Gas blowout preventer convenient to open and close

Abstract

The gas blowout preventer convenient to open and close relates to the technical field of coal mine drilling rigs and comprises a valve body, connecting pipes are fixedly mounted on the left side and the right side of the outer surface of the valve body respectively, a valve element is rotatably arranged on the inner surface of the valve body in an attached mode, a through cavity is formed in the middle of the surface of the valve element, and the size of the through cavity corresponds to that of the connecting pipes. Sealing strips are fixedly installed on the inner surface of the valve body and located on the upper side and the lower side of the valve element, an opening and closing mechanism is arranged at the upper end of the outer surface of the valve body, and a locking piece is arranged on the surface of the opening and closing mechanism. Compared with an existing common gas blowout preventer, the gas blowout preventer convenient to open and close has the advantages that opening of the gas blowout preventer is controlled only by pressing a hand lever downwards, closing of the gas blowout preventer is controlled only by pulling the hand lever upwards, the hand lever can automatically move upwards through a thrust spring, and the hand lever is not prone to falling off after moving upwards to be closed; the operation mode of opening and closing control of the device is greatly simplified, and use is simpler and more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine drilling rigs, in particular to a gas blowout prevention device which is easy to open and close. Background Art

[0002] Coal mine gas, also known as coalbed methane or coalbed methane, is a mixture of methane, carbon dioxide, and nitrogen that escapes from coal and surrounding rock. Gas is a harmful element in coal mining operations. It not only pollutes the air but, when the gas content in the air reaches 5% to 16%, can cause explosions and accidents when exposed to fire. During coal mine construction, drilling is often required in gas-bearing layers to extract the gas. This extraction is often done through pipelines equipped with valves to control gas flow and prevent it from being ejected directly through interconnected pipes.

[0003] For example, the public document with application number 202122408536.5 discloses an airtight gas blowout preventer. This utility model uses an airtight method to effectively prevent gas leakage from the drill pipe during drilling construction without adding other auxiliary equipment. The gas source used adopts the existing wind pressure underground. However, the middle sealing box of this gas blowout preventer is equivalent to a control valve, and the opening and closing of the valve is difficult to control conveniently. For example, the existing valve device mostly uses a handwheel and a screw to rotate and open and close when opening and closing. It needs to be rotated continuously, and it is difficult to achieve fast and efficient opening and closing control, which is not conducive to rapid control and use.

[0004] Therefore, in view of this, the existing structural deficiencies are studied and improved, and a gas blowout prevention device that is easy to open and close is proposed. Utility Model Content

[0005] The purpose of the utility model is to provide a gas blowout prevention device that is easy to open and close, so as to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a gas blowout preventer that is easy to open and close, comprising a valve body, connecting pipes are fixedly installed on the left and right sides of the outer surface of the valve body, a valve core is provided on the inner surface of the valve body for fitting and rotation, a through cavity is provided in the middle of the surface of the valve core, the size of the through cavity corresponds to the connecting pipe, sealing strips are fixedly installed on the upper and lower sides of the valve core on the inner surface of the valve body, an opening and closing mechanism is provided on the upper end of the outer surface of the valve body, and a locking member is provided on the surface of the opening and closing mechanism.

[0007] Preferably, the opening and closing mechanism includes a fixed box fixedly installed on the upper end of the outer surface of the valve body, and a gear is rotatably provided on the inner surface of the fixed box, and the lower surface of the gear is fixedly connected to the upper end of the valve core by a connecting rod.

[0008] Preferably, the opening and closing mechanism also includes racks meshingly arranged on the front and rear sides of the gear surface, and the end of the rack away from the gear slides through the fixed box and is rotatably installed with a movable rod, and the upper end of the movable rod is tilted and rotated toward the middle of the fixed box and is connected to the same hand lever.

[0009] Preferably, the opening and closing mechanism further comprises a sleeve fixedly mounted on the upper side of the outer surface of the fixed box, the sleeve being sleeved on the outside of the hand lever, a thrust spring being fixedly mounted at the upper edge of the sleeve, and the upper end of the thrust spring being fixedly connected to the hand lever.

[0010] Preferably, the locking member includes tension springs fixedly installed below the left and right sides of the outer surface of the sleeve, and a pin is fixedly installed on the opposite end of the tension spring. The opposite end of the pin slides through the sleeve, and the upper surface of the pin at one end inside the sleeve is set as an inclined surface.

[0011] Preferably, the locking member further comprises positioning holes provided below the left and right sides of the surface of the handle, and the diameter of the positioning holes matches the diameter of the latch pin.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] When the cam is opened, the gears are pulled inwards, and the gears are engaged, and the gears are engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged, and the cam is engaged,

[0014] 2. The utility model is provided with a locking piece, a tension spring, a latch and a positioning hole. When the hand lever is pressed down to open the valve, when the hand lever moves down almost to the bottom end of the sleeve, the inclined surface will be used to push the latch to extend outward and extend the tension spring. When the hand lever moves down to the bottom of the sleeve, the positioning hole and the latch are aligned. Under the action of the tension spring, the latch will be inserted into the positioning hole, thereby locking the downward position of the hand lever, so that the valve can be stably opened. When the valve needs to be closed, the personnel only needs to manually pull the latch out of the positioning hole to release the limit on the hand lever. At this time, the hand lever will automatically move up using the thrust spring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the closed structure of the valve body of the utility model;

[0017] Figure 3 This is a schematic diagram of the valve body opening structure of the utility model;

[0018] Figure 4 This is a schematic diagram of the locking structure of the utility model.

[0019] In the figure: 1. Valve body; 2. Connecting pipe; 3. Valve core; 4. Through cavity; 5. Sealing strip; 6. Opening and closing mechanism; 601. Fixed box; 602. Gear; 603. Rack; 604. Movable rod; 605. Hand lever; 606. Sleeve; 607. Thrust spring; 7. Locking piece; 701. Tension spring; 702. Latch; 703. Positioning hole. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] like Figures 1-4 As shown, a gas blowout preventer that is easy to open and close includes a valve body 1. Connecting pipes 2 are fixedly installed on the left and right sides of the outer surface of the valve body 1. A valve core 3 is rotatably provided on the inner surface of the valve body 1. A through cavity 4 is provided in the middle of the surface of the valve core 3. The size of the through cavity 4 corresponds to the connecting pipe 2. Sealing strips 5 are fixedly installed on the upper and lower sides of the valve core 3 on the inner surface of the valve body 1. An opening and closing mechanism 6 is provided on the upper end of the outer surface of the valve body 1, and a locking member 7 is provided on the surface of the opening and closing mechanism 6.

[0022] By adopting the above technical solution, when the valve core 3 is located at the front and rear sides of the through cavity 4, it can block the connecting pipes 2 on the left and right sides, so that the valve body 1 is in a blocked and closed state; when the valve core 3 is located at the left and right sides of the through cavity 4, it can connect the connecting pipes 2 on both sides, so that the valve body 1 can be opened; the sealing strip 5 can prevent the valve core 3 from aging and reducing its sealing performance, and perform secondary sealing protection on the upper and lower sides of the valve core 3 to ensure the sealing performance.

[0023] Furthermore, the opening and closing mechanism 6 includes a fixed box 601 fixedly installed on the upper end of the outer surface of the valve body 1, and a gear 602 is rotatably provided on the inner surface of the fixed box 601. The lower surface of the gear 602 is fixedly connected to the upper end of the valve core 3 by a connecting rod.

[0024] By adopting the above technical solution, the gear 602 can drive the valve core 3 to rotate when it rotates.

[0025] Furthermore, the opening and closing mechanism 6 also includes a rack 603 meshingly arranged on the front and rear sides of the surface of the gear 602. The end of the rack 603 away from the gear 602 slides through the fixed box 601 and is rotatably installed with a movable rod 604. The upper end of the movable rod 604 is tilted and rotated toward the middle of the fixed box 601 and is connected to the same hand rod 605.

[0026] By adopting the above technical solution, when the hand lever 605 is pressed down, the hand lever 605 will use the movable rod 604 to pull the rack 603 to both sides, thereby using the moving force of the rack 603 to engage the gear 602 to rotate, thereby driving the valve core 3 to rotate, rotating the through cavity 4 to connect with the connecting pipe 2, and then the entire valve body 1 can be opened;

[0027] At this time, the upper handle rod 605 will use the movable rod 604 to pull the rack 603 inward, and the meshing gear 602 will rotate in the opposite direction, which can drive the valve core 3 to rotate and move the through cavity 4 to the front and rear side positions. The valve core 3 will block the connecting pipe 2 and close it.

[0028] Furthermore, the opening and closing mechanism 6 also includes a sleeve 606 fixedly installed on the upper side of the outer surface of the fixed box 601, the sleeve 606 is sleeved on the outside of the hand rod 605, and a thrust spring 607 is fixedly installed at the upper edge of the sleeve 606, and the upper end of the thrust spring 607 is fixedly connected to the hand rod 605.

[0029] By adopting the above technical solution, the hand rod 605 can move up and down more stably when the sleeve 606 is engaged; the thrust spring 607 can automatically move the hand rod 605 upward and ensure that the hand rod 605 will not fall easily after moving upward and closing, thereby ensuring the closing stability of the valve body 1.

[0030] Furthermore, the locking member 7 includes a tension spring 701 fixedly installed on the lower left and right sides of the outer surface of the sleeve 606, and a pin 702 is fixedly installed on the opposite end of the tension spring 701. The opposite end of the pin 702 slides through the sleeve 606, and the upper surface of the end of the pin 702 located inside the sleeve 606 is set as an inclined surface.

[0031] By adopting the above technical solution, when the hand rod 605 moves down almost to the bottom end of the sleeve 606, the inclined surface will push the pin 702 to extend outward and extend the tension spring 701, ensuring that the hand rod 605 can move down without obstruction.

[0032] Furthermore, the locking member 7 further includes positioning holes 703 provided on the lower left and right sides of the surface of the handle 605 . The diameter of the positioning holes 703 matches the diameter of the latch 702 .

[0033] By adopting the above technical solution, when the hand lever 605 moves down to the bottom of the sleeve 606, the positioning hole 703 is aligned with the latch 702. Under the action of the tension spring 701, the latch 702 is inserted into the positioning hole 703, thereby locking the downward position of the hand lever 605, so that the valve body 1 can be stably opened.

[0034] Working principle: When using this easy-to-open and close gas blowout preventer, first, connect the entire valve body 1 to the gas pipeline using the connecting pipe 2. Then, when you need to open the valve body 1, you only need to press down the hand lever 605. The hand lever 605 will use the movable rod 604 to pull the rack 603 to both sides, thereby using the moving force of the rack 603 to engage the gear 602 to rotate, thereby driving the valve core 3 to rotate, and rotating the through cavity 4 to connect with the connecting pipe 2. The entire valve body 1 can then be opened to carry out gas transportation. , and during the opening process, when the hand lever 605 moves down and is about to reach the bottom end of the sleeve 606, the inclined surface will be used to push the latch 702 to extend outward and the tension spring 701 will be extended. When the hand lever 605 moves down to the bottom end of the sleeve 606, the positioning hole 703 is aligned with the latch 702. Under the action of the tension spring 701, the latch 702 is inserted into the positioning hole 703, thereby locking the hand lever 605 in the downward position, so that the valve body 1 can be stably opened without manual continuous pressing;

[0035] When there is no need to transport gas, personnel only need to manually pull the pin 702 out of the positioning hole 703 to release the limit on the hand lever 605. At this time, the hand lever 605 will automatically move up using the thrust spring 607. The upward moving hand lever 605 will use the movable rod 604 to pull the rack 603 inward, and the meshing gear 602 will rotate in the opposite direction, which can drive the valve core 3 to rotate and move the through cavity 4 to the front and rear side positions. The valve core 3 will block the connecting pipe 2, and the valve body 1 can be closed. After moving up and closing, the hand lever 605 will not fall easily under the action of the thrust spring 607, thereby ensuring stable closure, thereby preventing gas from spraying out through the valve body 1. This is the working principle of the gas blowout preventer that is easy to open and close.

Claims

1. A gas blowout prevention device that is easy to open and close, comprising a valve body (1), characterized in that: Connecting pipes (2) are fixedly mounted on the left and right sides of the outer surface of the valve body (1); a valve core (3) is rotatably mounted on the inner surface of the valve body (1); a through cavity (4) is provided in the middle of the surface of the valve core (3); the size of the through cavity (4) corresponds to that of the connecting pipe (2); sealing strips (5) are fixedly mounted on the upper and lower sides of the valve core (3) on the inner surface of the valve body (1); an opening and closing mechanism (6) is provided on the upper end of the outer surface of the valve body (1); and a locking member (7) is provided on the surface of the opening and closing mechanism (6).

2. The gas blowout prevention device that is easy to open and close according to claim 1, characterized in that: The opening and closing mechanism (6) comprises a fixed box (601) fixedly mounted on the upper end of the outer surface of the valve body (1); a gear (602) is rotatably provided on the inner surface of the fixed box (601); and the lower surface of the gear (602) is fixedly connected to the upper end of the valve core (3) by a connecting rod.

3. The gas blowout prevention device that is easy to open and close according to claim 1, characterized in that: The opening and closing mechanism (6) further comprises a rack (603) meshed with the front and rear sides of the gear (602); one end of the rack (603) away from the gear (602) slides through the fixed box (601) and is rotatably mounted with a movable rod (604); the upper end of the movable rod (604) is connected to the same hand rod (605) by tilting and rotating toward the middle of the fixed box (601).

4. The gas blowout prevention device that is easy to open and close according to claim 1, characterized in that: The opening and closing mechanism (6) further comprises a sleeve (606) fixedly mounted on the upper side of the outer surface of the fixed box (601), the sleeve (606) being sleeved on the outer side of the hand lever (605), a thrust spring (607) being fixedly mounted on the upper edge of the sleeve (606), and the upper end of the thrust spring (607) being fixedly connected to the hand lever (605).

5. The gas blowout prevention device that is easy to open and close according to claim 1, characterized in that: The locking member (7) includes tension springs (701) fixedly mounted below the left and right sides of the outer surface of the sleeve (606), and a latch (702) fixedly mounted on the opposite end of the tension spring (701). The opposite end of the latch (702) slides through the sleeve (606), and the upper surface of one end of the latch (702) located inside the sleeve (606) is set as an inclined surface.

6. The gas blowout prevention device that is easy to open and close according to claim 1, characterized in that: The locking member (7) further comprises positioning holes (703) provided below the left and right sides of the surface of the hand lever (605), wherein the aperture of the positioning holes (703) matches the diameter of the latch pin (702).

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