CN214890492U

CN214890492U - Container valve plug screw

Info

Publication number: CN214890492U
Application number: CN202121710796.1U
Authority: CN
Inventors: 郑勤; 石瑞君; 高宁丽
Original assignee: Ningbo Sanan Valve Manufacture Co ltd
Current assignee: Ningbo Sanan Valve Manufacture Co ltd
Priority date: 2021-07-26
Filing date: 2021-07-26
Publication date: 2021-11-26
Anticipated expiration: 2031-07-26

Abstract

The application discloses container valve plug screw includes: the valve body is provided with an inlet and an outlet, and a cavity is formed in the valve body; the pressure cap is internally provided with a screw plug, the screw plug is internally provided with a valve inside, the valve inside is in sealing fit with the pressure cap to form a second valve, and the lower end of the screw plug is provided with a mandril; the piston is in sealing fit with the valve body to form a first valve, a screw is arranged at the lower end of the piston in a threaded manner, a first sealing ring is arranged between the top end of the screw and the piston, and a through hole is formed in the screw; the air chamber is formed between the pressing cap and the piston, the through hole is communicated with the air chamber, the first spring is arranged in the air chamber, when the valve core acts, the second valve is opened, the piston moves upwards to enable the ejector rod to be inserted into the through hole, and therefore the ejector rod and the first sealing ring are in sealing fit to form the third valve. This application processing is simple, convenient assembling to container valve can open completely after the valve core action, and the safe smooth and easy of guarantee fire extinguishing agent spouts puts.

Description

Container valve plug screw

Technical Field

The application relates to the technical field of container valves, in particular to a container valve plug screw.

Background

The container valve is widely applied in the field of fire-fighting equipment, and has higher requirements on safety, reliability, functionality and the like along with the integral development of the field of fire-fighting equipment in recent years, a piston of the prior container valve is arranged in a valve body, a sealing piece at the lower end of the piston is in sealing contact with the valve body, a spring is arranged at the upper end of the piston, the spring is spliced in the valve body by pressing threads, a valve core is arranged in a pressing cap, the sealing piece on the valve core is in sealing contact with the pressing cap, the valve core can move up and down in a screw plug under the action of the spring and external force, and the communication between an inlet and an outlet is controlled by jacking the valve core to ensure that a fire extinguishing agent is sprayed,

however, the fire extinguishing apparatus with the above structure has the following disadvantages in the opening height of the piston when the valve of the container valve is opened: because the screw on the piston is provided with the tiny hole, the steel cylinder provided with the container valve can close the piston through the tiny hole on the screw when the fire extinguishing agent gas is filled (the stress area of the upper end of the piston is larger than that of the piston valve); when the valve core is opened, the high-pressure gas at the upper end of the piston is released along with the opening of the valve core, so that the pressure is reduced, the pressure at the lower end of the piston is greater than the pressure at the upper end of the piston under the action of the high-pressure gas in the steel cylinder, and the piston moves upwards to open the valve. However, when the gas in the screw plug channel and the valve core channel is not discharged timely or the flow of the screw small hole on the piston is larger than the discharge flow under the action of high-pressure gas, the piston moves downwards to be closed, and the spraying of the fire extinguishing agent is influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a container valve plug screw, which is simple to process and convenient to assemble, and the valve of the container valve can be completely opened after the valve inside acts, thereby ensuring the safe and smooth spraying of the fire extinguishing agent.

To achieve the above objects, the present application provides a vessel valve plug screw comprising:

the valve body is provided with an inlet and an outlet, a cavity is formed in the valve body, and the cavity is respectively communicated with the inlet and the outlet;

the pressure cap is in threaded connection with the valve body, a screw plug is arranged in the pressure cap, a valve core is movably arranged in the screw plug, the valve core and the pressure cap are in sealing fit to form a second valve, and a mandril is arranged at the lower end of the screw plug; and

the piston is arranged in the cavity and positioned below the pressing cap, the piston and the valve body are in sealing fit to form a first valve, the first valve controls the inlet to be communicated with the outlet or cuts off the inlet and the outlet through opening and closing, a screw is arranged at the lower end of the piston in a threaded manner, a first sealing ring is arranged between the top end of the screw and the piston, and a through hole is formed in the screw;

the pressure cap is connected with the piston through the first spring, when the valve core acts, the second valve is opened, the piston moves upwards to open the first valve, and the ejector rod is inserted into the through hole, so that the ejector rod and the first sealing ring are in sealing fit to form a third valve.

Compared with the prior art, the beneficial effect of this application lies in: the second normal door is opened after the valve core acts, the piston moves upwards under the action of the air pressure difference to enable a first sealing ring in the piston to be in sealing fit with the ejector rod at the lower end of the screw plug, so that high-pressure gas in a bottle at the lower end of the piston is isolated from flowing to the gas chamber through a through hole in the screw, the pressure of the gas chamber flows to the valve core along with the gas through a screw plug vent channel, the discharge is reduced to 0, the piston continues to move upwards to be completely opened under the action of the high-pressure gas in the bottle at the lower end, and smooth spraying of the fire extinguishing agent is fully guaranteed; after the fire extinguishing agent is sprayed, the piston moves downwards under the action of the first spring force to close the valve, so that automatic closing is completed, and preparation is made for the steel cylinder to fill the fire extinguishing agent and then the container valve enters the next round for use.

As the improvement, a cavity is formed in the screw plug, the valve core is arranged in the cavity, a second spring is further arranged in the cavity, the second spring enables the valve core to be tightly abutted to the inner side of the cavity, and through the improvement, the valve core can be guaranteed to be tightly abutted to the inner side of the cavity, the sealing effect of the valve core is improved, the durability of the fire extinguisher is improved, and the long-time normal use of the fire extinguisher is guaranteed.

As an improvement, the screw plug is provided with at least one ventilation channel which is communicated with the air chamber and the cavity, and through the improvement, the ventilation channel on the screw plug is communicated with the cavity and the air chamber, so that the screw plug and the valve body can be assembled without being provided with additional ventilation holes, and the communication between the cavity and the air chamber can be completed, thereby further improving the sealing performance of the whole device and ensuring the normal use of the fire extinguisher.

As the improvement, a transition part is arranged between the screw plug and the ejector rod, one outlet of the ventilation channel is arranged on the transition part, and the other outlet of the ventilation channel is arranged in the cavity.

As the improvement, the transition portion is cylindricly, the transition portion can mill opposite side or hexagonal limit, and through the aforesaid improvement, mill opposite side or hexagonal limit and be convenient for screw, can guarantee that the assembly of plug screw is more convenient, improves assembly efficiency.

As the improvement, the top end of the cavity is provided with an opening, the pressing cap is arranged at the top end of the valve body and is positioned at the opening, and through the improvement, the pressing cap is arranged at the top end of the valve body and is in a conventional design, so that the pressure-type fire extinguisher is suitable for most fire extinguishers and is suitable for large-scale production.

As an improvement, the screw with the piston threaded connection, set up on the piston with the trompil of through-hole intercommunication, first sealing washer is located in the trompil, through the above-mentioned improvement, with the first sealing washer of holding through the trompil, can place first sealing washer in advance in the piston to make screw and piston screw-thread fit through screwing the screw, can accomplish the rapid Assembly of high accuracy, improve assembly efficiency, the first sealing washer of preinstallation also can improve the precision of the mounted position of first sealing washer in the piston, improves sealed effect simultaneously.

As the improvement, press the cap with be equipped with the second sealing washer between the valve body, the second sealing washer can prevent that the air from passing through the clearance circulation between pressing cap and the valve body, improves sealed effect.

As the improvement, the lower end of the ejector rod is conical, and the ejector rod can conveniently extend into the through hole of the piston through the improvement, so that the ejector rod can smoothly complete the action of inserting the piston when the valve core acts, and the normal use of the fire extinguisher is guaranteed.

Drawings

Fig. 1 is a sectional view of the overall structure of a container valve plug screw according to the present invention;

fig. 2 is a partially enlarged schematic view of a in fig. 1.

In the figure: 1. a valve body; 11. an inlet; 12. an outlet; 13. a chamber; 131. a piston; 1311. opening a hole; 1312. a first seal ring; 132. a screw; 1321. a through hole; 133. an air chamber; 1331. a first spring; 2. pressing the cap; 21. a plug screw; 210. a cavity; 211. a valve core; 212. a second spring; 22. a transition section; 221. a vent passage; 23. a top rod; 24. and a second seal ring.

Detailed Description

The present application is further described below with reference to specific embodiments, and it should be noted that, without conflict, any combination between the embodiments or technical features described below may form a new embodiment.

In the description of the present application, it should be noted that, for the orientation words, such as the terms "central", "upper", "lower", "front", "back", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, are only for convenience of describing the present application and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific scope of the present application.

It is noted that the terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.

The terms "comprises," "comprising," and "having," and any variations thereof, in the description and claims of this application, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

The application provides a container valve plug screw, as shown in figure 1, comprising a valve body 1, wherein an inlet 11 and an outlet 12 are arranged on the valve body 1, a cavity 13 is arranged in the valve body 1, and the cavity 13 is respectively communicated with the inlet 11 and the outlet 12;

the pressure cap 2 is connected in the valve body 1 in a threaded manner, a screw plug 21 is arranged in the pressure cap 2, a valve core 211 is movably arranged in the screw plug 21, the valve core 211 and the pressure cap 2 are in sealing fit to form a second valve, and an ejector rod 23 is arranged at the lower end of the screw plug 21; and

the piston 131 is arranged in the chamber 13, the piston 131 is positioned below the pressing cap 2, the piston 131 and the valve body 1 are in sealing fit to form a first valve, the first valve is communicated with the outlet 12 through the opening and closing control inlet 11 or separates the inlet 11 from the outlet 12, the lower end of the piston 131 is provided with a screw 132 in a threaded manner, a first sealing ring 1312 is arranged between the top end of the screw 132 and the piston 131, and a through hole 1321 is formed in the screw 132;

wherein, an air chamber 133 is formed between the pressing cap 2 and the piston 131, the through hole 1321 is communicated with the air chamber 133, a first spring 1331 is arranged in the air chamber 133, the first spring 1331 is abutted between the piston 131 and the pressing cap 2, when the valve core 211 acts, the second valve is opened, the piston 131 moves upwards to open the first valve, and the ejector rod 23 is inserted into the through hole 1321, so that the ejector rod 23 and the first sealing ring 1312 are in sealing fit to form a third valve.

It should be noted that the sealing fit between the valve core 211 and the pressing cap 2 may be a sealing contact manner, and sealing is completed by a pressing manner; the diameter of the through hole 1321 is smaller, the air chamber 133 at the upper end of the piston 131 is communicated with the inlet 11 through the fine through hole 1321 on the screw 132, the inlet 11 is communicated with the fire extinguishing container, and the pressure of the air in the air chamber 133 is the same as the pressure of the air in the inlet 11, but because the stress area of the upper end surface of the piston 131, namely the air chamber 133, is larger than the stress area of the first valve at the lower end surface of the piston 131, the first valve is closed under the action of the air pressure under the normal condition, namely the inlet 11 and the outlet 12 are blocked.

Specifically, as shown in fig. 1, a cavity 210 is formed in the plug screw 21, the valve core 211 is disposed in the cavity 210, a second spring 212 is further disposed in the cavity 210, the second spring 212 provides tension, the second spring 212 enables the valve core 211 to be disposed in the cavity 210 in a pressing manner, and the valve core 211 is conventional in the art, and therefore, detailed description thereof will not be provided in this application.

Specifically, as shown in fig. 2, the plug screw 21 is provided with at least one vent passage 211, and the vent passage 211 communicates the air chamber 133 and the cavity 210.

When the valve core 211 is not actuated, the valve core 211 is in a state where the second valve is closed by the first spring 1331 and the gas in the gas chamber 133, and when the valve core 211 is actuated, that is, when the valve core 211 is pushed open, the high-pressure gas in the gas chamber 133 is released through the vent passage 221 as the second valve is opened, so that the piston 131 moves upward to open the first valve by the pressure of the high-pressure gas in the upper end face bottle and discharges the fire extinguishing agent.

Specifically, a transition portion 22 is disposed between the plug screw 21 and the ejector rod 23, one outlet 12 of the vent passage 211 is disposed on the transition portion 22, and the other outlet 12 is disposed in the cavity 210.

Preferably, the transition portion 22 is disposed at the bottom end of the screw plug 21, and the transition portion 22 extends into the air chamber 133.

Specifically, the transition portion 22 is cylindrical, and the transition portion 22 can be milled to have opposite sides or hexagonal sides, so that the screw plug 21 can be screwed conveniently.

Specifically, as shown in fig. 1, an opening is formed at the top end of the chamber 13, the pressing cap 2 is arranged at the top end of the valve body 1, and the pressing cap 2 is located at the opening.

Specifically, as shown in fig. 2, the screw 132 is screwed to the piston 131, the piston 131 is provided with an opening 1311 communicating with the through hole 1321, and the first seal 1312 is provided in the opening 1311. Preferably, the first seal 1312 is an O-ring.

Specifically, as shown in fig. 1, a second seal ring 24 is provided between the press cap 2 and the valve body 1.

Specifically, the lower end of the ejector rod 23 is conical, and the lower end surface of the ejector rod 23 is a conical surface.

The foregoing has described the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are merely illustrative of the principles of the application, but that various changes and modifications may be made without departing from the spirit and scope of the application, and these changes and modifications are intended to be within the scope of the application as claimed. The scope of protection claimed by this application is defined by the following claims and their equivalents.

Claims

1. A container valve plug screw, comprising:

2. The vessel valve plug screw of claim 1, further comprising: the valve is characterized in that a cavity is formed in the screw plug, the valve core is arranged in the cavity, a second spring is further arranged in the cavity, and the second spring enables the valve core to be tightly arranged in the cavity.

3. The vessel valve plug screw of claim 2, wherein: the screw plug is provided with at least one ventilation channel, and the ventilation channel is communicated with the air chamber and the cavity.

4. A container valve plug screw as defined in claim 3, wherein: a transition part is arranged between the plug screw and the ejector rod, one outlet of the ventilation channel is arranged on the transition part, and the other outlet is arranged in the cavity.

5. The vessel valve plug screw of claim 4, further comprising: the transition portion is cylindric, the transition portion can mill opposite side or hexagonal limit.

6. The vessel valve plug screw of claim 1, further comprising: the top of cavity is equipped with the opening, press the cap to locate the top of valve body, just press the cap to be located the opening part.

7. The vessel valve plug screw of claim 1, further comprising: the screw is in threaded connection with the piston, an opening communicated with the through hole is formed in the piston, and the first sealing ring is arranged in the opening.

8. The vessel valve plug screw of claim 1, further comprising: and a second sealing ring is arranged between the pressing cap and the valve body.

9. The vessel valve plug screw of claim 1, further comprising: the lower end of the ejector rod is conical.