Protection device for rising stem valve

Abstract

The utility model provides a protective device for a rising stem valve. The protective device comprises a protective sleeve used for being connected with the rising stem valve, a through hole formed in the top end of the protective sleeve, a connecting rod extending through the through hole and penetrating into the protective sleeve, and a first cover plate arranged at the bottom end of the connecting rod and used for being connected with a valve rod in an abutting mode.

Description

Technical Field

[0001] The utility model relates to the technical field of valve parts and components, in particular to a protective device for a rising stem valve. Background Art

[0002] At present, the oil and gas fields located in the Taklimakan Desert have a lot of dust in the desert area, so valves are the most commonly used in oil and gas production and gathering and transportation. For many rising-stem valves, the valve stem is exposed. Since the valve is opened and closed by rotating the thread of the valve stem to realize the opening and closing of the gate, it is necessary to ensure that the valve stem always has sufficient grease. However, once the dust in the desert comes into contact with the grease, the grease will contain tiny granular dust. Once it enters the packing, it will cause the valve to leak. At the same time, the valve stem contaminated by dust makes the valve very difficult to open and close, or even unable to open and close, seriously affecting the integrity of the valve.

[0003] Therefore, it is desired in the art to provide a protective device for a rising stem valve to solve the above technical problems. Utility Model Content

[0004] The purpose of the utility model is to provide a protective device for a rising stem valve, which can effectively prevent sand from affecting the valve stem of the rising stem valve in a desert environment. Preferably, the utility model can connect the sleeve to the valve and cover it outside the valve stem to effectively prevent sand, thereby preventing the grease at the valve stem from being contaminated by sand and dust, thereby damaging the valve packing seal and causing leakage, further ensuring the flexibility and integrity of the valve stem during use, and clearly displaying the switch status and opening of the valve.

[0005] According to the utility model, a protective device for a rising stem valve is provided, comprising a sleeve for connecting to the rising stem valve, a through hole formed at the top end of the sleeve, a connecting rod extending through the through hole and penetrating into the sleeve, and a first cover plate arranged at the bottom end of the connecting rod and used to abut against the valve stem.

[0006] In one embodiment, a second cover plate for abutting against the sheath is provided at the top end of the connecting rod.

[0007] When the rising stem valve is in a fully open state, the first cover plate moves upward and abuts against the sleeve under the pushing action of the valve stem; when the rising stem valve is in a fully closed state, the second cover plate moves downward and abuts against the sleeve under the action of gravity.

[0008] In one embodiment, an indication area is provided on the outer wall of the connecting rod, and the indication area is marked in green.

[0009] In one embodiment, at least two scale lines for displaying the valve opening are provided on the indication area.

[0010] In one embodiment, the connecting rod consists of two threadedly connected connecting rod segments.

[0011] In one embodiment, the jacket includes a body configured as a cylindrical structure, and a flange extending radially outward from an outer wall of the body.

[0012] In one embodiment, a plurality of bolt holes arranged at intervals and adapted to match the rising stem valve are provided along the circumference of the flange.

[0013] In one embodiment, an internal threaded hole for fixed connection with the rising stem valve is provided on the inner wall of the body.

[0014] In one embodiment, a sand-proof layer for abutting against the sheath is provided at the top end of the first cover plate and the bottom end of the second cover plate, and the sand-proof layer is made of rubber.

[0015] In one embodiment, the first cover plate and the second cover plate are both welded to the ends of the connecting rod.

[0016] Compared with the prior art, the advantages of the utility model are:

[0017] The utility model can effectively prevent sand from falling on the valve stem of the rising stem valve in the desert environment. Preferably, the utility model can fix the sheath to the rising stem valve and set the cover outside the valve stem to effectively prevent sand, thereby avoiding the problem of sand and dust contaminating the grease at the valve stem and damaging the valve packing seal to cause leakage, so as to further ensure the flexibility and integrity of the valve stem during use. In addition, the utility model can also judge the open and closed state of the rising stem valve and the opening of the rising stem valve in real time through the indication area or scale line, so as to facilitate subsequent construction operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be described in detail below in conjunction with the accompanying drawings, in which:

[0019] Figure 1 The internal structure of the protective device for a rising stem valve according to the utility model is schematically shown;

[0020] Figure 2 It is a top view of the protective device for a rising stem valve according to the utility model.

[0021] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0022] In order to make the technical solutions and advantages of the present invention more clearly understood, the exemplary embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than an exhaustive list of all embodiments. In addition, the embodiments of the present invention and the features in the embodiments can be combined with each other if there is no conflict.

[0023] The utility model will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 The internal structure of the protection device 100 for a rising stem valve according to the utility model is schematically shown;

[0025] Figure 2 FIG. 1 is a top view of a protective device 100 for a rising stem valve according to the utility model.

[0026] like Figure 1 As shown, the protective device 100 for a rising stem valve according to the utility model mainly includes a sheath 10. Preferably, the sheath 10 is used to form a fixed connection with a rising stem valve (not shown in the drawings, and is the same device as the valve hereinafter), so that it can be covered outside the valve stem (not shown in the drawings) to effectively prevent sand from forming on the valve stem, and its content is introduced hereinafter.

[0027] In one embodiment, Figure 1 As shown, a through hole 101 is formed at the top of the sleeve 10. In addition, the protective device 100 for a rising stem valve further includes a connecting rod 20 extending through the through hole 101 and penetrating into the sleeve 10. Preferably, a first cover plate 21 and a second cover plate 22 are respectively provided at both ends of the connecting rod 20, so as to limit the movement path of the connecting rod 20 in the axial direction.

[0028] In one embodiment of the present invention, the first cover plate 21 is fixed at the bottom end of the connecting rod 20 and is in the sheath 10. Preferably, the first cover plate 21 is always in axial contact with the valve stem and can move with the valve stem, so that the opening and closing state and opening degree of the valve can be more easily displayed, which is described below.

[0029] In addition, the first cover plate 21 can also abut against the sheath 10 axially, thereby effectively limiting the maximum moving distance of the connecting rod 20 when moving upward.

[0030] In one embodiment of the present invention, the second cover plate 22 is fixed at the top end of the connecting rod 20 and outside the sheath 10. Preferably, the second cover plate 22 can abut against the sheath 10 axially, thereby effectively limiting the maximum movement distance of the connecting rod 20 when it moves downward.

[0031] According to one embodiment of the utility model, during the opening process of the rising stem valve, the first cover plate 21 can move upward under the push of the valve stem until it axially abuts against the sleeve 10, and the valve is in a fully open state at this time; during the closing process of the rising stem valve, the second cover plate 22 can move downward under the action of its own gravity until it axially abuts against the sleeve 10, and the valve is in a fully closed state at this time.

[0032] In one embodiment, an indication area is provided on the outer wall of the connecting rod 20. Preferably, the indication area is usually marked with green. Therefore, the open or closed state of the valve can be determined by identifying whether the indication area is green.

[0033] In the present invention, when the valve is fully open, the exposed green connecting rod 20 can be clearly seen, indicating that the valve is open; when the valve is fully closed, the green area (indicating area) on the connecting rod 20 cannot be seen, indicating that the valve is fully closed.

[0034] In one embodiment, at least two scale lines for displaying the valve opening are provided on the indication area. Preferably, the valve opening can be judged more clearly and accurately through the scale lines, thereby facilitating subsequent construction operations.

[0035] In the present invention, for example, two scale segments are set, that is, the length of the connecting rod 20 when the valve is fully open (i.e., the indication area) is equally divided into two intervals, and marked with 0%, 50% and 100% respectively. Therefore, the opening of the valve at this time can be intuitively displayed by observing the data of the scale segments.

[0036] In the present invention, for example, five scale segments are set, that is, the length of the connecting rod 20 when the valve is fully open (i.e., the indication area) is equally divided into 5 intervals, and marked with 0%, 20%, 40%, 60%, 80% and 100% respectively. Therefore, the opening of the valve at this time can be intuitively displayed by observing the data of the scale segments.

[0037] Preferably, the first cover plate 21 and the second cover plate 22 are both welded to the ends of the connecting rod 20, and the connecting rod 20, the first cover plate 21 and the second cover plate 22 are constructed as an integrated structure, so that they can move synchronously when the rising stem valve is opened and closed, so as to improve the accuracy of displaying the opening and closing state and opening degree of the valve.

[0038] In one embodiment, the connecting rod 20 is composed of two interconnected connecting rod segments. Preferably, the connecting rod segments are configured as equal-diameter rods, and the two connecting rod segments are threadedly connected. In this way, it is not only helpful for installation and disassembly and cleaning, but also possible to further clean sand after sand is accumulated at the through hole 101 by disassembling the connecting rod segments.

[0039] According to the utility model, if Figure 1 and2 As shown, the sleeve 10 includes a body 11 configured as a cylindrical structure, and a flange 12 extending radially outward from the outer wall of the body 11. Preferably, a plurality of bolt holes 121 arranged at intervals and adapted to a rising stem valve are provided along the circumference of the flange 12.

[0040] In the utility model, for the rising stem valves that do not have an external threaded short section at the handwheel at the factory, the utility model can smoothly fix the sleeve 10 on the rising stem valve by means of a clamp or a rivet through the bolt hole 121, thereby improving the adaptability of the protection device 100 for the rising stem valve.

[0041] In one embodiment, Figure 1 As shown, an internal threaded hole 13 for fixed connection with the rising stem valve is provided on the inner wall of the body 11. Preferably, for the rising stem valve with an external threaded nipple at the hand wheel, the utility model can directly form a threaded connection with the rising stem valve through the internal threaded hole 13 to ensure the firmness between the protective device 100 for the rising stem valve and the rising stem valve.

[0042] In the present invention, the size of the internal threaded hole 13 can be processed according to the size of the external thread of the valve handwheel to further ensure the matching degree between the protective device 100 for rising stem valves and the valve, thereby improving the anti-sand effect of the protective device 100 for rising stem valves.

[0043] In one embodiment of the present invention, a sand-proof layer is provided on both the first cover plate 21 and the second cover plate 22. Preferably, the sand-proof layer is made of rubber. In the present invention, the sand-proof layer is flatly fixed at the top end of the first cover plate 21 and the bottom end of the second cover plate 22, respectively, so that it can be more easily abutted against the sheath 10 axially.

[0044] In the present invention, sand in a desert environment may enter the sleeve 10 from the tiny gap between the through hole 101 of the sleeve 10 and the connecting rod 20 to affect the use of the valve stem. The present invention has a fixed and flat sand-proof layer, so when the valve is fully opened or fully closed, the sand-proof layer is squeezed by the sleeve 10 and the first cover plate 21 and the second cover plate 22, thereby achieving sealing to further prevent sand erosion.

[0045] In the present invention, the valve is usually in only two states: a fully closed state or a fully open state.

[0046] Compared with the prior art, the advantages of the present invention are:

[0047] The utility model can effectively prevent sand from falling on the valve stem of the rising stem valve in the desert environment. Preferably, the utility model can fix the sheath to the rising stem valve and set the cover outside the valve stem to effectively prevent sand, thereby avoiding the problem of sand and dust contaminating the grease at the valve stem and damaging the valve packing seal to cause leakage, so as to further ensure the flexibility and integrity of the valve stem during use. In addition, the utility model can also judge the open and closed state of the rising stem valve and the opening of the rising stem valve in real time through the indication area or scale line, so as to facilitate subsequent construction operations.

[0048] In the description of the present utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0049] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements.

[0050] For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0051] The above are only preferred embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art can easily make changes or modifications within the scope of the present invention, and such changes or modifications should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A protective device for a rising stem valve, characterized in that: include: A sleeve (10) for connecting to a rising stem valve, wherein a through hole (101) is formed at the top end of the sleeve (10). a connecting rod (20) extending through the through hole (101) and penetrating into the sheath (10); and A first cover plate (21) is arranged at the bottom end of the connecting rod (20) and is used to abut against the valve stem.

2. The protective device for rising stem valve according to claim 1, characterized in that: A second cover plate (22) is provided at the top end of the connecting rod (20) for contacting the sheath (10). When the rising-stem valve is in a fully open state, the first cover plate (21) moves upward under the pushing action of the valve stem to abut against the sleeve (10); when the rising-stem valve is in a fully closed state, the second cover plate (22) moves downward under the action of gravity to abut against the sleeve (10).

3. The protective device for rising stem valve according to claim 2, characterized in that: An indication area is provided on the outer wall of the connecting rod (20), and the indication area is marked in green.

4. The protective device for rising stem valve according to claim 3, characterized in that: At least two scale lines for displaying the valve opening are arranged on the indicating area.

5. The protective device for a rising stem valve according to any one of claims 1 to 4, characterized in that: The connecting rod (20) is composed of two connecting rod segments which are threadedly connected.

6. The protective device for a rising stem valve according to any one of claims 1 to 4, characterized in that: The jacket (10) comprises a body (11) configured as a cylindrical structure, and a flange (12) extending radially outward from the outer wall of the body (11).

7. The protective device for a rising stem valve according to claim 6, characterized in that: A plurality of bolt holes (121) are arranged at intervals along the circumference of the flange (12) and are used to match the rising stem valve.

8. The protective device for rising stem valve according to claim 7, characterized in that: An internal threaded hole (13) for fixedly connecting with the rising stem valve is provided on the inner wall of the body (11).

9. The protective device for a rising stem valve according to any one of claims 2 to 4, characterized in that: A sand-proof layer for abutting against the protective sleeve (10) is provided at the top end of the first cover plate (21) and the bottom end of the second cover plate (22), and the sand-proof layer is made of rubber.

10. The protection device for a rising stem valve according to any one of claims 2 to 4, characterized in that: The first cover plate (21) and the second cover plate (22) are both welded to the ends of the connecting rod (20).

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