CN204176055U - A kind of axial flow gas control balance stop valve - Google Patents

Abstract

The utility model discloses a kind of axial flow gas control balance stop valve, comprise housing, enclosure interior side arranges valve component, the side of valve component arranges B outlet, the opposite side of valve component installs movable valve seat, install moving valve in movable valve seat, moving valve side arranges tieing, and the end of tieing arranges sealing gasket.The design adopts axial flow to design, compact structure, and required installing space is little.Now stop valve commercially, valve seat is all fixed, and the design adopts the movable valve seat of band equalizing orifice, and the life-span is long, opens and closes sensitive, reliable.

Description

An axial-flow air-controlled balance stop valve

technical field

The utility model relates to an axial-flow air-controlled balance cut-off valve.

Background technique

Axial-flow air-controlled balance shut-off valve is a shut-off valve controlled by a pressure air source, with axial air intake, to control the on-off of fluid in the high-pressure system, and realize the on-off control. The product is small in size, small in flow resistance, easy to install, saves installation space, and can realize remote control. It is mainly used in high-pressure fluid systems. The valve seats of the existing air-controlled balanced globe valves are all fixed, insensitive to opening and closing, occupy a large space, and are easily damaged during use. The airtightness of the existing air-controlled balance stop valve is not good, and gas leakage often occurs during use.

Utility model content

The technical problem to be solved by the utility model is to overcome the defects of the prior art and provide an axial-flow air-controlled balance stop valve.

In order to solve the above technical problems, the utility model provides the following technical solutions: an axial-flow air-controlled balance stop valve, including a housing, a valve seat assembly is provided on one side of the housing, and B outlet is provided on one side of the valve seat assembly , the other side of the valve seat assembly is installed with a movable valve seat, and a movable valve is installed inside the movable valve seat. A knot is arranged on one side of the movable valve, and a gasket is arranged at the end of the knot, and the knot is matched with the movable valve through the gasket. A throttle is set on the inner side of the joint, A inlet is set on the side of the throttle, a spring is set between the movable valve seat and the housing, one side of the spring cooperates with the housing, and the other side of the spring cooperates with the movable valve seat , A piston is set on the casing between the valve seat assembly and the movable valve seat, and a C control port is set on the top of the spring on the casing.

In order to further realize the purpose of the utility model, the following technical solutions can also be adopted: a first sealing ring is provided between the valve seat assembly and the housing, and a second sealing ring is provided between the valve seat assembly and the movable valve seat. A fifth sealing ring is set between the knot and the housing, a fourth sealing ring is set between the knot and the movable valve seat, and a third sealing ring is set between the knot and the movable valve.

The utility model has the advantages of:

This design adopts the axial flow design, which has a compact structure and requires a small installation space. The globe valves on the market now have fixed valve seats. This design uses a movable valve seat with a balance hole, which has a long life, sensitive and reliable opening and closing.

The imported cage-type restrictor is designed to reduce the flow rate of the medium, prevent the fluid from directly scouring the movable valve seat and gasket, and improve the product life. The structural design of the valve adopts the axial flow structure. In order to save the installation space, the design adopts the axial flow structure, which is small in size and good in economy. Adopt movable balance valve seat structure. In order to ensure the economy of the movable valve, reduce the volume of the product, and improve the performance and life of the product, a balance hole is designed on the movable valve seat to ensure that the axial force of the movable valve seat is zero, and the inlet adopts a cage restrictor. In order to ensure the reliability and service life of the movable valve, a cage restrictor is used at the inlet to reduce the flow rate of the medium and prevent the medium from directly washing the movable valve seat and gasket. The utility model also has the advantages of simple and compact structure, low manufacturing cost and easy use.

Description of drawings

The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the description, and are used to explain the utility model together with the embodiments of the utility model, and do not constitute a limitation to the utility model. In the attached picture:

Fig. 1 is the structural representation of the utility model.

Marked parts: 1 central air supply box 2 first air supply box 3 second air supply box 4 central air supply duct 5 first auxiliary air supply duct 6 second auxiliary air supply duct 7 electric double position constant air volume Device 8 electric closed valve 9 controller DCS 10 static pressure box.

Detailed ways

The preferred embodiments of the present utility model are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present utility model, and are not intended to limit the present utility model.

An axial-flow air-controlled balanced globe valve, as shown in Figure 1, includes a housing 2, a valve seat assembly 1 is provided on one side of the housing 2, a B outlet 10 is provided on one side of the valve seat assembly 1, and the valve seat assembly 1 A movable valve seat 4 is installed on the other side of the movable valve seat 4, and a movable valve 11 is installed in the movable valve seat 4. A knot 8 is arranged on one side of the movable valve 11, and a gasket 5 is arranged at the end of the junction 8, and the junction 8 is connected to the movable valve through the gasket 5. The valve 11 cooperates, the inner side of the joint 8 is provided with a throttle 17, the joint 8 is located on the side of the throttle 17, and the A inlet 16 is provided, and the return spring 7 is provided between the movable valve seat 4 and the housing 2, and one part of the spring 7 The other side of the spring 7 is matched with the movable valve seat 4. The piston 3 is arranged between the valve seat assembly 1 and the movable valve seat 4 on the casing 2, and the C Control port 18. When the utility model is in use, by controlling the air source, the piston 3 and the movable valve seat 4 are pushed to compress the spring 7, so that the movable valve 11 is disengaged from the sealing gasket 5 to realize the opening of the valve; Under the action of the spring 7, the seat 4 contacts and seals with the movable valve seat 4 again, cutting off the fluid in the system.

As shown in FIG. 1 , the illustrated state is that the C control port 18 does not supply air (0.4 to 0.8 MPa), and the movable valve 11 is in a closed state under the force of the spring 7 .

First, the valve is opened: the control compressed gas (0.4 to 0.8 MPa) is passed into the C control port 18, and the compressed gas pushes the piston 3 and the movable valve 11 seat to separate from the gasket 5, so that the fluid in the system flows from the A inlet 16 to the B outlet 10. Complete the opening function of the movable valve 11.

Second, the valve is closed: after the control gas supply of the C control port 18 stops, the movable valve 11 pushes the movable valve seat 4 and the piston 3 under the action of the force of the spring 7, so that the movable valve seat 4 contacts the gasket 5 again and Sealing, so that the active valve 11 is closed, and the fluid in the system is cut off.

The design of the movable valve seat 4, in terms of structural design, the movable valve seat 4 is in the high-pressure system, and the resultant force of the axial force is zero, otherwise the force-bearing area of the piston 3 will be increased, the overall volume of the movable valve 11 will become larger, and at the same time it will Affect the life, reliability and economy of the movable valve 11. Simultaneously, if the movable valve seat 4 wants to achieve the balance of the axial pressure, a pressure balance hole should be designed. The design of the spring 7, the force generated by the spring 7 should be able to overcome the friction between the components, and at the same time provide the sealing force generated by contact with the gasket 5.

This design adopts the axial flow design, which has a compact structure and requires a small installation space. The globe valves on the market now have fixed valve seats. This design adopts the movable valve seat 4 with a balance hole, which has a long life, sensitive and reliable opening and closing.

A cage-type restrictor 17 is designed at the import to reduce the flow rate of the medium, prevent the fluid from directly washing the movable valve seat 4 and the sealing gasket 5, and improve the product life.

The structural design of the valve adopts the axial flow structure. In order to save the installation space, the design adopts the axial flow structure, which is small in size and good in economy. Adopt movable balance valve seat structure. In order to ensure the economy of the movable valve 11, reduce the volume of the product, and improve the performance and life of the product, a balance hole is designed on the movable valve seat 4 to ensure that the axial force of the movable valve seat 4 is zero, and the inlet adopts cage throttling device 17. In order to ensure the reliability and service life of the movable valve 11, a cage restrictor 17 is used at the inlet to reduce the flow rate of the medium and prevent the medium from directly washing the movable valve seat 4 and the gasket 5.

A first sealing ring 9 is provided between the valve seat assembly 1 and the housing 2 , and a second sealing ring 12 is provided between the valve seat assembly 1 and the movable valve seat 4 . The first sealing ring 9 can ensure the sealing between the valve seat assembly 1 and the housing 2 , and the second sealing ring 12 can ensure the sealing between the valve seat assembly 1 and the movable valve seat 4 .

A fifth sealing ring 15 is set between the knot 8 and the housing 2, a fourth sealing ring 14 is set between the knot 8 and the movable valve seat 4, and a third sealing ring 13 is set between the knot 8 and the movable valve 11. . The fifth sealing ring 15 can ensure the tightness between the joint 8 and the housing 2, the fourth sealing ring 14 can ensure the tightness between the joint 8 and the movable valve seat 4, and the third sealing ring 13 can ensure the tightness between the joint 8 and the movable valve seat 4. 8 and the tightness between the movable valve 11.

Finally, it should be noted that: the above is only a preferred embodiment of the utility model, and is not intended to limit the utility model, although the utility model has been described in detail with reference to the foregoing embodiments, for those skilled in the art , it is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (3)

1. an axial flow gas control balance stop valve, it is characterized in that: comprise housing (2), housing (2) inner side arranges valve component (1), the side of valve component (1) arranges B outlet (10), the opposite side of valve component (1) installs movable valve seat (4), in movable valve seat (4), moving valve (11) is installed, moving valve (11) side arranges tieing (8), the end of tieing (8) arranges sealing gasket (5), tieing (8) is coordinated with moving valve (11) by sealing gasket (5), the inner side of tieing (8) arranges flow controller (17), tieing (8) is positioned at flow controller (17) side and A import (16) is set, Returnning spring (7) is set between movable valve seat (4) and housing (2), the side of spring (7) coordinates with housing (2), the opposite side of spring (7) coordinates with movable valve seat (4), housing (2) is positioned between valve component (1) and movable valve seat (4) and piston (3) is set, housing (2) is positioned at spring (7) top and C control mouth (18) is set.

2. axial flow gas control balance stop valve according to claim 1, it is characterized in that: the first seal ring (9) is set between described valve component (1) and housing (2), the second seal ring (12) is set between valve component (1) and movable valve seat (4).

3. axial flow gas control balance stop valve according to claim 1, it is characterized in that: the 5th seal ring (15) is set between described tieing (8) and housing (2), 4th seal ring (14) is set between tieing (8) and movable valve seat (4), the 3rd seal ring (13) is set between tieing (8) and moving valve (11).