Speed regulating valve embedded with special-shaped O-shaped lining

Abstract

The speed regulating valve comprises a throttling body and a throttling sleeve, the throttling sleeve is nested in the throttling body to form a plurality of flow channels, the throttling sleeve is sleeved with the special-shaped O-shaped ring to isolate one flow channel, the special-shaped O-shaped ring is sleeved with a retainer for keeping the shape of the special-shaped O-shaped ring, and the retainer is sleeved with a retainer for keeping the shape of the special-shaped O-shaped ring. The special-shaped O-shaped joint is provided with a ring base connected to the throttling sleeve in a sleeving mode and a sealing wall arranged around the outer circle of the ring base by a circle, the sealing wall is provided with a plurality of reinforcing ribs, and the reinforcing ribs extend to the edge of the sealing wall from the ring base. According to the utility model, the reinforcing ribs are additionally arranged on the O-shaped ring, so that the obtained special-shaped O-shaped ring can reduce the flanging proportion when the O-shaped ring is arranged.

Description

Technical Field

[0001] The utility model relates to the technical field of speed regulating valves, in particular to a speed regulating valve with nested special-shaped O-shaped valves. Background Art

[0002] There are two main types of airtight structures of exhaust throttling speed regulating valves currently on the market:

[0003] 1. The O-ring is installed into the throttling sleeve and supported by the retainer to reduce the possibility of O-ring deformation, thereby playing the throttling sealing function of the product, such as Figure 2 As shown;

[0004] 2. Only O is installed into the throttling sleeve to play the throttling sealing function of the product, such as Figure 3 shown.

[0005] Depend on Figure 2 It can be seen that the main features of the retainer support O ring and its component throttling seal structure are: the retainer supports the O ring; the component is installed in the product as a whole to achieve throttling seal; the O ring and the throttling body have an interference fit: the A port is ventilated and the O ring has a sealing effect; but this structure has the following shortcomings: when the throttling sleeve assembly is installed in the throttling body, there is still a risk of flanging, resulting in sealing failure. The outer lip of the O ring is thin and is easily deformed when installed, resulting in sealing failure.

[0006] Depend on Figure 3 It can be seen that the main features of the throttling seal structure with only O-order inserted into the throttling sleeve and its components are: only O-order is inserted into the throttling body; the components are installed in the product as a whole to achieve throttling sealing. However, this structure has the following disadvantages: it is easy to deform without the support of the retainer and has a short service life; because the outer lip is thick, the B port is ventilated at low pressure and the flow rate is small; when the throttling sleeve assembly is installed in the product, there is a greater risk of flanging, resulting in sealing failure; the A port is ventilated, and the O-order has no retainer support, which may cause outward deformation, resulting in sealing failure;

[0007] Depend on Figure 2 and Figure 3 It can be seen that both the structure in which the retainer supports the O-ring to be installed in the throttling sleeve and the structure in which only the O-ring is installed in the throttling sleeve have the possibility of O-ring flanging and deformation, resulting in failure of the throttling seal of the product. Utility Model Content

[0008] The utility model solves the problem that a frame-supported O-ring has flanging or deformation when being installed into a throttling sleeve, and provides a speed regulating valve with nested special-shaped O-rings. By adding reinforcing ribs to the O-ring, the special-shaped O-ring obtained can reduce the flanging ratio when the O-ring is installed.

[0009] In order to achieve the above objectives, the following technical solutions are proposed:

[0010] A speed regulating valve with a nested special-shaped O-ring comprises a throttle body and a throttle sleeve, wherein the throttle sleeve is nested in the throttle body to form a plurality of flow channels, the throttle sleeve is sleeved with a special-shaped O-ring to isolate one of the flow channels, the special-shaped O-ring is sleeved with a retaining frame for retaining the shape of the special-shaped O-ring, the special-shaped O-ring is provided with a ring seat sleeved on the throttle sleeve and a sealing wall arranged around the outer circle of the ring seat, the sealing wall is provided with a plurality of reinforcing ribs, and the reinforcing ribs extend from the ring seat to the edge of the sealing wall.

[0011] The utility model includes a throttle body, a throttle sleeve, a retainer and a special-shaped O-ring. The throttle sleeve is rotatably nested in the throttle body and combined with the throttle body to form a plurality of flow channels. The retainer and the special-shaped O-ring are sleeved on the throttle sleeve to isolate one of the flow channels. The retainer is sleeved on the special-shaped O-ring to maintain the shape of the special-shaped O-ring. The special-shaped O-ring includes a ring seat and a sealing wall. The ring seat is used to be sleeved and fixed on the throttle sleeve. The sealing wall is arranged around the outer ring of the ring seat for a circle to fit with the inner wall of the throttle body to isolate the flow channel. The sealing wall is provided with a plurality of reinforcing ribs extending from the ring seat to the edge of the sealing wall. The reinforcing ribs are provided to avoid the possibility of flanging of the special-shaped O-ring during installation, thereby avoiding the occurrence of sealing failure due to flanging.

[0012] Preferably, the bottom and side walls of the throttling body are provided with flow holes, and the throttling sleeve is also provided with flow holes at positions corresponding to the bottom and side walls of the throttling body. The throttling sleeve rotates inside the throttling body, and a flow channel is formed when the throttling sleeve is opposite to the flow holes of the throttling body.

[0013] The throttle body of the utility model is provided with flow holes on the side wall and the bottom, and the throttle sleeve is provided with flow holes at positions corresponding to the side wall and the bottom of the throttle body, and the throttle sleeve can rotate inside the throttle body, and a flow channel is formed when the throttle body and the flow holes of the throttle sleeve are opposite to each other. In addition, the throttle body is rotated so that the overlapping area of ​​the throttle body and the flow holes of the throttle sleeve changes, thereby adjusting the flow rate.

[0014] Preferably, the cross-sectional shape of the sealing wall of the special-shaped O-ring is conical, and the sealing wall is interference fit with the inner wall of the throttling body.

[0015] The cross-sectional shape of the sealing wall of the special-shaped O-shaped ring of the utility model is a cone, so that the bottom edge of the sealing wall and the inner wall of the throttling body are interference-fitted to form an effective seal.

[0016] Preferably, a fixing wall is arranged around the inner ring of the ring seat of the special-shaped O-ring, the cross-section of the fixing wall is an inverted cone, and the fixing wall is interference fit with the throttling sleeve.

[0017] The ring seat of the special-shaped O-ring of the utility model is provided with a fixing wall, and the fixing wall is arranged around the inner circle of the ring seat, and its cross-sectional shape is an inverted cone, so that the bottom edge of the fixing wall and the throttling sleeve are interference fit, which serves to increase the friction between the fixing wall and the throttling sleeve to prevent the special-shaped O-ring from slipping when in use.

[0018] Preferably, the reinforcing rib portion is connected to the outer side wall of the fixed wall.

[0019] The reinforcing rib of the utility model is provided with a part connected to the outer side wall of the fixed wall, so that the reinforcing rib can simultaneously strengthen the connection strength between the ring seat and the sealing wall, the ring seat and the fixed wall, and the sealing wall and the fixed wall.

[0020] Preferably, the retaining frame is provided with a sleeve ring cover and a retaining wall vertically arranged on the outer circle of the sleeve ring cover, the inner wall shape of the retaining wall is consistent with the outer wall of the sealing wall of the special-shaped O-shaped order, and the inner wall of the retaining wall is in contact with the outer wall of the sealing wall.

[0021] The retainer of the utility model comprises a sleeve ring cover and a retaining wall, wherein the retaining wall is vertically arranged on the outer ring of the sleeve ring cover, and since the shape of the inner side wall of the retaining wall is consistent with the shape of the outer side wall of the sealing wall of the special-shaped O-shaped order, the inner side wall of the retaining wall can be closely fitted to the outer side wall of the sealing wall. The special-shaped O-shaped order is an elastic body, and the retainer is a rigid body. The retainer is fitted and sleeved on the special-shaped O-shaped order to maintain a certain shape of the special-shaped O-shaped order.

[0022] Preferably, a plurality of vertical ribs are provided on the outer side of the retaining wall, and the vertical ribs are provided with a portion protruding from the bottom edge of the retaining wall.

[0023] A plurality of vertical ribs are arranged on the outer side surface of the retaining wall of the utility model, and the vertical ribs are provided with a portion protruding from the bottom edge of the retaining wall. The vertical ribs have two functions: one is to strengthen the structural strength of the retaining frame, and the other is that the portion protruding from the bottom edge of the retaining wall is equivalent to forming a plurality of saw teeth, which can effectively maintain the shape of the retainer when the sealing wall is deformed.

[0024] Preferably, the outer ring diameter of the sleeve ring cover is 0.5mm to 1mm smaller than the inner wall diameter of the throttle body, and the outer ring diameter of the sleeve ring cover is 0.5mm to 1mm larger than the inner wall diameter of the throttle sleeve where it is sleeved.

[0025] The outer diameter of the sleeve ring cover of the utility model is 0.5mm to 1mm smaller than the inner diameter of the throttle body, and the outer diameter of the sleeve ring cover is 0.5mm to 1mm larger than the inner diameter of the throttle sleeve where it is sleeved. The purpose of this arrangement of the utility model is to facilitate the installation of the retainer.

[0026] The beneficial effects of the utility model are:

[0027] 1. Adding multiple ribs improves the rigidity of the O-ring, and reduces the flange ratio when the O-ring is installed;

[0028] 2. The outer wall of the non-full circle is thickened. When the B port is inlet, the O port can be closed quickly without affecting the air intake flow;

[0029] 3. Multiple ribs can be directly molded out with little cost increase. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an exploded view of the device structure of the utility model.

[0031] Figure 2 It is a schematic diagram of an implementation scheme of the prior art.

[0032] Figure 3 It is another schematic diagram of an implementation scheme of the prior art.

[0033] Figure 4 It is a cross-sectional view of the device structure of the utility model.

[0034] Figure 5 It is an enlarged cross-sectional view of the structure of the special-shaped O-ring of this embodiment.

[0035] Among them: 1. throttle body; 2. throttle sleeve; 3. retaining frame; 4. special-shaped O-ring; 31. sleeve ring cover; 32. retaining wall; 41. ring seat; 42. sealing wall; 43. fixing wall; 44. reinforcing ribs. DETAILED DESCRIPTION

[0036] Embodiment 1:

[0037] This embodiment proposes a speed regulating valve with nested special-shaped O-commands, referring to Figure 1 , including a throttle body 1, a throttle sleeve 2, a retainer 3 and a special-shaped O-ring 4. The throttle sleeve 2 is rotated and nested in the throttle body 1, and is combined with the throttle body 1 to form a plurality of flow channels. The retainer 3 and the special-shaped O-ring 4 are sleeved on the throttle sleeve 2 to isolate one of the flow channels. The retainer 3 is sleeved on the special-shaped O-ring 4 to maintain the shape of the special-shaped O-ring 4. Reference Figure 4 and Figure 5 The special-shaped O-ring 4 includes a ring seat 41 and a sealing wall 42. The ring seat 41 is used to be sleeved and fixed on the throttling sleeve 2. The sealing wall 42 is arranged around the outer circle of the ring seat 41 for fitting with the inner wall of the throttling body 1 to isolate the flow channel. The sealing wall 42 is provided with a plurality of reinforcing ribs 44 extending from the ring seat 41 to the edge of the sealing wall 42. The purpose of providing the reinforcing ribs 44 is to avoid the possibility of flanging during the installation of the special-shaped O-ring 4, thereby avoiding the occurrence of sealing failure due to flanging.

[0038] The throttle body 1 of the utility model is provided with flow holes on the side wall and the bottom, and the throttle sleeve 2 is provided with flow holes at positions corresponding to the side wall and the bottom of the throttle body 1. The throttle sleeve 2 can rotate inside the throttle body 1, and a flow channel is formed when the throttle body 1 and the flow holes of the throttle sleeve 2 are opposite. In addition, the throttle body 1 is rotated so that the overlapping area of ​​the flow holes of the throttle body 1 and the throttle sleeve 2 changes, thereby adjusting the flow rate.

[0039] The cross-sectional shape of the sealing wall 42 of the special-shaped O-ring 4 of the utility model is conical, so that the bottom edge of the sealing wall 42 is interference-fitted with the inner wall of the throttling body 1 to form an effective seal.

[0040] The retainer 3 of the utility model comprises a sleeve ring cover 31 and a retaining wall 32, wherein the retaining wall 32 is vertically arranged on the outer ring of the sleeve ring cover 31, and since the shape of the inner side wall of the retaining wall 32 is consistent with the shape of the outer side wall of the sealing wall 42 of the special-shaped O-ring 4, the inner side wall of the retaining wall 32 can be closely fitted to the outer side wall of the sealing wall 42. The special-shaped O-ring 4 is an elastic body, while the retainer 3 is a rigid body, and the retainer 3 is fitted and sleeved on the special-shaped O-ring 4 to maintain the shape of the special-shaped O-ring 4 to a certain extent.

[0041] A plurality of vertical ribs are provided on the outer side surface of the retaining wall 32 of the utility model, and the vertical ribs are provided with portions protruding from the bottom edge of the retaining wall 32. The vertical ribs have two functions: one is to strengthen the structural strength of the retaining frame 3, and the other is that the portions protruding from the bottom edge of the retaining wall 32 are equivalent to forming a plurality of serrations, which can effectively maintain the shape of the retainer when the sealing wall 42 is deformed.

[0042] The outer diameter of the sleeve ring cover 31 of the utility model is 0.5mm to 1mm smaller than the inner diameter of the throttle body 1, and the outer diameter of the sleeve ring cover 31 is 0.5mm to 1mm larger than the inner diameter of the throttle sleeve 2. The purpose of this arrangement of the utility model is to facilitate the installation of the retainer 3.

[0043] Therefore, the utility model has the following advantages:

[0044] 1. Adding multiple ribs improves the rigidity of the O-ring, and reduces the flange ratio when the O-ring is installed;

[0045] 2. The outer wall of the non-full circle is thickened. When the B port is inlet, the O port can be closed quickly without affecting the air intake flow;

[0046] 3. Multiple ribs can be directly molded out with little cost increase.

[0047] Embodiment 2:

[0048] This embodiment proposes a speed regulating valve with nested special-shaped O-order. On the basis of embodiment 1, the special-shaped O-order 4 is structurally improved. Figure 1, including a throttle body 1, a throttle sleeve 2, a retainer 3 and a special-shaped O-ring 4. The throttle sleeve 2 is rotated and nested in the throttle body 1, and is combined with the throttle body 1 to form a plurality of flow channels. The retainer 3 and the special-shaped O-ring 4 are sleeved on the throttle sleeve 2 to isolate one of the flow channels. The retainer 3 is sleeved on the special-shaped O-ring 4 to maintain the shape of the special-shaped O-ring 4. Reference Figure 4 and Figure 5 The special-shaped O-ring 4 includes a ring seat 41 and a sealing wall 42. The ring seat 41 is used to be sleeved and fixed on the throttling sleeve 2. The sealing wall 42 is arranged around the outer circle of the ring seat 41 for fitting with the inner wall of the throttling body 1 to isolate the flow channel. The sealing wall 42 is provided with a plurality of reinforcing ribs 44 extending from the ring seat 41 to the edge of the sealing wall 42. The purpose of providing the reinforcing ribs 44 is to avoid the possibility of flanging during the installation of the special-shaped O-ring 4, thereby avoiding the occurrence of sealing failure due to flanging.

[0049] The ring seat 41 of the special-shaped O-ring 4 of the utility model is provided with a fixing wall 43, and the fixing wall 43 is arranged around the inner circle of the ring seat 41, and its cross-sectional shape is an inverted cone, so that the bottom edge of the fixing wall 43 is interference fit with the throttling sleeve 2, which serves to increase the friction between the fixing wall 43 and the throttling sleeve 2 to prevent the special-shaped O-ring 4 from slipping when in use.

[0050] The throttle body 1 of the utility model is provided with flow holes on the side wall and the bottom, and the throttle sleeve 2 is provided with flow holes at positions corresponding to the side wall and the bottom of the throttle body 1. The throttle sleeve 2 can rotate inside the throttle body 1, and a flow channel is formed when the throttle body 1 and the flow holes of the throttle sleeve 2 are opposite. In addition, the throttle body 1 is rotated so that the overlapping area of ​​the flow holes of the throttle body 1 and the throttle sleeve 2 changes, thereby adjusting the flow rate.

[0051] The cross-sectional shape of the sealing wall 42 of the special-shaped O-ring 4 of the utility model is conical, so that the bottom edge of the sealing wall 42 is interference-fitted with the inner wall of the throttling body 1 to form an effective seal.

[0052] The retainer 3 of the utility model comprises a sleeve ring cover 31 and a retaining wall 32, wherein the retaining wall 32 is vertically arranged on the outer ring of the sleeve ring cover 31, and since the shape of the inner side wall of the retaining wall 32 is consistent with the shape of the outer side wall of the sealing wall 42 of the special-shaped O-ring 4, the inner side wall of the retaining wall 32 can be closely fitted to the outer side wall of the sealing wall 42. The special-shaped O-ring 4 is an elastic body, while the retainer 3 is a rigid body, and the retainer 3 is fitted and sleeved on the special-shaped O-ring 4 to maintain the shape of the special-shaped O-ring 4 to a certain extent.

[0053] A plurality of vertical ribs are provided on the outer side surface of the retaining wall 32 of the utility model, and the vertical ribs are provided with portions protruding from the bottom edge of the retaining wall 32. The vertical ribs have two functions: one is to strengthen the structural strength of the retaining frame 3, and the other is that the portions protruding from the bottom edge of the retaining wall 32 are equivalent to forming a plurality of serrations, which can effectively maintain the shape of the retainer when the sealing wall 42 is deformed.

[0054] The outer diameter of the sleeve ring cover 31 of the utility model is 0.5mm to 1mm smaller than the inner diameter of the throttle body 1, and the outer diameter of the sleeve ring cover 31 is 0.5mm to 1mm larger than the inner diameter of the throttle sleeve 2. The purpose of this arrangement of the utility model is to facilitate the installation of the retainer 3.

[0055] Therefore, the utility model has the following advantages:

[0056] 1. Adding multiple ribs improves the rigidity of the O-ring, and reduces the flange ratio when the O-ring is installed;

[0057] 2. The outer wall of the non-full circle is thickened. When the B port is inlet, the O port can be closed quickly without affecting the air intake flow;

[0058] 3. Multiple ribs can be directly molded out with little cost increase.

[0059] Embodiment 3:

[0060] This embodiment proposes a speed regulating valve with nested special-shaped O-order. On the basis of embodiment 2, the special-shaped O-order 4 is structurally improved. Figure 1 , including a throttle body 1, a throttle sleeve 2, a retainer 3 and a special-shaped O-ring 4. The throttle sleeve 2 is rotated and nested in the throttle body 1, and is combined with the throttle body 1 to form a plurality of flow channels. The retainer 3 and the special-shaped O-ring 4 are sleeved on the throttle sleeve 2 to isolate one of the flow channels. The retainer 3 is sleeved on the special-shaped O-ring 4 to maintain the shape of the special-shaped O-ring 4. Reference Figure 4 and Figure 5 The special-shaped O-ring 4 includes a ring seat 41 and a sealing wall 42. The ring seat 41 is used to be sleeved and fixed on the throttling sleeve 2. The sealing wall 42 is arranged around the outer circle of the ring seat 41 for fitting with the inner wall of the throttling body 1 to isolate the flow channel. The sealing wall 42 is provided with a plurality of reinforcing ribs 44 extending from the ring seat 41 to the edge of the sealing wall 42. The purpose of providing the reinforcing ribs 44 is to avoid the possibility of flanging during the installation of the special-shaped O-ring 4, thereby avoiding the occurrence of sealing failure due to flanging.

[0061] The ring seat 41 of the special-shaped O-ring 4 of the utility model is provided with a fixing wall 43, and the fixing wall 43 is arranged around the inner circle of the ring seat 41, and its cross-sectional shape is an inverted cone, so that the bottom edge of the fixing wall 43 is interference fit with the throttling sleeve 2, which serves to increase the friction between the fixing wall 43 and the throttling sleeve 2 to prevent the special-shaped O-ring 4 from slipping when in use.

[0062] The reinforcing rib 44 of the present invention is provided with a portion connected to the outer side wall of the fixing wall 43 , so that the reinforcing rib 44 can simultaneously strengthen the connection strength between the ring seat 41 and the sealing wall 42 , the ring seat 41 and the fixing wall 43 , and the sealing wall 42 and the fixing wall 43 .

[0063] The throttle body 1 of the utility model is provided with flow holes on the side wall and the bottom, and the throttle sleeve 2 is provided with flow holes at positions corresponding to the side wall and the bottom of the throttle body 1. The throttle sleeve 2 can rotate inside the throttle body 1, and a flow channel is formed when the throttle body 1 and the flow holes of the throttle sleeve 2 are opposite. In addition, the throttle body 1 is rotated so that the overlapping area of ​​the flow holes of the throttle body 1 and the throttle sleeve 2 changes, thereby adjusting the flow rate.

[0064] The cross-sectional shape of the sealing wall 42 of the special-shaped O-ring 4 of the utility model is conical, so that the bottom edge of the sealing wall 42 is interference-fitted with the inner wall of the throttling body 1 to form an effective seal.

[0065] The retainer 3 of the utility model comprises a sleeve ring cover 31 and a retaining wall 32, wherein the retaining wall 32 is vertically arranged on the outer ring of the sleeve ring cover 31, and since the shape of the inner side wall of the retaining wall 32 is consistent with the shape of the outer side wall of the sealing wall 42 of the special-shaped O-ring 4, the inner side wall of the retaining wall 32 can be closely fitted to the outer side wall of the sealing wall 42. The special-shaped O-ring 4 is an elastic body, while the retainer 3 is a rigid body, and the retainer 3 is fitted and sleeved on the special-shaped O-ring 4 to maintain the shape of the special-shaped O-ring 4 to a certain extent.

[0066] A plurality of vertical ribs are provided on the outer side surface of the retaining wall 32 of the utility model, and the vertical ribs are provided with portions protruding from the bottom edge of the retaining wall 32. The vertical ribs have two functions: one is to strengthen the structural strength of the retaining frame 3, and the other is that the portions protruding from the bottom edge of the retaining wall 32 are equivalent to forming a plurality of serrations, which can effectively maintain the shape of the retainer when the sealing wall 42 is deformed.

[0067] The outer diameter of the sleeve ring cover 31 of the utility model is 0.5mm to 1mm smaller than the inner diameter of the throttle body 1, and the outer diameter of the sleeve ring cover 31 is 0.5mm to 1mm larger than the inner diameter of the throttle sleeve 2. The purpose of this arrangement of the utility model is to facilitate the installation of the retainer 3.

[0068] Therefore, the utility model has the following advantages:

[0069] 1. Adding multiple ribs improves the rigidity of the O-ring, and reduces the flange ratio when the O-ring is installed;

[0070] 2. The outer wall of the non-full circle is thickened. When the B port is inlet, the O port can be closed quickly without affecting the air intake flow;

[0071] 3. Multiple ribs can be directly molded out with little cost increase.

Claims

1. A speed regulating valve with nested special-shaped O-shaped valve, characterized in that: The invention comprises a throttle body (1) and a throttle sleeve (2), wherein the throttle sleeve (2) is nested in the throttle body (1) to form a plurality of flow channels, the throttle sleeve (2) is sleeved with a special-shaped O-ring (4) to isolate one of the flow channels, the special-shaped O-ring (4) is sleeved with a retaining frame (3) for retaining the shape of the special-shaped O-ring (4), the special-shaped O-ring (4) is provided with a ring seat (41) sleeved on the throttle sleeve (2) and a sealing wall (42) arranged around the outer circle of the ring seat (41), the sealing wall (42) is provided with a plurality of reinforcing ribs (44), and the reinforcing ribs (44) extend from the ring seat (41) to the edge of the sealing wall (42).

2. A nested special-shaped O-shaped speed regulating valve according to claim 1, characterized in that: The bottom and side walls of the throttling body (1) are both provided with flow holes, and the throttling sleeve (2) is also provided with flow holes at positions corresponding to the bottom and side walls of the throttling body (1). The throttling sleeve (2) rotates inside the throttling body (1), and a flow channel is formed when the throttling sleeve (2) and the flow holes of the throttling body (1) are opposite.

3. A nested special-shaped O-shaped speed regulating valve according to claim 1, characterized in that: The sealing wall (42) of the special-shaped O-ring (4) has a conical cross-sectional shape, and the sealing wall (42) is interference-fitted with the inner wall of the throttling body (1).

4. The nested special-shaped O-shaped speed regulating valve according to claim 1 is characterized in that: A fixing wall (43) is arranged around the inner circle of the ring seat (41) of the special-shaped O-ring (4). The cross-section of the fixing wall (43) is an inverted cone. The fixing wall (43) is interference-fitted with the throttling sleeve (2).

5. A nested special-shaped O-shaped speed regulating valve according to claim 4, characterized in that: The reinforcing rib (44) is partially connected to the outer side wall of the fixed wall (43).

6. A nested special-shaped O-shaped speed regulating valve according to any one of claims 1 to 5, characterized in that: The retaining frame (3) is provided with a sleeve ring cover (31) and a retaining wall (32) vertically arranged on the outer circle of the sleeve ring cover (31); the inner wall shape of the retaining wall (32) is consistent with the outer wall of the sealing wall (42) of the special-shaped O-shaped order (4); the inner wall of the retaining wall (32) is in contact with the outer wall of the sealing wall (42).

7. A nested special-shaped O-shaped speed regulating valve according to claim 6, characterized in that: A plurality of vertical ribs are arranged on the outer side of the retaining wall (32), and the vertical ribs are arranged to partially protrude from the bottom edge of the retaining wall (32).

8. The nested special-shaped O-shaped speed regulating valve according to claim 6 is characterized in that: The outer ring diameter of the sleeve ring cover (31) is 0.5 mm to 1 mm smaller than the inner wall diameter of the throttle body (1), and the outer ring diameter of the sleeve ring cover (31) is 0.5 mm to 1 mm larger than the inner wall diameter of the throttle sleeve (2) where it is sleeved.

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