Flat valve for petroleum pipeline

Abstract

The utility model relates to the technical field of flat valves, and particularly discloses a flat valve for a petroleum pipeline, which comprises a valve cover and a valve body, the valve cover is in threaded connection with a screw rod, the screw rod is rotatably connected with a valve rod, a valve plate is arranged in the valve body, the valve plate is fixedly connected with a sealing plate, the upper end of the sealing plate is connected with a sliding frame and a fixing block, and the sliding frame is fixedly connected with the fixing block. The screw rod is inserted into the fixed block through the insertion plate, and the sliding frame is connected with the fixed block through the fixed bolt; the utility model has the beneficial effects that the valve rod and the sealing plate can move synchronously through the connection of the insertion plate and the fixed block and the connection of the sliding frame and the sliding chute, the sliding frame and the fixed block can be fixed simultaneously through the fixing bolt, and the connection position of the insertion plate and the reinforcing block is a main stress point at the moment; the valve rod can be independently detached by rotating the fixing bolt and then sliding the sliding frame, the whole device is easy to use, the valve plate does not need to be replaced when the valve rod is replaced, and materials are saved.

Description

Technical Field

[0001] This utility model relates to the field of flat plate valve technology, specifically a flat plate valve for oil pipelines. Background Technology

[0002] Flat plate valves have good sealing performance and can effectively withstand the high pressure and high temperature environment in oil pipelines, reducing the risk of leakage. They are relatively simple in structure, easy to operate, and have relatively low maintenance costs.

[0003] Chinese patent CN222163617U discloses a hydraulic flat valve for oil drilling platforms, including a valve body. Two connecting pipes are fixedly connected to the side of the valve body, and the two connecting pipes are symmetrical about the centerline of the valve body. Two valve seat connectors are fixedly connected to the inner side of the valve body, and the valve seat connectors are fixedly connected to the inner side of the connecting pipes. A flat valve plate is slidably connected to the inner side of the valve body, and connecting grooves are provided on both sides of the flat valve plate. The advantage is that by providing connecting grooves on both sides of the flat valve plate and fixing valve seat connectors to one side of the connecting pipes, the valve seat connectors are slidably connected within the connecting grooves, preventing gaps during the up-and-down movement of the flat valve plate, thus enhancing the airtightness of the device.

[0004] However, in the aforementioned patent, the valve stem and valve plate are in direct contact and fixedly connected. During long-term use, the root of the valve stem is prone to stress concentration due to its smallest cross-sectional area. Under long-term high-pressure conditions, it is prone to fatigue fracture. When fracture occurs, part of the valve stem will be on the upper part of the valve plate, at which point the valve plate also needs to be replaced, resulting in a waste of materials. Utility Model Content

[0005] The purpose of this invention is to provide a flat plate valve for oil pipelines to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flat plate valve for oil pipelines, comprising: a valve cover and a valve body, the valve cover being threadedly connected to a screw, the screw being rotatably connected to a valve stem, a valve plate being disposed within the valve body, a sealing plate being fixedly connected to the valve plate, a sliding frame and a fixing block being connected to the upper end of the sealing plate, the screw being inserted into the fixing block via an insert plate, and the sliding frame and the fixing block being connected via fixing bolts.

[0007] Preferably, the upper end of the valve body is provided with a sealing groove, the valve cover is detachably installed on the upper end of the valve body, the inner wall of the valve cover is threadedly connected to the surface of the screw, and the valve cover is slidably connected to the valve stem.

[0008] Preferably, the upper end of the screw is fixedly connected to a turntable, the lower end of the screw is rotatably connected to the upper end of the valve stem through an interference fit of a bearing, the lower end of the valve stem passes through the sealing groove and is in close contact with the sealing plate, and a number of insert plates and reinforcing blocks are fixedly connected to the lower surface of the valve stem, with the reinforcing blocks fixedly connected to the insert plates.

[0009] Preferably, the lower end of the sealing plate is fixedly connected to the valve plate, and both sides of the valve plate and the sealing plate are in close contact with and slidably connected to the inner wall of the valve body. The upper end of the sealing plate is provided with several square grooves and guide rails, and the square grooves are connected to the end of the guide rails away from the valve stem. Several fixing blocks are fixedly connected to the upper end of the sealing plate.

[0010] Preferably, each of the fixing blocks has a sliding groove on both sides, the fixing blocks are U-shaped, and the insert plate is inserted into the fixing block.

[0011] Preferably, the lower end of the sliding frame is slidably connected to several guide rails, and the two sides of the inner wall of the sliding frame are slidably connected to the sliding groove.

[0012] Preferably, there are several fixing bolts, and the threaded ends of the fixing bolts pass through the sliding frame and the fixing block in sequence and are threadedly connected to both.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by connecting the insert plate and the fixed block, and at the same time connecting the sliding frame and the slide groove, the valve stem and the sealing plate can move synchronously. The sliding frame and the fixed block can be fixed at the same time by fixing bolts. At this time, the connection position between the insert plate and the reinforcing block is the main stress point. In case of breakage, the valve stem can be disassembled separately by rotating the fixing bolts and sliding the sliding frame. The device is easy to use and can be replaced without replacing the valve plate, thus saving materials. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional view of the valve body of this utility model;

[0016] Figure 3 This is a schematic diagram of the valve cover located on one side of the valve body according to this utility model;

[0017] Figure 4 This is a side view of the sealing plate of this utility model;

[0018] Figure 5 This is a top view of the insert plate of this utility model.

[0019] In the diagram: 1. Turntable; 2. Screw; 3. Valve stem; 4. Valve cover; 5. Valve body; 6. Sealing plate; 7. Valve plate; 8. Sliding frame; 9. Fixing block; 10. Guide rail; 11. Slide groove; 12. Fixing bolt; 13. Insert plate; 14. Reinforcing block; 15. Square groove; 16. Sealing groove. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0021] Please see Figures 1-5 This utility model provides a technical solution: a flat plate valve for oil pipelines, comprising: a valve cover 4 and a valve body 5. A sealing groove 16 is provided at the upper end of the valve body 5, which can cooperate with a sealing plate 6. When the sealing plate 6 contacts the sealing groove 16, it maintains an internal seal within the valve body 5. The valve cover 4 is detachably installed on the upper end of the valve body 5. Both the valve cover 4 and the valve body 5 are fixedly connected to flanges, and the flanges are connected by bolts to achieve a seal. The inner wall of the valve cover 4 is threadedly connected to the surface of a screw 2. When the screw 2 rotates, it can move along the surface of the valve cover 4. The valve cover 4 is slidably connected to the valve stem 3 by rotating downwards. The upper end of the screw 2 is fixedly connected to the turntable 1, which facilitates the rotation of the screw 2. The lower end of the screw 2 is rotatably connected to the upper end of the valve stem 3 by an interference fit bearing. When the screw 2 moves up and down, the valve stem 3 can move up and down accordingly. The lower end of the valve stem 3 passes through the sealing groove 16 and is in close contact with the sealing plate 6. Several insert plates 13 and reinforcing blocks 14 are fixedly connected to the lower surface of the valve stem 3. The reinforcing blocks 14 can improve the strength of the insert plates 13 and make them less prone to breakage. The reinforcing blocks 14 are fixedly connected to the insert plates 13.

[0022] After connecting the valve cover 4 to the valve body 5, rotate the turntable 1. At this time, rotating the turntable 1 will cause the screw 2 to start rotating and simultaneously drive the valve stem 3 to move up and down. The valve stem 3 will drive the slide plate 13 to move synchronously.

[0023] The lower end of the sealing plate 6 is fixedly connected to the valve plate 7, allowing the valve plate 7 to move. Both the valve plate 7 and the sealing plate 6 are in close contact with and slidably connected to the inner wall of the valve body 5 on both sides. The upper end of the sealing plate 6 has several square grooves 15 and guide rails 10. The width of the square grooves 15 is greater than that of the guide rails 10, facilitating the sliding of the sliding frame 8. The square grooves 15 are connected to the end of the guide rails 10 away from the valve stem 3. Several fixing blocks 9 are fixedly connected to the upper end of the sealing plate 6, limiting the position of the insert plate 13. The sides of the fixing blocks 9 are provided with sliding grooves 11, facilitating the sliding of the sliding frame 8. 9 is U-shaped, and the insert plate 13 is inserted into the fixing block 9. When the sliding frame 8 is connected to the fixing block 9, the vertical direction of the insert plate 13 is restricted by the sliding frame 8 and the sealing plate 6. The lower end of the sliding frame 8 is slidably connected to several guide rails 10. The two sides of the inner wall of the sliding frame 8 are slidably connected to the slide groove 11. When the sliding frame 8 slides along the guide rail 10 into the square groove 15, it can be removed. Several fixing bolts 12 are provided. The threaded end of the fixing bolt 12 passes through the sliding frame 8 and the fixing block 9 in sequence and is threadedly connected to both. The fixing bolt 12 can fix the sliding frame 8 and make the connection between the fixing block 9 and the sliding frame 8 more secure.

[0024] When the valve stem 3 drives the slide plate 13 to move up and down, it is limited by the sliding frame 8 and the sealing plate 6. At this time, the slide plate 13 can drive the sealing plate 6 to move up and down through the sliding frame 8, and then drive the valve plate 7 to move, thereby controlling the opening and closing state of the valve body 5.

[0025] In actual use, the lower end of the valve stem 3 is brought into contact with the valve plate 7, and the insert plate 13 is aligned with the fixing block 9. At this time, the sliding frame 8 is slid to connect with the slide groove 11. Then, the sliding frame 8 and the fixing block 9 are fixed at the same time by the fixing bolt 12. After the valve cover 4 is connected to the valve body 5, the valve plate 7 can be moved by rotating the turntable 1. At this time, the connection position between the insert plate 13 and the reinforcing block 14 is the main stress point. In case of breakage, the valve stem 3 can be disassembled by rotating the fixing bolt 12 and sliding the sliding frame 8. The device is easy to use and the valve stem 3 can be replaced separately.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flat plate valve for oil pipelines, characterized in that: The flat valve for oil pipelines includes: a valve cover (4) and a valve body (5). The valve cover (4) is threaded with a screw (2). The screw (2) is rotatably connected to a valve stem (3). A valve plate (7) is provided inside the valve body (5). A sealing plate (6) is fixedly connected to the valve plate (7). A sliding frame (8) and a fixing block (9) are connected to the upper end of the sealing plate (6). The screw (2) is inserted into the fixing block (9) through a plate (13). The sliding frame (8) and the fixing block (9) are connected by a fixing bolt (12).

2. A flat plate valve for oil pipelines according to claim 1, characterized in that: The upper end of the valve body (5) is provided with a sealing groove (16), and the valve cover (4) is detachably installed on the upper end of the valve body (5). The inner wall of the valve cover (4) is threadedly connected to the surface of the screw (2), and the valve cover (4) is slidably connected to the valve stem (3).

3. A flat plate valve for oil pipelines according to claim 1, characterized in that: The upper end of the screw (2) is fixedly connected to the turntable (1), and the lower end of the screw (2) is rotatably connected to the upper end of the valve stem (3) through an interference fit of the bearing. The lower end of the valve stem (3) passes through the sealing groove (16) and is in close contact with the sealing plate (6). Several insert plates (13) and reinforcing blocks (14) are fixedly connected to the lower surface of the valve stem (3). The reinforcing blocks (14) are fixedly connected to the insert plates (13).

4. A flat plate valve for oil pipelines according to claim 1, characterized in that: The lower end of the sealing plate (6) is fixedly connected to the valve plate (7). Both sides of the valve plate (7) and the sealing plate (6) are in close contact with the inner wall of the valve body (5) and are slidably connected. The upper end of the sealing plate (6) is provided with several square grooves (15) and guide rails (10). The square grooves (15) and the guide rails (10) are connected to the end away from the valve stem (3). Several fixing blocks (9) are fixedly connected to the upper end of the sealing plate (6).

5. A flat plate valve for oil pipelines according to claim 1, characterized in that: Each of the fixed blocks (9) has a sliding groove (11) on both sides. The fixed blocks (9) are U-shaped and the insert plate (13) is inserted into the fixed blocks (9).

6. A flat valve for oil pipelines according to claim 1, characterized in that: The lower end of the sliding frame (8) is slidably connected to several guide rails (10), and the two sides of the inner wall of the sliding frame (8) are slidably connected to the slide groove (11).

7. A flat plate valve for oil pipelines according to claim 1, characterized in that: The fixing bolts (12) are provided in several parts, and the threaded ends of the fixing bolts (12) pass through the sliding frame (8) and the fixing block (9) in sequence and are threadedly connected to both.

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