CN110005863B

CN110005863B - Fire extinguisher valve control structure

Info

Publication number: CN110005863B
Application number: CN201910293169.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zongda Electric Co ltd
Current assignee: Zongda Electric Co.,Ltd.
Priority date: 2019-04-12
Filing date: 2019-04-12
Publication date: 2020-09-08
Anticipated expiration: 2039-04-12
Also published as: CN110005863A

Abstract

The invention relates to the technical field of fire fighting equipment and discloses a valve control structure of a fire extinguisher, which comprises a valve sleeve, a valve core and a valve rod, wherein the valve rod is movably sleeved with the valve core, an upper pressure plate and a lower pressure plate are fixedly sleeved outside the valve rod and positioned on the upper side and the lower side of the valve core respectively, the upper pressure plate is used for driving the valve core to move downwards, the lower pressure plate is used for driving the valve core to move upwards, a rubber ring I is fixedly connected to the bottom end of the valve core and positioned on the periphery of the valve rod, and a rubber ring II arranged corresponding to the rubber ring I is arranged at the top end of. According to the invention, the valve core and the valve rod are movably sleeved, the upper pressing plate and the lower pressing plate which are positioned on the upper side and the lower side of the valve core are respectively used for controlling the valve rod to operate the valve core to move up and down, the air pressures on the upper side and the lower side of the valve core are balanced by separating the lower pressing plate and the valve core, the pressing resistance of a pressing handle caused by the pressure difference between the inside and the outside of a bottle is greatly reduced while the sealing performance is ensured, and the sealing structure for manually pressing the valve rod to open.

Description

Fire extinguisher valve control structure

Technical Field

The invention relates to the technical field of fire fighting equipment, in particular to a valve control structure of a fire extinguisher.

Background

The fire extinguisher is a portable fire extinguishing tool, and can be divided into fire extinguishers such as foam, dry powder, carbon dioxide, clear water and the like according to fire extinguishing agents filled in the fire extinguisher, wherein the fire extinguishers are different in type and the adopted fire extinguisher bottle mouth valves are different. For carbon dioxide gas fire extinguishers, carbon dioxide gas is compressed in a bottle for storage, a pressing handle is pressed down during use, the gas in the bottle is gasified and released, the requirement on the sealing performance of the bottle mouth of the fire extinguisher is high during daily storage, the traditional valve sealing structure is used in a low-temperature environment below-20 ℃, and the problem of fire extinguisher leakage can occur.

However, the above valve sealing structure still has the following problems:

1. because the lower sealing ring of the valve rod is tightly pushed by the first return spring and because of the existence of high-pressure gas in the bottle cavity, the upper surface and the lower surface of the lower sealing ring of the valve rod have air pressure difference, and the air pressure difference can further tightly push the lower sealing ring of the valve rod on the conical surface of the bottle neck part, so that the sealing effect is realized, however, when the lower sealing ring of the valve rod is used in a fire disaster, an operator manually presses the pressing handle to enable the valve rod to drive the valve core to move downwards, and the pressure formed by the elasticity of the first return spring and the air pressure difference needs to be overcome manually, so that the problem that the valve is difficult to open at the initial stage of equipment;

2. the existence of self-adaptation on-off mechanism for press the in-process of pushing down, the valve rod upper seal circle that expands gradually increases with the inner wall friction increase of bottleneck, the manual pressure of applying pressure of pressing the handle has further been increased again, make the operation of putting out a fire of equipment hard, unfavorable to handling dangerous situation, and simultaneously, because the fire extinguisher is arranged in one department, generally can start at a short time, the storage time is longer, complicated linkage structure easily causes the gas circuit to block up unsmoothly, finally be difficult to press and move the pressure handle, make the fire extinguisher inefficacy, the potential safety hazard is big.

Therefore, a fire extinguisher valve control structure is provided, and aims to solve the problems.

Disclosure of Invention

Aiming at the defects of the existing fire extinguisher valve structure in the use process in the background technology, the invention provides a fire extinguisher valve control structure, which has the advantages of labor saving in operation, convenience in production and manufacture and low potential safety hazard and solves the problems in the background technology.

The invention provides the following technical scheme: the utility model provides a fire extinguisher valve control structure, includes valve barrel, case and valve rod, the valve rod cup joints with the case activity, top board and holding down plate have been fixed respectively to the outside of valve rod and the upper and lower both sides that are located the case, the top board is used for driving the case and moves down, the holding down plate is used for driving the case and shifts up, the bottom of case and the periphery fixedly connected with rubber ring I that is located the valve rod, the top of holding down plate is equipped with rubber ring II with the corresponding arrangement of rubber ring I, rubber ring I forms seal structure with the contact of rubber ring II, the bottom of holding down plate is equipped with sealed reset spring.

Preferably, the inner wall top of valve barrel is equipped with the seal neck, the outside of valve rod and the upper and lower both sides that are located the seal neck are equipped with sealing plug and neck seal stopper respectively, the sealing plug cup joints with the valve rod is fixed, neck seal stopper cup joints with the valve rod activity, the outside of valve rod and the below that is located the neck seal stopper are equipped with the stopper.

Preferably, the vertical distance between the upper pressure plate and the lower pressure plate is higher than the height of the valve core.

Preferably, the distance of the sleeving clearance between the valve rod and the valve core is 1/4-1/3 of the radius of the valve rod.

The invention has the following beneficial effects:

1. according to the invention, the valve core and the valve rod are movably sleeved, the upper pressing plate and the lower pressing plate which are positioned on the upper side and the lower side of the valve core are respectively used for controlling the valve rod to operate the valve core to move up and down, the air pressures on the upper side and the lower side of the valve core are balanced by separating the lower pressing plate and the valve core, the pressing resistance of a pressing handle caused by the pressure difference between the inside and the outside of a bottle is greatly reduced while the sealing performance is ensured, and the sealing structure for manually pressing the valve rod to open.

2. According to the invention, the sealing neck is arranged at the top end of the inner cavity of the valve sleeve, the sealing plug and the neck sealing plug are respectively arranged at the upper part and the lower part of the sealing neck, and the neck sealing plug is movably sleeved with the valve rod, namely, when the valve rod moves downwards to open the valve, the sealing plug is tightly attached and sealed with the upper top of the sealing neck, and meanwhile, the neck sealing plug is tightly attached to the lower surface of the sealing neck under the impact action of high air pressure in the bottle, so that under double sealing, the sealing performance of the bottleneck opening part of the fire extinguisher in the use stage can be ensured, the structure is simple to arrange, the resistance of the downward pressing of the valve rod cannot be increased, and.

Drawings

FIG. 1 is a cross-sectional view of the structure of the present invention;

FIG. 2 is a schematic view of the valve cartridge of the present invention in a partially enlarged view;

FIG. 3 is an enlarged partial view of the closure neck of the present invention.

In the figure: 1. an upright tube; 2. a valve housing; 3. an air outlet cavity; 4. a valve core; 4a, a chassis; 4b, a rubber plug; 5. a valve stem; 6. an upper pressure plate; 7. a lower pressing plate; 8. a seal return spring; 9. a sealing neck; 10. a sealing plug; 11. sealing a neck plug; 12. a rubber ring I; 13. a rubber ring II; 14. and a limiting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-3, a fire extinguisher valve control structure comprises an upright tube 1, a valve sleeve 2 in threaded connection with the top of the outer side of the upright tube 1, a horizontal air outlet cavity 3 and a longitudinal sealing cavity are arranged at the top of the inner cavity of the valve sleeve 2, a valve core 4 is arranged at the lower side of the air outlet cavity 3 and at the position of the change of the cross section of the inner cavity of the valve sleeve 2, the outer surface of the valve core 4 is a conical surface and is matched with the inner wall of the valve sleeve 2 to form a structural sealing surface, a valve rod 5 is arranged in the longitudinal sealing cavity of the valve sleeve 2, the valve rod 5 is movably sleeved with the valve core 4 and penetrates through the valve core 4, the valve rod 5 can move up and down relative to the valve core 4, an upper pressure plate 6 and a lower pressure plate 7 are respectively and fixedly sleeved at the upper side and the lower side of the valve core 4 outside of the valve rod 5, wherein, the lower pressure plate 7 and the valve, the lower part of the lower pressing plate 7 is provided with a sealing reset spring 8, the bottom end of the sealing reset spring 8 is arranged on a flange of the inner wall of the vertical pipe 1, the sealing reset spring 8 generates upward elastic thrust to the lower pressing plate 7, the inner wall of the top end of a longitudinal sealing cavity of the valve sleeve 2 and the upper side of the air outlet cavity 3 are provided with a sealing neck 9, the sealing neck 9 can be integrally formed with the valve sleeve 2, the upper surface and the lower surface of the sealing neck 9 are inwards concave conical surfaces, the valve rod 5 penetrates through the inside of the sealing neck 9, the outside of the valve rod 5 and the upper side and the lower side of the sealing neck 9 are respectively provided with a sealing plug 10 and a sealing plug 11, the sealing plug 10 is tightly sleeved with the valve rod 5 by screw threads, the sealing plug 11 is movably sleeved with the valve rod 5, the contact surfaces of the sealing plug 10 and the sealing plug 11 and the valve rod 5 are conical surfaces matched with each other, wherein, the sealing plug 11 is fixedly provided with two mutually symmetrical limiting blocks 14 outside, for limiting the downward movement of the neck seal 11.

Wherein, case 4 includes chassis 4a and plug 4b, and the top of chassis 4a cup joints inlays and establishes plug 4b, and chassis 4a is used for thread tightening case 4 and valve rod 5, and plug 4b is used for sticising sealedly. The sealing plug 10 is constructed similarly to the valve core 4.

Wherein, the distance from the top end of the neck sealing plug 11 to the bottom end of the neck sealing plug 9 is always larger than the distance from the top end of the lower pressure plate 7 to the bottom end of the valve core 4. When the lower pressure plate 7 tightly pushes the valve core 4 against the inner wall of the valve sleeve 2, the neck sealing plug 11 and the sealing return spring 8 still have a relative movement distance, so that the precondition of pressure sealing of the rubber plug 4b can be guaranteed.

Wherein, the bottom surface of plug 4b is equipped with rubber ring I12, and the top surface of holding down plate 7 is equipped with rubber ring II 13, and rubber ring I12 forms seal structure with rubber ring II 13 under the contact.

The radial distance of the sleeving gap between the valve rod 5 and the valve core 4 is 1/4-1/3 of the radius of the valve rod 5, the setting of the gap value can ensure that the pressure difference acts on the annular surface of the gap to form smaller resistance, and meanwhile, the gas in the vertical pipe 1 is enabled to be rapidly introduced into the upper part of the valve core 4 through the gap so as to achieve the effect of pressure balance and drag reduction.

The valve core 4 and the valve rod 5 are sleeved in a reserved sleeving gap, and the formula F is P.S, namely the resistance value of the pressure difference acting on the lower pressing plate 7 is the annular area of the gap where the valve rod 5 and the valve core 4 are sleeved, so that compared with the traditional setting of the fixed connection of the valve rod 5 and the valve core 4, the method can greatly reduce the acting area of the pressure difference, thereby reducing the resistance action, and therefore, when the valve rod 5 is pressed, only the elastic force of the sealing return spring 8 and the smaller pressure difference resistance need to be overcome, and the labor is saved.

The using method of the invention is as follows:

when the fire extinguisher is stored, the lower pressure plate 7 is jacked upwards by the sealing return spring 8, the valve core 4 is jacked to the conical surface of the inner wall of the valve sleeve 2 by the lower pressure plate 7 to seal the conical surface, and meanwhile, the rubber ring I12 is in contact fit with the rubber ring II 13 to seal the sleeving gap between the valve rod 5 and the valve core 4; when the fire extinguisher is used, the safety pin is opened, the pressing handle is pressed to press the valve rod 5 downwards, the valve core 4 does not leave the inner wall conical surface of the valve sleeve 2 under the action of pressure difference, the lower pressing plate 7 is pushed to leave relative to the valve core 4, the rubber ring I12 is separated from the rubber ring II 13, high-pressure gas in the vertical pipe 1 enters the upper part of the valve core 4 from the gap between the valve rod 5 and the valve core 4, the space of the upper part of the valve core 4 is small due to the small space of the upper part of the valve core 4, the air pressure in the upper part of the valve core 4 instantly reaches the air pressure of the lower part of the valve core 4, the pressing handle is continuously pressed, the upper pressing plate 6 is contacted with the valve core 4 to drive the valve core 4 to move downwards, the sealing port at the inner wall conical surface of the valve sleeve 2 is thoroughly opened, at the moment, the sealing plug 10 is pressed to be abutted with the upper top surface of the sealing neck 9 for sealing, the sealing, sealing; after the use is finished, the pressing handle is released, the lower pressing plate 7 moves upwards under the action of the elastic force of the sealing return spring 8 to be attached to the valve core 4, the rubber ring I12 is attached to the rubber ring II 13 to drive the valve core 4 to move upwards continuously, the valve core 4 is attached to the conical inclined surface of the inner wall of the valve sleeve 2 to finish sealing, the sealing plug 10 is also separated from the top surface of the opening neck 9, and the neck sealing plug 11 falls onto the limiting block 14 due to self weight; when the valve is installed, the sealing plug 10 is firstly screwed off, the valve rod 5 is inserted from the lower part of the valve sleeve 2, then the sealing plug 10 is screwed on, then the valve core 4 is sleeved, the upper pressing plate 7 is screwed on, the sealing return spring 8 is installed, and finally the valve sleeve 2 is screwed and fixed outside the vertical pipe 1.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a fire prevention ware valve control structure disappears, includes valve barrel (2), case (4) and valve rod (5), its characterized in that: the valve rod (5) is movably sleeved with the valve core (4), an upper pressing plate (6) and a lower pressing plate (7) are fixedly sleeved outside the valve rod (5) and are positioned on the upper side and the lower side of the valve core (4) respectively, the upper pressing plate (6) is used for driving the valve core (4) to move downwards, the lower pressing plate (7) is used for driving the valve core (4) to move upwards, a rubber ring I (12) is fixedly connected to the bottom end of the valve core (4) and is positioned on the periphery of the valve rod (5), a rubber ring II (13) arranged corresponding to the rubber ring I (12) is arranged at the top end of the lower pressing plate (7), the rubber ring I (12) and the rubber ring II (13) are in contact to form a sealing structure, and a sealing reset spring (8) is arranged at the bottom;

a sealing neck (9) is arranged at the top end of the inner wall of the valve sleeve (2), a sealing plug (10) and a sealing neck plug (11) are respectively arranged outside the valve rod (5) and positioned at the upper side and the lower side of the sealing neck (9), the sealing plug (10) is fixedly sleeved with the valve rod (5), the sealing neck plug (11) is movably sleeved with the valve rod (5), and a limiting block (14) is arranged outside the valve rod (5) and positioned below the sealing neck plug (11);

when the fire extinguisher is stored, the lower pressure plate (7) is upwards jacked up by the sealing return spring (8), the valve core (4) is jacked to the conical surface of the inner wall of the valve sleeve (2) by the lower pressure plate (7) to seal the conical surface, and meanwhile, the rubber ring I (12) is in contact fit with the rubber ring II (13) to seal the sleeving gap between the valve rod (5) and the valve core (4); when the fire extinguisher is used, the safety pin is opened, the pressing handle is pressed, the valve rod (5) is pressed down, the valve core (4) does not leave the inner wall conical surface of the valve sleeve (2) due to the action of pressure difference, the lower pressing plate (7) is pushed to leave relative to the valve core (4), the rubber ring I (12) is separated from the rubber ring II (13), high-pressure gas in the vertical pipe (1) enters the upper part of the valve core (4) from the gap between the valve rod (5) and the valve core (4), the space on the upper part of the valve core (4) is small, the space air pressure on the upper part of the valve core (4) instantly reaches the air pressure on the lower part of the valve core (4), the pressing handle is continuously pressed, the upper pressing plate (6) is contacted with the valve core (4) to drive the valve core (4) to move downwards, the sealing port on the inner wall conical surface of the valve sleeve (2) is completely opened, at the moment, the sealing plug, sealing, wherein gas in the vertical pipe (1) is discharged from the gas outlet cavity (3) and impacts the neck sealing plug (11) at the same time, so that the neck sealing plug (11) is attached to the lower surface of the sealing neck (9) for sealing; after the use is finished, the pressing handle is released, the lower pressing plate (7) moves upwards under the action of the elastic force of the sealing return spring (8) to be attached to the valve core (4), the rubber ring I (12) is attached to the rubber ring II (13) to drive the valve core (4) to move upwards continuously, the valve core (4) is attached to the conical inclined surface of the inner wall of the valve sleeve (2) to finish sealing, the sealing plug (10) is also separated from the top surface of the unsealing opening neck (9), and the sealing neck plug (11) falls onto the limiting block (14) under the self-weight; when the valve is installed, the sealing plug (10) is firstly screwed off, the valve rod (5) is inserted from the lower part of the valve sleeve (2), then the sealing plug (10) is screwed on, then the valve core (4) is sleeved on, the lower pressing plate (7) is screwed on, the sealing return spring (8) is installed, and finally the valve sleeve (2) is screwed and fixed outside the vertical pipe (1).

2. The valve control structure of a fire extinguisher according to claim 1, wherein: the vertical distance between the upper pressure plate (6) and the lower pressure plate (7) is higher than the height of the valve core (4).

3. The valve control structure of a fire extinguisher according to claim 1, wherein: the distance of a sleeving clearance between the valve rod (5) and the valve core (4) is 1/4-1/3 of the radius of the valve rod (5).