Valve sealing surface vibration grinding device and grinding method

Abstract

The invention provides a valve sealing surface vibration grinding device and method, and the device comprises a grinding device which is composed of a positioning shaft, a transmission handle, a guide sleeve and a force holding device; the top of the positioning shaft penetrates through one end of the transmission handle and is fixedly connected through a first fixing pin; the bottom of the positioning shaft penetrates through the guide sleeve and is connected with the valve head; a sliding groove is formed in the transmission handle. The interior of the sliding groove of the transmission handle is connected with one end of a force holding device through a connecting pin; the other end of the force holding device is driven by being connected with external force; the bottom of the grinding device is arranged in the valve body; according to the grinding device, the power holder is driven by external force to move, the positioning shaft drives the valve head assembly to move up and down along the Z axis, and the sealing face of the valve head assembly and the sealing face of the valve seat are continuously vibrated and ground, so that the sealing face of the valve head assembly and the sealing face of the valve seat achieve the matched adaptive effect, and the problem of mutual grinding of arc-shaped sealing faces is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of valve grinding and processing, and in particular to a valve sealing surface vibration grinding device and a grinding method. Background Art

[0002] With the expansion of application scenarios, the quick-closing valve, as one of the important components of traditional steam turbine units, has put forward higher requirements for grinding accuracy. When the quick-closing valve performs the quick-closing action, under the action of the spring force, the piston is separated from the piston disc, and the valve stem and valve head are immediately pushed to the closed position. Therefore, the sealing surface quality requirements are relatively high. Therefore, it is necessary to grind the sealing surface of the valve to make it smooth and flat to ensure the sealing effect of the valve.

[0003] When the sealing surface of the valve is an irregular arc surface, the traditional grinding method can only rely on point contact or line contact to grind the sealing surface. In addition, during the grinding process, the sealing surface is prone to adhesion and cannot be separated, causing damage to the sealing surface and destroying the surface roughness of the sealing surface. As a result, the sealing surface of the valve head assembly and the sealing surface of the valve seat cannot achieve a mutually matching adaptation effect, and the grinding is more difficult. Summary of the invention

[0004] According to the above proposal, when the valve sealing surface is an arc surface, the sealing surface is prone to adhesion and cannot be separated during the grinding process using a traditional grinding device, and the valve head assembly sealing surface and the valve seat sealing surface cannot achieve a mutually matching adaptation effect. In view of the technical problem that the arc surface grinding is difficult, a valve sealing surface vibration grinding device and grinding method are provided. The present invention mainly utilizes a force holder and a positioning shaft to drive through an external force to cause the valve head sealing surface and the valve seat sealing surface to impact and grind, so that the valve head assembly sealing surface and the valve seat sealing surface achieve a mutually matching adaptation effect, solving the problem of mutual grinding of arc surfaces.

[0005] The technical means adopted by the present invention are as follows:

[0006] A valve sealing surface vibration grinding device, comprising: a grinding device, the grinding device is composed of a positioning shaft, a guide sleeve, a transmission handle and a force holder; the top of the positioning shaft passes through one end of the transmission handle and is fixedly connected by a first fixing pin; the bottom of the positioning shaft passes through the guide sleeve and is connected to the valve head assembly; a slide groove is arranged inside the transmission handle; the slide groove of the transmission handle is connected to one end of the force holder through a connecting pin; the other end of the force holder is driven by connecting to an external force;

[0007] The bottom of the grinding device is installed inside the valve body;

[0008] The force holder drives the positioning shaft to move up and down through external force, so that the sealing surface of the valve head assembly and the sealing surface of the valve seat in the valve body are vibrated and ground.

[0009] Furthermore, the transmission handle is rotationally connected to the first fixing pin; the connecting pin is arranged in a sliding groove of the transmission handle to slide left and right.

[0010] Furthermore, after the force holder obtains the external force, it applies corresponding force to the positioning shaft to drive it; the external force is manually pulled by the operator or connected to the driving device to apply power to drive it.

[0011] Furthermore, the top outer edge of the guide sleeve matches the valve port of the valve body.

[0012] Furthermore, the bottom of the positioning shaft is connected and fixed to the bottom of the valve head assembly via a hexagonal nut.

[0013] Further, the middle connection of the force holder is connected by a second fixing pin;

[0014] Furthermore, the valve head assembly consists of a valve head and a load relief valve.

[0015] A valve sealing surface vibration grinding method, based on the above-mentioned valve sealing surface vibration grinding device, comprises the following steps:

[0016] S1: First, the sealing surface of the valve head assembly and the sealing surface of the valve seat are roughly ground;

[0017] S2: After the rough grinding is completed, the bottom of the positioning shaft is passed through the guide sleeve, and the valve head assembly is fixed to the bottom of the positioning shaft through the hexagonal nut. The top of the positioning shaft passes through one end of the transmission handle and is positioned and connected through the first fixing pin, and then one end of the force holder is connected to the slide groove of the transmission handle through the connecting pin;

[0018] S3: Place the grinding device in the valve body, match and fix the guide sleeve with the valve port of the valve body, and then place the grinding device and the valve body on a flat work surface;

[0019] S4: After the grinding device is installed, the other end of the force holder is driven by external force to drive the force holder to rotate, so that the positioning shaft moves up and down to vibrate and grind the sealing surface of the valve head assembly and the sealing surface of the valve seat, so that they can achieve a matching adaptation effect after grinding.

[0020] Compared with the prior art, the present invention has the following advantages:

[0021] 1. The present invention provides a valve sealing surface vibration grinding device and grinding method, which drives the holder to move by external force, and drives the valve head assembly to move up and down along the Z axis by the positioning shaft, so as to realize continuous vibration grinding of the sealing surface of the valve head assembly and the sealing surface of the valve seat.

[0022] 2. The grinding method of the present invention can solve the problem of grinding arc-shaped sealing surfaces against each other. When the valve head sealing surface is an irregular arc surface, the valve head assembly sealing surface and the valve seat sealing surface can achieve a mutually matching adaptation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 It is a cross-sectional schematic diagram of the combination of the grinding device and the valve body of the present invention.

[0025] Figure 2 It is a three-dimensional diagram of the grinding device of the present invention.

[0026] Figure 3 It is a schematic diagram of the mutual grinding part of the valve sealing surface of the present invention.

[0027] In the figure: 1. positioning shaft; 2. first fixing pin; 3. guide sleeve; 4. valve head assembly; 5. connecting pin; 6. transmission handle; 7. second fixing pin; 8. force holder; 9. valve body; 10. hexagonal nut; 11. valve seat. DETAILED DESCRIPTION

[0028] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0031] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, the numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0032] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0033] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below their position devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0034] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0035] like Figure 1-3 As shown, the present invention provides a valve sealing surface vibration grinding device, comprising: a grinding device and a valve body 9, wherein the grinding device is composed of a positioning shaft 1, a guide sleeve 3, a transmission handle 6 and a force holder 8; the top of the positioning shaft 1 passes through one end of the transmission handle 6 and is fixedly connected through a first fixing pin 2; the bottom of the positioning shaft 1 passes through the guide sleeve 3 and is connected to the valve head assembly 4; a slide groove is provided inside the transmission handle 6; the slide groove of the transmission handle 6 is connected to one end of the force holder 8 through a connecting pin 5; the other end of the force holder 8 is driven by connecting to an external force;

[0036] The bottom of the grinding device is installed inside the valve body 9;

[0037] The force holder 8 drives the positioning shaft 1 to move up and down through external force, so that the sealing surface of the valve head assembly 4 and the sealing surface of the valve seat 11 in the valve body 9 are vibrated and ground.

[0038] The transmission handle 6 is rotationally connected to the first fixing pin 2; the connecting pin 5 is arranged in the sliding groove of the transmission handle 6 to slide left and right.

[0039] After the force holder 8 obtains the external force, it applies corresponding force to the positioning shaft 1 to drive it; the external force is the operator manually pulling or connecting the driving device to apply power to drive it.

[0040] The top outer edge of the guide sleeve 3 matches the valve opening of the valve body 9 .

[0041] The bottom of the positioning shaft 1 is connected and fixed to the bottom of the valve head assembly 4 via a hexagonal nut 10 .

[0042] The middle connection of the force holder 8 is connected via a second fixing pin 7;

[0043] The valve head assembly 4 is composed of a valve head and a load relief valve.

[0044] A valve sealing surface vibration grinding method, based on the valve sealing surface vibration grinding device, comprises the following steps:

[0045] S1: Firstly, the sealing surface of the valve head assembly 4 and the sealing surface of the valve seat 11 are roughly ground;

[0046] S2: After the rough grinding is completed, the bottom of the positioning shaft 1 is passed through the guide sleeve 3, and the valve head assembly 4 is fixed to the bottom of the positioning shaft 1 through the hexagonal nut 10. The top of the positioning shaft 1 passes through one end of the transmission handle 6 and is positioned and connected through the first fixing pin 2, and then one end of the force holder 8 is connected to the slide groove of the transmission handle 6 through the connecting pin 5;

[0047] S3: Place the grinding device in the valve body 9, match and fix the guide sleeve 3 with the valve port of the valve body 9, and then place the grinding device and the main body of the valve body 9 on a flat work surface;

[0048] S4: After the grinding device is installed, the other end of the force holder 8 is driven by external force to rotate the force holder 8, so that the positioning shaft 1 moves up and down to vibrate and grind the sealing surface of the valve head assembly 4 and the sealing surface of the valve seat 11, so that they can achieve a matching adaptation effect after grinding.

[0049] At present, the surfacing material of the valve mouth sealing surface is Stellite alloy. The machining requirement for the sealing surface of the valve head assembly 4 and the valve seat 11 is a circular run-out of 0.05. At the same time, the surface roughness of the sealing surface of the valve seat 11 after grinding is required to be 0.8, and the surface roughness of the sealing surface of the valve head assembly 4 after grinding is required to be 0.4; the grinding line width during mutual grinding is 0.5-3mm. Since the sealing surface is an arc surface, the traditional grinding method is difficult to grind, and during the grinding process, the sealing surface is prone to adhesion and cannot be separated, causing damage to the sealing surface and destroying the surface roughness; the use of the valve sealing surface vibration grinding device and grinding method of the present invention can effectively prevent the valve seat 11 and the valve head assembly 4 from sticking and being unable to be separated.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A valve sealing surface vibration grinding device, comprising: A grinding device and a valve body (9), characterized in that the grinding device is composed of a positioning shaft (1), a guide sleeve (3), a transmission handle (6) and a force holder (8); the top of the positioning shaft (1) passes through one end of the transmission handle (6) and is fixedly connected via a first fixing pin (2); the bottom of the positioning shaft (1) passes through the guide sleeve (3) and is connected to the valve head assembly (4); a slide groove is provided inside the transmission handle (6); the slide groove of the transmission handle (6) is connected to one end of the force holder (8) via a connecting pin (5); the other end of the force holder (8) is driven by connecting to an external force; The bottom of the grinding device is installed inside the valve body (9); The force holder (8) drives the positioning shaft (1) to move up and down through external force, so that the sealing surface of the valve head assembly (4) and the sealing surface of the valve seat (11) in the valve body (9) are vibrated and ground.

2. A valve sealing surface vibration grinding device according to claim 1, characterized in that: The transmission handle (6) is rotationally connected to the first fixing pin (2); the connecting pin (5) is arranged in a sliding groove of the transmission handle (6) to slide left and right.

3. A valve sealing surface vibration grinding device according to claim 1, characterized in that: The top outer edge of the guide sleeve (3) matches the valve opening of the valve body (9).

4. A valve sealing surface vibration grinding device according to claim 1 or 2, characterized in that: The bottom of the positioning shaft (1) and the bottom of the valve head assembly (4) are connected and fixed via a hexagonal nut (10).

5. A valve sealing surface vibration grinding device according to claim 1, characterized in that: The middle connection of the force holder (8) is connected via a second fixing pin (7).

6. A valve sealing surface vibration grinding device according to claim 1, characterized in that: The valve head assembly (4) consists of a valve head and a load relief valve.

7. A valve sealing surface vibration grinding method, based on a valve sealing surface vibration grinding device according to any of claims 1 to 6, characterized in that: The steps include: S1: First, the sealing surface of the valve head assembly (4) and the sealing surface of the valve seat (11) are roughly ground; S2: After the rough grinding is completed, the bottom of the positioning shaft (1) is passed through the guide sleeve (3), and the valve head assembly (4) is fixed to the bottom of the positioning shaft (1) through the hexagonal nut (10). The top of the positioning shaft (1) passes through one end of the transmission handle (6) and is positioned and connected through the first fixing pin (2), and then one end of the force holder (8) is connected to the slide groove of the transmission handle (6) through the connecting pin (5); S3: placing the grinding device in the valve body (9), matching and fixing the guide sleeve (3) with the valve port of the valve body (9), and placing the grinding device and the main body of the valve body (9) on a flat work surface; S4: After the grinding device is installed, the other end of the force holder (8) is driven by external force to rotate the force holder (8), so that the positioning shaft (1) moves up and down to vibrate and grind the sealing surface of the valve head assembly (4) and the sealing surface of the valve seat (11), so that they can achieve a mutually matching adaptation effect after grinding.

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