Single-seat control valve core and seat grinding auxiliary device

Abstract

This utility model discloses an auxiliary device for grinding the valve core and seat of a single-seat regulating valve, relating to the field of valve technology. Its main purpose is to improve the concentricity of the valve core and seat during grinding. The main technical solution of this utility model is: an auxiliary device for grinding the valve core and seat of a single-seat regulating valve, comprising: a cylinder and a fixing clamp; opposite sidewalls of the cylinder in the first diameter direction are respectively fixedly connected to ear plates, and the ear plates are provided with waist holes; the central axis of the fixing clamp coincides with the central axis of the cylinder, for allowing the valve stem to pass through the fixing clamp.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to an auxiliary device for grinding the valve core and valve seat of a single-seat regulating valve. Background Technology

[0002] Sealing rating is a crucial criterion for evaluating the reliability of a control valve. For single-seat control valves that experience internal leakage due to erosion and wear of the valve core and seat sealing surfaces, grinding the valve core and seat to improve their fit is a critical and challenging maintenance step. Purchasing new valve cores and seats or specialized grinding equipment is expensive. To save costs, manual grinding is undoubtedly the most cost-effective maintenance method.

[0003] However, the following problems exist in the maintenance of control valves:

[0004] (1) It is impossible to guarantee the concentricity of the valve core and valve seat during grinding;

[0005] (2) Low work efficiency and inability to guarantee repair quality;

[0006] (3) The valve core and valve seat sealing surfaces have a low fit, resulting in a low success rate and requiring repeated grinding processes.

[0007] Therefore, it is necessary to develop auxiliary equipment for grinding the valve core and seat of single-seat control valves to improve the concentricity of the valve core and seat during grinding, so as to ensure the maintenance quality of single-seat control valves. Utility Model Content

[0008] In view of this, this utility model embodiment provides an auxiliary device for grinding the valve core and valve seat of a single-seat regulating valve, the main purpose of which is to improve the concentricity of the valve core and valve seat during grinding.

[0009] To achieve the above objectives, this utility model mainly provides the following technical solutions:

[0010] This utility model embodiment provides a grinding auxiliary device for a single-seat regulating valve core and valve seat, the device comprising: a cylinder and a fixing clamp;

[0011] The opposite sidewalls of the cylinder in the first diameter direction are respectively fixedly connected to the ear plate, and the ear plate is provided with waist holes;

[0012] The central axis of the fixing clamp coincides with the central axis of the cylinder, and is used to allow the valve stem to pass through the fixing clamp.

[0013] The purpose of this utility model and the technical problems to be solved can be further achieved by the following technical measures.

[0014] Optionally, it also includes an adjustable clamping mechanism, which includes a first clamping rod and a second clamping rod. The first clamping rod and the second clamping rod are detachably connected to the opposite sidewalls in the second diameter direction of the cylinder. The corresponding ends of the first clamping rod and the second clamping rod are respectively provided with V-shaped grooves, and the two V-shaped grooves constitute the fixing fixture.

[0015] Optionally, a first through hole is provided on one side wall of the cylinder in the second diameter direction, and a second through hole is provided on the other side wall of the cylinder in the second diameter direction. The first clamping rod is installed in the first through hole through a gland joint, and the second clamping rod is installed in the second through hole through a gland joint.

[0016] Optionally, the two gland connectors pass through the first through hole and the second through hole respectively, and are secured with nuts.

[0017] Optionally, the V-angle of the V-groove is 60° to 90°.

[0018] By employing the above technical solution, this utility model has at least the following advantages:

[0019] When using this device, the center of the cylinder is aligned with the center of the opening at the top of the valve body. The bolts at the diagonal positions of the upper end face of the valve body are retained. The two lugs extend along the diagonal direction of the upper end face of the valve body. For each lug, two screws pass through the waist hole of the lug. The two screws pass through the mounting holes of the fixing plate from the radial opposite sides of the bolts on the upper end face of the valve body and are connected to the nuts. This clamps the bolts on the upper end face of the valve body between the lugs and the fixing plate, thereby fixing the relative position of the cylinder and the valve body. In this way, the relative position of the fixing fixture and the valve body is also fixed, thus limiting the valve stem to the center position of the valve body.

[0020] Based on this, the maintenance personnel connect the upper end of the valve stem to the output end of the handheld power tool. When the handheld power tool is started, it drives the valve stem to rotate within the range of the fixed clamp, preventing the valve stem from rotating eccentrically relative to the valve body, thus ensuring the concentricity of the valve core and valve seat during grinding. Attached Figure Description

[0021] Figure 1 A side view of the usage state of a single-seat regulating valve core and seat grinding auxiliary device provided in this embodiment of the utility model;

[0022] Figure 2 A top view of the usage state of another single-seat regulating valve core and valve seat grinding auxiliary device provided in this embodiment of the utility model;

[0023] Figure 3 A top view of the usage state of a single-seat regulating valve core and valve seat grinding auxiliary device provided in this embodiment of the utility model.

[0024] The reference numerals in the accompanying drawings include: cylinder 1, ear plate 2, waist hole 3, valve stem 4, upper end face bolt of valve body 5, screw 6, fixing plate 7, round tube component 8, support rod 9, round recess 10, first clamping rod 11, second clamping rod 12, V-groove 13, gland connector 14. Detailed Implementation

[0025] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "embodiments" or "embodiments" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0027] like Figure 1 and Figure 3 As shown, an embodiment of this utility model provides a grinding auxiliary device for a single-seat regulating valve core and valve seat, which includes: a cylinder 1 and a fixing clamp;

[0028] The opposite sidewalls of the cylinder 1 in the first diameter direction are respectively fixedly connected to the ear plate 2, and the ear plate 2 is provided with waist hole 3;

[0029] The central axis of the fixing clamp coincides with the central axis of the cylinder 1, and is used to allow the valve stem 4 to pass through the fixing clamp.

[0030] The working process of the auxiliary device for grinding the valve core and seat of a single-seat control valve is as follows:

[0031] When using this device, the center of the cylinder 1 is aligned with the center of the opening at the top of the valve body. The bolts at the diagonal positions of the upper end face of the valve body are retained. The two ear plates 2 extend along the diagonal direction of the upper end face of the valve body. For each ear plate 2, two screws 6 are used to pass through the waist hole 3 of the ear plate 2. The two screws 6 pass through the mounting holes of the fixing plate 7 from the radial opposite sides of the bolt 5 on the upper end face of the valve body and are connected to the nut. This clamps the bolt 5 on the upper end face of the valve body between the ear plate 2 and the fixing plate 7, thereby fixing the relative position of the cylinder 1 and the valve body (the fixing cylinder 1 is placed in the circular recess 10 on the upper end face of the valve body to ensure that the cylinder 1 and the valve body are concentric). In this way, the relative position of the fixing fixture and the valve body is fixed, thereby limiting the valve stem 4 to the center position of the valve body.

[0032] Based on this, the maintenance personnel connect the upper end of the valve stem 4 to the output end of the handheld power tool. This way, when the handheld power tool is started, the valve stem 4 is rotated within the range of the fixed fixture, preventing the valve stem 4 from rotating eccentrically relative to the valve body, thereby ensuring the concentricity of the valve core and valve seat during grinding.

[0033] Specifically, in a single-seat control valve, the valve stem 4 and the valve core are coaxially and fixedly connected.

[0034] like Figure 2 As shown, specifically, the fixing fixture can be a circular tube component 8 with a fixed diameter. The central axis of the circular tube component 8 coincides with the central axis of the cylinder 1. The outer wall of the circular tube component 8 is fixedly connected to the inner wall of the cylinder 1 through the support rod 9. The diameter of the circular tube component 8 is slightly larger than the diameter of the valve stem 4, which makes it easier for the fixing fixture to limit the swing range of the valve stem 4 when it rotates, and to ensure the concentricity of the valve core and valve seat grinding.

[0035] like Figure 1 and Figure 3 As shown in the specific embodiment, as another embodiment of the fixed clamp, it also includes an adjustable clamping mechanism. The adjustable clamping mechanism includes a first clamping rod 11 and a second clamping rod 12. The first clamping rod 11 and the second clamping rod 12 are respectively detachably connected to the opposite sidewalls in the second diameter direction of the cylinder 1. The corresponding ends of the first clamping rod 11 and the second clamping rod 12 are respectively provided with V-shaped grooves 13. The two V-shaped grooves 13 constitute the fixed clamp.

[0036] In this embodiment, specifically, by adjusting the end spacing of the first clamping rod 11 and the second clamping rod 12, the relative distance of the two V-grooves 13 is adjusted, so that the inner edge size of the fixing fixture is adapted to the radial diameter of the valve stem 4.

[0037] Specifically, the fixing fixture of this embodiment can adjust the inner edge size, thereby adapting to valve stems 4 of different diameters.

[0038] like Figure 1 and Figure 3 As shown, in a specific embodiment, a first through hole is provided on one side wall of the cylinder 1 in the second diameter direction, and a second through hole is provided on the other side wall of the cylinder 1 in the second diameter direction. The first clamping rod 11 is installed in the first through hole through a gland connector 14, and the second clamping rod 12 is installed in the second through hole through a gland connector 14.

[0039] In this embodiment, specifically, through the fastening action of the gland connector 14, the first clamping rod 11 and the second clamping rod 12 will not produce axial displacement or radial rotation; wherein, the absence of radial rotation ensures that the plane containing the V-angle of the V-groove 13 is always perpendicular to the axial direction of the valve stem 4; the absence of axial displacement prevents the fixing clamp from being eccentric relative to the valve body.

[0040] like Figure 3 As shown, in a specific embodiment, the two gland connectors 14 pass through the first through hole and the second through hole respectively, and are fixed with nuts.

[0041] In this embodiment, specifically, the connector body of the gland connector 14 is provided with external threads. After the connector body of the gland connector 14 passes through the first through hole or the second through hole, the part of the connector body of the gland connector 14 located inside the cylinder 1 is connected to a lock nut to fix the connector body of the gland connector 14 to the side wall of the cylinder 1 where the first through hole and the second through hole are located. On this basis, the first clamping rod 11 and the second clamping rod 12 pass through the connector body of the gland connector 14 respectively, and the sealing ring and the clamping claw are squeezed by the sealing nut to fix the first clamping rod 11 and the second clamping rod 12.

[0042] The above method allows for the individual replacement of the gland connector 14, the first clamp 11, and the second clamp 12, reducing maintenance costs.

[0043] like Figure 3 As shown, in a specific embodiment, the V-angle of the V-groove 13 is 60° to 90°.

[0044] In this embodiment, specifically, two V-shaped grooves 13 with a V-angle of 60° to 90° are used to form a fixing fixture corresponding to each other. The inner edge of the fixing fixture is quadrilateral, which is close to a regular quadrilateral. This allows the diameter of the inscribed circle to be as large as possible, that is, the diameter of the valve stem 4 to be as large as possible.

[0045] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A grinding auxiliary device for the valve core and seat of a single-seat regulating valve, characterized in that, include: A cylinder, wherein opposite sidewalls of the cylinder in the first diameter direction are respectively fixedly connected to ear plates, and the ear plates are provided with waist holes; A fixing clamp, the central axis of which coincides with the central axis of the cylinder, is used to allow the valve stem to pass through the fixing clamp.

2. The auxiliary device for grinding the valve core and seat of a single-seat regulating valve according to claim 1, characterized in that, It also includes an adjustable clamping mechanism, which includes a first clamping rod and a second clamping rod. The first clamping rod and the second clamping rod are detachably connected to the opposite sidewalls in the second diameter direction of the cylinder. The corresponding ends of the first clamping rod and the second clamping rod are respectively provided with V-shaped grooves, and the two V-shaped grooves constitute the fixing fixture.

3. The auxiliary device for grinding the valve core and seat of a single-seat regulating valve according to claim 2, characterized in that, The cylinder has a first through hole on one side wall in the second diameter direction and a second through hole on the other side wall in the second diameter direction. The first clamping rod is installed in the first through hole through a gland joint, and the second clamping rod is installed in the second through hole through a gland joint.

4. The auxiliary device for grinding the valve core and seat of a single-seat regulating valve according to claim 3, characterized in that, The two gland connectors pass through the first through hole and the second through hole respectively, and are secured with nuts.

5. The auxiliary device for grinding the valve core and seat of a single-seat regulating valve according to claim 2, characterized in that, The V-angle of the V-groove is 60° to 90°.

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