Valve core component of electric valve

Abstract

The invention discloses a valve element component of an electric valve. The valve element component comprises a valve element, a valve rod, an O-shaped ring, a sliding piece, a valve element spring, a limiting sleeve, a valve rod sleeve, a bearing sleeve, a bearing, a balance hole, a first mounting part, a second mounting part and a mounting boss. The limiting sleeve and the bearing sleeve are of a split structure and are connected and fixed through laser welding, and the connection strength is guaranteed; the limiting sleeve and the valve element are in inserted guide fit and are fixed through riveting or laser welding, and the connecting strength is guaranteed. In the actual use process, the valve element part reciprocates up and down for multiple times, connection is reliable through laser welding or riveting, the situation that the limiting sleeve and the valve element are loosened is avoided, and the durability of the electric valve is improved.

Description

Technical Field

[0001] This invention specifically relates to an electric valve core component. Background Technology

[0002] The electric valve is a throttling element in the refrigeration system, placed between the condenser and the evaporator. It reduces the pressure by throttling, converting the high-temperature, high-pressure liquid refrigerant at the condenser end into a low-temperature, low-pressure state before it enters the evaporator.

[0003] An electric valve includes a coil, a rotor assembly, a valve body, a valve seat assembly, a nut assembly, and a valve core assembly. When the coil is energized, it drives the rotor assembly to rotate, which in turn drives the valve stem, which is fixedly connected to the valve core assembly, to rotate. The external thread of the valve stem engages with the internal thread of the fixed nut assembly through a threaded pair, causing the valve stem to move up and down. The valve stem is movably connected to the valve core assembly, thereby realizing the up and down movement of the valve core. This allows for the adjustment of the throttling area between the valve core and the valve orifice, achieving precise control of the refrigerant flow.

[0004] In the existing technology patent number CN218718894 U, the limit sleeve and the valve core are connected by threads, which is prone to loosening and failure, thus affecting the use of the electric valve. Summary of the Invention

[0005] The purpose of this invention is to provide an electric valve core component to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an electric valve core component, comprising:

[0007] The valve core has a stepped mounting portion at one end and a receiving cavity at the end of the valve core near the stepped mounting portion, and a valve core spring is provided in the receiving cavity.

[0008] A limiting sleeve is fitted onto the stepped mounting part and is fixedly connected to the stepped mounting part.

[0009] Preferably, the stepped mounting part includes a first mounting part and a second mounting part arranged from top to bottom, and the limiting sleeve and the first mounting part are fixed by laser welding or riveting.

[0010] Preferably, the second mounting part is fitted with an O-ring, and the O-ring is fitted with a sliding piece.

[0011] Preferably, the device further includes a valve stem, which is disposed on the end of the valve core near the stepped mounting portion. A mounting boss is fixed on the side of the valve stem near the stepped mounting portion, and a valve stem sleeve is welded or riveted to the end of the valve stem near the mounting boss. A bearing is disposed between the mounting boss and the valve stem sleeve. The bearing is inserted and fixed to the valve stem, and one end face of the bearing is fixedly connected to the mounting boss, while the other end face is fixedly connected to the valve stem sleeve. A bearing sleeve is also fitted over the bearing. A first mounting cavity and a second mounting cavity are disposed inside the bearing sleeve from top to bottom. The bearing is snapped and fixed in the first mounting cavity, and the outer wall of the limiting sleeve is snapped and fixed to the second mounting cavity of the bearing sleeve.

[0012] Preferably, the bearing sleeve is further provided with a plurality of balance holes, which are in communication with the receiving cavity.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] This application utilizes a separate structure for the limiting sleeve and bearing sleeve, which are then connected and fixed by laser welding to ensure connection strength. The limiting sleeve and valve core are inserted and guided, and fixed by riveting or laser welding to ensure connection strength. During actual use, the valve core component undergoes multiple up-and-down reciprocating movements. The reliable connection via laser welding or riveting prevents the limiting sleeve and valve core from loosening, thereby increasing the durability of the electric valve. Attached Figure Description

[0015] Figure 1 This is an overall schematic diagram of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of a portion of point A in the middle;

[0017] Figure 3 This is a schematic diagram of the stepped mounting portion of the valve core of the present invention;

[0018] In the diagram: 1. Valve core; 2. Valve stem; 3. O-ring; 4. Sliding plate; 5. Valve core spring; 6. Limit sleeve; 7. Valve stem sleeve; 8. Bearing sleeve; 9. Bearing; 10. Balance hole; 11. First mounting part; 12. Second mounting part; 13. Mounting boss. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-3The present invention provides a technical solution: an electric valve core component, comprising:

[0021] Valve core 1, one end of valve core 1 is provided with a stepped mounting part, and the end of valve core 1 near the stepped mounting part is also provided with a receiving cavity, and valve core spring 5 is provided in the receiving cavity.

[0022] Limiting sleeve 6 is fitted onto the step mounting part and is fixedly connected to the step mounting part.

[0023] In this embodiment, the stepped mounting part includes a first mounting part 11 and a second mounting part 12 arranged from top to bottom, and the limiting sleeve 6 and the first mounting part 11 are fixed by laser welding or riveting.

[0024] In this embodiment, the second mounting part 12 is covered with an O-ring 3, and the O-ring 3 is covered with a sliding piece 4.

[0025] In existing electronic expansion valve assemblies, the upper limit of the sliding sealing ring, composed of an O-ring 3 and a sliding plate 4, is achieved through riveting or welding. However, riveting can cause deformation of some valve core components, while welding can lead to sealing failure of some O-rings 3 or sliding plates 4 due to welding heat. In this application, the bottom wall of the limiting sleeve 6 abuts against the top of the O-ring 3 and the sliding plate 4, compressing and fixing them, thus avoiding the device failure caused by riveting or welding.

[0026] In this embodiment, a valve stem 2 is also included. The valve stem 2 is disposed on the end of the valve core 1 near the stepped mounting part. A mounting boss 13 is fixed on the side of the valve stem 2 near the stepped mounting part. A valve stem sleeve 7 is welded or riveted to the end of the valve stem 2 near the mounting boss 13. A bearing 9 is disposed between the mounting boss 13 and the valve stem sleeve 7. The bearing 9 is inserted and fixed to the valve stem 2. One end face of the bearing 9 is fixedly connected to the mounting boss 13, and the other end face is fixedly connected to the valve stem sleeve 7. A bearing sleeve 8 is also sleeved on the outside of the bearing 9. A first mounting cavity and a second mounting cavity are disposed inside the bearing sleeve 8 from top to bottom. The bearing 9 is snapped and fixed in the first mounting cavity. The outer wall of the limiting sleeve 6 is snapped and fixedly positioned with the second mounting cavity of the bearing sleeve 8, and the two are further fixed by welding or riveting.

[0027] This application uses a separate structure of limiting sleeve 6 and bearing sleeve 8, which are connected and fixed by laser welding to ensure connection strength; the limiting sleeve 6 and valve core 1 are inserted and guided, and fixed by riveting or laser welding to ensure connection strength; in actual use, the valve core 1 component moves up and down repeatedly, and the connection is reliable by laser welding or riveting to increase durability.

[0028] In this embodiment, the bearing sleeve 8 is also provided with several balance holes 10, which communicate with the receiving cavity. By balancing the pressure between the inside of the bearing cavity and the external environment, a series of problems caused by pressure difference are prevented.

[0029] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve core component for an electric valve, characterized in that, include: Valve core (1), one end of the valve core (1) is provided with a stepped mounting part, and the end of the valve core (1) near the stepped mounting part is also provided with a receiving cavity, and a valve core spring (5) is provided in the receiving cavity; A limiting sleeve (6) is fitted onto the stepped mounting part and is fixedly connected to the stepped mounting part.

2. The electric valve core component according to claim 1, characterized in that: The stepped mounting section includes a first mounting section (11) and a second mounting section (12) arranged from top to bottom. The limiting sleeve (6) and the first mounting section (11) are fixed by laser welding or riveting.

3. The electric valve core component according to claim 2, characterized in that: The second mounting part (12) is covered with an O-ring (3), and the O-ring (3) is covered with a sliding piece (4).

4. The electric valve core component according to claim 1, characterized in that: It also includes a valve stem (2), which is disposed on the end of the valve core (1) near the stepped mounting part. A mounting boss (13) is fixed on the side of the valve stem (2) near the stepped mounting part, and a valve stem sleeve (7) is welded or riveted to the end of the valve stem (2) near the mounting boss (13). A bearing (9) is disposed between the mounting boss (13) and the valve stem sleeve (7). The bearing (9) is inserted and fixed to the valve stem (2), and one end of the bearing (9) One end face is fixedly connected to the mounting boss (13), and the other end face is fixedly connected to the valve stem sleeve (7). The bearing (9) is also fitted with a bearing sleeve (8). The bearing sleeve (8) has a first mounting cavity and a second mounting cavity arranged from top to bottom. The bearing (9) is snapped and fixed in the first mounting cavity. The outer wall of the limiting sleeve (6) is snapped and fixed to the second mounting cavity of the bearing sleeve (8). One end of the valve core spring (5) abuts against the valve core (1), and the other end abuts against the bottom end of the bearing (9).

5. The electric valve core component according to claim 4, characterized in that: The bearing sleeve (8) is also provided with several balance holes (10), which are connected to the receiving cavity.

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