Self-closing safety valve for natural gas

Abstract

The safety valve comprises a main body pipeline and a movable plate, a limiting clamping groove is formed in one side of the upper portion of the interior of the main body pipeline, a storage groove is formed in the upper portion of the front side of the interior of the main body pipeline, and a rotating spring is arranged in the storage groove; a limiting clamping groove is formed in the upper portion of the outer portion of the movable plate, a limiting clamping block is arranged on the upper portion of one side of the outer portion of the movable plate, a supporting shaft is arranged in the middle of the inner side of the movable plate, and a rotating spring is arranged on the surface of one end of the outer portion of the supporting shaft. The movable plate in the vertical state can immediately rotate towards one side through the rotating spring, the movable plate can be kept in the stable state through the limiting clamping groove and the limiting clamping block so as to achieve the automatic closing state, and the situation that the valve body can be rapidly closed due to pressure impact, and consequently a system generates adverse effects is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of natural gas valves, in particular to a self-closing safety valve for natural gas. Background Art

[0002] A safety valve is a special valve whose opening and closing parts are in a normally closed state under the action of external force. When the medium pressure in the equipment or pipeline rises above the specified value, it prevents the medium pressure in the pipeline or equipment from exceeding the specified value by discharging the medium outside the system.

[0003] In an emergency, the existing common safety valves may close quickly due to pressure shock, causing the medium to suddenly stop flowing, which may have an adverse effect on the system. Utility Model Content

[0004] The utility model aims to provide a self-closing safety valve for natural gas, which can solve the problem of preventing the valve from closing quickly due to pressure shock in an emergency, reduce the sudden stop of medium flow, reduce the impact on the system, and improve the safety of the system.

[0005] To achieve the above-mentioned purpose, a safety valve for natural gas self-closing is provided, comprising a main pipe and a movable plate, a limit card groove is arranged on one side above the inside of the main pipe, a storage groove is arranged on the upper front side of the inside of the main pipe, a rotation spring is arranged inside the storage groove, a limit card block is arranged on one side above the outside of the movable plate, a support shaft is arranged in the middle part of the inner side of the movable plate, a rotation spring is arranged on the surface of one end of the outer side of the support shaft, a rubber ring is arranged on the surrounding surface of the outer side of the movable plate, a connecting groove is arranged on the other side of the middle part of the inner side of the main pipe, a semi-arc groove is arranged on the middle surface of one side of the connecting groove, a valve shaft is arranged inside the connecting groove, a positioning card block is arranged on the surface of one side above the valve shaft, a valve body is arranged on the inner end of the valve shaft, a rotating handle is arranged on the outer end of the valve shaft, a threaded ring is arranged on the top of the main pipe, and a threaded groove is arranged on the bottom of the main pipe.

[0006] According to the self-closing safety valve for natural gas, the middle inner side of the movable plate is fixedly contacted and connected with the support shaft, the movable plate maintains a supporting effect with the upper space inside the main pipe through the support shaft, the storage groove is recessed and connected with the upper front side of the main pipe, the rotation spring is fixedly connected with the inside of the storage groove through the outer end surface of the support shaft, and the support shaft is elastically supported and connected with the internal space of the main pipe through the rotation spring.

[0007] According to the self-closing safety valve for natural gas, the limit slot is recessed and connected with the upper side of the interior of the main pipeline, the limit block is fixedly connected with the upper side of the exterior of the movable plate, and the movable plate is connected with the positioning support inside the main pipeline through the limit slot and the interior of the limit block.

[0008] According to the self-closing safety valve for natural gas, the rubber ring is fixedly contacted and connected with the peripheral surface of the outer side of the movable plate, and the rubber ring forms a sealed contact state with the inner wall of the main pipe through the rotation of the movable plate.

[0009] According to the self-closing safety valve for natural gas, the communicating groove is connected with the other side of the middle part of the main pipeline, and the semi-arc groove is connected with the middle surface of one side of the communicating groove.

[0010] According to the self-closing safety valve for natural gas, the valve shaft is sealed and contacted with the inside of the connecting groove, the upper side surface of the valve shaft is fixedly contacted with the positioning block, and the valve shaft is connected to the inside of the connecting groove through the limiting contact connection between the positioning block and the semi-arc groove.

[0011] According to the self-closing safety valve for natural gas, the valve body is contact-connected with the internal support of the main pipeline through a fixed connection at the inner end of the valve shaft, and the rotating handle is fixedly connected to the outer end of the valve shaft.

[0012] According to the self-closing safety valve for natural gas, the threaded ring is fixedly connected to the top of the main pipe, the threaded groove is recessedly connected to the bottom of the main pipe, and the main pipe is threadedly sealed by the threaded ring and the threaded groove.

[0013] The above scheme has the beneficial effect: through the provision of the movable plate, support shaft, rotation spring, limit slot and limit block, when the natural gas pressure medium stops flowing, the movable plate in a vertical state will immediately rotate to one side through the rotation spring, and the limit slot and limit block can be used to keep the movable plate in a stable state to achieve an automatic closing state, thereby preventing the valve body from closing quickly due to pressure shock, causing adverse effects on the system.

[0014] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments;

[0016] Figure 1This is a schematic diagram of the structure of a self-closing safety valve for natural gas according to the utility model;

[0017] Figure 2 This is a structural cross-sectional view of a self-closing safety valve for natural gas according to the utility model;

[0018] Figure 3 This is a schematic structural diagram of a movable plate for a natural gas self-closing safety valve according to the utility model;

[0019] Figure 4 This is a schematic structural diagram of a valve body of a self-closing safety valve for natural gas according to the utility model;

[0020] Figure 5 The utility model is a structural perspective view of a main pipeline of a natural gas self-closing safety valve.

[0021] Legend:

[0022] 1. Main pipe; 2. Threaded ring; 3. Connecting groove; 4. Valve shaft; 5. Turning handle; 6. Threaded groove; 7. Limiting card slot; 8. Valve body; 9. Movable plate; 10. Semi-arc groove; 11. Support shaft; 12. Limiting card block; 13. Rotating spring; 14. Rubber ring; 15. Positioning card block; 16. Storage slot. DETAILED DESCRIPTION

[0023] This section will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation on the protection scope of the utility model.

[0024] Reference Figure 1-5 The utility model embodiment is a safety valve for natural gas that can be self-closed, which includes a main body pipeline 1 and a movable plate 9, a limited position card groove 7 is arranged on one side of the upper part of the main body pipeline 1, a storage groove 16 is arranged on the upper front side of the main body pipeline 1, a rotation spring 13 is arranged inside the storage groove 16, a limited position card block 12 is arranged on one side of the outer side of the movable plate 9, a support shaft 11 is arranged in the middle part of the inner side of the movable plate 9, a rotation spring 13 is arranged on the outer end surface of the support shaft 11, a rubber ring 14 is arranged on the outer peripheral surface of the movable plate 9, a connecting groove 3 is arranged on the other side of the middle part of the main body pipeline 1, a semi-arc groove 10 is arranged on the middle surface of one side of the connecting groove 3, a valve shaft 4 is arranged inside the connecting groove 3, a positioning card block 15 is arranged on the upper side surface of the valve shaft 4, a valve body 8 is arranged on the inner end of the valve shaft 4, and a rotating handle 5 is arranged on the outer end of the valve shaft 4, a threaded ring 2 is arranged on the top of the main body pipeline 1, and a threaded groove 6 is arranged on the bottom of the main body pipeline 1.

[0025] The middle part of the inner side of the movable plate 9 is fixedly contacted and connected with the support shaft 11, and the movable plate 9 maintains a supporting effect with the upper space inside the main pipe 1 through the support shaft 11. The storage groove 16 is recessed and connected with the upper front side of the main pipe 1. The rotation spring 13 is fixedly connected with the inner surface of the storage groove 16 through the outer end surface of the support shaft 11. The support shaft 11 is elastically supported and connected with the inner space of the main pipe 1 through the rotation spring 13. The limiting groove 7 is recessed and connected with the upper side of the inner part of the main pipe 1. The limiting block 12 is fixedly connected with the upper side of the outer side of the movable plate 9. The movable plate 9 is connected with the inner positioning support of the main pipe 1 through the limiting groove 7 and the limiting block 12. The rubber ring 14 is fixedly contacted and connected with the outer peripheral surface of the movable plate 9. The rubber ring 14 forms a sealed contact state with the inner wall of the main pipe 1 through the rotation of the movable plate 9. The connecting groove 3 is connected and connected with the other side of the middle of the inner part of the main pipe 1. The semi-arc groove 10 is connected The middle surface of one side of the connecting groove 3 is engaged and recessed, the valve shaft 4 is connected to the inside of the connecting groove 3 in a sealed contact manner, the surface of one side above the valve shaft 4 is fixedly contacted and connected to the positioning block 15, the valve shaft 4 is connected to the inside of the connecting groove 3 in a limited rotation manner through the limiting contact between the positioning block 15 and the semi-arc groove 10, by setting the positioning block 15 and the semi-arc groove 10, the valve shaft 4 can be rotated in a space inside the connecting groove 3 to prevent the valve shaft 4 from being loose in the close contact state with the inside of the connecting groove 3 when the connecting groove 3 is rotated and adjusted for a long time, which may easily lead to deflation of the safety valve, the valve body 8 is connected to the internal support contact of the main pipeline 1 through the fixed connection of the inner end of the valve shaft 4, the rotating handle 5 is fixedly connected to the outer end of the valve shaft 4, the threaded ring 2 is fixedly connected to the top of the main pipeline 1, the threaded groove 6 is engaged and recessed with the bottom of the main pipeline 1, and the main pipeline 1 is threadedly sealed through the threaded ring 2 and the threaded groove 6.

[0026] Working principle: before installation, the valve body 8 and the inside of the main pipeline 1 are first placed in a closed and sealed mode, and the main pipeline 1 of the safety valve for natural gas is fixedly connected to the connection position through the threaded ring 2 and the threaded groove 6. When the natural gas pressure medium is working normally, the movable plate 9 is in a vertical state with the upper part of the inside of the main pipeline 1 through the support shaft 11. By turning the handle 5, the valve body 8 is engaged with the inside of the main pipeline 1 through the valve shaft 4, thereby achieving the function of conveying natural gas through the inside of the main pipeline 1. When the natural gas pressure medium stops flowing, the movable plate 9 in the vertical state will immediately rotate to one side through the rotating spring 13. The limit card groove 7 and the limit card block 12 can be used to keep the movable plate 9 in a stable state to achieve an automatically closed state, so as to avoid the valve body 8 from being quickly closed due to pressure shock, resulting in adverse effects on the system.

[0027] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A self-closing safety valve for natural gas, comprising: The main pipe (1) and the movable plate (9) are characterized in that a limit card slot (7) is provided on one side of the upper part of the main pipe (1), a storage slot (16) is provided on the upper front side of the main pipe (1), a rotation spring (13) is provided inside the storage slot (16), a limit card block (12) is provided on one side of the outer side of the movable plate (9), a support shaft (11) is provided in the middle part of the inner side of the movable plate (9), a rotation spring (13) is provided on the outer end surface of the support shaft (11), and a rubber is provided on the outer peripheral surface of the movable plate (9). A ring (14) is provided on the other side of the middle part of the main pipe (1), a connecting groove (3) is provided on the middle surface of one side of the connecting groove (3), a valve shaft (4) is provided inside the connecting groove (3), a positioning block (15) is provided on the upper surface of one side of the valve shaft (4), a valve body (8) is provided at the inner end of the valve shaft (4), a rotating handle (5) is provided at the outer end of the valve shaft (4), a threaded ring (2) is provided at the top of the main pipe (1), and a threaded groove (6) is provided at the bottom of the main pipe (1).

2. A self-closing safety valve for natural gas according to claim 1, characterized in that: The middle part of the inner side of the movable plate (9) is fixedly contacted and connected with the support shaft (11); the movable plate (9) maintains a supporting effect with the upper space inside the main pipe (1) through the support shaft (11); the storage groove (16) is connected with the upper front side of the main pipe (1) by an engaging recess; the rotation spring (13) is fixedly connected with the inner side of the storage groove (16) through the outer end surface of the support shaft (11); the support shaft (11) is elastically supported and connected with the inner space of the main pipe (1) through the rotation spring (13).

3. A self-closing safety valve for natural gas according to claim 1, characterized in that: The limiting card slot (7) is recessedly connected to the upper side of the interior of the main pipe (1), the limiting card block (12) is fixedly connected to the upper side of the exterior of the movable plate (9), and the movable plate (9) is connected to the interior of the main pipe (1) through the limiting card slot (7) and the limiting card block (12) for positioning support.

4. A self-closing safety valve for natural gas according to claim 1, characterized in that: The rubber ring (14) is fixedly contacted with the outer peripheral surface of the movable plate (9), and the rubber ring (14) forms a sealed contact state with the inner wall of the main pipe (1) through the rotation of the movable plate (9).

5. A self-closing safety valve for natural gas according to claim 1, characterized in that: The communicating groove (3) is connected in an engaging and communicating manner with the other side of the middle part of the main pipe (1), and the semi-arc groove (10) is connected in an engaging and recessed manner with the middle surface of one side of the communicating groove (3).

6. A self-closing safety valve for natural gas according to claim 5, characterized in that: The valve shaft (4) is connected in sealing contact with the inside of the connecting groove (3); the upper side surface of the valve shaft (4) is fixedly connected in contact with the positioning block (15); and the valve shaft (4) is connected in limited rotation with the inside of the connecting groove (3) via a limited contact connection between the positioning block (15) and the semi-arc groove (10).

7. A self-closing safety valve for natural gas according to claim 1, characterized in that: The valve body (8) is connected to the inner support of the main pipeline (1) through a fixed connection at the inner end of the valve shaft (4), and the rotating handle (5) is fixedly connected to the outer end of the valve shaft (4).

8. A self-closing safety valve for natural gas according to claim 1, characterized in that: The threaded ring (2) is fixedly connected to the top of the main pipe (1), the threaded groove (6) is recessedly connected to the bottom of the main pipe (1), and the main pipe (1) is threadedly sealed via the threaded ring (2) and the threaded groove (6).

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