CN219366810U

CN219366810U - Single-acting cut-off valve with auxiliary switch gas circuit structure

Info

Publication number: CN219366810U
Application number: CN202222567353.2U
Authority: CN
Inventors: 侯鹏; 闫洪燕; 徐建伟
Original assignee: Yankuang Lunan Chemical Co ltd
Current assignee: Yankuang Lunan Chemical Co ltd
Priority date: 2022-09-27
Filing date: 2022-09-27
Publication date: 2023-07-18
Anticipated expiration: 2032-09-27

Abstract

The utility model discloses a single-acting cut-off valve with an auxiliary switch gas circuit structure, and belongs to the technical field of single-acting cut-off valves. The single-acting cut-off valve with the auxiliary switch gas circuit structure comprises a gas source, a control valve and a pneumatic film executing mechanism; the air source is communicated with the control valve, a first air outlet of the control valve is communicated with an air source interface of a lower film cover of the pneumatic film executing mechanism through an air source pipe, and a second air outlet of the control valve is communicated with an air source interface of an upper film cover of the pneumatic film executing mechanism through an air source pipe and is positioned on a spring side of the pneumatic film executing mechanism. The valve can be ensured to be closed in place under the condition that the valve is not replaced; solves the problem that the spring acting force is insufficient to push the valve to act in place in the prior art.

Description

Single-acting cut-off valve with auxiliary switch gas circuit structure

Technical Field

The utility model relates to the technical field of single-acting stop valves, in particular to a single-acting stop valve with an auxiliary switch gas circuit structure.

Background

The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.

The single-acting cut-off valve is an air-opening valve and consists of a pneumatic actuating mechanism and a valve body, the valve is pushed to be opened by means of air source pressure, and the valve is closed by means of spring force.

However, long-term use can lead to elastic fatigue of a spring in the pneumatic execution structure, tension is reduced, and the thrust generated by the spring is insufficient to push the valve to complete full-stroke action; in addition, because of the scaling of the medium, the friction force between the valve core and the valve seat is increased, and the spring force is insufficient to push the valve to act in place, so that the valve cannot be opened or closed in place. If the valve is replaced, the cost and labor cost for replacing the valve are increased, and normal use is affected.

Disclosure of Invention

Aiming at the defects existing in the prior art, the embodiment of the utility model aims to provide a single-acting cut-off valve with an auxiliary switch gas circuit structure, so as to solve the problem that the spring tension is reduced insufficiently to push a valve switch to be in place in the prior art.

In order to achieve the above object, the embodiment of the present utility model provides the following technical solutions:

a single-acting cut-off valve with an auxiliary switch gas circuit structure comprises a gas source, a control valve and a pneumatic film executing mechanism;

the air source is communicated with the control valve, a first air outlet of the control valve is communicated with an air source interface of a lower film cover of the pneumatic film executing mechanism through an air source pipe, and a second air outlet of the control valve is communicated with an air source interface of an upper film cover of the pneumatic film executing mechanism through an air source pipe and is positioned on a spring side of the pneumatic film executing mechanism.

Further, the control valve is a two-position five-way air control valve or a two-position five-way electromagnetic valve.

Further, the air source pipe is a stainless steel air source pipe.

Further, the air source pipes are respectively fixed on the pneumatic film executing mechanism through bolts.

Further, the valve further comprises a valve body, a valve cover, a valve core, a valve rod, a push rod and a bracket;

the two sides of the valve body are respectively provided with a liquid inlet cavity and a liquid outlet cavity, the valve cover is vertically arranged at the top end of the valve body and is in threaded connection with the valve body, the bracket is vertically arranged at the top end of the valve cover, and the pneumatic film executing mechanism is arranged at the top end of the bracket;

one end of the valve core is connected with one end of the valve rod, and the other end of the valve rod is connected with one end of the push rod; the valve core is vertically arranged in the valve body, the valve rod sequentially penetrates through the support and the valve cover, and the push rod sequentially penetrates through the pneumatic film executing mechanism and the support.

Further, a valve indication block is arranged at the upper end of the valve rod, and the valve indication block is positioned in the bracket; the inner side of the bracket is provided with a travel scale which is positioned in the middle of the bracket

Further, a sealing filler is arranged between the valve cover and the push rod.

Further, the valve sleeve is also included; the valve sleeve is arranged in the valve body and positioned in the liquid outlet cavity, and the valve sleeve is sleeved on the valve core.

Further, a plurality of liquid inlet holes are formed in the circumferential side of the valve sleeve.

Further, the pneumatic film actuator further comprises a diaphragm;

the diaphragm is horizontally arranged in the pneumatic film executing mechanism, one end of the spring is connected with the diaphragm, the other end of the spring is connected with the upper film cover, and the bottom surface of the diaphragm is connected with a push rod penetrating through the pneumatic film executing mechanism.

The technical scheme provided by the embodiment of the utility model has at least the following technical effects or advantages:

1. when the valve is closed, the acting force of the spring and the superposition of air source pressure are added, and the superposition of double acting forces is enough to eliminate the tension of spring loss and the influence of increased friction force between the valve core and the valve seat, so that the valve is ensured to be closed in place.

2. The cost and the labor cost for replacing the new valve are saved, and the normal use of the equipment is avoided.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

FIG. 1 is a schematic diagram of a structure provided by an embodiment of the present utility model;

in the figure: 1. a gas source; 2. a control valve; 3. an air source pipe; 4. a film cover is arranged; 5. a lower film cover; 6. a valve body; 7. a valve cover; 8. a bracket; 9. a valve stem; 10. a valve core; 11. a push rod; 12. a valve indication block; 13. travel scale.

The mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.

Detailed Description

It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present utility model. As used herein, the singular forms also are intended to include the plural forms unless the present utility model clearly dictates otherwise, and furthermore, it should be understood that when the terms "comprise" and/or "include" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

for convenience of description, the words "upper", "lower", "left" and "right" in the present utility model, if they mean only that the directions are consistent with the upper, lower, left, and right directions of the drawings per se, and do not limit the structure, only for convenience of description and simplification of the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Term interpretation section: the terms "mounted," "connected," "secured," and the like in the present utility model are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the terms "mechanically coupled" and "directly coupled" may be used interchangeably to refer to either a mechanical coupling, an indirect coupling via an intermediary, an internal coupling of two elements, or an interaction of two elements, as would be understood by one of ordinary skill in the art, and the terms are to be understood in the specific sense of the present utility model as appropriate.

As described in the background art, with the increase of service life and the increase of friction force between the valve core and the valve seat, the single-acting cut-off valve in the prior art can cause insufficient spring force to support the valve to act in place.

As shown in fig. 1, in one embodiment of the present utility model, a single-acting shut-off valve with an auxiliary switch air path structure is described, which comprises an air source 1, a control valve 2, a pneumatic film actuator, a valve body 6, a valve cover 7, a valve core 10, a valve rod 9, a push rod 11, a bracket 8 and a valve sleeve; the two sides of the valve body 6 are respectively provided with a liquid inlet cavity and a liquid outlet cavity, the valve cover 7 is vertically arranged at the top end of the valve body 6, the valve cover 7 is in threaded connection with the valve body 6, the bracket 8 is vertically arranged at the top end of the valve cover 7, and the pneumatic film executing mechanism is arranged at the top end of the bracket 8; one end of the valve core 10 is connected with one end of the valve rod 9, and the other end of the valve rod 9 is connected with one end of the push rod 11; the valve core 10 is vertically arranged in the valve body 6, the valve rod 9 sequentially penetrates through the support 8 and the valve cover 7, and the push rod 11 sequentially penetrates through the pneumatic film executing mechanism and the support 8.

The upper end of the valve rod 9 is provided with a valve indication block 12, and the valve indication block 12 is positioned in the bracket 8; the travel scale 13 is arranged on the inner side of the support 8, the travel scale 13 is positioned in the middle of the support 8, the valve indicating block 12 moves up and down along the travel scale 13 under the drive of the valve rod 9, and the distance of the up and down movement of the valve core 10 can be further known according to the scale of the travel scale 13. A sealing packing is arranged between the valve cover 7 and the push rod 11. The valve sleeve is arranged in the valve body 6 and positioned in the liquid outlet cavity, and a first through hole matched with the valve sleeve and communicated with the liquid outlet cavity is formed in the top of the liquid outlet cavity; the upper end of the valve sleeve is provided with a mounting through hole matched with the upper end of the valve core 10, the valve sleeve is sleeved on the valve core 10, and the circumferential side of the valve sleeve is provided with a plurality of liquid inlet holes. The top of feed liquor chamber is offered and is matees and go out the through-hole that liquid chamber communicates with case 10, and the disk seat is installed on the top of through-hole, and case 10 wears to locate the disk seat.

The pneumatic film actuator comprises a diaphragm, a spring, an upper film cover 4 and a lower film cover 5; the upper membrane cover 4 and the lower membrane cover 5 are oppositely arranged to form a shell, the membranes are horizontally arranged inside the shell, the number of the springs is 2, the springs are respectively arranged at two ends of the shell along the length direction, one ends of the springs are connected with the membranes, the other ends of the springs are connected with the upper membrane cover 4, and the bottom surface of the membranes is connected with a push rod 11 penetrating through a pneumatic membrane mechanism.

The air source 1 is communicated with the control valve 2, a first air outlet of the control valve 2 is communicated with an air source 1 interface of the lower film cover 5 through an air source pipe 3, and a second air outlet of the control valve 2 is communicated with an air source 1 interface of the upper film cover 4 of the pneumatic film executing mechanism through an air source pipe 3 and is positioned at the spring side of the pneumatic film executing mechanism. The air source pipes 3 are respectively fixed on the pneumatic film executing mechanism through bolts.

When the valve is closed, the two-position five-way electromagnetic valve is used for switching the air passage, the pressure of the air source 1 is transmitted to the upper film cover 4 of the pneumatic film executing mechanism, and meanwhile, the air in the lower film cover 5 is exhausted, so that the acting force of the spring and the pressure of the air source 1 are overlapped, the double acting force is overlapped, the tension of the spring loss and the influence of the increased friction force between the valve core 10 and the valve seat can be offset, and the valve is ensured to be closed in place.

In this embodiment, the control valve 2 is a two-position five-way electromagnetic valve, and the air source pipe 3 is a stainless steel air source pipe.

In some embodiments, the control valve 2 is a two-position five-way pneumatic control valve.

While the foregoing description of the embodiments of the present utility model has been presented in conjunction with the drawings, it should be understood that it is not intended to limit the scope of the utility model, but rather, it is intended to cover all modifications or variations within the scope of the utility model as defined by the claims of the present utility model.

Claims

1. A single-acting cut-off valve with an auxiliary switch gas circuit structure is characterized by comprising a gas source, a control valve and a pneumatic film executing mechanism;

2. The single-acting shut-off valve with auxiliary switching air path structure according to claim 1, wherein the control valve is a two-position five-way solenoid valve or a two-position five-way air control valve.

3. The single-acting shut-off valve with auxiliary switching air path structure of claim 1, wherein said air source tube is a stainless steel air source tube.

4. The single-acting shut-off valve with auxiliary switching air path structure according to claim 1, wherein the air source pipes are respectively fixed to the pneumatic film actuator by bolts.

5. The single-acting shut-off valve with auxiliary switching air path structure according to claim 1, further comprising a valve body, a valve cap, a valve core, a valve rod, a push rod and a bracket;

6. The single-acting shut-off valve with auxiliary switch air path structure as set forth in claim 5, wherein a valve indication block is provided at the upper end of the valve rod, the valve indication block being located inside the bracket; the inner side of the bracket is provided with a travel scale which is positioned in the middle of the bracket.

7. The single-acting shut-off valve with auxiliary switching air path structure according to claim 5, wherein a packing is provided between the valve cover and the push rod.

8. The single-acting trip valve with auxiliary switching air path structure of claim 5, further comprising a valve sleeve; the valve sleeve is arranged in the valve body and positioned in the liquid outlet cavity, and the valve sleeve is sleeved on the valve core.

9. The single-acting shut-off valve with auxiliary switching air path structure according to claim 8, wherein a plurality of liquid inlet holes are opened at the circumferential side of the valve sleeve.

10. The single-acting shut-off valve with auxiliary switch air path structure of claim 1, wherein said pneumatic diaphragm actuator further comprises a diaphragm;