Bottom Sealing Structure of Butterfly Valve Body and Butterfly Valve

Abstract

The present invention discloses a bottom sealing structure for a butterfly water valve, comprising a valve body having a bottom plate at its bottom; a water valve mating member mounted on the bottom of the valve body and in close contact with the bottom plate; a plurality of corresponding flow holes being provided on each of the water valve mating member and the bottom plate; a sealing recess being provided on opposing surfaces of one of the water valve mating member and the bottom plate, surrounding the flow holes; a first sealing sidewall being provided inside the sealing recess and surrounding the flow holes; a sealing ring being provided in close contact with the outer side of the flow holes along the first sealing sidewall; and a sealing boss being provided on the other of the water valve mating member and the bottom plate, embedded in the sealing recess; a radial sealing space being formed between the second sealing sidewall of the sealing boss and the first sealing sidewall; the second sealing sidewall and the first sealing sidewall radially compressing the sealing ring. The present invention can solve the problem of increased valve core torque and the susceptibility to internal leakage caused by the axial sealing at the bottom of existing electronic butterfly water valves.

Description

Technical Field

[0001] The present invention relates to the field of water valves, in particular to a valve body bottom sealing structure of a butterfly water valve and the butterfly water valve. Background Art

[0002] In recent years, new-generation vehicle powertrains, represented by pure electric and fuel cell vehicles, have become a key focus for major automakers. The thermal management systems of new energy vehicles are complex, with different operating systems requiring varying temperature control requirements and, consequently, varying coolant flow rates. Therefore, new energy vehicles require efficient thermal management systems to ensure stable operation, posing significant challenges in temperature control. Traditional automotive thermostats suffer from shortcomings such as delayed response and hysteresis, resulting in poor flowability and difficulty in accurately controlling flow rates. This results in inefficient thermal management and is unable to meet the stringent temperature control requirements of new energy vehicles. Consequently, traditional vehicle thermal management systems are undergoing gradual optimization, with some models now using electronic water valves instead of traditional thermostats for coolant regulation.

[0003] The electronic water valve is a new type of coolant flow control valve in the thermal management system of new energy vehicles. Its function and operating principle are similar to those of the thermostat in traditional fuel vehicles. Its main function is to adaptively adjust the coolant flow rate in each pipeline according to the temperature changes of different working parts, ensuring that the battery, motor, and other components are at the optimal operating temperature environment, thereby achieving energy conservation, emission reduction, and improved energy utilization.

[0004] Most current electronic water valves use a traditional column valve structure, with the inlet and outlet channels located on the sidewalls of the valve body. This occupies a relatively large volume, leading to the emergence of electronic butterfly water valves, such as the invention patent with publication number CN 113154088 A. These valves have flow holes located on the bottom surface of the valve body, occupying a relatively small space and offering tight and reliable sealing, low flow resistance, high pressure differential, flexible and labor-saving operation, and a long service life. However, during installation, these electronic butterfly water valves require the bottom surface of the valve body to be assembled with a corresponding mating component on a heat pump. To facilitate assembly, an axial seal is typically employed, in which a groove is cut in the bottom surface of the valve body and an axial sealing ring is installed. While this sealing method effectively prevents leakage, because the axial sealing ring is pressed against the bottom surface of the valve body, the bottom plate of the valve body is subject to a certain degree of deformation due to the rebound force of the axial sealing ring. This deformation of the bottom plate increases the torque of the rotating valve core within the valve body, and internal leakage within the valve body is more likely to occur, significantly impacting the use of the butterfly water valve. Summary of the Invention

[0005] The present invention provides a butterfly water valve body bottom sealing structure and a butterfly water valve, which can solve the problem that the existing electronic butterfly water valve adopts axial sealing at the bottom, resulting in increased valve core torque and easy internal leakage.

[0006] To achieve the above-mentioned objectives, in a first aspect, the present invention provides the following technical solutions: a valve body bottom sealing structure of a butterfly water valve, comprising a valve body, wherein the bottom of the valve body has a bottom plate; a water valve matching piece, which is installed at the bottom of the valve body and is in close contact with the bottom plate, wherein the water valve matching piece and the bottom plate are both provided with a plurality of corresponding flow holes, wherein one of the water valve matching piece and the bottom plate is provided with a sealing inner recess around the flow hole on the opposite surface, a first sealing side wall is provided around the flow hole on the inner side of the sealing inner recess, a sealing ring is provided in close contact with the outer side of the flow hole along the first sealing side wall, and a sealing boss is provided on the other of the water valve matching piece and the bottom plate, wherein the sealing boss faces the outer surface of the sealing inner recess. The sealing ring has a second sealing side wall, and a radial sealing space is formed between the second sealing side wall and the corresponding first sealing side wall. The sealing ring is located in the radial sealing space, and the second sealing side wall and the first sealing side wall radially squeeze the sealing ring. By arranging a sealing inner recess and a corresponding sealing boss between the water valve counterpart and the bottom plate, and arranging the sealing ring between the sealing boss and the first sealing side wall, the radial sealing of the sealing ring is utilized to realize the sealing between the valve body and the water valve counterpart, thereby avoiding the bottom plate from being subjected to the axial force from the sealing ring, so that the bottom plate will not be deformed, and solving the problem that the axial sealing at the bottom of the existing electronic butterfly water valve causes the valve core torque to increase and is prone to internal leakage.

[0007] Preferably, a first step portion is provided at the root of the second sealing side wall of the sealing boss, and a second step portion is provided at the root of the first sealing side wall. The first step portion and the second step portion can limit the sealing ring to prevent axial movement of the sealing ring, and can also improve the overall strength of the bottom plate and the water valve matching parts.

[0008] Preferably, the water valve matching part is provided with at least one circle of external leakage sealing groove near the side wall of the valve body facing the valve body, and an external leakage sealing ring is embedded in the external leakage sealing groove. The external leakage sealing ring is axially abutted against the bottom plate. The external leakage sealing ring can effectively prevent the leakage of the medium within the range of the flow hole.

[0009] Preferably, the multiple sealing rings in the sealing inner recess are connected together to form an integrated structure. The integrated structure allows the multiple sealing rings to be installed at one time, is not easily displaced, and has a better sealing effect.

[0010] Preferably, the shapes of the valve body and the water valve counterpart match each other, the outer edge of the valve body is provided with a plurality of first extension connecting platforms, the outer edge of the water valve counterpart is provided with a second extension connecting platform that matches and docks with the first extension connecting platform, and the first extension connecting platform and the second extension connecting platform are connected by fasteners. By connecting the plurality of first extension connecting platforms and the second extension connecting platform, a firm connection between the valve body and the water valve counterpart can be achieved, which is not easy to loosen, thereby ensuring the sealing.

[0011] In the second aspect, the present invention also provides a butterfly water valve, including the valve body bottom sealing structure of the butterfly water valve described in the first aspect, a valve core that rotates plane around the center of the bottom plate is provided on the upper side of the bottom plate, and a flow channel is provided inside the valve core to switch and adjust the flow state between different flow holes. The use of the valve body bottom sealing structure in the first aspect will not cause the bottom plate to deform, so that the torque of the valve core will not increase.

[0012] Preferably, a sealing gasket surrounding all the flow holes is installed between the valve core and the bottom plate. The sealing gasket can seal the gap between the valve core and the bottom plate to prevent leakage when the valve core rotates.

[0013] Preferably, the sealing gasket is embedded in a sealing groove arranged around the circulation hole on the upper side of the bottom plate, and the sealing groove can position the sealing gasket.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By providing a sealing inner recess and a corresponding sealing boss, and arranging the sealing ring between the sealing boss and the inner side wall, the radial sealing of the sealing ring is utilized to achieve sealing between the valve body and the water valve counterpart, thereby avoiding the bottom plate from being subjected to axial force from the sealing ring, so that the bottom plate will not be deformed; the sealing boss can improve the overall strength of the bottom plate, making the bottom plate less likely to deform. When the valve body made of plastic material and the water valve counterpart made of plastic material are changed from the original axial end face seal to radial seal, the deformation of the valve body will decrease by about 75%, and the driving torque of the valve core will decrease by about 30%, thereby solving the problem of increased valve core torque and easy internal leakage caused by the axial seal at the bottom of the existing electronic butterfly water valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 It is a cross-sectional structural diagram of a first embodiment of the present invention;

[0018] Figure 3 for Figure 2 A magnified structural diagram;

[0019] Figure 4 A three-dimensional structural diagram of an exploded state of a first embodiment of the present invention;

[0020] Figure 5 It is a cross-sectional structural diagram of a second embodiment of the present invention.

[0021] Reference numerals:

[0022] 1. Valve body, 11. Bottom plate, 12. Sealing boss, 13. First extension connecting platform, 14. Sealing inner recess, 15. External leakage sealing groove, 16. Second extension connecting platform, 17. Second step portion, 18. First step portion, 2. Valve core, 3. Water valve matching part, 4. Flow hole, 5. External leakage sealing ring, 6. Sealing gasket, 7. Sealing ring, 8. First sealing side wall, 9. Second sealing side wall, 10. Radial sealing space. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0024] like Figure 1-5 As shown, the present invention solves the problem that the axial seal at the bottom of the existing electronic butterfly water valve causes an increase in valve core torque and is prone to internal leakage, and provides the following technical solutions: a valve body bottom sealing structure of a butterfly water valve, comprising a valve body 1, wherein the bottom of the valve body 1 has a bottom plate 11; a water valve counterpart 3, which is mounted on the bottom of the valve body 1 and is in close contact with the bottom plate 11, and a plurality of corresponding flow holes 4 are provided on the water valve counterpart 3 and the bottom plate 11, and one of the water valve counterpart 3 and the bottom plate 11 is provided with a sealing inner recess 14 around the flow hole 4 on the opposite surface, and a first sealing side wall 8 is provided on the inner side of the sealing inner recess 14 around the flow hole 4, and a sealing ring 7 is provided on the outer side of the flow hole 4 in close contact along the first sealing side wall 8, and a sealing ring 7 is provided on the other of the water valve counterpart 3 and the bottom plate 11. Boss 12, the sealing boss 12 has a second sealing side wall 9 facing the sealing ring 7, and a radial sealing space 10 is formed between the second sealing side wall 9 and the corresponding first sealing side wall 8. The sealing ring 7 is located in the radial sealing space 10, and the second sealing side wall 9 and the first sealing side wall 8 radially squeeze the sealing ring 7. By arranging a sealing inner recess 14 and a corresponding sealing boss 12 between the water valve counterpart 3 and the bottom plate 11, and arranging the sealing ring 7 between the sealing boss 12 and the first sealing side wall 8, the radial sealing of the sealing ring 7 is utilized to realize the sealing between the valve body 1 and the water valve counterpart 3, avoiding the bottom plate 11 from being subjected to the axial force from the sealing ring 7, so that the bottom plate 11 will not be deformed, and solving the problem that the valve core torque increases and internal leakage is prone to occur due to the axial sealing at the bottom of the existing electronic butterfly water valve.

[0025] Specifically, such as Figure 2-3 As shown, as an embodiment, the sealing boss 12 is provided on the bottom plate 11, and the sealing recess 14 is provided on the water valve counterpart 3, so that the sealing boss 12 can improve the strength of the bottom plate 11, and the bottom plate 11 can be made relatively thin.

[0026] And as Figure 5 As shown, as another embodiment, the sealing boss 12 can also be provided on the water valve counterpart 3, the sealing boss 12 is provided upward, and the sealing recess 14 is provided at the bottom of the bottom plate 11. The sealing boss 12 is an integrated structure in the sealing recess 14, and its end face can be offset against the bottom surface of the sealing recess 14. The sealing recess 14 does not affect the overall strength of the bottom plate 11.

[0027] In addition, the shape of the sealing ring 7 matches the shape of each corresponding flow hole 4. The cross-section of the sealing ring 7 can be circular or other shapes, such as elliptical, rectangular, etc. In actual application, multiple sealing rings 7 are connected together to form an integrated structure. The integrated structure allows multiple sealing rings 7 to be installed at one time, is not easy to shift, and has a better sealing effect.

[0028] At the same time, if Figure 3 As shown, a first step portion 18 is provided at the root of the second sealing side wall 9 of the sealing boss 12, and a second step portion 17 is provided at the root of the first sealing side wall 8. The first step portion 18 and the second step portion 17 can limit the sealing ring to prevent the sealing ring from axial movement, and can improve the overall strength of the bottom plate and the water valve matching part 3. The first step portion 18 and the second step portion 17 do not have the effect of axially pressing the sealing ring 7, but only prevent the sealing ring 7 from having a relatively large axial movement. The side wall of the sealing boss 12 away from the first sealing side wall 8 is against the inner wall of the sealing inner recess 14, which can improve the overall strength. The first step portion 18 and the second step portion 17 can reduce the impact force of the coolant in the valve on the sealing ring 7 while meeting the sealing ring filling rate.

[0029] In order to avoid leakage between the bottom plate 11 and the water valve counterpart 3, Figure 2 As shown, the water valve counterpart 3 is provided with at least one circle of leakage sealing groove 15 on the side facing the valve body 1, close to the side wall of the valve body 1. The leakage sealing groove 15 is embedded with a leakage sealing ring 5. The leakage sealing ring 5 is axially abutted against the bottom plate 11. The leakage sealing ring 5 can effectively prevent the leakage of the medium within the flow hole 4. Although the leakage sealing ring 5 is axially sealed, due to its position close to the side wall of the valve body 1, the axial force on the bottom plate 11 is not large, and the bottom plate 11 will not be deformed.

[0030] As a way of installing the valve body 1 and the water valve matching part 3, Figure 4 As shown, the shapes of the valve body 1 and the water valve counterpart 3 match each other, the outer edge of the valve body 1 is provided with multiple first extension connecting platforms 13, and the outer edge of the water valve counterpart 3 is provided with a second extension connecting platform 16 that matches and docks with the first extension connecting platform 13. The first extension connecting platform 13 and the second extension connecting platform 16 are connected by fasteners. By connecting multiple first extension connecting platforms 13 and the second extension connecting platform 16, a firm connection between the valve body 1 and the water valve counterpart 3 can be achieved, which is not easy to loosen, thereby ensuring sealing.

[0031] In this embodiment, a butterfly water valve is also provided, including the valve body bottom sealing structure of the above-mentioned butterfly water valve, and a valve core 2 is provided on the upper side of the bottom plate 11, which rotates in a plane around the center of the bottom plate 11, and a flow channel is provided inside the valve core 2 to switch and adjust the flow state between different flow holes 4. The use of the valve body bottom sealing structure in the first aspect will not cause the bottom plate 11 to deform, so that the torque of the valve core 2 will not increase.

[0032] At the same time, in order to improve the sealing between the valve core 2 and the bottom plate 11, a sealing gasket 6 surrounding all the flow holes 4 is installed between the valve core 2 and the bottom plate 11. The sealing gasket 6 can seal the gap between the valve core 2 and the bottom plate 11 to prevent internal leakage when the valve core 2 rotates. The sealing gasket 6 is embedded in a sealing groove set around the flow hole 4 on the upper side of the bottom plate 11, and the sealing groove can position the sealing gasket 6.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, the terms "first," "second," and so on, used in this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being described. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this disclosure, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0035] In the present invention, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0036] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A butterfly water valve body bottom sealing structure, comprising: A valve body (1), wherein the bottom of the valve body (1) has a bottom plate (11); The water valve matching piece (3) is installed at the bottom of the valve body (1) and is in close contact with the bottom plate (11). The water valve matching piece (3) and the bottom plate (11) are both provided with a plurality of corresponding flow holes (4), and are characterized in that: One of the water valve matching piece (3) and the bottom plate (11) is provided with a sealing inner recess (14) on the opposite surface around the flow hole (4), a first sealing side wall (8) is provided on the inner side of the sealing inner recess (14) around the flow hole (4), and a sealing ring (7) is provided on the outer side of the flow hole (4) in close contact along the first sealing side wall (8), and the other of the water valve matching piece (3) and the bottom plate (11) is provided with a sealing boss (12) embedded in the sealing inner recess (14), and the sealing boss (12) has a second sealing side wall (9) facing the sealing ring (7), and a radial sealing space (10) is formed between the second sealing side wall (9) and the corresponding first sealing side wall (8), and the sealing ring (7) is located in the radial sealing space (10), and the second sealing side wall (9) and the first sealing side wall (8) radially squeeze the sealing ring (7); A first step portion (18) is provided at the root of the second sealing side wall (9) of the sealing boss (12), and a second step portion (17) is provided at the root of the first sealing side wall (8). The first step portion (18) and the second step portion (17) do not have an axial compression effect on the sealing ring (7), but only prevent the sealing ring (7) from axial movement.

2. The bottom sealing structure of the butterfly water valve according to claim 1, characterized in that: At least one circle of external leakage sealing groove (15) is provided on the side of the water valve matching part (3) facing the valve body (1) and close to the side wall of the valve body (1). An external leakage sealing ring (5) is embedded in the external leakage sealing groove (15), and the external leakage sealing ring (5) is axially opposed to the bottom plate (11).

3. The bottom sealing structure of the butterfly water valve according to claim 1, characterized in that: The multiple sealing rings (7) in the sealing inner recess (14) are connected together to form an integrated structure.

4. The bottom sealing structure of the butterfly water valve according to claim 1, characterized in that: The shapes of the valve body (1) and the water valve matching piece (3) match each other. The outer edge of the valve body (1) is provided with a plurality of first extension connection platforms (13). The outer edge of the water valve matching piece (3) is provided with a second extension connection platform (16) that matches and docks with the first extension connection platform (13). The first extension connection platform (13) and the second extension connection platform (16) are connected by fasteners.

5. A butterfly water valve, characterized in that: The invention comprises a bottom sealing structure of a butterfly water valve according to any one of claims 1 to 4, wherein a valve core (2) which rotates in a plane around the center of the bottom plate (11) is provided on the upper side of the bottom plate (11), and a flow channel is provided inside the valve core (2) to switch and adjust the flow state between different flow holes (4).

6. The butterfly water valve according to claim 5, characterized in that: A sealing gasket (6) surrounding all the flow holes (4) is installed between the valve core (2) and the bottom plate (11).

7. The butterfly water valve according to claim 6, characterized in that: The sealing gasket (6) is embedded in a sealing groove arranged around the circulation hole (4) on the upper side of the bottom plate (11).

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