One-way valve

Abstract

The utility model provides a one-way valve which comprises a valve seat provided with a center channel penetrating through the valve seat, and a step part coaxial with the center channel is arranged at one end of the valve seat; the valve sleeve coaxially sleeves the step part of the valve seat, is fixedly connected with the valve seat and is provided with a cavity communicated with the central channel of the valve seat; the valve element is movably connected in a cavity formed by the valve sleeve and the interior of the valve seat, and a sliding positioning assembly enabling the valve element and the valve sleeve to be kept coaxial is arranged between the valve element and the valve sleeve. According to the utility model, the design structure is reasonable, and the valve sleeve is directly and coaxially connected to the end part of the valve seat close to the valve port, so that the valve port and the valve sleeve have better concentricity, and then the more accurate concentricity requirement between the valve core and the valve port is finally realized through the positioning sliding assembly, and the problem of leakage at the positions of the valve core and the valve port is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valve design, and in particular to a check valve. Background Art

[0002] A check valve is a one-way opening and closing valve that controls the fluid medium in a pipeline to flow in only one direction and does not allow it to flow backward. For example, the Chinese invention patent with the application number CN202311800492.8 discloses a check valve and an air conditioner. The check valve includes: a valve seat having a channel therethrough and a valve port at one end; a metal valve core fixedly installed in the channel of the valve seat; the metal valve core is formed into a cup-shaped hollow structure and configured to be movable relative to the valve seat between an open valve position and a closed valve position. In the closed valve position, the outer wall of the metal valve core abuts against the side wall of the valve port to block the valve port and prevent the fluid from flowing through the check valve in the first direction. When the fluid flows in the second direction opposite to the first direction, the fluid pushes the metal valve core to the open valve position, so that the outer wall of the metal valve core does not abut against the side wall of the valve port, and the fluid can flow through the metal valve core in the second direction. This technical solution realizes the movement of the valve core by setting a positioning component inside the valve body. However, this structure still has certain defects in actual use. The main problem is that the positioning plate in this solution is arranged on the side far from the valve port, which cannot meet the requirement of high-precision concentricity between the valve core and the valve port, and there are defects such as poor concentricity between the valve port and the valve core and easy leakage. Summary of the Utility Model

[0003] The utility model provides a check valve to solve the problem of poor concentricity between the movement axis of the internal valve core and the axis of the valve port of the existing check valve as proposed in the above background art.

[0004] The technical solution of the utility model is realized as follows:

[0005] A check valve includes:

[0006] A valve seat having a central channel therethrough and a stepped portion coaxial with the central channel at one end;

[0007] A valve sleeve coaxially sleeved on the stepped portion of the valve seat and fixedly connected to the valve seat, having a cavity communicating with the central channel of the valve seat;

[0008] A valve core movably connected in the cavity formed inside the valve sleeve and the valve seat, and having a sliding positioning component between the valve core and the valve sleeve to keep the valve core and the valve sleeve coaxial.

[0009] Preferably, the sliding positioning component includes a first positioning shaft fixed at the center of the valve core and a first positioning sleeve fixed at the center of the valve sleeve, and the first positioning shaft is slidably connected in the first positioning sleeve.

[0010] Preferably, the sliding positioning assembly includes a second positioning sleeve fixed to the center of the valve core and a second positioning shaft fixed to the center of the valve sleeve, and the second positioning shaft is slidably connected within the second positioning sleeve.

[0011] Preferably, the valve core has a cup-shaped structure, including a cylindrical section near the mouth of the cup-shaped structure and a conical section connected to the cylindrical section and near the bottom of the cup. One end of the central passage of the valve seat has a valve port, and the conical section can contact or separate from the valve port to achieve the disconnection or unblocking of the internal passage of the check valve.

[0012] Preferably, a plurality of first water passing holes are provided in the circumferential position of the valve sleeve.

[0013] Preferably, a plurality of second water passing holes are provided at the tail end of the valve sleeve.

[0014] Preferably, a gap is formed between the outer wall of the valve core and the inner wall of the valve sleeve.

[0015] Preferably, it further includes a valve body, the valve body has a cylindrical structure, the valve seat, the valve core and the valve sleeve are all located inside the valve body, and the valve seat is fixedly connected inside the valve body and is coaxially arranged with the valve body.

[0016] Adopting the above technical solutions, the beneficial effects of the present utility model are as follows:

[0017] The design structure of the present utility model is reasonable. The valve sleeve is directly coaxially connected to the end of the valve seat near the valve port, so that the valve port and the valve sleeve can have better concentricity. Subsequently, through the positioning sliding assembly, a more precise concentricity requirement is finally achieved between the valve core and the valve port, avoiding the problem of leakage at the position of the valve core and the valve port. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 It is a three-dimensional view of Embodiment 1 of the present utility model;

[0020] Figure 2 It is a structural diagram of the check valve in Embodiment 1 of the present utility model when the valve is closed;

[0021] Figure 3 It is a structural diagram of the check valve in Embodiment 1 of the present utility model when the valve is opened;

[0022] Figure 4 It is a structural diagram of the valve core in Embodiment 1 of the present utility model;

[0023] Figure 5 Structural diagram of the valve sleeve in the first embodiment of the present utility model;

[0024] Figure 6 Structural diagram of the check valve when it is closed in the second embodiment of the present utility model;

[0025] Figure 7 Structural diagram of the check valve when it is opened in the second embodiment of the present utility model;

[0026] Figure 8 Structural diagram of the valve core in the second embodiment of the present utility model;

[0027] Figure 9 Structural diagram of the valve sleeve in the second embodiment of the present utility model.

[0028] Wherein:

[0029] 1. Valve seat; 101. Central channel; 102. Valve port; 103. Step portion;

[0030] 2. Valve core; 201. First positioning shaft; 202. Cylindrical section; 203. Conical section; 204. Second positioning sleeve;

[0031] 3. Valve sleeve; 301. First positioning sleeve; 302. First water passage hole; 303. Second water passage hole; 304. Second positioning shaft;

[0032] 4. Valve body;

[0033] 5. Gap. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0035] Embodiment 1

[0036] Refer to Figures 1 - 5 , a check valve, comprising:

[0037] Valve seat 1, having a central channel 101 passing through it, and one end having a step portion 103 coaxial with the central channel 101. One end of the central channel 101 of the valve seat 1 has a valve port 102. Among them, the valve port 102 and the step portion 103 at the end of the valve seat 1 are integrally formed, so they have good coaxiality.

[0038] The valve sleeve 3 is coaxially sleeved at the stepped portion 103 of the valve seat 1 and fixedly connected to the valve seat 1. It has a cavity communicating with the central channel 101 of the valve seat 1. Since the valve sleeve 3 is sleeved at the stepped portion 103 of the valve seat 1, a high concentricity can be achieved between the valve sleeve 3 and the valve port 102. In this example, the valve sleeve 3 is an overall hollow straight cylinder structure. A number of first water holes 302 are provided at the circumferential position of the valve sleeve 3, and a number of second water holes 303 are provided at the tail end of the valve sleeve 3, so that in the open valve state, the fluid can flow through the first water holes 302 and the second water holes 303;

[0039] The valve core 2 is movably connected in the cavity formed inside the valve sleeve 3 and the valve seat 1. There is a sliding positioning assembly between the valve core 2 and the valve sleeve 3 to keep the valve core 2 and the valve sleeve 3 coaxial.

[0040] In this example, the sliding positioning assembly includes a first positioning shaft 201 fixed at the center of the valve core 2 and a first positioning sleeve 301 fixed at the center of the valve sleeve 3. The first positioning shaft 201 is slidably connected in the first positioning sleeve 301. Among them, the first positioning shaft 201 can be fixed at the center of the valve core 2 by welding, and the first positioning sleeve 301 shell can be fixed at the center of the valve sleeve 3 by welding. The first positioning shaft 201 and the first positioning sleeve 301 have a clearance fit of 5 to meet the concentricity requirements between the valve core 2 and the valve port 102.

[0041] Specifically, the valve core 2 has a cup-shaped structure, including a cylindrical section 202 near the cup mouth of the cup-shaped structure and a conical section 203 connected to the cylindrical section 202 and near the cup bottom. The conical section 203 can contact or separate from the valve port 102 to realize the disconnection or smoothness of the internal channel of the one-way valve. More specifically, a clearance of 5 is formed between the outer wall of the valve core 2 and the inner wall of the valve sleeve 3; among them, the purpose of setting the conical section 203 is, firstly, to be able to contact the valve port 102 to achieve the on-off effect of the one-way valve, and secondly, because there is a clearance of 5 between the valve core 2 and the valve sleeve 3, during the valve opening process, the clearance between the conical section 203 and the valve sleeve 3 is larger, so that the fluid can quickly pass through the first water holes 302 to improve the fluid flow efficiency.

[0042] Specifically, it further includes a valve body 4. The valve body 4 has a cylindrical structure. The valve seat 1, the valve core 2, and the valve sleeve 3 are all located inside the valve body 4. The valve seat 1 is fixedly connected inside the valve body 4 and is coaxially arranged with the valve body 4.

[0043] Embodiment Two

[0044] The difference between this embodiment and the above embodiment is only that: the sliding positioning component includes a second positioning sleeve 204 fixed to the center of the valve core 2 and a second positioning shaft 304 fixed to the center of the valve sleeve 3. The second positioning shaft 304 is slidably connected within the second positioning sleeve 204. This structure can also achieve the horizontal movement of the valve core 2 relative to the valve sleeve 3 in the axial direction to achieve the positioning effect.

[0045] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A one-way valve, characterized in that: include: A valve seat (1) having a central channel (101) extending therethrough, and having a step portion (103) coaxial with the central channel (101) at one end; A valve sleeve (3) is coaxially sleeved at the step portion (103) of the valve seat (1) and fixedly connected to the valve seat (1), and has a cavity connected to the central channel (101) of the valve seat (1); The valve core (2) is movably connected in a cavity formed inside the valve sleeve (3) and the valve seat (1), and a sliding positioning component is provided between the valve core (2) and the valve sleeve (3) to keep the valve core (2) and the valve sleeve (3) coaxial.

2. A one-way valve according to claim 1, characterized in that: The sliding positioning assembly comprises a first positioning shaft (201) fixed at the center of the valve core (2) and a first positioning sleeve (301) fixed at the center of the valve sleeve (3); the first positioning shaft (201) is slidably connected in the first positioning sleeve (301).

3. A one-way valve according to claim 1, characterized in that: The sliding positioning assembly comprises a second positioning sleeve (204) fixed at the center of the valve core (2) and a second positioning shaft (304) fixed at the center of the valve sleeve (3); the second positioning shaft (304) is slidably connected in the second positioning sleeve (204).

4. A one-way valve according to claim 1, characterized in that: The valve core (2) is in the form of a cup-shaped structure, comprising a cylindrical section (202) close to the cup mouth of the cup-shaped structure, and a conical section (203) connected to the cylindrical section (202) and close to the cup bottom. One end of the central channel (101) of the valve seat (1) has a valve port (102), and the conical section (203) can contact or separate from the valve port (102) to achieve disconnection or unblocking of the internal channel of the one-way valve.

5. A one-way valve according to claim 1, characterized in that: A plurality of first water holes (302) are provided at circumferential positions of the valve sleeve (3).

6. A one-way valve according to claim 1, characterized in that: A plurality of second water holes (303) are provided at the rear end of the valve sleeve (3).

7. A one-way valve according to claim 4, characterized in that: A gap (5) is formed between the outer wall of the valve core (2) and the inner wall of the valve sleeve (3).

8. A one-way valve according to claim 1, characterized in that: It also comprises a valve body (4), which is a cylindrical structure, wherein the valve seat (1), the valve core (2) and the valve sleeve (3) are all located inside the valve body (4), and the valve seat (1) is fixedly connected inside the valve body (4) and is coaxially arranged with the valve body (4).

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