Valve

Abstract

A valve comprises a valve seat and a valve core, the valve comprises a guide piece, the guide piece is connected with the valve core, the valve seat comprises a first stop part and a second stop part, the guide piece is provided with a first guide part, and in the radial direction of the valve seat, the first guide part is located between the first stop part and the second stop part. According to the valve, the valve comprises a guide part, the guide part is connected with the valve element, the valve seat comprises a first stop part and a second stop part, the guide part is provided with a first guide part, the first guide part is located between the first stop part and the second stop part in the radial direction of the valve seat, and when the valve element deviates, the first guide part makes contact with the first stop part or the second stop part. The offset of the valve core is reduced, and the matching degree of the valve core and the valve port 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] A valve includes a housing, a valve seat, a rotor, a nut, a screw rod, and a valve core. The housing is fixed to the valve seat. The valve has a valve cavity. The rotor, the nut, and the screw rod are located in the valve cavity. The rotor is fixedly connected to the screw rod. The valve core is connected to the screw rod with a limit. The valve seat has a valve port. The rotor drives the screw rod to rotate. Since the screw rod is in threaded engagement with the nut, the screw rod moves up and down, so that the valve core moves up and down to close or open the valve port.

[0003] When closing the valve, due to the impact force of the fluid on the valve core, the valve core is displaced, and the fit between the valve core and the valve port needs to be improved. Summary of the Invention

[0004] The following technical solution is provided: A valve includes a valve seat and a valve core. The valve includes a guiding member, and the guiding member is connected to the valve core. The valve seat includes a first stop portion and a second stop portion. The guiding member has a first guiding portion. In the radial direction of the valve seat, the first guiding portion is located between the first stop portion and the second stop portion.

[0005] For such a valve, the valve includes a guiding member, the guiding member is connected to the valve core, the valve seat includes a first stop portion and a second stop portion, the guiding member has a first guiding portion, and in the radial direction of the valve seat, the first guiding portion is located between the first stop portion and the second stop portion. When the valve core is displaced, the first guiding portion contacts the first stop portion or the second stop portion, reducing the displacement of the valve core and improving the fit between the valve core and the valve port. Brief Description of the Drawings

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

[0007] Figure 2 is another schematic structural view of an embodiment of the valve in the present invention;

[0008] Figure 3 is a top view of an embodiment of the valve in the present invention;

[0009] Figure 4 is Figure 3 a partial enlarged view of part A in

[0010] Figure 5 is a schematic structural view of the valve core and the guiding member of an embodiment of the valve in the present invention;

[0011] Figure 6 is a top view of the valve core of an embodiment of the valve in the present invention;

[0012] Figure 7 It is a schematic structural diagram of a valve seat of an embodiment of the valve in the present invention;

[0013] Figure 8 It is Figure 7 a partial enlarged view of part B in

[0014] Figure 9 It is a schematic structural diagram of a valve core and a guide member of another embodiment of the valve in the present invention;

[0015] Figure 10 It is Figure 9 a partial enlarged view of part C in

[0016] Reference numerals:

[0017] valve seat 1, first stop portion 11, third wall portion 111, second stop portion 12, fourth wall portion 121, first wall portion 13, second wall portion 14, bottom wall portion 15, first opening 16, valve port portion 17, inlet 18,

[0018] valve core 2, first mounting groove 21, first valve portion 22, first groove 23,

[0019] guide member 3, first guiding portion 31, first connecting portion 32, second mounting groove 321, second connecting portion 33, first mounting portion 34,

[0020] intermediate member 4, first screw member 5, first screw main body 51, lifting lug 52, first bushing 6. Detailed implementation manners

[0021] The technical solutions of the detailed implementation manners will be described below with reference to the accompanying drawings.

[0022] 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.

[0023] Referring to Figure 1 - Figure 2 , a valve includes a valve seat 11, an intermediate member 4, and a sleeve 2. The sleeve is sleeved on one end of the intermediate member 4 and welded to the intermediate member 4, and the other end of the intermediate member 4 is sleeved on the valve seat 1 and welded to the valve seat 1.

[0024] Referring to Figure 1 - Figure 2, the valve includes a first screw member 5 and a first bushing 6. The first screw member 5 includes a first screw main body 51 and a lug 52. The lug 52 protrudes from the outer peripheral wall of the first screw main body 51. The valve includes a valve core 2 which has a first groove 23. The first groove 23 extends from the wall portion of the valve core 2 that is away from the bottom wall of the first valve portion 22. The lug 52 is partially located in the first groove 23. In the radial direction of the first screw main body 51, the lug 52 penetrates through the valve core 2. The first bushing 6 is located on the side of the lug 52 that faces away from the first valve portion 22. The first bushing 6 is fixed to the valve core 2. The valve includes a first sleeve which has a second groove. The lug 52 is partially located in the first groove 23.

[0025] Reference Figure 1 - Figure 2 , the valve includes a lead screw and a rotor. The lead screw has an external thread. The first screw main body 51 has an internal thread that matches the external thread. The rotor is fixed to the lead screw. A coil assembly is provided outside the sleeve. The rotor rotates under the action of the coil assembly and drives the lead screw to rotate. Since the lead screw is in threaded engagement with the first screw main body 51, in the circumferential direction of the first sleeve, the lug 52 is limited in the first groove 23. The first screw main body 51 drives the valve core 2 to move up and down. The first valve portion 22 (described below) of the valve core 2 cooperates with the valve port portion 17 (described below) of the valve seat 1 to achieve valve closing.

[0026] Reference Figure 1 , the valve includes a guide member 3 which is connected to the valve core 2. The valve seat 1 includes a first stop portion 11 and a second stop portion 12. The guide member 3 has a first guide portion 31. In the radial direction of the valve seat 1, the first guide portion 31 is located between the first stop portion 11 and the second stop portion 12.

[0027] For such a valve, the valve includes a guide member 3 which is connected to the valve core 2. The valve seat 1 includes a first stop portion 11 and a second stop portion 12. The guide member 3 has a first guide portion 31. In the radial direction of the valve seat 1, the first guide portion 31 is located between the first stop portion 11 and the second stop portion 12. When the valve core 2 is offset, the first guide portion 31 contacts the first stop portion 11 or the second stop portion 12, reducing the offset of the valve core 2 and improving the matching degree between the valve core 2 and the valve port.

[0028] The valve seat 1 has an inlet 18. In the axial direction of the valve core 2, the second stop portion 12 is opposite to the inlet 18, improving the matching degree between the valve core 2 and the valve port portion 17.

[0029] Of course, the number of inlets 18 can be multiple. The multiple inlets 18 are arranged in the circumferential direction of the valve seat 1. In the axial direction of the valve core 2, the second stop portion 12 is opposite to one of the inlets 18.

[0030] Reference Figure 5, the guiding member 3 includes a first connecting portion 32 and a second connecting portion 33. The first guiding portion 31 is located at one end of the second connecting portion 33, and the first connecting portion 32 is located at the other end of the second connecting portion 33. It is defined that the plane passing through the center line of the second connecting portion 33 and the center line of the first guiding portion 31 is the first plane, and the center line of the first connecting portion 32 is perpendicular to the first plane.

[0031] Reference Figure 5 - Figure 6 , the first connecting portion 32, the second connecting portion 33 and the first guiding portion 31 are an integral part. The valve core 2 has a first installation groove 21, and the first installation groove 21 is recessed in the wall portion of the valve core 2 facing the first guiding portion 31. A part of the first connecting portion 32 is located in the first installation groove 21, which is convenient for the installation and positioning of the guiding member 3. The first connecting portion 32 is in interference fit with the first installation groove 21 and / or the first connecting portion 32 is welded to the valve core 2.

[0032] Reference Figure 7 - Figure 8 , the valve seat 1 has a first wall portion 13 and a second wall portion 14. The first stop portion 11 is located between the first wall portion 13 and the second wall portion 14. The second stop portion 12 protrudes from the first wall portion 13. The second stop portion 12 has a first preset distance from the second wall portion 14. The valve seat 1 forms an L-shaped groove, and the L-shaped groove extends along the axial direction of the valve seat 1.

[0033] Reference Figure 3 - Figure 4 , the minimum distance between the first guiding portion 31 and the first stop portion 11 is L1, 0mm ≤ L1 ≤ 1mm, and the minimum distance between the first guiding portion 31 and the second stop portion 12 is L2, 0mm ≤ L2 ≤ 1mm.

[0034] Reference Figure 3 - Figure 4 , the first guiding portion 31 is cylindrical. It is defined that the wall surface of the first stop portion 11 facing the second stop portion 12 is the third wall portion 111, and the third wall portion 111 is a plane. The distance between the third wall portion 111 and the first guiding portion 31 is L1, 0.5mm ≤ L1 ≤ 1mm. It is defined that the wall surface of the second stop portion 12 facing the first stop portion 11 is the fourth wall portion 121, and the fourth wall portion 121 is a plane. The distance between the first guiding portion 31 and the fourth wall portion 121 is L2, 0.5mm ≤ L2 ≤ 1mm.

[0035] Of course, the first connecting portion 32, the second connecting portion 33 and the first guiding portion 31 can also be of other shapes, such as a cuboid, etc., which will not be elaborated here.

[0036] Reference Figure 3 - Figure 4, circumferentially on the valve seat 1, the second connecting portion 33 is located between the second stop portion 12 and the second wall portion 14. The minimum distance between the second connecting portion 33 and the second stop portion 12 is L3, where 0 mm ≤ L3 ≤ 1 mm. The minimum distance between the second connecting portion 33 and the second wall portion 14 is L4, where 0 mm ≤ L4 ≤ 1 mm. When the valve core 2 deflects, the second connecting portion 33 contacts the second wall portion 14 or the second connecting portion 33 contacts the first wall portion 13, reducing the deflection of the valve core 2.

[0037] Reference Figure 3 - Figure 4 , circumferentially on the valve core 2, the first guiding portion 31 is located between the first wall portion 13 and the second wall portion 14. The minimum distance between the first guiding portion 31 and the first wall portion 13 is L5, where 0 mm ≤ L5 ≤ 1 mm. The minimum distance between the first guiding portion 31 and the second wall portion 14 is L6, where 0 mm ≤ L6 ≤ 1 mm. When the valve core 2 deflects, the first guiding portion 31 contacts the first wall portion 13 or the first guiding portion 31 contacts the second wall portion 14, reducing the deflection of the valve core 2.

[0038] Reference Figure 7 - Figure 8 , the valve seat 1 includes a bottom wall portion 15. The valve seat 1 includes a first opening 16 which is generally L-shaped. A part of the first opening 16 is located between the first stop portion 11 and the second stop portion 12, and a part of the first opening 16 is located between the second wall portion 14 and the third wall portion 111. The valve seat 1 includes a valve port portion 17. The first stop portion 11 extends from the valve port portion 17, the second stop portion 12 extends from the valve port portion 17, the second wall portion 14 extends from the valve port portion 17, and the third wall portion 111 extends from the valve port portion 17.

[0039] Reference Figure 4 - Figure 8 , the valve core 2 includes a first valve portion 22 which cooperates with the valve port portion 17. The first valve portion 22 is frustum-shaped, and the diameter of the bottom wall of the first valve portion 22 is smaller than the diameter of the upper wall of the first valve portion 22. The first guiding portion 31 is connected to the first valve portion 22, and the first guiding portion 31 has a second preset distance from the inner wall of the valve port portion 17.

[0040] During assembly, the valve core 2 is inserted into the valve seat 1 from above the valve seat 1 (in contact with the valve seat 1), and the guiding member 3 is inserted into the valve seat 1 from below the valve seat 1. The first guiding portion 31 is located between the first stop portion 11 and the second stop portion 12. The end of the first connecting portion 32 away from the first guiding portion 31 is inserted into the first installation groove 21. If necessary, the guiding member 3 and the valve core 2 can be welded.

[0041] Reference Figure 9 - Figure 10, the first guiding part 31 and the second connecting part 33 are integral parts. The first connecting part 32 has a second installation groove 321 which is recessed in the wall part of the first connecting part 32 away from the valve core 2. The guiding part 3 has a first installation part 34 which protrudes from the end part of the second connecting part 33 away from the first guiding part 31. The first installation part 34 is adapted to the first installation groove 21, facilitating the assembly and positioning of the second connecting part 33. The second connecting part 33 is welded to the first connecting part 32 and / or the first installation part 34 is in interference fit with the second installation groove 321. The second connecting part 33 is connected to the end part of the first connecting part 32 away from the valve core 2, facilitating installation.

[0042] 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 limitations on 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, comprising a valve seat (1) and a valve core (2), characterized in that, The valve includes a guide member (3), the guide member (3) is connected to the valve core (2), the valve seat (1) includes a first stop portion (11) and a second stop portion (12), the guide member (3) has a first guiding portion (31), in the radial direction of the valve seat (1), the first guiding portion (31) is located between the first stop portion (11) and the second stop portion (12).

2. The valve according to claim 1, characterized in that, The minimum distance between the first guiding portion (31) and the first stop portion (11) is L1, 0mm ≤ L1 ≤ 1mm, the minimum distance between the first guiding portion (31) and the second stop portion (12) is L2, 0mm ≤ L2 ≤ 1mm.

3. The valve according to claim 2, characterized in that, The valve seat (1) has a first wall portion (13) and a second wall portion (14), the first stop portion (11) is located between the first wall portion (13) and the second wall portion (14), the second stop portion (12) protrudes from the first wall portion (13), and the second stop portion (12) has a first preset distance from the second wall portion (14).

4. The valve according to claim 3, characterized in that, The guide member (3) includes a first connecting portion (32) and a second connecting portion (33), the first guiding portion (31) is located at one end of the second connecting portion (33), the first connecting portion (32) is located at the other end of the second connecting portion (33), it is defined that the plane passing through the center line of the second connecting portion (33) and the center line of the first guiding portion (31) is the first plane, and the center line of the first connecting portion (32) is perpendicular to the first plane.

5. The valve according to claim 4, characterized in that, The first guiding portion (31) is cylindrical, it is defined that the wall surface of the first stop portion (11) facing the second stop portion (12) is the third wall portion (111), the third wall portion (111) is a plane, the distance between the third wall portion (111) and the first guiding portion (31) is L1, 0.5mm ≤ L1 ≤ 1mm, it is defined that the wall surface of the second stop portion (12) facing the first stop portion (11) is the fourth wall portion (121), the fourth wall portion (121) is a plane, and the distance between the first guiding portion (31) and the fourth wall portion (121) is L2, 0.5mm ≤ L2 ≤ 1mm.

6. The valve according to claim 5, characterized in that, The second connecting portion (33) is located between the second stop portion (12) and the second wall portion (14), the minimum distance between the second connecting portion (33) and the second stop portion (12) is L3, 0mm ≤ L3 ≤ 1mm, the minimum distance between the second connecting portion (33) and the second wall portion (14) is L4, 0mm ≤ L4 ≤ 1mm; And / or, in the circumferential direction of the valve core (2), the first guiding portion (31) is located between the first wall portion (13) and the second wall portion (14), the minimum distance between the first guiding portion (31) and the first wall portion (13) is L5, 0mm ≤ L5 ≤ 1mm, the minimum distance between the first guiding portion (31) and the second wall portion (14) is L6, 0mm ≤ L6 ≤ 1mm.

7. The valve according to claim 6, characterized in that, The first connecting portion (32), the second connecting portion (33) and the first guiding portion (31) are an integral part. The valve core (2) has a first installation groove (21). The first installation groove (21) is recessed in the wall portion of the valve core (2) facing the first guiding portion (31). A part of the first connecting portion (32) is located in the first installation groove (21). The first connecting portion (32) is in interference fit with the first installation groove (21) and / or the first connecting portion (32) is welded to the valve core (2).

8. The valve according to claim 6, characterized in that, The first guiding portion (31) and the second connecting portion (33) are an integral part. The first connecting portion (32) has a second installation groove (321). The second installation groove (321) is recessed in the wall portion of the first connecting portion (32) away from the valve core (2). The guiding member (3) has a first installation portion (34). The first installation portion (34) protrudes from the end portion of the second connecting portion (33) away from the first guiding portion (31). The first installation portion (34) is adapted to the second installation groove (321). The second connecting portion (33) is welded to the first connecting portion (32) and / or the first installation portion (34) is in interference fit with the second installation groove (321).

9. The valve according to any one of claims 3-8, characterized in that, The valve seat (1) includes a bottom wall portion (15). The valve seat (1) includes a first opening (16). The first opening (16) is generally L-shaped. A part of the first opening (16) is located between the first stop portion (11) and the second stop portion (12). A part of the first opening (16) is located between the second wall portion (14) and the third wall portion (111). The valve seat (1) includes a valve port portion (17). The first stop portion (11) extends from the valve port portion (17). The second stop portion (12) extends from the valve port portion (17). The second wall portion (14) extends from the valve port portion (17). The third wall portion (111) extends from the valve port portion (17).

10. The valve according to claim 9, characterized in that, The valve core (2) includes a first valve portion (22). The first valve portion (22) cooperates with the valve port portion (17). The first valve portion (22) is frustum-shaped. The diameter of the bottom wall of the first valve portion (22) is smaller than the diameter of the upper wall of the first valve portion (22). The first guiding portion (31) is connected to the first valve portion (22). The first guiding portion (31) has a second preset distance from the inner wall of the valve port portion (17).

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