Gas pipeline valve with good sealing performance

Abstract

The utility model discloses a valve with good sealing performance for a gas pipeline. The valve comprises a valve body, an external pipeline I and an external pipeline II are respectively connected to two ends of the valve body; the upper end of the valve body is connected with a hollow valve column, a valve rod is rotatably arranged in the hollow valve column, the lower end of the valve rod extends into the valve body and is provided with a valve plate, and the upper end extends out of the hollow valve column and is provided with a hand wheel; sealing assemblies are arranged on the two sides of the hollow valve rod; connecting assemblies are arranged between the first pipeline and the valve body and between the second pipeline and the valve body. The rubber block is arranged at the joint of the valve rod and the hollow valve rod, so that a gap can be blocked, and the sealing performance is prevented from being influenced by gas leakage of the gap; the tooth groove and the tooth-shaped ring are additionally arranged at the joint of the valve and the gas pipeline, so that the valve and the gas pipeline cannot relatively deflect, the joint is not prone to deformation or slipping and the like after being used for a long time, and the sealing performance is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas fittings, in particular to a valve for gas pipelines with good sealing performance. Background Technique

[0002] A gas valve is a new type of safety supporting device for gas pipeline projects; it is used to cut off, connect, and regulate the gas in the pipeline, and has good control characteristics and closing and sealing performance; it is applicable to various gas medium pipelines such as city gas, liquefied petroleum gas, natural gas, and oxygen.

[0003] Under long-term use, gaps will be generated at the valve stem of the valve due to friction, resulting in slight leakage of gas. In severe cases, the gas density in the room will rise, posing a potential risk of fire and explosion; in addition, the valve needs to be connected to the gas pipeline. In the prior art, by adding a metal threaded head at the end of the pipeline and then connecting it with a nut, a relatively stable connection effect can be achieved. However, under long-term use, due to the influence of metal rust, thread friction, etc., its sealing performance will be affected, and there is room for improvement. Content of the Utility Model

[0004] The utility model aims to solve the technical problem in the prior art that the sealing performance of the gas valve needs to be improved, and provides a valve for gas pipelines with good sealing performance.

[0005] To solve the above technical problems, the technical solution provided by the utility model is: a valve for gas pipelines with good sealing performance, including a valve body; an externally connected pipeline 1 and pipeline 2 are respectively connected to both ends of the valve body; a hollow valve column is connected to the upper end of the valve body, a valve stem is rotatably arranged in the hollow valve column, the lower end of the valve stem extends into the valve body to be provided with a valve plate, and the upper end extends out of the hollow valve column to be provided with a handwheel;

[0006] Sealing components are arranged on both sides of the hollow valve column. The sealing components include mounting plates arranged on both sides of the hollow valve column. Accommodation grooves are arranged on the mounting plates. Threaded rods are rotatably arranged in the accommodation grooves. One end of the threaded rod extends out of the mounting plate to be provided with a turning knob; a nut block is threadedly connected to the outer side of the threaded rod. An L-shaped connecting rod is arranged on the nut block. Rubber blocks are arranged at the mutually close ends of the connecting rods;

[0007] Connection components are arranged between the pipeline 1, pipeline 2 and the valve body. The connection components include a flange 1 arranged at the end of the pipeline 1 or pipeline 2, and a flange 2 arranged at the end of the valve body; the inner side of the flange 1 is a limit tooth groove, and a tooth-shaped ring capable of cooperating with the limit tooth groove is arranged on the flange 2.

[0008] Preferably, the mounting plates are both L-shaped and are fixedly connected to both sides of the hollow valve column.

[0009] Preferably, a round hole communicating with the accommodating groove is provided on the side surface of the mounting plate, and the threaded rod is rotatably connected to the round hole; one end of the threaded rod away from the rotary knob is rotatably connected to the inner side of the accommodating groove.

[0010] Preferably, the inner side surfaces of the rubber blocks are all semi-cylindrical.

[0011] Preferably, an annular sealing gasket is provided between the first flange and the second flange, and the first flange and the second flange are connected by a plurality of bolts.

[0012] Preferably, the lower ends of the rubber blocks are all in contact with the hollow valve stem, and the inner side surfaces are all in contact with the valve rod.

[0013] The advantages of the present utility model compared with the prior art are as follows: Rubber blocks are provided at the connection between the valve rod and the hollow valve stem, which can block the gaps and prevent air leakage from the gaps, affecting its sealing performance; Tooth grooves and toothed rings are added at the connection between the valve and the gas pipeline, so that relative deflection cannot occur, and thus the connection is not easily deformed or slipped after long-term use, further improving the sealing performance. Description of the Drawings

[0014] Figure 1 is a structural schematic diagram of the present utility model.

[0015] Figure 2 is a structural schematic diagram of the connection assembly of the present utility model.

[0016] Figure 3 is a structural schematic diagram of the rubber block of the present utility model.

[0017] Figure 4 is the present utility model Figure 1 The enlarged view at A in.

[0018] As shown in the figure: 1. Valve body, 2. Pipe 1, 3. Pipe 2, 4. Hollow valve stem, 5. Valve rod, 6. Handwheel, 7. Mounting plate, 8. Accommodating groove, 9. Threaded rod, 10. Rotary knob, 11. Nut block, 12. Connecting rod, 13. Rubber block, 14. First flange, 15. Second flange, 16. Sealing gasket, 17. Limit tooth groove, 18. Toothed ring. Detailed Description of the Invention

[0019] The following further describes the present utility model in detail with reference to the drawings.

[0020] Example 1, in combination with the attached Figure 1, A valve for gas pipelines with good sealing performance, comprising a valve body 1; an externally connected pipeline 1 and pipeline 2 are respectively connected to both ends of the valve body 1 for gas transmission; a hollow valve column 4 is connected to the upper end of the valve body 1, a valve rod 5 is rotatably arranged inside the hollow valve column 4, the lower end of the valve rod 5 extends into the valve body 1 to be provided with a valve plate, and the upper end extends out of the hollow valve column 4 to be provided with a handwheel 6; during use, rotate the handwheel 6, drive the valve plate below to rotate through the valve rod 5, and the opening and closing of the valve can be completed.

[0021] Combined with the attached Figure 1 , 3 , 4, sealing components are provided on both sides of the hollow valve column 4. The sealing components include mounting plates 7 provided on both sides of the hollow valve column 4. The mounting plates 7 are all L-shaped and are fixedly connected to both sides of the hollow valve column 4. The L-shape increases the connection area and makes the installation more stable. Accommodation grooves 8 are provided on the mounting plates 7, threaded rods 9 are rotatably arranged in the accommodation grooves 8, one end of each threaded rod 9 extends out of the mounting plate 7 to be provided with a turning knob 10 for facilitating the rotation of the threaded rod 9; a nut block 11 is threadedly connected to the outer side of the threaded rod 9, an L-shaped connecting rod 12 is provided on the nut block 11, rubber blocks 13 are provided at the mutually approaching ends of the connecting rods 12, the inner sides of the rubber blocks 13 are all semi-cylindrical and conform to the shape of the valve rod 5; the lower ends of the rubber blocks 13 are all in contact with the hollow valve column 4, and the inner sides are all in contact with the valve rod 5. The cross-sections of the rubber blocks 13 are all right-angled trapezoids, so that the bottom area is larger, which can increase the contact area with the hollow valve column 4, be tightly squeezed, and improve the sealing performance.

[0022] Combined with the attached Figure 1 , a circular hole communicating with the accommodation groove 8 is provided on the side of the mounting plate 7, and the threaded rod 9 is rotatably connected to the circular hole; one end of the threaded rod 9 away from the turning knob 10 is rotatably connected to the inner side of the accommodation groove 8, so that the threaded rod 9 can freely rotate in the accommodation groove 8.

[0023] Combined with the attached Figure 1 , 2 , connection components are provided between the pipeline 1, pipeline 2 and the valve body 1. The connection components include a flange 14 provided at the end of the pipeline 1 or pipeline 2, a flange 15 is provided at the end of the valve body 1, an annular sealing gasket 16 is provided between the flange 14 and the flange 15 to avoid wear caused by rigid connection, and the flange 14 and the flange 15 are connected by a plurality of bolts; a limit tooth groove 17 is provided inside the flange 14, and a tooth-shaped ring 18 that can cooperate with the limit tooth groove 17 is provided on the flange 15, so that the flange 14 cannot deflect relative to the flange 15.

[0024] Working principle of the utility model: First, the valve body 1 is connected to the first pipeline 2 and the second pipeline 3. When connecting, the toothed ring 18 is correspondingly inserted into the limit tooth groove 17 so that their tooth shapes correspond to each other. Thus, the circumferential deflection between the first pipeline 2 or the second pipeline 3 and the valve body 1 is restricted, and the connection firmness is increased. At this time, the sealing gasket 16 is located between the first flange 14 and the second flange 15, and the first flange 14 and the second flange 15 can be installed and fixed by bolts.

[0025] Rotate the knob 10 to drive the threaded rod 9 to rotate, so as to drive the rubber block 13 to move towards each other through the nut block 11 and the connecting rod 12, and extrude on the outside of the valve stem 5, thereby blocking the gap between the valve stem 5 and the hollow valve column 4, and further increasing the sealing performance.

[0026] The above describes the utility model and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the utility model, and the actual structure is not limited thereto. All in all, if those of ordinary skill in the art are inspired by it and without departing from the creative concept of the utility model, without creative design, the structural manners and embodiments similar to the technical solution should fall within the protection scope of the utility model.

Claims

1. A valve for a gas pipeline with good sealing performance, comprising a valve body (1); characterized in that: The externally connected pipe one (2) and pipe two (3) are respectively connected to both ends of the valve body (1); a hollow valve stem (4) is connected to the upper end of the valve body (1), a valve rod (5) is rotatably arranged inside the hollow valve stem (4), the lower end of the valve rod (5) extends into the valve body (1) to be provided with a valve plate, and the upper end extends out of the hollow valve stem (4) to be provided with a handwheel (6); Sealing assemblies are arranged on both sides of the hollow valve stem (4), each sealing assembly includes mounting plates (7) arranged on both sides of the hollow valve stem (4), accommodation grooves (8) are arranged on the mounting plates (7), threaded rods (9) are rotatably arranged inside the accommodation grooves (8), and one end of each threaded rod (9) extends out of the mounting plate (7) to be provided with a turning knob (10); a nut block (11) is threadedly connected to the outer side of the threaded rod (9), an L-shaped connecting rod (12) is arranged on the nut block (11), and rubber blocks (13) are arranged at the ends of the connecting rods (12) close to each other; Connection assemblies are arranged between the pipe one (2), the pipe two (3) and the valve body (1), each connection assembly includes a flange one (14) arranged at the end of the pipe one (2) or the pipe two (3), and a flange two (15) is arranged at the end of the valve body (1); a limiting tooth groove (17) is arranged on the inner side of the flange one (14), and a tooth-shaped ring (18) capable of cooperating with the limiting tooth groove (17) is arranged on the flange two (15).

2. The valve for a gas pipeline with good sealing performance according to claim 1, characterized in that: The mounting plates (7) are all L-shaped and are fixedly connected to both sides of the hollow valve stem (4).

3. A valve for a gas pipeline with good sealing performance according to claim 1, characterized in that: A round hole communicating with the accommodation groove (8) is arranged on the side surface of the mounting plate (7), and the threaded rod (9) is rotatably connected to the round hole; the end of the threaded rod (9) away from the turning knob (10) is rotatably connected to the inner side of the accommodation groove (8).

4. A valve for a gas pipeline with good sealing performance according to claim 1, characterized in that: The inner sides of the rubber blocks (13) are all semi-cylindrical.

5. The valve for a gas pipeline with good sealing performance according to claim 1, characterized in that: An annular sealing gasket (16) is arranged between the flange one (14) and the flange two (15), and the flange one (14) and the flange two (15) are connected by a plurality of bolts.

6. The valve for a gas pipeline with good sealing performance according to claim 1, characterized in that: The lower ends of the rubber blocks (13) are all in contact with the hollow valve stem (4), and the inner sides are all in contact with the valve rod (5).

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