CN221762769U - Inflatable sealing type gas valve packing gland - Google Patents

Abstract

The utility model belongs to the field of chemical equipment, and relates to an inflatable sealing type gas valve packing gland, which comprises a valve body, a valve rod, packing and a packing gland, wherein the packing gland is fixedly connected to the valve body, a counter bore is arranged in the center of the upper end of the packing gland, a gasket matched with the valve rod is arranged in the counter bore, and the upper end of the counter bore is fixedly connected with a gland upper cover corresponding to the counter bore; the gasket is an inflatable gasket, the gasket is provided with an inflation nozzle, and the gland is provided with a through hole for the inflation nozzle to extend out. According to the utility model, the sealing effect of the valve is ensured by adding a layer of sealing structure, and the valve is protected from corrosion; after sealing, the gas is prevented from escaping, and the effective utilization of the productivity is ensured; the risk is reduced, the safety of staff is ensured, the occurrence of safety accidents is reduced, the packing is not required to be replaced, the labor intensity is reduced, and the energy conservation and consumption reduction are realized.

Description

Inflatable sealing type gas valve packing gland

Technical Field

The utility model belongs to the field of chemical equipment and relates to an inflatable sealing type gas valve packing gland.

Background Art

Gas valves are widely used in coking plants. They are an important part of chemical pipelines and a pipeline component that must be installed to ensure safe production. Their functions are: to open and close the fluid in the pipeline; to adjust the pressure and flow of the pipeline; to control the flow direction of the medium in the pipeline; and to protect the safety of the pipeline and equipment.

During the long-term use of traditional gas valves, due to frequent switching, the packing filler is squeezed and damaged for a long time, which will cause gas to escape from the damaged parts of the gland and the packing. Long-term leakage is easy to cause valve corrosion, which will not only cause certain harm to the health of employees, but also pose certain safety risks, easily causing gas poisoning to employees, and even fire or explosion and other safety accidents. The risk of replacing the packing is relatively high, and frequent replacement increases the cost of consumables and increases the workload of employees. Chinese patent CN215635332U discloses a valve packing gland and a valve mechanism, including a valve packing gland, a packing group, a valve stem and a valve cover; the valve cover is provided with a second through hole; the packing group is placed in the valve cover, and the end of the packing gland body away from the groove is connected to the valve cover and pressed on the packing group, and the valve stem is sequentially inserted into the groove, the first through hole, the packing group and the second through hole; when the gasket gland presses the gasket, the two ends of the gasket are respectively sealed with the groove and the valve stem. When the gasket gland presses the gasket, an interference fit is formed between the gasket gland, the groove and the valve stem, and the packing gland can effectively stop leakage.

The prior art has the following technical defects:

The gasket in the above technical solution is used for emergency sealing in case of leakage. If the gasket is to play a sealing role, it is necessary to tighten the gasket cover by tightening the gasket to deform it and fit tightly with the side of the packing cover. Since the gasket cover and the packing cover are threadedly connected, the side wall of the packing cover in contact with the gasket is provided with threads. After the gasket is deformed and sealed many times, the gasket and the threads rub repeatedly, causing gasket loss, thereby affecting the sealing effect.

Utility Model Content

The technical problem to be solved by the utility model is to overcome the shortcomings of the prior art and provide an inflatable sealing type gas valve packing gland.

The utility model discloses an inflatable sealing type gas valve packing gland, comprising a valve body, a valve stem, a packing and a packing gland. The packing gland is fixedly connected to the valve body. A countersunk hole is provided at the center of the upper end of the packing gland. A gasket matched with the valve stem is provided in the countersunk hole. A gland upper cover corresponding to the countersunk hole is fixedly connected to the upper end of the countersunk hole. The gasket is an inflatable gasket, an inflating nozzle is provided on the gasket, and a through hole for the inflating nozzle to extend is provided on the gland.

Working process or working principle:

When in use, place the packing in the valve body, then fix the packing gland on the valve body to seal the packing, then install the inflatable gasket in the countersunk hole on the packing gland and fix the gland cover, finally inflate the gasket through the inflation nozzle to keep a certain air pressure inside the gasket and fit tightly with the side of the packing gland, the bottom of the gland cover and the surface of the valve stem to block the path of gas escape, thereby achieving a double-layer sealing effect.

The packing gland is fixedly connected to the valve body by bolts, so that there is no relative movement between the packing gland and the valve body.

The gland upper cover and the packing gland are fixedly connected by bolts, so that there is no relative movement between the gland upper cover and the packing gland.

The gasket is an O-type pneumatic sealing ring, which is expanded by inflating and closely fits with the side surface of the packing gland, the bottom surface of the gland cover and the surface of the valve stem.

The gasket is a rectangular inflatable sealing ring adapted to the countersunk hole size, so that the four faces of the rectangular gasket are in contact with the side of the packing gland, the bottom of the gland cover and the surface of the valve stem respectively, and then the contact is made tighter by inflation.

The inflation nozzle is provided with a connecting thread, which can stabilize the connecting port when the gasket is inflated, which is convenient and quick.

Compared with the prior art, the beneficial effects of the utility model are:

The utility model ensures the sealing effect of the valve by adding a layer of sealing structure, protects the valve from corrosion; after sealing, gas leakage is prevented, and effective utilization of production capacity is ensured; risks are reduced, employee safety is ensured, and the occurrence of safety accidents is reduced; at the same time, there is no need to replace the packing, which reduces labor intensity and achieves energy saving and consumption reduction.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the assembly structure of Example 1 of the utility model,

FIG. 2 is a schematic diagram of the assembly structure of Example 2 of the present utility model.

In the figure: 1. valve stem; 2. gland cover; 3. countersunk hole; 4. packing gland; 5. valve body; 6. packing; 7. gasket; 8. inflation nozzle.

DETAILED DESCRIPTION

Example 1

As shown in Figure 1, the inflatable sealing type gas valve packing gland of the utility model comprises a valve body 5, a valve stem 1, a packing 6 and a packing gland 4. The packing gland 4 is fixedly connected to the valve body 5. A countersunk hole 3 is provided at the center of the upper end of the packing gland 4. A gasket 7 adapted to the valve stem 1 is provided in the countersunk hole 3. A gland cover 2 corresponding to the countersunk hole 3 is fixedly connected to the upper end of the countersunk hole 3. The gasket 7 is an inflatable gasket 7. An inflating nozzle 8 is provided on the gasket 7. A through hole for the inflating nozzle 8 to extend is provided on the gland cover 2. The packing gland 4 and the valve The body 5 is fixedly connected by bolts, so that there is no relative movement between the packing gland 4 and the valve body 5; the gland cover 2 and the packing gland 4 are fixedly connected by bolts, so that there is no relative movement between the gland cover 2 and the packing gland 4; the gasket 7 is an O-type inflatable sealing ring, which is expanded by inflating the O-type inflatable sealing ring and tightly fits with the side of the packing gland 4, the bottom of the gland cover 2 and the surface of the valve stem 1; the inflation nozzle 8 is provided with a connecting thread, which can stabilize the connection port when the gasket 7 is inflated, which is convenient and quick.

Working process or working principle:

When in use, the packing 6 is placed in the valve body 5, and then the packing gland 4 is fixed on the valve body 5 to seal the packing 6. Then, the inflatable gasket 7 is installed in the countersunk hole 3 on the packing gland 4 and the gland upper cover 2 is fixed. Finally, the gasket 7 is inflated through the inflation nozzle 8. By inflating the O-ring, it expands and fits tightly with the side of the packing gland 4, the bottom of the gland upper cover 2 and the surface of the valve stem 1. A certain air pressure is maintained inside the gasket 7 to block the path for gas escape, thereby achieving a double-layer sealing effect.

The utility model ensures the sealing effect of the valve by adding a layer of sealing structure, protects the valve from corrosion, prevents gas leakage after sealing, ensures effective utilization of production capacity, reduces risks, ensures employee safety, and reduces the occurrence of safety accidents. At the same time, there is no need to replace the packing 6, reduces labor intensity, and achieves energy saving and consumption reduction.

Example 2

As shown in FIG2 , different from Example 1, the gasket 7 described in this embodiment is a rectangular inflatable sealing ring adapted to the size of the countersunk hole 3, so that the four faces of the rectangular gasket 7 are respectively in contact with the side surface of the packing gland 4, the bottom surface of the gland upper cover 2 and the surface of the valve stem 1, and then inflation is used to make the contact closer. Its working principle and effect are the same as those of Example 1.

The description of the direction and relative position relationship of the structure in the present invention, such as the description of front, back, left, right, up, and down, does not constitute a limitation of the present invention, but is only for the convenience of description.

Claims (6)

1. The utility model provides an aerify sealed gas valve packing gland, includes valve body (5), valve rod (1), packing (6) and packing gland (4), its characterized in that: the packing gland (4) is fixedly connected to the valve body (5), a counter bore (3) is formed in the center of the upper end of the packing gland (4), a gasket (7) matched with the valve rod (1) is arranged in the counter bore (3), and the upper end of the counter bore (3) is fixedly connected with a gland upper cover (2) corresponding to the counter bore (3);

The gasket (7) is an inflatable gasket, the gasket (7) is provided with an inflation nozzle (8), and the gland upper cover (2) is provided with a through hole for the inflation nozzle (8) to extend.

2. The gas-filled sealing gas valve packing gland of claim 1, wherein: the packing gland (4) is fixedly connected with the valve body (5) through bolts.

3. The gas-filled sealing gas valve packing gland of claim 2, wherein: the gland upper cover (2) is fixedly connected with the packing gland (4) through bolts.

4. A gas-filled sealing gas valve packing gland according to claim 3, wherein: the gasket (7) is an O-shaped inflatable sealing ring.

5. A gas-filled sealing gas valve packing gland according to claim 3, wherein: the gasket (7) is a rectangular inflatable sealing ring with the size matched with that of the counter bore (3).

6. The gas-filled sealing gas valve packing gland according to any one of claims 1-5, wherein: the charging connector (8) is provided with connecting threads.