Valve seat grinding tool for stop valve

Abstract

The utility model discloses a valve seat grinding tool for a stop valve, which relates to the technical field of valve maintenance and comprises a grinding rod and a guide component. The grinding rod is provided with a first end and a second end which are oppositely arranged, the first end of the grinding rod is provided with a grinding inclined surface for grinding the conical sealing surface of the valve seat, and the second end of the grinding rod is provided with a holding part convenient to operate; the guide assembly comprises a first guide piece arranged at the first end of the grinding rod and a second guide piece arranged on the grinding rod in a sleeving mode and movably matched with the grinding rod, when the grinding inclined face is attached to the conical sealing face of the valve seat, the first guide piece is attached to the end face of the conical sealing face, and the second guide piece is used for being attached to the inner wall of the valve seat. The valve seat grinding tool for the stop valve provided by the utility model can be used for the stop valve with a deeper valve cavity and inclined installation, so that the centering property of the grinding tool is ensured, the adaptability of the grinding tool is improved, and the grinding effect of a conical sealing surface of the valve seat is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of valve repair, and more specifically to a valve seat grinding tool for a stop valve. Background Art

[0002] For the non-detachable stop valve seat, after the valve is disassembled, if the conical sealing surface of the valve seat is found to be damaged, if it is not properly handled, it will lead to poor sealing, and even the entire stop valve needs to be replaced. In general, the defects of the conical sealing surface of the valve seat are ground and eliminated. However, for stop valves with deep valve cavities and inclined installations, it is difficult to center the grinding tool, and it is inconvenient to grind the conical sealing surface of the valve seat, and the grinding effect is poor, which makes the adaptability of the grinding tool poor.

[0003] Therefore, how to improve the adaptability of the grinding tool and ensure the grinding effect of the conical sealing surface of the valve seat has become a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a valve seat grinding tool for a stop valve, so as to improve the adaptability of the grinding tool and ensure the grinding effect of the conical sealing surface of the valve seat.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A valve seat grinding tool for a stop valve, comprising a grinding rod and a guide assembly, wherein:

[0007] The grinding rod has a first end and a second end that are arranged opposite to each other, the first end of the grinding rod is provided with a grinding bevel for grinding the conical sealing surface of the valve seat, and the second end of the grinding rod is provided with a gripping portion that is convenient for operation;

[0008] The guide assembly includes a first guide member arranged at the first end of the grinding rod and a second guide member sleeved on the grinding rod and movably cooperated with the grinding rod. When the grinding bevel is in contact with the conical sealing surface of the valve seat, the first guide member is in contact with the end surface of the conical sealing surface, and the second guide member is used to be in contact with the inner wall of the valve seat.

[0009] Optionally, in the above-mentioned valve seat grinding tool, the first guide member is annularly arranged along the outer side of the first end of the grinding rod, so as to form an annular fitting surface on a side of the first guide member close to the grinding bevel.

[0010] Optionally, in the above-mentioned valve seat grinding tool, the second guide member is an annular structure, and the second guide member is clearance-matched with the grinding rod.

[0011] Optionally, in the above valve seat grinding tool, the outer diameter of the second guide is larger than the outer diameter of the first guide.

[0012] Optionally, in the above valve seat grinding tool, an annular support surface for supporting the second guide is provided on the inner wall of the valve seat.

[0013] Optionally, in the above valve seat grinding tool, the outer diameter of the second guide is larger than the inner diameter of the annular support surface.

[0014] Optionally, in the above valve seat grinding tool, the holding portion includes an anti-slip surface provided at the second end of the grinding rod.

[0015] Optionally, in the above valve seat grinding tool, knurling is provided on the anti-slip surface.

[0016] Optionally, in the above valve seat grinding tool, the grinding inclined surface is a conical inclined surface circumferentially provided at the first end of the grinding rod, and a grinding sand layer for fitting with the conical sealing surface of the valve seat is provided on the grinding inclined surface.

[0017] Optionally, in the above valve seat grinding tool, the grinding sand layer includes grinding sandpaper, and the grinding sandpaper is attached to the grinding inclined surface.

[0018] For the valve seat grinding tool for a globe valve provided by the present utility model, the grinding inclined surface provided at the first end of the grinding rod fits with the conical sealing surface of the valve seat, so that the grinding rod is rotated through the holding portion at the second end of the grinding rod, thereby realizing the grinding effect of the grinding inclined surface on the conical sealing surface of the valve seat. At the same time, by fitting the first guide with the end surface of the conical sealing surface, sleeving the second guide on the grinding rod, and making the second guide fit with the inner wall of the valve seat, furthermore, through the limiting action of the first guide and the second guide, the centering of the grinding tool is ensured, the deviation during the grinding of the conical sealing surface can be effectively avoided, and the grinding effect is improved. As can be seen from the above examples, the valve seat grinding tool for a globe valve provided by the present utility model can be used for globe valves with a deeper valve cavity and inclined installation, thereby ensuring the centering of the grinding tool, improving the adaptability of the grinding tool, and ensuring the grinding effect of the conical sealing surface of the valve seat.

[0019] The technical features mentioned above, the technical features to be mentioned below, and the technical features shown separately in the drawings can be arbitrarily combined with each other, as long as the combined technical features are not mutually contradictory. All feasible feature combinations are the technical contents clearly recorded herein. Any one of the sub-features included in the same statement can be independently applied without necessarily being applied together with other sub-features. Description of the Drawings

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0021] Figure 1 The structural schematic diagram of the valve seat grinding tool provided by the embodiment of the present utility model.

[0022] Among them, 100 is the grinding rod, 101 is the grinding inclined surface, 102 is the holding part, 1021 is the anti-slip surface, 103 is the first guiding part, 1031 is the annular fitting surface, and 104 is the second guiding part. Specific embodiments

[0023] The core of the present utility model is to provide a valve seat grinding tool for a globe valve to improve the adaptability of the grinding tool and ensure the grinding effect of the conical sealing surface of the valve seat.

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0025] For the non-removable globe valve seat, after the valve is disassembled, when damage is found on the conical sealing surface of the valve seat, if not properly handled, it will lead to poor sealing, and even the entire globe valve needs to be replaced. Generally, the defect of the conical sealing surface of the valve seat is ground and eliminated by grinding the conical sealing surface of the valve seat. However, for globe valves with a deeper valve cavity and inclined installation, it is more difficult to center the grinding tool, it is more inconvenient to grind the conical sealing surface of the valve seat, and the grinding effect is poor, thus making the adaptability of the grinding tool poor.

[0026] For this reason, as Figure 1 shown, the embodiment of the present utility model discloses a valve seat grinding tool for a globe valve, including a grinding rod 100 and a guiding assembly. By the guiding assembly, the centering of the valve seat grinding tool is maximally ensured, so that the valve seat grinding tool can be used for globe valves with a deeper valve cavity and inclined installation, improving the adaptability of the grinding tool and ensuring the grinding effect of the conical sealing surface of the valve seat.

[0027] The following will combine Figure 1 to specifically explain and illustrate the valve seat grinding tool for a globe valve disclosed in the embodiment of the present utility model.

[0028] Among them, as Figure 1 shown, the grinding rod 100 has two relatively arranged ends. For the convenience of understanding, the two ends of the grinding rod 100 are respectively defined as the first end and the second end. A grinding inclined surface 101 that fits with the conical sealing surface of the valve seat is provided at the first end of the grinding rod 100, so as to realize the grinding of the conical sealing surface by the grinding inclined surface 101 by rotating the grinding rod 100 until the defects of the conical sealing surface are eliminated. At the same time, a holding part 102 convenient for operation is provided at the second end of the grinding rod 100 to facilitate the operator to manually grind the valve seat.

[0029] In addition, in order to facilitate the centering of the valve seat grinding tool and avoid deviation during the grinding of the conical sealing surface of the valve seat, the valve seat grinding tool includes a guiding component. Specifically, the guiding component includes a first guiding member 103 provided at the first end of the grinding rod 100 and a second guiding member 104 sleeved on the grinding rod 100 and movably matched with the grinding rod 100. When the conical sealing surface of the valve seat is ground by the valve seat grinding tool, at this time, the grinding inclined surface 101 fits with the conical sealing surface of the valve seat, and at the same time, the first guiding member 103 fits with the end surface of the conical sealing surface, and the second guiding member 104 fits with the inner wall of the valve seat. Thus, through the limiting action of the first guiding member 103 and the second guiding member 104, the centering of the grinding tool is ensured, and deviation during the grinding of the conical sealing surface can be effectively avoided, improving the grinding effect. As can be seen from the above example, whether it is a globe valve with a deeper valve cavity or a globe valve installed obliquely, the guiding component can be used for limiting, so as to achieve a convenient and fast centering effect, avoid deviation during the grinding of the conical sealing surface of the valve seat, ensure the grinding effect, and improve the adaptability of the valve seat grinding tool.

[0030] Furthermore, as Figure 1 shown, the first guiding member 103 is annularly arranged along the outer side of the first end of the grinding rod 100, so as to form an annular fitting surface 1031 on the side of the first guiding member 103 close to the grinding inclined surface 101. Among them, the first guiding member 103 can be integrally processed with the grinding rod 100 or can adopt a split structure, and is simultaneously fixed to the outer side of the first end of the grinding rod 100 through thread fitting, so that when the grinding inclined surface 101 fits with the conical sealing surface, the annular fitting surface 1031 of the first guiding member 103 fits with the end surface of the conical sealing surface, thereby ensuring the centering of the valve seat grinding tool and the conical sealing surface of the valve seat.

[0031] Furthermore, as Figure 1As shown, the second guide 104 is an annular structure, the outer diameter of the second guide 104 is greater than the outer diameter of the first guide 103, and the second guide 104 and the grinding rod 100 are in clearance fit, so that the grinding rod 100 can rotate relative to the second guide 104, and the second guide 104 can slide along the grinding rod 100 to adapt to stop valves with different valve cavity depths. In addition, an annular support surface supporting the second guide 104 is provided on the inner wall of the valve seat, and the outer diameter of the second guide 104 is greater than the inner diameter of the annular support surface to ensure that the annular support surface stably supports the second guide 104, and the circumferential surface of the second guide 104 is in contact with the inner wall of the valve seat, so as to further limit the valve seat grinding tool and ensure the centering of the valve seat grinding tool and the conical sealing surface of the valve seat.

[0032] Furthermore, if Figure 1 As shown, in order to facilitate the operator to rotate the grinding rod 100 through the gripping portion 102, the gripping portion 102 includes an anti-slip surface 1021 provided at the second end of the grinding rod 100. In this embodiment, the anti-slip surface 1021 is provided with knurling to prevent the operator from slipping when rotating the grinding rod 100. Of course, horizontal and vertical cross grains can also be provided on the anti-slip surface 1021 to increase the friction force when the operator holds the grinding rod 100, so that the operator can rotate the grinding rod 100 through the gripping portion 102 more conveniently and labor-savingly, thereby improving the grinding efficiency.

[0033] Furthermore, the grinding bevel 101 is a conical bevel arranged along the circumference of the first end of the grinding rod 100 so as to better fit with the conical sealing surface of the valve seat, and a grinding sand layer fitting with the conical sealing surface of the valve seat is arranged on the grinding bevel 101. In this embodiment, the grinding sand layer includes grinding sandpaper, and the grinding sandpaper is fitted on the grinding bevel 101.

[0034] When it is necessary to grind the conical sealing surface of the valve seat, first stick appropriate grinding sandpaper on the grinding bevel 101, and then extend the first end of the grinding rod 100 into the interior of the valve seat so that the grinding bevel 101 of the grinding rod 100 fits the conical sealing surface. At the same time, the valve seat grinding tool is limited by the first guide 103 and the second guide 104 to ensure the centering of the valve seat grinding tool. At this time, the operator rotates the grinding rod 100 to grind the conical sealing surface of the valve seat through the grip 102 until the defects of the conical sealing surface are eliminated. Finally, perform a blue oil test on the valve disc and valve seat to confirm that the sealing line is continuous and uniform. It should be noted that during the grinding process, the sandpaper needs to be replaced according to the condition of the valve seat sealing surface, from coarse to fine, until the defects of the sealing surface are eliminated.

[0035] In the description, claims and above-mentioned drawings of the present utility model, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprise" and "have" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that comprises a series of steps or units is not limited to the listed steps or units, but may include steps or units not listed.

[0036] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A valve seat grinding tool for a stop valve, characterized in that: It comprises a grinding rod (100) and a guide assembly, wherein: The grinding rod (100) has a first end and a second end that are arranged opposite to each other, the first end of the grinding rod (100) is provided with a grinding bevel (101) for grinding the conical sealing surface of the valve seat, and the second end of the grinding rod (100) is provided with a gripping portion (102) that is easy to operate; The guide assembly comprises a first guide member (103) arranged at the first end of the grinding rod (100) and a second guide member (104) sleeved on the grinding rod (100) and movably matched with the grinding rod (100); when the grinding bevel (101) is in contact with the conical sealing surface of the valve seat, the first guide member (103) is in contact with the end surface of the conical sealing surface, and the second guide member (104) is used to be in contact with the inner wall of the valve seat.

2. The valve seat grinding tool according to claim 1, characterized in that: The first guide member (103) is annularly arranged along the outer side of the first end of the grinding rod (100), so as to form an annular fitting surface (1031) on the side of the first guide member (103) close to the grinding bevel (101).

3. The valve seat grinding tool according to claim 2, characterized in that: The second guide member (104) is an annular structure, and the second guide member (104) is clearance-matched with the grinding rod (100).

4. The valve seat grinding tool according to claim 3, characterized in that: The outer diameter of the second guide member (104) is greater than the outer diameter of the first guide member (103).

5. The valve seat grinding tool according to claim 3, characterized in that: The inner wall of the valve seat is provided with an annular supporting surface for supporting the second guide member (104).

6. The valve seat grinding tool according to claim 5, characterized in that: The outer diameter of the second guide member (104) is greater than the inner diameter of the annular support surface.

7. The valve seat grinding tool according to claim 1, characterized in that: The gripping portion (102) comprises an anti-slip surface (1021) arranged on the second end of the grinding rod (100).

8. The valve seat grinding tool according to claim 7, characterized in that: The anti-slip surface (1021) is provided with knurling.

9. The valve seat grinding tool according to claim 1, characterized in that: The grinding bevel (101) is a conical bevel arranged along the circumference of the first end of the grinding rod (100), and a grinding sand layer is arranged on the grinding bevel (101) for fitting with the conical sealing surface of the valve seat.

10. The valve seat grinding tool according to claim 9, characterized in that: The grinding sand layer comprises grinding sandpaper, and the grinding sandpaper is attached to the grinding bevel (101).

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