Corrosion-resistant EGR (Exhaust Gas Recirculation) valve shell

Abstract

The utility model relates to the technical field of valve body corrosion prevention, in particular to a corrosion-resistant EGR valve shell which comprises a valve body. The anti-corrosion base is connected with a buffer shaft through a detachable mounting device, and the surface of the buffer shaft is connected with an anti-corrosion buffer leaf plate; and centrifugally scraping the frame. The centrifugal scraping frame on the anti-corrosion buffering blade plate is driven by centrifugal force to move in the high-speed rotation period under the influence of air pressure, the centrifugal scraping frame continuously reciprocates along the side edge of the anti-corrosion buffering blade plate, and the effect of scraping and cleaning the surface of the anti-corrosion buffering blade plate is achieved in the movement period; therefore, the problem that the anti-corrosion buffer leaf plate is corroded due to particle residues in the gas is avoided, the corrosion resistance of the anti-corrosion buffer leaf plate is improved, meanwhile, the anti-corrosion buffer leaf plate buffers the gas, direct corrosion of corrosives in the gas to the inner wall of the valve element and the inner wall of the valve shell can be reduced, and the service life of the valve element is prolonged. The effect of improving corrosion resistance of the valve element and the inner wall of the valve shell is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of valve body corrosion prevention, in particular to a corrosion-resistant EGR valve housing. Background Art

[0002] EGR valves are divided into poppet valves and butterfly valves. Poppet valves are usually used in diesel engines or small gasoline engines, and butterfly valves are usually used in gasoline engines, especially supercharged engines and engines with high requirements for EGR rate. When the EGR system is working, the entire channel is filled with exhaust gas, which contains particles. After the exhaust gas enters the EGR valve, the particles in the exhaust gas will be deposited in the EGR valve, thereby corroding the EGR valve core.

[0003] The existing EGR valve core is easily damaged by corrosion. One of the factors causing corrosion is that the high-pressure flowing gas contains corrosive particle molecules that strongly impact the valve core. When the valve core is coated with a corrosion-resistant coating, the continuous impact of the corrosive molecules on the valve core will increase the degree of corrosion of the valve core, thereby affecting the service life of the valve core. In view of this, we propose a corrosion-resistant EGR valve housing. Utility Model Content

[0004] In view of the deficiencies of the prior art, the utility model provides a corrosion-resistant EGR valve housing, which solves the problems raised in the above background technology. To achieve the above purpose, the utility model is implemented through the following technical solutions: a corrosion-resistant EGR valve housing, including a valve body, the air intake end of the valve body is connected to an anti-corrosion base, the end of the anti-corrosion base away from the valve body is provided with a mounting groove, the interior of the anti-corrosion base is connected to a buffer shaft through a detachable mounting device, the surface of the buffer shaft is fixedly connected to an anti-corrosion buffer blade, and the surface of the anti-corrosion buffer blade is slidably connected to a centrifugal scraper frame.

[0005] Preferably, the anti-corrosion buffer blade is fixedly connected with a convex edge on one side away from the buffer shaft, and the centrifugal scraper frame is respectively connected with buffer gaskets on both sides close to the buffer shaft and the convex edge.

[0006] Preferably, the detachable mounting device includes a fixed nut seat, one end of the fixed nut seat is fixedly connected to the inside of the corrosion-resistant base, the internal thread of the fixed nut seat is connected to a screw shaft, the end of the screw shaft away from the fixed nut seat is rotatably connected to a U-shaped connecting rod, and the end of the U-shaped connecting rod is elastically connected to a sleeve shaft via a spring.

[0007] Preferably, the inner wall of the sleeve shaft is slidably connected to the surface of the U-shaped connecting rod, and the end of the sleeve shaft away from the U-shaped connecting rod is fixedly connected to a ring through a rubber ring, and the interior of the ring is rotatably connected to the end of the buffer shaft.

[0008] Preferably, a clamping plate is fixedly connected to the fixing screw seat, and the number of the clamping plates is set to two, and the two clamping plates are symmetrically distributed with the center line of the fixing screw seat as the symmetry axis.

[0009] Preferably, a limiting groove is provided on the surface of the screw shaft, the interior of the limiting groove is slidably connected to a limiting sleeve via a sliding block, and a turning handle rod is fixedly connected to the limiting sleeve.

[0010] Preferably, the limiting sleeve is sleeved on the screw shaft, and the surface of the turning handle rod is clamped between the two clamping plates.

[0011] It can be seen from the above technical solutions that the corrosion-resistant EGR valve housing provided in the embodiments of this specification has at least the following beneficial effects:

[0012] (1) The utility model uses centrifugal force to drive the centrifugal scraper frame on the anti-corrosion buffer blade to move during high-speed rotation under the influence of gas pressure. The centrifugal scraper frame continuously reciprocates along the side of the anti-corrosion buffer blade, and achieves the effect of scraping and cleaning the surface of the anti-corrosion buffer blade during the movement, thereby avoiding the problem of corrosion of the anti-corrosion buffer blade due to residual particles in the gas, improving the corrosion resistance of the anti-corrosion buffer blade itself, and at the same time, the anti-corrosion buffer blade buffers the gas, which can reduce the corrosion of the corrosive substances in the gas directly on the valve core and the inner wall of the valve housing, thereby achieving the effect of increasing the corrosion resistance of the valve core and the inner wall of the valve housing.

[0013] (2) The utility model uses a sleeve shaft to use a spring to perform elastic restriction on the U-shaped connecting rod, so that the anti-corrosion buffer blade can be elastically adjusted and adapted according to the gas pressure it is subjected to, thereby improving the working life of the anti-corrosion buffer blade and avoiding the problem of the anti-corrosion buffer blade being damaged as a whole due to the impact of high gas pressure.

[0014] (3) The utility model moves the turning handle rod away from the clamping plate, and directly rotates the turning handle rod after completely breaking away from the clamping effect of the two clamping plates. The turning handle rod drives the screw shaft to rotate through the mutual cooperation between the limit sleeve, the slider and the limit groove. The screw shaft achieves the effect of thread disassembly by rotation, and then achieves the effect of disassembling the U-shaped connecting rod connected to the screw shaft from the fixed screw seat as a whole, thereby achieving the purpose of facilitating disassembly and replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the anti-corrosion base in the utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the middle sleeve shaft of the utility model;

[0019] Figure 4 This is a schematic diagram of the structure of the fixed screw seat in the utility model;

[0020] Figure 5 It is a structural schematic diagram of the screw shaft in the utility model.

[0021] In the figure: 1. valve body; 2. anti-corrosion base; 3. detachable mounting device; 31. fixed screw seat; 32. screw shaft; 33. U-shaped connecting rod; 34. sleeve shaft; 35. sleeve ring; 36. clamping plate; 37. limit sleeve; 38. handle rod; 4. buffer shaft; 5. anti-corrosion buffer blade; 6. centrifugal scraper frame. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example 1

[0024] See also Figure 1-Figure 5 As shown, a corrosion-resistant EGR valve housing includes a valve body 1, the air intake end of the valve body 1 is connected to a corrosion-resistant base 2, an end of the corrosion-resistant base 2 away from the valve body 1 is provided with a mounting groove, the interior of the corrosion-resistant base 2 is connected to a buffer shaft 4 through a detachable mounting device 3, the surface of the buffer shaft 4 is fixedly connected to an anti-corrosion buffer blade 5, and the surface of the corrosion-resistant buffer blade 5 is slidably connected to a centrifugal scraper frame 6. The side of the anti-corrosion buffer blade 5 away from the buffer shaft 4 is fixedly connected with a convex edge for limiting the centrifugal scraper frame 6. The centrifugal scraper frame 6 is respectively connected with buffer gaskets on both sides close to the buffer shaft 4 and the convex edge. The setting of the buffer gasket enables the centrifugal scraper frame 6 to buffer when it hits the convex edge. The anti-corrosion buffer blade 5 is affected by the air pressure and uses centrifugal force to drive the centrifugal scraper frame 6 thereon to move during high-speed rotation. The centrifugal scraper frame 6 continuously reciprocates along the side of the anti-corrosion buffer blade 5, and the surface of the anti-corrosion buffer blade 5 is scraped and cleaned during the movement, thereby avoiding the problem of corrosion of the anti-corrosion buffer blade 5 due to residual particles in the gas, thereby improving the corrosion resistance of the anti-corrosion buffer blade 5 itself. The anti-corrosion buffer blade 5 buffers the gas, which can reduce the corrosion of the corrosive substances in the gas directly on the valve core and the inner wall of the valve housing, thereby achieving the effect of increasing the corrosion resistance of the valve core and the inner wall of the valve housing.

[0025] In this embodiment, the detachable mounting device 3 includes a fixed screw seat 31, one end of which is fixedly connected to the inside of the anti-corrosion base 2, the internal thread of the fixed screw seat 31 is connected to a screw shaft 32, and the end of the screw shaft 32 away from the fixed screw seat 31 is rotatably connected to a U-shaped connecting rod 33, and the end of the U-shaped connecting rod 33 is elastically connected to a sleeve shaft 34 through a spring.

[0026] Furthermore, the inner wall of the sleeve shaft 34 is slidably connected to the surface of the U-shaped connecting rod 33, and the end of the sleeve shaft 34 away from the U-shaped connecting rod 33 is fixedly connected to the ring 35 through a rubber ring. The interior of the ring 35 is rotatably connected to the end of the buffer shaft 4. During the exhaust gas transportation, the multiple anti-corrosion buffer blades 5 are driven by the driving force of the exhaust gas flow to drive the buffer shaft 4 to rotate in the ring 35. During the rotation, the rubber ring on the outer ring of the ring 35 achieves the effect of buffering and protecting the shaft end.

[0027] Example 2

[0028] See also Figure 1-Figure 5 As shown, a clamping plate 36 is fixedly connected to the fixed screw seat 31, and the number of the clamping plates 36 is set to two, and the two clamping plates 36 are symmetrically distributed with the center line of the fixed screw seat 31 as the symmetry axis. A limiting groove is provided on the surface of the screw shaft 32, and a limiting sleeve 37 is slidably connected to the inside of the limiting groove through a slider, and a rotating handle rod 38 is fixedly connected to the limiting sleeve 37. The limiting sleeve 37 is sleeved on the screw shaft 32, and the surface of the rotating handle rod 38 is clamped between the two clamping plates 36.

[0029] In order to solve the problem of disassembly and replacement of the anti-corrosion buffer blade 5 as a whole, the handle rod 38 is moved away from the clamping plate 36, and the handle rod 38 is directly rotated after it is completely separated from the clamping effect of the two clamping plates 36. The handle rod 38 drives the screw shaft 32 to rotate through the mutual cooperation between the limit sleeve 37 and the slider and the limit groove. The screw shaft 32 achieves the effect of threaded disassembly by rotation, and then achieves the effect of disassembling the U-shaped connecting rod 33 connected to the screw shaft 32 from the fixed screw seat 31 as a whole, thereby achieving the purpose of facilitating disassembly and replacement.

[0030] The utility model discloses a corrosion-resistant EGR valve housing. When in use, the corrosion-resistant base 2 is integrally installed at the intake end of the valve body 1. When the exhaust gas is transported, the corrosion-resistant buffer blade 5 buffers the exhaust gas to prevent the exhaust gas from directly impacting the valve core and corroding the valve core. During the exhaust gas transportation, the plurality of corrosion-resistant buffer blades 5 are driven by the driving force of the exhaust gas flow to drive the buffer shaft 4 to rotate in the sleeve ring 35. During the rotation, the rubber ring of the outer ring of the sleeve ring 35 buffers the shaft end. The corrosion-resistant buffer blade 5 is affected by the air pressure and driven by centrifugal force during high-speed rotation. The centrifugal scraper frame 6 on it is moved to move, and the centrifugal scraper frame 6 continuously reciprocates along the side of the anti-corrosion buffer blade 5, and the surface of the anti-corrosion buffer blade 5 is scraped and cleaned during the movement, thereby avoiding the problem of corrosion of the anti-corrosion buffer blade 5 due to residual particles in the gas, and improving the corrosion resistance of the anti-corrosion buffer blade 5 itself. The anti-corrosion buffer blade 5 buffers the gas, which can reduce the direct corrosion of the corrosive substances in the gas to the valve core and the inner wall of the valve shell, thereby achieving the effect of increasing the corrosion resistance of the valve core and the inner wall of the valve shell. At the same time, in order to avoid the high pressure of the gas impacting the anti-corrosion buffer blade 5 and causing it to be damaged as a whole, the sleeve shaft 34 is set to use the spring to perform elastic restriction on the U-shaped connecting rod 33, so that the anti-corrosion buffer blade 5 as a whole can be elastically adjusted and adapted according to the gas pressure it is subjected to, thereby improving the working life of the anti-corrosion buffer blade 5.

[0031] At the same time, when the U-shaped connecting rod 33 needs to be disassembled, the turning handle rod 38 is moved away from the clamping plate 36, and the turning handle rod 38 is directly rotated after it is completely separated from the clamping effect of the two clamping plates 36. The turning handle rod 38 drives the screw shaft 32 to rotate through the mutual cooperation between the limit sleeve 37 and the slider and the limit groove. The screw shaft 32 achieves the effect of threaded disassembly by rotation, and then achieves the effect of disassembling the U-shaped connecting rod 33 connected to the screw shaft 32 from the fixed screw seat 31 as a whole, thereby achieving the purpose of facilitating disassembly and replacement.

[0032] The above implementation methods are only used to illustrate the embodiments of the present utility model, and are not limitations of the embodiments of the present utility model. Ordinary technicians in the relevant technical field can make various changes and modifications without departing from the spirit and scope of the embodiments of the present utility model. Therefore, all equivalent technical solutions also belong to the scope of the embodiments of the present utility model. The patent protection scope of the embodiments of the present utility model should be limited by the claims.

Claims

1. A corrosion-resistant EGR valve housing, comprising a valve body (1), characterized in that: The air inlet end of the valve body (1) is connected to an anti-corrosion base (2), an end of the anti-corrosion base (2) away from the valve body (1) is provided with a mounting groove, the interior of the anti-corrosion base (2) is connected to a buffer shaft (4) via a detachable mounting device (3), the surface of the buffer shaft (4) is fixedly connected to an anti-corrosion buffer blade (5), and the surface of the anti-corrosion buffer blade (5) is slidably connected to a centrifugal scraper frame (6).

2. The corrosion-resistant EGR valve housing according to claim 1, characterized in that: The corrosion-resistant buffer blade (5) is fixedly connected to a convex edge on one side away from the buffer shaft (4), and the centrifugal scraper frame (6) is respectively connected to buffer gaskets on both sides close to the buffer shaft (4) and the convex edge.

3. The corrosion-resistant EGR valve housing according to claim 1, characterized in that: The detachable mounting device (3) comprises a fixed screw seat (31), one end of which is fixedly connected to the inside of the anti-corrosion base (2), the internal thread of the fixed screw seat (31) is connected to a screw shaft (32), one end of the screw shaft (32) away from the fixed screw seat (31) is rotatably connected to a U-shaped connecting rod (33), and the end of the U-shaped connecting rod (33) is elastically connected to a sleeve shaft (34) via a spring.

4. The corrosion-resistant EGR valve housing according to claim 3, characterized in that: The inner wall of the sleeve shaft (34) is slidably connected to the surface of the U-shaped connecting rod (33); one end of the sleeve shaft (34) away from the U-shaped connecting rod (33) is fixedly connected to a sleeve ring (35) via a rubber ring; the interior of the sleeve ring (35) is rotatably connected to the end of the buffer shaft (4).

5. The corrosion-resistant EGR valve housing according to claim 4, characterized in that: A clamping plate (36) is fixedly connected to the fixing screw seat (31), the number of the clamping plates (36) is set to two, and the two clamping plates (36) are symmetrically distributed with the center line of the fixing screw seat (31) as the symmetry axis.

6. The corrosion-resistant EGR valve housing according to claim 5, characterized in that: A limiting groove is provided on the surface of the screw shaft (32), the interior of the limiting groove is slidably connected to a limiting sleeve (37) via a slider, and a turning handle rod (38) is fixedly connected to the limiting sleeve (37).

7. The corrosion-resistant EGR valve housing according to claim 6, characterized in that: The limiting sleeve (37) is sleeved on the screw shaft (32), and the surface of the turning handle rod (38) is clamped between the two clamping plates (36).

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