CN214305429U - Four-loop protection valve integrated with pressure limiting valve - Google Patents

Abstract

The utility model relates to a four return circuit protection valve technical field of commercial car, a four return circuit protection valves of integrated pressure limiting valve is disclosed, including four return circuit protection valve bodies, be equipped with input port and four delivery outlets P21 on the four return circuit protection valve bodies, P22, P23 and P24, P21 and P22 communicate each other, P23 and P24 communicate each other, still be equipped with two delivery outlets of P25 and P26 on the four return circuit protection valve bodies, P25 and P23 communicate, P26 and P24 communicate, be equipped with the pressure limiting mechanism that is used for controlling P23 and P24's output atmospheric pressure size on the four return circuit protection valve bodies. The pressure limiting valve is integrated on the four-loop protection valve body in the application, the air pressure output by the P23 and the P24 is controlled, and the problems of complex structure and inconvenient installation existing in the prior art due to low integration level of the air processing unit are solved.

Description

Four-loop protection valve integrated with pressure limiting valve

Technical Field

The utility model relates to a four return circuit protection valve technical field of commercial car, concretely relates to four return circuit protection valves of integrated pressure limiting valve.

Background

The air treatment unit of the commercial vehicle is a combination of an air dryer and a four-loop protection valve, the air dryer cleans, dries and controls compressed air from an air compressor, and the four-loop protection valve is used for protecting the air pressure of a system, so that the air treatment unit provides air drying control, pressure control and circulation protection functions for the commercial vehicle. The four-loop protection valve is formed by arranging four pressure-limiting check valves according to a certain relation, and other functional mechanisms are added to part of the four-loop protection valves to realize the shunt supply of an air source in the brake system of the commercial vehicle, so that the independent and normal work of each loop can be ensured. In general, the four-circuit protection valve comprises an input port and four output ports P21, P22, P23 and P24 which are simultaneously connected with the input port, when in use, each output port can output compressed gas, for example, P21 and P22 are communicated with a service braking system of a commercial vehicle, P23 is connected with a trailer braking system of the commercial vehicle, and P24 is connected with an air end such as a clutch and an air horn. Meanwhile, an air pipe connected out of the P23 interface is also connected with a manual braking system, so that a driver can realize manual braking by using compressed air output in the P23; and the air pipe connected from the P24 interface is also connected with other air pipes again, so that the compressed air in the P24 reaches the corresponding air using end.

At present, when a commercial vehicle runs, a high-pressure compressed air is conveyed into a four-loop protection valve from an input port by an air compressor, the air pressure of the compressed air entering the four-loop protection valve can reach 12Bar, the compressed air firstly flows into P21 and P22 which are communicated with each other after entering the four-loop protection valve, then part of the compressed air flows into P23 and P24, and the compressed air output from the P23 and P24 is conveyed to gas ends of a clutch, an air horn, an automatic gearbox and the like, so that the air pressure requirement after the P23 and P24 output is not more than 8.5Bar, in the prior art, a pressure limiting mechanism is required to be externally connected to output air pipes of the P23 and P24 of a four-loop protection valve body to control the output air pressure of the four-loop protection valve body, when the pressure limiting mechanism is externally connected, more pipelines are required to be arranged to cause the assistance of the whole air circuit structure, and the cost is higher; more importantly, the external pressure limiting mechanism increases the risk of gas leakage in the gas path, which may cause unstable gas supply to affect the use of the commercial vehicle.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a four return circuit protection valves of integrated pressure limiting valve to there is the problem that the structure is complicated, the installation is inconvenient because the air handling unit integrated level is lower in solving among the prior art commercial car.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a four-circuit protection valve integrated with a pressure limiting valve comprises a four-circuit protection valve body, wherein an input port and four output ports P21, P22, P23 and P24 are arranged on the four-circuit protection valve body, the P21 and the P22 are communicated, the P23 and the P24 are communicated, two output ports P25 and P26 are further arranged on the four-circuit protection valve body, the P25 is communicated with the P23, the P26 is communicated with the P24, and a pressure limiting mechanism used for controlling the output air pressure of the P23 and the P24 is arranged on the four-circuit protection valve body.

The principle of the scheme is as follows: compressed gas entering the four-circuit protection valve body from the input port firstly enters the P21 and P22 interfaces, so that the P21 and the P22 are started firstly, the commercial vehicle obtains driving braking capacity at the moment, then part of the compressed gas passes through the pressure limiting mechanism and then enters the P23 and/or the P24, the pressure limiting mechanism is used for controlling the pressure of the compressed gas entering the P23 and/or the P24, when the pressure of the compressed gas is reduced after passing through the pressure limiting mechanism, and the compressed gas is introduced into the P23, the brake system of the trailer of the commercial vehicle can work, and the compressed gas in the P24 is communicated to the auxiliary gas end; meanwhile, in the application, as the P25 communicated with the P23 and the P26 communicated with the P24 are arranged on the four-circuit protection valve body, after compressed gas is introduced into the P23 and the P24, part of the compressed gas in the P23 can automatically enter the P25, and the P25 is directly connected with the manual braking system by using the gas pipe, so that a driver can operate the manual braking system; part of the compressed gas in the P24 can automatically enter the P26, and the P26 is connected with an automatic transmission of a commercial vehicle by using a gas pipe, so that the control of the automatic transmission is conveniently realized.

The beneficial effect of this scheme is:

1. simple to operate and cost are lower: compared with the prior art, the four-circuit protection valve needs to be externally connected with a pressure limiting mechanism, so that the whole gas circuit structure is complex. The pressure limiting mechanism is directly arranged on the four-loop protection valve in the application, the pressure limiting mechanism is utilized to control the air pressure output by the P23 and the P24, and therefore the pressure limiting mechanism does not need to be connected outside the four-loop protection valve, the whole air circuit structure is simpler, the occupied space is more, the installation is more convenient, and the consumed cost is lower.

2. The gas circuit structure is more stable: in this application, with the direct integration of pressure limiting mechanism on four return circuit protection valve bodies, pressure limiting mechanism and four return circuit protection valve's connection is more stable, is difficult to appear leaking gas scheduling problem. Meanwhile, the P25 and P26 interfaces are directly arranged on the four-loop protection valve in the application, the P25 and P26 interfaces do not influence the original gas path structures of P21, P22, P23 and P24, and the P25 and P26 are directly utilized to respectively split the compressed gas in the P23 and the P24, so that the use of a three-way valve is reduced, the gas path structure is further simplified, the installation difficulty is reduced, and the cost is saved.

Preferably, as an improvement, the pressure limiting mechanism comprises a pressure limiting valve, wherein the air inlet end of the pressure limiting valve is communicated with P21 and P22 at the same time, and the air outlet end of the pressure limiting valve is communicated with P23 and P24 at the same time.

In the scheme, the pressure limiting valve is integrated on the four-loop protection valve body, and the pressure limiting control is directly carried out on the compressed gas entering the P23 and the P24 from the P21 and the P22, so that the pressure of the gas entering the P23 and the P24 reaches the preset value, and the structural complication caused by the subsequent external pressure limiting valve is avoided.

Preferably, as a modification, a one-way valve is detachably connected in the P25.

In this scheme, direct detachable connection check valve in P25, when commercial car is using, if the atmospheric pressure in the P23 reduces the back, because check valve's effect, can avoid the atmospheric pressure size in the P25 to follow and reduce to make the manual braking system of commercial car can control effectively constantly. Simultaneously, owing to integrate the check valve in this scheme this and P25 hookup location to four return circuit protection valves, consequently can avoid the check valve to connect outside four return circuit protection valve bodies and cause the space extravagant to make whole gas circuit structure simpler, easy to assemble and cost are lower.

Preferably, as a modification, a stepped hole is formed in the P25, and the check valve is in threaded connection with the stepped hole.

In the scheme, the one-way valve is in threaded connection with the inner wall of the P25, so that the one-way valve is convenient to mount and convenient to replace when the one-way valve fails; meanwhile, the one-way valve can be stably connected into the P25 to realize the function of one-way flow restriction.

Preferably, as an improvement, a sealing ring is arranged between the check valve and the stepped hole.

In the scheme, the step hole is formed in the P25, the sealing ring is arranged between the one-way valve and the step hole, when the air pressure in the P23 is reduced, the sealing ring can play a good sealing effect, the phenomenon that the air pressure used for the manual braking system in the P25 is reduced due to the fact that the compressed air in the P25 leaks into the P23 is avoided, and the stable operation of the manual braking system is ensured.

Preferably, as a refinement, the input ports, P21, P22, P23, P24, P25, P26 are all located on the same side of the four-circuit protection valve body.

In this scheme, input port, P21, P22, P23, P24, P25, P26 all set up on the same side of four return circuit protection valve bodies, and when connecting element such as corresponding interface access trachea, all tie points all are located same side, connect convenience more and occupation space littleer for air handling unit structure compactness more.

Preferably, as a modification, a one-way valve is also detachably connected in the P26.

In the scheme, the compressed gas output from the P26 is used for an auxiliary circuit with independent circuit requirements, such as the separation of an automatic gearbox and other auxiliary circuits, the separation of an air suspension and other auxiliary circuits and the like, so that a one-way valve is also arranged in the P26 in the scheme to prevent the backflow of the compressed gas.

Preferably, as an improvement, reinforcing ribs are fixedly connected to the peripheries of the side surfaces of the four-circuit protection valve body, wherein the side surfaces of the four-circuit protection valve body are provided with P21, P22, P23, P24, P25 and P26.

In this scheme, through set up the strengthening rib all around the side at four return circuit protection valve bodies, promote the structural strength of four return circuit protection valve bodies, make things convenient for the stable connection of pressure limiting valve and four return circuit protection valve bodies.

Drawings

Fig. 1 is a top view of a four-circuit protection valve integrated with a pressure limiting valve according to an embodiment of the present invention.

Fig. 2 is a cross-sectional view taken along a-a in fig. 1.

Fig. 3 is a cross-sectional view taken along line B-B of fig. 1.

Fig. 4 is a cross-sectional view taken along line C-C of fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the four-circuit protection valve comprises a four-circuit protection valve body 1, an input port 2, a reinforcing rib 3, a valve body 4, a sealing ring 5, a pressure limiting valve 6, a third communicating hole 7, a fourth communicating hole 8, a fifth communicating hole 9 and a sixth communicating hole 10.

The embodiment is basically as shown in the attached figure 1: the utility model provides a four return circuit protection valves of integrated pressure-limiting valve, including four return circuit protection valve body 1, be equipped with input port 2 on the left side wall of four return circuit protection valve body 1, the top of four return circuit protection valve body 1 is equipped with four delivery outlets P21, P22, P23 and P24, compressed gas enters into four return circuit protection valve body 1 from input port 2 in, and can be by P21, P22, P23 and P24 output compressed gas, integrated into one piece has annular closed strengthening rib 3 around the top surface of four return circuit protection valve body 1, make four return circuit protection valve body 1's structure more stable.

With reference to fig. 1 and 2, the top end of the four-circuit protection valve body 1 is also provided with two output ports P25 and P26, and P21, P22, P23, P24, P25 and P26 are all vertically arranged in parallel; the P25 and the P26 can be detachably connected with one-way valves, and the specific connection mode of the one-way valves is described by taking the one-way valve arranged in the P26 as an example. As shown in fig. 4, the check valve includes a valve body 4 and a one-way flow-limiting component connected to the valve body 4, a stepped hole with a large top and a small bottom is arranged in P25, an internal thread is arranged on the inner wall of the large diameter section in the stepped hole, correspondingly, an external thread matched with the internal thread is arranged on the outer wall of the valve body 4, and a sealing ring 5 is arranged at the bottom end of the large diameter section in the stepped hole.

As shown in fig. 1, a pressure limiting mechanism for controlling the output air pressure of P23 and P24 is detachably connected to the four-circuit protection valve body 1, in this embodiment, the pressure limiting mechanism includes a pressure limiting valve 6 fixedly connected to the front side wall of the four-circuit protection valve body 1 by screws, the air inlet end of the pressure limiting valve 6 is simultaneously communicated with P21 and P22, and the air outlet end of the pressure limiting valve 6 is simultaneously communicated with P23 and P24. In order to clearly show the connection structure between the pressure limiting valve 6 and the P21, the P22, the P23 and the P24, the present embodiment takes the connection between the P21, the P23 and the pressure limiting valve 6 as an example, since the P22 is communicated with the P21 and the P24 is communicated with the P23, after the pressure limiting valve 6 is connected with the P21 and the P23, the pressure limiting valve 6 is considered to be also connected with the P22 and the P24, and the description thereof is omitted.

As shown in fig. 2, a third communication hole 7 communicated with P21 and a fourth communication hole 8 communicated with P23 are formed in the four-circuit protection valve body 1, and with reference to fig. 3, a fifth communication hole 9 communicated with the third communication hole 7 is formed in the left side wall of the four-circuit protection valve body 1, and the left end of the fifth communication hole 9 is communicated with the air inlet end of the pressure limiting valve 6; referring to fig. 4, a sixth communication hole 10 communicated with the fourth communication hole 8 is formed in the left side wall of the four-circuit protection valve body 1, and the left end of the sixth communication hole 10 is communicated with the air outlet end of the pressure limiting valve 6.

The specific implementation mode is as follows:

the compressed gas enters the four-circuit protection valve body 1 from the input port 2, the compressed gas entering the four-circuit protection valve body 1 firstly enters the P21 and the P22, part of the compressed gas in the P21 and part of the compressed gas in the P22 are delivered to a service brake system of a commercial vehicle, and the other part of the compressed gas in the P21 and the other part of the compressed gas in the P22 enter the pressure limiting valve 6 through the third communication hole 7, the compressed gas entering the pressure limiting valve 6 finally enters the sixth communication hole 10 from the gas outlet end of the pressure limiting valve 6, then enters the fourth communication hole 8 through the sixth communication hole 10, and finally enters the P23 and the P24 through the fourth communication hole 8, and the gas output pressures of the P23 and the P24 are smaller than the gas output pressures of the P21 and the P22 because the compressed gas output from the P23 and the P24 passes through the pressure limiting action of the pressure limiting valve 6.

When the compressed gas passing through the pressure limiting valve 6 enters P23 and P24, part of the compressed gas in P23 is delivered to a trailer brake system, and P24 is connected with gas using ends such as a clutch and a gas horn; meanwhile, the check valves in the P25 and the P26 are opened under the action of the pressure of the compressed gas, so that part of the compressed gas in the P23 enters the P25, part of the compressed gas in the P24 enters the P26, the compressed gas entering the P25 through the P23 and P25 internal check valves is conveyed to a manual braking system, and the compressed gas entering the P26 through the P24 and P26 internal check valves is conveyed to an automatic gearbox, so that the control of the automatic gearbox is realized. In the use process of the commercial vehicle, after the gas supply of the P21 is cut off, the air pressure in the P21 is reduced, so that the air pressure in the P23 is reduced along with the air pressure, and at the moment, because the one-way valve is arranged in the P25, the air pressure in the P25 can be kept in a high state, so that the manual brake system of the commercial vehicle can normally work; similarly, when the air pressure in P24 is reduced, the air pressure in P26 is also maintained due to the one-way valve in P26, so as to achieve corresponding control, which is not described in detail herein.

The above description is only an example of the present invention, and the detailed technical solutions and/or characteristics known in the solutions are not described too much here. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims (8)

1. The four-circuit protection valve of the integrated pressure limiting valve comprises a four-circuit protection valve body, wherein an input port and four output ports P21, P22, P23 and P24 are arranged on the four-circuit protection valve body, the P21 and the P22 are communicated with each other, and the P23 and the P24 are communicated with each other, and the four-circuit protection valve is characterized in that: the four-loop protection valve body is also provided with two output ports P25 and P26, the P25 is communicated with the P23, the P26 is communicated with the P24, and the four-loop protection valve body is provided with a pressure limiting mechanism for controlling the output air pressure of the P23 and the P24.

2. A four-circuit protection valve integrated with a pressure limiting valve according to claim 1, characterized in that: the pressure limiting mechanism comprises a pressure limiting valve, the air inlet end of the pressure limiting valve is simultaneously communicated with P21 and P22, and the air outlet end of the pressure limiting valve is simultaneously communicated with P23 and P24.

3. A four-circuit protection valve integrated with a pressure limiting valve according to claim 2, characterized in that: a one-way valve is detachably connected in the P25.

4. A four-circuit protection valve integrated pressure limiting valve according to claim 3, characterized in that: a step hole is formed in the P25, and the one-way valve is in threaded connection with the step hole.

5. The four-circuit protection valve of an integrated pressure limiting valve of claim 4, wherein: and a sealing ring is arranged between the one-way valve and the stepped hole.

6. The four-circuit protection valve of an integrated pressure limiting valve of claim 5, wherein: the input ports, P21, P22, P23, P24, P25 and P26 are all located on the same side of the four-circuit protection valve body.

7. The four-circuit protection valve of an integrated pressure limiting valve of claim 6, wherein: a one-way valve is also detachably connected in the P26.

8. The four-circuit protection valve integrated pressure limiting valve according to any one of claims 1 to 7, wherein: reinforcing ribs are fixedly connected to the periphery of the side face of the four-loop protection valve body, wherein the side face of the four-loop protection valve body is provided with P21, P22, P23, P24, P25 and P26.

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