CN116236714A - Connecting structure of pressure reducer and gas cylinder valve for air respirator - Google Patents

Abstract

The utility model relates to a connection structure's field especially relates to a connection structure for pressure reducer and gas cylinder valve of air respirator, including fixed connection in the link of pressure reducer, fixed connection in the gas cylinder valve and with the link can dismantle the connection mutually so that the pressure reducer communicates in the valve section of thick bamboo of gas cylinder valve, sliding connection has the pressure measurement piece that can send the gas promotion to carry out corresponding removal by the gas cylinder valve in the valve section of thick bamboo, be equipped with in the valve section of thick bamboo and force the pressure measurement piece and reset and control the pressure measurement piece and remove the reset spring of distance under the air current of different pressures when the gas cylinder valve is closed, the link is equipped with the cover and locates the end section of thick bamboo of valve section of thick bamboo, end section of thick bamboo sliding connection has the piece that pops out, end section of thick bamboo is equipped with can make when the pressure measurement piece removes the distance under the air current effect that the effect reaches the biggest and makes the piece that pops out, possess the gas cylinder valve and can carry out unified production, need not divide into two kinds of manufacturing production respectively, also be convenient for the gas cylinder valve corresponds the effect of the installation of two kinds of different specification gas cylinders.

Description

Connecting structure of pressure reducer and gas cylinder valve for air respirator

Technical Field

The application relates to the field of connection structures, in particular to a connection structure of a pressure reducer and a gas cylinder valve for an air respirator.

Background

The air respirator is a wearing tool used for working under special environments such as dense smoke of fire or hypoxia, leakage of harmful substances and the like, and provides breathing guarantee for related operators.

The prior air respirator generally comprises a pressure reducer connected with an air bottle, a mask worn by a user, and an air supply valve arranged on the mask and connected with the pressure reducer to adjust the pressure of air entering the mask, wherein the air bottle valve used for controlling the air in the air bottle to be discharged is arranged on the air bottle, and the air bottle valve is detachably connected with the pressure reducer. Because the pressure of the gas cylinder has a plurality of specifications, the corresponding pressure reducer is also adapted to the plurality of specifications, when the pressure reducer can bear the pressure with the maximum pressure value smaller than that of the gas cylinder, the pressure reducer is more easily damaged, therefore, the applicant proposes a patent application of publication No. CN207838054, and different bosses or grooves are arranged on the pressure reducers and the gas cylinder valves with different specifications, so that the pressure reducer with the smaller pressure value can not be connected with the gas cylinder valve with higher gas pressure, and the possibility of accidents is reduced.

In view of the above-mentioned related art, the gas cylinder valves corresponding to the two gas cylinders with different specifications are different, so that when the gas cylinder valve is installed corresponding to the gas cylinder, it is also necessary to repeatedly confirm that the gas cylinder valve installed by the gas cylinder with different gas pressures is correct, and the connection structure of the two gas cylinder valves for the pressure reducer is different, and the two gas cylinder valves need to be manufactured separately, so that batch manufacturing cannot be performed uniformly, and there is a defect that the gas cylinder valve production and installation process is relatively inconvenient.

Disclosure of Invention

In order to facilitate the production and installation of the cylinder valve, the application provides a connection structure of a pressure reducer and the cylinder valve for an air respirator.

The application provides a connection structure for pressure reducer and gas cylinder valve of air respirator adopts following technical scheme.

The utility model provides a connection structure for pressure reducer and gas cylinder valve of air respirator, includes fixed connection in the link of pressure reducer, fixed connection in the gas cylinder valve and with the link can dismantle the valve section of thick bamboo of being connected so that pressure reducer intercommunication in the gas cylinder valve mutually, sliding connection has the survey briquetting that can carry out corresponding removal by the promotion of gas cylinder valve gas delivery in the valve section of thick bamboo, is equipped with in the valve section of thick bamboo and can force the survey briquetting and reset when the gas cylinder valve closes and control survey briquetting and remove the reset spring of distance under the air current of different pressures, the link is equipped with the end section of thick bamboo that the cover was located the valve section of thick bamboo, end section of thick bamboo sliding connection has the piece that pops out, and end section of thick bamboo is equipped with can make when survey briquetting removal distance under the air current effect and pop out the reaction mechanism that the piece moved when reaching the maximum.

Through adopting above-mentioned technical scheme, when the gas cylinder valve is opened, high-pressure gas in the gas cylinder passes through pressure measurement piece department earlier, then get into in the pressure reducer again, high-pressure gas makes pressure measurement piece produce corresponding removal, and because reset spring's existence for the removal interval that pressure measurement piece can be forced to different pressure gas exists different, set up end section of thick bamboo and corresponding pop-up piece and reaction mechanism on the link of pressure reducer that bears the atmospheric pressure ability is little, make when the gas cylinder pressure is greater than the pressure of pressure reducer, the pressure measurement piece can remove more than under great gas pressure effect, then trigger reaction mechanism, make pop-up piece remove, for the user knows, the gas cylinder pressure value of little pressure needs to be changed at this moment, make and need not divide into two kinds of circumstances at the gas cylinder valve and corresponding valve section of thick bamboo and make respectively, also need not install the gas cylinder valve respectively with two kinds of different pressure gas cylinders that correspond, it is comparatively convenient.

Optionally, the valve cylinder is internally provided with a pressure measuring channel and an air flow channel, the air flow channel and the pressure measuring channel are both communicated with the air bottle valve, the air flow channel is communicated with the pressure reducer, and one end of the pressure measuring block is positioned in the pressure measuring channel.

Through adopting above-mentioned technical scheme, set up air current way and pressure measurement way respectively for the in-process gas of gas from valve section of thick bamboo flow direction link is difficult for receiving great the blocking, makes the gas smoothly flow.

Optionally, the pressure measuring channel is connected with an in-channel block in a sliding way along the length direction of the pressure measuring channel, the in-channel block is abutted against the pressure measuring block, the in-road block and the pressure measuring block are arranged in an inclined plane at one end which is abutted against each other, so that the in-road block can push the pressure measuring block to move.

Through adopting above-mentioned technical scheme for the gas that gets into the pressure measurement way can all promote the intra-area piece and remove, make the intra-area piece better by promoting, make the pressure measurement piece can better be promoted, with the different distances of removal that will not atmospheric pressure with the pressure measurement piece react better.

Optionally, the reaction mechanism includes can the butt in pressure measurement piece expose in valve section of thick bamboo one side and sliding connection in the butt pole that pops out the piece, fixed connection in the section of thick bamboo internal block in the end section of thick bamboo, fixed connection in the butt pole and can the butt in the limit that the piece is close to pressure measurement piece one side pops out the piece, locates to pop out the piece and forces the butt pole spring that the butt pole moved towards the pressure measurement piece, locates in the section of thick bamboo piece and keep away from pressure measurement piece one side and force to pop out the piece and keep away from the spring that pops out of pressure measurement piece.

Through adopting above-mentioned technical scheme, when atmospheric pressure is great, the pressure measurement piece promotes the butt pole and removes for limit pop-up block synchronous motion makes limit pop-up block no longer receive the butt of section of thick bamboo internal block, pops up the spring and forces to pop-up block removal this moment, in order to inform the user that the gas cylinder pressure is too big this moment.

Optionally, the limit is popped out the piece and is set up towards one side of pressure measurement piece in the slope of limit, limit pop out the piece and can be pressed in the section of thick bamboo piece in order to force limit to pop out the piece and remove and make the butt pole spring compressed.

Through adopting above-mentioned technical scheme for when needs reset after popping up the piece, only need with pop up the piece push in end section of thick bamboo can, need not initiatively remove the butt pole again and make the limit pop up the piece can not contradict in section of thick bamboo piece keep away from the side of survey briquetting, so that pop up the work of resetting of piece.

Optionally, the inner wall of the end barrel is tightly sleeved on the outer wall of the connecting end, and the outer wall of the connecting end is fixedly connected with an end wall block which can be detachably connected to the end face of the end barrel.

By adopting the technical scheme, the end cylinder is detached from the connecting end, so that when the pressure reducer is damaged or the ejection block cannot be ejected smoothly, the pressure reducer is detached and replaced respectively.

Optionally, an end step for tightly sleeving the valve cylinder is formed around the connecting end, an insert block capable of being inserted into the inner wall of the end step is fixedly connected to the end face of the valve cylinder, and an insert block positioning mechanism for fixing the insert block is arranged in the connecting end.

Through adopting above-mentioned technical scheme, the link corresponds the valve section of thick bamboo and inserts for the inserted block is pegged graft in the end step, can connect between link and the valve section of thick bamboo, and is comparatively convenient.

Optionally, the insert positioning mechanism includes a positioning block slidably connected inside the connection end and inserted in the insert, a positioning block rod disposed on the positioning block and driving the positioning block to move and exposed outside the connection end, a positioning block spring disposed inside the connection end and forcing the positioning block to be tightly inserted in the insert, and a side surface of the positioning block abutting against the end of the insert is an inclined surface so that the positioning block can be pushed by the insert to move.

By adopting the technical scheme, the plug can be directly plugged corresponding to the connecting end, and then the positioning block spring can force the positioning block to be tightly plugged in the plug, so that the connecting end and the valve cylinder are stably and conveniently connected.

Optionally, the connecting end stretches into valve section of thick bamboo one end and is the round platform formula, and valve section of thick bamboo inner wall laminating is in the round platform inclined plane of connecting end, and the round platform inclined plane of connecting end is equipped with the several sealing washer coaxially.

Through adopting above-mentioned technical scheme for in the link can be comparatively convenient stretches into the valve section of thick bamboo, and the setting of a plurality of sealing washer also makes the gaseous difficult round platform inclined plane laminating of valve section of thick bamboo and link leak from the valve section of thick bamboo in the valve section of thick bamboo.

Optionally, the inner wall of the end step is fixedly connected with a guide block, the guide block is inserted into the valve cylinder along the insertion direction of the insert block, and the guide block is inserted into one end of the valve cylinder in an arc shape.

By adopting the technical scheme, before the plug block is correspondingly inserted into the end step, the guide block is inserted into the valve cylinder first, so that the plug block can be smoothly aligned to a set position for insertion, and the connecting end and the valve cylinder are not easy to rotate relatively.

In summary, the present application includes at least one of the following beneficial effects:

1. the gas cylinder valve and the corresponding valve cylinder are not required to be manufactured respectively in two conditions, and the gas cylinders corresponding to the gas cylinder valve and the gas cylinder valve with two different pressures are not required to be installed respectively, so that the gas cylinder valve is convenient;

2. the connecting end is inserted corresponding to the valve cylinder, so that the insert block is inserted into the end step, and the connecting end and the valve cylinder can be connected conveniently.

Drawings

FIG. 1 is a schematic view of the structure of the present application in a state where the connection end is not inserted into the valve cartridge;

FIG. 2 is a schematic cross-sectional structural view of the connecting end, valve cartridge, end wall block, end cartridge and outer wall block;

FIG. 3 is an enlarged view at A in FIG. 2;

fig. 4 is an enlarged view at B in fig. 2.

Reference numerals illustrate: 1. a connection end; 2. a valve cylinder; 3. a pressure block is measured; 31. a seal ring; 32. a guide block; 33. an outer wall block; 4. a return spring; 41. a butt rod spring; 42. a spring is ejected; 43. an end wall block; 44. inserting blocks; 45. an end step; 46. the inserting block positioning mechanism; 47. a positioning block; 48. a positioning block rod; 49. a positioning block spring; 5. an end cylinder; 51. ejecting the block; 52. a reaction mechanism; 53. a pressure measuring channel; 54. an air flow passage; 55. an intra-track block; 56. measuring a pressing block rod; 57. a butt joint rod; 58. a cylinder inner block; 59. the pop-up block is limited.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

The embodiment of the application discloses connection structure for pressure reducer and gas cylinder valve of air respirator, refer to fig. 1, including fixed connection and intercommunication in gas cylinder valve send out the valve section of thick bamboo 2 of gas one end opening part, valve section of thick bamboo 2 is kept away from gas cylinder valve one end and is installed link 1, link 1 is kept away from valve section of thick bamboo 2 one end fixed connection and is linked together in the air inlet one end department of pressure reducer, link 1 is the round platform type towards valve section of thick bamboo 2 one end, valve section of thick bamboo 2 inner wall department also has the position that is the round platform type that corresponds, and on the round platform inclined plane of link 1 along self axis direction coaxial inlaying a plurality of sealing washer 31, the round platform type one end of link 1 stretches into in the valve section of thick bamboo 2, and make sealing washer 31 sticiss, in order to make between link 1 and the valve section of thick bamboo 2 zonulae occludens, make gas that the gas cylinder valve sent out can get into the pressure reducer through valve section of thick bamboo 2 and link 1.

Referring to fig. 2, an end step 45 is coaxially provided on the circumferential outer wall of the connecting end 1 near one end of the truncated cone, the valve cylinder 2 is tightly slidably connected to the circumferential inner wall of the end step 45 along the axial direction of the connecting end 1, the end face of the valve cylinder 2 can be abutted to the end face inner wall of the end step 45, the circumferential inner wall of the end step 45 is fixedly connected with a guide block 32, the length direction of the guide block 32 is consistent with the axial direction of the connecting end 1, one end of the guide block 32, which faces the valve cylinder 2, is arc-shaped, and the guide block 32 is tightly inserted into the valve cylinder 2 along the length direction of the valve cylinder 2, so that the circumferential positions of the connecting end 1 and the valve cylinder 2 are aligned. The end face of the valve cylinder 2 is symmetrically and fixedly connected with two inserting blocks 44 by taking the axis of the valve cylinder 2 as a center, the length direction of the inserting blocks 44 is consistent with the axis direction of the valve cylinder 2, the inserting blocks 44 are inserted into the inner wall of the end face of the end step 45 along the length direction of the inserting blocks, the inserting blocks 44 are inserted into one end of the end step 45 to form an arc, and the length of each inserting block 44 is smaller than that of the guide block 32, so that after the guide block 32 is inserted into the valve cylinder 2, the inserting blocks 44 are inserted into the inner wall of the end step 45 correspondingly.

Referring to fig. 2 and 3, the positions corresponding to the insertion of two insertion blocks 44 in the connection end 1 are respectively provided with an insertion block positioning mechanism 46 for fixing the insertion blocks 44, the insertion block positioning mechanism 46 comprises a positioning block 47 radially and slidably connected to the inside of the connection end 1 along the connection end 1, one end of the positioning block 47, which is close to the insertion block 44, is provided with an inclined surface, and the end of the insertion block 44 can be abutted against the inclined surface of the positioning block 47 in the process of inserting the insertion block 44 into the inner wall of the end step 45, so that the positioning block 47 is far away from the axis of the connection end 1. The positioning block spring 49 is placed in the connecting end 1, and two ends of the positioning block spring 49 are respectively abutted against the positioning block 47 and the inner wall of the connecting end 1, so that the positioning block 47 can be tightly inserted into the surface of the insert block 44, which is away from the axis of the connecting end 1. One end of the positioning block 47, which is far away from the inserting block 44, is fixedly connected with a positioning block rod 48 inserted into a positioning block spring 49, and one end of the positioning block rod 48, which is far away from the positioning block 47, penetrates through the circumference outer wall of the connecting end 1 along the moving direction of the positioning block 47, so that when the connecting end 1 and the valve cylinder 2 are required to be separated, the positioning block rod 48 is pulled outwards, the positioning block 47 is separated from the inserting block 44, and the connecting end 1 and the valve cylinder 2 can be far away from each other.

Referring to fig. 2, the diameter of the inner wall of the end part of the valve cylinder 2 far away from the connecting end 1 is far smaller than the inner diameter of the end part of the valve cylinder 2 near the connecting end 1, the end with the small inner diameter of the valve cylinder 2 is an air flow channel 54, and a corresponding channel and the air flow channel 54 are arranged at the center of the end face of the connecting end 1 and are communicated in an aligned mode. The valve cylinder 2 is internally provided with a pressure measuring channel 53 communicated with the air flow channel 54, the length direction of one end of the pressure measuring channel 53 connected with the air flow channel 54 is inclined, one end of an inclined section of the pressure measuring channel 53 away from the air flow channel 54 is close to the connecting end 1, the length direction of one end of the pressure measuring channel 53 away from the air flow channel 54 is consistent with the axial direction of the valve cylinder 2, the inner wall of the pressure measuring channel 53 away from the air flow channel 54 is tightly connected with an in-channel block 55 in a sliding manner along the length direction of the inner wall, and the in-channel block 55 cannot enter the inclined section of the pressure measuring channel 53 through the turning point of the pressure measuring channel 53. To effect the installation of the in-channel block 55, the valve cartridge 2 may initially be split into two parts at the portion of the pressure channel 53 into which the in-channel block 55 is placed, after which the in-channel block 55 is placed into the corresponding pressure channel 53, and the two parts of the valve cartridge 2 are welded to form one complete valve cartridge 2.

Referring to fig. 2, the inside of the valve cylinder 2 is slidingly connected with a pressure measuring block 3 along the radial direction thereof, the end of the pressure measuring block 3 enters into the end of the pressure measuring channel 53 far away from the air flow channel 54, the end of the inner channel block 55 far away from the turning point of the pressure measuring channel 53 is abutted against the end of the pressure measuring block 3, and corresponding sealing rings 31 are arranged at the peripheral side surfaces of the pressure measuring block 3 and the inner channel block 55, so that gas is not easy to flow out from the pressure measuring channel 53. The side surface of one end of the in-path block 55, which is abutted against the pressure measuring block 3, is obliquely arranged, so that the pressure measuring block 3 can be pushed to move under the action of high-pressure gas in the in-path block 55. The reset spring 4 is placed in the valve cylinder 2, and two ends of the reset spring 4 are respectively abutted against one end, far away from the in-channel block 55, of the pressure measuring block 3 and the inner wall of the valve cylinder 2, so that the pressure measuring block 3 can have a trend of moving towards the pressure measuring channel 53, and the moving distance of the pressure measuring block 3 is inconsistent when the gas with different pressures moves by pushing the in-channel block 55. One end of the pressure measuring block 3, which is abutted against the return spring 4, is integrally provided with a pressure measuring block rod 56, and the pressure measuring block rod 56 penetrates through the valve cylinder 2 along the moving direction of the pressure measuring block 3.

Referring to fig. 2 and 4, since the pressure reducer with the applied air pressure can be applied to the air cylinder with the small air pressure, the structure below this is provided only on the connection end 1 of the pressure reducer with the small applied air pressure. The coaxial fixedly connected with end wall piece 43 of link 1 circumference outer wall, the end wall piece 43 is located locating piece 48 and exposes one end of link 1 towards valve section of thick bamboo 2 one side department, and the side butt that end wall piece 43 deviates from locating piece 48 has an end section of thick bamboo 5, and end section of thick bamboo 5 circumference inner wall coaxial inseparable cover is located link 1 circumference outer wall, and end section of thick bamboo 5 terminal surface butt in end wall piece 43 just can dismantle the connection through the screw, and end section of thick bamboo 5 cover is located valve section of thick bamboo 2 and can not butt in pressure measurement piece pole 56. The circumference outer wall integrated into one piece of end section of thick bamboo 5 has outer wall piece 33, and outer wall piece 33 one end is close to the one end that survey briquetting pole 56 exposed valve section of thick bamboo 2, and outer wall piece 33 length direction is consistent with end section of thick bamboo 5 axis direction, and outer wall piece 33 is equipped with can make when survey briquetting 3 under the effect of air current travel distance reach the biggest reaction mechanism 52 that pops out the piece 51 and carry out the removal.

Referring to fig. 4, the reaction mechanism 52 includes an ejecting block 51 slidably connected to the inside of the outer wall block 33 along the length direction of the outer wall block 33, one end of the ejecting block 51 away from the pressure measuring block 56 can be exposed to the outer wall block 33, one end of the ejecting block 513 facing the pressure measuring block 56 is slidably connected with a supporting rod 57, the supporting rod 57 moves along the moving direction of the pressure measuring block 56, one end section of the supporting rod 57 located in the ejecting block 51 is T-shaped, the supporting rod 57 moves stably, a supporting rod spring 41 is fixedly connected in the ejecting block 51, the end of the supporting rod spring 41 is fixedly connected to the surface of the supporting rod 57 facing away from the axis of the valve cylinder 2, and the supporting rod spring 41 enables the supporting rod 57 to move towards the axis of the valve cylinder 2. One side of the abutting rod 57, which is away from the abutting rod spring 41, is fixedly connected with a limited ejecting block 59, the inside of the outer wall block 33 is fixedly connected with a cylinder inner block 58, one end face of the ejecting block 51, which is connected with the abutting rod 57, can be abutted against the side face of the cylinder inner block 58, which is away from the measuring block 56, and the side face of the ejecting block 59, which is towards the ejecting block 51, can be abutted against the side face of the cylinder inner block 58, which is away from the ejecting block 51. Two ejector springs 42 are fixedly connected between the inner barrel block 58 and the adjacent side surface of the ejector block 51, and the ejector springs 42 force one end of the ejector block 51 far away from the abutting rod 57 to be exposed to the outer wall block 33.

Referring to fig. 4, the end of the abutting rod 57 remote from the eject block 51 is opposite to the measurement block rod 56. When the cylinder pressure is small, there is a fine space or just abutting between the pressure measurement block rod 56 and the abutment rod 57. When the pressure of the gas cylinder is high, the pressure measuring block rod 56 can push the abutting rod 57 to move, so that the abutting rod spring 41 is compressed until the ejection limiting block 51 is not limited by the in-cylinder block 58 any more, at this time, the ejection spring 42 is extended, the ejection block 51 is forced to be exposed to the outer wall block 33, and the ejection spring 42 and the abutting rod 57 are not in the same straight line, so that when the ejection block 51 is exposed to the outer wall block 33, the abutting rod 57 and the ejection limiting block 59 cannot touch the ejection spring 42. The side surface of the ejection limiting block 59, which faces away from the ejection block 51, is inclined, so that when the ejection block 59 needs to be reset and pressed back into the outer wall block 33, the inclined surface of the ejection limiting block 59 can be abutted against the in-cylinder block 58, and the ejection limiting block 59 can smoothly move through the in-cylinder block 58.

The connection structure implementation principle of the pressure reducer and the gas cylinder valve for the air respirator is as follows: during connection, one end of the truncated cone of the connection end 1 is inserted into the valve cylinder 2, the guide block 32 is correspondingly inserted into the valve cylinder 2, so that the two insertion blocks 44 are inserted into the corresponding end steps 45 until the end face of the valve cylinder 2 abuts against the end wall block 43, at the moment, the positioning block 47 is inserted into the side face of the insertion block 44, so that the insertion block 44 is difficult to separate from the end steps 45, and tight connection between the connection end 1 and the valve cylinder 2 is completed.

After the connection is completed, the gas cylinder valve is opened, so that high-pressure gas enters the gas flow channel 54, then a part of gas also enters the pressure measuring channel 53, so that the in-channel block 55 is pushed, the pressure measuring block 3 is pushed, the return spring 4 is compressed, the pressure measuring block rod 56 moves towards the abutting rod 57, if the gas pressure of the gas cylinder is too large, the abutting rod 57 is pushed, the ejection limiting block 59 is not blocked by the in-cylinder block 58 any more, at the moment, the ejection block 51 can force the ejection block 51 to move under the action of the ejection spring 42, and then the ejection block 51 can be exposed to the outer wall block 33, so that a user knows that a pressure reducer with small applicable pressure is communicated with the gas cylinder with too large pressure at the moment.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The utility model provides a connection structure for pressure reducer and gas cylinder valve of air respirator, includes fixed connection in link (1) of pressure reducer, fixed connection in gas cylinder valve and can dismantle with link (1) and be connected so that pressure reducer communicates in valve cylinder (2) of gas cylinder valve, its characterized in that: the valve cylinder (2) is slidably connected with a pressure measuring block (3) which can be pushed by gas sent by a gas cylinder valve to move correspondingly, a reset spring (4) which can force the pressure measuring block (3) to reset when the gas cylinder valve is closed and control the pressure measuring block (3) to move at different pressure under the gas flow is arranged in the valve cylinder (2), the connecting end (1) is provided with an end cylinder (5) sleeved on the valve cylinder (2), the end cylinder (5) is slidably connected with an ejecting block (51), and the end cylinder (5) is provided with a reaction mechanism (52) which can enable the ejecting block (51) to move when the moving distance of the pressure measuring block (3) under the action of the gas flow is maximum.

2. The connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 1, wherein: the valve cylinder (2) is internally provided with a pressure measuring channel (53) and an air flow channel (54), the air flow channel (54) and the pressure measuring channel (53) are both communicated with the air cylinder valve, the air flow channel (54) is communicated with the pressure reducer, and one end of the pressure measuring block (3) is positioned in the pressure measuring channel (53).

3. A connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 2, characterized in that: the pressure measuring channel (53) is internally provided with a channel inner block (55) in a sliding manner along the length direction of the pressure measuring channel, the channel inner block (55) is abutted to the pressure measuring block (3), and the abutting ends of the channel inner block (55) and the pressure measuring block (3) are inclined planes so that the channel inner block (55) can push the pressure measuring block (3) to move.

4. The connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 1, wherein: the reaction mechanism (52) comprises a propping rod (57) which can be propped against the pressure measuring block (3) to be exposed on one side of the valve cylinder (2) and is slidably connected with the pop-up block (51), an in-cylinder block (58) which is fixedly connected with the end cylinder (5), a limited pop-up block (59) which is fixedly connected with the propping rod (57) and can be propped against one side of the in-cylinder block (58) close to the pressure measuring block (3), a propping rod spring (41) which is arranged on the pop-up block (51) and forces the propping rod (57) to move towards the pressure measuring block (3), and a pop-up spring (42) which is arranged on one side of the in-cylinder block (58) away from the pressure measuring block (3) and forces the pop-up block (51) to be away from the pressure measuring block (3).

5. The connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 4, wherein: the ejection limiting block (59) is obliquely arranged towards one side of the measuring block (3), and the inclined surface of the ejection limiting block (59) can be abutted against the in-cylinder block (58) to force the ejection limiting block (59) to move and enable the abutting rod spring (41) to be compressed.

6. The connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 1, wherein: the inner wall of the end barrel (5) is tightly sleeved on the outer wall of the connecting end (1), and the outer wall of the connecting end (1) is fixedly connected with an end wall block (43) which can be detachably connected to the end face of the end barrel (5).

7. A connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 2, characterized in that: an end step (45) for tightly sleeving the valve cylinder (2) is formed around the connecting end (1), an inserting block (44) which can be inserted into the inner wall of the end step (45) is fixedly connected to the end face of the valve cylinder (2), and an inserting block positioning mechanism (46) for fixing the position of the inserting block (44) is arranged in the connecting end (1).

8. The connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 7, wherein: the inserting block positioning mechanism (46) comprises a positioning block (47) which is connected inside the connecting end (1) in a sliding mode and inserted into the inserting block (44), a positioning block rod (48) which is arranged on the positioning block (47) and drives the positioning block (47) to move and expose out of the connecting end (1), and a positioning block spring (49) which is arranged in the connecting end (1) and forces the positioning block (47) to be tightly inserted into the inserting block (44), wherein the side face of the end portion of the positioning block (47) is abutted against the inserting block (44) to be an inclined plane so that the positioning block (47) can be pushed by the inserting block (44) to move.

9. The connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 7, wherein: one end of the connecting end (1) extending into the valve cylinder (2) is in a truncated cone shape, the inner wall of the valve cylinder (2) is attached to the truncated cone inclined surface of the connecting end (1), and a plurality of sealing rings (31) are coaxially arranged on the truncated cone inclined surface of the connecting end (1).

10. The connection structure of a pressure reducer and a cylinder valve for an air respirator according to claim 7, wherein: the inner wall of the end step (45) is fixedly connected with a guide block (32), the guide block (32) is inserted into the valve cylinder (2) along the insertion direction of the insertion block (44), and one end of the guide block (32) inserted into the valve cylinder (2) is arc-shaped.

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