CN211423662U

CN211423662U - EGR valve body structure

Info

Publication number: CN211423662U
Application number: CN201922202890.5U
Authority: CN
Inventors: 高原
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Fengrui Engine Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Fengrui Engine Co Ltd
Priority date: 2019-12-10
Filing date: 2019-12-10
Publication date: 2020-09-04
Anticipated expiration: 2029-12-10

Abstract

The utility model provides a EGR valve body structure belongs to engine technical field. It has solved the current problem that unloading inner tube and rotation type unloading outer tube rotated the difficulty. This EGR valve body structure, including the intake pipe, establish the outer tube outside the inner tube including with the inner tube and the cover of intake pipe intercommunication, at least one venthole one has been seted up on the inner tube, at least one venthole two has been seted up on the outer tube, outer tube and inner tube can make venthole one and two intercommunications of venthole along circumference relative rotation, the one end of inner tube is located the outer tube, and this end has the portion of stepping down that the external diameter contracts to the inside, it holds the chamber to form between the lateral wall of the portion of stepping down and the inside wall of outer tube, the bottom of the portion of stepping down has along the bellied support ring of the portion of stepping down circumference, have between support ring and the outer. This EGR valve body structure makes EGR valve body structure use more smoothly when guaranteeing the valve gas tightness.

Description

EGR valve body structure

Technical Field

The utility model belongs to the technical field of the engine, a EGR valve body structure is related to.

Background

EGR systems (exhaust gas recirculation) are becoming more widely used, and EGR valve bodies are used to introduce exhaust gas and to control the flow of exhaust gas, while ensuring sealing to ensure that exhaust gas does not leak out.

The structure of the existing mainstream EGR valve body is mostly a 'valve-like' structure and a 'butterfly valve' structure, which causes the problems of more parts of the whole EGR valve body structure and inconvenient assembly and maintenance, but has a simpler valve structure in other fields, for example, Chinese patent application (patent application No. 201220222452.0) discloses a feeding device of a rotary material layer adjusting preheater, which is arranged between a storage bin and the preheater and comprises a feeding inner tube, a circular inner tube, the upper end of the feeding inner tube is connected with the bottom of the storage bin, a rotary feeding tube and a circular inner tube are movably sleeved outside the feeding inner tube, a gear is sleeved on the upper part of the rotary feeding tube, a through hole or more than two through holes with different heights are arranged on the wall of the rotary feeding tube, the through holes are staggered up and down, left and right, a feeding outer tube, the circular lower part of the feeding inner tube is connected with the top of a shell of the, at least one discharge hole is formed in the height direction of one side of the wall of the discharging outer pipe, and the position of each discharge hole in the height direction corresponds to the position of a through hole of the rotary discharging pipe.

Above-mentioned structure is comparatively simple also can realize control flap's switching degree, but because its unloading inner tube is the circular structure of straight section of thick bamboo, and in order to guarantee the gas tightness of valve, be the vacuum state between rotation type unloading outer tube and the unloading outer tube this moment, the gas tightness of valve has been improved, but because control flap's switching degree makes between unloading outer tube and the rotation type unloading outer tube and can produce relative displacement through rotating rotation type unloading outer tube, but because the vacuum setting between unloading outer tube and the rotation type unloading outer tube, it is comparatively difficult to lead to the rotation between unloading outer tube and the rotation type unloading outer tube, the use of valve has been influenced. And the conventional technical means in this field adopts to increase lubricating oil between unloading outer tube and rotation type unloading outer tube usually, and lubricating oil can not only play lubricated effect, can also form the oil blanket, avoids waste gas or material to flow out from between through-hole and the discharge opening, also can guarantee the leakproofness between unloading outer tube and the rotation type unloading outer tube for the relative rotation of unloading inner tube and rotation type unloading outer tube is more convenient and easy.

And one end of the inner tube inserted into the outer tube is provided with a relief part, the outer diameter of the relief part is contracted inwards, a larger space is arranged between the outer side wall of the relief part and the inner side wall of the outer tube, although this arrangement results in smoother rotation between the inner and outer tubes, during installation, more air remains in the space, which affects the air tightness between the inner pipe and the outer pipe, therefore, in order to ensure the air tightness between the inner pipe and the outer pipe, the space between the inner pipe and the outer pipe is reserved to be minimum, and the inner pipe and the outer pipe are still in a state of being close to vacuum, so that the rotation between the inner pipe and the outer pipe is difficult, the air tightness between the inner pipe and the outer pipe cannot be ensured, the rotation between the inner pipe and the outer pipe is fast and smooth, it is not usual for those skilled in the art to adopt the above-described structure of the inner pipe to be installed with the outer pipe.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided an EGR valve body structure, the utility model aims to solve the technical problem that: how to solve the poor and inner tube of current EGR valve structure gas tightness and outer tube rotation problem not smooth and easy.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a EGR valve body structure, includes the intake pipe, establishes the outer tube of outside of tubes including inner tube and the cover of intake pipe intercommunication, at least one venthole one has been seted up on the inner tube, at least one venthole two has been seted up on the outer tube, outer tube and inner tube can make venthole one and two intercommunications of venthole along circumference relative rotation, the one end of inner tube is located the outer tube, its characterized in that, and this end has the portion of stepping down that the external diameter contracts to the internal, it holds the chamber to form between the lateral wall of the portion of stepping down and the inside wall of outer tube, the bottom of the portion of stepping down has along the bellied support ring of the portion of stepping down circumference, have between support ring and the outer tube and hold the clearance.

The working principle is as follows: the exhaust gas is discharged into the inner pipe by the air inlet pipe, the outer pipe is sleeved on the inner pipe at the moment, the air outlet hole I is arranged on the inner pipe, the air outlet hole II is arranged on the outer pipe, after relative displacement is generated in the circumferential direction between the outer pipe and the inner pipe, the air outlet hole I is communicated with the air outlet hole II, the part communicated with the air outlet hole I and the air outlet hole II can be further communicated with the outside and the inner cavity of the inner pipe at the moment, so that the exhaust gas in the inner pipe is discharged, the containing part with the outer diameter contracted inwards is arranged, the containing cavity is formed between the outer side wall of the containing part and the inner side wall of the outer pipe, residual air is arranged in the containing cavity during installation, the outer pipe and the inner pipe are not arranged in a vacuum mode, the relative rotation between the outer pipe and the inner pipe is more convenient, the contact area between the inner pipe and the outer pipe is also reduced, the, the working efficiency of the EGR valve body structure is improved; the support ring increases the contact area with the bottom of the outer pipe, further prevents waste gas of the inner pipe from flowing into the outer pipe from the bottom of the support ring, can improve the connection stability between the inner pipe and the outer pipe, enables the inner pipe to be stably arranged in the outer pipe, can improve the air tightness between the inner pipe and the outer pipe, and avoids the waste gas in the inner pipe from flowing into the outer pipe from the bottom of the inner pipe; have between support ring and the outer tube and hold the clearance of chamber UNICOM, can reserve more spaces for setting up the air that holds the chamber for rotation between inner tube and the outer tube is more convenient, further promotion EGR valve body structure's work efficiency, and then let position portion, support ring, hold the setting in chamber and clearance through the aforesaid, can make EGR valve body structure's work efficiency obtain promoting when guaranteeing the valve gas tightness.

In foretell EGR valve body structure, the one end of outer tube is equipped with the base, still be equipped with sealed the pad in the outer tube, sealed pad setting is between base and support ring, base and support ring link firmly, the terminal surface of support ring laminates with sealed terminal surface of filling up mutually.

By additionally arranging the base, the inner pipe can be embedded into the outer pipe firstly in the process of installing the outer pipe and the inner pipe, then the base is arranged at one end of the outer pipe, and the base is fixedly connected with the support ring through a fastener or other connecting pieces, so that certain air is ensured to be arranged between the yielding part of the inner pipe and the outer pipe, the air is not in a completely sealed state, the relative rotation between the inner pipe and the outer pipe is smoother, the installation is more convenient, and the working efficiency of the EGR valve body structure is improved; and the setting of sealed pad has increased the gas tightness between inner tube and the outer tube to can realize making the work efficiency of EGR valve body structure obtain promoting when guaranteeing the valve gas tightness.

In the EGR valve body structure, a first sealing ring is arranged between the base and the outer pipe.

The setting of this structure, the gas tightness between reinforcing outer tube and the external world, further improvement the gas tightness of whole EGR valve body structure.

In the EGR valve structure, the base has a baffle ring, and the baffle ring is located outside the outer pipe.

The setting of this structure for the assembly between outer tube and the base is more quick, and keep off the ring and can play certain spacing effect of blockking, can avoid the gap entering outer tube that outside air passes through outer tube and base in, influences the gas tightness between the inside and outside pipe, has promoted the gas tightness of EGR valve body structure.

In the EGR valve body structure, a limiting boss is arranged at one end of the inner tube, which is located outside the outer tube, and one end of the outer tube, which is far away from the base, is abutted against the limiting boss.

The one end of base was kept away from to the outer tube in the inner tube embedding outer tube offsets with spacing boss and leans on, assembles the condition that targets in place between outer tube and the inner tube this moment, has avoided the inner tube to appear passing at the in-process of wearing to establish, also can make things convenient for being connected between inner tube and the outer tube, has improved the convenience and the stability of EGR valve body structural installation.

In the EGR valve body structure, an external gear is disposed on a side wall of one end of the outer tube away from the base.

The outer pipe can be directly driven by the motor worm with the gear, and the outer gear of the outer pipe is meshed with the gear on the motor worm at the moment, so that the opening and closing of the outer pipe air outlet two and the inner pipe air outlet one are realized, the EGR valve body structure is more convenient to adjust, and the work efficiency of the EGR valve body structure is improved.

In the EGR valve body structure, one end of the limiting boss close to the outer pipe is provided with a sealing step, one end of the outer pipe close to the limiting boss protrudes outwards to form a sealing part, the sealing step is located in the sealing part, and a sealing ring II is arranged between the sealing step and the sealing part.

The sealing step and the sealing part are arranged, so that the other end of the outer pipe is more stably connected with the inner pipe, a second sealing ring is arranged between the sealing step and the sealing part, and the air tightness of the inner pipe and the outer pipe is improved.

In the EGR valve body structure described above, a gap is provided between the seal portion and the inner pipe.

The setting of this structure for the other end of outer tube also has a little air and remains, thereby the relative rotation of outer tube and inner tube is convenient more and smooth and easy, further improvement the work efficiency of EGR valve body structure.

In foretell EGR valve body structure, venthole one is equipped with two, and two ventholes one distributes along inner tube length direction, venthole two is equipped with two, and two ventholes two distribute along outer tube length direction, venthole one sets up with two one-to-one in the venthole.

The setting of this structure, the coincidence of two ventholes one and two corresponding ventholes two of ability direct control for gas flow's regulation is more convenient, has improved the convenience that EGR valve body structure adjusted.

In the actual use process, the actual demand of accessible is to inner tube radial distribution along venthole one and venthole two, or the quantity of increase and decrease venthole one and venthole two to satisfy the regulation of gaseous outflow.

Compared with the prior art, this EGR valve body structure has following advantage:

1. by arranging the relief part and the support ring, a larger space is formed between the relief part and the outer pipe, and air remained during installation is contained in the space, so that the relative rotation of the outer pipe and the inner pipe is more convenient, and the working efficiency of the EGR valve body structure is improved; and the support ring has increased the area of contact with the outer tube bottom, and further the waste gas that has prevented the inner tube flows into in the outer tube from the bottom of support ring, can improve the stability of being connected between inner tube and the outer tube for the setting that the inner tube can be stable is in the outer tube, and can promote the gas tightness between inner tube and the outer tube.

2. The setting of base for installation between inner tube and the outer tube is more convenient, has also made things convenient for the installation of sealing washer one, has improved the gas tightness between inner tube and the outer tube.

Drawings

Fig. 1 is a schematic structural view of the EGR valve body structure after assembly.

Fig. 2 is a plan view of the EGR valve body structure after assembly.

Fig. 3 is a partial sectional view taken along a-a in fig. 2.

Fig. 4 is a partially enlarged view of a portion a in fig. 3.

FIG. 5 is a schematic view of the structure of the outer tube in the EGR valve body structure.

Fig. 6 is a schematic structural view of an inner tube in the present EGR valve body structure.

In the figure, 1, an air inlet pipe; 2. an inner tube; 21. a first air outlet; 22. a relief portion; 23. a support ring; 24. a gap; 25. a limiting boss; 26. sealing the step; 3. an outer tube; 31. a second air outlet; 32. a base; 321. a baffle ring; 33. a gasket; 34. an outer gear; 35. a sealing part; 4. a first sealing ring; 5. a second sealing ring; 6. a void; 7. a receiving cavity.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in FIG. 1, the EGR valve body structure comprises an air inlet pipe 1, an inner pipe 2 communicated with the air inlet pipe 1, and an outer pipe 3 sleeved outside the inner pipe 2.

Specifically, as shown in fig. 1 to 6, the inner tube 2 is provided with at least one first air outlet 21, the outer tube 3 is provided with at least one second air outlet 31, the outer tube 3 and the inner tube 2 can rotate relatively along the circumferential direction to communicate the first air outlet 21 with the second air outlet 31, one end of the inner tube 2 is located in the outer tube 3, and the end is provided with a yielding portion 22 that is radially and inwardly contracted, an accommodating cavity 7 is formed between the outer side wall of the yielding portion 22 and the inner side wall of the outer tube 3, the bottom of the yielding portion 22 is provided with a support ring 23 that is circumferentially protruded along the yielding portion 22, and a gap 24 that is communicated with the accommodating cavity 7 is formed between the support ring 23 and the outer tube 3.

The working principle is as follows: the exhaust gas is discharged into the inner pipe 2 by the air inlet pipe 1, the outer pipe 3 is sleeved on the inner pipe 2 at the moment, the first air outlet hole 21 is arranged on the inner pipe 2, the second air outlet hole 31 is arranged on the outer pipe 3, after relative displacement is generated in the circumferential direction through the outer pipe 3 and the inner pipe 2, the first air outlet hole 21 is communicated with the second air outlet hole 31, the part of the first air outlet hole 21 communicated with the second air outlet hole 31 can be communicated with the outside and the inner cavity of the inner pipe 2, the exhaust gas in the inner pipe 2 is discharged, the yielding part 22 with the radially inward contraction is arranged, the accommodating cavity 7 is formed between the outer side wall of the yielding part 22 and the inner side wall of the outer pipe 3, residual air is contained in the accommodating cavity 7 during installation, the relative rotation between the outer pipe 3 and the inner pipe 2 is not arranged in a vacuum manner, the relative rotation between the outer pipe 3 and the inner pipe 2 is more convenient, the contact area between the inner pipe, further, the relative rotation of the outer pipe 3 and the inner pipe 2 is more convenient, and the working efficiency of the EGR valve body structure is improved; the support ring 23 increases the contact area with the bottom of the outer tube 3, further prevents the waste gas of the inner tube 2 from flowing into the outer tube 3 from the bottom of the support ring 23, and can improve the stability of connection between the inner tube 2 and the outer tube 3, so that the inner tube 2 can be stably arranged in the outer tube 3, the air tightness between the inner tube 2 and the outer tube 3 can be improved, and the waste gas in the inner tube 2 is prevented from flowing into the outer tube 3 from the bottom of the inner tube 2; have between support ring 23 and the outer tube 3 and hold the clearance 24 of chamber 7 UNICOM, can reserve more spaces for the setting at the air that holds chamber 7 for the rotation between inner tube 2 and the outer tube 3 is more convenient, further promotion EGR valve body structure's work efficiency, and then let position portion 22, support ring 23, hold the setting of chamber 7 and clearance 24 through the aforesaid, can make EGR valve body structure's work efficiency obtain promoting when guaranteeing the valve gas tightness.

As shown in fig. 1 to 4, a base 32 is disposed at one end of the outer tube 3, a gasket 33 is further disposed in the outer tube 3, the gasket 33 is disposed between the base 32 and the support ring 23, the base 32 and the support ring 23 are fixedly connected, an end surface of the support ring 23 is attached to an end surface of the gasket 33, a first seal ring 4 is disposed between the base 32 and the outer tube 3, a stopper ring 321 is disposed on the base 32, and the stopper ring 321 is located outside the outer tube 3.

As shown in fig. 3-5, a limiting boss 25 is provided at one end of the inner tube 2 located outside the outer tube 3, one end of the outer tube 3 far from the base 32 abuts against the limiting boss 25, an outer gear 34 is provided on a side wall of one end of the outer tube 3 far from the base 32, a sealing step 26 is provided at one end of the limiting boss 25 close to the outer tube 3, one end of the outer tube 3 close to the limiting boss 25 protrudes outwards to form a sealing portion 35, the sealing step 26 is located in the sealing portion 35, a second sealing ring 5 is provided between the sealing step 26 and the sealing portion 35, and a gap 6 is provided between the sealing portion 35 and the inner.

As shown in fig. 5 and 6, two first air outlet holes 21 are provided, the two first air outlet holes 21 are distributed along the length direction of the inner tube 2, the two second air outlet holes 31 are provided, the two second air outlet holes 31 are distributed along the length direction of the outer tube 3, and the first air outlet holes 21 and the second air outlet holes 31 are arranged in a one-to-one correspondence manner.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. An EGR valve body structure comprises an air inlet pipe (1), an inner pipe (2) communicated with the air inlet pipe (1) and an outer pipe (3) sleeved outside the inner pipe (2), the inner tube (2) is provided with at least one first air outlet (21), the outer tube (3) is provided with at least one second air outlet (31), the outer pipe (3) and the inner pipe (2) can relatively rotate along the circumferential direction to enable the air outlet hole I (21) to be communicated with the air outlet hole II (31), one end of the inner pipe (2) is positioned in the outer pipe (3), it is characterized in that the end is provided with a yielding part (22) which is contracted in the radial direction and the outer side wall of the yielding part (22) and the inner side wall of the outer tube (3) form a containing cavity (7), the bottom of the displacement part (22) is provided with a supporting ring (23) which is raised along the circumferential direction of the displacement part (22), a gap (24) communicated with the accommodating cavity (7) is arranged between the support ring (23) and the outer tube (3).

2. The EGR valve body structure according to claim 1, characterized in that a base (32) is arranged at one end of the outer pipe (3), a sealing gasket (33) is further arranged in the outer pipe (3), the sealing gasket (33) is arranged between the base (32) and the support ring (23), the base (32) is fixedly connected with the support ring (23), and the end surface of the support ring (23) is attached to the end surface of the sealing gasket (33).

3. An EGR valve body structure according to claim 2, wherein a first seal ring (4) is provided between the base (32) and the outer pipe (3).

4. EGR valve body structure according to claim 2, wherein the seat (32) has a stopper ring (321) thereon, the stopper ring (321) being located outside the outer pipe (3).

5. EGR valve body structure according to any of claims 2-4, characterized in that the end of the inner tube (2) outside the outer tube (3) has a limit boss (25), and the end of the outer tube (3) far away from the base (32) abuts against the limit boss (25).

6. EGR valve body structure according to any of claims 2-4, characterized in that the outer tube (3) is provided with an external gear (34) on the side wall of the end remote from the base (32).

7. The EGR valve body structure according to claim 5, characterized in that one end of the limit boss (25) close to the outer tube (3) is provided with a sealing step (26), one end of the outer tube (3) close to the limit boss (25) protrudes outwards to form a sealing part (35), the sealing step (26) is positioned in the sealing part (35), and a sealing ring II (5) is arranged between the sealing step (26) and the sealing part (35).

8. The EGR valve body structure according to claim 7, wherein a gap (6) is provided between the seal portion (35) and the inner pipe (2).

9. The EGR valve body structure according to any one of claims 1 to 4, wherein there are two first outlet holes (21), two first outlet holes (21) are distributed along the length direction of the inner pipe (2), two second outlet holes (31) are distributed along the length direction of the outer pipe (3), and the first outlet holes (21) and the second outlet holes (31) are arranged in one-to-one correspondence.