CN214093174U - One-way valve - Google Patents

Abstract

The utility model discloses a check valve, including valve body and case, the valve body is formed with the valve port, at the lower fluid passage between downward flow increase case and the valve body inner wall of valve port to be favorable to reducing the flow resistance.

Description

One-way valve

Technical Field

The utility model relates to a fluid control technical field, concretely relates to check valve.

Background

When the air conditioning system operates, refrigerant flows in the air conditioning system, the flow resistance of fluid in the air conditioning system is an important factor influencing the performance of the air conditioning system, and the check valve is one of parts forming the air conditioning system, so that the check valve is required to be designed to reduce the flow resistance.

SUMMERY OF THE UTILITY MODEL

It is an object of the present application to provide a one-way valve to facilitate reducing flow resistance.

One embodiment of the technical scheme of the utility model provides a one-way valve, including valve body, case subassembly and support piece, the case subassembly includes case and valve rod, the support piece has with the hole of valve rod sliding fit, the valve body has the perforating hole, the case subassembly with the support piece is located the perforating hole, the support piece with the valve body spacing connection; the valve body is provided with a valve port, a first interface and a second interface, and the first interface and the second interface are ports formed on the surface of the valve body by the through hole; the valve body comprises a first wall, a second wall and a guide wall, the first wall and the second wall face the through hole, the area surrounded by the first wall comprises the valve port, and the inner diameter of the first wall increases along the direction from the first port to the second port; in an axial direction of the through hole, the second wall is located between the valve port and the guide wall, and the first wall is closer to the first port than the second wall; the valve core is matched with the first wall to close the valve port, and the second wall is far away from the axis of the through hole than the first wall and the guide wall;

when the valve core opens the valve port, the valve core is positioned in the area surrounded by the second wall.

The one-way valve provided by the above embodiment of the application comprises a valve body, wherein the valve body comprises a guide wall, a first wall and a second wall, the second wall is positioned between the first wall and the guide wall, and the second wall is far away from the axis of the through hole compared with the first wall and the guide wall, so that the fluid passage between the valve core and the inner wall of the valve body is relatively increased, and the flow resistance is favorably reduced.

Drawings

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

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

FIG. 3 is a perspective view of one embodiment of the support member of FIG. 2;

FIG. 4 is a schematic diagram of an exploded structure of the check valve shown in FIG. 1;

FIG. 5 is a first cross-sectional structural view of the valve body of FIG. 4;

FIG. 6 is a perspective view of the valve core assembly;

FIG. 7 is a front structural schematic view of the valve core assembly of FIG. 6;

FIG. 8 is a first cross-sectional structural view of the valve body of FIG. 4;

fig. 9 is a first cross-sectional structural view of the valve body of fig. 4.

Detailed Description

Referring to fig. 1-7, the check valve includes a valve body 100, a valve core assembly 300 and a support member 200, the valve body 100 has a through hole 190, the valve core assembly 300 and the support member 200 are located in the through hole 190, and the valve core assembly 300 can move along an axis of the through hole in the through hole 190 to open and close a valve port 111 of the check valve. In the present embodiment, the through-hole 190 is centrosymmetric along the axis of the through-hole. In other embodiments, the check valve may further include an elastic element, one end of which abuts against the support 200, and the other end of which abuts against the valve core assembly 300, the elastic element being capable of providing energy for the resetting of the valve core assembly 300, and the elastic element may be a spring, or other elastic structure, which will not be described in detail.

The check valve has a first port 101 and a second port 102, both the first port 101 and the second port 102 are formed in the outer wall of the valve body 100, the first port 101 is a port formed in the outer wall of the valve body by the through hole 190, and the second port 102 is a port formed in the outer wall of the valve body by the through hole 190. The through hole 190 includes a first connection cavity 103 and a second connection cavity 104, wherein the first connection cavity 103 is communicated with the first port 101, the second connection cavity 104 is communicated with the second port 102, the first connection cavity 103 and the second connection cavity 104 are used for accommodating connection pipes or other fittings, a part of the connection pipes are located in the connection cavities and are fixed to the valve body in a sealing manner, and the valve core assembly 300 and the support member 200 are located between the first connection cavity 103 and the second connection cavity 104.

The cartridge assembly 300 includes a cartridge including a cartridge head 301 and a seal 390, the cartridge head and the valve rod are integrally formed, the cartridge head 301 includes a cavity 330, and at least a portion of the seal 390 is located in the cavity 330 of the cartridge head 301. Specifically, the valve core head 301 includes a first sub-portion 350 and a second sub-portion 360, the first sub-portion 350 is closer to the first port 101 than the second sub-portion 360, a part of a wall of the first sub-portion 350 faces the cavity 330, a part of a wall of the second sub-portion 360 faces the cavity 330, an outer diameter of the first sub-portion 350 is smaller than an outer diameter of the second sub-portion 360, and a radial dimension 351 of an outer diameter surface of the first sub-portion 350 increases from the first port 101 to the second port 102 or in a fluid flow direction, so as to facilitate reducing fluid resistance.

Referring to fig. 2 and 5, the valve body 100 includes a first wall 110, the first wall 110 is located between the first connection chamber 103 and the second connection chamber 104, the first wall 110 is adjacent to the first connection chamber 103 compared with the second connection chamber 104, and a part or all of the area surrounded by the first wall 110 includes a valve port. When the valve cartridge assembly 300 closes the check valve, the seal 390 abuts the first wall 110 and the fluid passage of the check valve is closed. Specifically, when the pressure of the second port 102 is greater than the pressure of the first port 101, under the action of the pressure, the valve core assembly 300 abuts against the first wall 110, so that the sealing member 390 is attached to the first wall 110, and the first port 101 is not communicated with the second port 102. When the pressure of the first port 101 is higher than that of the second port 102 during operation of the check valve, the valve core assembly is separated from the first wall 110 under the action of the pressure, and the sealing member 390 is separated from the first wall 110, so that the first port 101 is communicated with the second port 102. For convenience of description, a first direction from the first interface 101 to the second interface 102 is defined, and the first direction may also be defined as follows: the first direction is the flow direction of the fluid when the check valve operates, in this embodiment, the first port 101 is an inlet of the check valve, and the second port 102 is an outlet of the check valve, as illustrated in fig. 2.

In the present embodiment, the first wall is inclined with respect to the axis of the through hole, and the inner diameter of the first wall 110 increases in the first direction. The valve body further includes a second wall 120 and a guide wall 140, the second wall 120 is located between the first wall 110 and the guide wall 140 in the first direction, the second wall 120 has an inner diameter larger than that of the first wall 110, or, in a radial direction of the through-hole 190, the first wall 110 is closer to an axis of the through-hole 190 than the second wall 120; the inner diameter of the second wall 120 is larger than the inner diameter of the guide wall 140, or, in the radial direction of the through hole 190, the guide wall 140 is closer to the axis of the through hole 190 than the second wall 120, and the inner diameter of the second wall 120 is larger than the inner diameter of the first wall 110 and the inner diameter of the guide wall 140, when the valve core assembly opens the valve port 111, the valve core assembly 300 moves towards the second port 102, and the valve core is located in the area surrounded by the second wall 120, so that the flow area of the fluid is increased, and the flow resistance is favorably reduced. More specifically, the second wall 120 includes a first connection wall 121, a second connection wall 122, and a third connection wall 123, wherein the first connection wall 121 is located between the first wall 110 and the third connection wall 123, and the second connection wall 122 is located between the third connection wall 123 and the guide wall 140. In the present embodiment, the first connection wall 122 connects the first wall 110 and the third connection wall 123, and the second connection wall 122 connects the third wall 123 and the guide wall 140. The first connecting wall 121 extends from the valve port toward the guide wall 140, and the inner diameter of the first connecting wall 121 increases from the first port 101 to the second port 102. The second connecting wall 122 extends from the guide wall 140 toward the first wall 110, the second connecting wall 122 has an inner diameter larger than that of the guide wall 140, and the inner diameter of the second connecting wall 122 decreases from the first port 101 to the second port 102. The first and second connection walls 121 and 122 are disposed obliquely to facilitate fluid flow. Of course, the first connecting wall 121 and the second connecting wall 122 may be perpendicular to the axis of the through hole 190, as shown in fig. 9, in which the second connecting wall is perpendicular to the axis of the through hole. In this embodiment, the third connecting wall 123 is parallel to the axis of the through hole to facilitate the fluid flow, and in other embodiments, the third connecting wall may not be provided, please refer to fig. 8 and 9.

Referring to fig. 2, 6 and 7, the valve core assembly 300 further includes a connecting portion 340 and at least two guiding ribs 310, the connecting portion 340 is located between the valve core and the valve stem 320, the connecting portion 340 has a receiving hole, an opening of the receiving hole faces the support member 200, a portion of the valve stem 320 is located in the receiving hole and fixed with the connecting portion 340, when the check valve includes an elastic element, one end of the elastic element is also located in the receiving hole and abuts against the connecting portion 340, and the connecting portion 340 has a receiving hole, which facilitates the position limitation of the elastic element. The guide ribs 310 extend from the outer wall of the connecting portion 340 to the radial direction of the through hole 190, a fluid channel is formed in the area between the adjacent guide ribs 310, the first end of each guide rib 310 extends to the second sub portion 360 of the valve core, the guide ribs 310 are closer to the support 200 than the second sub portion 360, the second end of each guide rib 310 is closer to the support 200 than the first end, and after fluid passes through the valve port, the guide ribs 310 are directly contacted with the second sub portion 360 without being separated, so that the resistance of the guide ribs 310 to the fluid is reduced. The guide rib 310 is slidably engaged with the guide wall 140, and the valve core assembly 300 moves in the axial direction of the through hole 190, thereby preventing the valve core from being eccentric. More specifically, the outer diameter surface of the guide rib 310 includes a first sub-surface 311 and a second sub-surface 312, the first sub-surface 311 extends from the outer diameter surface of the second sub-portion 360 to the second sub-surface 312, along the first direction, the outer diameter of the first sub-surface 311 increases, the second sub-surface 312 contacts with the guide wall 140, the second sub-surface 312 and the first sub-surface 311 are approximately arc end surfaces, and a gap between the arc end surfaces and the guide wall is 0.1mm to 0.6mm, which can prevent an excessive opening pressure of the check valve caused by an excessive friction pressure between the guide rib 310 and the guide wall when the valve core assembly 300 moves, and can also enable the guide of the guide rib 310 to have greater stability.

The through hole 190 further includes a receiving cavity 105, and the receiving cavity 105 is located between the guide wall 140 and the second connection cavity 104 in the axial direction of the through hole, and the receiving cavity 105 is adjacent to the second connection cavity 104. The support member 200 is located in the receiving cavity 105 and fixed to the inner wall of the valve body by a clamping or screwing method, and in this embodiment, the support member 200 is clamped to the valve body 100. Specifically, referring to fig. 3 and 2, the supporting member 200 includes a main body portion 210 and at least two cantilever portions 220, the main body portion 210 and the cantilever portions 220 are an integral structure, the main body portion 210 and the cantilever portions 220 may be formed by injection molding or by stamping a metal member, the main body portion 210 is annular, and the main body portion 210 may or may not contact with an inner wall of the valve body. The cantilever portions 220 extend from the main body portion 210 toward the valve element, and along the circumferential direction of the supporting member 200, a gap 202 is formed between adjacent cantilever portions 220, or adjacent walls of adjacent cantilever portions 220 are not in contact, so that the cantilever portions 220 have certain elasticity, and the supporting member 200 is convenient to mount. The supporting member further includes a fitting portion 221, the valve body includes a limiting portion 170, and the fitting portion 221 and the limiting portion 170 are clamped and fitted to each other to fix the supporting member 200. In the present embodiment, the engaging portion 221 is formed on the cantilever wall portion 220, the stopper portion 170 is formed on the valve body, the cantilever portion 220 further includes a base 222, the outer diameter of the base 222 is substantially equal to the outer diameter of the body portion 210, and the engaging portion 221 protrudes from the base 222 toward the wall of the through hole 190; the stopper 170 is recessed with respect to the guide wall. Spacing portion 170 is the concave part of a plurality of discrete distributions in the valve body, and cooperation portion and spacing portion cooperation are favorable to preventing support piece 200 rotatory like this, improve the stability of check valve. In other embodiments, the position-limiting part 170 is a protrusion protruding relative to the inner wall of the other part of the valve, the matching part forms a recess in the base body, each base body forms at least one recess, and the position-limiting part 170 and the matching part 221 are matched with each other to fix or position the supporting member 200.

Referring to fig. 3, the supporting member 200 includes a stem hole 231 and a supporting portion 232, the stem hole 231 is substantially located at the center of the main body 210, the supporting portion 232 extends from the outer wall of the stem hole to the inner wall of the main body 210 along the radial direction of the main body 210, a fluid passage 201 is formed in a space between adjacent supporting portions 232, and the supporting portion 232 has functions of fixing the stem hole 231 and supporting the main body 210. The valve stem 320 can slide in the valve stem hole, the valve stem 320 is in clearance fit or sliding fit with the valve stem hole 231, and the valve stem hole 231 has a guiding function on the valve stem 320 to prevent the valve core assembly 300 from being eccentric during action and reduce the performance of the one-way valve. Further, the inner wall of the valve stem hole 231 is shaped in a special way or the inner wall of the valve stem hole 231 is a non-rotating body, and the shape of the valve stem 320 is matched with the shape of the guide hole of the valve stem hole 231, so that the valve core assembly 300 is prevented from rotating, and the noise of the check valve is reduced. In the present embodiment, the cantilever portion 220 is closer to the valve body 301 than the body portion 210, but of course, the body portion 210 may be closer to the valve body 301 than the cantilever wall portion 220. The inner diameter of the supporter 200 is greater than or equal to the inner diameter of the guide wall 140, which can reduce the fluid resistance of the supporter 200.

The first plane is arranged and perpendicular to the axis of the through hole 190, and the projection of the guide rib 310 on the first surface is located in the projection of the first surface of the support part, so that the support part cannot be located in a flow channel between adjacent guide ribs 310, and the flow resistance is favorably reduced. In a specific embodiment, there are three guiding ribs 310 and three supporting portions of the supporting member 200, and the projection of the guiding ribs 310 coincides with the projection of the supporting portions along the first direction, which is beneficial to reduce the flow resistance of the fluid.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications thereof without departing from the spirit and scope of the present invention can be modified or replaced by other technical solutions and modifications by those skilled in the art.

Claims (12)

1. A check valve comprises a valve body, a valve core assembly and a support piece, wherein the valve core assembly comprises a valve core and a valve rod, the support piece is provided with a hole matched with the valve rod in a sliding mode, the valve body is provided with a through hole, the valve core assembly and the support piece are located in the through hole, and the support piece is connected with the valve body in a limiting mode; the valve body is provided with a valve port, a first interface and a second interface, and the first interface and the second interface are ports formed on the surface of the valve body by the through hole; the valve body comprises a first wall, a second wall and a guide wall, the first wall and the second wall face the through hole, the area surrounded by the first wall comprises the valve port, and the inner diameter of the first wall increases along the direction from the first port to the second port; in an axial direction of the through hole, the second wall is located between the valve port and the guide wall, and the first wall is closer to the first port than the second wall; the valve core is matched with the first wall to close the valve port, and the second wall is far away from the axis of the through hole than the first wall and the guide wall;

when the valve core opens the valve port, the valve core is positioned in the area surrounded by the second wall.

2. The check valve of claim 1, wherein the first wall is disposed obliquely with respect to an axis of the through hole, the second wall includes a first connecting wall connected to the first wall, the first connecting wall extends from the valve port toward the guide wall, and an inner diameter of the first connecting wall increases in a direction from the first port to the second port.

3. The check valve of claim 1, wherein the valve body includes a second connecting wall connected to the guide wall, the second connecting wall extending from the guide wall toward the first wall, the second connecting wall having an inner diameter greater than an inner diameter of the guide wall, the second connecting wall decreasing in inner diameter in a direction from the first port to the second port.

4. The check valve of claim 2, wherein the valve body includes a second connecting wall connected to the guide wall, the second connecting wall extending from the guide wall toward the first wall, the second connecting wall having an inner diameter greater than an inner diameter of the guide wall, the second connecting wall decreasing in inner diameter in a direction from the first port to the second port.

5. The check valve of claim 4, wherein the second wall includes a third connecting wall connected to the first connecting wall, the third connecting wall being connected to the second connecting wall, and an axis of the through hole is parallel to the third connecting wall.

6. The one-way valve of any one of claims 1-5, wherein the spool assembly includes a seal, the spool having a recess that receives the seal;

the valve core comprises a first sub-portion and a second sub-portion, the first sub-portion is closer to a first interface than the second sub-portion, a part of the wall of the first sub-portion faces the concave portion, a part of the wall of the second sub-portion faces the concave portion, the outer diameter of the first sub-portion is smaller than that of the second sub-portion, and the outer diameter surface of the first sub-portion increases from the first interface to the second interface.

7. The check valve of claim 6, wherein the valve core assembly includes at least two guide ribs, a fluid channel is formed between adjacent guide ribs, the guide ribs are closer to the support member than the second sub-portion, an outer diameter surface of the guide ribs includes a first sub-surface and a second sub-surface, the first sub-surface extends from an outer diameter surface of the second sub-surface to the second sub-surface from a first interface direction to a second interface direction, an outer diameter of the first sub-surface increases, and the second sub-surface is in sliding fit with the guide wall.

8. The check valve of claim 6, wherein the support member includes a main body portion, a stem hole portion, and a support portion, the main body portion, the stem hole portion, and the support portion being of an integral structure, one end of the support portion being fixed to an outer wall of the stem hole portion, the other end of the support portion being fixed to an inner wall of the main body portion; the valve rod hole part comprises a valve rod hole, and the valve rod is positioned in the valve rod hole and is in sliding fit with the valve rod hole part;

and a channel for fluid to pass through is arranged between the adjacent supporting parts, the number of the supporting parts is consistent with that of the guide ribs of the valve core assembly, a first plane is defined, the first plane is vertical to the axis of the through hole, and the projection of the guide ribs on the first plane is positioned in the projection of the first plane of the supporting parts.

9. The check valve of claim 7, wherein the support member includes a main body portion, a stem hole portion, and a support portion, the main body portion, the stem hole portion, and the support portion being of an integral structure, one end of the support portion being fixed to an outer wall of the stem hole portion, the other end of the support portion being fixed to an inner wall of the main body portion; the valve rod hole part comprises a valve rod hole, and the valve rod is positioned in the valve rod hole and is in sliding fit with the valve rod hole part;

and a channel for fluid to pass through is arranged between the adjacent supporting parts, the number of the supporting parts is consistent with that of the guide ribs of the valve core assembly, a first plane is defined, the first plane is vertical to the axis of the through hole, and the projection of the guide ribs on the first plane is positioned in the projection of the first plane of the supporting parts.

10. The check valve of claim 8 or 9, wherein the support member further comprises at least two cantilever portions, the main body portion and the cantilever portions are of an integral structure, and a gap is formed between adjacent cantilever portions along the circumferential direction of the main body portion; the cantilever part comprises a limiting part, the valve body comprises a matching part, the matching part is closer to the second interface than the guide rib, and the limiting part is matched with the matching part to fix the supporting piece.

11. The check valve of claim 10, wherein the cantilever portion includes a base and the limiting portion, the limiting portion protrudes from the base away from an axis of the through hole, the mating portion is formed as a concave portion, the concave portion is discretely distributed on the valve body, and an inner diameter of the guide rib is smaller than or equal to an inner wall of the cantilever portion.

12. The check valve of claim 1, wherein the area surrounded by the first wall includes the valve port, the valve body includes a first connecting wall connecting the first wall and the third connecting wall, a second connecting wall connecting the third connecting wall and the guide wall, a third connecting wall extending from the valve port toward the third connecting wall, and a guide wall between the second connecting wall and the support, an inner diameter of a junction of the first connecting wall and the first wall being equal to an inner diameter of the guide wall; in the direction from the first port to the second port, the inner diameter of the first connecting wall is reduced, and the inner diameter of the second connecting wall is increased;

the valve core assembly comprises a sealing element, the valve core is provided with a cavity for accommodating the sealing element, the valve core comprises a first sub-part and a second sub-part, the first sub-part is closer to a first interface than the second sub-part, a part of the wall of the first sub-part faces the cavity, a part of the wall of the second sub-part faces the cavity, the outer diameter of the first sub-part is smaller than that of the second sub-part, and the outer diameter surface of the first sub-part is increased from the first interface to the second interface;

the valve core assembly comprises at least three guide ribs, the guide ribs are closer to the support piece than the second sub-portion, the outer diameter surface of each guide rib comprises a first sub-surface and a second sub-surface, the first sub-surface extends from the outer diameter surface of the second sub-portion to the second sub-surface, the outer diameter of the first sub-surface is increased, and the second sub-surface is in contact with the guide wall;

the support piece comprises at least two cantilever parts, a main body part, a valve rod hole part and at least three support parts, wherein the main body part, the cantilever parts, the valve rod hole part and the support parts are of an integrated structure, one end of each support part is fixed with the outer wall of the valve rod hole part, and the other end of each support part is fixed with the inner wall of the main body part; the valve rod hole part comprises a valve rod hole, and the valve rod is positioned in the valve rod hole and is in sliding fit with the valve rod hole part; a channel for fluid to pass through is arranged between the adjacent supporting parts, the number of the supporting parts is consistent with that of the guide ribs, a first plane is defined, the first plane is vertical to the axis of the through hole, and the projection of the guide ribs on the first plane is positioned in the projection of the first plane of the supporting parts; a gap is reserved between the adjacent cantilever parts along the circumferential direction of the main body part, each cantilever part comprises a matching part, a limiting part is formed by the wall of the corresponding through hole, and the limiting parts are matched with the matching parts to fix the supporting piece;

the cantilever part comprises a base body and the matching part, the matching part protrudes backwards from the axis of the base body relative to the through hole, the limiting part is formed into a concave part, the concave part is distributed on the inner wall of the valve body in a scattered manner, and the inner diameter of the guide rib is smaller than or equal to that of the inner wall of the cantilever part;

the check valve further comprises an elastic element, one end of the elastic element is abutted against the valve core assembly, and the other end of the elastic element is abutted against the support piece.

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