A grinding and repairing tool for sealing surface of a stop valve

Abstract

The utility model relates to valve technical field discloses a kind of stop valve sealing surface grinding repair tool, including constraint part, valve stem and driving part, wherein, constraint part is installed to the recess in valve cover by fastener;Valve stem is rotatably worn in constraint part, and one end of valve stem in valve body is connected valve plug;Driving part is drivingly connected with one end of valve stem outside valve body, to drive valve stem rotation;The stop valve sealing surface grinding repair tool of the utility model is under the constraint of constraint part, and driving valve stem rotates around its own axis, to drive valve plug to grind and repair the sealing surface of valve seat, so that valve plug can be adapted to seal with valve seat;Wherein, constraint part can be selected from discarded seal or separately process, and valve plug and valve stem material selection can come from discarded valve plug and valve stem, and it is convenient to take material, low in cost and can realize the efficient grinding repair of valve seat sealing surface.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and more specifically, to a tooling for grinding and repairing the sealing surface of a gate valve. Background Technology

[0002] Refer to the instruction manual appendix Figure 1 In a type of gate valve in the prior art, one end of the valve stem is equipped with a rotary wheel, and the other end of the valve stem passes through the valve body and connects to the valve plug. By rotating the rotary wheel, the valve stem can be rotated forward or backward on the valve body, causing the valve plug to contact or disengage from the valve seat in the valve body, thereby realizing the flow or cut-off of the medium in the valve body. However, the contact surface between the valve stem and the valve cover is prone to sealing failure due to medium pressure and wear. Therefore, a set of recesses is generally set in the center of the valve cover, and a set of sealing blocks is detachably installed in the recesses by fasteners. The sealing blocks provide a static seal with the valve seat, while the valve stem is rotatably inserted into the sealing blocks, providing a dynamic seal with the valve stem and the sealing blocks. When the seal between the sealing blocks and the valve stem fails, only the sealing blocks need to be replaced. Compared to replacing the entire valve cover, replacing the sealing blocks significantly reduces replacement and usage costs.

[0003] However, after prolonged use, the sealing surface of the valve seat of this type of gate valve is easily damaged due to fluid erosion and pressure, resulting in sealing failure. At this time, it is necessary to use equipment to grind and repair the sealing surface of the valve seat. There is a special tooling for repairing the sealing surface of the valve seat in the relevant existing technology, but the parts of such tooling structure all need to be newly designed and processed, resulting in high production and use costs. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings mentioned in the background art and provide a tooling for grinding and repairing the sealing surface of a gate valve that is easy to obtain materials and highly efficient.

[0005] The technical solution of this utility model to solve the above-mentioned technical problems is as follows: A tooling for grinding and repairing the sealing surface of a gate valve, comprising: A restraint element having the same outer contour as the seal element, so that it can be mounted into a cavity on the valve cover by fasteners; A valve stem, rotatably passing through a constraint, with one end of the valve stem located within the valve body connected to a valve plug; and A drive component is connected to one end of the valve stem located outside the valve body to drive the valve stem to rotate.

[0006] In the gate valve sealing surface grinding and repair fixture of this utility model, one end of the valve stem is connected to the driving component, and the other end of the valve stem is connected to the valve plug; the constraint component can be installed in the cavity of the valve cover itself by fasteners. Under the constraint of the constraint component, the valve stem is driven to rotate around its own axis, thereby driving the valve plug to grind and repair the sealing surface of the valve seat so that the valve plug can be adapted to seal with the valve seat.

[0007] Among them, the restraint parts can be made from discarded seals or processed separately, and the valve plugs and valve stems can be made from discarded valve plugs and valve stems. The materials are easy to obtain, the cost is low, and the valve seat sealing surface can be efficiently ground and repaired.

[0008] Furthermore, the constraint component includes a housing and several bearings installed inside the housing. The bearings are sleeved on the valve stem, and under the drive of the drive component, the valve stem can rotate at high speed in a more stable state.

[0009] Furthermore, several annular grooves for installing bearings are provided on the inner wall of the housing, making it difficult for the bearings to fall off.

[0010] Furthermore, the constraint includes a constraint body, the lower end of which is adapted to the contour of the cavity; the upper end of the constraint is provided with two sets of connecting ears, which are used to connect to the valve cover by fasteners, so as to facilitate the fixing of the constraint.

[0011] Furthermore, the fasteners include screws, and each set of connecting lugs has a through hole for inserting the screw, which can utilize the existing screws and nuts on the valve cover to fix the constraint.

[0012] Furthermore, the housing is divided into two equal sets of half blocks by a set of planes, wherein the axis of the bearing is located on the plane, and each set of annular grooves is equally divided and arranged on the two sets of half blocks, which facilitates the assembly and disassembly of the bearing and the housing.

[0013] Furthermore, each of the two sets of half-pieces has a set of connecting ears.

[0014] Furthermore, the two halves are connected by magnetic attraction, allowing the housing to be easily opened or closed for the installation or removal of the bearing.

[0015] Furthermore, the valve stem has a mounting part for mounting a rotating wheel, and the driving component includes an electric drill. The output end of the electric drill is provided with a sleeve, which is fitted onto the mounting part. The mounting part of the valve stem itself is used as the driving joint for rotating the valve stem, eliminating the need to separately machine a driving joint on the valve stem.

[0016] Furthermore, on any cross section perpendicular to the valve stem axis, the orthographic projection of the mounting part on the cross section is quadrilateral, and the sleeve is an inner four-corner sleeve adapted to the mounting part, which is convenient to obtain materials and reduces the cost of use. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a shut-off valve in the prior art; Figure 2 The usage state of the grinding and repair tooling provided in the embodiments of this utility model Figure 1 ; Figure 3 The usage state of the grinding and repair tooling provided in the embodiments of this utility model Figure 2 ; Figure 4 A perspective view of the constraint member provided in an embodiment of this utility model; Figure 5 A schematic diagram of the structure of a half-block provided in an embodiment of this utility model; Figure 6 A schematic diagram illustrating the assembly relationship between the half-piece and the bearing provided for an embodiment of this utility model; The attached diagram lists the components represented by each number as follows: 10-Valve body, 100-Valve seat, 11-Valve cover, 110-Sealing block, 111-Fastener, 112-Cavity, 12-Valve plug, 13-Roller, 14-Valve stem, 140-Mounting part, 20-Constraint, 200-Half block, 2000-Annular groove, 201-Bearing, 202-Connecting lug, 2020-Through hole. Detailed Implementation

[0018] The principles and features of this utility model are described below. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0019] Reference Figures 2 to 6 This utility model discloses a tooling for grinding and repairing the sealing surface of a stop valve, which includes a constraint member 20, a valve stem 14 and a driving member (not shown).

[0020] The constraint member 20 has the same outline as the sealing block 110 on the valve cover 11. The constraint member 20 can be fixed to the cavity 112 on the valve cover 11 by the fastener 111 provided on the valve cover 11 itself. The valve stem 14 is rotatably inserted in the constraint member 20. One end of the valve stem 14 located inside the valve body 10 is connected to the valve plug 12. The driving member is driven to the end of the valve stem 14 located outside the valve body 10 to drive the valve stem 14 to rotate.

[0021] In the gate valve sealing surface grinding and repair fixture of this utility model, one end of the valve stem 14 is connected to the driving component. Under the constraint of the constraint component 20, the driving component can drive the valve stem 14 to rotate stably and at high speed around its own axis, thereby driving the valve plug 12 at the end of the valve stem 14 to grind and repair the sealing surface of the valve seat 100. That is, most of the parts of the gate valve sealing surface grinding and repair fixture come from the parts of the gate valve itself.

[0022] Among them, based on cost considerations, the valve plug 12 and valve stem 14 can be made from discarded valve plugs and valve stems, and the constraint 20 can be made from discarded sealing parts. The materials are readily available, inexpensive, and can achieve efficient grinding and repair of the sealing surface of the valve seat 100.

[0023] For the drive component, it only needs to be able to drive the valve stem 14 to rotate around its own axis. Therefore, the drive component can be a motor structure driven by electric or pneumatic means. The motor structure needs to be equipped with a connecting component that can be adapted to the valve stem 14 and can drive it stably. For example, the connecting component can be a sleeve or a coupling.

[0024] In addition, refer to Figure 1 and Figure 2 Since the valve stem 14 itself has a mounting part 140 for mounting the rotating wheel 13, the driving component can be an electric drill. The output end of the electric drill is provided with a sleeve, which is fitted onto the mounting part 140. The mounting part 140 itself of the valve stem 14 is used as the driving joint for the rotation of the valve stem 14. Therefore, it is not necessary to separately process the driving joint on the valve stem 14.

[0025] For example, for Figure 1 The mounting portion 140 of the valve stem 14 has a quadrilateral profile on any cross section perpendicular to the axial direction of the valve stem 14. Therefore, the sleeve is an inner four-corner sleeve that fits the mounting portion 140, which is easy to obtain and reduces the cost of use.

[0026] In addition, refer to Figure 1 The valve stem 14 of the shut-off valve also has a threaded portion at its upper end, which is used to install a nut to lock the rotary wheel 13. Therefore, the threaded portion of the valve stem 14 can be cut off during use, so as not to interfere with the installation of the sleeve. Alternatively, if the diameter of the inscribed circle of the quadrilateral of the orthographic projection of the aforementioned mounting portion 140 is not less than the outer diameter of the threaded portion, it is only necessary to select a sleeve with a certain inner cavity depth to pass over the threaded portion to connect the mounting portion 140, so that the threaded portion does not need to be cut off.

[0027] In practice, when the constraint member 20 uses a discarded seal and the valve stem 14 uses a discarded valve stem, due to the excessive wear gap between the discarded seal and the discarded valve stem, the seal may not be able to effectively constrain the valve stem 14 during the grinding and repair process. This can cause the valve stem 14 to swing and deviate during high-speed rotation, thereby damaging the sealing surface of the valve seat 100 during the grinding process. To avoid this situation, the constraint member 20 in this embodiment is machined independently, and the constraint member 20 has the same outer contour as the seal, so as to ensure that the constraint member 20 can be installed into the cavity 112 by the fastener 111 on the valve cover 11.

[0028] Reference Figure 3 and Figure 4The constraint member 20 includes a constraint member body, the lower end of which is adapted to the contour of the cavity 112, and the upper end of the constraint member body is provided with two sets of connecting ears 202. The two sets of connecting ears 202 are used to connect to the valve cover 11 through fasteners 111 to fix the constraint member 20 to the valve cover 11.

[0029] It is easy to understand that, depending on the structure of the fastener 111 on the valve cover 11, the connection method between the connecting ear 202 and the fastener 111 also varies. For example, when the fastener 111 uses a rivet or a locking pin, the connecting ear 202 needs to have a corresponding rivet hole or a notch for the locking pin; for example, refer to Figure 2 In this embodiment, the fastener 111 is a bolt. Therefore, each set of connecting ears 202 is provided with a through hole 2020 for threading a screw, so that the screw and nut in the existing bolt on the valve cover 11 can be used to fix the constraint member 20.

[0030] Reference Figure 4 The constraint member 20 includes a housing and a plurality of bearings 201 installed in the housing.

[0031] Reference Figure 3 In use, several bearings 201 are sleeved on the valve stem 14. Under the drive of the drive component, the valve stem 14 can rotate at high speed in a more stable state, and the wear between the constraint component 20 and the valve stem 14 can be reduced.

[0032] Reference Figure 5 and Figure 6 The inner wall of the housing is provided with several annular grooves 2000 for installing bearings 201, so that the bearings 201 are not easy to fall off. In this embodiment, the housing has three sets of annular grooves 2000, and each set of annular grooves 2000 can be used to embed a set of bearings 201.

[0033] Reference Figure 4 and Figure 6 In this embodiment, the housing is divided into two equal sets of half blocks 200 by a set of planes. The axis of the bearing 201 is located on the plane. Therefore, each set of annular grooves 2000 is equally divided and arranged on the two sets of half blocks 200, which facilitates the assembly and disassembly of the bearing 201 from the housing.

[0034] When the housing is made of injection molded parts, two sets of half blocks 200 can be injection molded first, and then the bearing 201 can be installed on the housing. The two sets of half blocks 200 of the housing can be molded into a whole by welding or bonding.

[0035] Alternatively, the housing can be made of injection molded parts or metal parts, and the two sets of half blocks 200 do not need to be molded into a single structure. In use, the shape of the cavity 112 can be used to constrain the two sets of half blocks 200, so that the two sets of half blocks 200 can be stably installed in the cavity 112 in a snap-fit ​​state.

[0036] Reference Figures 4 to 6 When the housing is composed of two sets of half pieces 200, each set of half pieces 200 has a set of connecting ears 202.

[0037] When the two sets of half blocks 200 are a split structure, they can be connected by magnetic adsorption, which allows the housing to be opened or closed easily for the installation or removal of the bearing 201. When the half block 200 is a metal part, it can be a magnetized magnetic steel structure. When the half block 200 is an injection molded part, magnetic components can be embedded on the contact surfaces of the two sets of half blocks 200.

[0038] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0041] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0042] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A tooling for grinding and repairing the sealing surface of a stop valve, characterized in that, include: A restraint element having the same outer contour as the seal element, so that it can be mounted into a cavity on the valve cover by fasteners; A valve stem, which is rotatably inserted within the constraint, is connected to a valve plug at one end of the valve stem located within the valve body; as well as A driving component is driven to the end of the valve stem located outside the valve body to drive the valve stem to rotate.

2. The tooling for grinding and repairing the sealing surface of a gate valve according to claim 1, characterized in that, The constraint member includes a housing and a plurality of bearings installed within the housing, the plurality of bearings being sleeved on the valve stem.

3. The tooling for grinding and repairing the sealing surface of a gate valve according to claim 2, characterized in that, The inner wall of the housing has several annular grooves for installing the bearing.

4. The tooling for grinding and repairing the sealing surface of a gate valve according to claim 3, characterized in that, The constraint member includes a constraint member body, the lower end of which is adapted to the contour of the cavity; the upper end of the constraint member is provided with two sets of connecting ears, which are used to connect to the valve cover through the fasteners.

5. The tooling for grinding and repairing the sealing surface of a stop valve according to claim 4, characterized in that, The fastener includes a screw, and each set of connecting lugs has a through hole for the screw to pass through.

6. The tooling for grinding and repairing the sealing surface of a gate valve according to claim 5, characterized in that, The housing is divided into two equal sets of half blocks by a set of planes, wherein the axis of the bearing is located on the planes, and each set of annular grooves is equally divided and arranged on the two sets of half blocks.

7. The tooling for grinding and repairing the sealing surface of a gate valve according to claim 6, characterized in that... Each of the two sets of half-blocks has a set of the connecting ears.

8. The tooling for grinding and repairing the sealing surface of a gate valve according to claim 6, characterized in that... The two sets of half blocks are connected by magnetic adsorption.

9. The tooling for grinding and repairing the sealing surface of a gate valve according to claim 1, characterized in that, The valve stem has a mounting portion for mounting a rotating wheel, and the driving component includes an electric drill. The output end of the electric drill is provided with a sleeve, which is fitted onto the mounting portion.

10. The tooling for grinding and repairing the sealing surface of a stop valve according to claim 9, characterized in that, On any cross section perpendicular to the valve stem axis, the orthographic projection of the mounting part on the cross section is quadrilateral, and the sleeve is an inner four-corner sleeve adapted to the mounting part.

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