Coal bed gas well pressure regulating valve

Abstract

The utility model relates to the technical field of coal bed gas well, especially a coal bed gas well pressure regulation and control valve, including the valve body, the flange is fixedly connected on the valve body, the threaded rod is screw -threaded penetration connection on the valve body, the hand wheel is fixedly connected on the threaded rod, the sealing block is rotatably connected through the bearing on the threaded rod, the spring is fixedly connected on the sealing block, the valve piece is fixedly connected on the spring, the valve piece and the sealing block are connected through the connecting mechanism, and the hand wheel is limited through the limiting mechanism. The utility model avoids the false touch of hand wheel, the change of set pressure, and avoids the influence on the use of valve.

Description

TECHNICAL FIELD

[0001] The utility model relates to coal bed gas well technical field especially relates to a coal bed gas well pressure regulation valve. BACKGROUND

[0002] The coal bed gas well pressure regulation valve is the key equipment for controlling and adjusting the gas production and pressure of the coal bed gas well mouth, and is very important for ensuring the stable production and safe operation of the coal bed gas well. The existing pressure regulation valve reaches the set diffusion pressure by adjusting the spring force of the valve, and once the set pressure is exceeded, the pressure is automatically released to avoid the overload and explosion of the valve, thereby playing the explosion-proof role. However, since the threaded rod of the valve is not fixed, the threaded rod is prone to be accidentally touched, which changes the set pressure of the valve and causes the actual pressure of the valve to be too large or too small, thereby affecting the use of the valve. SUMMARY

[0003] The utility model discloses a coal bed gas well pressure regulation valve to solve the problem that the actual pressure of the valve is too large or too small, thereby affecting the use of the valve.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A coal bed gas well pressure regulation valve is designed, which comprises a valve body, a flange fixedly connected to the valve body, a threaded rod threadedly penetratingly connected to the valve body, a hand wheel fixedly connected to the threaded rod, a sealing block rotatably connected to the threaded rod through a bearing, a spring fixedly connected to the sealing block, a valve piece fixedly connected to the spring, a connecting mechanism connecting the valve piece and the sealing block, and a limiting mechanism limiting the hand wheel.

[0006] Preferably, the valve body is provided with a pressure gauge.

[0007] Preferably, the connecting mechanism comprises a limiting cylinder fixedly connected to the valve piece, a connecting rod provided in the limiting cylinder, and the connecting rod is fixedly connected to the sealing block.

[0008] Preferably, the limiting mechanism comprises a stand column fixedly connected to the hand wheel, a connecting cylinder sleeved on the stand column, a rotating mechanism connecting the valve body and the connecting cylinder, a fastening bolt threadedly penetratingly connected to the connecting cylinder, and the fastening bolt abuts against the stand column.

[0009] Preferably, the rotating mechanism comprises a T-shaped sliding groove annularly provided on the valve body, and a T-shaped sliding block slidingly provided in the T-shaped sliding groove and fixedly connected to the connecting cylinder.

[0010] The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected.

[0012] Figure 2 The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected.

[0013] Figure 3 The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected.

[0014] Figure 4 The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected. Figure 3 The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected.

[0015] Figure 5 The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected. Figure 1 The coal bed gas well pressure regulating valve has the beneficial effects that the hand wheel is fixed by the limiting mechanism, rotation of the hand wheel is prevented, the threaded rod is prevented from moving in the axial direction, and thus the hand wheel is prevented from being accidentally touched, the set pressure is prevented from being changed, and use of the valve is not affected.

[0016] In the figure, 1 is a valve body, 2 is a flange, 3 is a pressure gauge, 4 is a threaded rod, 5 is a hand wheel, 6 is a T-shaped sliding groove, 7 is a T-shaped sliding block, 8 is a connecting cylinder, 9 is a stand, 10 is a valve piece, 11 is a fastening bolt, 12 is a sealing block, 13 is a spring, 14 is a limiting cylinder, and 15 is a connecting rod. DETAILED DESCRIPTION

[0017] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application.

[0018] Embodiment 1: Refer to Figures 1-5The utility model provides a kind of coalbed gas well pressure regulating valve, including valve body 1, flange 2 is fixedly connected on valve body 1, threaded rod 4 is screw through connection on valve body 1, hand wheel 5 is fixedly connected on threaded rod 4, sealing block 12 is rotatably connected on threaded rod 4 by bearing, spring 13 is fixedly connected on sealing block 12, valve piece 10 is fixedly connected on spring 13, and valve piece 10 is connected between sealing block 12 by connecting mechanism, hand wheel 5 is limited by limiting mechanism, after the set pressure of valve is adjusted, hand wheel 5 is fixed by limiting mechanism, the rotation of hand wheel 5 is prevented, threaded rod 4 moves in axial direction, so as to avoid the mis-touch of hand wheel 5, the change of set pressure, avoid the influence of the use of valve.

[0019] Pressure gauge 3 is provided on valve body 1, to monitor the pressure of valve.

[0020] Limiting mechanism includes stand 9, stand 9 is fixedly connected with hand wheel 5, connecting cylinder 8 is sleeved on stand 9, connecting cylinder 8 is connected with valve body 1 by rotating mechanism, fastening bolt 11 is screw through connection on connecting cylinder 8, fastening bolt 11 is abutted with stand 9, by using fastening bolt 11, stand 9 is connected with connecting cylinder 8, so as to limit hand wheel 5, prevent hand wheel 5 from moving in axial direction, avoid changing the compression amount of spring 13.

[0021] Rotating mechanism includes T-shaped sliding slot 6, T-shaped sliding slot 6 is annularly provided on valve body 1, T-shaped sliding block 7 is slidably arranged in T-shaped sliding slot 6, T-shaped sliding block 7 is fixedly connected with connecting cylinder 8, when rotating hand wheel 5, fastening bolt 11 is disassembled, so as to release the limitation of hand wheel 5, hand wheel 5 drives T-shaped sliding block 7 to slide in T-shaped sliding slot 6 when rotating.

[0022] When using, fastening bolt 11 is disassembled, so as to release the limitation of hand wheel 5, hand wheel 5 drives T-shaped sliding block 7 to slide in T-shaped sliding slot 6 when rotating, threaded rod 4 drives sealing block 12 to move, the compression amount of spring 13 is changed, after reaching set pressure by referring to pressure gauge 3, fastening bolt 11 is tightened, stand 9 is connected with connecting cylinder 8, so as to limit hand wheel 5, prevent mis-touch from making hand wheel 5 move in axial direction, when the pressure in coalbed gas well exceeds set pressure, valve piece 10 is pushed open, and automatically open to release pressure.

[0023] Example 2: refer to Figures 1-4As another preferred embodiment of the utility model, on the basis of embodiment 1, connecting mechanism includes limit cylinder 14, limit cylinder 14 is fixedly connected on valve piece 10, connecting rod 15 is arranged in limit cylinder 14, connecting rod 15 is fixedly connected with sealing block 12, sealing ring is arranged on sealing block 12, sealing ring is in abutment with valve body 1, through limit cylinder 14 and connecting rod 15, the effect of connection is played to valve piece 10, prevent the situation that valve piece 10 appears deviation.

[0024] The above is only the preferred specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art in the technical range disclosed by the utility model, according to the technical scheme and utility model concept of the utility model, equivalent replacement or change are covered in the protection scope of the utility model.

Claims

1. A pressure regulating valve for coalbed methane wells, comprising a valve body (1), characterized in that, A flange (2) is fixedly connected to the valve body (1). A threaded rod (4) is threaded through the valve body (1). A handwheel (5) is fixedly connected to the threaded rod (4). A sealing block (12) is rotatably connected to the threaded rod (4) via a bearing. A spring (13) is fixedly connected to the sealing block (12). A valve plate (10) is fixedly connected to the spring (13). The valve plate (10) and the sealing block (12) are connected by a connecting mechanism. The handwheel (5) is limited by a limiting mechanism.

2. The pressure regulating valve for a coalbed methane well according to claim 1, characterized in that, A pressure gauge (3) is installed on the valve body (1).

3. The pressure regulating valve for a coalbed methane well according to claim 1, characterized in that, The connecting mechanism includes a limiting cylinder (14), which is fixedly connected to the valve plate (10). A connecting rod (15) is provided inside the limiting cylinder (14), and the connecting rod (15) is fixedly connected to the sealing block (12).

4. A pressure regulating valve for coalbed methane wells according to any one of claims 1-3, characterized in that, The limiting mechanism includes a column (9), which is fixedly connected to the handwheel (5). A connecting cylinder (8) is sleeved on the column (9). The connecting cylinder (8) is connected to the valve body (1) through a rotating mechanism. A fastening bolt (11) is threaded through the connecting cylinder (8) and abuts against the column (9).

5. A pressure regulating valve for coalbed methane wells according to claim 4, characterized in that, The rotating mechanism includes a T-shaped groove (6), which is annularly formed on the valve body (1). A T-shaped slider (7) is slidably disposed in the T-shaped groove (6), and the T-shaped slider (7) is fixedly connected to the connecting cylinder (8).

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