Large-bore bellows stop valve

Abstract

The application provides a large-diameter corrugated pipe stop valve, which comprises a valve body, a vertical accommodating cavity is formed in the top of the valve body, a through hole is formed in the wall body at the bottom of the accommodating cavity, a first cavity is formed in one end of the valve body and communicates with the side wall of the accommodating cavity, a second cavity is formed in the other end of the valve body and extends to the bottom of the accommodating cavity and communicates with the through hole, a first valve cover is arranged above the valve body, a pipeline accommodating cavity is arranged on the top of the first valve cover, a valve rod is sleeved with a corrugated pipe, the corrugated pipe is arranged in the pipeline accommodating cavity, a fixing ring is connected to the top of the corrugated pipe, a second valve cover is arranged above the fixing ring and is connected with the pipeline accommodating cavity through bolts, a pair of screw holes are formed in the side of the fixing ring along the radial direction, the valve rod is connected with a valve disc through the first valve cover, the valve disc is arranged in alignment with the through hole, and the top of the valve rod is connected with a lifting mechanism. The pipeline accommodating cavity and the valve cover are arranged integrally and do not need to be arranged on the valve body, and the valve rod and the corrugated pipe can be taken out by screwing a screw rod into the screw hole of the fixing ring.

Description

Technical Field

[0001] This utility model belongs to the field of gate valve technology, and is particularly related to a large-diameter bellows gate valve. Background Technology

[0002] As one of the most important shut-off valves, the gate valve plays a vital role in the aerospace field. As a crucial component of aerospace equipment, the gate valve performs functions such as media transport, shut-off, and regulation. Existing bellows gate valves consist of a accommodating pipe with an extended welded bellows at the top of the valve body, which is inconvenient for manufacturing and affects the valve's aesthetics. Furthermore, the existing gate valves make it difficult to remove the bellows and valve stem, impacting maintenance efficiency. Therefore, improvements are necessary. Utility Model Content

[0003] To address the aforementioned deficiencies in the prior art, this application provides a large-diameter bellows gate valve, in which the bellows housing the pipe and the valve cover are integrally integrated, eliminating the need for a separate component on the valve body. The valve stem and bellows can be easily removed by screwing a screw into the threaded hole of the fixing ring.

[0004] To achieve the above objectives, the present invention employs the following technology:

[0005] A large-diameter bellows gate valve, comprising:

[0006] The valve body has a vertical accommodating cavity at its top, a through hole at the bottom wall of the accommodating cavity, a first cavity communicating with the side wall of the accommodating cavity at one end of the valve body, and a second cavity extending to the bottom of the accommodating cavity and communicating with the through hole at the other end of the valve body.

[0007] The first valve cover is located above the valve body, and a receiving pipe is provided at the bottom of the first valve cover;

[0008] A valve stem is coaxially fitted with a bellows, the bottom of which is welded to the valve stem. The bellows is located inside the receiving pipe, and a fixing ring is connected to the top of the bellows. The fixing ring is sealed to the top of the first valve cover. A second valve cover is located above the fixing ring and is bolted to the receiving pipe. A pair of threaded holes are provided on the side of the fixing ring along its radial direction. The valve stem passes through the first valve cover and is connected to a valve disc, which is located inside the receiving cavity and aligned with the through hole. The top of the valve stem passes through the second valve cover and is connected to a lifting mechanism, which is used to drive the valve stem to move up and down.

[0009] Furthermore, a sealing ring is provided at the bottom of the fixing ring, and the sealing ring abuts against the top of the first valve cover.

[0010] Furthermore, a vertical scale is provided above the second valve cover, on which valve opening values ​​are marked from bottom to top. One end of a pointer is connected to the side of the valve stem, and the other end of the pointer is set towards the scale. When the valve stem moves down to its maximum extent, the other end of the pointer is aligned with the valve opening value at the bottom of the scale.

[0011] Furthermore, the lifting mechanism is equipped with a protective cover, and the protective cover has transparent windows around its perimeter. When the valve stem rises a preset distance, the top of the valve stem extends into the protective cover.

[0012] The beneficial effects of this utility model are as follows:

[0013] 1. The bellows housing the pipe and valve cover are integrated, so they do not need to be installed on the valve body. The valve stem and bellows can be easily removed by screwing a screw into the threaded hole of the fixing ring.

[0014] 2. The valve opening can be determined by the pointer and scale when the valve stem rises and falls. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of an embodiment of this application.

[0016] Figure 2 for Figure 1 Enlarged view of section A in the middle.

[0017] Figure 3 This is a cross-sectional view of the protective cover in an embodiment of this application.

[0018] Reference numerals: Valve body-1, accommodating cavity-101, first cavity-102, second cavity-103, through hole-104, first valve cover-2, accommodating pipe-201, valve stem-3, bellows-4, retaining ring-401, second valve cover-5, bolt-6, threaded hole-4011, valve disc-301, lifting mechanism-7, sealing ring-4012, scale-8, valve opening value-801, pointer-9, protective cover-10, window-1001. Detailed Implementation

[0019] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0020] This application provides a large-diameter bellows gate valve, such as... Figures 1-3 As shown, it includes valve body 1, first valve cover 2, valve stem 3, etc.

[0021] Specifically, the valve body 1 has a vertical accommodating cavity 101 at its top, and a through hole 104 on the bottom wall of the accommodating cavity 101. One end of the valve body 1 has a first cavity 102 communicating with the side wall of the accommodating cavity 101, and the other end of the valve body 1 has a second cavity 103 extending to the bottom of the accommodating cavity 101 and communicating with the through hole 104. A first valve cover 2 is located above the valve body 1, and a accommodating pipe 201 is located at the bottom of the first valve cover 2. The first valve cover 2 can be integrally formed with the accommodating pipe 201. A bellows 4 is coaxially sleeved around the valve stem 3, and the bottom of the bellows 4 is welded to the valve stem 3. The bellows 4 is located in... Inside the receiving pipe 201, a fixing ring 401 is connected to the top of the bellows 4. The fixing ring 401 is sealed to the top of the first valve cover 2. A second valve cover 5 is provided above the fixing ring 401. The second valve cover 5 is connected to the receiving pipe 201 by bolts 6. The side of the fixing ring 401 has a pair of threaded holes 4011 along its radial direction. The valve stem 3 passes through the first valve cover 2 and is connected to a valve disc 301. The valve disc 301 is located in the receiving cavity 101 and is aligned with the through hole 104. The top of the valve stem 3 passes through the second valve cover 5 and is connected to a lifting mechanism 7. The lifting mechanism 7 is used to drive the valve stem 3 to move up and down. Specifically, a sealing ring 4012 is provided at the bottom of the fixing ring 401. The sealing ring 4012 abuts against the top of the first valve cover 2, thereby achieving a sealed connection between the fixing ring 401 and the receiving pipe 201.

[0022] More specifically, the lifting mechanism 7 is a conventional technology in the field and can be directly fixed to the second valve cover 5. The lifting mechanism 7 can be a pneumatic lifting device, with its telescopic end connected to the valve stem 3. Alternatively, a threaded section can be provided on the valve stem 3, and an internal threaded sleeve can be connected to the external thread of the threaded section. The internal threaded sleeve can be restricted to move up and down by a connecting ring, so that it can only rotate. Then, a first bevel gear ring is provided outside the internal threaded sleeve, and a second bevel gear ring is provided to mesh with the first bevel gear ring. A connecting shaft is provided inside the second bevel gear ring, and a handwheel is connected to the outer end of the connecting shaft. By rotating the handwheel, the first bevel gear ring and the second bevel gear ring can be rotated, which in turn drives the internal threaded sleeve to rotate, and the internal threaded sleeve will drive the valve stem 3 to move up and down.

[0023] In actual use, the lifting mechanism 7 drives the valve stem 3 to rise, and the bottom of the bellows 4 moves upward under the action of the valve stem 3, opening the through hole 104 and connecting the first cavity 102 and the second cavity 103. During this process, because the bellows 4 is elastic, the top of the bellows 4 will always be connected to the fixing ring 401 and maintain a sealed connection with the top of the accommodating pipe 201. The lifting mechanism 7 drives the valve stem 3 to fall, causing the valve disc 301 to block the through hole 104, thus isolating the first cavity 102 and the second cavity 103 and closing the shut-off valve. When the shut-off valve needs to be repaired, the bolt 6 is removed, the second valve cover 5 is removed, and then a screw is screwed into the threaded hole 4011 on the side of the fixing ring 401. The two screws can be used to easily apply force to remove the valve stem 3 and the bellows 4, improving disassembly efficiency.

[0024] Preferred options, please refer to Figure 2 A vertical scale 8 is located above the second valve cover 5, displaying valve opening values ​​801 that gradually increase from bottom to top. One end of a pointer 9 is connected to the circumference of the valve stem 3, with the other end of the pointer 9 pointing towards the scale 8. When the valve stem 3 moves downwards to its maximum extent, the other end of the pointer 9 aligns with the valve opening value 801 at the bottom of the scale 8. When the valve stem 3 moves upwards, the pointer 9 also moves upwards synchronously, pointing to the corresponding valve opening value 801, facilitating the operator's judgment of the valve opening. For details, please refer to [link / reference]. Figure 1 , Figure 3 The lifting mechanism 7 is equipped with a protective cover 10, and the protective cover 10 has transparent windows 1001 around its perimeter. When the valve stem 3 rises a preset distance, the top of the valve stem 3 extends into the protective cover 10. This provides a clear view through the windows 1001 during the rising and falling process of the valve stem 3, allowing observation of the degree of vertical movement of the valve stem 3. At the same time, it prevents the top of the valve stem 3 from being exposed after rising, thus avoiding contact with dust, moisture, or other impurities, which could affect the service life of the valve stem 3.

[0025] The above are only some of the embodiments listed in this application and are not intended to limit this application.

Claims

1. A large-diameter bellows gate valve, characterized in that, include: The valve body (1) has a vertical accommodating cavity (101) at its top and a through hole (104) on the wall at the bottom of the accommodating cavity (101). One end of the valve body (1) has a first cavity (102) that communicates with the side wall of the accommodating cavity (101), and the other end of the valve body (1) has a second cavity (103) that extends to the bottom of the accommodating cavity (101) and communicates with the through hole (104). The first valve cover (2) is located above the valve body (1), and the bottom of the first valve cover (2) is provided with a receiving pipe (201). A valve stem (3) is coaxially fitted with a bellows (4). The bottom of the bellows (4) is welded to the valve stem (3). The bellows (4) is located inside the accommodating pipe (201). A fixing ring (401) is connected to the top of the bellows (4). The fixing ring (401) is sealed to the top of the first valve cover (2). A second valve cover (5) is provided above the fixing ring (401). The second valve cover (5) is connected to the accommodating pipe (201) by bolts (6). A pair of threaded holes (4011) are provided on the side of the fixing ring (401) along its radial direction. The valve stem (3) passes through the first valve cover (2) and is connected to a valve disc (301). The valve disc (301) is located inside the accommodating cavity (101) and is aligned with the through hole (104). The top of the valve stem (3) passes through the second valve cover (5) and is connected to a lifting mechanism (7). The lifting mechanism (7) is used to drive the valve stem (3) to move up and down.

2. The large-diameter bellows gate valve according to claim 1, characterized in that, The bottom of the fixing ring (401) is provided with a sealing ring (4012), and the sealing ring (4012) abuts against the top of the first valve cover (2).

3. A large-diameter bellows gate valve according to claim 1, characterized in that, The second valve cover (5) is provided with a vertical scale (8) above it. The scale (8) is marked with valve opening values ​​(801) that gradually increase from bottom to top. The valve stem (3) is connected to one end of a pointer (9) around its perimeter. The other end of the pointer (9) is set towards the scale (8). When the valve stem (3) moves down to the maximum extent, the other end of the pointer (9) is aligned with the valve opening value (801) at the bottom of the scale (8).

4. A large-diameter bellows gate valve according to claim 1, characterized in that, The lifting mechanism (7) is provided with a protective cover (10), and the protective cover (10) is provided with a transparent window (1001) around its perimeter. When the valve stem (3) rises a preset distance, the top of the valve stem (3) extends into the protective cover (10).

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