Valve rod sheath of flat gate valve

Abstract

The utility model discloses a valve rod sheath of a flat gate valve, and belongs to the technical field of electric gate valves. The protective sleeve comprises a protective sleeve body made of a transparent material, the pointer is fixedly connected to the top end of the valve rod; wherein the bottom of the protective sleeve body is fixedly connected with a first marking belt which indicates that the opening degree of a valve rod is closed, the top of the protective sleeve body is fixedly provided with a second marking belt which indicates that the opening degree of the valve rod is fully open, the bottom end of the protective sleeve body is provided with a connecting section, and the protective sleeve body is fixedly connected with a valve body through the connecting section. On-site indication can be better achieved, the performance in multiple aspects of production operation, video monitoring, visual inspection and the like is excellent, and the intrinsic safety of tank field operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of electric gate valve technology, and in particular to a valve stem sleeve for a flat gate valve. Background Technology

[0002] Currently, the valve stems of electric gate valves in large oil storage tank farms are all made of steel sleeves. Because these sleeves are opaque, the valve's opening and closing status cannot be observed on-site during operation. The control system in the central control room can only confirm the valve's status via feedback signals. If the valve communication malfunctions, the control system may receive false feedback, leading to operator errors and causing accidents such as oil spills, overflows, and water hammer, posing a significant safety hazard to the tank farm. To address these issues, some tank farms have created slots in the valve's steel sleeves for observation. However, this solution is not very intuitive, and dust can enter the valve stem after slotting, causing corrosion and damage. Another solution is to place a φ5 steel rod on top of the valve stem to indicate its movement. However, this is difficult to observe clearly in low light conditions at night, easily leading to misjudgments. Furthermore, the addition of the steel rod increases the risk of lightning strikes. Utility Model Content

[0003] The purpose of this utility model is to overcome the defects of the existing technology and provide a valve stem sleeve for a flat gate valve, which solves the problem that the on / off status of an electric gate valve cannot be directly viewed on-site in the existing technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] The valve stem sleeve of the flat gate valve disclosed in this utility model includes:

[0006] The transparent protective case body; and

[0007] The pointer is fixed to the top of the valve stem.

[0008] The sheath body has a first indicator band fixedly connected to the bottom of the sheath body to indicate that the valve stem is closed, and a second indicator band fixedly connected to the top of the sheath body to indicate that the valve stem is fully open. The bottom of the sheath body has a connecting section, which is fixedly connected to the valve body.

[0009] Furthermore, the sheath body has a light transmittance of %.

[0010] Furthermore, the sheath body is an organic glass cylindrical tube.

[0011] Furthermore, the connecting segment is formed with external threads.

[0012] Furthermore, the first marking strip is a blue reflective sticker.

[0013] Furthermore, the second marking strip is a yellow reflective sticker.

[0014] Furthermore, the pointer is a metal tube, and a red marking layer is fixed to the outer wall of the pointer.

[0015] Furthermore, the pointer diameter is larger than the valve stem diameter, and the outer wall of the pointer is in clearance fit with the sheath body.

[0016] In the above technical solution, the flat gate valve stem sleeve provided by this utility model has the following beneficial effects compared with the prior art:

[0017] The valve stem sleeve of the flat gate valve designed in this utility model has a transparent organic glass round tube as its body, which allows direct viewing of the valve's opening and closing status and can better realize on-site indication. At the same time, the pointer with a red indicator layer inside ensures real-time observation of the valve stem's opening and closing status and position on-site and via video. It performs excellently in many aspects such as production operation, video monitoring, and intuitive inspection, and improves the inherent safety of tank area operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the stem sleeve of the flat gate valve disclosed in this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Sheath body; 2. Pointer; 3. First indicator band; 4. Second indicator band; 5. Valve stem. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0023] See Figure 1 As shown;

[0024] A utility model flat gate valve stem sleeve includes: a sleeve body 1 and a pointer 2;

[0025] The sheath body 1 is made of transparent material, and the pointer 2 is fixed to the top of the valve stem 5;

[0026] The bottom of the sheath body 1 is fixedly connected to a first indicator band 3 indicating that the valve stem 5 is closed, and the top of the sheath body 1 is fixedly connected to a second indicator band 4 indicating that the valve stem 5 is fully open. That is to say, the bottom and top of the sheath body 1 are set with corresponding "0" and "100" opening values. When the valve stem drives the pointer 2 to correspond to the first indicator band 3, it means that the valve stem corresponds to the "0" opening value and is in the closed state. When the valve stem drives the pointer 2 to correspond to the second indicator band 4, it means that the valve stem corresponds to the "100" opening value and is in the fully open state.

[0027] The bottom end of the sheath body 1 has a connecting section, which is fixedly connected to the valve body.

[0028] Preferably, the sheath body 1 has a light transmittance of 92%. The material of the sheath body 1 can be an organic glass round tube, a transparent organic glass round tube, which has high hardness, high rigidity and high strength, high transparency, light transmittance of more than 92%, soft light and clear vision, excellent weather resistance, high surface hardness and surface gloss, wear resistance close to aluminum, good stability, resistance to corrosion by a variety of chemicals, and a temperature range of -40℃ to 70℃. Of course, it can also be other transparent materials with light transmittance greater than 92%, cold resistance and high temperature resistance in the prior art.

[0029] The connecting section at the bottom of the sheath body 1 has an external thread, and the sheath body 1 and the valve body are fixedly connected by a threaded connection.

[0030] Preferably, the first identification strip 3 is a blue reflective sticker, and the second identification strip 4 is a yellow reflective sticker. The first identification strip 3 and the second identification strip 4 are affixed to the outer wall of the sheath body 1.

[0031] Preferably, pointer 2 is a metal tube with a red marking layer fixed to its outer wall. The diameter of pointer 2 is larger than that of valve stem 5. The outer wall of pointer 2 is fitted with the sheath body 1 with a clearance to ensure smooth lifting and lowering. Specifically, pointer 2 is a 304 stainless steel tube with a wall thickness of 0.9-1mm. The outer wall of the steel tube is fixed with a red marking layer, which can be a red reflective sticker. In this structure, by using a transparent organic glass tube for the valve stem sheath and a pointer with an inner red marking layer fixed to the top of the valve stem, the valve opening status can be directly viewed through the glass tube, and the valve stem opening can be confirmed through the pointer with the inner red marking layer, making it perform better in production operations, video monitoring, and visual inspection.

[0032] In the above technical solution, the flat gate valve stem sleeve provided by this utility model has a sleeve body 1 made of transparent organic glass round tube, which can better realize on-site indication. At the same time, the pointer 2 with a red indicator layer is lined inside to ensure that the valve stem opening and closing status and opening position can be observed on-site and in video in real time. The flat gate valve stem sleeve effectively solves the problem that the valve stem opening and closing status and opening position cannot be viewed on-site and in video, thus improving the inherent safety of tank area operation.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A stem sleeve for a flat gate valve, characterized in that, include: The transparent sheath body (1); and The pointer (2) is fixed to the top of the valve stem (5); The sheath body (1) has a first indicator band (3) at the bottom indicating that the valve stem (5) is closed, and a second indicator band (4) at the top indicating that the valve stem (5) is fully open. The sheath body (1) also has a connecting section at the bottom, which is fixedly connected to the valve body.

2. The stem sleeve of the flat gate valve according to claim 1, characterized in that... ； The sheath body (1) has a light transmittance of 92%.

3. The stem sleeve of the flat gate valve according to claim 2, characterized in that... ； The sheath body (1) is an organic glass round tube.

4. The stem sleeve of the flat gate valve according to claim 1 or 2, characterized in that... ； The connecting section has external threads.

5. The stem sleeve of the flat gate valve according to claim 1, characterized in that... ； The first identification strip (3) is a blue reflective sticker.

6. The stem sleeve of the flat gate valve according to claim 1, characterized in that... ； The second identification strip (4) is a yellow reflective sticker.

7. The stem sleeve of the flat gate valve according to claim 1, characterized in that... ； The pointer (2) is a metal tube, and a red marking layer is fixed to the outer wall of the pointer (2).

8. The stem sleeve of the flat gate valve according to claim 7, characterized in that; The diameter of the pointer (2) is larger than the diameter of the valve stem (5), and the outer wall of the pointer (2) is in clearance fit with the sheath body (1).

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