CN214860755U

CN214860755U - Valve structure of dry powder fire extinguisher

Info

Publication number: CN214860755U
Application number: CN202120846157.1U
Authority: CN
Inventors: 王苗泉; 何梦佳; 潘小明; 何行成; 余钟清
Original assignee: Ningbo Kaituo Valve Co ltd
Current assignee: Ningbo Kaituo Valve Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-11-26
Anticipated expiration: 2031-04-23

Abstract

The utility model discloses a valve structure of a dry powder fire extinguisher, which comprises a valve main body connected above a bottle body of the fire extinguisher, wherein the valve main body comprises a shell, a first cavity is arranged in the shell, a jet orifice is arranged on the side wall, and the jet orifice extends inwards to form a jet passage communicated with the first cavity; the valve rod structure is arranged in the first cavity and penetrates through the shell and is used for opening and closing the jet orifice; the valve handle is arranged above the shell, is connected with the valve rod structure and is used for opening the valve rod structure; the valve handle comprises a lower handle rotationally connected with the shell and an upper handle rotationally connected with the shell and used for extruding the valve rod structure; the lower handle is rotatably connected with the housing through a connecting piece, and the lower handle rotates towards the lower side direction by taking the connecting piece as a center. The rotatable lower part handle is arranged on the valve main body, so that the occupied space of the whole fire extinguisher is small after rotation, the whole fire extinguisher can be easily stored in the safety housing, the occupied space is reduced, and the safety performance of the fire extinguisher is also improved.

Description

Valve structure of dry powder fire extinguisher

Technical Field

The utility model relates to a technical field of fire extinguisher especially relates to a valve structure of dry powder fire extinguisher.

Background

The valve is suitable for small portable dry powder fire extinguishers and is suitable for environments such as kitchens, automobiles and the like. The common portable dry powder fire extinguisher has larger appearance volume and wide occupied space; are not well suited for small spaces such as automobiles, and are directly exposed to the outside to cause unsafe factors such as vibration or collision of vehicles, etc. This just needs to accomodate portable dry chemical extinguisher and deposits in accomodating the casing, and current portable dry chemical extinguisher is because the volume is great, accomodates comparatively difficultly.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The to-be-solved technical problem of the utility model is to provide a valve structure of dry powder fire extinguisher, this valve main part is provided with rotatable lower part handle, makes holistic dry powder fire extinguisher's occupation space little after rotating, can accomodate to the safety housing easily in, has not only reduced occupation space, has still improved dry powder fire extinguisher's security performance.

(II) technical scheme

The utility model provides a scheme that above-mentioned technical problem adopted is a valve structure of dry powder fire extinguisher, including connecting the valve main part in the bottle top of fire extinguisher, the valve main part includes

The shell is internally provided with a first cavity, the side wall of the shell is provided with a jet orifice, and the jet orifice extends inwards to form a jet passage communicated with the first cavity;

the valve rod structure is arranged in the first cavity, penetrates through the shell and is used for opening and closing the jet orifice;

the valve handle is arranged above the shell, is connected with the valve rod structure and is used for opening the valve rod structure;

the valve handle comprises a lower handle rotationally connected with the shell and an upper handle rotationally connected with the shell and used for extruding the valve rod structure; the lower handle is rotatably connected with the shell through a connecting piece, and the lower handle rotates towards the lower side direction by taking the connecting piece as a center.

Preferably, the casing includes the installation department with the inner wall connection of the bottle of fire extinguisher, be provided with the third sealing washer on the installation department, be used for the reinforcing leakproofness between valve main part and this bottle prevents to take place the phenomenon of revealing during the use.

Preferably, the upper handle is rotatably connected to the housing by riveting.

By adopting the scheme, the valve main body is provided with the rotatable lower handle, so that the whole dry powder fire extinguisher has small occupied space after rotation, can be easily stored in the safety housing, not only reduces the occupied space, but also improves the safety performance of the dry powder fire extinguisher.

Further, the lower handle rotates downwards by 0-90 degrees by taking the connecting piece as a center.

Preferably, the connecting member may be a rivet, that is, the lower handle is connected to the housing by a riveting connection.

Preferably, the housing includes a limiting surface for limiting upward selection of the lower handle.

Furthermore, a safety pin for preventing the upper handle from rotating is arranged on the upper handle, and the other end of the safety pin is connected with the lower handle through a rubber chain.

Further, the valve rod structure comprises a valve rod cap arranged in the first cavity and used for controlling the on-off of the first cavity and the injection channel, and a valve rod arranged above the valve rod cap and penetrating through the shell and used for driving the valve rod cap; when the valve rod is extruded to move downwards, the valve rod cap is driven to move downwards, the first cavity is connected with the injection channel, and when the valve rod is not stressed, the edge of the valve rod cap is tightly attached to the inner wall of the first cavity to block the first cavity and the injection channel.

Preferably, the valve rod cap is detachably mounted at the lower end of the valve rod, so that subsequent maintenance is facilitated.

Preferably, the upper handle includes a pressing portion for pressing the valve stem, and the valve stem has a matching portion matching the pressing portion.

Furthermore, a vertical tube seat is connected to the position, below the valve rod cap, of the shell, a reset piece is connected to one end, close to the valve rod cap, of the vertical tube seat, and the other end of the reset piece is connected to the valve rod cap to provide an upward force for the valve rod cap.

Preferably, the valve stem cap is connected within the housing by a threaded connection.

Preferably, the return member comprises a compression spring.

Preferably, the inner wall of the vertical pipe seat is provided with a boss for mounting the resetting piece, and the other end of the resetting piece is sleeved on the valve rod cap.

Specifically, when the upper handle is rotated downward, the pressing portion applies a downward force to the valve stem, so that the valve stem moves downward and drives the valve stem cap to move downward, and the first cavity is communicated with the injection passage; when the upper handle is not stressed, the reset piece gives an upward reset force to the valve rod cap, the valve rod cap and the valve rod move upwards synchronously until the edge of the valve rod cap completely extrudes the inner wall of the shell, and therefore the first cavity and the injection channel are blocked.

Furthermore, the riser seat is provided with a second cavity communicated with the first cavity.

Preferably, the second cavity penetrates through the vertical pipe seat, so that the first cavity in the valve main body is communicated with the bottle body of the fire extinguisher.

Further, the valve rod cap is rotatably connected to the lower end of the valve rod through a flat gasket, and a first sealing element is arranged between the flat gasket and the valve rod cap.

Preferably, the upper end of the valve rod is provided with a second sealing ring.

By adopting the scheme, the arrangement of the first sealing element is used for enhancing the sealing property between the valve rod cap and the valve rod, so that gas at the lower end of the valve rod cap is prevented from entering the upper end of the valve rod cap, and the sealing strength is improved.

Furthermore, a nozzle piece is installed in the injection channel, and a channel communicated with the injection channel is formed in the nozzle piece and penetrates through the nozzle piece.

Further, an air inlet channel is arranged on the side wall of the shell below the jet orifice, and an air inlet device is installed on the air inlet channel.

Preferably, the air inlet passage communicates with the first chamber.

Preferably, the air inlet device comprises a valve core, the valve core is made of English, and when the valve is used, air is filled into the valve main body through the valve core.

Preferably, a safety device is further installed in the air inlet channel, the installation device comprises a safety spring seat, a safety valve seat and a release spring arranged between the safety spring seat and the safety valve seat, wherein a sealing flat gasket is installed at one end, far away from the safety spring seat, of the safety valve seat; and the safety spring seat with the safety valve seat be provided with the coaxial through-hole that sets up of inlet channel, when the internal gas pressure of fire extinguisher is great, gaseous can extrude sealed flat pad makes release spring atress compression, then gaseous can be in the same direction the safety spring seat with the through-hole of safety valve seat flows out to atmospheric pressure returns normally, simultaneously, release spring reconversion and drive the safety valve seat moves towards keeping away from the direction of safety spring seat, until sealed flat pad seals inlet channel prevents gas leakage.

Further, first cavity includes coaxial setting from top to bottom cavity first section, cavity second section and the cavity third section that internal diameter is crescent from top to bottom in proper order, wherein, the longitudinal section of cavity second section is the toper that the internal diameter is crescent from top to bottom.

Preferably, when the valve rod is not stressed, the valve rod cap is arranged in the second section of the cavity, and the resetting piece gives a force to the valve rod cap to enable the valve rod cap to move towards the direction close to the first section of the cavity, so that sealing is realized; when the valve rod is stressed, the valve rod drives the valve rod cap to move towards the direction close to the third section of the cavity, and as the longitudinal section of the second section of the cavity is a conical longitudinal section with gradually increasing inner diameter from top to bottom and is a cone with gradually increasing inner diameter from top to bottom, the valve rod cap moves downwards, so that the whole first cavity is communicated with the injection channel.

(III) advantageous effects

Compared with the prior art, the utility model designs a valve structure of dry powder fire extinguisher, the valve main body is provided with a rotatable lower handle, after rotating, the occupied space of the whole dry powder fire extinguisher is small, and the valve structure can be easily stored in a safety housing, thereby not only reducing the occupied space, but also improving the safety performance of the dry powder fire extinguisher; the valve mechanism operating mechanism is simple, convenient, flexible and quick.

Drawings

FIG. 1 is a sectional view showing a valve structure of a dry chemical extinguisher according to the present embodiment;

FIG. 2 is an enlarged view of the point A in FIG. 1;

fig. 3 is a transverse partial sectional view at B in fig. 1.

Description of reference numerals: 1. a valve body; 11. a housing; 111. a first cavity; 111-1, a first section of the cavity; 111-2, a second section of the cavity; 111-3, a third section of the cavity; 112. an injection channel; 113. a nozzle member; 113-1, a channel; 114. an air intake passage; 115. an installation part; 116. a third seal ring; 12. A valve stem structure; 121. a valve stem cap; 122. a valve stem; 122-1, a matching section; 122-2, a second sealing ring; 123. a riser base; 123-1 and a second cavity; 123-2 and a boss; 124. a reset member; 125. A flat gasket; 126. a first seal member; 13. a valve handle; 131. a lower handle; 132. an upper handle; 132-1, an extrusion part; 133. a connecting member; 14. a safety pin; 141. a rubber chain; 16. a valve core; 17. a safety device; 171. a safety spring seat; 172. a safety valve seat; 173. releasing the spring; 174. and sealing the flat gasket.

Detailed Description

The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In this embodiment:

as shown in fig. 1, the valve structure of a dry powder fire extinguisher of the present embodiment includes a valve body 1 connected above a bottle body of the fire extinguisher, the valve body 1 includes a housing 11, a first cavity 111 is arranged in the housing, a side wall of the housing is provided with an injection port, and the injection port extends inwards to form an injection passage 112 communicated with the first cavity 111; a valve rod structure 12 disposed in the first cavity 111 and penetrating through the housing 11, for opening and closing the injection port; a valve handle 13 disposed above the housing 11 and connected to the valve stem structure 12, for opening the valve stem structure 12; the valve handle 13 comprises a lower handle 131 rotatably connected to the housing 11 and an upper handle 132 rotatably connected to the housing 11 for pressing the valve stem structure 12; the lower handle 131 is rotatably connected to the housing 11 through a connecting member 133, and the lower handle 131 rotates in a downward direction around the connecting member 133. Preferably, the housing 11 includes a mounting portion 115 connected to an inner wall of a bottle body of the fire extinguisher, and a third sealing ring 116 is disposed on the mounting portion 115 to enhance the sealing property between the valve body 1 and the bottle body and prevent leakage during use. Preferably, the upper handle 132 is pivotally connected to the housing 11 by riveting. Further, the lower handle 131 is rotated downward by 0 to 90 degrees centering on the connecting member 133. Preferably, the connecting member 133 may be a rivet, that is, the lower handle 131 is connected to the housing 11 by riveting. Preferably, the housing 11 includes a restricting surface for restricting upward selection of the lower handle 131. Further, the upper handle 132 is provided with a safety pin 14 for preventing rotation thereof, and the other end of the safety pin 14 is connected to the lower handle 131 through a rubber chain 141. Further, a nozzle member 113 is installed in the injection passage 112, and a passage 113-1 communicating with the injection passage 112 is formed in the nozzle member 113 and penetrates through the nozzle member 113. By adopting the scheme, the valve main body 1 is provided with the rotatable lower handle 131, so that the occupied space of the whole dry powder fire extinguisher is small after the valve main body is rotated, the valve main body can be easily stored in the safety housing, the occupied space is reduced, and the safety performance of the dry powder fire extinguisher is also improved.

As shown in fig. 1-2, further, the valve stem structure 12 includes a valve stem cap 121 disposed in the first cavity 111 for controlling the opening and closing of the first cavity 111 and the injection channel 112, and a valve stem 122 disposed above the valve stem cap 121 and penetrating through the housing 11 for driving the valve stem cap 121; when the valve rod 122 is pressed to move downwards, the valve rod cap 121 is driven to move downwards, the first cavity 111 is connected with the injection channel 112, and when the valve rod 122 is not stressed, the edge of the valve rod cap 121 is tightly attached to the inner wall of the first cavity 111 to block the first cavity 111 and the injection channel 112. Preferably, the stem cap 121 is detachably mounted to the lower end of the stem 122 to facilitate subsequent maintenance. Preferably, the upper handle 132 includes a pressing portion 132-1 for pressing the valve stem 122, and correspondingly, the valve stem 122 has a matching portion 122-1 matching with the pressing portion 132-1. Further, a stem 123 is connected to the housing 11 below the valve stem cap 121, a reset member 124 is connected to one end of the stem 123 close to the valve stem cap 121, and the other end of the reset member 124 is connected to the valve stem cap 121 to apply an upward force to the valve stem cap 121. Further, the stem 123 is provided with a second cavity 123-1 communicated with the first cavity 111. Preferably, the second cavity 123-1 penetrates through the vertical tube seat 123, so that the first cavity 111 in the valve body 1 is communicated with the bottle body of the fire extinguisher. Preferably, the valve stem cap 121 is coupled within the housing 11 by a threaded connection. Preferably, the reset member 124 comprises a compression spring. Preferably, a boss 123-2 is disposed on an inner wall of the stem seat 123 for mounting the reset member 124, and the other end of the reset member 124 is sleeved on the valve stem cap 121. Specifically, when the upper handle 132 is rotated downward by hand, the pressing portion 132-1 applies a downward force to the valve stem 122, so that the valve stem 122 moves downward and drives the valve stem cap 121 to move downward, and the first chamber 111 communicates with the injection channel 112; when the upper handle 132 is not under stress, the reset part 124 applies an upward reset force to the valve rod cap 121, so that the valve rod cap 121 and the valve rod 122 move upward synchronously until the brim of the valve rod cap 121 presses the inner wall of the housing 11 completely, thereby blocking the first cavity 111 and the injection channel 112.

As shown in fig. 2, the valve stem cap 121 is rotatably connected to the lower end of the valve stem 122 by a flat gasket 125, and a first sealing member 126 is disposed between the flat gasket 125 and the valve stem cap 121. Preferably, the upper end of the valve stem 122 is provided with a second sealing ring 122-2. With the above scheme, the first sealing element 126 is arranged to enhance the sealing property between the valve stem cap 121 and the valve stem 122, so as to prevent gas at the lower end of the valve stem cap 121 from entering the upper end thereof, thereby improving the sealing strength.

As shown in fig. 1 and fig. 3, further, an intake passage 114 is provided on the side wall of the housing 11 below the injection port, and an intake device is mounted in the intake passage 114. Preferably, the air inlet passage 114 communicates with the first chamber 111. Preferably, the air inlet means comprises a valve core 16, the valve core 16 is made of english, and the valve core 16 is used for inflating the valve body 1. Preferably, a safety device 17 is further installed in the intake passage 114, the installation device includes a safety spring seat 171, a safety valve seat 172, and a release spring 173 arranged between the safety spring seat 171 and the safety valve seat 172, wherein a sealing flat gasket 174 is installed at one end of the safety valve seat 172 away from the safety spring seat 171; and the safety spring seat 171 and the safety valve seat 172 are provided with through holes coaxially arranged with the air inlet channel 114, when the air pressure in the fire extinguisher is large, the gas can extrude the sealing flat pad 174 to make the release spring 173 stressed and compressed, and then the gas can flow out along the through holes of the safety spring seat 171 and the safety valve seat 172, so that the air pressure returns to normal, and simultaneously, the release spring 173 recovers and drives the safety valve seat 172 to move towards the direction far away from the safety spring seat 171 until the sealing flat pad 174 seals the air inlet channel 114 to prevent air leakage.

As shown in fig. 2, further, the first cavity 111 includes a first cavity section 111-1, a second cavity section 111-2, and a third cavity section 111-3, which are coaxially arranged, and have gradually increasing inner diameters from top to bottom, where a longitudinal section of the second cavity section 111-2 is a cone with gradually increasing inner diameters from top to bottom. Preferably, when the valve stem 122 is not stressed, the valve stem cap 121 is placed in the second chamber section 111-2, and the reset member 124 applies a force to the valve stem cap 121 to move it toward the first chamber section 111-1, so as to achieve sealing; after the valve rod 122 is stressed, the valve rod 122 drives the valve rod cap 121 to move towards the direction close to the third section 111-3 of the cavity, and since the longitudinal section of the second section 111-2 of the cavity is a conical longitudinal section with gradually increasing inner diameter from top to bottom and is a cone with gradually increasing inner diameter from top to bottom, after the valve rod cap 121 moves downwards, the whole first cavity 111 is communicated and communicated with the injection channel 112.

The operation flow of this embodiment: the fire extinguisher is firstly taken out of the safety housing, the safety pin 14 is pulled out, then the lower handle 131 is held, the upper handle 132 is pressed down, the valve rod structure 12 is opened by pressing down the upper handle 132, and finally the compressed gas nitrogen in the bottle body blows the dry powder extinguishing agent ammonium phosphate dry powder extinguishing agent in the fire extinguisher to be sprayed out from the spray opening of the valve main body 1.

The technical requirements of the embodiment are as follows: 1. the operating mechanism of the valve main body 1 can flexibly open the valve, and the hand feeling is appropriate; 2. when the safety pin 14 is not pulled out, the minimum clearance between the upper handle 132 and the top end of the valve rod 122 is not less than 1 mm; 3. the valve main body 1 needs to be subjected to an air tightness test with the test pressure of 2.1MPa, and the pressure is maintained for 3min without any leakage; 4. the valve main body 1 needs to be subjected to a hydrostatic strength test with the test pressure of 3.0MPa, and any leakage and visible deformation cannot occur in the test; 5. during the assembly and test process, attention is paid to protect the valve body 1, and the appearance and the threads of the valve body 1 cannot be knocked and damaged.

The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a valve structure of dry powder fire extinguisher, is including connecting the valve main part in the bottle top of fire extinguisher, its characterized in that: the valve body (1) comprises

The device comprises a shell (11), a first cavity (111) is arranged in the shell, an injection port is arranged on the side wall of the shell, and the injection port extends inwards to form an injection passage (112) communicated with the first cavity (111);

the valve rod structure (12) is arranged in the first cavity (111) and penetrates through the shell (11) and is used for opening and closing the jet orifice;

the valve handle (13) is arranged above the shell (11), is connected with the valve rod structure (12) and is used for opening the valve rod structure (12);

the valve handle (13) comprises a lower handle (131) rotatably connected with the housing (11) and an upper handle (132) rotatably connected with the housing (11) and used for squeezing the valve rod structure (12); wherein, the lower handle (131) is rotatably connected with the housing (11) through a connecting piece (133), and the lower handle (131) rotates towards the lower side direction by taking the connecting piece (133) as the center.

2. The valve structure of a dry chemical extinguisher according to claim 1, wherein: the lower handle (131) rotates downwards by 0-90 degrees by taking the connecting piece (133) as a center.

3. The valve structure of a dry chemical extinguisher according to claim 1, wherein: the upper handle (132) is provided with a safety pin (14) for preventing the rotation of the upper handle, and the other end of the safety pin (14) is connected with the lower handle (131) through a rubber chain (141).

4. The valve structure of a dry chemical extinguisher according to claim 1, wherein: the valve rod structure (12) comprises a valve rod cap (121) arranged in the first cavity (111) and used for controlling the first cavity (111) and the injection channel (112) to be switched on and off, and a valve rod (122) arranged above the valve rod cap (121) and penetrating through the shell (11) and used for driving the valve rod cap (121); when the valve rod (122) is extruded to move downwards, the valve rod cap (121) is driven to move downwards, the first cavity (111) is connected with the injection channel (112), and when the valve rod (122) is not stressed, the edge of the valve rod cap (121) is tightly attached to the inner wall of the first cavity (111) to block the first cavity (111) and the injection channel (112).

5. The valve structure of a dry chemical extinguisher according to claim 4, wherein: the shell (11) is located below the valve rod cap (121) and is connected with a vertical tube seat (123), one end, close to the valve rod cap (121), of the vertical tube seat (123) is connected with a resetting piece (124), and the other end of the resetting piece (124) is connected to the valve rod cap (121) to provide upward force for the valve rod cap (121) from beginning to end.

6. The valve structure of a dry chemical extinguisher according to claim 5, wherein: the riser seat (123) is provided with a second cavity (123-1) communicated with the first cavity (111).

7. The valve structure of a dry chemical extinguisher according to claim 4, wherein: the valve rod cap (121) is rotatably connected to the lower end of the valve rod (122) through a flat gasket (125), and a first sealing element (126) is arranged between the flat gasket (125) and the valve rod cap (121).

8. The valve structure of a dry chemical extinguisher according to claim 1, wherein: a nozzle piece (113) is installed in the injection channel (112), and a channel (113-1) communicated with the injection channel (112) is formed in the nozzle piece (113) and penetrates through the nozzle piece (113).

9. The valve structure of a dry chemical extinguisher according to claim 1, wherein: an air inlet channel (114) is arranged on the side wall of the shell (11) and below the jet opening, and an air inlet device is installed in the air inlet channel (114).

10. The valve structure of a dry chemical fire extinguisher according to any one of claims 1 to 9, wherein: the first cavity (111) comprises a first cavity section (111-1), a second cavity section (111-2) and a third cavity section (111-3) which are coaxially arranged, wherein the inner diameters of the first cavity section (111-1), the second cavity section (111-2) and the third cavity section (111-3) are gradually increased from top to bottom, and the longitudinal section of the second cavity section (111-2) is a cone with the gradually increased inner diameter from top to bottom.