1, characterized in that: The guide assembly comprises a positioning portion, the positioning portion is embedded in the valve body, the top of the positioning portion is connected to a fixing portion, the fixing portion is placed on the valve body, and the fixing portion is detachably connected to the valve body.

9. A valve seat grinding device according to claim 8, characterized in that: A support sleeve is detachably provided on the fixing portion, the support sleeve is sleeved on the outer side of the transmission rod, and the support sleeve extends in a direction away from the fixing portion.

10. A valve seat grinding device according to claim 9, characterized in that: A plurality of rotatable balls are embedded in the support sleeve, and the balls are in rolling contact with the side walls of the transmission rod.

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