阅读说明：本技术 一种分水阀及其冲水马桶 (Water diversion valve and flush toilet thereof ) 是由 郭定黎 孟建刚 牟雄斌 于 2020-08-27 设计创作，主要内容包括：本发明提供了一种分水阀及其冲水马桶,属于水阀制造技术领域。它解决了现有分水阀阀芯摩擦力大、容易磨损。本分水阀,包括阀体,阀体内开设有呈圆柱状的安装腔,阀体的外侧面上分别连接有进水管、第一出水管和第二出水管,进水管、第一出水管和第二出水管均与安装腔相连通,安装腔内设有呈圆柱状的阀芯,阀芯上开设有贯穿其两侧的过水通道,阀芯的底部具有与安装腔底部相接触的环形凸起或若干个球形凸起,阀体上还固设有能够带动阀芯转动的驱动件。本发明降低了分水阀内阀芯的摩擦力从而减少磨损。(The invention provides a water diversion valve and a flush toilet thereof, and belongs to the technical field of water valve manufacturing. The valve core of the existing shunt valve is large in friction force and easy to wear. This water diversion valve, including the valve body, it is cylindric installation cavity to have seted up in the valve body, be connected with the inlet tube on the lateral surface of valve body respectively, first outlet pipe and second outlet pipe, the inlet tube, first outlet pipe and second outlet pipe all are linked together with the installation cavity, be equipped with in the installation cavity and be cylindric case, set up the water channel who runs through its both sides on the case, the bottom of case has the annular arch or a plurality of spherical arch that contact bottom the installation cavity, still set firmly on the valve body and can drive case pivoted driving piece. The friction force of the valve core in the shunt valve is reduced, so that the abrasion is reduced.)

1. The water diversion valve comprises a valve body (1), and is characterized in that a cylindrical installation cavity (11) is formed in the valve body (1), a water inlet pipe (2), a first water outlet pipe (3) and a second water outlet pipe (4) are connected to the outer side surface of the valve body (1) respectively, and the water inlet pipe (2), the first water outlet pipe (3) and the second water outlet pipe (4) are communicated with the installation cavity (11); a cylindrical valve core (5) is arranged in the mounting cavity (11), and a water passing channel (51) penetrating through two sides of the valve core (5) is formed in the valve core (5); the bottom of the valve core (5) is provided with an annular bulge (52) or a plurality of spherical bulges which are contacted with the bottom of the installation cavity (11); and the valve body (1) is also fixedly provided with a driving piece (6) which can drive the valve core (5) to rotate.

2. The shunt valve of claim 1, wherein the outer peripheral surface of the valve core (5) is respectively provided with a first annular groove (53) and a second annular groove (54) along the circumferential direction of the valve core, the first annular groove (53) and the second annular groove (54) are arranged at intervals, the water passage (51) is positioned between the first annular groove (53) and the second annular groove (54), a first sealing ring (7) is embedded in the first annular groove (53), and a second sealing ring (8) is embedded in the second annular groove (54).

3. The shunt valve of claim 2, wherein a gap is formed between the outer peripheral surface of the valve core (5) and the inner wall of the installation cavity (11), a plurality of ribs (55) are arranged on the outer peripheral surface of the valve core (5) along the axial direction of the valve core, the ribs (55) are distributed at intervals along the circumferential direction of the valve core (5), and the ribs (55) are positioned between the first annular groove (53) and the second annular groove (54).

4. The shunt valve according to claim 1, 2 or 3, wherein one end of the water passage (51) is a water inlet (51a), the other end of the water passage is a water outlet (51b), the water inlet (51a) and the water outlet (51b) are respectively positioned on the outer peripheral surfaces of two sides of the valve core (5), and the aperture of the water inlet (51a) is larger than that of the water outlet (51 b); the water inlet pipe (2) is located on one side of the valve body (1), and the first water outlet pipe (3) and the second water outlet pipe (4) are arranged on the other side of the valve body (1) at intervals.

5. The shunt valve of claim 4, wherein the water outlet (51b) is defined as a length direction along a circumferential direction of the valve core (5), and the water outlet (51b) is defined as a width direction along an axial direction of the valve core (5); the initial width of one end, close to the second water outlet pipe (4), of the water outlet (51b) is larger than the initial width of one end, close to the first water outlet pipe (3), of the water outlet (51 b).

6. The shunt valve of claim 1, 2 or 3, wherein a connecting flange (9) is fixedly connected to the valve body (1), the driving member (6) is a driving motor and is fixedly arranged on the connecting flange (9), a valve rod (56) is arranged at the upper end of the valve core (5), and an output shaft of the driving motor is connected with the valve rod (56).

7. The shunt valve of claim 6, wherein the connecting flange plate (9) has a mounting through hole (91) in the middle, the valve rod (56) is inserted into the mounting through hole (91), a mounting step (92) is provided on the inner wall of the mounting through hole (91), an abutting step (56a) corresponding to the mounting step (92) is provided on the outer circumferential surface of the valve rod (56), and a third sealing ring (10) is embedded between the mounting step (92) and the abutting step (56 a).

8. The shunt valve of claim 6, wherein a cylinder (93) is arranged on the inner side of the connecting flange (9) along the axial direction of the connecting flange, the cylinder (93) extends into the mounting cavity (11) of the valve body (1), an annular groove III (93a) is formed in the outer peripheral surface of the cylinder (93) along the circumferential direction of the cylinder, a sealing ring IV (1a) is embedded in the annular groove III (93a), and the sealing ring IV (1a) abuts against and contacts with the inner wall of the mounting cavity (11).

9. The shunt valve of claim 1, 2 or 3, wherein the bottom edge of the mounting cavity (11) of the valve body (1) is provided with an annular boss (12), and one side of the annular boss (12) is provided with a notch (12 a); the annular projection (52) is located within the annular boss (12); an extending lug (57) is arranged from the outer side of the annular bulge (52) to the outer peripheral surface of the valve core (5), the extending lug (57) is movably arranged in the gap (12a), and two sides of the extending lug (57) can be respectively abutted against and contacted with two side walls of the gap (12 a); both ends of the valve core (5) are provided with concave cavities (58), and reinforcing rib plates (59) connected with both side walls of the concave cavities (58) are arranged in the concave cavities (58).

10. A toilet bowl comprising a diverter valve as claimed in any one of claims 1 to 9.

Technical Field

The invention belongs to the technical field of water valve manufacturing, and relates to a water dividing valve and a flushing closestool thereof.

Background

The water valve is a common product in daily life, and the shunt valve is one kind of water valve, and it can divide into many water routes with a water route to the play water direction of rivers is converted according to people's demand, makes people can use the play water mode of different functions according to the demand of oneself, has obtained more application in bathroom water pipe and kitchen water pipe. The existing double-waterway flushing toilet is also provided with a shunt valve, the toilet adopts double waterways for flushing, one part of water flows out from the side ring surface of the upper part of the ceramic, namely side flushing, the surface of the upper part of the ceramic is cleaned, and the other part of water is sprayed out from the bottom of the ceramic so as to form siphon, so that dirt is flushed away by utilizing the siphon principle. Because only one waterway enters the closestool, a shunt valve is needed to realize the shunt of the waterway.

Chinese patent (publication number: CN 209099473U; granted publication date: 2019-07-12) discloses a shunt valve for flushing a closestool, which comprises a body, a ball valve and a motor, wherein the body is internally provided with an accommodating cavity, and the body is provided with a water inlet, a side flushing opening and a siphon opening; the ball valve is positioned in the accommodating cavity, a water inlet channel and a water outlet channel which are mutually communicated are arranged on the ball valve, and the water inlet channel is communicated with the water inlet; the motor controls the rotation of the ball valve, and the water outlet channel is communicated with the side flushing port or the siphon port; the ball valve is connected with the ball valve through a transmission device, the transmission device comprises a transmission shaft, a first groove is formed in one end face of the transmission shaft, and an output shaft of the motor is inserted into the transmission shaft; the end of the transmission shaft departing from the first groove penetrates through the body to be connected with the ball valve.

The valve core of the shunt valve in the patent document adopts a ball valve structure, the contact area between the surface of the ball valve and the cavity wall of the accommodating cavity in the body is large, the friction force between the surface of the ball valve and the cavity wall is large, and the ball valve is not easy to rotate and is easy to wear; in addition, a gap is inevitably formed between the surface of the ball valve and the wall of the accommodating cavity in the body, if the gap is too large, the water mixing phenomenon can occur, the dimensional precision requirement of the assembly of the ball valve and the accommodating cavity is high, the control is difficult, and the process difficulty is high.

Disclosure of Invention

The invention provides a water diversion valve according to the problems in the prior art, and the technical problems to be solved by the invention are as follows: how to reduce the friction force of the valve core in the shunt valve so as to reduce the abrasion.

The purpose of the invention can be realized by the following technical scheme:

a water diversion valve comprises a valve body and is characterized in that a cylindrical installation cavity is formed in the valve body, a water inlet pipe, a first water outlet pipe and a second water outlet pipe are respectively connected to the outer side surface of the valve body, and the water inlet pipe, the first water outlet pipe and the second water outlet pipe are communicated with the installation cavity; a cylindrical valve core is arranged in the mounting cavity, and a water passing channel penetrating through two sides of the valve core is formed in the valve core; the bottom of the valve core is provided with an annular bulge or a plurality of spherical bulges which are contacted with the bottom of the installation cavity; and the valve body is also fixedly provided with a driving piece which can drive the valve core to rotate.

The principle is as follows: when the shunt valve in the technical scheme is used, the water passing channel can be communicated with the water inlet pipe and the first water outlet pipe or the water inlet pipe and the second water outlet pipe, in an initial state, the position of the valve core enables the water passing channel to be communicated with the water inlet pipe and the first water outlet pipe, at the moment, when a main valve of the water inlet pipe is opened, water flows into the water passing channel from the water inlet pipe, and then water flows out from the first water outlet pipe; then the driving piece drives the valve core to rotate for a certain angle, so that the water passing channel on the valve core is communicated with the water inlet pipe and the second water outlet pipe, and water flows out of the second water outlet pipe; finally, the driving piece drives the valve core to reversely rotate and reset. The valve core adopts cylindrical structure among this technical scheme, and the bottom of case adopts annular protrusion or spherical protrusion and valve body contact, for current ball valve structure, the inner wall contact surface of case and installation cavity is changed into line contact or point contact by the face contact for frictional area greatly reduced between the two, thereby reduced frictional force, reduced the wearing and tearing phenomenon. The water dividing valve is simple in structure, low in cost, smooth in waterway conversion in the using process and basically free of noise.

In the shunt valve, the outer peripheral surface of the valve core is respectively provided with a first annular groove and a second annular groove along the circumferential direction of the valve core, the first annular groove and the second annular groove are arranged at intervals, the water passing channel is positioned between the first annular groove and the second annular groove, the first annular groove is embedded with a first sealing ring, and the second annular groove is embedded with a second sealing ring. The first sealing ring and the second sealing ring are preferably star-shaped sealing rings, dynamic sealing is formed between the outer peripheral surface of the valve core and the inner wall of the mounting cavity by the first sealing ring and the second sealing ring, when the valve core rotates or is static, water flowing through the water channel can be effectively prevented from flowing out from the outer peripheral surface of the valve core and the inner wall of the mounting cavity, accordingly, the overflow phenomenon is reduced, meanwhile, the requirement for assembly precision between the valve core and the valve body is lowered, a large gap can be formed between the outer peripheral surface of the valve core and the inner wall of the mounting cavity, and friction and abrasion between the outer peripheral surface of the.

In the shunt valve, a gap is formed between the outer peripheral surface of the valve core and the inner wall of the installation cavity, a plurality of convex ribs along the axial direction of the valve core are arranged on the outer peripheral surface of the valve core, the convex ribs are distributed at intervals along the circumferential direction of the valve core, and the convex ribs are positioned between the first annular groove and the second annular groove. Therefore, a larger gap can be formed between the outer peripheral surface of the valve core and the inner wall of the mounting cavity, a proper gap is formed between the outer surface of the convex rib and the inner wall of the mounting cavity by controlling the size of the convex rib, the precision of the valve core is easy to control relative to the whole cylindrical surface, the processing difficulty is small, and a smaller overflowing gap is formed between the valve core and the valve body while the normal rotation of the valve core is ensured; the water leakage phenomenon formed by the water flow flowing along the circumferential direction between the outer circumferential surface of the valve core and the inner wall of the mounting cavity is effectively reduced. And the surface contact between the outer peripheral surface of the valve core and the inner wall of the mounting cavity is changed into line contact, so that even if assembly errors exist, the contact area between the valve core and the valve body can be ensured to be reduced, and further friction and abrasion are reduced.

In the shunt valve, one end of the water passing channel is a water inlet, the other end of the water passing channel is a water outlet, the water inlet and the water outlet are respectively positioned on the peripheral surfaces of two sides of the valve core, and the caliber of the water inlet is larger than that of the water outlet; the water inlet pipe is located on one side of the valve body, and the first water outlet pipe and the second water outlet pipe are arranged on the other side of the valve body at intervals. The size of the water inlet along the circumferential direction of the valve core is larger, and when the valve core rotates, the water inlet is always communicated with the water inlet pipe; the water outlet is communicated with the first water outlet pipe when in the initial position, the valve core is driven by the driving piece to rotate, the water outlet is communicated with the second water outlet pipe, and the caliber of the water outlet is equal to or slightly larger than the calibers of the water inlet ports of the first water outlet pipe and the second water outlet pipe; the caliber of the water outlet is overlarge, so that water flowing out of the water channel impacts on the inner wall of the mounting cavity, and then recoil force is formed, and water flow normally enters the first water outlet pipe or the second water outlet pipe.

In the shunt valve, the water outlet is defined as a length direction along the circumferential direction of the valve core, and the water outlet is defined as a width direction along the axial direction of the valve core; the initial width of one end of the water outlet close to the second water outlet pipe is larger than that of one end of the water outlet close to the first water outlet pipe. The water diversion valve needs the second water outlet pipe to have larger water flow, when the traditional ball valve is provided with a water passing hole, the water passing hole is usually a circular hole or an elliptical hole, two ends of the water passing hole are in an arc shape or a tip shape, when the ball valve rotates, the effective water passing caliber of the water passing hole is gradually increased, and when the water passing flow does not reach a preset value, the part of water flow does not have or has little effect; through setting up the delivery port of special shape among this technical scheme for the initial width that the delivery port is close to second outlet pipe one end is enough big, makes the case rotate when switching over to the second outlet pipe, opens great effective water bore in the twinkling of an eye, has improved the smooth and easy nature and the high efficiency of shunt valve water flow circulation greatly, reduces the waste of water resource. Preferably, the side surface of the water outlet close to one end of the second water outlet pipe is a plane, and the width of the plane is equal to or slightly smaller than the maximum width of the water outlet, so that the maximum water flow can be generated instantly when the water outlet is butted with the water inlet port of the second water outlet pipe.

In the shunt valve, the valve body is fixedly connected with a connecting flange plate, the driving piece is a driving motor, the driving motor is fixedly arranged on the connecting flange plate, the upper end part of the valve core is provided with a valve rod, and an output shaft of the driving motor is connected with the valve rod. Further, the outer end tip of valve rod has the joint groove, driving motor's output shaft outer end is pegged graft at the joint inslot, and driving motor's output shaft outer end and the shape in joint groove all are the cuboid, the assembly of being convenient for like this, and driving motor's output shaft can form spacingly with the joint groove in addition to drive the case and just reverse the rotation.

Alternatively, the drive member may be replaced by a rotary hydraulic cylinder or the like.

In the shunt valve, the middle part of the connecting flange plate is provided with an installation through hole, the valve rod is inserted into the installation through hole, the inner wall of the installation through hole is provided with an installation step, the outer peripheral surface of the valve rod is provided with a support step corresponding to the installation step, and a third sealing ring is embedded between the installation step and the support step. Preferably, the sealing ring III is a herringbone sealing ring, one side of the fork of the herringbone sealing ring abuts against the abutting step, and the other side of the fork of the herringbone sealing ring abuts against the mounting step. And a third sealing ring is used for forming dynamic sealing between the valve rod and the connecting flange plate to prevent water flow from overflowing.

In the shunt valve, the inner side of the connecting flange plate is provided with a barrel body along the axial direction of the connecting flange plate, the barrel body extends into the installation cavity of the valve body, the outer peripheral surface of the barrel body is provided with a third annular groove along the circumferential direction of the barrel body, and a fourth sealing ring is embedded in the third annular groove and abuts against and contacts with the inner wall of the installation cavity. The connecting flange plate is fixed at the end part of the upper side of the valve body through bolts, and a sealing ring IV is arranged, so that static sealing is formed between the connecting flange plate and the inner wall of the mounting cavity, and water flow overflow is prevented.

In the shunt valve, the bottom edge of the installation cavity of the valve body is provided with an annular boss, and one side of the annular boss is provided with a notch; the annular bulge is positioned in the annular boss; and the outer side of the annular bulge to the outer peripheral surface of the valve core is provided with an extension lug, the extension lug is movably arranged in the gap, and two sides of the extension lug can respectively abut against and contact with two side walls of the gap.

In the shunt valve, the two ends of the valve core are respectively provided with a concave cavity, and reinforcing rib plates connected with the two side walls of the concave cavity are arranged in the concave cavity. The valve core is light in weight by arranging the concave cavity, and the strength of the valve core is ensured by arranging the reinforcing rib plate.

A water closet is characterized by comprising the water diversion valve.

Compared with the prior art, the shunt valve has the following advantages:

1. compared with the existing ball valve structure, the valve core and the inner wall contact surface of the installation cavity are changed into line contact or point contact from surface contact, so that the friction area between the valve core and the installation cavity is greatly reduced, the friction force is reduced, and the abrasion phenomenon is reduced.

2. The water diversion valve has the advantages of simple structure, low cost, smooth waterway conversion in the use process and basically no noise.

3. According to the invention, the initial width of the water outlet close to one end of the second water outlet pipe is large enough by arranging the water outlet with a special shape, so that when the valve core rotates and is switched to the second water outlet pipe, a large effective water passing aperture is opened instantly, the smoothness and the high efficiency of water flow circulation of the water diversion valve are greatly improved, and the waste of water resources is reduced.

Drawings

Fig. 1 is a schematic perspective view of the water dividing valve.

Fig. 2 is an exploded structure schematic diagram of the water dividing valve.

Fig. 3 is a schematic sectional structure diagram of the water dividing valve.

Fig. 4 is a schematic perspective view of the valve body of the water dividing valve.

Fig. 5 is a schematic perspective view of a valve element in the water dividing valve.

Fig. 6 is a schematic perspective view of a valve element in the water dividing valve.

In the figure, 1, a valve body; 11. a mounting cavity; 12. an annular boss; 12a, a notch; 2. a water inlet pipe; 3. a first water outlet pipe; 4. a second water outlet pipe; 5. a valve core; 51. a water passage; 51a, a water inlet; 51b, a water outlet; 52. an annular projection; 53. a first annular groove; 54. a second annular groove; 55. a convex rib; 56. a valve stem; 56a, an abutment step; 57. an extension bump; 58. a concave cavity; 59. reinforcing rib plates; 6. a drive member; 7. a first sealing ring; 8. a second sealing ring; 9. connecting a flange plate; 91. mounting a through hole; 92. mounting a step; 93. a barrel; 93a and a third annular groove; 10. a third sealing ring; 1a and a sealing ring IV.

Detailed Description

The following is a specific embodiment of the present invention and is further described with reference to the accompanying drawings, but the present invention is not limited to the following embodiment.

As shown in fig. 1 to 6, the water diversion valve comprises a valve body 1, a cylindrical installation cavity 11 is formed in the valve body 1, a water inlet pipe 2, a first water outlet pipe 3 and a second water outlet pipe 4 are respectively connected to the outer side surface of the valve body 1, and the water inlet pipe 2, the first water outlet pipe 3 and the second water outlet pipe 4 are all communicated with the installation cavity 11; a cylindrical valve core 5 is arranged in the mounting cavity 11, and a water passing channel 51 penetrating through two sides of the valve core 5 is formed in the valve core 5; the water passing channel 51 can communicate the water inlet pipe 2 with the first water outlet pipe 3, or communicate the water inlet pipe 2 with the second water outlet pipe 4, the bottom of the valve core 5 has an annular bulge 52 or a plurality of spherical bulges contacting with the bottom of the installation cavity 11; the valve body 1 is also fixedly provided with a driving piece 6 which can drive the valve core 5 to rotate. Specifically, one end of the water passage 51 is a water inlet 51a, the other end is a water outlet 51b, the water inlet 51a and the water outlet 51b are respectively located on the outer peripheral surfaces of two sides of the valve core 5, and the aperture of the water inlet 51a is larger than that of the water outlet 51 b; the water inlet pipe 2 is positioned at one side of the valve body 1, and the first water outlet pipe 3 and the second water outlet pipe 4 are arranged at the other side of the valve body 1 at intervals; defining the water outlet 51b as the length direction along the circumferential direction of the valve core 5, and defining the water outlet 51b as the width direction along the axial direction of the valve core 5; the initial width of the water outlet 51b near the end of the second water outlet pipe 4 is larger than the initial width of the water outlet 51b near the end of the first water outlet pipe 3. Preferably, the side surface of the water outlet 51b near one end of the second water outlet pipe 4 is a plane, and the width of the plane is equal to or slightly smaller than the maximum width of the water outlet 51b, so that the maximum water flow can be generated instantaneously when the water outlet 51b is butted with the water inlet port of the second water outlet pipe 4.

As shown in fig. 4 and fig. 6, preferably, the bottom of the valve core 5 in this embodiment has an annular protrusion 52 contacting with the bottom of the mounting cavity 11, the bottom edge of the mounting cavity 11 of the valve body 1 has an annular boss 12, and one side of the annular boss 12 has a notch 12 a; the annular projection 52 is located within the annular boss 12; the extension lug 57 is arranged from the outer side of the annular protrusion 52 to the outer peripheral surface of the valve core 5, the extension lug 57 is movably arranged in the notch 12a, and two sides of the extension lug 57 can respectively abut against and contact with two side walls of the notch 12 a.

The shunt valve in this embodiment is used in a dual-waterway flush toilet, the water inlet pipe 2 is communicated with a main waterway of the toilet, the first water outlet pipe 3 is communicated with a side flush pipe of the toilet, the part of water flows finally flows out from a side ring surface of the upper part of the ceramic, namely, the side flush is performed to clean the upper surface of the ceramic, the second water outlet pipe 4 is communicated with a siphon pipe of the toilet, and the part of water flows is sprayed out from the bottom of the ceramic to form siphon, so that dirt is flushed away by utilizing the siphon principle. When the valve core 5 is used, the valve core 5 has two gears, the water passing channel 51 can be selectively communicated with the water inlet pipe 2 and the first water outlet pipe 3 and communicated with the water inlet pipe 2 and the second water outlet pipe 4, in an initial state, the position of the valve core 5 enables the water passing channel 51 to be communicated with the water inlet pipe 2 and the first water outlet pipe 3, at the moment, when a main valve of the water inlet pipe 2 is opened, water flows into the water passing channel 51 from the water inlet pipe 2, then water flows out from the first water outlet pipe 3, and side punching; then the driving piece 6 drives the valve core 5 to rotate for a certain angle, so that the water passing channel 51 on the valve core 5 is communicated with the water inlet pipe 2 and the second water outlet pipe 4, and water flows out of the second water outlet pipe 4 to realize siphoning; and finally, the driving piece 6 drives the valve core 5 to reversely rotate, reset and perform lateral flushing again, and then the main water valve is closed. In this embodiment, the valve core 5 is of a cylindrical structure, the bottom of the valve core 5 is in contact with the valve body 1 through the annular protrusion 52 or the spherical protrusion, and compared with the existing ball valve structure, the contact surface between the valve core 5 and the inner wall of the installation cavity 11 is changed into line contact or point contact from surface contact, so that the friction area between the valve core 5 and the installation cavity 11 is greatly reduced, the friction force is reduced, and the abrasion phenomenon is reduced. The water dividing valve is simple in structure, low in cost, smooth in waterway conversion in the using process and basically free of noise.

As shown in fig. 2 and 3, the outer peripheral surface of the valve core 5 is respectively provided with a first annular groove 53 and a second annular groove 54 along the circumferential direction, the first annular groove 53 and the second annular groove 54 are arranged at intervals, the water passing channel 51 is positioned between the first annular groove 53 and the second annular groove 54, a first sealing ring 7 is embedded in the first annular groove 53, and a second sealing ring 8 is embedded in the second annular groove 54. The first sealing ring 7 and the second sealing ring 8 are preferably star-shaped sealing rings, the first sealing ring 7 and the second sealing ring 8 form dynamic sealing between the outer peripheral surface of the valve core 5 and the inner wall of the mounting cavity 11, when the valve core 5 rotates or is static, water flowing through the water channel 51 can be effectively prevented from flowing out from the outer peripheral surface of the valve core 5 and the inner wall of the mounting cavity 11, accordingly, the overflow phenomenon is reduced, meanwhile, the requirement on the assembly precision between the valve core 5 and the valve body 1 is lowered, a large gap can be formed between the outer peripheral surface of the valve core 5 and the inner wall of the mounting cavity 11, and therefore friction and abrasion between the outer peripheral surface of the. A gap is reserved between the outer peripheral surface of the valve core 5 and the inner wall of the installation cavity 11, a plurality of convex ribs 55 along the axial direction of the valve core 5 are arranged on the outer peripheral surface of the valve core 5, the convex ribs 55 are distributed at intervals along the circumferential direction of the valve core 5, and the convex ribs 55 are located between the first annular groove 53 and the second annular groove 54. Therefore, a larger gap can be formed between the outer peripheral surface of the valve core 5 and the inner wall of the mounting cavity 11, a proper gap is formed between the outer surface of the convex rib 55 and the inner wall of the mounting cavity 11 by controlling the size of the convex rib 55, the precision is easy to control relative to the whole cylindrical surface, the processing difficulty is small, and a smaller overflowing gap is formed between the valve core 5 and the valve body 1 while the normal rotation of the valve core 5 is ensured; the water leakage phenomenon formed by the water flow flowing along the circumferential direction between the outer circumferential surface of the valve core 5 and the inner wall of the mounting cavity 11 is effectively reduced. Moreover, the surface contact between the outer peripheral surface of the valve core 5 and the inner wall of the mounting cavity 11 is changed into line contact, so that even if assembly errors exist, the contact area between the valve core 5 and the valve body 1 can be ensured to be reduced, and further the friction and the abrasion are reduced.

As shown in fig. 1 and 2, the flange plate 9 has been linked firmly on the valve body 1, driving piece 6 sets firmly on flange plate 9 for driving motor and driving motor in this embodiment, the upper end tip of case 5 has valve rod 56, the outer end tip of valve rod 56 has the joint groove, driving motor's output shaft outer end is pegged graft at the joint inslot, driving motor's output shaft outer end and the shape in joint groove all are the cuboid, the assembly of being convenient for like this, and driving motor's output shaft can form spacingly with the joint groove, thereby drive case 5 just reverse rotation. Further, as shown in fig. 3, the connecting flange 9 has a mounting through hole 91 in the middle, the valve stem 56 is inserted into the mounting through hole 91, a mounting step 92 is provided on the inner wall of the mounting through hole 91, an abutting step 56a corresponding to the mounting step 92 is provided on the outer circumferential surface of the valve stem 56, and a third sealing ring 10 is embedded between the mounting step 92 and the abutting step 56 a. Preferably, the third seal ring 10 is a chevron seal ring, with one side of the chevron seal ring bifurcation abutting against the abutment step 56a and the other side abutting against the mounting step 92. The third sealing ring 10 forms dynamic sealing between the valve rod 56 and the connecting flange 9 to prevent water flow from overflowing; the inboard of connecting flange dish 9 has along its axial barrel 93, barrel 93 stretches into in the installation cavity 11 of valve body 1, set up three 93a of annular groove along its circumference on the outer peripheral face of barrel 93, the embedded sealing washer four 1a that is equipped with of annular groove three 93a and four 1a of sealing washer lean on the contact with the inner wall counterbalance of installation cavity 11, connecting flange dish 9 passes through the bolt fastening at the upside tip of valve body 1, through setting up four 1a of sealing washer, make like this and form static seal between the inner wall of connecting flange dish 9 and installation cavity 11, prevent that rivers from overflowing.

As shown in fig. 5 and 6, in the present embodiment, preferably, both ends of the valve element 5 are provided with the concave cavities 58, reinforcing ribs 59 connecting both side walls of the concave cavities 58 are provided in the concave cavities 58, the weight of the valve element 5 is reduced by providing the concave cavities 58, and the strength of the valve element 5 is ensured by providing the reinforcing ribs 59.

The embodiment further comprises a flush toilet, which comprises the above-mentioned shunt valve.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.