Hand control valve exhaust nozzle

Abstract

The invention relates to a manual control valve exhaust nozzle which comprises a base and a connector, the base is used for being connected with a manual control valve, and the connector is used for being connected with an exhaust pipe in a sleeved mode. The rear end of the connector is connected with the base, and a damping ring and a vacuum ring are sequentially arranged on the outer wall of the connector from front to back. The damping ring and the vacuum ring protrude out of the outer wall of the connector. A vacuum storage area is formed between the damping ring and the vacuum ring; by arranging the damping ring and the vacuum ring, the technical scheme combination of interference resistance and vacuum resistance is completed, the anti-loosening effect of exhaust pipe installation is improved, under the interference resistance of the vacuum ring, the exhaust pipe in a vacuum storage area tends to be straightened, at the moment, vacuum resistance appears on a rubber pipe and a transition face, and the larger the external force for pulling the exhaust pipe is, the larger the vacuum resistance is, the larger the external force for pulling the exhaust pipe is. The larger the rubber deformation is, the larger the vacuum degree generated by the vacuum storage area is, the larger the converted vacuum resistance is, no clamp needs to be additionally arranged, and the material object cost and the clamp installation cost are saved.

Description

Technical Field

[0001] The invention relates to the technical field of a manual control valve of a commercial vehicle air brake system, and in particular to an exhaust nozzle of a manual control valve. Background Art

[0002] The manual valve used in the air brake system of commercial vehicles belongs to the air cut-off brake. When driving, the manual valve outputs air pressure to the rear end. When parking, the air pressure at the output end of the manual valve must be zero. When the manual valve handle is turned from driving to parking, the air pressure at the rear end of the manual valve will be exhausted from the manual valve. Because the manual valve is installed in the cab, exhausting air directly from the manual valve will make the driver and passengers feel strong noise. A certain length of exhaust pipe is required to keep the exhaust noise away from the cab. The manual valve exhaust nozzle is the device that connects the manual valve and the exhaust pipe.

[0003] There are currently two common structures for manual valve exhaust nozzles: one is a metal bamboo-joint structure, in which the exhaust nylon tube is pressed into the exhaust nozzle, and the bamboo-joint barbs are used to prevent the exhaust pipe from falling off. Although the connection is tight, the cost is high, and special tooling is required for assembly, and it cannot be disassembled; the other is a plastic exhaust nozzle, in which an annular protrusion is provided at the mouth of the exhaust nozzle, and the protrusion is connected to the rubber exhaust pipe by interference fit, but the fastening effect is poor and it is easy to fall off. If the interference fit amount is increased, installation difficulties will occur. Therefore, some vehicle manufacturers will add additional cable ties or clamps for fastening, which increases physical and labor costs. Summary of the invention

[0004] Based on the above description, the present invention provides a manual valve exhaust nozzle, which completes the technical solution combination of interference resistance and vacuum resistance by setting a damping ring and a vacuum ring, thereby improving the anti-loosening effect of the exhaust pipe installation.

[0005] The technical solution of the present invention for solving the above technical problems is as follows: a manual valve exhaust nozzle, comprising a base and a joint, the base is used to connect the manual valve, and the joint is used to sleeve the exhaust pipe; the rear end of the joint is connected to the base, and the outer wall of the joint is sequentially provided with a damping ring and a vacuum ring from front to back; the damping ring and the vacuum ring both protrude from the outer wall of the joint; a vacuum reserve area is formed between the damping ring and the vacuum ring.

[0006] Based on the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the maximum outer diameter of the damping ring is greater than the maximum outer diameter of the vacuum ring.

[0008] Furthermore, the damping ring includes a slowly descending surface arranged on one side close to the vacuum reserve area, and the diameter of the slowly descending surface gradually decreases from front to back; the vacuum ring includes a slowly rising surface arranged on one side close to the vacuum reserve area, and the diameter of the slowly rising surface gradually increases from front to back.

[0009] Furthermore, the slowly descending surface and the slowly ascending surface are connected via a transition surface, and the diameter of the transition surface remains unchanged from front to back.

[0010] Furthermore, the diameter of the transition surface is larger than the inner diameter of the exhaust pipe.

[0011] Furthermore, the vacuum ring includes a resistance surface arranged at the rear side, the diameter of the resistance surface gradually decreases from front to back, and the amplitude of the change in the diameter of the resistance surface is greater than the amplitude of the change in the diameter of the slow-rise surface.

[0012] Furthermore, the connector includes an introduction portion arranged at the front end; a plurality of through grooves are sequentially arranged along the circumferential direction on the introduction portion, and the front end of the through grooves extends to the front end of the connector, dividing the introduction portion into a plurality of introduction claws.

[0013] Furthermore, the rear end of the through groove extends to the middle of the front side surface of the damping ring.

[0014] Furthermore, the outer diameter of the introduction portion is greater than the inner diameter of the exhaust pipe.

[0015] Furthermore, an end fixing surface located at the rear side of the vacuum ring is provided on the outer wall of the joint, and the diameter of the end fixing surface is larger than the inner diameter of the exhaust pipe.

[0016] Compared with the prior art, the technical solution of this application has the following beneficial technical effects: 1. The present invention completes the technical solution combination of interference resistance and vacuum resistance by arranging a damping ring and a vacuum ring, thereby improving the anti-loosening effect of the exhaust pipe installation. Under the interference resistance of the vacuum ring, the exhaust pipe in the vacuum reserve area will have a tendency to straighten. At this time, vacuum resistance will appear between the rubber tube and the transition surface. The greater the external force pulling the exhaust pipe, the greater the rubber deformation, the greater the vacuum degree generated by the vacuum reserve area, and the greater the converted vacuum resistance; 2. The present invention does not require additional clamps, thus saving the physical cost and the installation cost of the clamps; 3. By providing a through groove extending to the front side of the damping ring, it is avoided that a vacuum area and vacuum resistance are formed on the front side of the damping ring when installing the exhaust pipe, thereby reducing the installation resistance of the exhaust pipe and facilitating the installation of the exhaust pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of a manual valve exhaust nozzle in the prior art; Figure 2 A schematic diagram of the structure of a manual valve exhaust nozzle provided in an embodiment of the present invention; Figure 3 A cross-sectional view of a manual valve exhaust nozzle in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the vacuum storage area in an embodiment of the present invention; In the accompanying drawings, the components represented by the reference numerals are listed as follows: 1. Base; 2. Joint; 21. Introduction part; 211. Through groove; 212. Introduction claw; 213. Bevel; 22. Damping ring; 221. Introduction surface; 222. Slow-down surface; 23. Transition surface; 24. Vacuum ring; 241. Slow-up surface; 242. Resistance surface; 25. End fixing surface; 251. Frosted surface; 26. Vacuum reserve area; 3. Exhaust pipe. DETAILED DESCRIPTION

[0018] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0020] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0021] A manual valve exhaust nozzle comprises a base 1 and a joint 2, wherein the base 1 is used for connecting the manual valve, and the joint 2 is used for sleeve-connecting an exhaust pipe.

[0022] The rear end of the joint 2 is connected to the base 1, and an introduction portion 21 is provided at the front end of the joint 2. A damping ring 22, a transition surface 23, a vacuum ring 24 and an end fixing surface 25 are provided on the outer wall of the joint 2 and located on the rear side of the introduction portion 21 from front to back. The damping ring 22 and the vacuum ring 24 both protrude from the outer wall of the joint 2, and the maximum outer diameter of the damping ring 22 is greater than the maximum outer diameter of the vacuum ring 24.

[0023] The diameters of the outer wall of the introduction portion 21 , the transition surface 23 and the end fixing surface 25 are all larger than the inner diameter of the exhaust pipe, so that a full interference fit between the joint 2 and the exhaust pipe is achieved.

[0024] The front side of the damping ring 22 is provided with an introduction surface 221, and the rear side of the damping ring 22 is provided with a slow-down surface 222. The diameter of the introduction surface 221 gradually increases from front to back, and the diameter of the slow-down surface 222 gradually decreases from front to back, so that the amplitude of the diameter change of the slow-down surface 222 is smaller than the amplitude of the diameter change of the introduction surface 221.

[0025] The front side of the vacuum ring 24 is provided with a slow-rising surface 241, and the rear side of the vacuum ring 24 is provided with a resistance surface 242. The diameter of the slow-rising surface 241 gradually increases from front to back, and the diameter of the resistance surface 242 gradually decreases from front to back, so that the amplitude of the diameter change of the slow-rising surface 241 is smaller than the amplitude of the diameter change of the resistance surface 242.

[0026] Therefore, the descending surface 222 and the ascending surface 241 have a smaller slope, and the introduction surface 221 and the resistance surface 242 have a larger slope.

[0027] The diameter of the transition surface 23 remains constant from front to back, and a vacuum reserve area 26 is formed between the slow-falling surface 222 , the transition surface 23 and the slow-rise surface 241 .

[0028] The present invention completes the technical solution combination of interference resistance and vacuum resistance by arranging the damping ring 22 and the vacuum ring 24, thereby improving the anti-loosening effect of the exhaust pipe installation. Under the interference resistance of the vacuum ring 24, the exhaust pipe in the vacuum reserve area 26 will tend to straighten. At this time, vacuum resistance will appear between the rubber tube and the transition surface 23. The greater the external force pulling the exhaust pipe, the greater the rubber deformation, the greater the vacuum degree generated by the vacuum reserve area 26, and the greater the converted vacuum resistance.

[0029] In addition, the connector 2 includes an introduction portion 21 disposed at the front end. The introduction portion 21 is provided with a plurality of through slots 211 in sequence along the circumferential direction, and the front end of the through slots 211 extends to the front end of the connector 2, dividing the introduction portion 21 into a plurality of introduction claws 212. The rear end of the through slots 211 extends to the middle of the introduction surface 221.

[0030] When installing the exhaust pipe, first sleeve the inner hole of the exhaust pipe on the introduction part 21, and push the end of the exhaust pipe through the damping ring 22, the vacuum reserve area 26, the vacuum ring 24 in sequence, and finally reach the end fixing surface 25, and the end of the exhaust pipe is fixed by the end fixing surface 25 through an interference fit.

[0031] Specifically, when the end of the exhaust pipe passes through the introduction part 21, the exhaust pipe and the introduction part 21 are interference fit, but the contact area between the introduction claw 212 and the rubber tube is small, and the introduction claw 212 can be slightly deformed, so the resistance when the exhaust pipe is installed is much smaller than that of the existing technical structure. An angle 213 is provided on the front outer wall of the introduction part 21, and the front outer diameter of the angle 213 is smaller than the inner diameter of the exhaust pipe, so that the introduction part 21 is easy to insert into the exhaust pipe.

[0032] When the end of the exhaust pipe passes through the damping ring 22, a vacuum area is easily formed at the bottom of the introduction surface 221 of the damping ring 22, thereby generating vacuum resistance to hinder the assembly of the exhaust pipe. The through groove 211 of this embodiment extends to the middle of the introduction surface 221, so that the area at the bottom of the introduction surface 221 that is prone to generate vacuum resistance is connected to the inside of the joint 2, thereby avoiding the generation of a vacuum area, and the exhaust pipe will not generate vacuum resistance to hinder the assembly when passing through the damping ring 22.

[0033] When the end of the exhaust pipe passes through the vacuum reserve area 26, due to the small slope of the slow-down surface 222 and the slow-up surface 241, the diameters of the slow-down surface 222, the transition surface 23 and the slow-up surface 241 change smoothly, which can ensure that the inner wall of the exhaust pipe is closely attached to the slow-down surface 222, the transition surface 23 and the slow-up surface 241, reduce the residual gas in the vacuum reserve area 26, and maximize the conversion of vacuum adsorption force into friction resistance. When the end of the exhaust pipe passes through the vacuum ring 24, the slope of the slow-rising surface 241 is small, so that the vacuum resistance generated at the front end of the vacuum ring 24 to hinder assembly is avoided. In addition, the maximum diameter of the vacuum ring 24 is smaller than the maximum diameter of the damping ring 22, and the interference resistance of the exhaust pipe at the vacuum ring 24 is smaller than the interference resistance at the damping ring 22, so that the end of the exhaust pipe can pass through the vacuum ring 24 more easily.

[0034] After the exhaust pipe is installed in place, the damping ring 22 is the largest outer diameter of the joint 2, and the damping ring 22 bears the most important interference resistance anti-loosening function. The vacuum reserve area 26 fits tightly with the inner wall of the exhaust pipe to play the vacuum resistance anti-loosening function.

[0035] Specifically, when the exhaust pipe is pulled by an external force, the exhaust pipe first needs to overcome the interference resistance at the damping ring 22. Afterwards, under the interference resistance of the vacuum ring 24, the exhaust pipe in the vacuum reserve area 26 will tend to be straightened, and at this time, vacuum resistance will appear between the exhaust pipe and the transition surface 23, thereby further preventing the exhaust pipe from being pulled. The greater the external force pulling the exhaust pipe, the greater the deformation of the exhaust pipe in the vacuum reserve area 26, the greater the vacuum degree generated between the exhaust pipes, and the greater the converted vacuum resistance.

[0036] Since the slope of the resistance surface 242 is relatively large, the backward resistance generated to the exhaust pipe is greater, and it is also easier to generate a vacuum area on the rear side of the vacuum ring 24 when the exhaust pipe is pulled, thereby increasing the difficulty of relative sliding between the exhaust pipe and the vacuum ring 24. In addition, a frosted surface 251 can be provided on the end fixing surface 25 to increase the friction between the exhaust pipe and the joint 2 on the end fixing surface 25, further preventing the end of the exhaust pipe from being pulled.

[0037] The maximum outer diameter of the damping ring 22 is greater than the maximum outer diameter of the vacuum ring 24 , which can also prevent the front and rear sides of the damping ring 22 from being connected due to the exhaust pipe's tendency to straighten when the exhaust pipe is pulled, thereby ensuring the vacuum state of the vacuum reserve area 26 .

[0038] This embodiment achieves the technical solution combination of interference resistance and vacuum resistance by providing the damping ring 22 and the vacuum ring 24, thereby improving the anti-loosening effect of the exhaust pipe installation. In addition, this embodiment does not require additional clamps, thus saving the physical cost and the clamp installation cost.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A manual valve exhaust nozzle, characterized in that: It includes a base and a joint, the base is used to connect the manual valve, and the joint is used to sleeve the exhaust pipe; the rear end of the joint is connected to the base, and the outer wall of the joint is sequentially provided with a damping ring and a vacuum ring from front to back; the damping ring and the vacuum ring both protrude from the outer wall of the joint; a vacuum reserve area is formed between the damping ring and the vacuum ring.

2. A manual valve exhaust nozzle according to claim 1, characterized in that: The maximum outer diameter of the damping ring is greater than the maximum outer diameter of the vacuum ring.

3. A manual valve exhaust nozzle according to claim 1, characterized in that: The damping ring includes a slow-down surface arranged on one side close to the vacuum reserve area, and the diameter of the slow-down surface gradually decreases from front to back; the vacuum ring includes a slow-up surface arranged on one side close to the vacuum reserve area, and the diameter of the slow-up surface gradually increases from front to back.

4. A manual valve exhaust nozzle according to claim 3, characterized in that: The slowly descending surface and the slowly ascending surface are connected via a transition surface, and the diameter of the transition surface remains unchanged from front to back.

5. A manual valve exhaust nozzle according to claim 4, characterized in that: The diameter of the transition surface is greater than the inner diameter of the exhaust pipe.

6. A manual valve exhaust nozzle according to claim 3, characterized in that: The vacuum ring comprises a resistance surface arranged at the rear side, the diameter of the resistance surface gradually decreases from the front to the rear, and the amplitude of the diameter change of the resistance surface is greater than the amplitude of the diameter change of the slow rise surface.

7. A manual valve exhaust nozzle according to claim 1, characterized in that: The joint comprises an introduction part arranged at the front end; a plurality of through grooves are arranged in sequence along the circumferential direction on the introduction part, and the front end of the through grooves extends to the front end of the joint, dividing the introduction part into a plurality of introduction claws.

8. A manual valve exhaust nozzle according to claim 7, characterized in that: The rear end of the through slot extends to the middle of the front side surface of the damping ring.

9. The manual valve exhaust nozzle according to claim 7, characterized in that: The outer diameter of the introduction portion is larger than the inner diameter of the exhaust pipe.

10. The manual valve exhaust nozzle according to claim 1, characterized in that: An end fixing surface located at the rear side of the vacuum ring is arranged on the outer wall of the joint, and the diameter of the end fixing surface is larger than the inner diameter of the exhaust pipe.

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