Valve

Abstract

A valve includes a valve seat having an inlet passage and an outlet passage, and a first tube having a first port in communication with the inlet passage and a second port in communication with the outlet passage. The valve comprises a valve seat and a first pipe fitting, the valve seat is provided with an inlet channel and an outlet channel, the first pipe fitting is provided with a first port and a second port, the first port is communicated with the inlet channel, the second port is communicated with the outlet channel, the manufacturing precision of the pipe fittings is high, and the first pipe fitting serves as a small-opening-degree circulation channel of the valve, so that the valve is convenient to use. And the precision of the small opening degree of the valve is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fluid control, and particularly to a valve. Background Art

[0002] In some spring and autumn seasons, due to unstable environmental conditions, scenarios of occasional refrigeration and occasional heating may occur. The purpose of the air conditioner is to maintain the temperature stability of the vehicle passenger compartment. In such working conditions, the opening degree of the electronic expansion valve needs to be very small.

[0003] For a valve with a directly opened hole in the valve seat or the valve core for constant communication at a small opening degree, due to the small aperture and low dimensional accuracy of the hole, the accuracy at the small opening degree of the valve needs to be further improved. Summary of the Invention

[0004] The following technical solution is provided: A valve, the valve includes a valve seat and a first pipe fitting. The valve seat has an inlet passage and an outlet passage. The first pipe fitting has a first port and a second port. The first port is communicated with the inlet passage, and the second port is communicated with the outlet passage.

[0005] For such a valve, which includes a valve seat and a first pipe fitting, the valve seat has an inlet passage and an outlet passage, the first pipe fitting has a first port and a second port, the first port is communicated with the inlet passage, and the second port is communicated with the outlet passage. The manufacturing accuracy of the pipe fitting is relatively high. By using the first pipe fitting as the flow passage at the small opening degree of the valve, the accuracy at the small opening degree of the valve is improved. Brief Description of the Drawings

[0006] Figure 1 is a schematic structural diagram of an embodiment of the valve in the present invention;

[0007] Figure 2 is Figure 1 a partial enlarged view of part A in

[0008] Figure 3 is a partial structural schematic diagram of another embodiment of the valve in the present invention;

[0009] Figure 4 is a partial structural schematic diagram of yet another embodiment of the valve in the present invention.

[0010] Reference Signs:

[0011] Valve seat 1, inlet passage 11, outlet passage 12, valve orifice part 13, accommodation cavity 14, valve body 15, first extension part 16,

[0012] First pipe fitting 2, first port 21, second port 22, first pipe part 23, second pipe part 24, third pipe part 25,

[0013] Valve stem 3, first body 31, first protrusion 32,

[0014] First component 4, first wall surface 41, second wall surface 42, bottom wall portion 43, first connection body 441, first support portion 442, first mating portion 443, second protrusion 444, second main body portion 45,

[0015] Intermediate member 5, sleeve 6, rotor 7, lead screw 8, nut 9, gasket 10. Detailed implementation mode

[0016] The technical solutions of the detailed implementation mode will be described below with reference to the accompanying drawings.

[0017] It should be noted that: Although this specification has described the present invention in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the art can still modify, combine, or equivalently replace the present invention, and all technical solutions and their improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

[0018] Reference Figure 1 , a valve, the valve includes a valve seat 131, an intermediate member 5 and a sleeve 6, one end of the intermediate member 5 is sleeved on the valve seat 1 and welded to the valve seat 1 in the middle, the sleeve 6 is sleeved on the other end of the intermediate member 5, and the sleeve 6 is welded to the intermediate member 5.

[0019] Reference Figure 1 , the valve includes a rotor 7, a lead screw 8, a nut 9 and a gasket 10, the lead screw 8 passes through the nut 9, the lead screw 8 is in threaded cooperation with the nut 9, the rotor 7 is fixed to the end of the lead screw 8 away from the valve seat 1, and the gasket 10 is injection molded with the nut 9 as an insert, and the gasket 10 is welded to the intermediate member 5.

[0020] Reference Figure 1 , the valve seat 1 includes a valve body 15 and a first extension portion 16, the first extension portion 16 extends from the valve body 15, the first extension portion 16 is sleeved on the valve stem 3, and the valve stem 3 can move up and down along the first extension portion 16.

[0021] Reference Figure 1 and Figure 2 , the valve includes a first pipe fitting 2, the valve seat 1 has an inlet passage 11 and an outlet passage 12, the first pipe fitting 2 has a first port 21 and a second port 22, the first port 21 is communicated with the inlet passage 11, and the second port 22 is communicated with the outlet passage 12.

[0022] Such a valve, the valve includes a valve seat 1 and a first pipe fitting 2. The valve seat 1 has an inlet passage 11 and an outlet passage 12. The first pipe fitting 2 has a first port 21 and a second port 22. The first port 21 communicates with the inlet passage 11, and the second port 22 communicates with the outlet passage 12. The manufacturing precision of the pipe fitting is relatively high. By using the first pipe fitting 2 as the flow passage with a small opening degree of the valve, the precision of the small opening degree of the valve is improved.

[0023] Reference Figure 1 , the inlet passage 11 is located in the valve body 15. The inlet passage 11 extends radially in the valve body 15. The outlet passage 12 is located in the valve body 15. The outlet passage 12 extends axially in the valve body 15.

[0024] Reference Figure 1 , the valve seat 1 has a receiving cavity 14. The receiving cavity 14 can communicate the inlet passage 11 with the outlet passage 12. The first port 21 is located in the receiving cavity 14. In the direction of the center line of the outlet passage 12, at least part of the second port 22 coincides with the outlet passage 12. After the valve is closed, the fluid can flow from the inlet passage 11 through the first port 21 into the first pipe fitting 2, and then through the second port 22 into the outlet passage 12 to achieve small-flow circulation.

[0025] Reference Figure 1 - Figure 2 , the valve includes a first component 4. At least part of the first pipe fitting 2 is located in the first component 4. The first pipe fitting 2 is fixed or limited in position with respect to the first component 4. The valve includes a valve stem 3. The first component 4 is fixed or limited in position with respect to the valve stem 3. Since the valve stem 3 is relatively small and the diameter of the first pipe fitting 2 is relatively small, after the first pipe fitting 2 is fixed to the first component 4 first, the first pipe fitting 2 is fixed to the valve stem 3 by fixing the first component 4 to the valve stem 3, which is convenient for assembly.

[0026] Reference Figure 1 - Figure 2 , the valve seat 1 has a valve orifice portion 13. The first component 4 cooperates with the valve orifice portion 13 to adjust the flow rate and control the on-off of the valve. The first component 4 has a first installation cavity. The end of the valve stem 3 adjacent to the valve orifice portion 13 is located in the first installation cavity. The first component 4 is fixed or limited in position with respect to the valve stem 3.

[0027] Reference Figure 1 - Figure 2 , the material of the first component 4 is metal, and the material of the first pipe fitting 2 is metal. The first pipe fitting 2 and the first component 4 are integrally formed. With the first pipe fitting 2 as an insert, the first pipe fitting 2 and the first component 4 are integrally formed. The materials of the first pipe fitting 2 and the first component 4 can be the same or different. The first pipe fitting 2 penetrates through the first component 4. The wall portion of the valve stem 3 corresponding to the first installation cavity is welded, thread-connected or interference-fitted.

[0028] Of course, a hole can be opened in the first component 4, and the hole can be filled with a component of a flexible material, such as rubber, and then the first tube 2 can be passed through the rubber to fix the first tube 2 to the first component 4. Similar structural designs will be described below and will not be repeated here.

[0029] refer to Figure 2 The first component 4 has a first wall 41 and a second wall 42, the first port 21 is located on the side of the first wall 41 away from the second wall 42 and / or the second port 22 is located on the side of the second wall 42 away from the first wall 41, one end of the first pipe 2 extends to the first component 4 and / or the other end of the first pipe 2 extends to the first component 4. When the first pipe 2 and the first component 4 are integrally formed, it is convenient to clamp and position the first pipe 2 and prevent the first pipe 2 from being blocked.

[0030] refer to Figure 2 When the valve is closed, the second port 22 is located at the outlet channel 12 .

[0031] refer to Figure 3 The first component 4 is made of rubber, the valve stem 3 includes a first body 31 and a first protrusion 32, the first protrusion 32 protrudes from the peripheral wall of the first body 31, the first component 4 has a second accommodating cavity, the first protrusion 32 is located in the second accommodating cavity, the first component 4 has a bottom wall portion 43, and the bottom wall portion 43 contacts the end of the first body 31.

[0032] The valve stem 3 and the first component 4 can be injection molded, and the first pipe 2 and the first component 4 can be injection molded, and the injection molding can be performed simultaneously, which will not be described in detail here.

[0033] refer to Figure 3 The cross-section of the first pipe fitting 2 is circular. The first pipe fitting 2 includes a first pipe portion 23. The first component 4 has a first accommodating cavity. The first pipe portion 23 is located in the first accommodating cavity. The center line of the first pipe portion 23 is a curve, such as an arc. The center line of the first pipe portion 23 is the line where the center of the cross-section of the first pipe portion 23 is located. The first pipe portion 23 is arc-shaped, which prevents the first pipe fitting 2 from separating from the first component 4 and improves the bonding strength between the first pipe fitting 2 and the first component 4.

[0034] refer to Figure 3 The first pipe fitting 2 includes a second pipe portion 24 and a third pipe portion 25. The second pipe portion 24 is located at one end of the first pipe portion 23, and the third pipe portion 25 is located at the other end of the first pipe portion 23. The second pipe portion 24 is a straight pipe portion, and part of the second pipe portion 24 is located in the first accommodating cavity. The third pipe portion 25 is a straight pipe portion, and part of the third pipe portion 25 is located in the first accommodating cavity.

[0035] refer to Figure 4, the first component 4 includes a first connecting portion and a second main body portion 45. The first connecting portion includes a first connecting body 441, a first supporting portion 442, and a first mating portion 443. Radially of the first connecting body 441, the first supporting portion 442 extends outward from the end of the first connecting body 441, and the first mating portion 443 extends obliquely from the end of the first supporting portion 442 remote from the first connecting body 441. The first mating portion 443 is engaged with the valve port portion 13. At least a part of the second main body portion 45 is located between the first connecting body 441 and the first mating portion 443. The first pipe fitting 2 passes through the second main body portion 45. The first connecting body 441 is sleeved on the valve stem 3, and the first connecting body 441 is welded, threadedly connected, or interference-fitted with the valve stem 3.

[0036] Reference Figure 4 , the material of the second main body portion 45 is rubber. The first connecting portion includes a second protruding portion 444 that protrudes from the outer peripheral wall of the first connecting body 441. The second main body portion 45 includes a third receiving cavity, and the second protruding portion 444 is located in the third receiving cavity. The first connecting portion and the second main body portion 45 are injection-molded. The first supporting portion 442 has a first through hole, and the first pipe fitting 2 passes through the first through hole. A part of the second main body portion 45 is located between the first pipe fitting 2 and the hole wall corresponding to the first through hole.

[0037] Reference Figure 4 , the distance between the top wall of the first connecting body 441 and the first supporting portion 442 is greater than the distance between the top wall of the second main body portion 45 and the second supporting portion. The top wall of the second main body portion 45 is welded to the valve stem 3 to reduce the influence on the second main body portion 45 when the first connecting body 441 is welded to the valve stem 3.

[0038] Of course, the first connecting body 441 can be interference-fitted or threadedly connected with the valve stem 3 (the sealing performance of the connection can be ensured by applying glue, etc.), which will not be elaborated here.

[0039] Of course, the first component 4 can be fixed or limited to the valve seat 1, which will not be elaborated here.

[0040] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A valve, characterized in that, The valve includes a valve seat (1) and a first pipe fitting (2). The valve seat (1) has an inlet passage (11) and an outlet passage (12). The first pipe fitting (2) has a first port (21) and a second port (22). The first port (21) communicates with the inlet passage (11), and the second port (22) communicates with the outlet passage (12).

2. The valve according to claim 1, characterized in that, The valve includes a first component (4). At least a part of the first pipe fitting (2) is located in the first component (4), and the first pipe fitting (2) is fixed or limited in position with respect to the first component (4). The first component (4) is fixed or limited in position with respect to the valve seat (1). Alternatively, the valve includes a valve stem (3), and the first component (4) is fixed or limited in position with respect to the valve stem (3).

3. The valve according to claim 2, wherein The first pipe fitting (2) is integrally formed with the first component (4). The first component (4) has a first wall surface (41) and a second wall surface (42). The first port (21) is located on a side of the first wall surface (41) facing away from the second wall surface (42) and / or the second port (22) is located on a side of the second wall surface (42) facing away from the first wall surface (41).

4. The valve according to claim 3, characterized in that, The first pipe fitting (2) includes a first pipe portion (23). The first component (4) has a first receiving cavity, and the first pipe portion (23) is located in the first receiving cavity. The center line of the first pipe portion (23) is a curve.

5. The valve according to claim 4, characterized in that, The first pipe fitting (2) includes a second pipe portion (24) and a third pipe portion (25). The second pipe portion (24) is located at one end of the first pipe portion (23), and the third pipe portion (25) is located at the other end of the first pipe portion (23). The second pipe portion (24) is a straight pipe portion, and a part of the second pipe portion (24) is located in the first receiving cavity. The third pipe portion (25) is a straight pipe portion, and a part of the third pipe portion (25) is located in the first receiving cavity.

6. The valve according to any one of claims 2-5, characterized in that, The valve seat (1) has a valve orifice portion (13). The first component (4) cooperates with the valve orifice portion (13). The first component (4) has a first installation cavity. The end of the valve stem (3) adjacent to the valve orifice portion (13) is located in the first installation cavity, and the first component (4) is fixed or limited in position with respect to the valve stem (3).

7. The valve according to claim 6, characterized in that, The material of the first component (4) is metal, and the material of the first pipe fitting (2) is metal. The first pipe fitting (2) penetrates through the first component (4), and the wall portion of the valve stem (3) corresponding to the first installation cavity is welded, thread - connected or interference - fitted.

8. The valve according to claim 6, characterized in that, The material of the first component (4) is rubber. The valve stem (3) includes a first body (31) and a first protrusion (32). The first protrusion (32) protrudes from the peripheral wall of the first body (31). The first component (4) has a second receiving cavity, and the first protrusion (32) is located in the second receiving cavity. The first component (4) has a bottom wall portion (43), and the bottom wall portion (43) contacts the end of the first body (31).

9. The valve according to claim 6, wherein, The first component (4) includes a first connecting portion and a second main body portion (45). The first connecting portion includes a first connecting body (441), a first supporting portion (442), and a first mating portion (443). Radially of the first connecting body (441), the first supporting portion (442) extends outward from the end of the first connecting body (441). The first mating portion (443) extends obliquely from the end of the first supporting portion (442) away from the first connecting body (441). The first mating portion (443) mates with the valve port portion (13). At least part of the second main body portion (45) is located between the first connecting body (441) and the first mating portion (443). The first pipe fitting (2) passes through the second main body portion (45). The first connecting body (441) is sleeved on the valve stem (3), and the first connecting body (441) is welded, threadedly connected, or interference-fitted with the valve stem (3).

10. The valve according to claim 9, characterized in that, The material of the second main body portion (45) is rubber. The first connecting portion includes a second protruding portion (444). The second protruding portion (444) protrudes from the outer peripheral wall of the first connecting body (441). The second main body portion (45) includes a third accommodating cavity. The second protruding portion (444) is located in the third accommodating cavity. The first supporting portion (442) has a first through hole. The first pipe fitting (2) passes through the first through hole. Part of the second main body portion (45) is located between the first pipe fitting (2) and the hole wall corresponding to the first through hole.

11. The valve according to claim 10, wherein, The distance between the top wall of the first connecting body (441) and the first supporting portion (442) is greater than the distance between the top wall of the second main body portion (45) and the second supporting portion. The top wall of the second main body portion (45) is welded to the valve stem (3).

12. The valve according to any one of claims 7-11, characterized in that, The valve seat (1) has an accommodating cavity (14). The accommodating cavity (14) can communicate the inlet passage (11) with the outlet passage (12). The first port (21) is located in the accommodating cavity (14). In the center line direction of the outlet passage (12), at least part of the second port (22) coincides with the outlet passage (12).

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