CN217271911U

CN217271911U - Bottle head valve starting device

Info

Publication number: CN217271911U
Application number: CN202123137530.5U
Authority: CN
Inventors: 石瑞君; 郑勤; 张建国
Original assignee: Ningbo Sanan Valve Manufacture Co ltd
Current assignee: Ningbo Sanan Valve Manufacture Co ltd
Priority date: 2021-12-13
Filing date: 2021-12-13
Publication date: 2022-08-23
Anticipated expiration: 2031-12-13

Abstract

The application discloses bottle head valve starting drive includes: the valve body is also internally provided with an air inlet channel, an air outlet channel and a connecting channel; the bottom end of the vent piston can be in contact with the valve body and close the connecting channel, a pressure relief channel is formed on the vent piston, and a first spring which is connected with the valve body in a matched mode is arranged at the upper end of the vent piston; and the starting mechanism is movably arranged in the mounting cavity and comprises a connecting rod, a driving part, a first sealing part, a second sealing part and a second spring, the first sealing part isolates the mounting cavity from the outside in an initial state, the second spring is matched and connected with the valve body, and the second sealing part is suitable for being in sealing fit with the pressure relief channel. This application makes actuating mechanism start-up back bottle head valve door can open completely, guarantees that fire extinguishing agent spouts and puts, avoids the fire extinguisher to block the condition that can't use, has improved the security.

Description

Bottle head valve starting device

Technical Field

The application relates to the technical field of bottle head valves, in particular to a starting device of a bottle head valve.

Background

The bottle head valve starting device has the following functions: the starting mechanism is arranged in the inner hole of the screw plug and can slide up and down in the inner hole of the screw plug; the starting mechanism is screwed on the pressing cap through a plug screw thread and is propped against the pressing cap by a spring, and the starting mechanism is in sealing contact with an orifice of the pressing cap to form a starting valve; when a fire is alarmed, the starting device arranged in the pressure cap is jacked up through a pneumatic or electric pilot valve, the valve at the starting device is opened, and the gas in the gas chamber of the bottle head valve is discharged through the valve at the starting device and the pressure cap discharge port through the screw plug channel, so that the gas pressure exerted on the piston in the gas chamber is reduced, and pressure difference is generated on the piston under the action of high-pressure gas in the bottle; the piston is opened to spray the fire extinguishing agent.

A prior art cylinder valve, as shown in fig. 1, a prior art cylinder valve includes: the device comprises a pressing cap, a starting mechanism, a compression screw, a gasket, a spring, a piston, a screw plug and a valve body; the piston is arranged in the valve body, a sealing element at the lower end of the piston is in sealing contact with the valve body to form a first valve, a spring II is arranged at the upper end of the piston, the spring II is spliced in the valve body by a pressing cap thread, a starting mechanism is arranged in the pressing cap, a sealing element on the starting mechanism is in sealing contact with the pressing cap to form a second valve, a spring I is arranged at the lower end of the starting device to be abutted against the spring II and is screwed in the pressing cap by a plug screw thread, and the starting device can slide in the plug screw up and down under the action of the spring and external force; the starting device is jacked up through a pneumatic or electric pilot valve, and a second valve is opened; the gas releasing chamber pressurizes the gas on the piston, and pressure difference is generated between the upper surface and the lower surface of the piston under the action of high-pressure gas in the bottle; the piston moves upwards until the inner hole of the piston is sleeved into the mandril at the lower end of the screw plug, the gas channel of the small hole on the compression screw is blocked, the valve is completely opened, and the extinguishing agent is sprayed.

However, the fire extinguisher with the structure has the following disadvantages when the valve of the bottle head valve is opened: because the screw on the piston is provided with the tiny hole, the steel cylinder provided with the cylinder head 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 valve at the lower end of the piston); when the second valve at the starting device is opened, the high-pressure gas in the gas chamber at the upper end of the piston is reduced in pressure along with the starting and discharging of the starting device, 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 first valve. When the gas in the screw plug channel and the valve core channel is not discharged timely or the screw small hole on the piston has a flow larger than the discharge flow under the action of high-pressure gas; firstly, the piston does not move upwards and does not open the first valve; and secondly, the piston moves upwards and moves downwards to be closed when the piston inner hole is not yet sleeved into the mandril at the lower end of the screw plug.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model aims to provide a bottle hair starting device, a bottle valve can be completely opened after the starting mechanism is started, fire extinguishing agent is guaranteed to be sprayed, the condition that the fire extinguisher cannot be used is avoided, and the safety is improved.

To achieve the above object, the present application provides a head valve actuating apparatus, comprising: the mounting cavity is formed in the valve body of the bottle head valve, and an air inlet channel, an air outlet channel and a connecting channel communicated with the air inlet channel and the air outlet channel are formed in the valve body; the bottom end of the vent piston can be in contact with the valve body and close the connecting channel, a pressure relief channel is formed in the vent piston and is respectively communicated with the air inlet channel and the mounting cavity, and a first spring which is connected with the valve body in a matched mode is arranged at the upper end of the vent piston; and the starting mechanism is movably arranged in the mounting cavity and comprises a connecting rod, a driving part, a first sealing part, a second sealing part and a second spring, the driving part, the first sealing part, the second sealing part and the second spring are arranged on the connecting rod, the mounting cavity is isolated from the outside in an initial state, the second spring is matched and connected with the valve body, the second sealing part is suitable for being matched with the pressure relief channel in a sealing manner, the driving part drives the connecting rod to drive the first sealing part and the second sealing part to move downwards and compress the second spring, the first sealing part moves downwards to enable the mounting cavity to be communicated with the outside, and under the action of air pressure, the vent piston moves upwards to open the connecting channel and enable the second sealing part to be inserted into the pressure relief channel to isolate the air inlet channel from the mounting cavity.

Compared with the prior art, the beneficial effect of this application lies in: under the starting state, the driving part drives the first sealing part and the second sealing part to move downwards, the first sealing part moves downwards to enable the installation cavity to be communicated with the outside, because the stress area of the upper end of the ventilating piston is larger than the stress area of the lower end of the ventilating piston, the pressure of the lower end of the ventilating piston is larger than the pressure of the upper end of the ventilating piston under the action of high-pressure gas, the piston moves upwards to open the connecting channel, the second sealing part moves downwards to be inserted into the pressure relief channel to isolate the air inlet channel from the installation cavity, at the moment, the pressure in the installation cavity is reduced, the ventilating piston moves upwards under the action of the high-pressure gas at the lower end to completely open the connecting channel, so that the fire extinguishing agent can be smoothly sprayed, after the fire extinguishing agent is sprayed and discharged, the ventilating piston moves downwards under the action of a first spring to close the connecting channel, and simultaneously, the first sealing part and the second sealing part move upwards to isolate the installation cavity from the outside, and completing automatic reset.

As an improvement, the hydraulic pressure relief device further comprises a guide piston, the guide piston is movably arranged in the installation cavity, a containing cavity communicated with the outside is formed in the guide piston, the connecting rod penetrates through the guide piston, the driving part is located in the containing cavity, the second spring is abutted between the driving part and the guide piston, the first sealing part and the second sealing part are located at the bottom of the connecting rod, the first sealing part and the bottom of the guide piston are abutted and matched to isolate the installation cavity from the outside, through the improvement, the guide piston is movably arranged in the installation cavity, the moving flexibility of the starting mechanism can be improved, the moving limit distance of the first sealing part and the moving limit distance of the second sealing part can be improved, the machining size of the first sealing part can be adjusted more flexibly, and the sealing matching of the guide piston and a channel has a wider selection range in process size pressure relief, the processing degree of difficulty has been reduced to further guarantee that first sealing and pressure release channel can sealed cooperation.

As an improvement, the bottom of the guide piston is provided with a through hole for the connecting rod to pass through, a gap is reserved between the through hole and the connecting rod, and when the first sealing part is in tight fit with the bottom of the piston in a propping manner, the gap is sealed by the first sealing part.

As the improvement, still including pressing cap and lock nut, press the cap with valve body threaded connection, just press the sealed setting of cap to be in the open-top department of installation cavity, the spacing hole has been seted up in pressing the cap, lock nut threaded connection is in spacing downthehole, the direction piston activity set up in spacing downthehole, through the aforesaid improvement, press the cap to pass through the screw assembly on the valve body, lock nut passes through the screw assembly and is pressing the cap, and the direction piston is spacing in spacing downthehole to restrict it through lock nut and break away from spacing hole, it separately sets up and can not only distribute guarantee sealing performance, also can simplify assembly methods and production technology simultaneously, has ensured the production precision of product.

As an improvement, a first sealing ring is arranged between the guide piston and the pressing cap, a second sealing ring is arranged between the pressing cap and the inner wall of the valve body, and the first sealing ring and the second sealing ring are arranged between the guide piston and the pressing cap and between the pressing cap and the valve body to respectively ensure that no gas flows, so that the sealing performance of the whole device is further ensured.

As an improvement, the bottom of the pressure cap is provided with a gasket, the first spring is abutted between the gasket and the vent piston, and through the improvement, the first spring is arranged between the pressure cap and the vent piston, and the gasket is arranged at the bottom of the pressure cap, so that the damage of the vent piston can be effectively avoided when the top end of the vent piston is abutted against the bottom end of the pressure cap, and the service life of the vent piston is prolonged.

As an improvement, a sealing element is arranged at the bottom end of the ventilation piston and is abutted and matched with the outlet end of the air inlet channel to close the connecting channel, and through the improvement, the sealing element is abutted to the outlet end of the air inlet channel to close the connecting channel, so that the sealing performance can be further guaranteed.

As an improvement, the bottom of the vent piston is in threaded connection with a screw, the vent piston is provided with a first vent hole, the screw is provided with a second vent hole communicated with the air inlet channel, the first vent hole and the second vent hole are communicated with each other to form the pressure relief channel, through the improvement, the screw and the vent piston are assembled through threads, the assembly mode is simple, the second vent hole of the screw and the first vent hole in the vent piston form the pressure relief channel, and the combined assembly is not only convenient to separately process, but also convenient to assemble and disassemble.

As the improvement, a third sealing ring is arranged between the ventilating piston and the screw, and through the improvement, the third sealing ring can further ensure to isolate the gap between the piston and the screw after the assembly is completed.

As the improvement, a fourth sealing ring is arranged between the vent piston and the inner wall of the valve body, and through the improvement, the fourth sealing ring can prevent gas from entering the mounting cavity through a gap between the vent piston and the valve body when the vent piston moves, so that the sealing performance is further improved.

Drawings

FIG. 1 is a schematic sectional view showing the overall structure of a cylinder valve according to the prior art;

FIG. 2 is a schematic cross-sectional view of the overall structure with the cylinder valve of the present application;

fig. 3 is a partially enlarged view of a in fig. 2.

In the figure: 1. a valve body; 11. an air intake passage; 12. an air outlet channel; 13. a connecting channel; 14. a mounting cavity; 2. a breather piston; 20. a pressure relief channel; 21. a first air vent; 22. a first spring; 23. a seal member; 3. a screw; 31. a second vent hole; 4. a connecting rod; 41. a drive section; 42. a first seal portion; 43. a second seal portion; 44. a second spring; 5. pressing the cap; 51. a limiting hole; 52. a gasket; 6. locking the nut; 7. a pilot piston; 71. a cavity; 72. a through hole; 81. a first seal ring; 82. a second seal ring; 83. a third seal ring; 84. and a fourth sealing 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 bottle head valve starting device, as shown in fig. 2 and 3, which comprises a mounting cavity 14, a vent piston 2 and a driving mechanism, wherein the mounting cavity 14 is arranged in a valve body 1 of the bottle head valve, and the valve body 1 is also internally provided with an air inlet channel 11, an air outlet channel 12 and a connecting channel 13 communicated with the air inlet channel 11 and the air outlet channel 12; the vent piston 2 is movably arranged in the mounting cavity 14, the bottom end of the vent piston 2 can be in contact with the valve body 1 and close the connecting channel 13, a pressure relief channel 20 is formed on the vent piston 2, the pressure relief channel 20 is respectively communicated with the air inlet channel 11 and the mounting cavity 14, and a first spring 22 which is in matched connection with the valve body 1 is arranged at the upper end of the vent piston 2; the starting mechanism is movably arranged in the mounting cavity 14 and comprises a connecting rod 4, a driving portion 41 arranged on the connecting rod 4, a first sealing portion 42, a second sealing portion 43 and a second spring 44, in an initial state, the first sealing portion 42 isolates the mounting cavity 14 from the outside, the second spring 44 is connected with the valve body 1 in a matched mode, the second sealing portion 43 is suitable for being matched with the pressure relief channel 20 in a sealing mode, in a starting state, the driving portion 41 drives the connecting rod 4 to drive the first sealing portion 42 and the second sealing portion 43 to move downwards and compress the second spring 44, the first sealing portion 42 moves downwards to enable the mounting cavity 14 to be communicated with the outside, in addition, under the action of air pressure, the vent piston 2 moves upwards to open the connecting channel 13, in addition, the second sealing portion 43 is inserted into the pressure relief channel 20, and accordingly the air inlet channel 11 and the mounting cavity 14 are isolated.

It should be noted that, in case of fire, the start mechanism installed in the pressure cap 5 can be pushed open by the pneumatic or electric pilot valve, and the driving part 41 is driven to move downward, so that the fire extinguishing agent is sprayed.

Specifically, as shown in fig. 3, the driving portion 41 is disposed at the top of the connecting rod 4, the first sealing portion 42 and the second sealing portion 43 are disposed at the bottom of the connecting rod 4, the second sealing portion 43 is disposed at the lower side of the first sealing portion 42, a through hole 72 for the connecting rod 4 to pass through is formed in the bottom of the guide piston 7, a gap is formed between the through hole 72 and the connecting rod 4, and when the first sealing portion 42 and the piston bottom are in tight fit, the first sealing portion 42 seals the gap.

As shown in fig. 3, the valve further comprises a pressing cap 5 and a locking nut 6, the pressing cap 5 is in threaded connection with the valve body 1, the pressing cap 5 is arranged at the opening of the top of the installation cavity 14 in a sealing mode, a limiting hole 51 is formed in the pressing cap 5, the locking nut 6 is in threaded connection with the limiting hole 51, the guide piston 7 is movably arranged in the limiting hole 51, and the locking nut 6 limits the guide piston 7 to be separated from the limiting hole 51.

Specifically, a first sealing ring 81 is arranged between the guide piston 7 and the pressing cap 5, and a second sealing ring 82 is arranged between the pressing cap 5 and the inner wall of the valve body 1.

Preferably, the bottom end of the pressing cap 5 is provided with a gasket 52, and the first spring 22 is abutted between the gasket 52 and the vent piston 2.

Specifically, the bottom end of the vent piston 2 is provided with a sealing member 23, and the sealing member 23 is in tight fit with the outlet end of the air inlet channel 11 to close the connecting channel 13.

Specifically, as shown in fig. 3, a screw 3 is connected to the bottom of the vent piston 2 in a threaded manner, a first vent hole 21 is formed in the vent piston 2, a second vent hole 31 communicated with the air inlet channel 11 is formed in the screw 3, and the first vent hole 21 and the second vent hole 31 are communicated with each other to form the pressure relief channel 20.

Specifically, a third seal ring 83 is provided between the vent piston 2 and the screw 3.

Specifically, a fourth sealing ring 84 is arranged between the vent piston 2 and the inner wall of the valve body 1.

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 cylinder head valve actuating apparatus, comprising:

the mounting cavity is arranged in the valve body of the bottle head valve, and an air inlet channel, an air outlet channel and a connecting channel communicated with the air inlet channel and the air outlet channel are also formed in the valve body;

the bottom end of the vent piston can be in contact with the valve body and close the connecting channel, a pressure relief channel is formed in the vent piston and is respectively communicated with the air inlet channel and the mounting cavity, and a first spring which is connected with the valve body in a matched mode is arranged at the upper end of the vent piston; and

the starting mechanism is movably arranged in the installation cavity and comprises a connecting rod and a driving portion, a first sealing portion, a second sealing portion and a second spring, wherein the driving portion, the first sealing portion, the second sealing portion and the second spring are arranged on the connecting rod, the first sealing portion is isolated from the outside, the second spring is connected with the valve body in a matched mode, the second sealing portion is suitable for being matched with the pressure relief channel in a sealing mode, and under the starting state, the driving portion drives the connecting rod to drive the first sealing portion and the second sealing portion to move downwards and compress the second spring, the first sealing portion moves downwards to enable the installation cavity to be communicated with the outside, and under the action of air pressure, the ventilation piston moves upwards to open the connection channel, and the second sealing portion is inserted into the pressure relief channel to be isolated from the air inlet channel and the installation cavity.

2. The cylinder head valve actuating apparatus as defined in claim 1, wherein: still include the guide piston, the guide piston movably set up in the installation cavity, set up the appearance chamber with external intercommunication in the guide piston, the connecting rod passes the guide piston, just the drive site is located hold the intracavity, the second spring supports and establishes the drive division with between the guide piston, first sealing with the second sealing is located the bottom of connecting rod, just first sealing with the tight fit in order to completely cut off is supported to the bottom of guide piston the installation cavity with external.

3. The cylinder head valve actuating apparatus as defined in claim 2, wherein: the bottom of the guide piston is provided with a through hole for the connecting rod to pass through, a gap is reserved between the through hole and the connecting rod, and when the first sealing part is in tight fit with the bottom of the piston, the first sealing part seals the gap.

4. The cylinder head valve actuating apparatus as defined in claim 2, wherein: the valve body is provided with a mounting cavity, the mounting cavity is provided with a top opening, the top opening is provided with a limiting hole, the valve body is provided with a valve seat, the valve seat is provided with a valve body, the valve body is provided with a valve seat, the valve seat is provided with a valve seat, the valve body is provided with a valve seat, the valve body is provided with a valve seat, the valve body is provided with a limiting hole, the valve seat, the valve body, the valve seat, the valve body is provided with a limiting hole, the limiting hole is formed in the limiting hole, the limiting hole is formed in the limiting hole, the limiting hole is formed in the limiting hole, the guiding piston is formed in the limiting hole, and the limiting hole, the limiting hole is formed in the limiting hole, the guiding piston is formed in the limiting hole, and the limiting hole, the limiting hole is formed in the limiting hole, the guide.

5. The cylinder head valve actuating apparatus as defined in claim 4, wherein: and a first sealing ring is arranged between the guide piston and the pressing cap, and a second sealing ring is arranged between the pressing cap and the inner wall of the valve body.

6. The cylinder head valve actuating apparatus as defined in claim 4, wherein: the bottom of the pressure cap is provided with a gasket, and the first spring is abutted between the gasket and the vent piston.

7. The cylinder head valve actuating apparatus as defined in claim 1, wherein: and a sealing piece is arranged at the bottom end of the vent piston and is in abutting fit with the outlet end of the air inlet channel so as to close the connecting channel.

8. The cylinder head valve actuating apparatus as defined in claim 1, wherein: the bottom of the ventilating piston is in threaded connection with a screw, a first ventilating hole is formed in the ventilating piston, a second ventilating hole communicated with the air inlet channel is formed in the screw, and the first ventilating hole and the second ventilating hole are communicated with each other to form the pressure relief channel.

9. The cylinder head valve actuating apparatus as defined in claim 8, wherein: and a third sealing ring is arranged between the vent piston and the screw.

10. The cylinder head valve actuating apparatus as defined in claim 1, wherein: and a fourth sealing ring is arranged between the vent piston and the inner wall of the valve body.