Portable centering and grinding device for valve seat of stop valve

Abstract

The invention discloses a portable centering and grinding device for a valve seat of a stop valve, comprising a centering assembly which is integrally and fixedly arranged outside the valve seat of the stop valve; the center position of the centering assembly and the center position of the valve seat are located on the same vertical line, so that it is guaranteed that a follow-up grinding device is located in the center of the valve seat, and it is guaranteed that deviation does not occur in normal grinding. The bottom of the grinding assembly is attached to the interior of the stop valve seat, and the upper middle area of the grinding assembly movably penetrates through the center of the centering assembly; by means of the design, the adaptive grinding disc is selected, the back face of the grinding disc is adhered with the gum abrasive paper, selection is conducted according to the grinding mesh number, in the grinding process, centering operation is conducted by adjusting the centering positioning block, the adjusting rod, the positioning locking block and the locking bolt, valve grinding operation can be achieved, and the device is convenient, fast, efficient and high in practicability. The valve seat of the stop valve can be automatically centered, the problem of eccentric wear caused by misalignment is solved, and the valve seat centering device is suitable for grinding stop valves with the caliber of DN200 or below.

Description

Technical Field

[0001] The invention belongs to the technical field of stop valves, and in particular relates to a convenient stop valve seat centering grinding device. Background Art

[0002] The stop valve is a commonly used pipeline installation valve. Its opening and closing parts are plug-shaped valve discs, the sealing surface is flat or conical, and the valve disc moves linearly along the center line of the fluid. The stop valve is mainly used for full opening and full closing operations, and has good cutting performance and flow capacity. It has a simple structure, is easy to manufacture and maintain, and has a long service life. It can be used in pipeline systems of various media (such as water, steam, oil and gas, etc.), and is suitable for different industries and fields. However, the stop valve also has some disadvantages, such as large internal resistance that will cause a certain amount of pressure loss, relatively poor adjustment performance, and large switching torque. Therefore, in specific applications, it is necessary to select and adjust according to actual needs; the valve is an important component used to change the passage section and the flow direction of the medium in the fluid conveying system, and control the flow of the conveying medium. Due to long-term operation, the sealing surface will have problems such as wear and corrosion, resulting in damage to the sealing surface, resulting in leakage. The internal leakage of the stop valve is mainly based on the sealing of the valve disc and the valve seat. At present, the best treatment method is to use a special grinding tool for grinding.

[0003] However, during the grinding process, the existing grinding tools may cause the valve seat to be ground offset and the grinding sealing surface to be damaged due to the misalignment of the grinding handle and the connecting rod, the offset of the middle position, and the uneven hand strength. Summary of the invention

[0004] The object of the present invention is to provide a convenient stop valve seat centering grinding device to solve the problem that the existing grinding device mentioned in the above background technology cannot be quickly and efficiently centered during use, which affects the subsequent grinding.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a convenient stop valve seat centering and grinding device, including a centering component, which is integrally fixed to the outside of the stop valve seat; the center position of the centering component and the center position of the valve seat are on the same vertical line, so as to ensure that the subsequent grinding device is in the center of the valve seat and ensure that normal grinding will not deviate; the grinding component, the bottom of which fits with the inside of the stop valve seat, and the upper middle area is movable through the center of the centering component, and the stop valve seat is ground by the grinding component.

[0006] As a preferred technical solution in the present invention, the centering component includes a positioning sleeve and a bearing installed at the center position of the positioning sleeve. The bearing is movably connected to the grinding component. When the grinding component rotates around its own axis, the centering limit of the grinding component can be achieved by the bearing, and the normal rotation of the grinding component can be ensured not to be affected.

[0007] As a preferred technical solution in the present invention, screw holes are provided at equal angles on the outer surface of the positioning sleeve, a sliding rod is screwed into each screw hole, a slider is sleeved on the sliding rod, the bottom of the slider has an opening and forms a slot, a locking bolt that penetrates into the slot is also screwed into the bottom end of the slider, during installation, the slider is moved to a suitable position on the sliding rod according to the size specifications of the stop valve seat, and the slot is clamped in the flange end face of the stop valve seat, and then the locking bolt is tightened so that the locking bolt is abutted against the flange end face of the stop valve seat. It should be noted that before fixing, it is necessary to ensure that the centers of the bearing and the valve seat coincide in the vertical line, so as to achieve installation limit for the entire centering assembly, thereby ensuring that the center position of the grinding assembly will not be offset.

[0008] As a preferred technical solution in the present invention, a movable hole is provided on the surface of the slider for the sliding rod to pass through, and a locking bolt is screwed into the movable hole at the top of the slider, and the locking bolt is abutted against the sliding rod to ensure that the slider can be fixed at any position on the sliding rod.

[0009] As a preferred technical solution in the present invention, the grinding assembly includes a grinding rod passing through the bearing, a grinding disc is rotatably provided at the bottom of the grinding rod, and adhesive-backed sandpaper is also adhered to the bottom end of the grinding disc. The grinding disc and the adhesive-backed sandpaper are driven to rotate by the grinding rod to realize the grinding processing of the stop valve seat, and the axial position of the grinding rod is limited by the bearing, so that no deviation will occur.

[0010] As a preferred technical solution in the present invention, a handle is also screwed on the top of the grinding rod, and the handle and the grinding rod are perpendicular to each other. The setting of the handle can ensure that the grinding force is uniform during grinding.

[0011] As a preferred technical solution in the present invention, at least three sliding rods are provided, and the diameter of the sliding rods is equal to the inner diameter of the slot.

[0012] As a preferred technical solution in the present invention, the outer ring portion of the bearing is fixed to the inner wall of the positioning sleeve, and the inner ring portion is fitted to the grinding rod, thereby achieving the installation of the bearing and ensuring the normal rotation of the grinding rod.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Through the design of the present invention, an appropriate grinding disc is selected, and adhesive-backed sandpaper is adhered to the back of the grinding disc, and the selection is made according to the grinding mesh number. During the grinding process, the centering operation is performed by adjusting the centering positioning block and the adjusting rod, the positioning locking block and the locking bolt, so that the valve grinding operation can be realized. The device is convenient and efficient, and can automatically center the stop valve seat to solve the problem of eccentric wear caused by misalignment. It is suitable for the grinding of stop valves with a caliber of less than DN200, is convenient, flexible and changeable, solves the shortcomings of the existing grinding device in use, improves the centering degree during the grinding process, and also improves the grinding work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the present invention;

[0016] Figure 2 A bottom view of the present invention;

[0017] Figure 3 It is a bottom view of the present invention with the adhesive backing sandpaper removed;

[0018] Figure 4 It is a structural schematic diagram of the slider of the present invention.

[0019] In the figure:

[0020] 100, positioning sleeve; 101, sliding rod;

[0021] 102, slider; 102a, slot; 102b, moving hole; 102c, locking bolt; 102d, tightening bolt;

[0022] 103. Bearings;

[0023] 200, grinding rod; 201, handle; 202, grinding disc; 203, adhesive-backed sandpaper. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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. 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.

[0025] See also Figures 1 to 4 The present invention provides a technical solution: a convenient stop valve seat centering grinding device, comprising

[0026] The centering component is integrally fixed on the outside of the stop valve seat; the center position of the centering component and the center position of the valve seat are on the same vertical line, so as to ensure that the subsequent grinding device is in the center of the valve seat and that normal grinding will not deviate;

[0027] The bottom of the grinding component is fitted with the inside of the stop valve seat, and the upper middle area is intersected with the center of the centering component. The stop valve seat is ground by the grinding component.

[0028] In this embodiment, the centering component includes a positioning sleeve 100 and a bearing 103 installed at the center position of the positioning sleeve 100. The bearing 103 is movably connected to the grinding component. When the grinding component rotates around its own axis, the bearing 103 can be used to limit the centering of the grinding component and ensure that the normal rotation of the grinding component is not affected.

[0029] In this embodiment, screw holes are opened at equal angles on the outer surface of the positioning sleeve 100, and a sliding rod 101 is screwed into each screw hole. A slider 102 is sleeved on the sliding rod 101, and the bottom of the slider 102 has an opening and forms a slot 102a. A tightening bolt 102d that penetrates into the slot 102a is also screwed into the bottom end of the slider 102. During installation, the slider 102 is moved to a suitable position on the sliding rod 101 according to the size specifications of the stop valve seat, and the slot 102a is stuck in the flange end face of the stop valve seat, and then the tightening bolt 102d is tightened so that the tightening bolt 102d is abutted against the flange end face of the stop valve seat. It should be noted that before fixing, it is necessary to ensure that the center of the bearing 103 and the valve seat coincide in the vertical line, so as to achieve installation limit for the entire centering assembly, thereby ensuring that the center position of the grinding assembly will not be offset.

[0030] In this embodiment, a movable hole 102b is further provided on the surface of the slider 102 for the slide rod 101 to movably pass through. A locking bolt 102c is also screwed into the movable hole 102b at the top of the slider 102. The locking bolt 102c abuts against the slide rod 101, thereby ensuring that the slider 102 can be fixed on the slide rod 101 to any position.

[0031] In this embodiment, the grinding assembly includes a grinding rod 200 that passes through the bearing 103, and a grinding disc 202 is rotated at the bottom of the grinding rod 200. The bottom end of the grinding disc 202 is also adhered to a self-adhesive sandpaper 203. The grinding rod 200 drives the grinding disc 202 and the self-adhesive sandpaper 203 to rotate, thereby realizing the grinding processing of the stop valve seat, and the axial position of the grinding rod 200 is limited by the bearing 103, so no deviation will occur.

[0032] In this embodiment, a handle 201 is screwed onto the top of the grinding rod 200. The handle 201 and the grinding rod 200 are perpendicular to each other. The arrangement of the handle 201 can ensure that the grinding force is uniform during grinding.

[0033] In this embodiment, at least three sliding bars 101 are provided, and the diameter of the sliding bars 101 is equal to the inner diameter of the slot 102 a.

[0034] In this embodiment, the outer ring portion of the bearing 103 is fixed to the inner wall of the positioning sleeve 100, and the inner ring portion is fitted to the grinding rod 200, thereby achieving the installation of the bearing 103 and ensuring the normal rotation of the grinding rod 200.

[0035] Although embodiments of the present invention have been shown and described (see the above detailed description for details), it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A convenient stop valve seat centering grinding device, characterized in that: include A centering component is integrally fixed outside the valve seat of the stop valve; the center position of the centering component and the center position of the valve seat are on the same vertical line; The bottom of the grinding component is fitted with the inside of the stop valve seat, and the upper middle area is movably penetrated with the center of the centering component.

2. A convenient stop valve seat centering grinding device according to claim 1, characterized in that: The centering component comprises a positioning sleeve (100) and a bearing (103) installed at the center of the positioning sleeve (100), and the bearing (103) movably penetrates the grinding component.

3. A convenient stop valve seat centering grinding device according to claim 2, characterized in that: The outer surface of the positioning sleeve (100) is provided with screw holes at equal angles, and a slide rod (101) is screwed into each screw hole. A slider (102) is sleeved on the slide rod (101), and the bottom of the slider (102) has an opening and forms a slot (102a). A tightening bolt (102d) penetrating into the slot (102a) is screwed into the bottom end of the slider (102).

4. A convenient stop valve seat centering grinding device according to claim 3, characterized in that: The surface of the slider (102) is also provided with a moving hole (102b) for the slide bar (101) to movably pass through, and a locking bolt (102c) is screwed into the top of the slider (102) and passes through the moving hole (102b), and the locking bolt (102c) abuts against the slide bar (101).

5. A convenient stop valve seat centering grinding device according to claim 2, characterized in that: The grinding assembly comprises a grinding rod (200) penetrating a bearing (103), a grinding disc (202) is rotatably arranged at the bottom of the grinding rod (200), and adhesive-backed sandpaper (203) is bonded to the bottom end of the grinding disc (202).

6. A convenient stop valve seat centering grinding device according to claim 5, characterized in that: A handle (201) is also screwed onto the top of the grinding rod (200), and the handle (201) and the grinding rod (200) are perpendicular to each other.

7. A convenient stop valve seat centering grinding device according to claim 3, characterized in that: At least three sliding bars (101) are provided, and the diameter of the sliding bars (101) is equal to the inner diameter of the clamping slot (102a).

8. A convenient stop valve seat centering grinding device according to claim 5, characterized in that: The outer ring portion of the bearing (103) is fixed to the inner wall of the positioning sleeve (100), while the inner ring portion is in contact with the grinding rod (200).

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