CN110630751B

CN110630751B - Fluid control valve

Info

Publication number: CN110630751B
Application number: CN201810787833.5A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2018-06-21
Filing date: 2018-07-17
Publication date: 2023-08-01
Anticipated expiration: 2038-07-17
Also published as: CN110630751A

Abstract

The invention relates to a fluid control valve, which comprises a control part and a valve body part, wherein the valve body part comprises a valve body, a valve seat, a valve rod and a valve core, the valve seat is fixedly arranged in an inner cavity of the valve body part, the valve core is arranged in the inner cavity, one side of the valve seat, facing the valve core, is provided with a valve port, the cross section of the valve port is round, the valve rod comprises a rod body and a transmission plate, the rod body is in transmission connection with the control part, the transmission plate is connected with the valve core, the valve rod can drive the valve core to rotate so as to be abutted against or far away from the valve port, the valve core comprises a spherical surface, the spherical center of the spherical surface deviates from the central axis of the rod body, and when the spherical surface is abutted against the valve port, the spherical center of the spherical surface is approximately positioned on the central axis of the valve port. According to the invention, the valve core with the spherical surface is matched with the circular valve port, so that the sealing reliability of the valve core and the valve port can be improved.

Description

Fluid control valve

Technical Field

The invention relates to the technical field of fluid control, in particular to a fluid control valve.

Background

The air in the room is heat exchanged by the water cooling (heating) in the coil under the drive of the unit fan of the central air conditioner to keep the temperature of the room stable. In the fan coil of the central air conditioner, the fluid control valve is matched with the valve port through the valve core to control the on-off of the refrigerating (hot) water.

Fig. 18 is a schematic structural diagram of a valve closing state of a fluid control valve in the background art, as shown in fig. 18, the fluid control valve comprises a valve body 01, a valve rod 02, a valve core 03 and a valve seat 04, wherein the valve seat 04 is provided with a valve port 05, the valve rod 02 is fixedly connected with the valve core 03, the valve core 03 deviates from the central axis of the valve rod 02, the valve rod 02 rotates to drive the valve core 03 to swing, and as a part 06 of the valve core 02 matched with the valve port 05 is a plane, the sealing effect of the valve core 03 and the valve port 05 can be influenced by the dimensional accuracy of the relative positions of the two.

In view of this, it is an object of the present invention to provide a valve element and a valve port which are less susceptible to dimensional accuracy in relative positions of the two and which can be improved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a fluid control valve, which can improve the sealing reliability of a valve core and a valve port.

In order to solve the technical problems, the invention provides a fluid control valve, which comprises a control part and a valve body part, wherein the valve body part comprises a valve body, a valve seat, a valve rod and a valve core, the valve seat is fixedly arranged in an inner cavity of the valve body part, the valve core is arranged in the inner cavity, a valve port is arranged on one side of the valve seat, which faces the valve core, the cross section of the valve port is circular, the valve rod comprises a rod body and a transmission plate, the rod body is in transmission connection with the control part, the transmission plate is connected with the valve core, the valve rod can drive the valve core to rotate so as to be abutted against or away from the valve port, the valve core comprises a spherical surface, the spherical center of the spherical surface deviates from the central axis of the rod body, and when the spherical surface is abutted against the valve port, the spherical center of the spherical surface is approximately positioned on the central axis of the valve port.

The invention provides a fluid control valve, which comprises a control part and a valve body part, wherein the valve body part comprises a valve seat, a valve rod and a valve core, the valve seat is provided with a valve port, the valve core comprises a spherical surface, the spherical center of the spherical surface deviates from the central axis of a rod body of the valve rod, when the spherical surface is abutted with the valve port, the spherical center of the spherical surface is approximately positioned on the central axis of the valve port, and the spherical surface of the valve core and the valve port can be well sealed.

Drawings

FIG. 1 is an overall view of a fluid control valve according to one embodiment of the present invention;

FIG. 2 is a schematic diagram of the control component of FIG. 1;

FIG. 3 is a 1/4 cross-sectional view of the valve body member of FIG. 1;

FIG. 4a is a schematic illustration of a valve cartridge;

FIG. 4b is a cross-sectional view of the valve cartridge of FIG. 4 a;

FIG. 5 is a schematic view of a drive plate;

FIG. 6 is a schematic view of the assembly of the rod, the valve core of FIG. 4a, and the drive plate of FIG. 5;

FIG. 7a is a schematic illustration of another valve cartridge;

FIG. 7b is a cross-sectional view of the valve cartridge of FIG. 7 a;

FIG. 8a is a schematic view of a third valve cartridge;

FIG. 8b is a cross-sectional view of the valve cartridge of FIG. 8 a;

FIG. 9 is a schematic view of another drive plate configuration;

FIG. 10 is a schematic view of the assembly of the rod, the valve cartridge of FIG. 4a, and the drive plate of FIG. 9;

FIG. 11 is a schematic view of the open state of the fluid control valve provided by the present invention;

FIG. 12 is a schematic view of a valve closing state of a fluid control valve provided by the present invention;

FIG. 13 is a schematic view of the valve body of FIG. 1 prior to staking with the valve seat;

FIG. 14 is an enlarged schematic view of FIG. 13 at A;

FIG. 15 is a schematic view of the valve body of FIG. 1 after being riveted to a valve seat;

FIG. 16 is an enlarged schematic view of FIG. 15 at B;

FIG. 17 is a schematic view of the valve seat of FIG. 1;

fig. 18 is a schematic diagram of a valve closing state of a fluid control valve of the background art.

In fig. 1-17, the reference numerals are as follows:

1-a control part, 11-a shell, 12-a motor, 121-an output shaft, 13-a connecting seat and 131-a groove; 2-valve body part, 21-valve body, 211-fluid inlet, 212-fluid outlet, 22-valve seat, 222-valve port, 223-annular flange, 224-annular recess, 23-valve stem, 231-key shaft, 232-transverse through slot, 233-stem, 234-rivet, 24-valve core, 241-ball, 2411-ball face, 243-cylindrical, 244-flange, 245-protrusion, 246/246' -conical face, 247-through slot, 25-valve seat hole, 251-extension, 252-counter bore, 26-drive plate, 261-mounting hole, 262-rivet hole, 263-one side end of drive plate, 264-one side end of drive plate, 265-clamping slot, 27-sealing ring.

Detailed Description

In order to make the technical scheme of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

Referring now to FIGS. 1-17, FIG. 1 is an overall view of a fluid control valve according to one embodiment of the present invention; FIG. 2 is a schematic diagram of the control component of FIG. 1; FIG. 3 is a 1/4 cross-sectional view of the valve body member of FIG. 1; FIG. 4a is a schematic illustration of a valve cartridge; FIG. 4b is a cross-sectional view of the valve cartridge of FIG. 4 a; FIG. 5 is a schematic view of a drive plate; FIG. 6 is a schematic view of the assembly of the rod, the valve core of FIG. 4a, and the drive plate of FIG. 5; FIG. 7a is a schematic illustration of another valve cartridge; FIG. 7b is a cross-sectional view of the valve cartridge of FIG. 7 a; FIG. 8a is a schematic view of a third valve cartridge; FIG. 8b is a cross-sectional view of the valve cartridge of FIG. 8 a; FIG. 9 is a schematic view of another drive plate configuration; FIG. 10 is a schematic view of the assembly of the rod, the valve cartridge of FIG. 4a, and the drive plate of FIG. 9; FIG. 11 is a schematic view of the open state of the fluid control valve provided by the present invention; FIG. 12 is a schematic view of a valve closing state of a fluid control valve provided by the present invention; FIG. 13 is a schematic view of the valve body of FIG. 1 prior to staking with the valve seat; FIG. 14 is an enlarged schematic view of FIG. 13 at A; FIG. 15 is a schematic view of the valve body of FIG. 1 after being riveted to a valve seat; FIG. 16 is an enlarged schematic view of FIG. 15 at B; fig. 17 is a schematic view of the valve seat of fig. 1.

As shown in fig. 1 and 2, the fluid control valve provided in this embodiment includes a control component 1 and a valve body component 2, where the control component 1 includes a housing 11, a motor 12, and a connection seat 13, the motor 12 is fixedly disposed in the housing 11, the motor 12 includes an output shaft 121, and the output shaft 121 is in transmission connection with the connection seat 13, that is, by energizing the motor 12, the output shaft 121 rotates and can drive the connection seat 13 to rotate. The connecting seat 13 extends out of the outer surface of the shell 11, the connecting seat 13 is rotatable in the circumferential direction and limited in the shell 11 in the axial direction, one end of the connecting seat 13 facing the valve body part 2 is provided with a groove 131, the cross section of the groove 131 is non-circular, and in the embodiment, the groove 131 is a kidney-shaped counter bore.

As shown in fig. 3, 4a, 4b, 5, 6, 11, and 12, the valve body member 2 includes a valve body 21, a valve seat 22, a valve stem 23, and a valve core 24, and the valve body 21 includes a fluid inlet 211, a fluid outlet 212, and a valve seat hole 25. The valve seat 22 is in a cylindrical shape and is fixedly arranged in the valve seat hole 25, one end of the valve seat 22 close to the valve core 24 is provided with a valve port 222, and the cross section of the valve port 222 is circular. The valve core 24 comprises a spherical surface 2411 which is matched and sealed with the valve port 222, and the diameter of the spherical surface 2411 is 2-5mm larger than that of the valve port 222, so that the spherical surface 2411 of the valve core 24 can be reliably sealed with the valve port 222. Spherical surface is referred to herein as a sphere, and may be the entire surface of the sphere or a portion of the entire surface of the sphere, such as a spherical cap. The valve rod 23 includes a rod 233 and a driving plate 26, the spherical center of the spherical surface 2411 deviates from the central axis of the rod 233, that is, the valve core 24 and the valve rod 23 are eccentrically arranged, and the central axis of the rod 233 is perpendicular to the central axis of the valve port 222, so that the valve core 24 is ensured to move in the same horizontal plane during the rotation of the rod 233, and the valve core 24 and the valve port 222 are easy to seal in a matching way. In addition, one end of the rod body 233 facing the control part 1 is provided with a key shaft portion 231, the cross section of the key shaft portion 231 is non-circular, in this embodiment, the cross section of the key shaft portion 231 is kidney-shaped, the key shaft portion 231 is connected with the groove 131 through a key groove, and the other end of the rod body 233 is provided with a transverse through groove 232. The driving plate 26 is made of a metal plate in a punched mode, the driving plate 26 is approximately rectangular, at least 2 rivet holes 262 are formed in one end portion of the driving plate 26, one side end 263 provided with the rivet holes 262 is arranged in the transverse through groove 232, the driving plate 26 is fixed to the rod body 233 through rivets 234, the valve rod 23 can drive the valve core 24 to rotate to abut against or be away from the valve port 222 through the clamping connection of the driving plate 26, and when the spherical surface 2411 abuts against the valve port 222, the spherical center of a ball where the spherical surface 2411 is located is approximately located on the central axis of the valve port 222.

In the above embodiment, the valve seat 22 is provided with the valve port 222, the cross section of the valve port 222 is circular, the "cross section" means that the valve port 222 is cut parallel to the bottom surface, and the exposed portion is the cross section, that is, the portion where the valve port 222 abuts against the valve element 24 is circular. The spherical surface 2411 is provided on the valve core 24, and the spherical surface 2411 of the valve core 24 seals with the valve port 222, so that compared with the sealing surface of the valve core and the valve port in the background art, the embodiment is easier to fit and seal, and can improve the sealing reliability of the valve core 24 and the valve port 222.

Further, as shown in fig. 5 and 6, the driving plate 26 is provided with a mounting hole 261, the mounting hole 261 in this embodiment is a circular hole, one end 263 of the driving plate 26 is fixedly connected to the rod body 233 by a rivet 234, the valve core 24 includes a columnar portion 243, a spherical portion 241 located on one side of the columnar portion 243, and a flange portion 244 located on the other side of the columnar portion 243, the columnar portion 243 penetrates through the mounting hole 261, and the spherical portion 241 includes the spherical surface 2411. Specifically, in the present embodiment, a hemisphere is used as the spherical portion 241, and of course, a round table may be used as the spherical portion 241, that is, a piece may be cut out on the basis of the hemisphere, and the circumferential outer edge surface of the round table may be used as the spherical surface 2411, which can also achieve reliable sealing with the valve port 222. In this embodiment, the valve core 24 and the transmission plate 26 are in a clamping connection.

Further, as shown in fig. 4a, 4b, 5 and 12, when the height of the columnar portion 243 is defined as H and the thickness of the driving plate 26 is defined as T, it is satisfied that: H-T is more than or equal to 0.5mm and less than or equal to 2mm; if the outer diameter of the columnar portion is defined as D1, the diameter of the mounting hole is defined as D2, and the maximum outer diameter of the flange portion is defined as D3, the following is satisfied: d1 is more than or equal to D2 and less than or equal to D3-D2 is more than or equal to 2mm and less than or equal to 3mm, and D2-D1 is more than or equal to 1mm and less than or equal to 3mm. So set up, after case 24 and drive plate 26 are installed, case 24 can not break away from drive plate 26, and in addition, case 24 has the clearance of removal in axial and radial to mounting hole 261, and in the fluid control valve closing process, under the rotatory drive of valve rod 23, case 24 can the automatic adjustment position with valve port 222 relatively, guarantees the seal reliability with valve port 222. The specific gap is set, so that manufacturing and assembly errors of parts are made up, the precision requirement on the processing of the parts is reduced, the manufacturing efficiency is improved, and the manufacturing cost is reduced.

As shown in fig. 7a and 7b, the flange 244 includes at least 2 radially extending protrusions 245, and a tapered surface 246 having a gradually increasing diameter is provided on a side of the protrusions 245 away from the spherical portion 241, where the gradually increasing diameter means that the diameter of the tapered surface 246 increases as the protrusions get closer to the spherical portion 241. The valve core 24 is made of a compressible material, and specifically, the valve core 24 is integrally formed from a rubber material in this embodiment. The valve core 24 is convenient to install with the transmission plate 26 due to the fact that the protruding portion 245 is compressed and deformed inwards in the radial direction by the guiding effect of the conical surface 246, namely the protruding portion 245 made of rubber is deformed inwards after being extruded, the outer diameter of the protruding portion 245 is reduced, accordingly, the valve core 245 can penetrate through the installation hole 261, radial force disappears after penetrating, the outer diameter of the protruding portion 245 is restored to the original size, the valve core 24 cannot fall off in the rotating process, the valve core 24 is convenient to install with the transmission plate 26 due to the fact that the rubber is made of soft materials, the valve core 24 is attached to the valve port 222 more easily, and sealing performance is improved.

Of course, as shown in fig. 8a and 8b, the flange 244 may be deformed, in which the circumferential outer edge is provided with at least 2 through grooves 247 extending in the axial direction, and the flange 244 is provided with tapered surfaces 246 'having a diameter gradually increasing toward the spherical portion 241, wherein the diameter gradually increasing means that the diameter of the tapered surfaces 246' increases toward the spherical portion 241. The flange 244 of the present embodiment can be compressed and deformed toward the through groove 247 during the process of pressing into the mounting hole 261, and the beneficial effects thereof are the same as above, and will not be described again.

As shown in fig. 9, the driving plate 26 further includes a clamping groove 265, and the clamping groove 265 penetrates through the end 264 of the driving plate 26 and the mounting hole 261, that is, the clamping groove 265 communicates with the mounting hole 261 of the driving plate 26, so that the columnar portion 243 of the valve core 24 can be pressed into the mounting hole 261 by the clamping groove 265, and if the minimum width of the clamping groove 265 is defined as W, the outer diameter of the columnar portion 243 is defined as D1, and the diameter of the mounting hole 261 is defined as D2, then: w < D1 < D2, the columnar portion 243 is installed in the installation hole 261 through the clamping groove 265, and the valve core 24 cannot be separated from the transmission plate 26.

Further, as shown in fig. 13, the valve body 21 further includes a limiting portion, where the limiting portion is used to limit the axial position of the valve seat 22 in the valve seat hole 25, so that the valve seat 22 can be prevented from moving outwards in the valve seat hole 25 along the axial direction thereof under the condition that the valve core 24 is frequently applied with a load force in the rotating process for a long time, so as to improve the fixing reliability between the valve seat 22 and the valve seat hole 25, and further avoid the loose condition.

Where "outer" refers to the side of the valve seat 22 into which it fits when installed, the side distal from the valve spool 24, and correspondingly "inner" refers to the side proximal to the valve spool 24, i.e., the side opposite the "outer".

In the above-described embodiment, as shown in fig. 13, 14, 15, 16, the stopper portion includes the first stopper provided on the outer end surface of the valve seat hole 25, and the first stopper can press the outer end surface of the valve seat 22 when the valve seat 22 is fitted into the valve seat hole 25. Because of the blocking of the first stopper, even if the valve seat 22 is acted upon by the valve spool 24 during long-term use, the valve seat hole 25 does not move axially outward (left side is "outward" as shown in fig. 13 or 15), that is, in this embodiment, the first stopper forms the above-described limit portion or a part of the limit portion. Of course, in the present embodiment, the first stopper may be provided at other positions, such as other positions of the valve body 21, as long as it restricts the valve seat 22 from moving axially outward after the valve seat 22 is fitted into the valve seat hole 25.

In the above-described embodiment, specifically, the first stopper is provided as the extension 251 provided along the outer end circumference of the valve seat hole 25 and capable of being riveted to the outer end surface of the valve seat 22. That is, as shown in fig. 10, after the valve seat 22 is fitted into the valve seat hole 25, the extending portion 251 is swaged over the outer end surface of the valve seat 22 in the axial direction to restrict the axial position of the valve seat 22, and the valve seat 22 is prevented from moving outward in the axial direction thereof. The extension portion 251 may be an integral structure disposed along a circumferential direction, or may be a plurality of split structures disposed at intervals along the circumferential direction.

After the valve seat 22 is installed in the valve seat hole 25, the axial position of the valve seat 22 can be fixed by a fixing tool, and then the extending part 251 is riveted on the outer end surface of the valve seat 22, so that the axial force is prevented from being applied to the valve seat 22 in the process of bending and riveting the extending part 251, and the valve seat 22 moves inwards. In addition, the axial position of the valve seat 22, i.e. the final assembly position of the valve seat 22, is fixed during the crimping of the extension 251, ensuring the fit with the valve core 24.

Further, the limiting portion may be further used to limit the movement of the valve seat 22 inwardly in the axial direction thereof in the valve seat hole 25, and in this embodiment, the limiting portion further includes a second blocking member extending radially outwardly along the peripheral surface of the outer end of the valve seat 22 and abutting against the outer end surface of the valve seat hole, so that the movement of the valve seat 22 inwardly in the axial direction is limited, that is, in this embodiment, the first blocking member and the second blocking member provided on the valve seat 22 cooperate to form the above-mentioned limiting portion to limit the movement of the valve seat 22 in the axial direction thereof in the valve seat hole 25. The second blocking member is disposed at the outer end of the valve seat 22, so that the valve seat 22 can be conveniently installed, for example, after the valve seat 22 is installed in the valve seat hole 25 until the second blocking member is tightly attached to the outer end surface of the valve seat hole 25, the first blocking member is tightly pressed against the outer end surface of the valve seat 22.

In addition, the distance between the inner end surface of the valve seat 22 and the valve core 24 can be fixed by the second blocking piece, and in the installation process, no additional fixture is needed, the second blocking piece can ensure the axial position of the valve seat 22 to be fixed, can prevent the valve seat 22 from moving inwards when the riveting and rolling extension 251 is bent, and can ensure the distance between the inner end surface of the valve seat 22 and the valve core 24, so that the valve core 24 and the valve port 222 are well matched, and further the on-off of fluid flowing through the valve port 222 is realized. Meanwhile, the second blocking piece can also limit the inward movement of the valve seat 22 in the use process, so that the phenomenon that the valve core 24 collides with the valve seat 22 in the rotation process to push the valve seat 22 outwards after the valve seat 22 moves inwards in the axial direction and loosens after long-time use is avoided.

In the above embodiment, as shown in fig. 17, the second blocking member is an annular flange 223 circumferentially disposed along the outer end of the valve seat 22, the annular flange 223 is abutted against the outer end face of the valve seat hole 25, at this time, the first blocking member can implement the limitation of the valve seat 22 by pressing the annular flange 223, and when the first blocking member is an extension portion 251, the extension portion 251 can be wrapped around the edge of the annular flange 223 to form a flanging, as shown in fig. 16, so as to implement the riveting fixation. Of course, the second blocking member may be provided as a plurality of blocking plates circumferentially disposed along the outer end of the valve seat 22, and each blocking plate is abutted against the outer end surface of the valve seat hole, and at this time, the extending portions 251 are provided as separate structures disposed at intervals and are riveted to each blocking plate in a one-to-one correspondence.

In the above embodiment, as shown in fig. 14 and 16, the outer end surface of the valve seat hole 25 is further provided with a counter bore 252 adapted to the annular flange 223, the annular flange 223 is located in the counter bore 252, wherein the axial distance between the outer end surface of the valve seat hole and the bottom of the counter bore 252 is not greater than the thickness of the annular flange 223, so that the first stopper is convenient for limiting the annular flange 223, for example, when the first stopper is the extension part 251, the extension part 251 can be extended along the inner side wall of the counter bore 252, and when the annular flange 223 is flush with the outer end surface of the valve seat hole or protrudes out of the outer end surface of the valve seat hole, the extension part 251 is convenient for riveting and fixing the same.

In the above-described embodiment, on the outer side wall of the valve seat 22 which is fitted with the valve seat hole 25 and the inner side wall of the valve seat hole 25 which is fitted with the valve seat 22, at least one of them is provided with the annular recess 224, and the seal ring 3 is placed in the annular recess 224, and the circumferential seal between the valve seat 22 and the valve seat hole 25 is achieved by the seal ring 3. Therefore, the fluid control valve can avoid the condition that the fluid passes between the valve seat 22 and the valve seat hole 25 in the use process, namely the internal leakage occurs, thereby ensuring the normal use of the fluid control valve. Of course, the circumferential seal may also be achieved by an interference fit between the valve seat 22 and the valve seat 2, or the like. The scheme provided with the annular concave part 224 and the sealing ring 3 ensures that the valve seat 22 and the valve seat hole 25 are in clearance fit, and compared with the scheme of interference fit, the machining precision of the outer edges of the valve seat hole 25 and the valve seat 22 can be reduced, the manufacturing cost is reduced, and the valve seat can be installed without depending on external force and the like during installation, and the installation process is simpler.

In the above-described embodiment, specifically, as shown in fig. 17, the annular recess 224 is provided on the outer side wall of the valve seat 22. In the mounting process, the sealing ring 27 is directly sleeved in the annular concave part 224 of the outer wall of the valve seat 22, and then the valve seat 22 is plugged into the valve seat hole 25. Of course, the annular recess 224 may also be provided on the inner side wall of the valve seat hole 25, or the annular recess 224 may be provided to include a first groove provided on the outer side wall of the valve seat 22 and a second groove provided on the inner side wall of the valve seat hole 25, wherein the first groove and the second groove are adapted, and when the valve seat 22 is fitted into the valve seat hole 25, the first groove and the second groove may just enclose to form a cavity for placing the sealing ring 3. The provision of the annular recess 224 on the outer wall of the valve seat 22 is more convenient to install than the latter two annular recess 224 designs described above.

The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.

Claims

1. The utility model provides a fluid control valve, includes control part, valve body part, the valve body part includes valve body, disk seat, valve rod, case, the disk seat set up in the inner chamber of valve body part, the case set up in the inner chamber, the disk seat is towards one side of case is equipped with the valve port, the cross section of valve port is circular, the valve rod includes body of rod and drive plate, the body of rod with control part transmission connection, the drive plate with the case is connected, the valve rod can drive the case rotates in order to butt or keep away from the valve port, the case includes the spherical, the spherical center of spherical deviates from the central axis of body of rod, when spherical and the valve port butt, the spherical center of spherical is roughly located the central axis of valve port;

the transmission plate comprises a mounting hole, the transmission plate is fixedly connected with the rod body, the valve core comprises a columnar part, a spherical part positioned at one side of the columnar part and a flange part positioned at the other side of the columnar part, the columnar part penetrates through the mounting hole, the spherical part comprises a spherical surface, and the valve core is clamped with the transmission plate;

if the height of the columnar portion is defined as H and the thickness of the transmission plate is defined as T, the following is satisfied: H-T is more than or equal to 0.5mm and less than or equal to 2mm; if the outer diameter of the columnar portion is defined as D1 and the diameter of the mounting hole is defined as D2, the following conditions are satisfied: d1 is less than D2, and D2-D1 is more than or equal to 1mm and less than or equal to 3mm;

the transmission plate further comprises a clamping groove, the clamping groove is communicated with the mounting hole, and if the minimum width of the clamping groove is defined as W, the outer diameter of the columnar part is defined as D1, and the diameter of the mounting hole is defined as D2, the requirements are satisfied: w is less than D1 and less than D2.

2. The fluid control valve according to claim 1, wherein the flange portion includes at least 2 protruding portions extending in a radial direction, a tapered surface is provided on a side of the protruding portion away from the ball portion, and the valve body is integrally formed of a rubber material.

3. The fluid control valve according to claim 1, wherein the flange portion includes a through groove extending in an axial direction, a tapered surface is provided on a side of the flange portion away from the ball portion, and the valve body is integrally formed of a rubber material.

4. A fluid control valve according to any one of claims 1-3, wherein the control member comprises a motor, a connection seat in driving connection with an output shaft of the motor, a groove is formed in one end of the connection seat facing the valve body, a key shaft portion is formed in one end of the rod body facing the control member, the key shaft portion is matched with the groove key groove, a transverse through groove is formed in the other end of the rod body, a rivet hole is formed in one side end portion of the transmission plate, one side end portion of the transmission plate is arranged in the transverse through groove, the rod body is riveted with one side end portion of the transmission plate through a rivet, and a central axis of the rod body is perpendicular to a central axis of the valve port.

5. A fluid control valve according to any one of claims 1 to 3 wherein the valve body includes a valve seat bore, the outer end face of the valve seat bore being circumferentially provided with an axially outwardly extending extension which is in a snap-fit with the outer end face of the valve seat to limit movement of the valve seat axially outwardly thereof within the valve seat bore; the outer end circumference of disk seat is equipped with annular flange, the outer terminal surface of disk seat hole be equipped with annular flange looks adaptation counter bore, annular flange is located in the counter bore in order to restrict the disk seat is in its axial inwards removes in the disk seat hole, just the axial distance between the outer terminal surface of disk seat hole to the bottom of counter bore is not greater than annular flange's thickness.