EGR (Exhaust Gas Recirculation) valve capable of adjusting vacuum degree

Abstract

The utility model discloses an EGR (exhaust gas recirculation) valve capable of adjusting vacuum degree, which belongs to the technical field of EGR valves, one end of a valve pipe is fixedly communicated with a valve cover, the surface of the valve cover is fixedly sleeved with a vacuum inlet pipe, the middle position of the valve cover is fixedly communicated with a vacuum degree adjusting seat, the bottom of the vacuum degree adjusting seat is provided with a communicating hole, one end of the communicating hole is fixedly communicated with an adjusting groove, and the other end of the communicating hole is fixedly communicated with a vacuum inlet pipe. According to the EGR valve capable of adjusting the vacuum degree, through the arrangement of the adjusting rod, the supporting spring and the limiting rod, the vacuum degree can be stably adjusted, meanwhile, the adjusting position can be rapidly determined through scale marks, and the EGR valve capable of adjusting the vacuum degree is convenient to use. And through the arranged clamping blocks and clamping grooves formed in the limiting rods, the adjusting position of the adjusting plate can be rapidly positioned, and the situation that the adjusting plate automatically moves due to vibration is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to EGR valve technical field more specifically, relate to a kind of EGR valve of adjustable vacuum degree. BACKGROUND

[0002] EGR valve is used for the control valve of exhaust gas recirculation, by guiding exhaust gas into combustion chamber, to reduce engine combustion peak, to achieve the purpose of reducing nitrogen oxides in exhaust gas.

[0003] At present, the adjusting vacuum degree component of common EGR valve cannot quickly and accurately control its adjusting position when adjusting vacuum degree, and it may be moved due to vibration force during use, for example, the EGR valve body disclosed in the publication No.CN217950551U includes a valve pipe, an inlet flange is arranged at the lower end of the delivery valve pipe, an outlet flange is arranged at the lower side of the front end of the valve pipe, a delivery port is penetrated forward in the inside of the front end of the outlet flange, a sealing device is arranged at the front end of the outlet flange, the sealing device includes a gasket, an outer sealing ring, a through hole, a limiting pipe, a sealing snap ring, a sealing slot and an outer sealing groove, and the gasket is arranged at the front end of the outlet flange.

[0004] From the above-mentioned disclosure, it can be known that the adjusting knob and the screw rod are used to control the movement of the separation disc to adjust the vacuum degree, but the movement position of the separation disc cannot be directly observed during adjustment, which affects the adjustment efficiency and accuracy, and the screw rod may automatically rotate under the action of vibration force, which causes the movement of the separation disc. SUMMARY

[0005] In view of the problems existing in the prior art, the purpose of the utility model is to provide an EGR valve with adjustable vacuum degree, which can stably adjust the vacuum degree through the adjusting rod, supporting spring and limiting rod, and quickly determine the adjusting position through the scale line, improve the adjusting accuracy, and quickly position the adjusting position of the adjusting plate through the clamping block and the clamping slot arranged on the limiting rod, to avoid the automatic movement of the adjusting plate due to vibration.

[0006] To solve the above problems, the utility model adopts the following technical solutions.

[0007] The adjustable vacuum EGR valve, including valve pipe, one end of the valve pipe is fixedly connected with valve cover, the surface of the valve cover is fixedly sleeved with vacuum inlet pipe, the middle position of the valve cover is fixedly connected with vacuum degree adjusting seat, the bottom of the vacuum degree adjusting seat is provided with communication hole, one end of the communication hole is fixedly connected with adjusting groove, the inner wall of the adjusting groove is movably connected with adjusting mechanism, the surface of the vacuum degree adjusting seat is provided with sliding hole, one end of the sliding hole is fixedly connected with limiting mechanism, the surface of the limiting mechanism is slidably connected with limiting rod, the adjustable vacuum EGR valve, through the adjusting rod, supporting spring and limiting rod, can stably adjust the vacuum degree, and through the scale line, the adjusting position can be quickly determined, the adjusting accuracy is improved, and through the clamping block and the clamping groove of the limiting rod, the adjusting position of the adjusting plate can be quickly positioned, and the automatic movement of the adjusting plate caused by vibration is avoided.

[0008] Further, the adjusting mechanism includes an adjusting rod, the surface of the adjusting rod is threadedly connected with the surface of the vacuum degree adjusting seat, one end of the adjusting rod is fixedly connected with a knob, and the other end of the adjusting rod is rotatably connected with an adjusting plate through a bearing.

[0009] Further, the limiting mechanism includes a limiting box, the bottom of the limiting box is fixedly connected with the surface of the vacuum degree adjusting seat, the surface of the limiting box is provided with a guide groove, the guide groove is coaxial with the sliding hole, and the inner walls of the guide groove and the sliding hole are slidably connected with the surface of the limiting rod, so that the limiting rod can stably move up and down.

[0010] Further, the inner wall of the adjusting groove is fixedly connected with a plurality of positioning rods which are equally distributed in a ring shape, the surface of the positioning rod is fixedly sleeved with a supporting spring, one end of the supporting spring is movably connected with the bottom of the adjusting plate, and the supporting spring can support the adjusting plate through the elastic force, so that the adjusting rod cannot automatically rotate due to external force.

[0011] Further, the inner wall of the limiting box is slidably connected with a clamping block, one end of the clamping block is fixedly connected with a connecting rod, the outer side of the connecting rod is sleeved with a compression spring, one end of the connecting rod is fixedly connected with an anti-skid cap, and one end of the clamping block is clamped with the clamping groove, so that the adjusting position of the limiting rod can be fixed.

[0012] Further, one end of the limiting rod is fixedly connected with the surface of the adjusting plate, the surface of the limiting rod is provided with a scale line, and the side surface of the limiting rod is provided with a clamping groove, and the clamping groove is V-shaped, so as to be clamped with one end of the clamping block.

[0013] Further, the side edge of the adjusting plate is provided with an annular groove, an inner wall of the annular groove is detachably connected with a sealing ring, a surface of the sealing ring is in sliding connection with the inner wall of the adjusting groove, and the sealing ring can ensure the sealing property of the connecting position of the adjusting plate and the adjusting groove.

[0014] Compared with the prior art, the vacuum degree adjusting seat has the advantages that:

[0015] (1) The adjusting rod, the supporting spring and the limiting rod are arranged, the vacuum degree can be stably adjusted, the adjusting position can be quickly determined through the scale line, and the adjusting accuracy is improved.

[0016] (2) The clamping block and the clamping groove arranged in the limiting rod are arranged, the adjusting position of the adjusting plate can be quickly positioned, and the automatic movement of the adjusting plate due to vibration is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole structure schematic view of the utility model;

[0018] Figure 2 It is a vacuum degree adjusting seat structure sectional view of the utility model;

[0019] Figure 3 It is an adjusting mechanism structure schematic view of the utility model;

[0020] Figure 4 It is a limiting mechanism structure schematic view of the utility model;

[0021] Figure 5 It is Figure 4 The anti-skid cap and clamping block installation structure schematic view of the utility model.

[0022] Mark number explanation in the drawing:

[0023] 1, valve pipe; 2, valve cover; 3, vacuum inlet pipe; 4, vacuum degree adjusting seat; 41, communicating hole; 42, adjusting groove; 43, positioning rod; 44, supporting spring; 45, sliding hole; 5, adjusting mechanism; 51, adjusting rod; 52, knob; 53, bearing; 54, adjusting plate; 55, sealing ring; 56, limiting rod; 57, clamping groove; 58, scale line; 6, limiting mechanism; 61, limiting box; 62, guide groove; 63, clamping block; 64, connecting rod; 65, extrusion spring; 66, anti-skid cap. DETAILED DESCRIPTION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of the present application.

[0025] Embodiment 1: Please refer to Figures 1-5 The adjustable vacuum EGR valve changes the size of the vacuum chamber to change the vacuum degree of the vacuum chamber, comprising a valve pipe 1, the valve pipe 1 is further provided with an inlet flange and an outlet flange for connecting with the exhaust manifold and the intake manifold, which belongs to the prior art, one end of the valve pipe 1 is fixedly connected with a valve cover 2, the valve cover 2 is internally provided with a vacuum chamber, and is in communication with the valve pipe 1 and the inside of an adjusting groove 42, the surface of the valve cover 2 is fixedly sleeved with a vacuum inlet pipe 3, one end of the vacuum inlet pipe 3 is in communication with the vacuum chamber, the middle position of the valve cover 2 is fixedly connected with a vacuum degree adjusting seat 4, the bottom of the vacuum degree adjusting seat 4 is provided with a communication hole 41, one end of the communication hole 41 is fixedly connected with the adjusting groove 42, the inner wall of the adjusting groove 42 is movably connected with an adjusting mechanism 5, the adjusting mechanism 5 comprises an adjusting rod 51, the surface of the adjusting rod 51 is threadedly connected with the surface of the vacuum degree adjusting seat 4, one end of the adjusting rod 51 is fixedly connected with a knob 52, the other end of the adjusting rod 51 is rotatably connected with an adjusting plate 54 through a bearing 53, the adjusting plate 54 can move up and down under the control of the adjusting rod 51, thereby adjusting the space in the valve cover 2 and adjusting the vacuum degree, the surface of the vacuum degree adjusting seat 4 is provided with a sliding hole 45, one end of the sliding hole 45 is fixedly connected with a limiting mechanism 6, the limiting mechanism 6 comprises a limiting box 61, the bottom of the limiting box 61 is fixedly connected with the surface of the vacuum degree adjusting seat 4, the surface of the limiting box 61 is provided with a guide groove 62, the guide groove 62 is coaxial with the sliding hole 45, the inner wall of the guide groove 62 and the sliding hole 45 is slidably connected with the surface of a limiting rod 56, which has a guiding effect and facilitates the stable up-and-down movement of the limiting rod 56, and the surface of the limiting mechanism 6 is slidably connected with the limiting rod 56.

[0026] The inner wall of the adjusting groove 42 is fixedly connected with annular equidistantly distributed positioning rods 43, the surface of the positioning rods 43 is fixedly sleeved with supporting springs 44, one end of the supporting springs 44 is movably connected with the bottom of the adjusting plate 54, the supporting springs 44 can support the adjusting plate 54 through the elastic force, so as to prevent the adjusting rod 51 from automatically rotating due to external force, the inner wall of the limiting box 61 is slidably connected with a clamping block 63, one end of the clamping block 63 is fixedly connected with a connecting rod 64, the outer side of the connecting rod 64 is sleeved with a pressing spring 65, one end of the connecting rod 64 is fixedly connected with an anti-skid cap 66, and one end of the clamping block 63 is clamped with a clamping groove 57, so as to fix the adjusting position of the limiting rod 56.

[0027] One end of the limiting rod 56 is fixedly connected with the surface of the adjusting plate 54, the surface of the limiting rod 56 is provided with a scale line 58, the side surface of the limiting rod 56 is provided with a clamping groove 57, the clamping groove 57 is V-shaped, the clamping groove 57 is convenient for clamping one end of the clamping block 63, the side edge of the adjusting plate 54 is provided with an annular groove, the inner wall of the annular groove is detachably connected with a sealing ring 55, the surface of the sealing ring 55 is slidably connected with the inner wall of the adjusting groove 42, and the sealing ring 55 can guarantee the sealing property of the connecting position of the adjusting plate 54 and the adjusting groove 42.

[0028] When the vacuum degree of the EGR valve is adjusted, the anti-skid cap 66 is first pulled to the left by hand, so that the clamping block 63 moves to the left and is separated from the clamping groove 57, so that the limiting rod 56 can be freely moved up and down, then the adjusting rod 51 is manually rotated, the adjusting rod 51 is clockwise rotated, so that the adjusting plate 54 is driven to move upward, the adjusting rod 51 is counterclockwise rotated, so that the adjusting plate 54 is driven to move downward, the adjusting plate 54 moves upward or downward, so that the limiting rod 56 moves upward or downward, when the adjusting plate 54 is adjusted to the appropriate position according to the scale line 58, the anti-skid cap 66 is loosened, so that the clamping block 63 is moved to the right under the elastic force of the compression spring 65 and is clamped with the corresponding clamping groove 57, so that the adjusting position of the adjusting plate 54 is fixed, the adjusting plate 54 is moved upward, so that the space of the vacuum chamber is increased, the adjusting plate 54 is moved downward, so that the space of the vacuum chamber is reduced, so that the purpose of adjusting the vacuum degree is achieved, the adjusting rod 51, the supporting spring 44 and the limiting rod 56 are arranged, so that the vacuum degree can be stably adjusted, the scale line 58 can be used to quickly determine the adjusting position, the adjusting precision is improved, the clamping block 63 and the clamping groove 57 of the limiting rod 56 are arranged, so that the adjusting position of the adjusting plate 54 can be quickly positioned, and the automatic movement of the adjusting plate 54 caused by vibration is avoided.

[0029] The above merely describes a preferred embodiment of the present application; however, the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical scheme of the present application and the improvement concept thereof within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An EGR valve with adjustable vacuum, comprising a valve tube (1), characterized in that: One end of the valve pipe (1) is fixedly connected with a valve cover (2), the surface of the valve cover (2) is fixedly sleeved with a vacuum inlet pipe (3), the middle position of the valve cover (2) is fixedly connected with a vacuum degree adjusting seat (4), the bottom of the vacuum degree adjusting seat (4) is provided with a communication hole (41), one end of the communication hole (41) is fixedly connected with an adjusting groove (42), the inner wall of the adjusting groove (42) is movably connected with an adjusting mechanism (5), the surface of the vacuum degree adjusting seat (4) is provided with a sliding hole (45), one end of the sliding hole (45) is fixedly connected with a limiting mechanism (6), the surface of the limiting mechanism (6) is slidably connected with a limiting rod (56).

2. The adjustable vacuum EGR valve of claim 1, wherein: The adjusting mechanism (5) comprises an adjusting rod (51), the surface of the adjusting rod (51) is threadedly connected with the surface of the vacuum degree adjusting seat (4), one end of the adjusting rod (51) is fixedly connected with a knob (52), the other end of the adjusting rod (51) is rotatably connected with an adjusting plate (54) through a bearing (53).

3. The adjustable vacuum EGR valve of claim 1, wherein: The limiting mechanism (6) comprises a limiting box (61), the bottom of the limiting box (61) is fixedly connected with the surface of the vacuum degree adjusting seat (4), the surface of the limiting box (61) is provided with a guide groove (62), the guide groove (62) is coaxial with the sliding hole (45).

4. The variable vacuum EGR valve of claim 2, wherein: The inner wall of the adjusting groove (42) is fixedly connected with annular equidistantly distributed positioning rods (43), the surface of the positioning rod (43) is fixedly sleeved with a supporting spring (44), one end of the supporting spring (44) is movably connected with the bottom of the adjusting plate (54).

5. The variable vacuum EGR valve of claim 3, wherein: The inner wall of the limiting box (61) is slidably connected with a clamping block (63), one end of the clamping block (63) is fixedly connected with a connecting rod (64), the outer side of the connecting rod (64) is sleeved with a compression spring (65), one end of the connecting rod (64) is fixedly connected with an anti-skid cap (66).

6. The variable vacuum EGR valve of claim 2, wherein: One end of the limiting rod (56) is fixedly connected with the surface of the adjusting plate (54), the surface of the limiting rod (56) is provided with a scale line (58), the side surface of the limiting rod (56) is provided with a clamping groove (57).

7. The variable vacuum EGR valve of claim 2, wherein: The side edge of the adjusting plate (54) is provided with an annular groove, the inner wall of the annular groove is detachably connected with a sealing ring (55), the surface of the sealing ring (55) is slidably connected with the inner wall of the adjusting groove (42).

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