CN218118657U

CN218118657U - Adjustable pressure stop pressure-reducing combined valve

Info

Publication number: CN218118657U
Application number: CN202221987873.2U
Authority: CN
Inventors: 陈光友; 祝建磊; 康和银; 雷华柯; 刘小林
Original assignee: Chongqing Huayu Electric Instrument Group Co Ltd
Current assignee: Chongqing Huayu Electric Instrument Group Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-12-23
Anticipated expiration: 2032-07-29

Abstract

The utility model discloses a pressure-adjustable stop pressure-reducing combined valve, which comprises a combined valve body, a valve cover and a stop valve disc, wherein the other end of the combined valve body is detachably provided with the valve cover; be equipped with the piston rod in the decompression valve chamber, another pot head of piston rod is equipped with the piston dish, the piston rod run through this piston dish and with piston dish threaded connection be equipped with the pressure regulating spring between combination valve body and the piston dish, have the clearance between the upper end of piston dish and the valve gap be equipped with in the piston rod along its axially extending's air flue. The utility model discloses an outlet pressure is adjustable in the certain limit, is suitable for with different breathing regulator, can guarantee that batch production's pressure reducer export is unanimous, and pressure regulating mechanism is simple, and the whole appearance of pressure reducer is small and exquisite, and light in weight can satisfy the respirator and bear lightly, and the appearance is little, and resistance requires such as little under water.

Description

Pressure-adjustable stop pressure-reducing combined valve

Technical Field

The utility model relates to a combination valve technical field, concretely relates to adjustable pressure is by decompression combination valve for breathing apparatus under water.

Background

The stop-decompression combined valve has compact structure and small appearance, and particularly, the piston type decompression valve has simple structure and stable performance, thereby being widely popularized and used in the aspect of escape breathing equipment. However, in the existing stop-relief combined valve, the pressure relief valve part generally has difficulty in regulating the outlet pressure; even if the pressure regulating function is provided, the regulating structure is complex, so that the combined valve has a large appearance and heavy weight, and the storage, wearing and use of the escape respirator are influenced.

Disclosure of Invention

The aforesaid to prior art is not enough, the utility model aims to solve the technical problem that: the pressure-adjustable stop-pressure reduction combined valve has the advantages that the outlet pressure can be adjusted within a certain range, the combined valve is suitable for different breathing regulators, the outlet pressure of the combined valve produced in batches can be guaranteed to be consistent, the pressure-adjusting mechanism is simple, the overall appearance of the combined valve is small and exquisite, the weight is light, the requirements of a respirator for light bearing, small appearance, small underwater resistance and the like can be met.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a pressure-adjustable stop pressure-reducing combined valve comprises a combined valve body, wherein a high-pressure air inlet channel and a high-pressure air outlet channel are arranged in the combined valve body, the high-pressure air inlet channel penetrates through one end of the combined valve body to form a high-pressure air inlet end, and the high-pressure air outlet channel penetrates through the other end of the combined valve body to form a high-pressure air outlet end; a stop valve cavity is arranged between the high-pressure air inlet channel and the high-pressure air outlet channel, a stop valve disc is arranged in the stop valve cavity and connected with a stop valve adjusting mechanism arranged on the combined valve body, and the stop valve adjusting mechanism can be adjusted to drive the stop valve disc to close the high-pressure air inlet channel;

a valve cover is arranged at the high-pressure air outlet end of the combined valve body, a pressure reducing valve cavity is formed between the valve cover and the combined valve body, a low-pressure air outlet channel is arranged on the valve cover, and the low-pressure air outlet channel is communicated with the pressure reducing valve cavity;

a piston disc is arranged in the pressure reducing valve cavity and is connected with the valve cover in a sliding fit manner; the piston disc is provided with a piston rod, the piston rod penetrates through the end faces of the two ends of the piston disc and is in threaded connection with the piston disc, correspondingly, the valve cover is provided with a piston rod adjusting mechanism, and the piston rod can drive the piston disc to move along the axial direction of the piston rod by rotating the piston rod through the piston rod adjusting mechanism; one end of the piston rod, which is far away from the piston disc, is right opposite to the high-pressure air outlet end, and the high-pressure air outlet end can be sealed; a pressure regulating spring is arranged between the piston disc and the combined valve body, one end of the pressure regulating spring is connected with the combined valve body, the other end of the pressure regulating spring is connected with the piston disc, in an initial state, under the action of the pressure regulating spring, one end of the piston rod close to the combined valve body is attached to the high-pressure air outlet end and seals the high-pressure air outlet end, and a gap is formed between the piston disc and the valve cover;

an air passage extending along the axial direction of the piston rod is arranged in the piston rod, one end of the air passage is communicated with the pressure reducing valve cavity, and the other end of the air passage is communicated with a gap between the piston disc and the valve cover.

Furthermore, the piston rod adjusting mechanism comprises an adjusting hole formed in the valve cover, the adjusting hole is opposite to one end part, close to the valve cover, of the piston rod, and an adjusting groove is correspondingly formed in the end part of the piston rod, at the end part; and a plug is arranged in the adjusting hole to seal the adjusting hole.

Furthermore, a groove is formed in the position, opposite to the piston disc, of the valve cover and is communicated with the low-pressure air outlet channel; one end of the piston rod, which is close to the valve cover, extends into the groove, and the groove is communicated with the air passage.

Furthermore, a pressure reducing valve disc is arranged at one end, close to the high-pressure air outlet end, of the piston rod, the piston rod is rotatably connected with the pressure reducing valve disc, a sealing gasket is arranged at one end, close to the high-pressure air outlet end, of the pressure reducing valve disc, and the sealing gasket can be attached to the high-pressure air outlet end and is sealed.

Furthermore, a limit groove is arranged on the combined valve body corresponding to the piston rod, and the high-pressure air outlet end is positioned at the inner end of the limit groove; a limit nut is arranged in the limit groove, and one end of the piston rod, which is close to the combined valve body, penetrates through the limit nut and is connected with the limit nut in a sliding fit manner; when the piston rod seals the high-pressure air outlet end under the action of the pressure regulating spring, the end face of the limiting nut close to the valve cover is attached to the end face of the piston disc close to the combined valve body.

Furthermore, a gap is formed between the end face, far away from the valve cover, of the limiting nut and the inner end of the limiting groove, and the part, extending into the gap, of the piston rod forms an air inlet section; a gap is formed between the air inlet section and the limiting groove, a plurality of air inlets are formed in the side wall of the air inlet section, and the air inlets are distributed along the circumferential direction of the air inlet section; one end of the air inlet hole is communicated with the gap between the air inlet section and the limiting groove, and the other end of the air inlet hole is communicated with the air passage.

Furthermore, stop valve adjustment mechanism includes the valve rod that links to each other with the stop valve disc, the one end activity that the stop valve disc was kept away from to the valve rod is equipped with the hand wheel, rotates this hand wheel and can drive the valve rod and remove to promote the stop valve disc and seal high pressure inlet channel.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a piston rod and piston dish adopt threaded connection, make the relative position of piston dish on the piston rod adjust, thereby convenient regulation pressure regulating spring's initial deflection, and then change the opening pressure and the size of relief pressure valve disk, and the gaseous clearance action that passes through between piston dish and the valve rod after the decompression acts on the piston dish, and then acts on the piston rod, with the pressure of balanced high-pressure gas effect on the relief pressure valve disk, thereby realize high-pressure gas's decompression and regulation, the utility model discloses a pressure that low pressure gas outlet channel was adjusted to regulation pressure regulating spring's deflection, pressure regulating mechanism and piston integrated design to fuse together with the stop valve, make the combination valve appearance small and exquisite, light in weight, resistance is little under water. The air outlet pressure of the low-pressure air outlet channel can be adjusted as required, and the range of matching with a respirator is larger; by adjusting the pressure regulating mechanism, the combined valve is more quickly and conveniently debugged, and the outlet pressure of the combined valve produced in batches is ensured to be consistent.

Drawings

Fig. 1 is a schematic structural view of the present invention;

in the figure, 1 combined valve body, 2 high-pressure air inlet channel, 3 spacing groove, 4 valve covers, 5 low-pressure air outlet channel, 6 stop valve discs, 7 piston rods, 8 pressure reducing valve discs, 9 piston discs, 10 pressure regulating springs, 11 grooves, 12 air passages, 13 plugs, 14 high-pressure air outlet channel, 15 spacing nuts, 16 air inlet holes, 17 sealing gaskets, 18 valve rods and 19 hand wheels.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

Example (b):

as shown in fig. 1, a pressure-adjustable stop and pressure-reduction combined valve comprises a combined valve body 1, wherein a high-pressure air inlet channel 2 and a high-pressure air outlet channel 14 are arranged in the combined valve body 1, the high-pressure air inlet channel 2 penetrates through one end of the combined valve body 1 to form a high-pressure air inlet end, and the high-pressure air outlet channel 14 penetrates through the other end of the combined valve body 1 to form a high-pressure air outlet end; a stop valve cavity is arranged between the high-pressure air inlet channel 2 and the high-pressure air outlet channel 14, a stop valve disc 6 is arranged in the stop valve cavity, the stop valve disc 6 is connected with a stop valve adjusting mechanism arranged on the combined valve body 1, and the stop valve adjusting mechanism can be adjusted to drive the stop valve disc 6 to close the high-pressure air inlet channel 2;

a valve cover 4 is arranged at the high-pressure air outlet end of the combined valve body 1, a pressure reducing valve cavity is formed between the valve cover 4 and the combined valve body 1, a low-pressure air outlet channel 5 is arranged on the valve cover 4, and the low-pressure air outlet channel 5 is communicated with the pressure reducing valve cavity;

a piston disc 9 is arranged in the pressure reducing valve cavity, and the piston disc 9 is connected with the valve cover 4 in a sliding fit manner; a piston rod 7 is arranged on the piston disc 9, the piston rod 7 penetrates through the end faces of the two ends of the piston disc 9 and is in threaded connection with the piston disc 9, correspondingly, a piston rod 7 adjusting mechanism is arranged on the valve cover 4, and the piston rod 7 can be rotated by the piston rod 7 adjusting mechanism to drive the piston disc 9 to move along the axial direction of the piston rod 7; one end of the piston rod 7, which is far away from the piston disc 9, is opposite to the high-pressure air outlet end, and the high-pressure air outlet end can be sealed; a pressure regulating spring 10 is arranged between the piston disc 9 and the combined valve body 1, one end of the pressure regulating spring 10 is connected with the combined valve body 1, the other end of the pressure regulating spring is connected with the piston disc 9, one end of the piston rod 7, which is close to the combined valve body 1, is attached to and seals the high-pressure air outlet end under the action of the pressure regulating spring 10 in an initial state, and a gap is formed between the piston disc 9 and the valve cover 4;

an air passage 12 extending along the axial direction of the piston rod 7 is arranged in the piston rod, one end of the air passage 12 is communicated with the pressure reducing valve cavity, and the other end of the air passage 12 is communicated with a gap between the piston disc 9 and the valve cover 4.

Adopt threaded connection through piston rod 7 and piston dish 9, make the relative position of piston dish 9 on piston rod 7 adjustable, thereby the initial deflection of convenient regulation pressure regulating spring 10, and then change opening pressure and the size of relief pressure valve disk 8, and the gas after the decompression reacts piston dish 9 through the clearance between piston dish 9 and the valve rod 18, with the pressure of balanced high-pressure gas effect on relief pressure valve disk 8, thereby realize high-pressure gas's decompression and regulation, the pressure in low pressure outlet channel 5 exit is adjusted to deflection through adjusting regulating spring.

The adjusting mechanism of the piston rod 7 comprises an adjusting hole formed in the valve cover 4, the adjusting hole is opposite to the end part of the piston rod 7 close to the valve cover 4, and an adjusting groove is correspondingly formed in the end part of the piston rod 7; a plug 13 is arranged in the adjusting hole to seal the adjusting hole. Therefore, the piston rod 7 can be conveniently adjusted, and the position of the piston disc 9 on the piston rod 7 is changed, so that the initial deformation of the pressure regulating spring 10 is changed, and the air outlet pressure of the pressure reducing valve part in the combined valve is changed from constant to adjustable.

A groove 11 is formed in the position, opposite to the piston disc 9, of the valve cover 4, and the groove 11 is communicated with the low-pressure air outlet channel 5; one end of the piston rod 7 close to the valve cover 4 extends into the groove 11, and the groove 11 is communicated with the air passage 12. One end of the piston rod 7 close to the high-pressure air outlet end is provided with a pressure reducing valve disc 8, the piston rod 7 is rotatably connected with the pressure reducing valve disc 8, one end of the pressure reducing valve disc 8 close to the high-pressure air outlet end is provided with a sealing gasket 17, and the sealing gasket 17 can be attached to the high-pressure air outlet end and seal the high-pressure air outlet end. The combined valve body 1 is provided with a limit groove 3 corresponding to the piston rod 7, and the high-pressure air outlet end is positioned at the inner end of the limit groove 3; a limit nut 15 is arranged in the limit groove 3, and one end of the piston rod 7 close to the combined valve body 1 penetrates through the limit nut 15 and is connected with the same in a sliding fit manner; when the piston rod 7 seals the high-pressure air outlet end under the action of the pressure regulating spring 10, the end surface of the limiting nut 15 close to the valve cover 4 is attached to the end surface of the piston disc 9 close to the combined valve body 1. A gap is formed between the end face of the limit nut 15 far away from the valve cover 4 and the inner end of the limit groove 3, and the part of the piston rod 7 extending into the gap forms an air inlet section; a gap is formed between the air inlet section and the limiting groove 3, a plurality of air inlets 16 are formed in the side wall of the air inlet section, and the air inlets 16 are distributed along the circumferential direction of the air inlet section; one end of the air inlet hole 16 is communicated with the gap between the air inlet section and the limiting groove 3, and the other end is communicated with the air passage 12. The limit nut 15 limits the stroke of the piston disc 9, the valve disc 8 of the pressure reducing valve at the end part of the piston rod 7 can be well protected, the piston rod 7 is prevented from generating larger pressure on the sealing gasket 17 under the action of the pressure regulating spring 10, and the service life is prolonged.

Through setting up air flue 12 in piston rod 7 to set up inlet port 16 on the piston rod 7 lateral wall, the gas after the decompression gets into the clearance between piston dish 9 and valve gap 4 through this inlet port 16 and air flue 12, thereby better produce the reaction force to piston dish 9, this reaction force and pressure regulating spring 10 combined action are with the pressure of balanced high-pressure gas to relief pressure valve disc 8, make high-pressure gas can reduce the pressure to setting for the low pressure according to setting for, make the structure compacter, small and exquisite.

The stop valve adjusting mechanism comprises a valve rod 18 connected with the stop valve disc 6, a hand wheel 19 is movably arranged at one end, far away from the stop valve disc 6, of the valve rod 18, the hand wheel 19 is rotated to drive the valve rod 18 to move, and the stop valve disc 6 is pushed to close an air inlet channel. By combining the stop valve with the pressure reducing valve, the combination valve is compact in structure and smaller in weight. The specific structure of the stop valve adjusting mechanism is relatively mature, which is the prior art and will not be described in detail herein.

Specifically, the combination valve comprises a combination valve body 1, the lower part of the combination valve body 1 is a high-pressure air inlet end, high-pressure air enters a pressure reducing valve cavity on the upper part through a stop valve disc 6, the air after being reduced by a pressure reducing valve disc 8 enters an air channel 12 in a piston rod 7, the piston rod 7 can move up and down in the pressure reducing valve cavity, a piston disc 9 is arranged on the piston rod 7 in a threaded connection mode, the piston disc 9 moves axially along the piston rod 7 through adjusting the piston rod 7 to change the elastic force of a pressure regulating spring 10, the constant thrust of the pressure regulating spring 10 is changed into variable spring thrust, and therefore the air outlet pressure of the pressure reducing valve cavity through a low-pressure air outlet channel 5 is changed from constant to adjustable. After the inlet pressure is given, the piston assembly (comprising the piston rod 7 and the piston disc 9) enables the valve port at the high-pressure air outlet end to be opened to a certain height under the elastic force of the pressure regulating spring 10. When high-pressure gas passes through a through flow surface formed by the high-pressure gas outlet corresponding to the valve disc 8 of the pressure reducing valve, the high-pressure gas is reduced in pressure, the reduced gas enters a gap between the valve cover 4 and the piston disc 9 through the middle gas passage 12 of the piston rod 7, namely a low-pressure cavity, low-pressure gas is formed, and rated flow is output through the low-pressure gas outlet channel 5. At the same time, the gas pressure of the low-pressure chamber acts on the piston disc 9, balancing the force of the pressure-regulating spring 10. The pressure reducing valve thus completes the process of reducing the pressure of the high-pressure gas to the low-pressure gas.

When the outlet pressure of the combination valve needs to be adjusted, the relative position of the piston disc 9 and the piston rod 7 can be changed by adjusting the piston rod 7, and the acting force of the pressure adjusting spring 10 during balance is changed. In order to establish a new equilibrium, the height at which the valve port of the pressure reducing valve is opened is changed, the outlet pressure of the pressure reducing valve is changed, and the changed outlet pressure is reacted on the piston disc 9 to form a new equilibrium with the pressure regulating spring 10. And finishing the pressure regulating process of pressure reduction.

The utility model discloses pressure regulating mechanism and piston integrated design, the combination valve appearance is small and exquisite, and light in weight, resistance is little under water. The pressure at the outlet of the combined valve can be adjusted as required, and the range of matching with a respirator is larger; by adjusting the pressure regulating mechanism, the combined valve is more quickly and conveniently debugged, and the outlet of the pressure reducer produced in batch is ensured to be consistent.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and although the applicant has described the present invention in detail with reference to the preferred embodiments, those skilled in the art should understand that those modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, all should be covered in the scope of the claims of the present invention.

Claims

1. A pressure-adjustable stop pressure-reducing combined valve comprises a combined valve body, wherein a high-pressure air inlet channel and a high-pressure air outlet channel are arranged in the combined valve body, the high-pressure air inlet channel penetrates through one end of the combined valve body to form a high-pressure air inlet end, and the high-pressure air outlet channel penetrates through the other end of the combined valve body to form a high-pressure air outlet end; a stop valve cavity is arranged between the high-pressure air inlet channel and the high-pressure air outlet channel, a stop valve disc is arranged in the stop valve cavity and connected with a stop valve adjusting mechanism arranged on the combined valve body, and the stop valve adjusting mechanism can be adjusted to drive the stop valve disc to close the high-pressure air inlet channel;

the valve is characterized in that a valve cover is arranged at the high-pressure air outlet end of the combined valve body, a pressure reducing valve cavity is formed between the valve cover and the combined valve body, a low-pressure air outlet channel is arranged on the valve cover, and the low-pressure air outlet channel is communicated with the pressure reducing valve cavity;

a piston disc is arranged in the pressure reducing valve cavity and is connected with the valve cover in a sliding fit manner; the piston disc is provided with a piston rod, the piston rod penetrates through the end faces of the two ends of the piston disc and is in threaded connection with the piston disc, correspondingly, the valve cover is provided with a piston rod adjusting mechanism, and the piston rod can drive the piston disc to move along the axial direction of the piston rod by rotating the piston rod through the piston rod adjusting mechanism; one end of the piston rod, which is far away from the piston disc, is right opposite to the high-pressure air outlet end, and the high-pressure air outlet end can be sealed; a pressure regulating spring is arranged between the piston disc and the combined valve body, one end of the pressure regulating spring is connected with the combined valve body, the other end of the pressure regulating spring is connected with the piston disc, one end of the piston rod, which is close to the combined valve body, is attached to the high-pressure air outlet end and seals the high-pressure air outlet end under the action of the pressure regulating spring in an initial state, and a gap is formed between the piston disc and the valve cover;

2. The pressure-adjustable stop and pressure-reducing combination valve as claimed in claim 1, wherein the piston rod adjusting mechanism comprises an adjusting hole formed in the valve cover, the adjusting hole is opposite to one end of the piston rod close to the valve cover, and an adjusting groove is correspondingly formed in the end of the piston rod; and a plug is arranged in the adjusting hole to seal the adjusting hole.

3. The pressure-adjustable stop and pressure-reducing combination valve as claimed in claim 1, wherein a groove is formed at a position of the valve cover opposite to the piston disc, and the groove is communicated with the low-pressure outlet channel; one end of the piston rod, which is close to the valve cover, extends into the groove, and the groove is communicated with the air passage.

4. The pressure-adjustable combined shutoff and pressure-reducing valve according to claim 1, wherein a pressure-reducing valve disc is disposed at an end of the piston rod near the high-pressure gas outlet end, the piston rod is rotatably connected to the pressure-reducing valve disc, and a sealing gasket is disposed at an end of the pressure-reducing valve disc near the high-pressure gas outlet end and can be attached to and seal the high-pressure gas outlet end.

5. The pressure-adjustable stop and pressure-reduction combined valve according to claim 1, wherein a limit groove is formed in the combined valve body corresponding to the piston rod, and the high-pressure gas outlet end is located at the inner end of the limit groove; a limit nut is arranged in the limit groove, and one end of the piston rod, which is close to the combined valve body, penetrates through the limit nut and is connected with the limit nut in a sliding fit manner; when the piston rod seals the high-pressure air outlet end under the action of the pressure regulating spring, the end face of the limiting nut, which is close to the valve cover, is attached to the end face of the piston disc, which is close to the combined valve body.

6. A pressure-adjustable combined stop and pressure reduction valve according to claim 5, wherein a gap is formed between the end face of the limiting nut, which is far away from the valve cover, and the inner end of the limiting groove, and the part of the piston rod, which extends into the gap, forms an air inlet section; a gap is formed between the air inlet section and the limiting groove, a plurality of air inlets are formed in the side wall of the air inlet section, and the air inlets are distributed along the circumferential direction of the air inlet section; one end of the air inlet hole is communicated with the gap between the air inlet section and the limiting groove, and the other end of the air inlet hole is communicated with the air passage.

7. The pressure-adjustable combined shutoff and pressure-reducing valve as claimed in claim 1, wherein the shutoff valve adjusting mechanism comprises a valve rod connected to the shutoff valve disk, a hand wheel is movably disposed at an end of the valve rod away from the shutoff valve disk, and the hand wheel is rotated to move the valve rod and push the shutoff valve disk to close the high-pressure air inlet passage.