CN110966434B

CN110966434B - Ball valve

Info

Publication number: CN110966434B
Application number: CN201811150235.3A
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Automotive Components Co Ltd
Current assignee: Zhejiang Sanhua Automotive Components Co Ltd
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2022-09-27
Anticipated expiration: 2038-09-29
Also published as: CN110966434A

Abstract

The invention discloses a ball valve, which comprises a valve body assembly and a valve core, and also comprises a sealing part, wherein the sealing part comprises a first sealing ring and a second sealing ring, one end of the first sealing ring is abutted against the valve core, the other end of the first sealing ring, which is back to the valve core, is provided with an annular groove, at least one part of the second sealing ring is accommodated in the annular groove, one end of the second sealing ring, which is back to the valve core, is abutted against the inner wall of the corresponding valve body assembly, the second sealing ring is abutted against the bottom of the annular groove, the second sealing ring is in a compressed state, the end surface part of the first sealing ring, which is provided with the annular groove, comprises a first annular part and a second annular part, the first annular part is abutted against or contacted with or keeps a certain distance from the inner wall of the corresponding valve body assembly, the first seal ring is in a compressed state. With this arrangement, the service life of the seal member can be improved.

Description

Ball valve

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

The fluid control valve is used as an important component of a heat management system such as a new energy automobile air conditioner regulation system and battery cooling, and has the function of controlling the flow rate and the flow direction of a medium. In order to reduce internal leakage, a sealing ring is generally arranged between the valve core and the interface.

[ summary of the invention ]

The invention provides a ball valve for improving the service life of a sealing ring, which comprises a valve body assembly and a valve core, and further comprises a sealing part, wherein the sealing part comprises a first sealing ring and a second sealing ring, one end of the first sealing ring is abutted against the valve core, the other end of the first sealing ring, which is back to the valve core, is provided with an annular groove, at least one part of the second sealing ring is accommodated in the annular groove, one end of the second sealing ring, which is back to the valve core, is abutted against the inner wall of the corresponding valve body assembly, the second sealing ring is abutted against the bottom of the annular groove, the second sealing ring is in a compressed state, the end surface part of the first sealing ring, which is provided with the annular groove, comprises a first circular ring part and a second circular ring part, the first circular ring part is abutted against or contacted with or keeps a certain distance with the inner wall of the corresponding valve body assembly, the first seal ring is in a compressed state.

The first sealing ring is provided with an annular bulge part towards one end of the valve core, the annular bulge part is abutted against the outer wall part of the valve core, and the first sealing ring further comprises an outer peripheral wall part which is abutted against the corresponding inner wall part of the valve body assembly.

The outer diameter of the outer peripheral wall part is increased and then reduced from the direction back to the valve core, and the position with the largest outer diameter of the outer peripheral wall part is positioned near one end, close to the valve core, of the first sealing ring;

the first sealing ring and the second sealing ring are both made of rubber materials, and the hardness of the second sealing ring is greater than that of the first sealing ring.

The valve body assembly comprises a first valve body part, a first valve body part cavity is formed in the first valve body part, the valve core is arranged in the first valve body part cavity, the first valve body part comprises a valve body part and a valve cover, the valve body part comprises a port part, the valve cover is matched with the port part, at least two opening parts are formed in the peripheral side of the valve body part, a first protruding part protruding out of the inner peripheral wall of the valve body part is arranged on one side, close to the inner bottom of the valve body part, of at least one opening part of the inner peripheral wall of the valve body part, one end, far away from the opening part, of the first protruding part extends to the inner bottom of the valve body part, a first arc part is formed at one end, close to the opening part, of the first protruding part, and the first arc part is located below the one opening part;

the valve gap is in the orientation one side of valve body portion is provided with the second bulge, the second bulge with first bulge sets up relatively, the second bulge is close to the one end of opening is formed with second circular arc portion, first circular arc portion with second circular arc portion cooperatees first circular arc portion with be provided with between the second circular arc portion sealing member, sealing member respectively with first circular arc portion with second circular arc portion compresses tightly the butt.

The inner peripheral wall of the valve body portion is provided with first protruding portions protruding from the inner peripheral wall of the valve body portion on a side of each of the opening portions close to the inner bottom of the valve body portion, and the number of the second protruding portions provided on a side of the valve cover facing the valve body portion is the same as the number of the first protruding portions; the internal perisporium of valve body portion still is provided with the third bulge, the third bulge is followed the interior bottom of valve body portion extends to the top of valve body portion, one side of third bulge with the opening corresponds first bulge is connected, at least some the third bulge is located two between the second bulge, the second bulge is spacing in two between the third bulge.

The thickness of the part, positioned between the two second convex parts, of the third convex part is smaller than or equal to that of the first convex part;

the third protruding part is provided with first convex-concave parts on two sides of one end close to the top of the valve body part, the second protruding part is provided with second convex-concave parts at positions corresponding to the first convex-concave parts, and the first convex-concave parts are matched with the second convex-concave parts.

The valve cover is characterized in that a shoulder is formed at the joint of the part with the small thickness and the part with the large thickness of the third bulge, a fourth bulge is further arranged between the two second bulges and opposite to the shoulder, and one end, facing the valve body, of the fourth bulge is abutted against the shoulder.

First opening, second opening, third opening and fourth opening have been seted up to valve body portion's week side, first valve body part still includes first interface part, second interface part, third interface part and fourth interface part, first interface part is provided with first passageway, the second interface part is provided with the second passageway, the third interface part is provided with the third passageway, the fourth interface part is provided with the fourth passageway, the one end of first interface part with first opening fixed connection and junction are sealed, the one end of second interface part with second opening fixed connection and junction are sealed, the one end of third interface part with third opening fixed connection and junction are sealed, the one end of fourth interface part with fourth opening fixed connection and junction are sealed.

The ball valve further comprises a driving mechanism and a transmission mechanism, the driving mechanism comprises a motor shaft, the transmission mechanism comprises a sun gear and a planet gear, the motor shaft is in transmission connection with the sun gear, the driving mechanism further comprises a stator coil, a rotor and a sleeve, the motor shaft is fixedly connected with the rotor, the transmission mechanism further comprises a first gear ring and a second gear ring, the first gear ring comprises a limiting portion, the valve cover is provided with a limiting column matched with the limiting portion, and when the limiting column is in limiting matching with the limiting portion, the transmission mechanism stops rotating.

The limiting part comprises two arc-shaped holes, at least one part of the limiting column extends into the arc-shaped holes, the inner walls of the arc-shaped holes are in sliding fit with the limiting column, when the limiting column is abutted against the inner wall of one end part of the arc-shaped hole, the transmission mechanism stops rotating, and the two arc-shaped holes are symmetrically distributed by taking the circle center of the first gear ring as the center and are arranged in an arc angle of 90 degrees; the valve body assembly further comprises a second valve body part, and the second gear ring is fixedly connected with the second valve body part or is integrally structured with the second valve body part.

The sealing component of the ball valve comprises the first sealing ring and the second sealing ring, the first sealing ring is matched with the second sealing ring, and when the first sealing ring is worn, the second sealing ring has a compensation effect, so that the service life of the sealing component is prolonged.

Drawings

FIG. 1 is a schematic perspective view of a ball valve according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of the ball valve of FIG. 1;

FIG. 3 is a schematic perspective view of a first body member of the ball valve of FIG. 1;

FIG. 4 is a schematic perspective view of a first body member (without a bonnet) of the ball valve of FIG. 1;

FIG. 5 is a schematic perspective view of a valve cover of the ball valve of FIG. 1;

FIG. 6 is a schematic cross-sectional view of a first body component of the ball valve of FIG. 1;

FIG. 7 is a perspective view of a drive mechanism in the ball valve of FIG. 1;

FIG. 8 is a schematic perspective view of a first ring gear of the ball valve of FIG. 1;

FIG. 9 is a perspective view of the valve cartridge;

FIG. 10 is a perspective view of the valve cartridge from another perspective;

FIG. 11 is a schematic cross-sectional view of the ball valve in a first operating condition;

FIG. 12 is a schematic cross-sectional view of the ball valve in a second operating condition;

FIG. 13 is an enlarged partial view of the cross-sectional view of FIG. 11;

FIG. 14 is a perspective view of a second seal ring;

fig. 15 is a perspective view of the sealing member.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

One embodiment of the present invention is shown in fig. 1 to 15. The ball valve of the present embodiment includes a drive mechanism 10, a valve body assembly 11, a transmission mechanism 12, and a valve element 13.

As shown in fig. 2, the driving mechanism 10 includes a stator coil 1, a motor shaft 2, a rotor 3 and a sleeve 8, the motor shaft 2 is fixedly connected to the rotor 3, the rotor 3 rotates to drive the motor shaft 2 to rotate, the sleeve 8 is a tubular body with a closed end, the sleeve 8 is sleeved with the stator coil 1, and at least a part of the rotor 3 is embedded in the sleeve 8.

As shown in fig. 1 and 2, the valve body assembly 11 includes a first valve body part 4, a second valve body part 6 and a connecting seat 7, the connecting seat 7 includes a tubular body, one side of the second valve body part 6 facing the sleeve 8 is defined as an upper surface portion, the second valve body part 6 is provided with a first through hole 61 at or near the center of the upper surface portion, an annular protrusion 62 is formed around the first through hole 61, the connecting seat 7 is disposed between the sleeve 8 and the second valve body part 6, one end of the connecting seat 7 is sleeved on the annular protrusion 62 and is fixed in a sealing manner by welding or the like, and the other opposite end of the connecting seat 7 extends into one open end of the sleeve 8 and is fixed in a sealing manner by welding or the like. At least a portion of the motor shaft 2 may pass through the first through hole 61.

It should be mentioned here that the connecting socket 7 can also be fixed in a sealing manner to the second valve body part 6 by means of a screw connection.

The ball valve is provided with first bearing 63 in the inside of sleeve 8, and the closed one end of definition sleeve 8 is the top, and the one end of first bearing 63 and the top looks butt of sleeve 8, the outer wall of first bearing 63 and the inner wall interference fit of sleeve 8 for first bearing 63 is spacing in sleeve 8, and the one end of motor shaft 2 stretches into first bearing 63 and is fixed with first bearing 63.

The second bearing 64 is also arranged at the annular bulge 62, part of the second bearing 64 extends into the annular bulge 62 and is fixedly connected with the annular bulge 62, the other end of the motor shaft 2 penetrates through the second bearing 64 and is fixed with the second bearing 64, and through the arrangement of the first bearing 63 and the second bearing 64, the rotating stability of the motor shaft 2 can be improved, and the abrasion can be reduced.

The ball valve further comprises a first chamber 81, it being noted here that the first chamber 81 is formed in the sleeve 8, or that the first chamber 81 is formed between a part of the connecting socket 7, a part of the sleeve 8 and a part of the second valve body part 6, or that the first chamber 81 is otherwise formed between the connecting socket 7, the sleeve 8 and the second valve body part 6; the rotor 3 is located in the first chamber 81 and at least a portion of the motor shaft 2 is located in the first chamber 81. The sealing performance can be improved by sealing and fixing the connecting seat 7, the sleeve 8 and the annular bulge 62 at the matching part. It should be mentioned here that the connecting socket 7 can also be fixed in a sealing manner to the sleeve 8 and the second body part 6 in other conventional ways.

As shown in fig. 2 and 3, the first valve body member 4 includes a valve body portion 40 and a valve cover 5, one end of the valve body portion 40 is open, the valve body portion 40 includes a port portion 45, the port portion 45 is located at the open end of the valve body portion 40, the end defining the opening of the valve body portion 40 is a top portion, the opposite end is a bottom portion, and the valve cover 5 is fitted to the port portion 45.

As shown in fig. 2, a first body member chamber 50 is formed in the valve body 40, and it should be noted here that the first body member chamber 50 is formed between a portion of the valve body 40 and a portion of the bonnet 5, or the first body member chamber 50 is formed between the valve body 40 and the bonnet 5 in other forms. The valve spool 13 is received in the first valve body member chamber 50.

As shown in fig. 4, the valve body 40 further has a first opening 401, a second opening 402, a third opening 403, and a fourth opening 404, the first opening 401, the second opening 402, the third opening 403, and the fourth opening 404 are provided on the circumferential side of the valve body 40 in the order of clockwise or counterclockwise, and in the present embodiment, the first opening 401, the second opening 402, the third opening 403, and the fourth opening 404 are provided symmetrically with respect to the center of the valve body 40.

The first valve body member 4 further includes a first connection port 41, a second connection port 42, a third connection port 43, and a fourth connection port 44, wherein one end of the first connection port 41 is fixedly connected to the first opening 401 and the joint is sealed, one end of the second connection port 42 is fixedly connected to the second opening 402 and the joint is sealed, one end of the third connection port 43 is fixedly connected to the third opening 403 and the joint is sealed, and one end of the fourth connection port 44 is fixedly connected to the fourth opening 404 and the joint is sealed.

As shown in fig. 4, the valve body portion 40 further includes an inner bottom portion 47, a first protruding portion 411 is provided on the inner peripheral wall of the valve body portion 40 near one side of the first opening portion 401 close to the inner bottom portion 47, the first protruding portion 411 protrudes inward relative to the inner peripheral wall of the valve body portion 40, one end of the first protruding portion 411, which is far away from the first opening portion 401, extends to the inner bottom portion 47, a first arc portion 412 is formed at one end of the first protruding portion 411, which is close to the first opening portion 401, and the first arc portion 412 is located below the first opening portion 401. The central axis corresponding to the first arc portion 412 coincides with or approximately coincides with the central axis of the first opening portion 401, the size of the central angle corresponding to the first arc portion 412 is not specifically limited, and in the present embodiment, the central angle corresponding to the first arc portion 412 is 180 °, which is advantageous for the demolding process during injection molding of the valve body portion 40.

As shown in fig. 4 and 5, the valve cap 5 is provided with a second protruding portion 511 on a side facing the valve body portion 40, the second protruding portion 511 is disposed opposite to the first protruding portion 411, the second protruding portion 511 is located above the first protruding portion 411, a second arc portion 512 is formed at one end of the second protruding portion 511 close to the first opening portion 401, the second arc portion 512 is disposed opposite to the first arc portion 412, a central axis corresponding to the second arc portion 512 is coincident with or approximately coincident with a central axis of the first opening portion 401, and a size of a central angle corresponding to the second arc portion 512 is not specifically limited, and in the present embodiment, the central angle corresponding to the second arc portion 512 is 180 °.

As shown in fig. 6, the first arc portion 412 and the second arc portion 512 cooperate to form a cylindrical space 60. As shown in fig. 2, a sealing member 90 is further provided in the space 60, the sealing member 90 is limited by the first arc portion 412 and the second arc portion 512, the inner diameter of the sealing member 90 is larger than the opening diameter of the first opening portion 401 and larger than the diameter of the internal passage of the valve element 13, one end of the sealing member 90 abuts against the inner wall corresponding to the valve body portion 40, the opposite end of the sealing member 90 abuts against the outer wall corresponding to the valve element 13, and the sealing member 90 further abuts against the first arc portion 412 and the second arc portion 512 in a pressing manner.

Generally, in order to install the sealing component, the first opening part and the first valve body part are separated, the sealing component is installed through the joint of the first opening part and the first valve body part, the sealing component needs to be installed into the first valve body part firstly, then the first opening part and the first valve body part are fixed through welding, screwing and the like, and the direction of installing the valve core into the first valve body part is not consistent with the direction of installing the sealing component into the first valve body part. In this embodiment, the first arc portion 412 and the second arc portion 512 are matched to limit the sealing member 90, the first protruding portion 411 and the second protruding portion 511 are arranged on the valve body 40, so that the sealing member 90 is easy to assemble, the valve element 13 and the sealing member 90 are both installed in the first valve body from the port portion 45, and the installation of parts is simple.

The ball valve is formed with a cylindrical space in the second opening 402, the third opening 403 and the fourth opening 404 in the same or similar manner, and is provided with a sealing member, which is not described in detail herein.

As shown in fig. 2, the ball valve has a second body member cavity 65 formed in the second body member 6. it should be noted here that the second body member cavity 65 may be formed between a portion of the second body member 6 and a portion of the bonnet 5, or the second body member cavity 65 may be otherwise formed between the second body member 6 and the bonnet 5. One end of the second valve body part 6 is fixedly connected with the connecting seat 7, the other end of the second valve body part 6 is fixedly connected with the valve body part 40, for example, through bolts, the second valve body part 6 is fixedly connected with the valve body part 40, and here, it should be noted that the second valve body part 6 and the valve body part 40 can also be fixedly connected through other forms such as welding.

One end of the second valve body member 6 fixed to the valve body portion 40 is partially abutted against the circumferential edge portion of the valve cover 5, and the valve cover 5 can be secured in a limited manner by the abutment.

As shown in fig. 3, the end surface portion of the port portion 45 of the valve body portion 40 is further provided with an annular groove 450, and the annular groove 450 is provided with a gasket, thereby improving the sealability at the junction of the second valve body member 6 and the valve body portion 40. It should be noted here that when the second valve body member 6 is fixed to the valve body portion 40 by welding, a gasket may not be provided.

As shown in fig. 2 and 7, the transmission mechanism 12 is at least partially located in the second valve body component cavity 65, the transmission mechanism 12 includes the sun gear 20, the planetary gears 21, the first gear ring 22, the second gear ring 23, the first mounting plate 24, the second mounting plate 25 and the gear shaft 26, the number of the planetary gears 21 is three in the present embodiment, the number of the corresponding gear shafts 26 is also three, the first mounting plate 24 and the second mounting plate 25 may be circular ring structures, the central circular through hole of the first mounting plate facilitates the matching of the motor shaft 2 with the sun gear 20, the three planetary gears 21 are rotatably arranged between the first mounting plate 24 and the second mounting plate 25 through the gear shaft 26, and all three planetary gears 21 are in meshing connection with the sun gear 20.

The first gear ring 22 and the second gear ring 23 both have an internal toothing, one end of the planet wheels 21 being in meshing connection with the first gear ring 22 at the internal toothing of the first gear ring 22, and the opposite end of the planet wheels 21 being in meshing connection with the second gear ring 23 at the internal toothing of the second gear ring 23. The second ring gear 23 is fixedly connected to the second body part 6 on the side facing away from the planet gears 2, for example by being mounted to the second body part 6 in an interference or positive-locking manner.

It should be noted here that when the second valve body part 6 and the second ring gear 23 are both made of a plastic material, the second ring gear 23 may be integrally formed with the second valve body part 6, for example, by an injection molding process, so that the number of parts of the ball valve is reduced and the assembly is more convenient.

At least part of the motor shaft 2 penetrating through the first through hole 61 is in transmission connection with the transmission mechanism 12, and it should be noted here that the motor shaft 2 and the sun gear 20 can be in interference crimping or clamping connection, and when the motor shaft 2 rotates, the sun gear 20 rotates synchronously, and then the planet gear and the gear ring are driven to rotate.

As shown in fig. 8, the first gear ring 22 further includes a limiting portion, the limiting portion is disposed on one side of the first gear ring 22 facing the valve core 13, the limiting portion includes at least one arc-shaped hole 32, in this embodiment, the limiting portion includes two arc-shaped holes 32, and the two arc-shaped holes 32 are symmetrically distributed with a center of a circle of the first gear ring 22 as a center. Two limiting columns 31 matched with the arc-shaped holes 32 are arranged on one side, facing the first gear ring 22, of the valve cover 5, and the limiting columns 31 and the valve cover 5 can be fixed in a welding mode or the like, or the limiting columns 31 and the valve cover 5 can also be of an integrated structure.

Spacing post 31 at least part stretches into arc hole 32, sliding fit between the inner wall in arc hole 32 and spacing post 31, it is spacing through the inner wall cooperation with arc hole 32, the rotation range of first ring gear 22 can be restricted to the both ends in arc hole 32, when first ring gear 22 clockwise turning, when one of them tip inner wall in arc hole 32 and spacing post 31 looks butt, first ring gear 22 stall on clockwise, the rotation range of first ring gear 22 can be restricted through setting up the arc angle size between the arc hole both ends under the general condition.

In the present embodiment, the arc angle of the arc hole 32 is set to 90 °, and here it should be understood that the arc angle can be adaptively set in different working environments. At the same transmission ratio, the transmission mechanism has a relatively compact structure and small volume, so that the volume of the ball valve is relatively reduced.

As shown in fig. 2, the ball valve further includes a valve rod 30, in this embodiment, as shown in fig. 8, the first gear ring 22 has a central hole 220, one end of the valve rod 30 and the central hole 220 may be pressed by interference or the central hole 220 may be provided in a special shape, accordingly, the shape of the valve rod 30 is matched to realize rotational driving, the other opposite end of the valve rod 30 is in transmission connection with the valve core 13 or the valve rod 30 and the valve core 13 are an integral structure, and when the valve rod 30 rotates, the valve rod 30 drives the valve core 13 to rotate together. It should be noted here that the valve element 13 may also be provided with a locking groove, and the valve rod 30 is matched with the locking groove to realize the rotation driving.

The working principle is as follows: when motor shaft 2 clockwise turning, drive sun gear 20 clockwise turning, connect through the meshing and drive planet wheel 21 and rotate, second ring gear 23 is fixed, planet wheel 21 is in the time of its self axis pivoted, still make circumferential direction with sun gear 1, use motor shaft 2 to rotate as the center promptly, and rotate with second ring gear 23 meshing, and then drive first ring gear 22 and rotate, valve rod 30 rotates with first ring gear 22 simultaneously, turned angle is from 0 ~ 90, when an end inner wall of arc hole 32 and spacing post 31 butt, first ring gear 22 stall in its pivoted direction, the same reason is in the anticlockwise rotation of motor shaft 2, give unnecessary here and describe repeatedly.

As shown in fig. 9, the spool 13 is provided with a step 130 at a connection with the stem 30, the step 130 including a large diameter portion 131 and a small diameter portion 132, the large diameter portion 131 being located between the small diameter portion 132 and the spool 13. As shown in fig. 5, the bonnet 5 has a second through hole 51 formed at or near the center thereof, the stem 30 passes through the second through hole 51, and the bonnet 5 abuts against the large diameter portion 131.

As shown in fig. 10, the valve core 13 is further provided with a circular protrusion 133 on a side facing the bottom of the valve body portion 40, as shown in fig. 2, the inner wall of the first valve body part 4 is provided with a cylindrical protrusion 49 at a position corresponding to the circular protrusion 133, the circular protrusion 133 is sleeved on the cylindrical protrusion 49, and the circular protrusion 133 is in clearance fit with the cylindrical protrusion 49. The valve cover 5 is abutted against the large-diameter part 131, and the circular ring bulge 133 is matched with the cylindrical bulge 49, so that the valve core 13 is limited, and the valve core 13 can be prevented from deflecting in the rotating process.

As shown in fig. 11, the first connection port 41 is provided with a first passage 71, the second connection port 42 is provided with a second passage 72, the third connection port 43 is provided with a third passage 73, the fourth connection port 44 is provided with a fourth passage 74, and the valve core 13 is internally provided with a first valve core passage 14 and a second valve core passage 15, and the ball valve of the present invention includes at least two working states: a first operating state in which, as shown in fig. 11, the first passage 71 communicates with the second passage 72 through the first spool passage 14, and the third passage 73 communicates with the fourth passage 74 through the second spool passage 15; in the second operating state, as shown in fig. 12, the first passage 71 communicates with the fourth passage 74 through the first spool passage 14, and the second passage 72 communicates with the third passage 73 through the second spool passage 15.

As shown in fig. 13 to 15, the sealing member 90 includes a first sealing ring 91 and a second sealing ring 92, one end of the first sealing ring 91 abuts against the valve element 13, an end surface portion of the first sealing ring 91 facing away from one end of the valve element 13 is provided with an annular groove 93, a first annular portion 96 and a second annular portion 97, the annular groove 93 is located between the first annular portion 96 and the second annular portion 97, as shown in fig. 14, the second sealing ring 92 includes an annular body, at least a part of the second sealing ring 92 is accommodated in the annular groove 93, the second sealing ring 92 abuts against a bottom of the annular groove 93, and one end of the second sealing ring 92 facing away from the valve element 13 abuts against an inner wall of the valve body portion 40 corresponding thereto. It should be noted here that both the first sealing ring 91 and the second sealing ring 92 may be made of rubber material, and the second sealing ring 92 has a greater hardness, i.e. the elastic modulus of the second sealing ring 92 is greater than that of the first sealing ring 91, and the second sealing ring 92 can support the first sealing ring 91.

It should be further noted that, when the sealing member 90 is assembled into the ball valve, the sealing member 90 is subjected to a pressing force F1 in the axial direction, and as shown in fig. 13, the first sealing ring 91 and the second sealing ring 92 have a certain axial compression amount, and at this time, the first annular portion 96 is in contact with or contacts or keeps a certain distance from the inner wall of the corresponding valve body portion 40. When the first seal ring 91 is worn, the axial direction pressing force F1 applied to the seal member 90 is correspondingly reduced, and because the elastic modulus of the second seal ring 92 is large, the second seal ring 92 preferentially recovers the compression amount, so that the effect of compensating for the wear can be achieved, and the service life of the seal member 90 is improved.

As shown in fig. 13 and 15, the first seal ring 91 is provided with a truncated conical surface portion 94 at one end facing the valve element 13, the truncated conical surface portion 94 is attached to the outer wall portion of the valve element 13, and the taper of the truncated conical surface portion 94 is adapted to the outer wall portion of the valve element 13, the first seal ring 91 further includes an outer peripheral wall portion 95, and the outer peripheral wall portion 95 is at least partially arranged in an interference manner, where it should be noted that the interference manner means that the outer diameter of the outer peripheral wall portion 95 is larger than the diameter of the space 60.

In the present embodiment, the outer diameter of the outer peripheral wall portion 95 increases and then decreases from the direction away from the valve element 13, the maximum value of the outer diameter of the outer peripheral wall portion 95 is larger than the diameter of the space 60, and the maximum outer diameter of the outer peripheral wall portion 95 is located near one end of the first seal ring 91 close to the valve element 13, so that after the sealing member 90 is assembled into the ball valve, the outer peripheral wall portion 95 abuts against the inner wall portion of the corresponding valve element 40, the first seal ring 91 is subjected to the radial pressing force F2, and as shown in fig. 13, the resultant force F of the axial pressing force F1 and the radial pressing force F2 is perpendicular or approximately perpendicular to the truncated conical surface portion 94, so that the truncated conical surface 94 is more closely attached to the outer wall portion of the valve element 13, thereby improving the sealing performance of the ball valve.

The truncated conical surface 94 includes an annular protrusion 96, the annular protrusion 96 can be closely attached to the outer wall of the valve element 13, and a line seal is formed between the annular protrusion 96 and the outer wall of the valve element 13, so as to further improve the sealing performance of the ball valve. It should be noted here that the surface of the truncated conical surface portion 94 may also be coated with a polytetrafluoroethylene layer, which can improve the wear resistance of the truncated conical surface portion 94.

As shown in fig. 4, the inner peripheral wall of the valve body portion 40 is further provided with a third protruding portion 46 between the first opening portion 401 and the second opening portion 402, the third protruding portion 46 extends from the inner bottom 47 of the valve body portion 40 to the top of the valve body portion 40, in the present embodiment, one side of the third protruding portion 46 is smoothly connected or approximately smoothly connected to the first protruding portion 411 corresponding to the first opening portion 401, and the opposite side of the third protruding portion 46 is smoothly connected or approximately smoothly connected to the first protruding portion 411 corresponding to the second opening portion 402. At least a part of the third protrusion 46 is located between the two second protrusions 511, and the second protrusion 511 is limited between the two third protrusions 46, so that the valve cover 5 and the valve body 40 can be prevented from rotating relatively.

It should be noted that the third protrusion 46 may not be provided, and other conventional manners may be adopted to prevent the valve cover 5 and the valve body 40 from rotating relatively, such as a limit fit, a bolt connection, and the like.

The third protruding part 46 is provided with first protruding and recessed parts 461 at both sides of one end near the top of the valve body part 40, the second protruding part 511 is provided with second protruding and recessed parts 513 at the positions corresponding to the first protruding and recessed parts 461, and the first protruding and recessed parts 461 and the second protruding and recessed parts 513 are matched, so that the valve cover 5 and the valve body part 40 are combined more firmly.

The thickness of the portion of the third protruding portion 46 between the two second protruding portions 511 is smaller than that of the first protruding portion 411, and a shoulder 460 is formed at the junction of the portion of the third protruding portion 46 with the smaller thickness and the portion with the larger thickness. The valve cover 5 is further provided with a fourth bulge 48 between the two second bulges 511, and two sides of the fourth bulge 48 are smoothly connected or approximately smoothly connected with the second bulges 511. The fourth protruding portion 48 is disposed opposite to the shoulder 460, and one end of the fourth protruding portion 48 facing the valve body portion 40 abuts against the shoulder 460, so that the valve cover 5 can be limited.

Third protrusions and recesses of the third protrusions are disposed between the second opening 402 and the third opening 403, between the third opening 403 and the fourth opening 404, and between the fourth opening 404 and the first opening 401 in the same or similar manner, and the valve cover 5 is also disposed with corresponding protrusions and recesses in the same or similar manner, which are not described in detail herein.

As shown in fig. 5, the valve cap 5 is further provided with a third through hole 52, one end of the third through hole 52 communicates with the first body member chamber 50, the other end of the third through hole 52 communicates with the second body member chamber 65, and the second body member chamber 65 communicates with the first body member chamber 50 through the third through hole 52, so that the pressure difference between the second body member chamber 65 and the first body member chamber 50 can be balanced, and the driving force required to drive the valve element 13 can be reduced.

It should be noted that: although the present invention has been described in detail with reference to the above embodiments, those skilled in the art will understand that modifications and equivalents may be made thereto without departing from the spirit and scope of the invention, and all such modifications and improvements are intended to be included within the scope of the following claims.

Claims

1. A ball valve comprises a valve body assembly and a valve core and is characterized by further comprising a sealing part, wherein the sealing part comprises a first sealing ring and a second sealing ring, one end of the first sealing ring is abutted to the valve core, an annular groove is formed in the other end, facing away from the valve core, of the first sealing ring, at least one part of the second sealing ring is accommodated in the annular groove, one end, facing away from the valve core, of the second sealing ring is abutted to the inner wall of the corresponding valve body assembly, the second sealing ring is abutted to the bottom of the annular groove and is in an axial compression state, the first sealing ring comprises an outer peripheral wall portion, at least one part of the outer peripheral wall portion is abutted to the corresponding inner wall of the valve body assembly, and the first sealing ring is in a radial compression state.

2. The ball valve according to claim 1, wherein an end of the first seal ring facing the spool is provided with an annular protrusion, which abuts against an outer wall portion of the spool.

3. The ball valve according to claim 2, wherein the outer diameter of the outer peripheral wall portion increases and then decreases from a direction away from the spool, and the outer diameter of the outer peripheral wall portion is the largest located near one end of the first seal ring close to the spool;

4. The ball valve according to any one of claims 1-3, wherein the valve body assembly includes a first valve body member, the first valve body component is provided with a first valve body component cavity, the valve core is arranged in the first valve body component cavity, the first valve body part comprises a valve body part and a valve cover, the valve body part comprises a port part, the valve cover is matched with the port part, the periphery of the valve body part is provided with at least two opening parts, the inner peripheral wall of the valve body part is provided with a first bulge part which is bulged from the inner peripheral wall of the valve body part on one side of at least one opening part close to the inner bottom of the valve body part, one end, far away from the opening part, of the first protruding part extends to the inner bottom of the valve body part, a first arc part is formed at one end, close to the opening part, of the first protruding part, and the first arc part is located below one of the opening parts;

the valve gap is at the orientation one side of valve body portion is provided with the second bulge, the second bulge with first bulge sets up relatively, the second bulge is close to the one end of opening is formed with second circular arc portion, first circular arc portion with second circular arc portion cooperatees first circular arc portion with be provided with between the second circular arc portion sealing member, sealing member respectively with first circular arc portion with second circular arc portion compresses tightly the butt.

5. The ball valve according to claim 4, wherein a first opening portion is opened on a peripheral side of the valve body portion, the first projecting portion projecting from the inner peripheral wall of the valve body portion is provided on a side of each of the opening portions close to an inner bottom of the valve body portion, and the number of the second projecting portions provided on a side of the valve cover facing the valve body portion is the same as the number of the first projecting portions; the internal perisporium of valve body portion still is provided with the third bulge, the third bulge is followed the interior bottom of valve body portion extends to the top of valve body portion, one side of third bulge with first opening corresponds first bulge is connected, at least some the third bulge is located two between the second bulge, the second bulge is spacing in two between the third bulge.

6. The ball valve according to claim 5, wherein the thickness of the portion of the third protrusion between the two second protrusions is less than or equal to the thickness of the first protrusion;

7. The ball valve according to claim 6, wherein a shoulder is formed at a junction of the portion with the small thickness and the portion with the large thickness of the third protrusion, and a fourth protrusion is further disposed between the second protrusions of the valve cover, the fourth protrusion being disposed opposite to the shoulder, and an end of the fourth protrusion facing the valve body abuts against the shoulder.

8. The ball valve according to claim 7, wherein a first opening portion, a second opening portion, a third opening portion and a fourth opening portion are opened at a peripheral side of the valve body portion, the first valve body component further comprises a first interface part, a second interface part, a third interface part and a fourth interface part, the first interface part is provided with a first channel, the second interface part is provided with a second channel, the third interface part is provided with a third channel, the fourth interface part is provided with a fourth channel, one end of the first interface part is fixedly connected with the first opening part, and the joint of the first interface part and the first opening part is sealed, one end of the second interface part is fixedly connected with the second opening part, the joint of the second interface part and the second opening part is sealed, one end of the third interface part is fixedly connected with the third opening part, the joint of the third interface part and the third opening part is sealed, and one end of the fourth interface part is fixedly connected with the fourth opening part, and the joint of the fourth interface part and the fourth opening part is sealed.

9. The ball valve according to claim 8, wherein the ball valve further comprises a driving mechanism and a transmission mechanism, the driving mechanism comprises a motor shaft, the transmission mechanism comprises a sun gear and a planet gear, the motor shaft is in transmission connection with the sun gear, the driving mechanism further comprises a stator coil, a rotor and a sleeve, the motor shaft is fixedly connected with the rotor, the transmission mechanism further comprises a first gear ring and a second gear ring, the first gear ring comprises a limiting portion, the valve cover is provided with a limiting column matched with the limiting portion, and when the limiting column is in limiting matching with the limiting portion, the transmission mechanism stops rotating.

10. The ball valve according to claim 9, wherein the limiting portion includes two arc-shaped holes, at least a portion of the limiting post extends into the arc-shaped holes, an inner wall of the arc-shaped hole is in sliding fit with the limiting post, when the limiting post abuts against an inner wall of one end portion of the arc-shaped hole, the transmission mechanism stops rotating, and the two arc-shaped holes are symmetrically distributed with a center of the first gear ring as a center and are arranged at an arc angle of 90 degrees; the valve body assembly further comprises a second valve body component, and the second gear ring is fixedly connected with the second valve body component or is integrally structured with the second valve body component.