Trailer control valve and vehicle braking system

Abstract

The invention provides a trailer control valve and a vehicle braking system, the trailer control valve comprises a shell, an exhaust channel, a breathing channel and a waterproof ventilation valve, and the shell is internally provided with a valve body cavity and a control unit cavity; the exhaust channel is arranged in the shell. The valve body cavity communicates with the external environment through the exhaust channel. The breathing channel is arranged in the shell, and the control unit cavity is communicated with the exhaust channel through the breathing channel; the waterproof ventilation valve is arranged in the shell, communicates with the breathing channel and is used for preventing liquid from passing through and allowing gas to pass through. According to the trailer air pressure braking system, the waterproof ventilation valve is arranged, only air can pass through the waterproof ventilation valve, liquid cannot pass through the waterproof ventilation valve, and therefore water can be prevented from entering the control unit cavity from the breathing channel, it is guaranteed that the electronic control unit is prevented from being damaged in the vehicle wading state, and the trailer air pressure braking system operates normally.

Description

Technical Field

[0001] The present application relates to vehicle manufacturing technology, and in particular to a trailer control valve and a vehicle braking system. Background Art

[0002] The trailer pneumatic brake system is a brake system that uses compressed air as a brake source. It is mainly used in commercial vehicles, especially in vehicle combinations of trailers and trailers (trailer / trailer combinations). The trailer pneumatic brake system is connected to the pneumatic brake system on the trailer through the trailer control valve. The trailer control valve can ensure that the brake signal and air pressure can be accurately and timely transmitted and executed between the trailer and the trailer to control the braking and release of the trailer and ensure the coordinated operation of the trailer and the trailer.

[0003] In the solutions of the related technology, a control unit cavity is generally integrated in the trailer control valve, and an electronic control unit (Electronic Control Unit; ECU for short) is arranged in the control unit cavity. A breathing channel is arranged between the control unit cavity and the exhaust channel of the trailer control valve. The control unit cavity can be connected with the external environment through the breathing channel, thereby ensuring that the electronic control unit works under normal pressure.

[0004] However, when the vehicle wades through water, water may enter the control unit cavity through the exhaust channel and the breathing channel, thereby damaging the electronic control unit and causing a malfunction in the trailer's pneumatic brake system. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the related art, the purpose of the present application is to provide a trailer control valve and a vehicle braking system. The present application sets a waterproof and breathable valve, which can only pass gas but not liquid, thereby preventing water from entering the control unit cavity from the breathing channel, ensuring that the electronic control unit is protected from damage when the vehicle is wading, and allowing the trailer pneumatic braking system to operate normally.

[0006] In one aspect, the present application provides a trailer control valve, comprising:

[0007] A housing, wherein a valve body cavity and a control unit cavity are provided in the housing;

[0008] An exhaust passage, wherein the exhaust passage is disposed in the housing, and the valve body cavity is connected to the external environment through the exhaust passage;

[0009] A breathing channel, wherein the breathing channel is arranged in the housing, and the control unit cavity and the exhaust channel are connected through the breathing channel;

[0010] A waterproof breathable valve is arranged in the shell and is connected to the breathing passage. The waterproof breathable valve is used to prevent liquid from passing through and allow gas to pass through.

[0011] In a possible implementation, an energy reduction valve is further provided in the breathing passage, and the energy reduction valve is used to reduce the pressure of the gas entering the waterproof breathable valve.

[0012] In a possible implementation, the energy reduction valve includes at least one energy reduction valve core, the energy reduction valve core is in contact with the inner wall of the breathing passage, and at least one flow guide port is provided on the energy reduction valve core.

[0013] In a possible implementation, the energy reduction valve core includes a body and at least two spoilers, the spoiler is connected to the body, and the guide port is located between two adjacent spoilers.

[0014] In a possible implementation, a plurality of the energy reduction valves are provided in the breathing channel, and the plurality of the energy reduction valves include adjacent first and second energy reduction valves. In a plane perpendicular to the axial direction of the breathing channel, the projection of the guide port of the first energy reduction valve is located within the projection range of the baffle of the second energy reduction valve.

[0015] In a possible implementation, the energy reduction valve core is provided with a plurality of the guide ports, and the plurality of the guide ports are arranged at intervals along the circumference of the energy reduction valve core.

[0016] In a possible implementation, a vent hole is further provided on the body.

[0017] In a possible implementation manner, the energy reduction valve core is in a frustum shape, and a diameter of the energy reduction valve core gradually decreases from the control unit cavity toward the exhaust channel side.

[0018] In a possible implementation, the energy reduction valve further includes a valve housing, the energy reduction valve core is detachably disposed in the valve housing, and the valve housing is interference-connected with an inner wall of the breathing passage.

[0019] In a possible implementation, a plurality of first slots are provided in the valve housing, a plurality of first clips are provided on the energy reduction valve core, the plurality of first slots correspond one-to-one to the plurality of first clips, and the energy reduction valve core is detachably connected to the plurality of first slots in the valve housing through the plurality of first clips.

[0020] In a possible implementation, a plurality of energy reduction valves are provided in the breathing channel, and the plurality of energy reduction valves include adjacent first energy reduction valves and second energy reduction valves, and the first energy reduction valve and the second energy reduction valve are detachably connected;

[0021] A connecting portion is also provided on the valve housing of the first energy reduction valve, and a diameter of the connecting portion is larger than a diameter of the valve housing of the first energy reduction valve. A plurality of second clips are provided on the connecting portion, and a plurality of second clips are provided on the valve housing of the second energy reduction valve. The plurality of second clips correspond one to one to the plurality of second clips, and the first energy reduction valve is detachably connected to the plurality of second clips of the second energy reduction valve via the plurality of second clips.

[0022] In a possible implementation, the control unit cavity is provided with an exhaust port, the waterproof breathable valve is arranged in the exhaust port, and the breathing channel is connected to the exhaust port;

[0023] The waterproof breathable valve comprises a waterproof breathable membrane, which shields the exhaust port and is used to prevent liquid from passing through and allow gas to pass through.

[0024] On the other hand, the present application provides a vehicle braking system, including a trailer pneumatic braking system and a trailer pneumatic braking system, wherein the trailer pneumatic braking system is connected to the trailer pneumatic braking system via any of the trailer control valves described above.

[0025] The present application provides a trailer control valve and a vehicle brake system, the trailer control valve includes a housing, an exhaust channel, a breathing channel and a waterproof breathable valve, the housing is provided with a valve body cavity and a control unit cavity; the exhaust channel is arranged in the housing, and the valve body cavity is connected to the external environment through the exhaust channel; the breathing channel is arranged in the housing, and the control unit cavity and the exhaust channel are connected through the breathing channel; the waterproof breathable valve is arranged in the housing and is connected to the breathing channel, and the waterproof breathable valve is used to prevent liquid from passing through and allow gas to pass through. The present application sets a waterproof breathable valve, which can only pass gas but not liquid, thereby preventing water from entering the control unit cavity from the breathing channel, ensuring that the electronic control unit is protected from damage when the vehicle is in a wading state, so that the trailer pneumatic brake system can operate normally. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 A simplified structural diagram of a trailer control valve provided in one embodiment of the present application;

[0028] Figure 2 for Figure 1 A partial enlarged view of the middle A part;

[0029] Figure 3 A simplified structural diagram of an energy reduction valve provided in one embodiment of the present application;

[0030] Figure 4 A simplified structural diagram of an energy reduction valve core provided in one embodiment of the present application;

[0031] Figure 5 A simplified structural diagram of a valve housing provided in one embodiment of the present application;

[0032] Figure 6 A simplified diagram of the connection structure of multiple energy reduction valves provided in one embodiment of the present application;

[0033] Figure 7 A simplified diagram of the connection structure of multiple energy reduction valves provided in another embodiment of the present application.

[0034] Reference numerals:

[0035] 10- housing;

[0036] 100-valve body cavity;

[0037] 200-control unit cavity; 201-electronic control unit; 210-exhaust port;

[0038] 300-exhaust channel; 310-muffler;

[0039] 400-Respiratory channel;

[0040] 500-waterproof breathable valve; 510-waterproof breathable membrane;

[0041] 600-energy reduction valve; 601-first energy reduction valve; 602-second energy reduction valve; 603-third energy reduction valve; 604-fourth energy reduction valve; 610-energy reduction valve core; 602-second energy reduction valve; 611-flow guide port; 612-body; 613-baffle; 614-vent; 615-first clip; 620-valve housing; 621-first clip slot; 622-second clip; 630-connecting part; 631-second clip slot. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0043] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0044] As described in the background technology, in the related art solution, when the vehicle wades, water may enter the control unit cavity through the exhaust channel and the breathing channel of the trailer control valve, thereby damaging the electronic control unit and causing the trailer pneumatic brake system to malfunction.

[0045] In view of this, the embodiments of the present application aim to provide a trailer control valve and a vehicle braking system. By setting a waterproof and breathable valve connected to the breathing channel, the waterproof and breathable valve can only pass gas but not liquid, thereby preventing water from entering the control unit cavity from the breathing channel, ensuring that the electronic control unit is protected from damage when the vehicle is wading, and allowing the trailer pneumatic braking system to operate normally.

[0046] The contents of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0047] Figure 1 The cross-sectional structure of the trailer control valve of this embodiment is shown; Figure 2 Shows Figure 1 The partial enlarged structure of the middle A part. Please refer to Figure 1-Figure 2 , this embodiment provides a trailer control valve, including:

[0048] The housing 10 includes a valve body cavity 100 and a control unit cavity 200. For example, the housing 10 may be in a regular shape such as a prism or a cylinder, or in an irregular shape, and may be specifically configured as required. The specific positions of the valve body cavity 100 and the control unit cavity 200 in the housing 10 may also be determined as required; wherein, a main valve body is disposed in the valve body cavity 100, and an electronic control unit 201 is disposed in the control unit cavity 200, and the electronic control unit 201 is communicatively connected with the main valve body to control the suction and exhaust actions of the main valve body, so as to transfer brake gas between the trailer air pressure brake system and the trailer air pressure brake system.

[0049] The exhaust channel 300 is disposed in the housing 10, and the valve body cavity 100 is connected to the external environment through the exhaust channel 300. It can be understood that the exhaust channel 300 is a channel for the main valve body in the valve body cavity 100 to exhaust gas, and is used to discharge excess gas in the main valve body to the external environment. During the exhaust process, the gas pressure in the exhaust channel 300 is relatively high. In order to reduce the noise during exhaust, a muffler 310 can be provided in the exhaust channel 300.

[0050] The breathing channel 400 is disposed in the housing 10, and the control unit cavity 200 is connected to the exhaust channel 300 through the breathing channel 400. The breathing channel 400 can discharge the excess gas in the control unit cavity 200 to the external environment through the exhaust channel 300, ensuring that the control unit cavity 200 is maintained at a normal pressure state to ensure the normal operation of the electronic control unit 201.

[0051] The waterproof breathable valve 500 is arranged in the housing 10 and is connected to the breathing passage 400. The waterproof breathable valve 500 is used to prevent liquid from passing through and allow gas to pass through. The specific setting position of the waterproof breathable valve 500 can be determined as needed. For example, it can be set inside the breathing passage 400; or, it can be set at one end of the breathing passage 400. Based on the above characteristics of the waterproof breathable valve 500, when the vehicle wades, water enters the breathing passage 400 from the exhaust passage 300 and is then blocked by the waterproof breathable valve 500, thereby preventing water from entering the control unit cavity 200, protecting the electronic control unit 201 from damage, and allowing the trailer pneumatic brake system to operate normally.

[0052] It can be seen from the above description that in this embodiment, a waterproof breathable valve 500 is provided, which can only pass gas but not liquid, thereby preventing water from entering the control unit cavity 200 from the breathing channel 400, ensuring that the electronic control unit 201 is protected from damage when the vehicle is in the wading state, so that the trailer pneumatic brake system can operate normally.

[0053] Since the gas pressure generated in the exhaust channel 300 during the exhaust process of the main valve body is relatively high, in order to avoid damage to the waterproof breathable membrane 510 in the waterproof breathable valve 500, an energy reduction valve 600 is also provided in the breathing channel 400 of this embodiment. The energy reduction valve 600 is used to reduce the gas pressure entering the waterproof breathable valve 500.

[0054] Figure 3 The structure of the energy reduction valve of this embodiment is shown; Figure 4 The structure of the energy-reducing valve core of this embodiment is shown; Figure 5 The structure of the valve housing of this embodiment is shown. Figure 3-Figure 5The energy reduction valve 600 of this embodiment includes at least one energy reduction valve core 610, and the energy reduction valve core 610 abuts against the inner wall of the breathing channel 400; illustratively, the energy reduction valve core 610 can directly abut against the breathing channel 400; or, the energy reduction valve core 610 can be arranged in other parts, and the abutment with the inner wall of the breathing channel 400 is achieved through other parts. At least one guide port 611 is arranged on the energy reduction valve core 610, and the energy reduction valve core 610 can shield part of the breathing channel 400, so that the gas can only flow into the subsequent waterproof breathable valve 500 through the guide port 611. In this way, the high-pressure gas discharged from the main valve body is blocked by the energy reduction valve core 610, and its pressure and speed are reduced, thereby reducing the impact on the waterproof breathable valve 500, which is conducive to extending the service life of the waterproof breathable valve 500.

[0055] Please continue to refer to Figure 4 The energy reduction valve core 610 of this embodiment includes a body 612 and at least two baffles 613, and the baffles 613 are connected to the body 612. For example, the baffles 613 can be integrally formed with the body 612. The guide port 611 is located between two adjacent baffles 613. Figure 4 It can be seen that the guide port 611 of this embodiment extends to the end of the energy reduction valve core 610 .

[0056] It can be understood that, in some embodiments, a plurality of energy reduction valve cores 610 can be simultaneously disposed in the valve housing 620 of the present embodiment, thereby improving the effect of reducing gas pressure and velocity.

[0057] In addition, a plurality of energy reduction valves 600 may be provided in the breathing channel 400 to enhance the effect of reducing gas pressure and velocity.

[0058] Figure 6 The connection structure of two energy reduction valves is shown. Please continue to refer to Figure 6 In a possible implementation, two energy reduction valves 600 are provided in the breathing channel 400 of this embodiment, and the two energy reduction valves 600 include a first energy reduction valve 601 and a second energy reduction valve 602 adjacent to each other. It can be understood that the above-mentioned "first" and "second" are only used to distinguish the two energy reduction valves 600, and the structures of the two can be completely the same. In a plane perpendicular to the axial direction of the breathing channel 400, the projection of the guide port 611 of the first energy reduction valve 601 is located within the projection range of the baffle 613 of the second energy reduction valve 602, so as to ensure that the guide port 611 of the first energy reduction valve 601 is directly opposite to the baffle 613 of the second energy reduction valve 602.

[0059] When in use, when the high-pressure gas discharged from the main valve body acts on the first energy reduction valve 601, it will be blocked by the baffle 613 of the first energy reduction valve 601. After the pressure and speed of the gas are reduced, it continues to flow to the baffle 613 of the second energy reduction valve 602 through the guide port 611 of the first energy reduction valve 601. The baffle 613 of the second energy reduction valve 602 further reduces the pressure and speed of the gas and then flows to the waterproof breathable valve 500 through the guide port 611 of the second energy reduction valve 602. Compared with a single energy reduction valve 600, this embodiment can further reduce the pressure and speed of the gas flowing from the main valve body to the waterproof breathable valve 500, thereby further reducing the impact on the waterproof breathable valve 500, which is conducive to extending the service life of the waterproof breathable valve 500.

[0060] Figure 7 The connection structure of four energy reduction valves is shown. Please continue to refer to Figure 7 In another possible implementation, four energy reduction valves 600 are provided in the breathing channel 400 of this embodiment, and the four energy reduction valves 600 include a first energy reduction valve 601, a second energy reduction valve 602, a third energy reduction valve 603 and a fourth energy reduction valve 604 connected in sequence. It can be understood that the above-mentioned "first", "second", "third" and "fourth" are only used to distinguish the four energy reduction valves 600, and the structures of the four can be exactly the same. The guide ports 611 and the baffles 613 in the four energy reduction valves 600 are staggeredly distributed along the circumferential direction with the axis of the breathing channel 400 as the center; that is, the projection of the guide port 611 of the first energy reduction valve 601 is located within the projection range of the baffle 613 of the second energy reduction valve 602, the projection of the guide port 611 of the second energy reduction valve 602 is located within the projection range of the baffle 613 of the third energy reduction valve 603, and the projection of the guide port 611 of the third energy reduction valve 603 is located within the projection range of the baffle 613 of the fourth energy reduction valve 604.

[0061] It can be understood that, compared with the solution of two energy reduction valves 600, this embodiment can further reduce the pressure and speed of the gas flowing from the main valve body to the waterproof breathable valve 500, thereby further reducing the impact on the waterproof breathable valve 500, which is beneficial to extending the service life of the waterproof breathable valve 500.

[0062] It should be noted that the number of energy reduction valves 600 in the breathing channel 400 in this embodiment can be set as needed, for example, 3, 5, 6, etc. In addition, when the breathing channel 400 is curved, the valve housing 620 of the energy reduction valve 600 can also be curved to match the breathing channel 400.

[0063] Optionally, the energy reduction valve core 610 of this embodiment is provided with a plurality of guide ports 611, for example, 2-6 guide ports 611 may be provided; the plurality of guide ports 611 are arranged at intervals along the circumference of the energy reduction valve core 610, for example, the plurality of guide ports 611 may be arranged at equal intervals on the circumference of the energy reduction valve core 610. The specific number and size of the guide ports 611 may be set according to actual needs.

[0064] In some implementations, the main body 612 of this embodiment is further provided with a vent hole 614 , which can increase the speed at which gas passes through the energy reduction valve core 610 , thereby facilitating rapid discharge of excess gas in the control unit cavity 200 .

[0065] Please continue to refer to Figure 2-Figure 4 The energy reduction valve core 610 of this embodiment is in a frustum shape, and the diameter of the energy reduction valve core 610 gradually decreases from the control unit chamber 200 to the exhaust channel 300. Through the above structure, the energy reduction valve core 610 can improve the pressure and speed reduction effect of the gas flowing from the exhaust channel 300 to the control unit chamber 200, and reduce the pressure and speed reduction effect of the gas flowing from the control unit chamber 200 to the exhaust channel 300.

[0066] Please continue to refer to Figure 4 and Figure 5 The energy reduction valve 600 of this embodiment further includes a valve housing 620 , in which the energy reduction valve core 610 is detachably disposed, and the valve housing 620 is interference-connected with the inner wall of the breathing passage 400 .

[0067] For example, the energy reduction valve core 610 of this embodiment can be snap-connected with the valve housing 620. Specifically, a plurality of first snap grooves 621 are provided in the valve housing 620, and a plurality of first snap buckles 615 are provided on the energy reduction valve core 610. The plurality of first snap grooves 621 correspond to the plurality of first snap buckles 615 one by one, and the energy reduction valve core 610 is detachably connected to the plurality of first snap grooves 621 in the valve housing 620 through the plurality of first snap buckles 615. When the snap-connection method is adopted, the energy reduction valve core 610 and the valve housing 620 can be made of plastic material.

[0068] Alternatively, the energy reduction valve core 610 of this embodiment may be threadedly connected to the valve housing 620. Specifically, the valve housing 620 may be provided with an internal thread, and the energy reduction valve core 610 may be provided with a corresponding external thread, and the energy reduction valve core 610 is detachably connected to the internal thread in the valve housing 620 through the external thread. When the threaded connection is adopted, the energy reduction valve core 610 and the valve housing 620 may be made of metal material to improve the connection stability and service life thereof.

[0069] In this embodiment, two adjacent energy reduction valves 600 are detachably connected, thereby facilitating installation and subsequent replacement.

[0070] For example, two adjacent energy reduction valves 600 of this embodiment can be connected by snapping. Figure 5 and Figure 6 Specifically, a connecting portion 630 is further provided on the valve housing 620 of the first energy reduction valve 601. The connecting portion 630 can be arranged at the first end of the valve housing 620, and the connecting portion 630 can be integrally formed with the valve housing 620; the diameter of the connecting portion 630 is larger than the diameter of the valve housing 620, and a plurality of second clamping grooves 631 are provided on the connecting portion 630. A plurality of second clamping buckles 622 are provided on the valve housing 620 of the second energy reduction valve 602, and the plurality of second clamping buckles 622 can be arranged near the second end of the valve housing 620, and the plurality of second clamping grooves 631 correspond to the plurality of second clamping buckles 622 one by one. The first energy reduction valve 601 is detachably connected to the plurality of second clamping grooves 631 of the second energy reduction valve 602 through the plurality of second clamping buckles 622.

[0071] Alternatively, the two adjacent energy reduction valves 600 of this embodiment may also be threadedly connected. Specifically, an internal thread may be provided in the connection portion 630, and an external thread may be provided at the second end of the valve housing 620, so that the two adjacent energy reduction valves 600 are detachably connected to the internal thread through the external thread to achieve threaded connection.

[0072] Please continue to refer to Figure 2 In this embodiment, the control unit cavity 200 is provided with an exhaust port 210, the waterproof breathable valve 500 is arranged in the exhaust port 210, and the breathing channel 400 is connected to the exhaust port 210. Excess gas in the control unit cavity 200 can enter the breathing channel 400 through the exhaust port 210, and be discharged into the external environment through the exhaust channel 300. In this embodiment, the exhaust port 210 and the control unit cavity 200 can be integrally formed. The waterproof breathable valve 500 can be arranged in the exhaust port 210 by means of interference fit; or, it can be connected to the exhaust port 210 by means of threaded connection. The breathing channel 400 and the waterproof breathable valve 500 can be connected as a whole by means of threaded connection.

[0073] The waterproof breathable valve 500 of this embodiment includes a waterproof breathable membrane 510, which covers the exhaust port 210. The waterproof breathable membrane 510 is made of a polymer microporous waterproof material, such as expanded polytetrafluoroethylene material. This material has a special fibrous microporous structure, high mechanical properties and a small pore size, so it has the dual characteristics of being waterproof and breathable, and can be used to prevent liquid from passing through and allow gas to pass through.

[0074] This embodiment also provides a vehicle braking system, including a trailer pneumatic braking system and a trailer pneumatic braking system, wherein the trailer pneumatic braking system is connected to the trailer pneumatic braking system via the trailer control valve.

[0075] Specifically, the trailer control valve can ensure that the brake signal and air pressure can be accurately and timely transmitted and executed between the trailer air pressure brake system and the trailer air pressure brake system to control the braking and release of the trailer and ensure the coordinated operation of the trailer and the trailer. Due to the use of the above trailer control valve, when the vehicle of this embodiment wades through water, water can be prevented from entering the control unit cavity of the trailer control valve, ensuring that the electronic control unit is not damaged, so that the vehicle braking system can operate normally.

[0076] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0077] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0078] It should be noted that in the description of this application, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0079] The various embodiments or implementation methods in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0080] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A trailer control valve, It is characterized in that include: A housing, wherein a valve body cavity and a control unit cavity are provided in the housing; An exhaust passage, wherein the exhaust passage is disposed in the housing, and the valve body cavity is connected to the external environment through the exhaust passage; A breathing channel, wherein the breathing channel is arranged in the housing, and the control unit cavity and the exhaust channel are connected through the breathing channel; A waterproof breathable valve is arranged in the shell and is connected to the breathing passage. The waterproof breathable valve is used to prevent liquid from passing through and allow gas to pass through.

2. The trailer control valve according to claim 1, It is characterized in that An energy reduction valve is also provided in the breathing passage, and the energy reduction valve is used to reduce the pressure of the gas entering the waterproof breathable valve.

3. The trailer control valve according to claim 2, It is characterized in that The energy reduction valve comprises at least one energy reduction valve core, the energy reduction valve core is in contact with the inner wall of the breathing passage, and at least one flow guide port is arranged on the energy reduction valve core.

4. The trailer control valve according to claim 3, It is characterized in that The energy reduction valve core comprises a body and at least two baffles, wherein the baffles are connected to the body, and the guide port is located between two adjacent baffles.

5. The trailer control valve according to claim 4, It is characterized in that A plurality of energy reduction valves are provided in the breathing channel, and the plurality of energy reduction valves include adjacent first energy reduction valves and second energy reduction valves. In a plane perpendicular to the axial direction of the breathing channel, the projection of the guide port of the first energy reduction valve is located within the projection range of the baffle of the second energy reduction valve.

6. The trailer control valve according to claim 4, It is characterized in that The energy reduction valve core is provided with a plurality of the guide ports, and the plurality of the guide ports are arranged at intervals along the circumference of the energy reduction valve core.

7. The trailer control valve according to claim 4, It is characterized in that The main body is also provided with a vent hole.

8. The trailer control valve according to claim 4, It is characterized in that The energy reduction valve core is in a frustum shape, and the diameter of the energy reduction valve core gradually decreases from the control unit cavity to the exhaust channel side.

9. The trailer control valve according to any one of claims 3 to 8, It is characterized in that The energy reduction valve further comprises a valve housing, the energy reduction valve core is detachably arranged in the valve housing, and the valve housing is interference-connected with the inner wall of the breathing passage.

10. The trailer control valve according to claim 9, It is characterized in that A plurality of first slots are provided in the valve housing, a plurality of first buckles are provided on the energy reduction valve core, the plurality of first slots correspond to the plurality of first buckles one by one, and the energy reduction valve core is detachably connected to the plurality of first slots in the valve housing through the plurality of first buckles.

11. The trailer control valve according to claim 10, It is characterized in that A plurality of energy reduction valves are arranged in the breathing channel, the plurality of energy reduction valves include adjacent first energy reduction valves and second energy reduction valves, and the first energy reduction valve and the second energy reduction valve are detachably connected; A connecting portion is also provided on the valve housing of the first energy reduction valve, and a diameter of the connecting portion is larger than a diameter of the valve housing of the first energy reduction valve. A plurality of second clips are provided on the connecting portion, and a plurality of second clips are provided on the valve housing of the second energy reduction valve. The plurality of second clips correspond one to one to the plurality of second clips, and the first energy reduction valve is detachably connected to the plurality of second clips of the second energy reduction valve via the plurality of second clips.

12. The trailer control valve according to claim 1, It is characterized in that The control unit cavity is provided with an exhaust port, the waterproof breathable valve is arranged in the exhaust port, and the breathing channel is connected with the exhaust port; The waterproof breathable valve comprises a waterproof breathable membrane, which shields the exhaust port and is used to prevent liquid from passing through and allow gas to pass through.

13. A vehicle braking system, It is characterized in that It comprises a trailer pneumatic brake system and a trailer pneumatic brake system, wherein the trailer pneumatic brake system is connected to the trailer pneumatic brake system via a trailer control valve as described in any one of claims 1-12.

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