Exhaust brake valve with sealing structure

Abstract

The utility model relates to an exhaust brake valve with a sealing structure, which comprises a valve body, a valve plate, a main shaft and a driving mechanism, the driving mechanism drives the valve plate to rotate through the main shaft, and a sealing mechanism is arranged in the valve body. The main shaft penetrates through the valve body and is rotationally connected with the valve body; a sleeve is rotationally arranged in the valve body and located on the outer wall of the spindle, a torsional spring is arranged between the sleeve and the spindle, and the valve plate is arranged on the outer wall of the sleeve. The valve plate is elastically limited through the torsional spring, the air cylinder, the rack and the gear are matched with the ratchet mechanism, and the valve plate is high in response speed and good in braking performance; the sealing protrusion and the sealing groove are arranged between the valve plate and the limiting boss, positive pressure attachment is achieved through the torsional spring, the sealing performance is high, and therefore the braking performance is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile brake devices, in particular to an exhaust brake valve with a sealing structure. Background Art

[0002] The exhaust brake valve is a supplementary component of the vehicle's service brake. It uses the engine as an air compressor to generate braking torque, thereby slowing down the vehicle. The exhaust brake valve is installed in the exhaust pipe. The butterfly valve is used to close the exhaust pipe channel so that the engine piston is subjected to the gas back pressure during the exhaust stroke, preventing the engine from running and generating a braking effect, thereby achieving the purpose of controlling the vehicle speed. During the operation of the exhaust brake valve, the exhaust gas in the exhaust pipe will leak out from the gap between the rotating shaft and the support plate.

[0003] However, the exhaust brake valve of the prior art does not have any sealing device between the shaft sleeve and the support plate, or uses an integral sealing gasket at this position. Due to the limitation of assembly requirements and the elasticity of its own materials, there is almost no compression between the gasket and the rotating shaft, so it cannot play a sealing role, thereby affecting the exhaust brake effect. Therefore, it is urgent to develop an exhaust brake valve, which installs a graphite gasket between the shaft sleeve and the support plate, which can effectively solve the sealing problem existing in the prior art, thereby improving the braking function of the exhaust brake valve.

[0004] Chinese utility model patent 201520852542.1 discloses an exhaust brake valve with a sealing structure, including a booster cylinder assembly, a valve body assembly, a rocker arm assembly, a ball head assembly and a support plate, wherein the booster cylinder assembly and the valve body assembly are connected by the support plate; the valve body assembly includes a graphite gasket, a valve body, a valve plate, a rotating shaft and a sleeve, wherein the graphite gasket is arranged at the gap formed between the supporting plate, the valve body, the rotating shaft and the sleeve; the booster cylinder assembly includes a dustproof device and a one-way valve device. Under the premise of meeting the assembly requirements, the exhaust brake valve optimizes the shape of the parts to achieve sufficient compression after assembly to ensure the sealing effect. At the same time, the graphite gasket made of flexible graphite plate has the characteristics of high temperature resistance and strong toughness, can withstand certain deformation, and the parts will not fail when the shape changes.

[0005] It solves the above-mentioned sealing problem and improves the sealing performance, but it still has the following defects:

[0006] 1. The booster cylinder is used to drive the valve plate to rotate. The closing speed of the valve plate is affected by the output of the brake cylinder, and the response efficiency is not high enough;

[0007] 2. Its sealing structure uses graphite gaskets to improve the sealing performance between the valve plate and the rotating parts of the valve body. However, there are still sealing problems at the contact between the outer wall of the valve plate and the inner wall of the valve body. Under high temperature and high pressure environment, the deformation of the valve plate will affect the sealing performance or the movement of the valve plate will be sluggish.

[0008] In order to solve the above technical problems, the utility model provides an exhaust brake valve which can respond quickly and has strong sealing performance. Summary of the invention

[0009] Technical problems to be solved by the utility model

[0010] The valve plate is rotated by a power cylinder. The closing speed of the valve plate is affected by the output of the brake cylinder, and the response efficiency is not high enough. The sealing structure uses a graphite gasket to improve the sealing performance between the valve plate and the rotating parts of the valve body. However, there are still sealing problems at the contact between the outer wall of the valve plate and the inner wall of the valve body. Under high temperature and high pressure environment, deformation of the valve plate will affect the sealing performance or sluggish movement of the valve plate.

[0011] Technical solutions for solving technical problems

[0012] Further advantageous and in some cases inventive embodiments and developments of the invention are explained in the following description.

[0013] An exhaust brake valve with a sealing structure comprises a valve body and a valve plate, and also comprises a main shaft and a driving mechanism, wherein the driving mechanism drives the valve plate to rotate through the main shaft, and a sealing mechanism is arranged in the valve body;

[0014] The main shaft passes through the valve body and is rotatably connected to the valve body;

[0015] A sleeve is rotatably arranged in the valve body, the sleeve is located on the outer wall of the main shaft, a torsion spring is arranged between the sleeve and the main shaft, and the valve plate is arranged on the outer wall of the sleeve.

[0016] Preferably, one end of the torsion spring is connected to the inner wall of the valve body, and the other end thereof is connected to the outer wall of the main shaft.

[0017] Preferably, the driving mechanism comprises:

[0018] A mounting plate is arranged above the valve body, the main shaft passes through the mounting plate and is rotatably connected to the mounting plate, and a cylinder is arranged on the mounting plate;

[0019] A rack, mounted on the output end of the cylinder;

[0020] The transmission gear is arranged on the outer side of the main shaft through a ratchet mechanism.

[0021] Preferably, the transmission gear is meshed with the rack.

[0022] Preferably, the sealing mechanism comprises:

[0023] There are two limiting bosses, both of which are installed on the inner wall of the valve body and are located on both sides of the valve plate respectively;

[0024] A sealing groove, embedded in a side wall of each of the limiting bosses close to the valve plate;

[0025] The sealing protrusions match the sealing grooves and are respectively installed on the outer walls of the valve plate corresponding to the sealing grooves.

[0026] Preferably, the limiting boss is configured to be in a semicircular ring shape.

[0027] Preferably, the direction in which the transmission gear drives the valve plate to separate from the limiting boss through the main shaft and the sleeve is the locking direction of the ratchet mechanism.

[0028] Preferably, the torsion spring provides pressure to the valve plate toward the limiting boss.

[0029] Preferably, the outer wall of the valve body is arranged on a heat insulation cover.

[0030] Effect of utility model

[0031] 1. The torsion spring is used to elastically limit the valve plate, and the cylinder, rack and pinion are used in conjunction with the ratchet mechanism. The valve plate has a fast response speed and good braking performance;

[0032] 2. There are sealing protrusions and sealing grooves between the valve plate and the limiting boss, and positive pressure fitting is achieved through a torsion spring, with strong sealing performance, thereby improving braking performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following is a detailed description of the embodiments of the present invention according to the accompanying drawings. In the accompanying drawings:

[0034] Figure 1 It is a structural view of the utility model;

[0035] Figure 2 This is a structural view of the hidden part of the valve plate and the valve body of the utility model;

[0036] Figure 3 This is a structural view of the hidden parts of the valve plate, sleeve and valve body of the utility model;

[0037] Figure 4 It is a cross-sectional view of the utility model;

[0038] Figure 5 is the above Figure 2 A partial enlarged view of "A".

[0039] Description of Reference Numerals

[0040] 1. Cylinder; 1-1. Mounting plate; 2. Rack; 201. Transmission gear; 202. Ratchet mechanism; 203. Main shaft; 204. Sleeve; 204-1. Torsion spring; 205. Valve plate; 205-1. Sealing protrusion; 3. Valve body; 3-1. Heat insulation cover; 301. Limiting boss; 301-1. Sealing groove. DETAILED DESCRIPTION

[0041] Hereinafter, an exhaust brake valve having a sealing structure which is one embodiment of the present invention will be described with reference to the drawings.

[0042] Please refer to Figure 1-Figure 5 As shown, an exhaust brake valve with a sealing structure includes a valve body 3 and a valve plate 205, and also includes a main shaft 203 and a driving mechanism. The driving mechanism is used to drive the valve plate 205 to operate through the main shaft 203, and the valve body 3 rotates to control the opening and closing of the exhaust pipe channel;

[0043] A sealing mechanism is provided in the valve body 3;

[0044] The outer wall of the valve body 3 is provided with a heat insulation cover 3-1;

[0045] Regarding the valve body 3, it is configured as a tube, and the main shaft 203 penetrates the valve body 3 and is rotatably connected to the valve body 3;

[0046] The sleeve 204 is installed outside the main shaft 203 and is rotatably arranged inside the valve body 3. The outer wall of the sleeve 204 is provided with a valve plate 205;

[0047] The torsion spring 204 - 1 is arranged between the main shaft 203 and the valve body 3;

[0048] Specifically, one end of the torsion spring 204 - 1 is connected to the inner wall of the valve body 3 , and the other end thereof is connected to the outer wall of the main shaft 203 ;

[0049] During use, the torsion spring 204 - 1 applies a torsion force to the sleeve 204 , thereby driving the valve plate 205 to rotate;

[0050] Regarding the sealing mechanism, including:

[0051] There are two limiting bosses 301, both of which are installed on the inner wall of the valve body 3 and are located on both sides of the valve plate 205;

[0052] Specifically, the limiting boss 301 is configured as a semicircular ring;

[0053] A sealing groove 301 - 1 is embedded in the side wall of each limiting boss 301 close to the valve plate 205 ;

[0054] The sealing protrusion 205-1 is fixedly mounted on the side wall of the valve plate 205 close to the sealing groove 301-1;

[0055] Specifically, the sealing groove 301 - 1 matches the sealing protrusion 205 - 1;

[0056] During use, the valve plate 205 rotates, and the sealing protrusion 205-1 on the side wall of the valve plate 205 is embedded in the sealing groove 301-1 on the side wall of the limiting boss 301, thereby improving the sealing effect. In addition, due to the limiting of the torsion spring 204-1, in the standard position (the valve plate 205 is in the working state, the exhaust pipe is closed, and the valve plate 205 closes the inside of the valve body 3 at this time), the valve plate 205 fits on the limiting protrusion;

[0057] Regarding the drive mechanism, including:

[0058] The cylinder 1 is installed through the mounting plate 1-1, and a rack 2 is provided at the output end of the cylinder 1;

[0059] The main shaft 203 passes through the mounting plate 1-1 and is rotatably connected to the mounting plate 1-1;

[0060] The transmission gear 201 is mounted on the outer wall of the main shaft 203 and meshes with the rack 2;

[0061] A ratchet mechanism 202 is provided between the transmission gear 201 and the main shaft 203;

[0062] Specifically, the transmission gear 201 matches the rack 2;

[0063] During use, the cylinder 1 drives the rack 2 to perform linear displacement, and based on the transmission principle of the rack 2, drives the transmission gear 201 to rotate, thereby driving the main shaft 203 to rotate through the ratchet mechanism 202;

[0064] Since the valve plate 205 and the valve body 3 are elastically limited by the torsion spring 204 - 1 , the cylinder 1 drives the main shaft 203 to rotate through the rack 2 (the rotation direction is the direction of driving the valve plate 205 to disengage from the limiting protrusion) which is the locking direction of the ratchet mechanism 202 .

[0065] Normally used status

[0066] The staff installed the exhaust brake valve included in the device into the automobile brake mechanism:

[0067] Brake valve not working state:

[0068] The cylinder 1 works, and drives the transmission gear 201 and the main shaft 203 to rotate through the rack 2 (at this time, the ratchet mechanism 202 is in a locked state), thereby driving the valve plate 205 to separate from the limiting boss 301, and the fluid can flow inside the valve body 3;

[0069] When the brake valve is in working state, the cylinder 1 is released. Due to the setting of the ratchet mechanism 202, the torsion spring 204-1 drives the valve plate 205 to rebound quickly until the valve plate 205 fits with the limiting protrusion, and the sealing protrusion 205-1 is embedded in the sealing groove 301-1, thereby closing the valve body 3.

[0070] Quick work function

[0071] The torsion spring 204-1 is used to cooperate with the ratchet mechanism 202, the rack 2 and the cylinder 1 to limit the position. In the released state, the torsion spring 204-1 drives the valve plate 205 to rotate. Different from the current configuration of the cylinder 1, the connecting rod mechanism and the ball pair, the valve plate 205 closes faster and has a higher response efficiency.

[0072] High sealing

[0073] Based on the setting of the sealing protrusion 205-1 and the sealing groove 301-1, the sealing performance is improved. Since the valve plate 205 and the limiting boss 301 are limited by the torsion spring 204-1, the limiting protrusion on the valve plate 205 is tightly attached to the limiting groove under the action of the torsion spring 204-1, achieving elastic sealing and further improving the sealing performance.

[0074] Compared with the prior art, the utility model has the following characteristics:

[0075] 1. The torsion spring 204-1 is used to elastically limit the valve plate 205. The cylinder 1 and the rack 2 gear cooperate with the ratchet mechanism 202. The valve plate 205 has a fast response speed and good braking performance.

[0076] 2. A sealing protrusion 205 - 1 and a sealing groove 301 - 1 are provided between the valve plate 205 and the limiting boss 301 , and positive pressure fitting is achieved through the torsion spring 204 - 1 , with strong sealing performance, thereby improving the braking performance.

[0077] The present invention is not limited to the embodiment, and various modifications can be made without departing from the spirit of the present invention.

Claims

1. An exhaust brake valve with a sealing structure, comprising a valve body (3) and a valve plate (205), characterized in that: It also includes a main shaft (203) and a driving mechanism, wherein the driving mechanism drives the valve plate (205) to rotate through the main shaft (203), and a sealing mechanism is arranged in the valve body (3); The main shaft (203) passes through the valve body (3) and is rotatably connected to the valve body (3); A sleeve (204) is rotatably arranged inside the valve body (3); the sleeve (204) is located on the outer wall of the main shaft (203); a torsion spring (204-1) is arranged between the sleeve (204) and the main shaft (203); and the valve plate (205) is arranged on the outer wall of the sleeve (204).

2. The exhaust brake valve with a sealing structure according to claim 1, characterized in that: One end of the torsion spring (204-1) is connected to the inner wall of the valve body (3), and the other end is connected to the outer wall of the main shaft (203).

3. The exhaust brake valve with a sealing structure according to claim 1, characterized in that: The driving mechanism comprises: A mounting plate (1-1) is arranged above the valve body (3); the main shaft (203) passes through the mounting plate (1-1) and is rotatably connected to the mounting plate (1-1); and a cylinder (1) is arranged on the mounting plate (1-1); A rack (2) mounted on the output end of the cylinder (1); The transmission gear (201) is arranged on the outside of the main shaft (203) through a ratchet mechanism (202).

4. The exhaust brake valve with a sealing structure according to claim 3, characterized in that: The transmission gear (201) is meshed with the rack (2).

5. The exhaust brake valve with a sealing structure according to claim 4, characterized in that: The sealing mechanism comprises: There are two limiting bosses (301), both of which are installed on the inner wall of the valve body (3) and are respectively located on both sides of the valve plate (205); A sealing groove (301-1) embedded in a side wall of each limiting boss (301) close to the valve plate (205); The sealing protrusion (205-1) matches the sealing groove (301-1) and is respectively installed on the outer wall of the valve plate (205) corresponding to the sealing groove (301-1).

6. The exhaust brake valve with a sealing structure according to claim 5, characterized in that: The limiting boss (301) is configured in a semicircular ring shape.

7. The exhaust brake valve with a sealing structure according to claim 6, characterized in that: The direction in which the transmission gear (201) drives the valve plate (205) to separate from the limiting boss (301) through the main shaft (203) and the sleeve (204) is the locking direction of the ratchet mechanism (202).

8. The exhaust brake valve with a sealing structure according to claim 5, characterized in that: The torsion spring (204-1) provides pressure to the valve plate (205) toward the limiting boss (301).

9. The exhaust brake valve with a sealing structure according to claim 1, characterized in that: The outer wall of the valve body (3) is arranged on the heat insulation cover (3-1).

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