Coal bed gas wellhead pressure relief device

Abstract

The utility model belongs to the field of coal bed gas wellhead pressure relief devices, and particularly relates to a coal bed gas wellhead pressure relief device which comprises a pressure relief device body, a rotating handle is arranged at the top of the pressure relief device body, a fixing pipe is arranged on the outer side of the pressure relief device body, and a connecting pipe is arranged at the bottom of the fixing pipe. A sealing mechanism is arranged in the fixing pipe, and a pressure relief opening is formed in the outer side of the pressure relief device body. According to the scheme, the rotating sleeve, the rotating block, the bearing, the screw, the sliding groove, the guide frame and other components are designed, the bottom of the pressure relief device body is inserted into the designated position in the fixing pipe, then the rotating sleeve and the screw are rotated to make threaded motion, the screw moves to drive the semicircular sealing sleeve and other components to move, and the semicircular sealing sleeve moves to the pressure relief device body; and therefore, the joint of the pressure relief device main body and the fixed pipe is sealed, and gas leakage at the joint of the pressure relief device main body and the fixed pipe is prevented.

Description

Technical Field

[0001] The utility model belongs to the field of coal bed gas well head pressure relief devices, in particular to a coal bed gas well head pressure relief device. Background Art

[0002] Coalbed methane, also known as coal mine gas, is a natural gas found in coal seams. It is mainly composed of methane and also contains a small amount of carbon dioxide, nitrogen and sulfide. The exploration and development of coalbed methane is an important industrial activity, which can not only improve the utilization rate of energy, but also reduce the occurrence of coal mine accidents. The coalbed methane wellhead pressure relief device is an important equipment in the coalbed methane mining process, which is used to control the pressure at the wellhead to prevent explosions or other safety accidents at the wellhead. The coalbed methane wellhead pressure relief device is generally composed of valves, pipelines and control systems. When the wellhead pressure exceeds the set value, the valve will automatically open and discharge the high-pressure gas to a safe area to reduce the wellhead pressure. The control system monitors the wellhead pressure and adjusts and controls it according to the set parameters. The main function of the coalbed methane wellhead pressure relief device is to ensure the safety of the wellhead and prevent wellhead explosions or other accidents. It can quickly respond to changes in wellhead pressure and take timely measures to relieve pressure to keep the wellhead pressure within a safe range. At the same time, it can also reduce coalbed methane leakage and improve the efficiency of coalbed methane collection. In the prior art, when the device is in use, the device has no sealing mechanism, and the connection between the pressure relief device body and the fixed pipe is not easy to be sealed, which may cause gas leakage at the connection between the pressure relief device body and the fixed pipe. Moreover, when the device is not in use, the device has no dustproof mechanism, and the device is not easy to be dustproof, which makes the device inconvenient to use. Therefore, it is necessary to improve the prior art. Summary of the invention

[0003] The utility model aims to provide a coalbed methane wellhead pressure relief device, which solves the problem that when the device is in use, the device has no sealing mechanism, the connection between the pressure relief device body and the fixed pipe is inconvenient to be sealed, which may cause gas leakage at the connection between the pressure relief device body and the fixed pipe, and when the device is not in use, the device has no dustproof mechanism, the device is inconvenient to be dustproof, and the device is inconvenient to use.

[0004] In order to achieve the above-mentioned purpose, the utility model provides a coalbed methane wellhead pressure relief device, including a pressure relief device body, a rotating handle is arranged on the top of the pressure relief device body, a fixed pipe is arranged on the outside of the pressure relief device body, a connecting pipe is arranged on the bottom of the fixed pipe, a sealing mechanism is arranged inside the fixed pipe, a pressure relief port is arranged on the outside of the pressure relief device body, and a dust prevention mechanism is arranged on the outside of the pressure relief port.

[0005] The principle of the utility model is that when the connection between the pressure relief device body and the fixed pipe needs to be sealed, the bottom of the pressure relief device body is inserted into the designated position in the fixed pipe, and then the rotating block is rotated, the rotating block rotates to drive the rotating sleeve to rotate, the rotating sleeve rotates and the screw rod is threaded, so that the screw rod is relatively displaced, the screw rod moves to drive the guide frame and the semicircular sealing sleeve to move, the semicircular sealing sleeve moves to contact the pressure relief device body, so that the connection between the pressure relief device body and the fixed pipe is sealed, and gas leakage is prevented at the connection between the pressure relief device body and the fixed pipe;

[0006] When the device needs to be dustproof, the mobile dust cover drives the block, spring and other components to move, the dust cover, block and other components move toward the pressure relief port, the block moves and contacts the pressure relief port, and then the block moves into the dust cover, the movement of the block drives the guide block to move, the movement of the block compresses the spring, after the dust cover and other components move to the specified position on the pressure relief port, the elastic force of the spring pushes the block and other components to move, the block moves into the card slot, and then the dust cover and other components are limited, so that the device is dustproof and easy to use.

[0007] The beneficial effects of the utility model are as follows: the present invention inserts the bottom of the pressure relief device body into the designated position in the fixed tube by designing components such as a rotating sleeve, a rotating block, a bearing, a screw, a sliding groove and a guide frame, and then rotates the rotating sleeve to generate a threaded motion with the screw, and the movement of the screw drives the movement of components such as a semicircular sealing sleeve, and the semicircular sealing sleeve moves to the pressure relief device body, thereby sealing the connection between the pressure relief device body and the fixed tube to prevent gas leakage at the connection between the pressure relief device body and the fixed tube, and by designing components such as a dust cover, a slot, a block, a guide groove, a guide block and a spring, the dust cover is moved to drive the block and other components to move, and the dust cover and other components are moved to the designated position on the pressure relief port, and the block is moved into the slot, thereby limiting the position of the dust cover and other components, thereby making the device dustproof and easy to use.

[0008] Furthermore, the sealing mechanism includes a rotating sleeve, the interior of the fixed tube is rotatably connected to the rotating sleeve, a rotating block is fixedly connected to the rotating sleeve, a screw is threadedly connected to the interior of the rotating sleeve, the interior of the fixed tube is slidably connected to the screw, a guide frame is fixedly connected to the outer side of the screw, a semicircular sealing sleeve is fixedly connected to the screw, the interior of the fixed tube is slidably connected to the semicircular sealing sleeve, and the semicircular sealing sleeve contacts the main body of the pressure relief device. By inserting the bottom of the main body of the pressure relief device into a designated position in the fixed tube, and then rotating the rotating sleeve to generate a threaded motion with the screw, the movement of the screw drives the semicircular sealing sleeve and other components to move, and the semicircular sealing sleeve moves to the main body of the pressure relief device, thereby sealing the connection between the main body of the pressure relief device and the fixed tube, and preventing gas leakage at the connection between the main body of the pressure relief device and the fixed tube.

[0009] Furthermore, the inner fixed sleeve of the fixed tube is connected with a bearing, and the inner fixed sleeve of the bearing is connected with a rotating sleeve. The bearing can be designed to support the rotating sleeve to rotate.

[0010] Furthermore, a sliding groove is provided inside the fixed tube, and a guide frame is slidably connected inside the sliding groove. By designing the sliding groove, the guide frame can slide in the sliding groove.

[0011] Furthermore, the dustproof mechanism includes a dustproof cover, the outer side of the pressure relief port is slidably connected with the dustproof cover, the pressure relief port is provided with a slot, the slot is slidably connected with a block, the dustproof cover is provided with a spring, the dustproof cover is slidably connected with a block, and the outer side of the block is fixedly connected with a guide block. The dustproof cover is driven to move the block and other components by moving the dustproof cover, the dustproof cover and other components are moved to a designated position on the pressure relief port, the block is moved into the slot, and the dustproof cover and other components are limited, so that the device is dustproof and easy to use.

[0012] Furthermore, a guide groove is provided inside the dust cover, and a guide block is slidably connected inside the guide groove. By designing the guide groove, the guide block can slide in the guide groove.

[0013] Furthermore, one end of the spring is fixedly connected with a clamping block, and the other end of the spring is fixedly connected with a dust cover. The spring is designed so that the clamping block has an elastic effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a three-dimensional diagram of the overall structure of a coalbed methane wellhead pressure relief device according to an embodiment of the present invention;

[0015] Figure 2 The coal bed gas wellhead pressure relief device of the embodiment of the present invention Figure 1 A sectional stereogram of the overall structure;

[0016] Figure 3 The coal bed gas wellhead pressure relief device of the embodiment of the present invention Figure 1 A front cross-sectional view of

[0017] Figure 4 The coal bed gas wellhead pressure relief device of the embodiment of the present invention Figure 3 A magnified image of point A;

[0018] Figure 5 The coal bed gas wellhead pressure relief device of the embodiment of the present invention Figure 2 A magnified view of the dust cover;

[0019] Figure 6 The coal bed gas wellhead pressure relief device of the embodiment of the present invention Figure 5 Enlarged view of point B. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The figure marks in the drawings of the specification include: pressure relief device body 1, rotating handle 2, fixed tube 3, connecting tube 4, sealing mechanism 5, rotating sleeve 51, rotating block 52, bearing 53, screw 54, sliding groove 55, guide frame 56, semicircular sealing sleeve 57, pressure relief port 6, dustproof mechanism 7, dustproof cover 71, slot 72, block 73, guide slot 74, guide block 75, spring 76.

[0022] like Figure 1 — Figure 6 As shown, this embodiment provides a coalbed methane wellhead pressure relief device, including a pressure relief device body 1, a rotating handle 2 is arranged on the top of the pressure relief device body 1, a fixed pipe 3 is arranged on the outside of the pressure relief device body 1, a connecting pipe 4 is arranged on the bottom of the fixed pipe 3, a sealing mechanism 5 is arranged inside the fixed pipe 3, a pressure relief port 6 is arranged on the outside of the pressure relief device body 1, and a dust prevention mechanism 7 is arranged on the outside of the pressure relief port 6.

[0023] like Figure 2 , Figure 3 , Figure 4 As shown, the sealing mechanism 5 includes a rotating sleeve 51, the interior of the fixed tube 3 is rotatably connected to the rotating sleeve 51, the rotating block 52 is fixedly connected to the rotating sleeve 51, the interior of the fixed tube 3 is fixedly connected to a bearing 53, the interior of the bearing 53 is fixedly connected to the rotating sleeve 51, and the bearing 53 is designed to support the rotation of the rotating sleeve 51, the interior of the rotating sleeve 51 is connected to a screw 54 through a thread, the interior of the fixed tube 3 is provided with a sliding groove 55, the interior of the sliding groove 55 is slidably connected to a guide frame 56, and the sliding groove 55 is designed to allow the guide frame 56 to slide in the sliding groove 55, the interior of the fixed tube 3 is slidably connected to the screw 54, and the screw 54 A guide frame 56 is fixedly connected to the outside of the fixed tube 3, a semicircular sealing sleeve 57 is fixedly connected to the screw 54, and a semicircular sealing sleeve 57 is slidably connected to the inside of the fixed tube 3. The semicircular sealing sleeve 57 contacts the pressure relief device body 1. By inserting the bottom of the pressure relief device body 1 into a specified position in the fixed tube 3, and then rotating the rotating sleeve 51 and the screw 54 to generate threaded motion, the movement of the screw 54 drives the semicircular sealing sleeve 57 and other components to move, and the semicircular sealing sleeve 57 moves to the pressure relief device body 1, so that the connection between the pressure relief device body 1 and the fixed tube 3 is sealed to prevent gas leakage at the connection between the pressure relief device body 1 and the fixed tube 3.

[0024] like Figure 2 , Figure 3 , Figure 5 , Figure 6As shown, the dustproof mechanism 7 includes a dustproof cover 71, the outer side of the pressure relief port 6 is slidably connected with the dustproof cover 71, the pressure relief port 6 is provided with a card slot 72, the card slot 72 is slidably connected with a card block 73, the dustproof cover 71 is provided with a guide slot 74, the guide slot 74 is slidably connected with a guide block 75, and the guide slot 74 is designed to allow the guide block 75 to slide in the guide slot 74, and the dustproof cover 71 is provided with a spring 76, one end of the spring 76 is fixedly connected with the card block 73, and the spring 76 The other end is fixedly connected to a dust cover 71, and a spring 76 is designed to make the block 73 have an elastic effect. The dust cover 71 is slidably connected to the inside, and the outside of the block 73 is fixedly connected to a guide block 75. The dust cover 71 is moved to drive the block 73 and other components to move, and the dust cover 71 and other components are moved to a specified position on the pressure relief port 6, and the block 73 is moved into the slot 72, so that the dust cover 71 and other components are limited, so that the device is dustproof and easy to use.

[0025] The specific implementation process of the utility model is as follows: when the connection between the pressure relief device body 1 and the fixed pipe 3 needs to be sealed, the bottom of the pressure relief device body 1 is inserted into the specified position in the fixed pipe 3, and then the rotating block 52 is rotated, the rotating block 52 rotates to drive the rotating sleeve 51 to rotate, the rotating sleeve 51 rotates and makes a threaded motion with the screw 54, so that the screw 54 is relatively displaced, the screw 54 moves to drive the guide frame 56 and the semicircular sealing sleeve 57 to move, the semicircular sealing sleeve 57 moves to contact the pressure relief device body 1, so that the connection between the pressure relief device body 1 and the fixed pipe 3 is sealed, and gas leakage is prevented at the connection between the pressure relief device body 1 and the fixed pipe 3;

[0026] When the device is not in use, the movable dust cover 71 drives the block 73, the spring 76 and other components to move, the dust cover 71, the block 73 and other components move toward the pressure relief port 6, the block 73 moves and contacts the pressure relief port 6, and then the block 73 moves into the dust cover 71, the movement of the block 73 drives the guide block 75 to move, the movement of the block 73 compresses the spring 76, after the dust cover 71 and other components move to the specified position on the pressure relief port 6, the elastic force of the spring 76 pushes the block 73 and other components to move, the block 73 moves into the slot 72, and then the dust cover 71 and other components are limited, so that the device is dustproof and easy to use.

[0027] In this scheme, by designing components such as a rotating sleeve 51, a rotating block 52, a bearing 53, a screw 54, a sliding groove 55 and a guide frame 56, the bottom of the pressure relief device body 1 is inserted into a specified position in the fixed tube 3, and then the rotating sleeve 51 is rotated to generate a threaded motion with the screw 54, and the movement of the screw 54 drives the semicircular sealing sleeve 57 and other components to move, and the semicircular sealing sleeve 57 moves to the pressure relief device body 1, thereby sealing the connection between the pressure relief device body 1 and the fixed tube 3 to prevent gas leakage at the connection between the pressure relief device body 1 and the fixed tube 3, and by designing components such as a dust cover 71, a slot 72, a block 73, a guide slot 74, a guide block 75 and a spring 76, the dust cover 71 is moved to drive the block 73 and other components to move, and the dust cover 71 and other components are moved to the specified position on the pressure relief port 6, and the block 73 moves into the slot 72, thereby limiting the dust cover 71 and other components, thereby making the device dustproof and easy to use.

[0028] It should be noted in advance that, in the present invention, unless otherwise clearly specified and limited, the terms "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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A coalbed methane wellhead pressure relief device, comprising a pressure relief device body, characterized in that: A rotating handle is provided on the top of the pressure relief device body, a fixing pipe is provided on the outside of the pressure relief device body, a connecting pipe is provided on the bottom of the fixing pipe, a sealing mechanism is provided inside the fixing pipe, a pressure relief port is provided on the outside of the pressure relief device body, and a dustproof mechanism is provided on the outside of the pressure relief port.

2. The coalbed methane wellhead pressure relief device according to claim 1, characterized in that: The sealing mechanism includes a rotating sleeve, the interior of the fixed tube is rotatably connected to the rotating sleeve, the rotating sleeve is fixedly connected to a rotating block, the interior of the rotating sleeve is threadedly connected to a screw, the interior of the fixed tube is slidably connected to a screw, the outer side of the screw is fixedly connected to a guide frame, the screw is fixedly connected to a semicircular sealing sleeve, the interior of the fixed tube is slidably connected to the semicircular sealing sleeve, and the semicircular sealing sleeve contacts a pressure relief device body.

3. The coalbed methane wellhead pressure relief device according to claim 1, characterized in that: The inner fixed sleeve of the fixed tube is connected with a bearing, and the inner fixed sleeve of the bearing is connected with a rotating sleeve.

4. The coalbed methane wellhead pressure relief device according to claim 1, characterized in that: A sliding groove is provided inside the fixed tube, and a guide frame is slidably connected inside the sliding groove.

5. The coalbed methane wellhead pressure relief device according to claim 1, characterized in that: The dustproof mechanism includes a dustproof cover, the outer side of the pressure relief port is slidably connected with the dustproof cover, the interior of the pressure relief port begins to have a slot, the interior of the slot is slidably connected with a block, a spring is provided inside the dustproof cover, the interior of the dustproof cover is slidably connected with a block, and the outer side of the block is fixedly connected with a guide block.

6. The coalbed methane wellhead pressure relief device according to claim 5, characterized in that: A guide groove is provided inside the dust cover, and a guide block is slidably connected inside the guide groove.

7. The coalbed methane wellhead pressure relief device according to claim 5, characterized in that: One end of the spring is fixedly connected with a clamping block, and the other end of the spring is fixedly connected with a dust cover.

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