CN213077265U

CN213077265U - One-way quick connector, connector comprising same and positive pressure air respirator

Info

Publication number: CN213077265U
Application number: CN202020922339.8U
Authority: CN
Inventors: 刘树春; 赵全杰
Original assignee: Jiangsu Changcheng Xiaobao Security Technology Co ltd
Current assignee: Jiangsu Changcheng Xiaobao Security Technology Co ltd
Priority date: 2020-05-27
Filing date: 2020-05-27
Publication date: 2021-04-30
Anticipated expiration: 2030-05-27

Abstract

The utility model discloses an one-way type quick-operation joint, reach connector and positive pressure air respirator that contain this joint belongs to the fire-fighting equipment field. The connector includes: the gas supply device comprises a connecting seat arranged on a medium-pressure pipeline, a gas supply socket connected with gas supply equipment, and a one-way valve body arranged between the connecting seat and the medium-pressure pipeline. The one-way quick connector of the utility model is not connected with an external air source socket, or is in a sealing state when the external air source pressure is slightly less than the air pressure in the medium-pressure pipeline, and the air in the self air bottle can not be leaked; when one-way type quick-operation joint connects external air supply socket, and when external air supply pressure is a bit bigger than the gas pressure of middling pressure pipeline the inside, the air current is in through state, and the gas of external air supply can flow to user's middling pressure pipeline direction, finally flows to respirator, the live time that user self gas cylinder carried the air supply is prolonged.

Description

One-way quick connector, connector comprising same and positive pressure air respirator

Technical Field

The utility model belongs to the fire-fighting equipment field, especially, one-way type quick-operation joint reaches connector and positive pressure air respirator that contain this joint.

Background

At present, a quick connection structure of a positive pressure air respirator for fire fighting is known, in which a quick gas plug and a quick gas socket are a through type quick plug and a closed type quick gas socket respectively, that is, when the plug and the socket are connected, gas flow is in a through state, a side with a high gas pressure value is communicated to a side with a low pressure, a gas source of a high pressure gas cylinder of a common positive pressure air respirator is changed into medium pressure gas with 0.8 to 1.3 atmospheric pressures through decompression, the medium pressure gas cylinder and the socket are connected into a whole through a medium pressure pipeline, the socket belongs to a closed type socket, one side of the plug is connected with a mask and a gas supply valve which need gas supply, the plug belongs to a gas-requiring plug, when the plug is not connected with the socket, that is, the plug and the socket are disconnected, the gas cannot leak because the closed type socket is provided with a closed locking, due to the pressure difference, the air source can flow to the plug through the socket and is finally transmitted to the breathing mask for the user to use.

If the air respirator needs additionally install the second quick plug on the medium-pressure pipeline again, be used for receiving external air supply air feed, for example, user's self gas cylinder air supply is not enough, when needing companion's assistance, can be under the condition of not breaking air feed valve plug and the through type plug of air supply, insert the quick plug of second on the external through type plug of air supply, in order to prolong the live time that self gas cylinder carried the air supply, when the second plug selects for through type plug, when not connecing with the through type plug of external air supply, can leak the gas of self gas cylinder in a large number, lead to the unable air respirator that uses of user. If the closed plug is selected, when the closed plug is not connected with an external air source straight-through plug, gas of a gas cylinder of the plug cannot be leaked, and when the closed plug is connected with an external air source straight-through plug, if the pressure of an external air source is slightly greater than the pressure in a second plug pipeline, the gas of the external air source flows to the direction of a second plug of a user and finally flows to a breathing mask, so that the air respirator is ensured to be used by the user for a long time. If the pressure of the external air source is slightly smaller than the pressure in the second plug pipeline, the air source of the air bottle of the user has the risk of flowing out and leaking to the external air source, so that the service time of the air respirator is influenced.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: to solve the above-mentioned problems involved in the background art, a one-way type quick connector, and a connector and a positive pressure type air respirator including the same are provided.

The technical scheme is as follows: the invention provides a one-way quick coupling, which is arranged on a medium-pressure pipeline and an air pipe connected with the medium-pressure pipeline, and comprises: the connecting seat is hermetically connected with the medium-pressure pipeline or the air pipe and is provided with a through hole on the central axis thereof, and the one-way valve body is arranged inside the medium-pressure pipeline or the air pipe. Specifically, the check valve body includes: the connecting seat comprises a part of medium pressure pipeline which is connected with the connecting seat in a sealing way, an elastic piece which is fixedly arranged in the medium pressure pipeline, and a movable conical valve body which is fixedly connected with the elastic piece and is attached to the through hole of the connecting seat. The connecting seat includes: the cavity is arranged at the through hole at the bottom of the cavity and is positioned on the annular supporting part at the top of the cavity so as to be arranged at the connecting part at the top of the annular supporting part and a plurality of annular barb rings on the outer wall of the connecting part.

As a preferred scheme, the check valve body is a conical valve body, and the conical valve body takes the through hole of the connecting seat as an initial position and can move along the medium-pressure pipeline for a preset distance.

As a preferable scheme, the shape of the conical valve body is a truncated cone, a combination of a cylinder and a truncated cone, or a combination of a cylinder and a cone. The conical valve body is manufactured by adopting an integral forming process, the outer diameter of the top of the conical valve body is smaller than the inner diameter of the through hole, and the outer diameter of the bottom of the conical valve body is larger than the inner diameter of the through hole.

Preferably, when the conical valve body is located at the initial position, the conical valve body and the connecting seat through hole are in a sealing state. The conical valve body is made of flexible materials, such as rubber materials.

The present invention also provides a one-way type quick connector, comprising: the air supply device comprises a connecting seat, an air supply socket and a one-way valve body, wherein the connecting seat is hermetically connected with a medium-pressure pipeline or an air pipe and is provided with a through hole on the central axis; wherein the other end of the connecting seat is detachably connected with the air supply socket. Specifically, the check valve body includes: the connecting seat comprises a part of medium pressure pipeline which is connected with the connecting seat in a sealing way, an elastic piece which is fixedly arranged in the medium pressure pipeline, and a movable conical valve body which is fixedly connected with the elastic piece and is attached to the through hole of the connecting seat. The connecting seat includes: the cavity is arranged at the through hole at the bottom of the cavity and is positioned on the annular supporting part at the top of the cavity so as to be arranged at the connecting part at the top of the annular supporting part and a plurality of annular barb rings on the outer wall of the connecting part.

Preferably, the gas supply socket is a universal socket or a standard socket. Specifically, the gas supply socket includes: the female joint is connected with the top of the connecting seat, the groove is formed in the female joint and matched with the barb ring, and the air supply pipe is fixedly connected with the female joint. When the top of the one-way quick connector is connected with the air supply socket, the O-shaped sealing ring is arranged at the joint of the top of the connecting seat and the air supply socket, and the top of the one-way quick connector is in interference connection with the air supply socket.

The invention also provides a positive pressure type air respirator for fire fighting, which comprises the unidirectional quick connector.

Has the advantages that: the utility model relates to a one-way quick coupling, a connector containing the same and a positive pressure air respirator, when the one-way quick coupling is not connected with an external air source socket or the external air source pressure is slightly less than the air pressure in a medium-pressure pipeline, the conical valve body is positioned at the through hole of a connecting seat and is in a sealing state, and the air of the gas cylinder of the one-way quick coupling can not leak; when one-way type quick-operation joint connects external air supply socket, and when external air supply pressure is a bit bigger than the gas pressure of middling pressure pipeline the inside, promote keeping away from the connecting seat through-hole of toper valve body, the air current is in the through state, and the gas of external air supply can flow to user's middling pressure pipeline direction, and final flow direction respirator guarantees that the user uses for a long time. Simultaneously, adopt the interference to be connected between the top of connecting seat and the air feed socket, on the basis of guaranteeing to seal, realize quick assembly disassembly one-way type and connect and air feed socket. When the gas source of the gas cylinder of the user is insufficient and needs assistance of a companion, the one-way quick connector can be inserted into the external gas source socket without disconnecting the gas supply valve plug and the gas source socket, so that the service time of the gas source carried by the gas cylinder is prolonged.

Drawings

Fig. 1 is a schematic structural view of the one-way quick coupling of the present invention.

Fig. 2 is a schematic structural view of the one-way quick connector of the present invention.

Fig. 3 is a schematic view of the state of the unidirectional quick coupling of the present invention when the air supply socket is not connected.

Fig. 4 is a schematic view of the one-way type quick connector of the present invention in a sealed state.

Fig. 5 is a schematic view of the one-way quick connector of the present invention in an open state.

The reference signs are: the connecting seat 1, the one-way valve body 2, the air supply socket 3, the cavity 11, the through hole 12, the supporting part 13, the connecting part 14, the barb ring 15, the medium pressure pipeline 21, the elastic part 22, the conical valve body 23, the female joint 31, the groove 32, the air supply pipe 33 and the O-shaped sealing ring 34.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

As shown in fig. 1 to 2, a one-way type quick connector includes: the valve comprises a connecting seat 1, a one-way valve body 2 and an air supply socket 3.

Wherein, connecting seat 1 includes: cavity 11, through-hole 12, supporting part 13, connecting part 14, barb ring 15. Wherein the annular support 13 is connected to the medium pressure line 21, the inner flow area of which has a cavity 11; a through hole 12 is arranged at one end of the cavity 11 close to the medium-pressure pipeline 21; the other end of the cavity 11 is connected with a connecting part 14 connected with the top of the annular supporting part 13; a plurality of annular barb rings 15 are provided on the outer wall of the connecting portion 14 for connection with a socket.

The check valve body 2 includes: part of the medium pressure pipeline 21, the elastic element 22 and the conical valve body 23. The middle pressure pipeline 21 is connected with one end of the connecting seat 1 in a sealing manner, one end of the elastic piece 22 is fixedly installed inside the middle pressure pipeline 21, and the other end of the elastic piece is fixedly connected with a conical valve body 23 in a cone-shaped structure. The conical valve body 23 is formed by integrally forming a cylinder and a truncated cone, wherein the outer diameter of the top of the truncated cone is smaller than the inner diameter of the through hole 12, and the outer diameter of the bottom of the truncated cone or the cylinder is larger than the inner diameter of the through hole 12. In a further implementation, the elastic member 22 comprises: the connecting rod is fixedly connected in the air outlet pipe, and the spring is sleeved outside the connecting rod, one end of the spring is fixedly connected with the connecting rod, and the other end of the spring is fixedly connected with the conical valve body 23.

The air supply socket 3 is a universal or standard connecting seat 1, and a special or correspondingly designed socket is not needed. The gas supply socket in this embodiment comprises a female connector 31, a groove 32, a gas supply pipe 33, and an O-ring 34. Wherein, female joint 31 with the connecting seat 1 top is connected female joint 31 inside be provided with barb ring 15 looks adaptation's recess 32, air supply pipe 33 with female joint 31 fixed connection, air supply pipe 33 is connected with air supply equipment. In emergency, other people or other movable air source equipment can be connected to safely and continuously supply and supplement air for the firefighters or rescue and rescue personnel in the severe environment filled with dense smoke, toxic gas, steam or oxygen deficiency. And an O-shaped sealing ring 34 is connected at the joint of the top of the connecting seat 1 and the air supply socket 3 and used for improving the sealing effect.

When the one-way quick connector and the gas supply socket 3 are in a connected state, if the pressure of gas at the end of the gas supply socket 3 is higher than that at the end of the one-way quick connector, the gas flows to the low-pressure side, namely the direction of a medium-pressure pipeline, and if the pressure of the gas at the end of the gas supply socket 3 is lower than that at the end of the one-way quick connector, the one-way valve body 2 locks the gas to avoid gas leakage of the medium-pressure pipeline. If the plug and the socket are disconnected, the one-way valve body 2 automatically closes the passage immediately, so that gas in the medium-pressure pipeline cannot flow out of the passage of the one-way valve body 2.

In a further embodiment, the conical valve body 23 and the barb ring 15 are both made of rubber material. The elasticity of the conical valve body 23 is increased, the air pressure difference between the required external air pressure and the internal air pressure can be reduced, and the sensitivity and the reliability of the one-way valve body 2 are improved. In addition, barb ring 15 is because having the elasticity of rubber, on guaranteeing sealed basis, realizes quick assembly disassembly one-way type and connects and the air feed socket.

In order to facilitate understanding of the technical solution of the one-way type quick connector, the working principle thereof is briefly explained: as shown in the attached figures 3-5, when the one-way quick connector is not connected with an external air source socket, the conical valve body is positioned at the through hole 12, the conical valve body 23 and the connecting seat 1 are in a sealing state, and gas of the gas cylinder cannot be leaked. When the one-way type quick coupling connects external air supply socket 3, and only external air source pressure is a bit bigger than the pressure inside the plug pipeline, pushes away the connecting seat 1 through hole of conical valve body 23, and the air current is in the through state, and the gas of external air source can flow to user's middling pressure pipeline direction, and the final flow is to respirator, guarantees that the user uses for a long time. When the one-way quick connector is connected with the external air supply socket 3, the pressure of an external air source is slightly less than the pressure in a plug pipeline, at the moment, the conical valve body is positioned at the position of the through hole 12, the one-way quick connector is automatically closed, and the air source cannot flow out. Simultaneously, adopt the interference to be connected between the top of connecting seat 1 and air feed socket 3, on the basis of guaranteeing to seal, realize quick assembly disassembly one-way type and connect and air feed socket.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

Claims

1. A one-way type quick coupling, which is installed on a medium-pressure pipe and a gas pipe connected to the medium-pressure pipe, comprising: the connecting seat is hermetically connected with the medium-pressure pipeline or the air pipe and is provided with a through hole on the central axis thereof, and the one-way valve body is arranged inside the medium-pressure pipeline or the air pipe.

2. The one-way type quick coupling according to claim 1, wherein the one-way valve body is a tapered valve body movable a predetermined distance along the medium pressure pipe line with the through hole of the coupling seat as a starting position.

3. The one-way type quick coupling according to claim 2, wherein the shape of the conical valve body is a truncated cone, a combination of a cylinder and a truncated cone, or a combination of a cylinder and a cone; the outer diameter of the top of the conical valve body is smaller than the inner diameter of the through hole, and the outer diameter of the bottom of the conical valve body is larger than the inner diameter of the through hole.

4. The one-way type quick coupling according to claim 2, wherein the conical valve body is in a sealed state with the coupling seat through hole when the conical valve body is in the initial position.

5. A one-way quick connector comprising: the one-way type quick coupling according to any one of claims 1 to 4, wherein the air supply socket is connected to an air supply device, and the other end of the connecting base is detachably connected to the air supply socket.

6. The one-way quick connector of claim 5, wherein the gas supply socket is a universal or standard socket.

7. A positive pressure type air respirator for fire fighting, comprising the one-way type quick connector according to any one of claims 1 to 4.