CN210661552U - Valve seat assembly of electronic expansion valve - Google Patents

Abstract

A valve seat assembly of an electronic expansion valve comprises a hollow valve seat and a valve rod with external threads, connecting pipes are welded to the lower end and the side face of the valve seat respectively, connecting pieces embedded through injection molding are arranged on the valve rod, the connecting pieces are installed on the valve seat in an interference fit mode, and the connecting pieces are connected in a reinforcing mode through laser welding, so that the connecting strength is better and more stable. Because the valve rod adopts independent injection moulding's mode, valve rod and disk seat are as independent general part for die sinking, processing and shaping are easier, and manufacturing cost also correspondingly reduces, has increased the general piece quantity of finished product simultaneously, and the better management and control of quality makes batchization, standardized production easier.

Description

Valve seat assembly of electronic expansion valve

Technical Field

The utility model relates to an electronic expansion valve especially indicates the electronic expansion valve disk seat subassembly of the flow of control fluid.

Background

The electronic expansion valve is widely applied to throttling and pressure reduction and flow regulation of fluid, and utilizes the current in a coil of the electronic expansion valve to generate electromagnetic driving force to drive a magnetic rotor of a main valve body to rotate, so as to drive a valve needle to move up and down to change the flow area of a valve port, and further achieve the purpose of automatic flow regulation.

The valve seat of the electronic expansion valve is an important part of the electronic expansion valve, and the quality of the manufactured valve seat directly affects the failure rate and the service life of the electronic expansion valve, so that how to produce the valve seat which has the advantages of guaranteed quality, low cost and easy batch production is a problem that each manufacturer must solve.

The production of present electronic expansion valve disk seat generally adopts integral type injection moulding, and the advantage of this production mode is integrated into one piece, reduces middle assembly, step such as connection, but this mode also has the die sinking difficulty, and the mould is with high costs, and the difficult processing of burr after the drawing of patterns, to the high scheduling problem of production facility requirement, simultaneously because inside deckle edge, burr are difficult to be cleared up, the needle is worn and torn easily in the motion process to cause the not accurate of electronic valve control, the not enough scheduling problem of life. To the problem that integrated into one piece faced, the utility model discloses a split type injection moulding mode divide into two parts of valve rod and disk seat to the disk seat, carries out machine-shaping respectively, then couples together this processed part to make whole disk seat. Adopt split type injection moulding's mode, not only can solve inside deckle edge, burr scheduling problem, its die sinking is also simple simultaneously, and valve rod and disk seat can regard as general part respectively, the production of the standardization of being convenient for, batchization.

Disclosure of Invention

The utility model aims at providing an electronic expansion valve disk seat of split type machine-shaping in view of electronic expansion valve disk seat integrated into one piece's technical defect, this split type electronic expansion valve disk seat has the quality height and stable, and flow control is even steady and be convenient for advantages such as standardization, mass production.

In order to solve the technical problem existing in the above, the utility model discloses a technical scheme as follows:

a valve seat assembly of an electronic expansion valve comprises a hollow valve seat and a valve rod with external threads, wherein connecting pipes are welded at the lower end and the side surface of the valve seat; the valve rod on be equipped with through moulding plastics the inlayed connection piece, the connection piece passes through interference fit with the disk seat and installs on the disk seat to consolidate through laser welding's mode and be connected, make it joint strength better and more stable. The side of the top of the valve rod is provided with two staggered bosses, the bottom of the valve rod is provided with a base station, the side surface of the base station is provided with a plurality of through holes, and the mode of multiple through holes is adopted, so that the flow control is more uniform and stable. The inside cavity that is of whole valve rod, whole valve rod passes through the connection piece and is connected with the disk seat.

Compared with the prior art, the utility model has the advantages that the valve seat and the valve rod are separately injection-molded due to the split molding, the die sinking is simpler, the die cost is lower, the valve seat and the valve rod can be made into universal parts, the batch and standardized production is facilitated, and the product quality is easier to control. Simultaneously for integrated into one piece's production mode, there is not deckle edge dead angle, consequently the product quality can be higher.

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Drawings

FIG. 1 is a general cross-sectional view of an embodiment of the present invention;

1. the valve comprises a valve rod, a valve seat, an air inlet pipe, an air outlet pipe, a connecting sheet, a base table, a boss and a valve core, wherein the valve rod is 2, the valve seat is 3, the air inlet pipe is 4, the air outlet pipe is 5, the connecting sheet is 6, the boss is 7, and the valve core is 11;

FIG. 2 is a schematic view of a valve stem according to an embodiment of the present invention;

5. the connecting piece comprises a base table 6, a boss 7, a through hole 8, an external thread 9 and a balance hole 10;

FIG. 3 is a schematic view of a valve seat according to an embodiment of the present invention;

2. a valve seat, 3. an air inlet pipe, 4. an air outlet pipe;

fig. 4 is a general schematic diagram of an embodiment of the present invention;

1. the valve rod, 2 valve seats, 3 air inlet pipes, 4 air outlet pipes and 5 connecting pieces.

Detailed Description

The utility model relates to a valve seat component of an electronic expansion valve, as shown in figures 1 to 4, comprising a hollow valve seat 2 and a valve rod 1 with external screw threads 9, wherein the lower end of the valve seat 2 is welded with a first connecting pipe 4, and the side end is welded with a second connecting pipe 3; the valve rod 1 on be equipped with through moulding plastics inlayed connection piece 5, connection piece 5 installs on disk seat 2 through interference fit to consolidate the connection through laser welding's mode, make valve rod 1 and disk seat 2 even as an organic whole. The valve rod 1, its top is equipped with two bosses 7 that stagger mutually, and peripheral first half is equipped with external screw thread 9, and its lower half is base station 6, and connection piece 5 moulds plastics in 6 upper ends of base station, and 6 side openings of base station have through-hole 8, and base station 6 inlays on case 11 through bottom assembly through-hole, and case 11 welds on 4 outlet ducts, through the effect of the cavity of valve rod 1 inside and through-hole, combines the regulation of needle to realize the through-flow and the accuse of the fluidic simultaneously and flow.

The utility model discloses an adopt separately injection moulding's mode with disk seat 2 and valve rod 1, utilize connection piece 5 on the valve rod 1 and disk seat 2's interference fit and laser welding's mode to carry out the reinforced (rfd) and be connected, realize valve rod 1 and disk seat 2's an organic whole connection. The split production mode is beneficial to mold opening, reduces mold opening cost, enables the mold opening to be easier to be made into standard parts, enables production quality to be easier to control, and is easier to produce in batches; on the other hand, if disk seat 2 and valve rod 1 adopt integrated into one piece's production mode, its mould structure is more complicated, is unfavorable for the die sinking, and the production facility requirement is also high, and more importantly its post mould comes out an integrative form, and corner burr, deckle edge are difficult to handle, and burr, deckle edge in its inside cavity are more difficult to handle, and have the deckle edge dead angle, just so must cause the unstability of product quality to influence whole electronic expansion valve's performance and life-span.

Claims (1)

1. An electronic expansion valve seat assembly, characterized by: the valve comprises a valve seat (2) and a valve rod (1), wherein an air outlet pipe (4) and an air inlet pipe (3) are respectively welded at the lower end and the side surface of the valve seat (2); the valve comprises a valve rod (1), a connecting piece (5) embedded by injection molding is arranged on the valve rod (1), external threads (9) are arranged on the periphery of the valve rod (1), staggered bosses (7) are arranged at the upper end of the valve rod (1), a base station (6) is arranged at the lower end of the valve rod (1), the base station (6) is embedded on a valve core (11) through a bottom assembling through hole, a through hole (8) is arranged on the side surface of the base station (6), and a cavity is formed inside the valve rod; the connecting sheet (5) is embedded on a base platform (6) at the lower end of the valve rod (1); the connecting piece (5) is arranged on the valve seat (2) in an interference fit manner, and the connecting piece (5) and the valve seat (2) are connected into a whole in a laser welding manner; the connecting piece (5) is provided with a balance hole (10).

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