A safety valve for pressure pipeline

Abstract

The utility model relates to a safety valve for a pressure pipeline, comprising a safety valve body; a valve stem, a bearing ring and a control member, wherein the valve stem is fixedly connected to the right upper end of a rotating rod, and a sliding groove is provided on the rear side of the valve stem; the bearing ring is sleeved outside the rotating rod at the lower side of the valve stem and fixedly connected to the safety valve body, a limiting ring is fixed on the top surface of the bearing ring and sleeved outside the rotating rod, the limiting ring is located at the lower side of the valve stem, and a plurality of clamping grooves are provided on the inner ring of the limiting ring; the control member comprises a slide plate and a clamping rod, the front end of the slide plate extends into the sliding groove, and a plurality of springs are connected to the front side of the sliding groove, the left part of the slide plate is provided with a sliding hole with the left end tilted backward, the lower end of the clamping rod is located in the clamping groove at the right end of the limiting ring, the upper end of the clamping rod sequentially penetrates the lower part of the valve stem, the sliding hole and the upper part of the valve stem, and the clamping rod and the valve stem are connected by sliding left and right. The utility model solves the problem that the valve stem is easily affected by external factors, resulting in the loosening of the rotating rod and the easy change of the opening of the valve stem.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline valves, in particular to a safety valve for a pressure pipeline. Background Art

[0002] Pressure pipeline is a special type of pipeline, which is designed to withstand internal or external pressure and is used to transport gas or liquid. These pipelines are very important in many industrial and civil facilities, including oil and gas transportation, chemical production, etc. Natural gas pipeline is a kind of pressure pipeline. Natural gas pipeline is equipped with safety valve, and the safety valve is generally equipped with valve stem (wrench). The valve stem is usually used to rotate the rotating rod of the safety valve to open or close the safety valve; however, after long-term use, the valve stem of the safety valve is easily affected by external factors, resulting in the loosening of the rotating rod, and the opening of the valve stem is easy to change, which in turn affects the opening of the safety valve.

[0003] Publication No. CN213900078U proposes a "natural gas pipeline safety valve". The device uses a locking mechanism to prevent the opening of the valve stem from changing. However, the safety valve needs to be operated with both hands when in use, which is inconvenient to use. Summary of the invention

[0004] The utility model aims to solve the problem that the valve stem is easily affected by external factors, resulting in the loosening of the rotating rod and the easy change of the opening of the valve stem. A safety valve for a pressure pipeline is provided, which can conveniently control the opening of the valve stem and conveniently limit the opening of the valve stem.

[0005] In order to solve the above problems, the technical solution of the utility model is:

[0006] A safety valve for a pressure pipeline comprises a safety valve body, on which a rotating rod is rotatably provided; it also comprises a valve stem, a bearing ring and a control member, wherein the valve stem is fixedly connected to the right part of the upper end of the rotating rod, and a sliding groove is provided on the rear side surface of the valve stem; the bearing ring is sleeved on the outside of the rotating rod at the lower side of the valve stem and is fixedly connected to the safety valve body, a limiting ring is fixed on the top surface of the bearing ring and sleeved on the outside of the rotating rod, the limiting ring is located on the lower side of the valve stem, and a plurality of clamping grooves are provided on the inner ring of the limiting ring; the control member comprises a slide plate and a clamping rod, the front end of the slide plate extends into the sliding groove, and a plurality of springs are connected to the front side surface of the sliding groove, the left part of the slide plate is provided with a sliding hole with the left end inclined backward, the lower end of the clamping rod is located in the clamping groove at the right end of the limiting ring, the upper end of the clamping rod passes through the lower part of the valve stem, the sliding hole and the upper part of the valve stem in sequence, and the clamping rod and the valve stem are slidably connected left and right.

[0007] Furthermore, the bearing ring is a circular ring with an inner diameter greater than the diameter of the rotating rod, half of the outer diameter of the bearing ring is smaller than the length of the valve stem, and the limiting ring and the bearing ring are coaxial.

[0008] Furthermore, a guide hole 1 connected to the slide groove is provided on the left portion of the top surface of the valve stem, and a guide hole 2 connected to the slide groove is provided on the left portion of the bottom surface of the valve stem. The guide hole 1 and the guide hole 2 are opposite to each other up and down, and the upper end of the clamping rod passes through the guide hole 2, the slide hole and the guide hole 1 in sequence. The outer peripheral walls of the clamping rod on the upper and lower sides of the valve stem are both sleeved and fixed with clamping rings, and the two clamping rings slide in contact with the upper and lower surfaces of the valve stem respectively.

[0009] Furthermore, the diameter of the clamping rod matches the width of the clamping slot, the sliding hole is an elongated hole, and the diameter of the clamping rod matches the widths of the first guide hole, the second guide hole and the sliding hole.

[0010] Furthermore, the right end of the sliding hole is located directly above the right end of the circular ring where the multiple slots are located. When the spring is in a natural state, the rear end of the slide plate extends out of the sliding slot, the locking rod is located in the right end of the sliding hole, and the lower end of the locking rod is located in the slot at the right end of the limiting ring.

[0011] Furthermore, when the slide plate moves forward to the limit state, the clamping rod is pressed by the rear side surface of the sliding hole to move leftward until the lower end of the clamping rod escapes from the clamping groove.

[0012] Through the above technical solution, the beneficial effects of the utility model are:

[0013] The utility model discloses that after the user grasps the valve stem and the slide plate with one hand and moves the slide plate toward the side of the slide groove connected to the spring, the restriction of the clamping groove on the valve stem by the clamping rod on the valve stem is released. At this time, the valve stem is controlled to drive the rotating rod to rotate, so as to control the opening of the safety valve body. After the user releases the palm, the clamping rod on the valve stem is limited by the clamping groove on the limit ring again under the restoring force of the spring, and the valve stem is limited and cannot rotate. Therefore, the utility model can limit the opening of the safety valve body.

[0014] The utility model can control and limit the opening of the safety valve body with only one hand, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 It is a structural schematic diagram of the connection between the valve stem, the load-bearing ring and the control member of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the slide connecting rod of the utility model.

[0018] Figure 4 It is a sectional top view of the control member connected to the valve stem of the utility model;

[0019] Figure 5 yes Figure 4 Cross-sectional view at AA in the middle.

[0020] The numbers in the attached figure are: 1. safety valve body, 2. rotating rod, 3. valve stem, 4. load ring, 5. slide groove, 6. limit ring, 7. clamping groove, 8. slide plate, 9. clamping rod, 10. spring, 11. slide hole, 12. guide hole one, 13. guide hole two, 14. clamping ring, 15. flange. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments:

[0022] like Figure 1 to Figure 5 As shown, a safety valve for a pressure pipeline includes a safety valve body 1, the front and rear ends of the safety valve body 1 are both provided with flanges 15, a rotating rod 2 is rotatably provided on the safety valve body 1, and the safety valve body is controlled to be opened or closed when the rotating rod 2 rotates; it also includes a valve stem 3, a load-bearing ring 4 and a control member, the valve stem 3 is a horizontally arranged rectangular plate, the valve stem 3 is fixedly connected to the upper right part of the rotating rod 2, the rear side surface of the valve stem 3 is provided with a slide groove 5, and the slide groove 5 is a U-shaped groove with an opening facing backwards; the load-bearing ring 4 is sleeved outside the rotating rod 2 on the lower side of the valve stem 3, and the bottom surface is fixedly connected to the safety valve body 1, and the top surface of the load-bearing ring 4 is fixed with a limit ring 6 sleeved outside the rotating rod 2, and the limit ring 6 has an outer diameter of the same as that of the load-bearing ring 4. The limiting ring 6 is a circular ring with equal outer diameter, and is located at the lower side of the valve stem 3. A plurality of slots 7 are arranged on the inner ring of the limiting ring 6. The slots 7 are U-shaped slots with their openings facing the center of the limiting ring 6, and the upper and lower ends of the slots 7 pass through the upper and lower surfaces of the limiting ring 6; the control member comprises a slide plate 8 and a clamping rod 9, and the slide plate 8 is a rectangular plate that slides in contact with the slide groove 5. The front end of the slide plate 8 extends into the slide groove 5, and is connected to the front side of the slide groove 5 with a plurality of springs 10. The left part of the slide plate 8 is provided with a sliding hole 11 with its left end tilted backwards. The clamping rod 9 is a round rod body, and the lower end of the clamping rod 9 is located in the slot 7 at the right end of the limiting ring 6, and the upper end of the clamping rod 9 passes through the lower part of the valve stem 3, the sliding hole 11 and the upper part of the valve stem 3 in sequence, and the clamping rod 9 and the valve stem 3 are connected for left-right sliding.

[0023] The load-bearing ring 4 is a circular ring with an inner diameter greater than the diameter of the rotating rod 2 , half of the outer diameter of the load-bearing ring 4 is less than the length of the valve stem 3 , the limit ring 6 and the load-bearing ring 4 are coaxial, and the inner diameter of the limit ring 6 is greater than the inner diameter of the load-bearing ring 4 .

[0024] A guide hole 12 connected to the slide groove 5 is provided on the left side of the top surface of the valve stem 3, and a guide hole 2 13 connected to the slide groove 5 is provided on the left side of the bottom surface of the valve stem 3. The guide hole 12 and the guide hole 2 13 are opposite to each other up and down. The guide hole 12 and the guide hole 2 13 are both strip holes arranged along the length direction of the valve stem 3. The upper end of the clamping rod 9 passes through the guide hole 2 13, the slide hole 11 and the guide hole 12 in sequence. The outer peripheral walls of the clamping rod 9 on the upper and lower sides of the valve stem 3 are both sleeved and fixed with clamping rings 14, and the two clamping rings 14 slide in contact with the upper and lower surfaces of the valve stem 3 respectively.

[0025] The diameter of the clamping rod 9 matches the width of the clamping slot 7, the sliding hole 11 is a long strip hole, the diameter of the clamping rod 9 matches the widths of the guide hole 12, the guide hole 2 13 and the sliding hole 11, and the clamping ring 14 is a circular ring with an outer diameter greater than the width of the guide hole 12.

[0026] The right end of the sliding hole 11 is located directly above the right end of the circular ring where the multiple slots 7 are located. When the spring 10 is in a natural state, the rear end of the slide plate 8 extends out of the sliding slot 5, the clamping rod 9 is located in the right end of the sliding hole 11, and the lower end of the clamping rod 9 is located in the slot 7 at the right end of the limit ring 6.

[0027] When the slide plate 8 moves forward to the limit state, the clamping rod 9 is pressed by the rear side surface of the sliding hole 11 to move to the left until the lower end of the clamping rod 9 escapes from the clamping groove 7.

[0028] When in use, both ends of the safety valve body 1 are connected to the pressure pipeline via the flange 15. In the initial state, the lower end of the clamping rod 9 is located in the corresponding clamping groove 7, and the valve stem 3 cannot drive the rotating rod 2 to rotate; when the rotating rod 2 needs to be rotated, the user holds the valve stem 3 with one hand, and the remaining four fingers except the thumb hold the slide plate 8 and extend it out of one end of the slide groove 5, so that the slide plate 8 moves forward, and the spring 10 is compressed. When the slide plate 8 moves forward, since the left end of the slide hole 11 tilts backward, when the slide hole 11 moves forward with the slide plate 8, the rear side of the slide hole 11 presses the clamping rod 9, so that the clamping rod 9 moves along the length of the guide hole 12 and the guide hole 2 13. The valve stem 3 then moves in the direction of the rotating rod 2 until the lower end of the clamping rod 9 escapes from the clamping groove 7 and the clamping rod 9 is no longer limited by the clamping groove 7. At this time, the valve stem 3 drives the rotating rod 2 to rotate, and the clamping rod 9 rotates with the valve stem 3. After the safety valve body 1 reaches the required opening, the user releases the valve stem 3 with his palm. Under the restoring force of the spring 10, the slide plate 8 returns to the initial state, and the front side of the sliding hole 11 presses the clamping rod 9 to move in the direction away from the rotating rod 2 until the clamping rod 9 is located in the right end of the sliding hole 11. At this time, the lower end of the clamping rod 9 is located in the clamping groove 7 just below the right end of the sliding hole 11, and the valve stem 3 is limited again and cannot rotate.

[0029] The preferred implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings; however, the present invention is not limited to the above-mentioned embodiments. Without violating the spirit of the present invention, i.e., the disclosure scope, any equivalent or equivalent deformation or replacement of the technical solution of the present invention shall fall within the protection scope of the present invention.

Claims

1. A safety valve for a pressure pipeline, comprising a safety valve body (1), wherein a rotating rod (2) is rotatably provided on the safety valve body (1); characterized in that: It also includes a valve stem (3), a bearing ring (4) and a control member, wherein the valve stem (3) is fixedly connected to the upper right portion of the rotating rod (2), and a slide groove (5) is provided on the rear side of the valve stem (3); the bearing ring (4) is sleeved outside the rotating rod (2) on the lower side of the valve stem (3) and is fixedly connected to the safety valve body (1); a limiting ring (6) is fixed on the top surface of the bearing ring (4) and sleeved outside the rotating rod (2); the limiting ring (6) is located on the lower side of the valve stem (3), and a plurality of slots are provided on the inner ring of the limiting ring (6) (7); the control member comprises a slide plate (8) and a clamping rod (9); the front end of the slide plate (8) extends into the slide groove (5) and is connected to the front side of the slide groove (5) by a plurality of springs (10); the left portion of the slide plate (8) is provided with a sliding hole (11) with the left end tilted backward; the lower end of the clamping rod (9) is located in the clamping groove (7) at the right end of the limit ring (6); the upper end of the clamping rod (9) passes through the lower part of the valve stem (3), the sliding hole (11) and the upper part of the valve stem (3) in sequence; the clamping rod (9) and the valve stem (3) are connected by sliding left and right.

2. A safety valve for a pressure pipeline according to claim 1, characterized in that: The bearing ring (4) is a circular ring having an inner diameter greater than the diameter of the rotating rod (2); half of the outer diameter of the bearing ring (4) is less than the length of the valve stem (3); and the limiting ring (6) and the bearing ring (4) are coaxial.

3. A safety valve for a pressure pipeline according to claim 1, characterized in that: A guide hole 1 (12) communicating with the slide groove (5) is provided on the left portion of the top surface of the valve stem (3), and a guide hole 2 (13) communicating with the slide groove (5) is provided on the left portion of the bottom surface of the valve stem (3). The guide hole 1 (12) and the guide hole 2 (13) are opposed to each other in upper and lower directions. The upper end of the clamping rod (9) passes through the guide hole 2 (13), the slide hole (11) and the guide hole 1 (12) in sequence. The outer peripheral walls of the clamping rod (9) on the upper and lower sides of the valve stem (3) are both sleeved and fixed with clamping rings (14). The two clamping rings (14) are respectively in sliding contact with the upper and lower surfaces of the valve stem (3).

4. A safety valve for a pressure pipeline according to claim 3, characterized in that: The diameter of the clamping rod (9) matches the width of the clamping groove (7); the sliding hole (11) is a long strip hole; the diameter of the clamping rod (9) matches the widths of the guide hole 1 (12), the guide hole 2 (13) and the sliding hole (11).

5. A safety valve for a pressure pipeline according to claim 4, characterized in that: The right end of the slide hole (11) is located directly above the right end of the circular ring where the plurality of slots (7) are located. When the spring (10) is in a natural state, the rear end of the slide plate (8) extends out of the slide slot (5), the latch rod (9) is located in the right end of the slide hole (11), and the lower end of the latch rod (9) is located in the slot (7) at the right end of the limiting ring (6).

6. A safety valve for a pressure pipeline according to claim 5, characterized in that: When the slide plate (8) moves forward to the limit state, the clamping rod (9) is pressed by the rear side of the slide hole (11) to move leftward until the lower end of the clamping rod (9) escapes from the clamping groove (7).

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