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CN103616119B - The fire extinguisher of pressure monitoring device and this pressure monitoring device of employing - Google Patents

The fire extinguisher of pressure monitoring device and this pressure monitoring device of employing Download PDF

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Publication number
CN103616119B
CN103616119B CN201310632365.1A CN201310632365A CN103616119B CN 103616119 B CN103616119 B CN 103616119B CN 201310632365 A CN201310632365 A CN 201310632365A CN 103616119 B CN103616119 B CN 103616119B
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China
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fixed
microswitch
pressure monitoring
joint
push rod
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CN103616119A (en
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赵春颜
李清涛
孙慧婕
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Beijing Beiji Mechanical and Electrical Industry Co Ltd
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Beijing Beiji Mechanical and Electrical Industry Co Ltd
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Abstract

The invention provides a kind of pressure monitoring device and adopt the fire extinguisher of this pressure monitoring device, connection housing including the joint and built-in pressure monitoring switch that are provided with air inlet through hole, joint is connected with inside extinguishment fire suppression gas storage equipment, is connected housing with joint in being tightly connected, and pressure monitoring device is connected with alarm device. This pressure monitoring device good seal performance, security performance are high, it is reliable to connect, solve the drawback that extinguishment fire suppression gas storage equipment internal gas pressure value should not be monitored, by pressure monitoring device, the internal gas pressure value of extinguishment fire suppression gas storage equipment is monitored, reported to the police by alarm device when extinguishment fire suppression gas storage equipment air pressure is too small, avoid, owing to extinguishment fire suppression gas storage equipment not easily makes people discover owing to the reasons such as leakage cause that internal pressure reduces, cannot using thus resulting in greater loss when needs are put out a fire.

Description

The fire extinguisher of pressure monitoring device and this pressure monitoring device of employing
Technical field
The invention belongs to fire control technology field, particularly to a kind of pressure monitoring device and the fire extinguisher adopting this pressure monitoring device.
Background technology
Fire-fighting fire-extinguishing equipment in the market is mostly built-in high pressure tank, generally utilizes huge pressure differential that extinguishing chemical ejects to reach the purpose of fire extinguishing from fire-fighting fire-extinguishing equipment in extinguishing operation. But when, after fire-fighting fire-extinguishing equipment idle a period of time, the gases at high pressure of storage inside may make air pressure not enough due to reasons such as leakages, uses the fire-extinguishing apparatus that air pressure is not enough often to have a strong impact on the process of fire extinguishing when needing to put out a fire, ultimately causes bigger loss; Even if being provided with piezometer etc. to show the equipment of current fire-fighting fire-extinguishing equipment atmospheric pressure value, often also in time the fire-fighting fire-extinguishing equipment that air pressure is not enough cannot be made alarm, the fire-fighting fire-extinguishing equipment that air pressure is not enough is replaced by prompting people, to ensure that fire-extinguishing apparatus is in normal condition.
Summary of the invention
For solving defect of the prior art, the present invention provides a kind of pressure monitoring device and adopts the fire extinguisher of this pressure monitoring device, the built-in microswitch of this pressure monitoring device, can the fire-fighting fire-extinguishing equipment that air pressure is not enough be made alarm by the very first time effectively, prompting people need the fire-fighting fire-extinguishing equipment to air pressure is not enough to be replaced, and have reached fire-fighting fire-extinguishing equipment is used the monitoring of state.
Technical scheme:
A kind of pressure monitoring device, including joint, pressure monitoring switchs, connect housing and alarm device, described joint is fixed on one end of described connection housing, described joint and described connection housing is made to form an accommodation space, described pressure monitoring switch is positioned at described accommodation space and is connected with described alarm device, described joint is axially arranged with through air inlet through hole for connecting described accommodation space and pressure vessel inner chamber to be monitored along it, described pressure monitoring switch includes the diaphragm being coaxially disposed with described air inlet through hole, axially displaceable push rod and the microswitch being fixed on described connection housing, described diaphragm is fixed on the inner face of described joint to seal the inner opening covering described air inlet through hole, one end of described push rod is fixing with described diaphragm to be connected, under the promotion of described diaphragm described push rod the other end trigger microswitch start make described alarm device be in standby in, when push rod leaves under the pulling of described diaphragm and cannot continue to trigger microswitch startup, described alarm device starts to report to the police.
Described pressure monitoring switch also includes annular fixed station and groups of springs, described annular fixed station is fixed on the inside of described connection housing, it is provided with the through hole suitable with described push rod in described annular fixed station, the lower end edge lateral wall of the close described diaphragm of described push rod is provided with spring chuck, and described groups of springs is enclosed within described push rod between described spring chuck and annular fixed station lower surface.
Described microswitch includes fixed pedestal, fixed block, microswitch body and feeler lever, described microswitch is positioned at above described annular fixed station, described fixed pedestal is fixed on the inside connecting housing, and described fixed pedestal is provided with the through hole suitable with described microswitch body vertically, described fixed block is fixed on the upper surface of described fixed pedestal and tangent with the upper shed limit of described through hole, described microswitch body inserts the through hole of described fixed pedestal and fixing with fixed block is connected, the lower end of described microswitch body is fixed with described feeler lever, described push rod top contacts through the through hole of described annular fixed station with described feeler lever, the upper end of described microswitch body is signal output part, described signal output part is connected with described alarm device by wire.
Described diaphragm is stainless steel, and its thickness is 0.05mm.
Described groups of springs includes 3-6 group saucer washer formula spring, and the thickness often organizing described spring is 2mm-4mm.
Described connection housing includes connector and rear cover body, described connector and described rear cover body are the tubular construction of both ends open, the open top end lateral wall of described connector is provided with external screw thread, the bottom open end medial wall of described rear cover body is provided with female thread, in order to be fixed on bottom described rear cover body by described connector top; It is provided with the connector through hole being mutually communicated along axis inside described connector; Described connector bottom open end is inwardly formed the first cavity, and its open top end is inwardly formed the second cavity; Described nipple tip radially protrudes formation one annular boss, described first cavity is suitable with described joint annular boss, in order to by nested for described joint annular boss extremely described first cavity, the top of described joint is provided with Gask-O-Seal, and the described joint annular boss position corresponding with described first cavity inner bottom surface is provided with the annular groove suitable with described Gask-O-Seal; The described connector bottom open end position corresponding with described joint annular boss is provided with fixing chuck, is fixed in described first cavity in order to be sealed by described joint annular boss; Described first cavity inner bottom surface is centrally along being axially formed a concave station; Described fixed pedestal is arranged in the open top end of described rear cover body, described fixed pedestal is cylindrical structure and lateral wall is provided with the external screw thread corresponding with described rear cover body bottom open end medial wall female thread, in order to be fixed in rear cover body bottom open end by the mode of screw-threaded engagement; Described annular fixed station is fixedly installed on the position that described rear cover body bottom open end medial wall is corresponding with described push rod top.
What the open top end medial wall of described rear cover body was corresponding with the top of described microswitch body is provided with fixing plate, described fixing plate is close on the top end surface of described microswitch body, described fixing plate is provided with wire guide, derives in order to the described wire connected on microswitch body top.
Described rear cover body open top end inner face is cast with epoxy resin layer between described fixing plate, being provided with lead channels in described epoxy resin layer, in order to be derived by described wire, described rear cover body open top end is provided with cover plate along end face, described cover plate is provided with lead channels, in order to be derived by wire.
Described connection housing, described joint, described push rod, described fixed pedestal or employing carbon constructional quality steel material.
A kind of fire extinguisher, including the pressure vessel described to be monitored of internal high-voltage gas, described pressure vessel to be monitored is provided with and the internal thread interface being connected bottom described joint, also includes above-mentioned a kind of pressure monitoring device, described gases at high pressure are nitrogen, and described pressure vessel to be monitored is pressure bottle.
Technique effect:
The invention provides a kind of pressure monitoring device and adopt the fire extinguisher of this pressure monitoring device, compared to the prior art, the present invention has following beneficial effect:
A kind of pressure monitoring device, including joint, pressure monitoring switch, connect housing and alarm device, joint is fixed on the one end connecting housing, make joint and connect housing formation one accommodation space, pressure monitoring switch is positioned at accommodation space being connected with alarm device, and make alarm device be able to receive that signal that pressure monitoring switchs also processes.Joint is axially arranged with through air inlet through hole along it and holds space and pressure vessel inner chamber to be monitored for connecting connection enclosure interior, pressure monitoring switch includes the diaphragm being coaxially disposed with air inlet through hole, axially displaceable push rod and the microswitch being fixed on connection housing, diaphragm is fixed on the inner face of joint to seal the inner opening covering air inlet through hole, one end of push rod is fixing with diaphragm to be connected, the other end of push rod contacts with microswitch, when diaphragm is subject in pressure vessel to be monitored the normal pressure transmitted, diaphragm itself expands deformation towards pressure direction, produce displacement and form the thrust to push rod, when push rod is moved to operating position in the promotion of diaphragm, push rod triggers microswitch and starts, now alarm device receives microswitch startup is normal Standby state, when pressure vessel internal gas pressure to be monitored weakens, the state of the original elastic deformation of diaphragm is gradually along with the beginning that weakens of pressure vessel internal gas pressure to be monitored bounces back reset gradually, now push rod is subject to the pulling force of diaphragm and is left operating position, cause push rod cannot continue to trigger the startup of microswitch and make alarm device by the signal intensity of microswitch sends alarm, prompting hypotony within people's pressure vessel to be monitored, need to treat monitoring pressure container internal pressure to be monitored guaranteeing the duty that pressure vessel to be monitored is in normal table.
Pressure monitoring switch also includes annular fixed station and groups of springs, annular fixed station is fixed on the inside connecting housing, it is provided with the through hole suitable with push rod in annular fixed station, the lower end edge lateral wall of the close diaphragm of push rod is provided with spring chuck, groups of springs is enclosed within push rod between spring chuck and annular fixed station lower surface, reduce push rod because diaphragm produce displacement excessive so that the parts pressurized of microswitch is excessive suffer damage while when because of reasons such as leakages, fire extinguisher pressure bottle causes that pressure of the inside of a bottle reduces, diaphragm pressure experienced weakens, even if disconnecting of push rod and diaphragm, also feeler lever can be promoted to head on diaphragm by the elastic thrust of spring to continue to do retraction reseting movement, effect is more stable and accurate.
Microswitch includes fixed pedestal, fixed block, microswitch body and feeler lever, microswitch is positioned at above annular fixed station, fixed pedestal is fixed on the inside connecting housing, and fixed pedestal is provided with the through hole suitable with microswitch body vertically, fixed block is fixed on the upper surface of fixed pedestal and tangent with the upper shed limit of through hole, microswitch body is made to be inserted the through hole of fixed pedestal and fixing with fixed block be connected, the lower end of microswitch body is fixed with the feeler lever feeler lever starting microswitch, push rod top contacts through the through hole of annular fixed station with feeler lever, diaphragm is made to form one with push rod and feeler lever, the upper end of microswitch body is signal output part, signal output part is connected with alarm device by wire, feeler lever is made to start or not start microswitch by the elastic deformation after diaphragm pressurized, signal microswitch being started change passes to alarm device, the signal intensity of microswitch is carried out standby or reports to the police by alarm device.
Preferably, diaphragm is stainless steel, has higher stability, and corrosion-resistant, its thickness is preferably 0.05mm.
Preferably, groups of springs includes 3-6 group saucer washer formula spring, and saucer washer formula spring rate is big, and buffering vibration absorption ability is strong, can bear big load with small deformation, be suitable for the occasion that axial space requirement is little, and the thickness of spring is preferably 2mm-4mm.
Connect housing and include connector and rear cover body, connector and rear cover body are the tubular construction of both ends open, the open top end lateral wall of connector is provided with external screw thread, and the bottom open end medial wall of rear cover body is provided with female thread, in order to be fixed on bottom rear cover body by connector top; It is provided with the connector through hole being mutually communicated along axis inside connector; Connector bottom open end is inwardly formed the first cavity, and its open top end is inwardly formed the second cavity; Nipple tip radially protrudes formation one annular boss, first cavity is suitable with joint annular boss, in order to by joint annular boss nesting to the first cavity, the top of joint is provided with the corresponding position of Gask-O-Seal, joint annular boss and the first cavity inner bottom surface and is provided with the annular groove suitable with Gask-O-Seal in order to be embedded in annular groove by Gask-O-Seal; The connector bottom open end position corresponding with joint annular boss is provided with fixing chuck, is fixed in the first cavity in order to be sealed by joint annular boss, forms fixing effect; First cavity inner bottom surface is centrally along being axially formed a concave station, and the structure of concave station can provide the enough spaces needed during diaphragm generation elastic deformation; Fixed pedestal is arranged in the open top end of rear cover body, fixed pedestal is cylindrical structure and lateral wall is provided with the external screw thread corresponding with rear cover body bottom open end medial wall female thread, in order to be fixed in rear cover body bottom open end by the mode of screw-threaded engagement; Annular fixed station is fixedly installed on the position that rear cover body bottom open end medial wall is corresponding with push rod top, in order to make the moving direction of push rod not deviate by.
What the open top end medial wall of rear cover body was corresponding with the top of microswitch body is provided with fixing plate; fixing plate is close on the top end surface of microswitch body; fixing plate is provided with wire guide; wire in order to be connected on microswitch body top is derived; rear cover body is made to be internally formed closing space, protection parts within rear cover body.
Rear cover body open top end inner face is cast with epoxy resin layer between fixing plate, epoxy resin layer is provided with lead channels, in order to wire is derived, rear cover body open top end is provided with cover plate along end face, cover plate is provided with lead channels, in order to be derived by wire, epoxy resin layer can reduce dust and enter, and makes the parts such as microswitch avoid the impact being subject to dust to produce the loose contact rocking generation of abrasion or wire.
Connect housing, joint, push rod, fixed pedestal and (or) adopt carbon constructional quality steel material. The strength of materials of carbon constructional quality steel material is high, and good stability, cost are low.
A kind of fire extinguisher, including the pressure vessel to be monitored of internal high-voltage gas, pressure vessel to be monitored is provided with and the internal thread interface being connected bottom joint, also includes above-mentioned a kind of pressure monitoring device, and gases at high pressure are nitrogen, and nitrogen is noble gas, not combustion-supporting. Pressure vessel to be monitored is preferably pressure bottle.
Accompanying drawing explanation
Fig. 1 is the structural representation of fire extinguishing jet device in the present invention;
In figure, each label example is as follows:
1-joint, 10-air inlet through hole, 11-joint annular boss, 12-Gask-O-Seal, 2-connector, 21-the first cavity, 22-concave station, 23-fixes chuck, 24-the second cavity, 25-connector through hole, 3-rear cover body, 31-annular fixed station, 32-fixes plate, 33-cover plate, 4-pressure monitoring device, 40-pressure monitoring switchs, 41-push rod, 42-microswitch, 421-microswitch body, 422-feeler lever, 43-fixed pedestal, 431-fixed block, 44-groups of springs, 45-wire, 46-epoxy resin layer, 5-diaphragm, 6-alarm device.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated. Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention.
The invention discloses a kind of pressure monitoring device and adopt the fire extinguisher of this pressure monitoring device, Fig. 1 is the structural representation of pressure monitoring device 4 in the present invention, as shown in Figure 1: fire extinguisher (does not mark) pressure vessel to be monitored (not marking) including internal high-voltage gas, in the present embodiment, preferred pressure vessel to be monitored is fire extinguisher pressure bottle (not marking), due to the noble gas that nitrogen is not combustion-supporting, the gases at high pressure that fire extinguisher pressure bottle that therefore nitrogen is preferably in the present embodiment is built-in.
Further, the sidewall of fire extinguisher pressure bottle is provided with the internal thread interface (not marking) being connected with pressure monitoring device 4, specifically, pressure monitoring device 4 includes joint 1, pressure monitoring switch 40 and connects housing and alarm device 6, joint 1 is fixed on the one end connecting housing, make joint 1 and connect one accommodation space of housing formation, pressure monitoring switch 40 is fixed in above-mentioned accommodation space and is connected with alarm device 6 by wire 45, makes alarm device 6 be able to receive that the signal of pressure monitoring switch 40 and process. joint 1 bottom outside wall is provided with external screw thread, it is threaded connection the internal thread interface with fire extinguisher pressure bottle to be connected, joint 1 is axially arranged with through air inlet through hole 10 along it, for connecting the inner chamber holding space and fire extinguisher pressure bottle connecting enclosure interior, and monitor the gas storage atmospheric pressure value in pressure bottle. pressure monitoring switchs 40 diaphragm 5, the axially displaceable push rods 41 including being coaxially disposed with air inlet through hole 10 and is fixed on the microswitch 42 being connected on housing, diaphragm 5 is fixed on the inner face of joint 1 to seal the inner opening covering air inlet through hole 10. one end of push rod 41 is fixing with diaphragm 5 to be connected, the preferred push rod of the present embodiment 41 is connected with adopting gluing fixing of diaphragm 5, the other end of push rod 41 contacts with microswitch 42, when diaphragm 5 is subject in fire extinguisher pressure bottle the normal pressure transmitted, diaphragm 5 itself expands deformation towards pressure direction, produce displacement and form the thrust to push rod 41, when push rod 41 is moved to operating position in the promotion of diaphragm 5, push rod 41 triggers microswitch 42 and starts, now alarm device 6 receives microswitch 42 startup is normal Standby state, when fire extinguisher pressure bottle internal gas pressure weakens, the state of the original elastic deformation of diaphragm 5 is gradually along with the beginning that weakens of fire extinguisher pressure bottle internal gas pressure bounces back reset gradually, now push rod 41 is subject to the pulling force of diaphragm 5 and is left operating position, cause push rod 41 cannot continue to trigger the startup of microswitch 42 and make alarm device 6 by the signal intensity of microswitch 42 sends alarm, prompting hypotony within people's fire extinguisher pressure bottle, need to be monitored guaranteeing the duty that fire extinguisher pressure bottle is in normal table to fire extinguisher pressure bottle internal pressure.
Concrete, formation one annular boss is radially protruded on joint 1 top; Connect housing and include connector 2 and rear cover body 3, connector 2 and rear cover body 3 are the tubular construction of both ends open, the open top end lateral wall of connector 2 is provided with external screw thread, and the bottom open end medial wall of rear cover body 3 is provided with female thread, in order to be fixed on bottom rear cover body 3 by connector 2 top;Connector 2 is internal is provided with the connector through hole 25 being mutually communicated along axis; Connector 2 bottom open end is inwardly formed the first cavity 21, and its open top end is inwardly formed the second cavity 24; First cavity 21 is suitable with joint annular boss 11, in order to by joint annular boss 11 nesting to the first cavity 21, it is provided with Gask-O-Seal 12 between joint annular boss 11 and the first cavity 21 inner bottom surface, joint annular boss 11 position corresponding with the first cavity 21 inner bottom surface is provided with the annular groove suitable with Gask-O-Seal 12, in order to be embedded in annular groove by Gask-O-Seal 12; The connector 2 bottom open end position corresponding with joint annular boss 11 is provided with fixing chuck 23, described fixing chuck 23 one end is fixed on described connector 2 bottom open end end face, the other end extends to the position that described joint annular boss 11 is corresponding, in order to joint annular boss 11 is stuck in the first cavity 21, form fixing effect, make joint and the first cavity 21 form one by Gask-O-Seal 12 and seal structure; First cavity 21 inner bottom surface forms a concave station 22 centrally along axial recess, connector through hole 25 will be provided with diaphragm 5 between through for concave station 22 Gask-O-Seal 12 and the first cavity 21 inner bottom surface, makes diaphragm 5 can be firmly secured on the inner face of joint 1 to seal the inner opening covering air inlet through hole 10; When diaphragm 5 is subject in fire extinguisher pressure bottle the pressure transmitted, diaphragm 5 itself, towards pressure direction generation elastic deformation, forms displacement, and the structure of concave station 22 can provide diaphragm 5 that the enough spaces needed during elastic deformation occur.
Further, pressure monitoring switch 40 is fixed in connector 2, including annular fixed station 31 and groups of springs 44, annular fixed station 31 is arranged on the position that rear cover body 3 bottom open end medial wall is corresponding with push rod 41 rear end, the lateral wall of annular fixed station 31 is provided with and is provided with the external screw thread suitable with rear cover body 3 bottom open end female thread, in order to be fixed on rear cover body 3 bottom open end medial wall, the lower end edge lateral wall of the close diaphragm 5 of push rod 41 is provided with spring chuck, groups of springs 44 is enclosed within push rod 41 between spring chuck and annular fixed station 31 lower surface, in order to reduce push rod 41 because diaphragm 5 produce displacement excessive so that the parts pressurized of microswitch 42 is excessive suffer damage while when because of reasons such as leakages, fire extinguisher pressure bottle causes that pressure of the inside of a bottle reduces, diaphragm 5 pressure experienced weakens, even if disconnecting of push rod 41 and diaphragm 5, also feeler lever 41 can be promoted to head on diaphragm 5 by the elastic thrust of groups of springs 44 to continue to do retraction reseting movement, effect is more stable and accurate.
The through hole suitable with push rod 41 is set in annular fixed station 31, push rod 41 top is connected through the through hole of annular fixed station 31 with feeler lever 422, the bottom of push rod 41 is connected through connector through hole 25 with diaphragm 5, when diaphragm 5 is subject in fire extinguisher pressure bottle the pressure transmitted, diaphragm 5 itself expands deformation towards pressure direction, form displacement, when the air pressure of fire extinguisher pressure bottle is too small, also retraction deformation can be there is towards the opposite direction of pressure in diaphragm 5 itself, it is similarly formed displacement, when being therefore subjected to displacement, the feeler lever 422 being connected with diaphragm 5 is also subjected to displacement thus opening microswitch 42 simultaneously, signal is transferred to alarm device 6 from the signal output part on microswitch 42 top by wire 45, alarm device 6 is made to send alarm.The bottom of push rod 41 is provided with spring chuck along lateral wall, groups of springs 44 is enclosed within the lateral wall of push rod 41, the top traverse annular fixed station 31 of push rod 41, the bottom of such groups of springs 44 withstands in spring chuck, its top withstands on annular fixed station 31, displacement is excessive so that the parts pressurized of microswitch 42 is excessive suffers damage because diaphragm 5 produces to reduce push rod 41, simultaneously when because of reasons such as leakages, fire extinguisher pressure bottle causes that pressure of the inside of a bottle reduces, diaphragm 5 pressure experienced weakens, starting to make retraction reseting movement push rod 41 can under the effect of disk spring, even if the connection of push rod 41 and diaphragm 5 disconnects, also the elastic thrust that can pass through spring promotes feeler lever 422 to head on diaphragm 5 work retraction reseting movement, effect is more stable and accurate.
Further, groups of springs 44 includes 3-6 group saucer washer formula spring, saucer washer formula spring rate is big, and buffering vibration absorption ability is strong, can bear big load with small deformation, it is suitable for the occasion that axial space requirement is little, the thickness of spring is 2mm-4mm, and in the present embodiment, preferred groups of springs 44 includes 6 groups of saucer washer formula springs, and the thickness often organizing saucer washer formula spring is 4mm, the elastic force often organizing saucer washer formula spring is 500N-700N, and the present embodiment excellent often group saucer washer formula spring force is 504N.
Microswitch 42 is positioned at above annular fixed station 31, microswitch 42 includes fixed pedestal 43, fixed block 431, microswitch body 421 and feeler lever 422, concrete, fixed pedestal 43 is arranged on inside the open top end of rear cover body 3, fixed pedestal 43 is cylindrical structure and sidewall is provided with the external screw thread corresponding with rear cover body 3 bottom open end medial wall female thread, and be fixed in rear cover body 3 bottom open end by the mode of screw-threaded engagement, fixed pedestal 43 is provided with the through hole corresponding with microswitch vertically; Microswitch body 421 is round bar shape structure, and its bottom is fixed with the feeler lever 422 that can start microswitch 42; Fixed block 431 is fixed on the upper surface of fixed pedestal 43 and tangent with the upper shed limit of the through hole of fixed pedestal 43, microswitch body 421 is made to be inserted the through hole of fixed pedestal 43 and fixing with fixed block 431 be connected, push rod 41 top contacts through the through hole of annular fixed station 31 with feeler lever 422, makes diaphragm 5 form one with push rod and feeler lever 422. The upper end of microswitch body 421 is signal output part, signal output part is connected with alarm device 6 by wire 45, make feeler lever 422 start by the elastic deformation after diaphragm 5 pressurized or do not start microswitch 42, signal microswitch 42 being started change passes to alarm device 6, and the signal intensity of microswitch 42 is carried out standby or reports to the police by alarm device 6.
Further; what the open top end medial wall of rear cover body 3 was corresponding with the top of microswitch body 421 is provided with fixing plate 32; fixing plate 32 is close on the top end surface of microswitch body 421; fixing plate 32 is provided with wire 45 hole; in order to the wire 45 that microswitch body 421 top connects is derived; rear cover body 3 is made to be internally formed closing space, protection parts within rear cover body 3.
Further, rear cover body 3 open top end inner face is cast with epoxy resin layer 46 between fixing plate 32, epoxy resin the surface of metal and nonmetallic materials is had excellence adhesive strength epoxy resin layer 46 in be provided with wire 45 passage, in order to wire 45 is derived, rear cover body 3 open top end is provided with cover plate 33 along end face, cover plate 33 is provided with wire 45 passage, in order to wire 45 is derived, epoxy resin layer 46 can reduce dust and enter, and make microswitch 42 avoid being subject to abrasion that dust produces or wire 45 rock the loose contact of generation.
Preferably, diaphragm 5 is stainless steel, and stainless diaphragm 5 has higher stability, corrosion-resistant, good toughness, and the thickness of the preferred diaphragm 5 of the present embodiment is 0.05mm.
Connection housing, joint 1, push rod 41, fixed pedestal 43 are metal structure, in the present embodiment, connection housing, joint 1, push rod 41, fixed pedestal 43 are both preferably carbon constructional quality steel material, the strength of materials of carbon constructional quality steel material is high, and good stability, cost are low.
Concrete mounting means, first by Gask-O-Seal 12 nesting to the annular groove bottom joint 1, by in the first cavity 21 of joint annular boss 11 nesting to connector 2, again with diel by fixing chuck 23 Pressing Deformation, make the one end fixing chuck 23 tightly block and be attached to the upper of joint ring shape boss 11, joint annular boss 11 is made to compress Gask-O-Seal 12 and diaphragm 5, diaphragm 5 is made to be fixed on the inner face of joint 1 to seal the inner opening covering air inlet through hole 10, joint 1 is connected by the internal thread interface of the connected mode of screw-threaded engagement with fire extinguisher pressure bottle, being tightly connected between joint 1 and fire extinguisher pressure bottle can be formed. Gask-O-Seal 12, under the extruding of joint annular boss 11, serves good sealing effectiveness, and meanwhile, the position of diaphragm 5 is fixed effect by the extruding of Gask-O-Seal. the bottom of push rod 41 is connected through connector through hole 25 with diaphragm 5, and therefore push rod 41 also and then carries out displacement movement also with the elastic displacement of diaphragm 5. being enclosed within the lateral wall of push rod 41 by groups of springs 44, first by the top of push rod 41 through annular fixed station 31, the bottom of such groups of springs 44 withstands in spring chuck, and top withstands on annular fixed station 31, makes groups of springs 44 form the thrust to push rod 41. and then, microswitch 42 is inserted the through hole of fixed pedestal 43 and is fixed on fixed block 431, the signal output part of microswitch 42 is connected with wire 45, then the mode that fixed pedestal 43 is threaded connection is embedded in rear cover body 3 opening, again annular fixed station 31 is also embedded in rear cover body 3 opening according to mode threaded equally, now the top of push rod 41 is touched through the feeler lever 422 with microswitch body 421 bottom from the through hole of annular fixed station 31, rear cover body 3 bottom open end is fixed on connector 2 open top end to form connection housing by the mode that is at this moment threaded connection, connection housing is made to reach sealing state by being cast with epoxy resin layer 46 between rear cover body 3 open top end inner face to fixing plate 32, protection parts such as microswitch 42 etc. within rear cover body 3 avoids the impact being subject to dust to produce the loose contact rocking generation of abrasion or wire 45.
Further, start to load gas and extinguishing chemical to fire extinguisher pressure bottle, the high pressure that gas in bottle produces directly acts on diaphragm 5 by joint inlet channel 10, the pressure of gases at high pressure makes diaphragm 5 produce elastic displacement along pressure direction, the top of push rod 41 has promoted the feeler lever 422 that the other end with push rod 41 is connected to carry out displacement movement too, the displacement movement top of feeler lever 422 is pressed and connects the switch of microswitch 42, the alarm device 6 being connected with microswitch 42 now by wire 45 have received the connection signal of microswitch 42, now alarm device 6 normal Standby, when because of reasons such as leakages, fire extinguisher pressure bottle causes that pressure of the inside of a bottle reduces, push rod 41 is under the effect of disk spring, diaphragm 5 and feeler lever 422 is promoted to make retraction reseting movement, when force value reaches to preset break-make force value, feeler lever 422 is due to the retraction reverse displacement of reseting movement, the connection signal finally making microswitch 42 disconnects, now alarm device 6 loses the connection signal of microswitch 42 and starts to report to the police, hypotony in prompting fire extinguisher pressure bottle, need to overhaul to guarantee the duty that fire extinguisher pressure bottle is in normal table to fire extinguisher pressure bottle.
Further, in order to better the internal pressure of fire extinguisher pressure bottle is monitored, the junction, lateral wall of connector 2 and rear cover body 3 can marking high scale value, owing to microswitch 42 is to be fixed in rear cover body 3 in the axial direction, the diaphragm 5 being under pressure promotes push rod 41 to be also carry out displacement vertically, therefore the rotation of screw thread is connected by connector 2 and rear cover body 3, making the feeler lever 422 of microswitch 42 change with the distance of push rod 41, the alarm pressure value for alarm device 6 is adjusted. specifically such as, first connector 2 and rear cover body 3 are separated, now, push rod 41 and microswitch 42 are released states, alarm device 6 is separated with wire 45, wire 45 is connected with circuit tester (not marking), then in fire extinguisher pressure bottle, it is filled with the nitrogen of 8MP, now rotate the lateral wall of rear cover body 3, rear cover body 3 threadingly direction is made to be connected with connector 2, now turn to till circuit tester receives diaphragm 5 promote push rod 41 to trigger enabling signal that microswitch 42 transmits and demonstrate reading always, illustrate that the alarm pressure value of pressure monitoring device 40 this moment is at 8MP, now can the relative scale position of current pressure values in marking in the junction, lateral wall of connector 2 and rear cover body 3, and Pressure gauge is changed to alarm device 6 is connected with wire 45. then carry out the gas filling such as 10MP-3MP according to said method, draw the warning graduation position of above-mentioned force value, and marking is in the junction, lateral wall of connector 2 and rear cover body 3. therefore only need to rotate the lateral wall of rear cover body 3 and targetedly the fire extinguisher pressure bottle needing monitoring is selected the corresponding alarming value of alarm device 6, simple and convenient effectively.

Claims (8)

1. a pressure monitoring device, it is characterized in that: include joint, pressure monitoring switchs, connect housing and alarm device, described joint is fixed on one end of described connection housing, described joint and described connection housing is made to form an accommodation space, described pressure monitoring switch is positioned at described accommodation space and is connected with described alarm device, described joint is axially arranged with through air inlet through hole for connecting described accommodation space and pressure vessel inner chamber to be monitored along it, described pressure monitoring switch includes the diaphragm being coaxially disposed with described air inlet through hole, axially displaceable push rod and the microswitch being fixed on described connection housing, described diaphragm is fixed on the inner face of described joint to seal the inner opening covering described air inlet through hole, one end of described push rod is fixing with described diaphragm to be connected, under the promotion of described diaphragm described push rod the other end trigger microswitch start make described alarm device be in standby in, when push rod leaves under the pulling of described diaphragm and cannot trigger microswitch startup, described alarm device starts to report to the police, described pressure monitoring switch also includes annular fixed station and groups of springs, described annular fixed station is fixed on the inside of described connection housing, it is provided with the through hole suitable with described push rod in described annular fixed station, the lower end edge lateral wall of the close described diaphragm of described push rod is provided with spring chuck, and described groups of springs is enclosed within described push rod between described spring chuck and annular fixed station lower surface, described microswitch includes fixed pedestal, fixed block, microswitch body and feeler lever, described microswitch is positioned at above described annular fixed station, described fixed pedestal is fixed on the inside connecting housing, and described fixed pedestal is provided with the through hole suitable with described microswitch body vertically, described fixed block is fixed on the upper surface of described fixed pedestal and tangent with the upper shed limit of described through hole, described microswitch body inserts the through hole of described fixed pedestal and fixing with fixed block is connected, the lower end of described microswitch body is fixed with described feeler lever, described push rod top contacts through the through hole of described annular fixed station with described feeler lever, the upper end of described microswitch body is signal output part, described signal output part is connected with described alarm device by wire.
2. pressure monitoring device according to claim 1, it is characterised in that: described diaphragm is stainless steel, and its thickness is 0.05mm.
3. pressure monitoring device according to claim 1, it is characterised in that: described groups of springs includes 3-6 group saucer washer formula spring, and the thickness often organizing described spring is 2mm-4mm.
4. pressure monitoring device according to claim 1, it is characterized in that, described connection housing includes connector and rear cover body, described connector and described rear cover body are the tubular construction of both ends open, the open top end lateral wall of described connector is provided with external screw thread, the bottom open end medial wall of described rear cover body is provided with female thread, in order to be fixed on bottom described rear cover body by described connector top; It is provided with the connector through hole being mutually communicated along axis inside described connector; Described connector bottom open end is inwardly formed the first cavity, and its open top end is inwardly formed the second cavity; Described nipple tip radially protrudes formation one annular boss, described first cavity is suitable with described joint annular boss, in order to by nested for described joint annular boss extremely described first cavity, the top of described joint is provided with Gask-O-Seal, and the described joint annular boss position corresponding with described first cavity inner bottom surface is provided with the annular groove suitable with described Gask-O-Seal; The described connector bottom open end position corresponding with described joint annular boss is provided with fixing chuck, is fixed in described first cavity in order to be sealed by described joint annular boss; Described first cavity inner bottom surface is centrally along being axially formed a concave station; Described fixed pedestal is arranged in the open top end of described rear cover body, described fixed pedestal is cylindrical structure and lateral wall is provided with the external screw thread corresponding with described rear cover body bottom open end medial wall female thread, in order to be fixed in rear cover body bottom open end by the mode of screw-threaded engagement; Described annular fixed station is fixedly installed on the position that described rear cover body bottom open end medial wall is corresponding with described push rod top.
5. a kind of pressure monitoring device according to claim 4, it is characterized in that: what the open top end medial wall of described rear cover body was corresponding with the top of described microswitch body is provided with fixing plate, described fixing plate is close on the top end surface of described microswitch body, described fixing plate is provided with wire guide, derives in order to the described wire connected on microswitch body top.
6. a kind of pressure monitoring device according to claim 5, it is characterized in that: described rear cover body open top end inner face is cast with epoxy resin layer between described fixing plate, described epoxy resin layer is provided with lead channels, in order to described wire is derived, described rear cover body open top end is provided with cover plate along end face, described cover plate is provided with lead channels, in order to be derived by wire.
7. a kind of pressure monitoring device according to claim 1, it is characterised in that: described connection housing, described joint, described push rod, described fixed pedestal adopt carbon constructional quality steel material.
8. a fire extinguisher, pressure vessel to be monitored including internal high-voltage gas, it is characterized in that: also include the described a kind of pressure monitoring device of one of claim 1-7, described pressure vessel to be monitored is provided with and the internal thread interface being connected bottom described joint, described gases at high pressure are nitrogen, and described pressure vessel to be monitored is pressure bottle.
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