CN114811074A

CN114811074A - Double-seal air valve and control system

Info

Publication number: CN114811074A
Application number: CN202210395297.0A
Authority: CN
Inventors: 杨洪良; 曹璐璐; 孔德胜; 黄帅; 刘衍峰; 刘永允
Original assignee: Shandong Huaqin Rubber Technology Co ltd; Tongli Tire Co ltd
Current assignee: Shandong Huaqin Rubber Technology Co ltd; Tongli Tire Co ltd
Priority date: 2022-04-15
Filing date: 2022-04-15
Publication date: 2022-07-29

Abstract

The invention discloses a double-seal air valve and a control system, relates to the technical field of valve sealing, solves the problems that the sealing element of the existing air valve is easy to damage and has poor sealing performance, improves the sealing capability of the air valve, and has the following specific scheme: the valve body is in clearance fit with the valve core, the valve rod is fixedly connected with the valve core, a groove is formed in the outer side wall of one end, in contact with the valve body, of the valve core along the circumferential direction of the valve core, a telescopic sealing ring is fixedly arranged in the groove, and a filling port is formed in the sealing ring.

Description

Double-seal air valve and control system

Technical Field

The invention relates to the technical field of valve sealing, in particular to a double-seal air valve and a control system.

Background

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

The air doors in the smoke and air system are mostly not closed tightly, which is a long-term difficult problem of the part, zero leakage is difficult to ensure, normal operation is influenced, overhaul is delayed, potential safety and health hazards are caused to overhaul personnel, and adverse effects such as difficulty in controlling environmental protection indexes, increase of operation cost, frequent replacement of the air doors and the like are caused.

The inventor finds that the existing air valve mostly adopts a sealing mode of a valve core and a valve body or a simple sealing mode of adding a layer of rubber gasket. The sealing part of the air valve is easily damaged by foreign matters in smoke, particularly, the foreign matters (mostly deposited fly ash) influence the sealing joint surface to block the deep stroke of the valve core, and the sealing is not in place and tight, so that the sealing failure of the valve is caused. So that some conventional air valves used at present cannot meet the production and use requirements.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a double-seal air valve and a control system, wherein a groove is formed in the end part of a valve core, which is in contact with a valve body, a telescopic sealing ring is arranged in the groove, double-channel sealing is realized by matching the valve core with the sealing ring pressurized by a filling medium, and meanwhile, the sealing ring is protected by the valve core, so that the problems that the sealing part of the existing air valve is easily influenced by dust deposition and has poor sealing performance are solved.

In order to achieve the purpose, the invention is realized by the following technical scheme:

in a first aspect, the invention provides a double-seal air valve which comprises a valve body, a valve core and a valve rod, wherein the valve body is in clearance fit with the valve core, the valve rod is fixedly connected with the valve core, a groove is formed in the outer side wall of one end, in contact with the valve body, of the valve core along the circumferential direction of the valve core, a telescopic sealing ring is fixedly arranged in the groove, and a filling port is formed in the sealing ring.

As a further implementation mode, an air nozzle is fixedly arranged on the filling port.

As a further implementation mode, a water injection valve is fixedly arranged on the filling port.

As a further implementation mode, a water outlet is formed in the bottom of the sealing ring, and a drain valve is fixedly arranged on the water outlet.

As a further implementation mode, the sealing ring is made of materials resistant to high temperature and acid and alkali corrosion.

As a further implementation manner, the valve body is in any one of a circular structure type, a square structure type and a T-shaped structure type.

As a further realization mode, the groove is positioned in the middle position of the outer side wall of the valve core.

In a second aspect, the present invention provides a control system for controlling the above-mentioned double air sealing valve.

The system comprises a control center, a medium filling module and a distance sensing module, wherein the medium filling module and the distance sensing module are connected with the control center.

As a further implementation manner, the medium filling module consists of a filling pipe and a pressure gauge arranged on the filling pipe, and the filling pipe is connected with a filling port of the sealing ring; the distance sensing module consists of a distance sensor and a displacement sensor and is used for detecting the distance relationship between the valve body and the valve core.

The beneficial effects of the invention are as follows:

(1) according to the invention, the groove is formed at one end of the valve core, which is in contact with the valve body, along the circumferential direction of the valve core, the telescopic sealing ring is arranged in the groove, double sealing is realized through the matching of the valve core and the sealing ring, the obstacle that foreign matters (fly ash particles and the like) existing on the sealing surface are not tight to the traditional sealing is overcome, and meanwhile, the valve core is utilized to protect the sealing ring.

(2) The double-seal air valve has two seals, namely a hard seal and a soft seal, wherein the hard seal is the seal of the contact surface of the valve core and the valve body, 90-95% of sealing isolation can be completed, the double-seal air valve is also a natural protection and carrier for the soft seal, and the soft seal is the secondary seal of the contact surface of the valve core and the valve body, so that self-deformation, self-filling and irregular sealing can be realized, and zero leakage is ensured.

(3) The sealing ring is made of materials such as silica gel and nitrile rubber, has the excellent characteristics of high temperature resistance, acid and alkali corrosion resistance, high strength and durability.

(4) The control system can monitor the distance between the valve core and the valve body, and simultaneously monitor the working pressure of the medium in the sealing ring, thereby realizing the automatic control of the filling of the medium in the sealing ring, greatly improving the automation, ensuring the accuracy of the filling of the medium, and effectively avoiding the insufficient or overlarge pressure of the medium in the sealing ring.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.

FIG. 1 is a schematic front view of a circular double seal damper according to one or more embodiments of the present disclosure;

FIG. 2 is a schematic cross-sectional view A-A of the structure shown in FIG. 1;

FIG. 3 is a schematic front view of a square double-seal damper according to one or more embodiments of the present disclosure;

FIG. 4 is a schematic view of the cross-sectional structure B-B of the structure shown in FIG. 3;

FIG. 5 is a cross-sectional structural view of a seal portion according to one or more embodiments of the present disclosure;

in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;

wherein, 1, a first air nozzle; 2. a first valve stem; 3. a first inflatable seal ring; 4. a first valve spool; 5. a first valve body; 6. a second valve stem; 7. a second inflatable seal ring; 8. positioning pins; 9. a second valve body; 10. a second valve spool; 11. a second air tap; 12. hard sealing; 13. and (4) soft sealing.

Detailed Description

It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. 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 invention belongs.

As described in the background of the invention, the existing air valve mostly adopts hard sealing between the valve core and the valve body or simply soft sealing with a rubber gasket. The sealing part of the air valve is easily damaged by foreign matters in smoke, particularly, the foreign matters (mostly deposited fly ash) influence the sealing joint surface to block the deep stroke of the valve core, and the sealing is not in place and tight, so that the sealing failure of the valve is caused. The invention provides a double-seal air valve and a control system, aiming at solving the technical problem that some conventional air valves used at present cannot meet the production and use requirements.

Example 1

In a typical embodiment of the present invention, as shown in fig. 1-2, a double air-sealing valve is proposed, which is of a circular structure and is used in a smoke and air medium, and includes a circular first valve body 5, the first valve body 5 is in clearance fit with a first valve core 4, the first valve core 4 is also circular, a first air-charging sealing ring 3 is arranged on the first valve core 4, and the first valve core 4 is in sealing contact with the first valve body 5 through the first air-charging sealing ring 3.

The first valve core 4 is fixedly connected with the first valve rod 2, and the first valve core 4 is driven to move by the first valve rod 2, so that the first valve core 4 is controlled to be close to or far away from the first valve body 5.

Be connected with first air cock 1 on the first inflatable seal circle 3, first air cock 1 stretches out first valve body 5 from first valve rod 2 department for the operation of aerifing or deflating of first inflatable seal circle 3, in order to realize the flexible of first inflatable seal circle 3.

The medium of the first inflatable sealing ring 3 is flue gas, hot air, cold air or compressed air, the pressure is less than 0.3MPa, the temperature is less than 300 ℃, the first inflatable sealing ring 3 is made of silica gel, nitrile rubber and other materials, and the first inflatable sealing ring has the excellent characteristics of high temperature resistance, acid and alkali corrosion resistance, high strength and durability.

A groove is formed in the middle of the outer side wall of the first valve core 4 along the circumferential direction of the outer side wall, the first inflatable sealing ring 3 is fixedly arranged in the groove of the first valve core 4 through a positioning pin 8, the position of the first inflatable sealing ring 3 is limited through the groove, and the first inflatable sealing ring 3 is protected.

As shown in fig. 5, the circular double-seal air valve has two seals, namely a hard seal 12 and a soft seal 13, wherein the hard seal 12 is a seal of a contact surface between the first valve core 4 and the first valve body 5, can complete 90% -95% of sealing isolation, and is also a natural protection and carrier for the soft seal;

the soft seal 13 is a secondary seal of the contact surface between the first valve core 4 and the first valve body 5, and the first inflatable seal ring 3 can adapt to different contact surfaces after being inflated and expanded, so that even if the contact surface between the first valve body 5 and the first valve core 4 is not sealed tightly due to deformation, foreign body obstacle and other reasons, self-deformation, self-filling and irregular sealing can be realized under the action of the first inflatable seal ring 3, and zero leakage is ensured.

The obstacle that foreign matters (fly ash particles and the like) existing on a sealing surface cannot seal the traditional seal tightly is overcome, the groove on the first valve core 4 is used for protecting the first inflatable sealing ring 3, and meanwhile, the first inflatable sealing ring 3 can be used for sealing and wrapping the foreign matters, so that the foreign matters are sealed together;

and because the first inflatable sealing ring 3 is sealed in the forced sealing of filler type under the action of air pressure, the defects of untight sealing surface and irregular moment can be effectively overcome by the first inflatable sealing ring 3, and the first inflatable sealing ring 3 has excellent acid and alkali resistance and high temperature resistance, and can completely resist and overcome the corrosion of high-temperature acidic substances in flue gas.

It should be noted that the gas injected into the first inflatable sealing ring 3 cannot contain liquid, and the working pressure thereof must be higher than the pressure of the medium in the working environment, otherwise, when the water content is high, liquid may be accumulated at the bottom of the first inflatable sealing ring 3 under the long-term operation condition, which will affect the sealing effect and the service life of the first inflatable sealing ring 3.

In order to avoid liquid accumulation, a water outlet is reserved at the bottom of the first inflatable sealing ring 3, a water discharge valve is arranged, and accumulated water in the first inflatable sealing ring 3 can be cleaned regularly and the first inflatable sealing ring can be used for discharging gas media.

Example 2

In another exemplary embodiment of the present invention, as shown in fig. 3 to 4, a double air-tight valve is proposed, which is of a square structure and is used in a smoke and air medium, and comprises a square second valve body 9, the second valve body 9 is in clearance fit with a second valve core 10, the second valve core 10 is also square, a second air-tight seal 7 is arranged on the second valve core 10, and the second valve core 10 is in sealing contact with the second valve body 9 through the second air-tight seal 7.

The second valve core 10 is fixedly connected with the second valve rod 6, and the second valve core 10 is driven to move by the second valve rod 6, so that the second valve core 10 is controlled to be close to or far from the second valve body 9.

And a second air nozzle 11 is connected to the second inflatable sealing ring 7, and the second air nozzle 11 extends out of the second valve body 9 and is used for inflation or deflation operation of the second inflatable sealing ring 7 so as to realize expansion and contraction of the second inflatable sealing ring 7.

The medium of the second inflatable sealing ring 7 is flue gas, hot air, cold air or compressed air, the pressure is less than 0.3MPa, the temperature is less than 300 ℃, the second inflatable sealing ring 7 is made of silica gel, nitrile rubber and other materials, and has the excellent characteristics of high temperature resistance, acid and alkali corrosion resistance, high strength and durability.

A groove is formed in the middle of the outer side wall of the second valve core 10 along the circumferential direction of the outer side wall, the second inflatable sealing ring 7 is fixedly arranged in the groove of the second valve core 10 through a positioning pin 8, the position of the second inflatable sealing ring 7 is limited through the groove, and the second inflatable sealing ring 7 is protected.

As shown in fig. 5, the square double-seal air valve has two seals, namely a hard seal 12 and a soft seal 13, wherein the hard seal 12 is a seal after the second valve body 10 contacts with the second valve body 9, and a rubber seal is arranged at the contact position of the second valve body 9 and the second valve body 10, so that 90% -95% of sealing isolation can be completed, and the square double-seal air valve is also a natural protection and carrier for the soft seal;

the soft seal 13 is a secondary seal of the contact surface of the second valve element 10 and the second valve body 9, the second inflatable seal ring 7 can adapt to different contact surfaces after being inflated and expanded, even if the contact surface between the second valve body 9 and the second valve element 10 is not tight due to deformation, foreign matter obstruction and the like, self-deformation, self-filling and irregular sealing can be realized under the action of the second inflatable seal ring 7, and zero leakage is ensured.

The obstacle that foreign matters (fly ash particles and the like) existing on the sealing surface cannot seal the traditional seal tightly is overcome, the groove on the second valve core 10 is used for protecting the second inflatable sealing ring 7, and meanwhile, the second inflatable sealing ring 7 can be used for sealing and wrapping the foreign matters, so that the foreign matters are sealed together;

and because the second inflatable sealing ring 7 is sealed by the forced plug-type seal under the action of air pressure, the defects of untight and irregular sealing surface can be effectively overcome by the sealing of the second inflatable sealing ring 7, and the second inflatable sealing ring 7 has excellent acid and alkali resistance and high temperature resistance, and can completely resist and overcome the corrosion of high-temperature acidic substances in flue gas.

It can be understood that in other embodiments, the structural form of the double air sealing valve may also be a structural form such as a convex shape, a T shape, and the like, and the specific structural form may be set according to actual requirements, which is not limited too much here.

Example 3

In another exemplary embodiment of the present invention, a dual-seal air valve is provided, where the dual-seal air valve includes a valve rod, a valve body, a valve core, and a retractable sealing ring, the valve core is in clearance fit with the valve body, the valve rod is fixed on the valve core, and the operation of the valve core is controlled by the valve rod.

Be equipped with the telescopic sealing washer between case and the valve body, it is specific, be equipped with the recess along its circumference on the lateral wall middle part position that valve body and case contacted, the telescopic sealing washer passes through the fixed setting of locating pin in the recess.

The telescopic sealing ring is of a hollow structure and is made of materials with high temperature resistance, acid and alkali corrosion resistance, such as silica gel, nitrile rubber and the like, a water filling port is arranged on the telescopic sealing ring, and a water filling valve is fixedly arranged at the position of the water filling port and used for filling water into the sealing ring to realize expansion of the sealing ring.

The bottom of telescopic sealing washer still is equipped with the outlet to set up the drain valve in outlet department, can carry out drainage work, through the cooperation of water injection and drainage, realized the flexible of sealing washer, and then guaranteed the sealed between valve body and the case.

It should be noted that the added medium cannot be clear water, so as to avoid the freezing phenomenon of the medium in winter.

Example 4

In another exemplary embodiment of the present invention, a control system is provided, where the control system includes a control center, a medium filling module, a medium discharging module, and a distance sensing module, and the medium filling module, the medium discharging module, and the distance sensing module are all connected to the control center.

The medium filling module is connected with filling ports such as an air tap or a water filling port of the sealing ring and the like and is used for filling gas or liquid medium into the sealing ring so as to realize expansion of the sealing ring;

the medium filling module comprises a filling pipe and a pressure gauge arranged on the filling pipe, the filling pipe is connected with the filling port, the working pressure in the sealing ring can be monitored according to the pressure gauge, and the phenomenon that the sealing ring is not tight due to insufficient working pressure of the sealing ring or is damaged due to overlarge working pressure is avoided.

The medium discharging module is connected with a water discharging valve at the bottom of the sealing ring and used for controlling the discharging of gas or liquid medium in the sealing ring.

The distance sensing module consists of distance sensors, displacement sensors and monitoring units at equal intervals, can detect the distance relationship between the valve body and the valve core, and can control the medium filling module to work after the valve core is confirmed to move in place, fill the medium into the sealing ring and control the start and stop of medium filling according to the pressure monitoring value.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The double-seal air valve is characterized by comprising a valve body, a valve core and a valve rod, wherein the valve body is in clearance fit with the valve core, the valve rod is fixedly connected with the valve core, a groove is formed in the outer side wall of one end, in contact with the valve body, of the valve core along the circumferential direction of the outer side wall, a telescopic sealing ring is fixedly arranged in the groove, and a filling port is formed in the sealing ring.

2. A double air seal valve according to claim 1, wherein an air tap is fixedly arranged on the filling port.

3. A double air seal valve according to claim 1, wherein a water filling valve is fixedly arranged on the filling port.

4. A double-sealing air valve according to claim 1, wherein a water outlet is arranged at the bottom of the sealing ring, and a drain valve is fixedly arranged on the water outlet.

5. A double sealing damper according to claim 1, wherein said sealing ring is made of a material resistant to high temperature, acid and alkali corrosion.

6. A double air seal valve according to claim 1, wherein the valve body is of any one of circular, square and T-shaped structure type.

7. A double seal vent valve according to claim 1, wherein the groove is located at a middle position of the outer side wall of the valve core.

8. A control system for controlling a double seal damper as claimed in any one of claims 1 to 7.

9. The control system of claim 8, comprising a control center, a media filling module and a distance sensing module, wherein the media filling module and the distance sensing module are connected with the control center.

10. The control system according to claim 9, wherein the medium filling module comprises a filling pipe and a pressure gauge arranged on the filling pipe, and the filling pipe is connected with a filling port of the sealing ring; the distance sensing module consists of a distance sensor and a displacement sensor and is used for detecting the distance relationship between the valve body and the valve core.