Cone-shaped C-shaped single-valve-plate-type electric four-way valve

Abstract

The invention relates to a cone-shaped C-shaped single-valve-plate-type electric four-way valve. The electric four-way valve comprises a conical cylindrical valve seat, four liquid passing pipes whichare perpendicular to one another are arranged on the valve seat in the same horizontal plane in an outward extending mode, flanges used for sealing are arranged at the upper end and the lower end ofthe valve seat, a valve element and a valve element shaft connected with the valve element are arranged in the inner cavity of the valve seat, the upper end and the lower end of the valve element shaft penetrate through the centers of the flanges, the upper end of the valve element shaft is connected with a transmission control mechanism for controlling the valve element shaft to move up and downand rotate, the valve element is provided with a C-shaped liquid passing port, a vertical clamping groove is formed in the side, opposite to the side where the C-shaped liquid passing port is located,of the valve element, a clamping block matched with the clamping groove is arranged on the valve element shaft, the clamping block is movably inserted into the clamping groove, and a valve element fixing piece is arranged at the position, at the upper end of the clamping groove, on the valve element. Compared with the prior art, the electric four-way valve has the characteristics that the pressure in the valve body is balanced, the valve element forward moves in a taper mode for extruding sealing, and draws back for separating, the loss is small, the replacement of the whole valve plate is convenient and fast, and the later maintenance is convenient.

Description

technical field [0001] The invention relates to a four-way valve device, in particular to a cone-shaped C-shaped single valve plate electric four-way valve. Background technique [0002] The two-way volume tube adopts an electric four-way switching valve (general valve), so that the electric actuator drives the mechanical screw mechanism, so that the valve shaft can be lifted, and the two separated semi-cylindrical valve pieces are driven to shrink inwardly, and rotate horizontally on the spot after the switch is in place. , The valve shaft is downward to make the valve plate expand outward (the solid valve plate is processed with a sloped dovetail groove structure) and the cylinder wall is combined to play a sealing role. There are two deficiencies in this principle: one is that the inner shrinkage relies on the gap of about 2 to 3mm with the inner cylinder wall to discharge the liquid, and it is easy to cause the steering torque to increase during the switching process of ...

AI Technical Summary

Problems solved by technology

There are two deficiencies in this principle: one is that the inner shrinkage relies on the gap of about 2 to 3mm with the inner cylinder wall to discharge the liquid, and it is easy to cause the steering torque to increase during the switching process of large flow, and the momentary flow failure occurs. Pressurization phenomenon, causing liquid shock and vibration of equipment

[0003] Chinese patent CN101245863A discloses a conical Z-shaped spool type electric four-way valve, which is characterized in that a thick-walled, inner cavity is below the conical cylindrical valve seat, and mutually perpendicular Four liquid pipes, the center of the flange passes through the main shaft with the screw rod on the upper part, the main shaft passes through the Z-shaped valve core placed in the cone cavity, the indexing circle, and the two backstops protrude downwards and are fixed on the partition The main gear has an internal thread meshing with the main shaft screw; the main shaft is fastened to the Z-shaped valve core and the indexing circle; the indexing circle extends a lever outwards, facing the limit switch; the main gear passes through the transition gear set, Meshing with the motor output shaft gear, the conical Z-shaped spool type electric four-way valve is lifted and turned by the explosion-proof motor directly through the reduction gear mechanism and the tapered Z-shaped spool, and the motor is reversed to make a downward taper groove when it is in place. The two T-shaped sealing rings in the middle are combined with the inner wall of the valve seat with the same taper to complete the sealing. The unique large-lift technology is used to switch the upper end of the four-way port to reduce the torque and eliminate the impact phenomenon when the flow is cut. However, there is still a seal in practice. Due to the principle of friction, the ring is easily damaged, and the amount of maintenance is increased.

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