Electronic expansion valve assembly

Abstract

The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve assembly which is characterized in that liquid flows through a valve body, then a driving mechanism drives an adjusting mechanism to move upwards or downwards to control the flow in the valve body after receiving a signal, and meanwhile, the lifting range of the adjusting mechanism is limited through a stop mechanism; the practicability of the electronic expansion valve is improved; comprising a driving mechanism; the valve further comprises a valve body, an adjusting mechanism and a stop mechanism, the adjusting mechanism and the driving mechanism are both installed on the valve body, and the stop mechanism is installed on the adjusting mechanism. The driving mechanism provides power for the adjusting mechanism, the flow in the valve body is adjusted by the improving mechanism, and the lifting range of the adjusting mechanism is limited by the stopping mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve assembly. Background Art

[0002] An electronic expansion valve is a device for controlling the flow of refrigerant, and is typically used in refrigeration and air-conditioning systems. Existing electronic expansion valves, such as the electronic expansion valve disclosed in the invention patent with publication number CN113719616A and the electronic expansion valve disclosed in the utility model patent with publication number CN203785342U, can all achieve flow regulation.

[0003] However, it was found during use that the existing electronic expansion valve has poor lifting stability, many parts, and complicated installation steps, which affects production efficiency and leads to poor practicality. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides an electronic expansion valve assembly in which liquid flows through a valve body, and then a driving mechanism drives an adjusting mechanism to move upward or downward after receiving a signal, thereby controlling the flow in the valve body, and at the same time limiting the lifting range of the adjusting mechanism through a stop mechanism, thereby improving the practicality of the electronic expansion valve.

[0005] The utility model discloses an electronic expansion valve assembly, comprising a driving mechanism, a valve body, an adjusting mechanism and a stopping mechanism, wherein the adjusting mechanism and the driving mechanism are both mounted on the valve body, and the stopping mechanism is mounted on the adjusting mechanism;

[0006] The driving mechanism provides power for the regulating mechanism, the lifting structure regulates the flow in the valve body, and the stop mechanism limits the lifting range of the regulating mechanism;

[0007] The liquid flows through the valve body, and then the driving mechanism receives a signal to drive the regulating mechanism to move upward or downward to control the flow in the valve body. At the same time, the lifting range of the regulating mechanism is limited by the stop mechanism, thereby improving the practicality of the electronic expansion valve.

[0008] Preferably, the driving mechanism includes a stator assembly, a magnetic isolation tube, a magnetic rotor and a fixed plate, the stator assembly is mounted on the valve body, the magnetic isolation tube is mounted inside the stator assembly, the magnetic rotor is mounted on the adjusting mechanism through the fixed plate, and the magnetic rotor is located inside the magnetic isolation tube; after the stator assembly receives the signal, the stator assembly generates a magnetic field to drive the magnetic rotor to rotate, which is transmitted through the fixed plate to cause the adjusting mechanism to rotate and make an upward or downward movement in the valve body, thereby improving the convenience of adjusting the flow in the valve body.

[0009] Preferably, the adjusting mechanism includes a screw, a valve needle sleeve, a bushing, a valve needle and a valve needle spring, the top of the screw is inserted in the fixed plate, and the fixed plate and the screw are welded, the surface of the screw is threadedly connected to the valve body, the valve needle sleeve is sleeved on the screw, the bushing is interference sleeved on the screw, and the bushing and the screw are welded, the valve needle spring is installed inside the valve needle, the bottom end of the screw is inserted in the valve needle, and the outer surface of the valve needle sleeve is welded to the valve needle; the screw is driven to rotate by the magnetic rotor, and the valve needle is moved up or down through the threaded transmission of the screw and the valve body to adjust the flow in the valve body, and when the valve needle closes the valve port, the elasticity of the valve needle spring is used to improve the sealing effect of the valve needle, thereby improving the popularity of the electronic expansion valve when adjusting the flow, and improving the sealing effect of the electronic expansion valve after it is fully closed.

[0010] Preferably, the valve body includes a valve seat, a valve base, a first sealing ring, a nut assembly and a gasket, the first sealing ring and the gasket are both installed at the top inside the valve base, and the gasket and the valve base are welded, the top of the valve base and the bottom of the valve seat are interference fit, and the valve base and the valve seat are welded, the bottom of the nut assembly is interference fit into the top of the valve seat, and the nut assembly and the valve seat are riveted, and the surface of the screw is threadedly connected to the inner wall of the nut assembly; the liquid flows through the valve base, guides the screw through the nut assembly, and guides the valve needle through the valve seat and the valve base, so that the valve adjusts the flow rate in the valve base, thereby improving the stability of the electronic expansion valve.

[0011] Preferably, the stopping mechanism comprises a stopping rod, a spring guide and a slip ring, the stopping rod is welded to the fixing plate, the spring guide and the slip ring are both mounted on the nut assembly, the top of the spring guide and the bottom of the nut assembly are both provided with limiting points, and the spring guide performs a spiral guide on the slip ring; the fixing plate rotates following the magnetic rotor, and at the same time the stopping rod drives the slip ring to perform a spiral ascending or descending motion along the spring guide, when the slip ring rises to the top of the spring guide, the limiting point at the top of the slip ring is used to limit the slip ring, so that the magnetic rotor stops rotating, when the slip ring descends to the bottom of the nut assembly, the limiting point at the bottom of the nut assembly is used to limit the slip ring, so that the magnetic rotor stops rotating, and the lifting stroke of the valve needle is limited, thereby improving the stability of the closing and opening of the valve needle.

[0012] Preferably, a second sealing ring and a third sealing ring are also included, and the outer surfaces of the valve seat and the valve base are provided with limiting grooves, and the second sealing ring and the third sealing ring are respectively inserted into the limiting grooves of the valve seat and the valve base; when the valve seat and the valve base are connected to the pipeline, the second sealing ring and the third sealing ring are used to seal the gap between the valve seat and the valve base and the pipeline, thereby improving the sealing effect of the electronic expansion valve.

[0013] Preferably, an auxiliary spring is also included, wherein a first step is provided on the valve needle, a second step is provided in the valve seat, the auxiliary spring is sleeved on the valve needle, and the bottom end of the auxiliary spring contacts the valve needle step, and the top end of the auxiliary spring contacts the internal step of the valve seat; through the elasticity of the auxiliary spring, it is convenient for the valve needle to seal the interior of the valve base, thereby improving the sealing effect of the valve needle on the valve base and reducing the burden on the magnetic rotor.

[0014] Preferably, the valve needle, valve seat and nut assembly are provided with vent holes, a first vent hole is provided on the top of the valve needle, at least one second vent hole is provided on the side of the valve needle, and the first vent hole is connected to the second vent hole; a plurality of vent holes are provided inside the valve seat, and a plurality of vent holes are provided on the side wall of the nut assembly. When the valve opens the valve port under high pressure, the high pressure enters the valve seat after entering the first and second vent holes of the valve needle, and then enters the nut assembly through the valve seat vent hole, and finally enters the magnetic isolation tube through the vent hole of the nut assembly, which can quickly balance the air pressure between the port and the valve body, and can reduce the sealing force required when the valve needle is closed, thereby achieving the purpose of reducing costs.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The screw is guided by the nut assembly, and the valve needle is guided by the valve seat and valve base to improve the stability of the valve needle in the up and down movement;

[0017] 2. The first sealing ring in the valve base cooperates with the valve needle to block the fluid and prevent the fluid from entering the interior of the valve body;

[0018] 3. The valve needle spring is installed in the valve needle, which effectively reduces the impact force of the valve needle on the sealing surface of the valve base when closing the valve, plays a buffering role and increases the service life of the product;

[0019] 4. The valve needle and the screw are decoupled by the valve needle sleeve and the bushing, which improves the flexibility and adjustability of the flow control mechanism and improves the stability and durability of the equipment;

[0020] 5. The valve needle, valve base and nut assembly are all provided with through holes. When the valve needle is opened, the pressure at the valve inlet can be quickly balanced with the pressure inside the valve.

[0021] 6. Use interference installation method to improve the stability of the electronic expansion valve;

[0022] 7. The structure has high integration, few parts, few welding parts, easy assembly, lightweight and cost reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the axonometric structure of the utility model;

[0024] Figure 2 It is an axonometric enlarged structural diagram of the drive mechanism and valve body of the utility model;

[0025] Figure 3 It is a front view cross-sectional enlarged structural schematic diagram of the drive mechanism and valve body of the utility model;

[0026] Figure 4 It is a schematic diagram of the exploded structure of the drive mechanism and valve body of the utility model;

[0027] Figure 5 It is a front view cross-sectional enlarged structural schematic diagram of the adjustment mechanism of the utility model;

[0028] Figure 6 It is a front view cross-sectional enlarged structural schematic diagram of the magnetic rotor and the stop rod and other structures of the utility model;

[0029] Figure 7 It is a front view cross-sectional enlarged structural schematic diagram of the valve seat and valve base structure of the utility model.

[0030] Markings in the accompanying drawings: 1. stator assembly; 2. magnetic isolation tube; 3. magnetic rotor; 4. fixed plate; 5. screw; 6. valve needle sleeve; 7. bushing; 8. valve needle; 9. valve needle spring; 10. valve seat; 11. valve base; 12. first sealing ring; 13. nut assembly; 14. stop rod; 15. spring guide; 16. slip ring; 17. second sealing ring; 18. third sealing ring; 19. auxiliary spring; 20. gasket. DETAILED DESCRIPTION

[0031] In order to facilitate the understanding of the utility model, the utility model will be described more comprehensively below with reference to the relevant drawings. The utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0032] Example 1

[0033] An electronic expansion valve assembly includes a driving mechanism; a valve body, an adjusting mechanism and a stopping mechanism, wherein the adjusting mechanism and the driving mechanism are both mounted on the valve body, and the stopping mechanism is mounted on the adjusting mechanism;

[0034] The driving mechanism provides power for the regulating mechanism, the lifting structure regulates the flow in the valve body, and the stop mechanism limits the lifting range of the regulating mechanism;

[0035] The driving mechanism comprises a stator assembly 1, a magnetic isolation tube 2, a magnetic rotor 3 and a fixing plate 4, wherein the stator assembly 1 is mounted on the valve body, the magnetic isolation tube 2 is mounted inside the stator assembly 1, the magnetic rotor 3 is mounted on the adjustment mechanism through the fixing plate 4, and the magnetic rotor 3 is located inside the magnetic isolation tube 2;

[0036] The regulating mechanism comprises a screw rod 5, a valve needle sleeve 6, a bushing 7, a valve needle 8 and a valve needle spring 9. The top of the screw rod 5 is over-installed in the fixing plate 4, and the fixing plate 4 and the screw rod 5 are welded. The surface of the screw rod 5 is threadedly connected with the valve body. The valve needle sleeve 6 is sleeved on the screw rod 5, and the bushing 7 is interference-fitted on the screw rod 5, and the bushing 7 and the screw rod 5 are welded. The valve needle spring 9 is installed inside the valve needle 8, and the bottom end of the screw rod 5 is inserted into the valve needle 8, and the outer surface of the valve needle sleeve 6 is welded to the valve needle 8.

[0037] The valve body includes a valve seat 10, a valve base 11, a first sealing ring 12, a nut assembly 13 and a gasket 20. The first sealing ring 12 and the gasket 20 are both installed at the top of the valve base 11, and the gasket 20 and the valve base 11 are welded. The top of the valve base 11 and the bottom of the valve seat 10 are inserted by interference, and the valve base 11 and the valve seat 10 are welded. The bottom of the nut assembly 13 is inserted by interference at the top of the valve seat 10, and the nut assembly 13 and the valve seat 10 are riveted. The surface of the screw 5 is threadedly connected with the inner wall of the nut assembly 13.

[0038] The stop mechanism includes a stop rod 14, a spring guide rail 15 and a slip ring 16. The stop rod 14 is welded to the fixing plate 4. The spring guide rail 15 and the slip ring 16 are both mounted on the nut assembly 13. The top of the spring guide rail 15 and the bottom of the nut assembly 13 are both provided with limited positions, and the spring guide rail 15 performs spiral guidance on the slip ring 16.

[0039] It also includes an auxiliary spring 19, the valve needle 8 is provided with a first step, the valve seat is provided with a second step, the auxiliary spring 19 is sleeved on the valve needle 8, and the bottom end of the auxiliary spring 19 contacts the step of the valve needle 8, and the top end of the auxiliary spring 19 contacts the inner step of the valve seat 10;

[0040] The liquid flows through the valve seat 11. After the stator assembly 1 receives the signal, the stator assembly 1 drives the magnetic rotor 3 to rotate, which is then transmitted through the fixed plate 4 to rotate the screw 5. The screw 5 is threadedly transmitted with the valve body, and the screw 5 is guided by the nut assembly 13. The valve needle 8 is guided by the valve seat 10 and the valve seat 11 to move the valve needle 8 upward or downward to adjust the flow in the valve seat 11. When the valve needle 8 completely closes the inside of the valve body, the elasticity of the valve needle spring 9 and the auxiliary spring 19 is used to increase the valve pressure. The sealing effect of the needle 8 is improved, and when the magnetic rotor 3 rotates, the stop rod 14 drives the slip ring 16 to perform a spiral upward or spiral downward motion along the spring guide rail 15. When the slip ring 16 rises to the top of the spring guide rail 15, the slip ring 16 is restricted by the limit point at the top of the slip ring 16, so that the rotation of the magnetic rotor 3 is stopped. When the slip ring 16 descends to the bottom of the nut assembly 13, the slip ring 16 is restricted by the limit point at the bottom of the nut assembly 13, so that the rotation of the magnetic rotor 3 is stopped, thereby improving the practicality of the electronic expansion valve.

[0041] Example 2

[0042] like Figures 1 to 7 As shown, an electronic expansion valve assembly includes a driving mechanism; a valve body, an adjusting mechanism and a stopping mechanism. The adjusting mechanism and the driving mechanism are both mounted on the valve body, and the stopping mechanism is mounted on the adjusting mechanism;

[0043] The driving mechanism provides power for the regulating mechanism, the lifting structure regulates the flow in the valve body, and the stop mechanism limits the lifting range of the regulating mechanism;

[0044] The driving mechanism comprises a stator assembly 1, a magnetic isolation tube 2, a magnetic rotor 3 and a fixing plate 4, wherein the stator assembly 1 is mounted on the valve body, the magnetic isolation tube 2 is mounted inside the stator assembly 1, the magnetic rotor 3 is mounted on the adjustment mechanism through the fixing plate 4, and the magnetic rotor 3 is located inside the magnetic isolation tube 2;

[0045] The regulating mechanism comprises a screw rod 5, a valve needle sleeve 6, a bushing 7, a valve needle 8 and a valve needle spring 9. The top of the screw rod 5 is inserted into the fixing plate 4, and the fixing plate 4 and the screw rod 5 are welded. The surface of the screw rod 5 is threadedly connected with the valve body. The valve needle sleeve 6 is sleeved on the screw rod 5, and the bushing 7 is interference sleeved on the screw rod 5, and the bushing 7 and the screw rod 5 are welded. The valve needle spring 9 is installed inside the valve needle 8, and the bottom end of the screw rod 5 is inserted into the valve needle 8, and the outer surface of the valve needle sleeve 6 is welded to the valve needle 8.

[0046] The valve body includes a valve seat 10, a valve base 11, a first sealing ring 12, a nut assembly 13 and a gasket 20. The first sealing ring 12 and the gasket 20 are both installed at the top of the valve base 11, and the gasket 20 and the valve base 11 are welded. The top of the valve base 11 and the bottom of the valve seat 10 are inserted by interference, and the valve base 11 and the valve seat 10 are welded. The bottom of the nut assembly 13 is inserted by interference at the top of the valve seat 10, and the nut assembly 13 and the valve seat 10 are riveted. The surface of the screw 5 is threadedly connected with the inner wall of the nut assembly 13.

[0047] The stop mechanism includes a stop rod 14, a spring guide rail 15 and a slip ring 16. The stop rod 14 is welded to the fixing plate 4. The spring guide rail 15 and the slip ring 16 are both mounted on the nut assembly 13. The top of the spring guide rail 15 and the bottom of the nut assembly 13 are both provided with limited positions, and the spring guide rail 15 performs spiral guidance on the slip ring 16.

[0048] It also includes a second sealing ring 17 and a third sealing ring 18. The outer surfaces of the valve seat 10 and the valve base 11 are both provided with limiting grooves, and the second sealing ring 17 and the third sealing ring 18 are respectively mounted in the limiting grooves of the valve seat 10 and the valve base 11;

[0049] It also includes an auxiliary spring 19, the valve needle 8 is provided with a first step, the valve seat is provided with a second step, the auxiliary spring 19 is sleeved on the valve needle 8, and the bottom end of the auxiliary spring 19 contacts the step of the valve needle 8, and the top end of the auxiliary spring 19 contacts the inner step of the valve seat 10;

[0050] The valve needle 8, valve seat 10 and nut assembly 13 are provided with a plurality of vent holes, and the three are interconnected.

[0051] When the valve seat 10 and the valve base 11 are connected to the pipeline, the gap between the valve seat 10 and the valve base 11 and the pipeline is sealed by the second sealing ring 17 and the third sealing ring 18. The liquid flows through the valve base 11. After the stator assembly 1 receives the signal, the stator assembly 1 drives the magnetic rotor 3 to rotate, which is transmitted through the fixed plate 4 to rotate the screw 5. The screw 5 and the valve body are threadedly transmitted, and the screw 5 is guided by the nut assembly 13. The valve needle 8 is guided by the valve seat 10 and the valve base 11 to move the valve needle 8 upward or downward, so as to adjust the flow in the valve base 11, and when the valve needle 8 moves the valve body When the interior of the electronic expansion valve is completely closed, the elasticity of the valve needle spring 9 and the auxiliary spring 19 improves the sealing effect of the valve needle 8, and when the magnetic rotor 3 rotates, the stop rod 14 drives the slip ring 16 to perform a spiral upward or spiral downward movement along the spring guide rail 15. When the slip ring 16 rises to the top of the spring guide rail 15, the slip ring 16 is restricted by the limit point at the top of the slip ring 16, so that the rotation of the magnetic rotor 3 is stopped. When the slip ring 16 descends to the bottom of the nut assembly 13, the slip ring 16 is restricted by the limit point at the bottom of the nut assembly 13, so that the rotation of the magnetic rotor 3 is stopped, thereby improving the practicability of the electronic expansion valve.

[0052] The stator component 1, the magnetic isolation tube 2 and the magnetic rotor 3 of the electronic expansion valve assembly of the utility model are purchased on the market, and technicians in the industry only need to install and operate them according to the accompanying instruction manual without the need for creative work by technicians in this field.

[0053] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principle of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electronic expansion valve assembly, comprising a driving mechanism; characterized in that: It also includes a valve body, an adjusting mechanism and a stop mechanism, wherein the adjusting mechanism and the driving mechanism are both installed on the valve body, and the stop mechanism is installed on the adjusting mechanism; The driving mechanism provides power for the regulating mechanism, the lifting structure regulates the flow in the valve body, and the stop mechanism limits the lifting range of the regulating mechanism.

2. An electronic expansion valve assembly as claimed in claim 1, characterized in that: The driving mechanism comprises a stator assembly (1), a magnetic isolation tube (2), a magnetic rotor (3) and a fixing plate (4); the stator assembly (1) is mounted on a valve body, the magnetic isolation tube (2) is mounted inside the stator assembly (1), the magnetic rotor (3) is mounted on the adjustment mechanism via the fixing plate (4), and the magnetic rotor (3) is located inside the magnetic isolation tube (2).

3. An electronic expansion valve assembly as claimed in claim 2, characterized in that: The regulating mechanism comprises a screw rod (5), a valve needle sleeve (6), a bushing (7), a valve needle (8) and a valve needle spring (9); the top of the screw rod (5) is inserted into the fixing plate (4), and the fixing plate (4) and the screw rod (5) are welded; the surface of the screw rod (5) is threadedly connected to the valve body; the valve needle sleeve (6) is sleeved on the screw rod (5), the bushing (7) is interference-fitted on the screw rod (5), and the bushing (7) and the screw rod (5) are welded; the valve needle spring (9) is installed inside the valve needle (8); the bottom end of the screw rod (5) is inserted into the valve needle (8), and the outer surface of the valve needle sleeve (6) is welded to the valve needle (8).

4. An electronic expansion valve assembly as claimed in claim 3, characterized in that: The valve body comprises a valve seat (10), a valve base (11), a first sealing ring (12), a nut assembly (13) and a gasket (20); the first sealing ring (12) and the gasket (20) are both installed at the top of the valve base (11), and the gasket (20) and the valve base (11) are welded; the top of the valve base (11) and the bottom of the valve seat (10) are interference-fitted, and the valve base (11) and the valve seat (10) are welded; the bottom of the nut assembly (13) is interference-fitted on the top of the valve seat (10), and the nut assembly (13) and the valve seat (10) are riveted; the surface of the screw rod (5) is threadedly connected to the inner wall of the nut assembly (13).

5. An electronic expansion valve assembly as claimed in claim 2, characterized in that: The stop mechanism comprises a stop rod (14), a spring guide rail (15) and a slip ring (16); the stop rod (14) is welded to a fixed plate (4); the spring guide rail (15) and the slip ring (16) are both mounted on a nut assembly (13); a limited position is provided at the top of the spring guide rail (15) and the bottom of the nut assembly (13); and the spring guide rail (15) performs spiral guidance on the slip ring (16).

6. An electronic expansion valve assembly as claimed in claim 4, characterized in that: It also includes a second sealing ring (17) and a third sealing ring (18), the outer surfaces of the valve seat (10) and the valve base (11) are both provided with limiting grooves, and the second sealing ring (17) and the third sealing ring (18) are respectively mounted in the limiting grooves of the valve seat (10) and the valve base (11).

7. An electronic expansion valve assembly as claimed in claim 4, characterized in that: It also includes an auxiliary spring (19), wherein a first step is provided on the valve needle (8), a second step is provided in the valve seat, the auxiliary spring (19) is mounted on the valve needle (8), and the bottom end of the auxiliary spring (19) contacts the step of the valve needle (8), and the top end of the auxiliary spring (19) contacts the internal step of the valve seat (10).

8. An electronic expansion valve assembly as claimed in claim 4, characterized in that: The valve needle (8), the valve seat (10) and the nut assembly (13) are provided with a plurality of vent holes, and the three are interconnected.

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