CN219734228U - A special bellows stop valve for chlorine gas - Google Patents

Abstract

The utility model relates to the technical field of stop valves, in particular to a special corrugated pipe stop valve for chlorine, which comprises a valve body, wherein the upper end of the valve body is fixedly connected with a valve cover, the middle part of the valve cover is penetrated and movably connected with a valve rod, the joint of the valve body and the valve cover is provided with a sealing gasket, the bottom end of the valve rod is fixedly connected with a valve core, the valve core is positioned above a valve seat, the top end of the valve rod is fixedly connected with a hand wheel, the middle part of an outer ring of the valve rod is provided with a pressing plate, a filling material is arranged below the pressing plate, a corrugated pipe is arranged below the filling material, and the upper end and the lower end of the corrugated pipe are respectively provided with two sealing mechanisms.

Description

A special bellows stop valve for chlorine gas

Technical field

The utility model relates to the technical field of stop valves, specifically a bellows stop valve special for chlorine gas.

Background technique

Special stop valves for chlorine are mainly used in the chemical industry for chlorine and liquid chlorine working conditions in chlor-alkali chemical companies, as well as on the pipelines of companies using chlorine and liquid chlorine to connect or control the flow of media. Currently, this type of stop valve in China has the standards of the Chlorine Association. and national standards. However, this standard valve is not suitable under certain working conditions and may cause problems such as leakage, corrosion, short service life, and cumbersome installation. The existing bellows stop valve has no inner cavity in the valve cover, and the bellows is only installed in the valve body cavity. Therefore, the bellows is short, has few sections, has a small expansion coefficient, and is easily damaged, causing medium leakage; and the upper part of the valve stem and the valve body The middle part of the body is also prone to leakage. The leaking flammable and explosive medium is prone to fire or explosion. During the process, it is impacted by the medium, and the solid impurities and crystals in the medium are mixed in the gap of the bellows. During the opening process of the valve, the bellows is damaged. And reduce the service life of the valve.

According to the public patent number CN201934783U, a special bellows stop valve for chlorine gas includes a valve body. The valve body is provided with a valve cover, which is fixed by bolts and tightened by nuts; the valve disc is installed at the lower end of the valve stem and connected with the valve. The body sealing surface is in contact with the seal, and the upper end of the valve cover is provided with a handwheel, which is fixed by connecting the cap; a sealing bowl is provided between the valve body and the valve cover, and carbon essence is provided between the sealing bowl and the valve body. There is a bellows in the inner cavity of the valve cover and is fixed on the sealing bowl. The packing is installed in the groove formed between the middle part of the valve cover and the valve stem. It is fixed on the packing port through the pressure plate. The upper end of the valve stem is provided with a bellows. There is a positioning piece fixed by a positioning pin; a composite pad is provided between the sealing bowl and the valve body; a valve mother is provided between the valve cover and the valve stem and is installed at the lower end of the handwheel. However, this sealing method will cause the sealing structure to deflect when the valve stem moves up and down, creating a gap at the connection, allowing chlorine gas to leak.

In view of this, we propose a special bellows stop valve for chlorine.

Utility model content

In order to make up for the above shortcomings, the utility model provides a special bellows stop valve for chlorine gas.

The technical solution of this utility model is:

A special bellows stop valve for chlorine gas, characterized by: including a valve body, a valve cover is fixedly connected to the upper end of the valve body, a valve stem is movably connected through the middle of the valve cover, and a valve seat is fixedly connected to the inside of the valve body. .

As a preferred technical solution, a sealing gasket is provided at the connection between the valve body and the valve cover.

As a preferred technical solution, a valve core is fixedly connected to the bottom end of the valve stem, the valve core is located above the valve seat, and a handwheel is fixedly connected to the top end of the valve stem.

As a preferred technical solution, the upper end of the valve cover is fixedly connected to a gland, and the front and rear sides of the gland are fixedly connected to brackets. The valve stem penetrates the valve cover, the gland and the middle of the bracket.

As a preferred technical solution, a pressure plate is provided in the middle of the outer ring of the valve stem, a filling material is provided below the pressure plate, a bellows is provided below the filling material, and two sealing mechanisms are provided at the upper and lower ends of the bellows.

As a preferred technical solution, the sealing mechanism includes a limit seat, and two limit grooves are symmetrically provided inside each limit seat. A fixed gasket is fixedly connected to the bottom of the limit groove. The fixed gasket A spring is fixedly connected to the outer end of the spring. A sliding gasket is fixedly connected to the outer end of the spring. The lower end of the sliding gasket is provided with a transition slope. A sealing block is slidingly connected to the slope. The sealing block is fixedly connected to the valve stem. .

As a preferred technical solution, the left and right ends of the valve body are respectively provided with air outlets and air inlets.

Compared with the existing technology, the beneficial effects of this utility model are:

1. This utility model sets sealing mechanisms on the upper and lower ends of the bellows so that the gasket is always close to the stem during the movement of the valve stem. The sealing effect is better. At the same time, the bellows is separated from the chlorine gas, which reduces the possibility of chlorine gas leakage and protects the valve at the same time. Bellows are not corroded.

Description of the drawings

Figure 1 is a front view of the overall structure of the utility model;

Figure 2 is a side view of the overall structure of the utility model;

Figure 3 is a front cross-sectional view of the overall structure of the utility model;

Figure 4 is a schematic structural diagram of the sealing mechanism of the present utility model.

In the picture: 1. Valve body; 2. Valve cover; 3. Valve core; 4. Valve stem; 5. Hand wheel; 6. Filling material; 7. Pressure plate; 8. Sealing mechanism; 801, limit seat; 802. Limit groove; 803, fixed gasket; 804, spring; 805, sliding gasket; 9, sealing gasket; 10, gland; 11, air outlet; 12, air inlet; 13, bracket; 14, bellows ; 15. Valve seat; 16. Sealing block.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

In order to facilitate understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are shown in the drawings. However, the present invention may be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when an element is referred to as being "mounted" on another element, it can be directly on the other element or intervening elements may also be present. When an element is said to be "connected" to another element, it can be directly connected to the other element or there may also be intervening elements present. The terms "vertical," "horizontal," "left," "right," and similar expressions are used herein for illustrative purposes only.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which the invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Please refer to Figures 1-4. This utility model provides a technical solution:

A special bellows stop valve for chlorine gas, which is characterized by: including a valve body 1, a valve cover 2 is fixedly connected to the upper end of the valve body 1, a valve stem 4 is movably connected through the middle of the valve cover 2, and a valve seat is fixedly connected to the inside of the valve body 1 15.

It should be added that the connection between the valve stem 4 and the valve body is provided with sealing measures.

As a preferred embodiment of this embodiment, a sealing gasket 9 is provided at the connection between the valve body 1 and the valve cover 2 .

As a preferred embodiment of this embodiment, the bottom end of the valve stem 4 is fixedly connected to the valve core 3 , which is located above the valve seat 15 , and the top end of the valve stem 4 is fixedly connected to the handwheel 5 .

As a preferred embodiment of this embodiment, the upper end of the valve cover 2 is fixedly connected to a gland 10, and the front and rear sides of the gland 10 are fixedly connected to brackets 13. The valve stem 4 penetrates the middle part of the valve cover 2, the gland 10 and the bracket 13. The valve stem 4 4 movable connections, able to rotate.

It is worth mentioning that by turning the handwheel 5, the valve stem 4 can be driven to move up and down to open or close the valve.

As a preferred embodiment of this embodiment, a pressure plate 7 is provided in the middle of the outer ring of the valve stem 4, a filling material 6 is provided below the pressure plate 7, a bellows 14 is provided below the filling material 6, and two sealing mechanisms 8 are provided at the upper and lower ends of the bellows 14. .

As a preferred embodiment of this embodiment, the sealing mechanism 8 includes a limit seat 801. Each limit seat 801 is symmetrically provided with two limit grooves 802. A fixed gasket 803 is fixedly connected to the bottom of the limit groove 802. The fixed gasket 803 A spring 804 is fixedly connected to the outer end, and a sliding gasket 805 is fixedly connected to the outer end of the spring 804. The lower end of the sliding gasket 805 is provided with a transitional slope, and a sealing block 16 is slidingly connected to the slope. The sealing block 16 is fixedly connected to the valve stem 4.

During specific use, the surface size of the sliding gasket 805 matches the surface size of the sealing block 16 .

As a preferred embodiment of this embodiment, the left and right ends of the valve body 1 are respectively provided with an air outlet 11 and an air inlet 12 .

When the special corrugated pipe stop valve for chlorine gas of the present invention is used, when the hand wheel 5 is turned to move the valve stem 4 upward, the sealing block 16 will press the sliding gasket 805 to move inside the limiting groove 802. When the valve stem After 4 stops moving, the spring 804 will push the sliding gasket 805 back to close to the surface of the valve stem 4 to complete the seal.

The basic principles, main features and advantages of the present utility model are shown and described above. Those skilled in the industry should understand that the present utility model is not limited by the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only preferred examples of the present utility model and are not used to limit the present utility model. Without departing from the present utility model, Under the premise of keeping the spirit and scope of the present utility model, there will be various changes and improvements, and these changes and improvements all fall within the scope of the claimed utility model. The protection scope of the present utility model is defined by the appended claims and their equivalents.

Claims (4)

1. A special bellows stop valve for chlorine gas, characterized in that it includes a valve body (1), a valve cover (2) is fixedly connected to the upper end of the valve body (1), and the middle part of the valve cover (2) is movablely connected. There is a valve stem (4), and a valve seat (15) is fixedly connected to the inside of the valve body (1); A sealing gasket (9) is provided at the connection between the valve body (1) and the valve cover (2); A pressure plate (7) is provided in the middle of the outer ring of the valve stem (4), a filling material (6) is provided below the pressure plate (7), and a bellows (14) is provided below the filling material (6). Two sealing mechanisms (8) are respectively provided at the upper and lower ends of the bellows (14); The sealing mechanism (8) includes a limit seat (801). Each limit seat (801) is symmetrically provided with two limit grooves (802). The bottom of the limit groove (802) is fixedly connected with Fixed gasket (803), the outer end of the fixed gasket (803) is fixedly connected with a spring (804), the outer end of the spring (804) is fixedly connected with a sliding gasket (805), the sliding gasket (805) ) is provided with a transitional slope at its lower end, and a sealing block (16) is slidably connected to the slope, and the sealing block (16) is fixedly connected to the valve stem (4). 2. A special bellows stop valve for chlorine gas according to claim 1, characterized in that: a valve core (3) is fixedly connected to the bottom end of the valve stem (4), and the valve core (3) is located on the Above the valve seat (15), a handwheel (5) is fixedly connected to the top of the valve stem (4). 3. A special bellows stop valve for chlorine gas according to claim 1, characterized in that: the upper end of the valve cover (2) is fixedly connected with a gland (10), and the front and rear sides of the gland (10) are fixed. A bracket (13) is connected, and the valve stem (4) penetrates the middle part of the valve cover (2), gland (10) and bracket (13). 4. A special bellows stop valve for chlorine gas according to claim 1, characterized in that: the left and right ends of the valve body (1) are respectively provided with an air outlet (11) and an air inlet (12).