Valve

Abstract

A valve comprises a valve seat, a sleeve, a rotor assembly and a nut assembly, the valve seat is fixed to one end of the sleeve, the valve is provided with a containing cavity, the rotor assembly is located in the containing cavity, the nut assembly is located in the containing cavity, and the valve is characterized in that the valve is provided with an inlet connecting pipe, the inlet connecting pipe is provided with a first pipe connecting part, and the valve seat is provided with a first opening; the rotor assembly comprises a screw rod assembly and a valve element head, the valve seat is provided with a valve port part, the valve element head is matched with the valve port part, the screw rod assembly is provided with a fixing part, the valve element head is rotationally connected with the fixing part in a defined mode, the valve element head is provided with a point A, and the point B is provided with a point C; the valve comprises a first pipe connecting part and a second pipe connecting part, the surface perpendicular to the axial direction of the first pipe connecting part is a first surface, the valve has a first state and a second state, in the first state, the distance between the point A and the first surface is L1, in the second state, the distance between the point A and the first surface is L2, and L1 is larger than L2. And the matching degree of the valve core head and the valve port part is improved.

Description

Technical Field

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

[0002] refer to Figure 6 , an electronic expansion valve, the electronic expansion valve comprises a housing 10 、 、Valve seat 12 、 、Guide sleeve 20 、 、Rotor 40 、 、Screw 50 、 And valve needle 60 、 , housing 10 、 With valve seat 12 、 Fixed, the electronic expansion valve has a valve chamber, a guide sleeve 20 、 、Rotor 40 、 、Screw 50 、 And valve needle 60 、 Located in the valve cavity, the rotor 40 、 With screw 50 、 Fixed connection, valve seat 12 、 With valve port, screw 50 、 Drive valve needle 60 、 Axial movement, so that the valve needle 60 、 Open or close the valve port.

[0003] refer to Figure 6 , the electronic expansion valve has an inlet connection 21 、 , import takeover 21 、 Located in housing 10 、 During the valve closing process, due to the valve needle 60 、 Need to be in the guide sleeve 20 、 Internal movement, valve needle 60 、 With guide sleeve 20 、 There is a certain gap between them, and the working medium is connected to the inlet pipe 21 、 Entering the valve cavity will impact the valve needle 60 、 , so that the valve needle 60 、 Towards away from the inlet connection 21 、 Direction deviation, valve needle 60 、 The degree of coordination with the valve port needs to be improved. Summary of the invention

[0004] The following technical solution is provided: a valve, comprising a valve seat, a sleeve, a rotor assembly and a nut assembly, wherein the valve seat is fixed to one end of the sleeve, the valve has an accommodating chamber, the rotor assembly is located in the accommodating chamber, the nut assembly is located in the accommodating chamber, the valve has an inlet pipe, the inlet pipe has a first pipe portion, the valve seat has a first port, one end of the first pipe portion is located at the first port, the rotor assembly comprises a screw assembly and a valve core head, the valve seat has a valve port portion, the valve core head cooperates with the valve port portion, the screw assembly has a fixed portion, the valve core head is rotatably connected to the fixed portion, and it is defined that the valve core head has a point A, and the surface perpendicular to the axial direction of the first pipe portion is the first surface, the valve has a first state and a second state, in the first state, the sealing head abuts against the valve port portion, and the distance between point A and the first surface is L1, and in the second state, the sealing head abuts against the valve port portion, and the distance between point A and the first surface is L2, and L1>L2.

[0005] In such a valve, the screw rod assembly has a fixed part, and the valve core head is rotatably connected to the fixed part. It is defined that the valve core head has a point A, and the surface perpendicular to the axial direction of the first connecting portion is the first surface. The valve has a first state and a second state. In the first state, the distance between point A and the first surface is L1, and in the second state, the distance between point A and the first surface is L2, L1>L2. When closing the valve, the valve core head is rotatably connected to the fixed part. After the valve core head abuts against the valve mouth, it can have a component of movement toward the first connecting portion under the force applied by the valve mouth, thereby improving the fit between the valve core head and the valve mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a cross-sectional view of the valve in the invention;

[0007] Figure 2 yes Figure 1 A magnified view of part A;

[0008] Figure 3 It is a schematic diagram of the partial structure of the valve in the present invention;

[0009] Figure 4 is a cross-sectional view of the valve seat in the present invention;

[0010] Figure 5 is a cross-sectional view of the first rod in the present invention;

[0011] Figure 6 It is a cross-sectional view of a valve in the background art.

[0012] Reference numerals:

[0013] Valve seat 1, first port 11, valve port portion 12, sleeve 2,

[0014] Sleeve 311, first mounting hole 3111, second mounting hole 3112, fourth main body 3113, first limiting portion 3114, first bottom wall 3115,

[0015] The first rod 312, the second main body 3121, the first sliding part 3122, the second sliding part 3123,

[0016] The first cylinder 313, the second cylinder 314, the screw rod 315, the stopper 316, the third main body 3161, the first protrusion 3162,

[0017] The valve core head 32, the first connecting portion 321, the first main body portion 322, the second connecting portion 323,

[0018] Magnetic rotor 33,

[0019] Nut 4,

[0020] Guide sleeve 5, second bottom wall 51,

[0021] Accommodating chamber 6 , first connecting pipe portion 71 . DETAILED DESCRIPTION

[0022] The technical solution of the specific implementation method is described below in conjunction with the accompanying drawings.

[0023] It should be noted that: although this specification has described the present invention in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that technicians in the relevant technical field can still modify, combine or replace the present invention with equivalents, and all technical solutions and improvements thereto 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.

[0024] refer to Figure 1 and Figure 4 A valve comprises a valve seat 1, a sleeve 2, a rotor assembly and a nut assembly. The valve seat 1 is fixed to one end of the sleeve 2. The valve has an accommodating chamber 6. The rotor assembly is located in the accommodating chamber 6. The nut 4 is located in the accommodating chamber 6. The rotor assembly comprises a magnetic rotor 33 and a screw rod assembly. The screw rod assembly comprises a screw rod 315. The magnetic rotor 33 and the screw rod 315 are fixed. The nut assembly comprises a nut 4. The screw rod 315 and the nut 4 are threadedly matched. The magnetic rotor 33 drives the screw rod 315 to rotate under the action of electromagnetic force. Due to the threaded match between the screw rod 315 and the nut 4, the screw rod 315 moves up and down. The rotor assembly comprises a valve core head 32. The screw rod 315 can drive the valve core head 32 to move up and down. The valve seat 1 has a valve port 12. When the screw rod 315 moves up and down, the valve core head 32 approaches or moves away from the valve port 12. The valve core head 32 cooperates with the valve port 12 to realize the opening and closing of the valve and flow regulation.

[0025] refer to Figure 1 and Figure 4 The valve has an inlet pipe, the inlet pipe has a first pipe portion 71, the valve seat 1 has a first port 11, one end of the first pipe portion 71 is located at the first port 11, the screw assembly has a fixed portion, and the valve core head 32 is rotatably connected to the fixed portion. It is defined that the valve core head 32 has a point A, and the surface perpendicular to the axial direction of the first pipe portion 71 is the first surface. The valve has a first state and a second state. In the first state, the sealing head 32 abuts against the valve port portion 12, and the distance between point A and the first surface is L1. In the second state, the sealing head 32 abuts against the valve port portion 12, and the distance between point A and the first surface is L2, and L1>L2.

[0026] For example, in the first state, the valve core head 32 just contacts the valve mouth 12 during the valve closing process, and in the second state, after the valve core head 32 contacts the valve mouth, the screw rod 315 continues to move downward, and the valve core head 32 is offset toward the first connecting pipe part 71 by the force of the valve mouth 12 until the valve is closed.

[0027] In such a valve, the screw rod assembly has a fixed portion, and the valve core head 32 is rotatably connected to the fixed portion. It is defined that the valve core head 32 has a point A, and the surface perpendicular to the axial direction of the first connecting portion 71 is the first surface. The valve has a first state and a second state. In the first state, the distance between point A and the first surface is L1, and in the second state, the distance between point A and the first surface is L2, L1-L2>0. When closing the valve, since the valve core head 32 is rotatably connected to the fixed portion, after the valve core head 32 abuts against the valve mouth portion 12, it can have a component of movement toward the first connecting portion 71 under the force applied by the valve mouth portion 12, thereby improving the fit between the valve core head 32 and the valve mouth portion 12.

[0028] Of course, the valve core head 32 may also have a component parallel to the first surface, for example, due to a gap generated by the rotational connection between the valve core head 32 and the fixed part or due to other design requirements, which will not be elaborated here.

[0029] refer to Figure 2 and Figure 3 The screw rod assembly has a sleeve 311 and a first rod 312, the sleeve 311 has a first mounting hole 3111 and a second mounting hole 3112, one end of the first rod 312 is located in the first mounting hole 3111, the other end of the first rod 312 is located in the second mounting hole 3112, the axis of the first rod 312 is parallel to the first surface, the valve core head 32 has a first connecting portion 321, the first connecting portion 321 has a third mounting hole, the first rod 312 is penetrated by the third mounting hole, and the fixing portion is located on the first rod 312.

[0030] refer to Figure 3-Figure 4The valve core head 32 includes a first main body 322, which is a part of a sphere, increases the weight of the valve core head 32, and reduces the offset of the valve core head 32. The line where the valve mouth 12 intersects with the first surface is an arc line. The valve mouth 12 is adapted to the first main body 322. The shape of the valve mouth 12 is a part of a spherical surface, and its radius is equal to the radius of the first main body 322. Figure 2 and Figure 3 The first rod 312 includes a second main body 3121, the second main body 3121 is cylindrical, the third mounting hole is a circular hole, the third mounting hole is adapted to the second main body 3121, and the center of the first main body 322 coincides with the center of the third mounting hole.

[0031] Of course, the first main body portion 322 may not be part of a sphere, and the center of the third mounting hole may not coincide with the center of the sphere of the first main body portion 322, which will not be elaborated here.

[0032] refer to Figure 3 The valve includes a guide sleeve 5, which is fixed to the valve seat 1 and sleeved on the sleeve 311. The guide sleeve 5 has a first outer peripheral wall, and a portion of the first outer peripheral wall is opposite to the first port 11. The sleeve 311 has a first bottom wall 3115. The guide sleeve 5 has a second bottom wall 51. The first bottom wall 3115 is located on the side of the second bottom wall 51 away from the valve port 12. The sleeve 311 does not extend out of the side of the guide sleeve 5 facing the valve seat 1, thereby reducing the impact of the fluid on the sleeve 311, reducing the displacement of the sleeve 311, and thus reducing the displacement of the valve core head 32.

[0033] refer to Figure 3 The valve core head 32 has a second connection part 323, which is cylindrical. The first connection part 321 is located on one side of the second connection, and the first main body part 322 is located on the other side of the second connection part 323. The second connection part 323 has a first top wall, and the distance between the first top wall and the first bottom wall 3115 is L3. The second connection part 323 has a second outer peripheral wall, and the guide sleeve 5 has a first inner peripheral wall, and the distance between the first outer peripheral wall and the first inner peripheral wall is L4, L3>L4. When the valve core head 32 is offset, the inner wall of the guide sleeve 5 is limited to reduce the force of the valve core head 32 on the sleeve 311, reduce the offset of the sleeve 311, and facilitate the movement of the valve core head 32 toward the first connecting pipe part 71.

[0034] refer to Figure 3 and Figure 5The first rod 312 includes a first sliding portion 3122 and a second sliding portion 3123. The first sliding portion 3122 is located at one end of the second main body portion 3121, and the second sliding portion 3123 is located at the other end of the second main body portion 3121. The first sliding portion 3122 is hemispherical in shape and can slide along the inner wall of the guide sleeve 5. The second sliding portion 3123 is hemispherical in shape and can slide along the inner wall of the guide sleeve 5.

[0035] Of course, the valve core head 32 may also be provided with a ball head, and the sleeve 311 may be provided with a receiving groove, and the ball head is located in the receiving groove and can rotate in the receiving groove, which will not be described in detail here.

[0036] refer to Figure 3 The screw rod assembly includes a screw rod 315 and a stopper 316, the stopper 316 includes a third main body portion 3161, the third main body portion 3161 is fixed to one end portion of the screw rod 315, the sleeve 311 includes a fourth main body portion 3113 and a first limiting portion 3114, the first limiting portion 3114 protrudes from the inner wall of the first main body portion 322, the third main body portion 3161 is located on the side of the first limiting portion 3114 facing the valve mouth portion 12, the third main body portion 3161 can abut against the first limiting portion 3114, the first limiting portion 3114 has a first groove, the first groove is recessed in the wall of the first limiting portion 3114 facing the valve mouth portion 12, the stopper 316 has a first convex portion 3162, the first convex portion 3162 protrudes from the third main body portion 3161, and the first convex portion 3162 is at least partially located in the first groove to prevent the valve core head 32 from driving the sleeve 311 to rotate.

[0037] refer to Figure 3 The screw assembly includes a first cylinder 313 , which is sleeved on the first rod 312 , one end of the first cylinder 313 abuts against the inner wall of the sleeve 311 , and the other end of the first cylinder 313 abuts against the first connecting portion 321 .

[0038] refer to Figure 3 The screw assembly includes a second cylinder 314, which is sleeved on the first rod 312, one end of the second cylinder 314 abuts against the inner wall of the sleeve 311, and the other end of the second cylinder 314 abuts against the first connecting part 321, the first cylinder 313 is located on one side of the first connecting part 321, and the second cylinder 314 is located on the other side of the first connecting part 321.

[0039] Of course, the first cylinder 313 and the valve core head 32 can be an integral part, and the second cylinder 314 and the valve core head 32 can be an integral part, which will not be elaborated here.

[0040] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A valve, comprising a valve seat (1), a sleeve (2), a rotor assembly and a nut assembly, wherein the valve seat (1) is fixed to one end of the sleeve (2), the valve has a receiving cavity (6), the rotor assembly is located in the receiving cavity (6), and the nut assembly is located in the receiving cavity (6), characterized in that: The valve has an inlet pipe, the inlet pipe has a first pipe portion (71), the valve seat (1) has a first port (11), one end of the first pipe portion (71) is located at the first port (11), the rotor assembly includes a screw assembly and a valve core head (32), the valve seat (1) has a valve port portion (12), the valve core head (32) cooperates with the valve port portion (12), the screw assembly has a fixed portion, the valve core head (32) is rotatably connected to the fixed portion, and it is defined that the valve core head (32) has a point A, and the surface perpendicular to the axial direction of the first pipe portion (71) is the first surface. The valve has a first state and a second state. In the first state, the sealing head (32) abuts against the valve port portion (12), and the distance between point A and the first surface is L1. In the second state, the sealing head (32) abuts against the valve port portion (12), and the distance between point A and the first surface is L2, and L1>L2.

2. The valve according to claim 1, characterized in that The screw rod assembly comprises a sleeve (311) and a first rod (312); the sleeve (311) comprises a first mounting hole (3111) and a second mounting hole (3112); one end of the first rod (312) is located in the first mounting hole (3111); the other end of the first rod (312) is located in the second mounting hole (3112); the axis of the first rod (312) is parallel to the first surface; the valve core head (32) comprises a first connecting portion (321); the first connecting portion (321) comprises a third mounting hole; the first rod (312) passes through the third mounting hole.

3. The valve according to claim 2, characterized in that The valve core head (32) comprises a first main body portion (322), the first main body portion (322) is a part of a sphere, the line where the valve mouth portion (12) intersects with the first surface is an arc line, and the valve mouth portion (12) is adapted to the first main body portion (322).

4. The valve according to claim 3, characterized in that The first rod (312) comprises a second main body (3121), the second main body (3121) is cylindrical, the third mounting hole is a circular hole, the third mounting hole is adapted to the second main body (3121), and the center of the first main body (322) coincides with the center of the third mounting hole.

5. The valve according to claim 4, characterized in that The valve comprises a guide sleeve (5), wherein the guide sleeve (5) is fixed to the valve seat (1), and the guide sleeve (5) is sleeved on the sleeve (311), and the guide sleeve (5) has a first outer peripheral wall, and a portion of the first outer peripheral wall is opposite to the first port (11), and the sleeve (311) has a first bottom wall (3115), and the guide sleeve (5) has a second bottom wall (51), and the first bottom wall (3115) is located on a side of the second bottom wall (51) that is away from the valve port (12).

6. The valve according to claim 5, characterized in that The valve core head (32) has a second connecting portion (323), the second connecting portion (323) is cylindrical, the first connecting portion (321) is located on one side of the second connecting portion (323), the first main body (322) is located on the other side of the second connecting portion (323), the second connecting portion (323) has a first top wall, the distance between the first top wall and the first bottom wall (3115) is L3, the second connecting portion (323) has a second outer peripheral wall, the guide sleeve (5) has a first inner peripheral wall, the distance between the first outer peripheral wall and the first inner peripheral wall is L4, L3>L4.

7. The valve according to claim 5, characterized in that The first rod (312) comprises a first sliding portion (3122) and a second sliding portion (3123), wherein the first sliding portion (3122) is located at one end of the second main body portion (3121), and the second sliding portion (3123) is located at the other end of the second main body portion (3121), the first sliding portion (3122) is in the shape of a hemisphere, and the first sliding portion (3122) can slide along the inner circumferential wall of the guide sleeve (5), and the second sliding portion (3123) is in the shape of a hemisphere, and the second sliding portion (3123) can slide along the inner circumferential wall of the guide sleeve (5).

8. The valve according to any one of claims 2 to 7, characterized in that: The screw rod assembly comprises a screw rod (315) and a stopper (316), wherein the stopper (316) comprises a third main body portion (3161), wherein the third main body portion (3161) is fixed to one end portion of the screw rod (315), and the sleeve (311) comprises a fourth main body portion (3113) and a first limiting portion (3114), wherein the first limiting portion (3114) protrudes from an inner wall of the first main body portion (322), and the third main body portion (3161) is located in the direction of the first limiting portion (3114). On one side of the valve mouth portion (12), the third main body portion (3161) can abut against the first limiting portion (3114), and the first limiting portion (3114) has a first groove, which is recessed in the wall of the first limiting portion (3114) facing the valve mouth portion (12), and the stopper (316) has a first convex portion (3162), which protrudes from the third main body portion (3161), and the first convex portion (3162) is at least partially located in the first groove.

9. The valve according to claim 8, characterized in that The screw assembly comprises a first cylinder (313), the first cylinder (313) is sleeved on the first rod (312), one end of the first cylinder (313) abuts against the inner wall of the sleeve (311), and the other end of the first cylinder (313) abuts against the first connecting portion (321).

10. The valve according to claim 9, characterized in that The screw assembly includes a second cylinder (314), which is sleeved on the first rod (312), one end of the second cylinder (314) abuts against the inner wall of the sleeve (311), and the other end of the second cylinder (314) abuts against the first connecting portion (321), the first cylinder (313) is located on one side of the first connecting portion (321), and the second cylinder (314) is located on the other side of the first connecting portion (321).

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