CN2481924Y

CN2481924Y - Double half-round valve core four-way change valve

Info

Publication number: CN2481924Y
Application number: CN 01225992
Authority: CN
Inventors: 董国成; 石云山
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-05
Filing date: 2001-06-05
Publication date: 2002-03-13
Anticipated expiration: 2011-06-05

Abstract

The utility model relates to a double semicircular valve core four-way reversing valve. The structure is that two semicircular valve cores form a complete valve core. The semicircular valve cores rotate under the driving of a double involute cam and an upper sliding plate, and simultaneously make the centripetal or centrifugal movement, therefore realizing the reversing process of the four-way reversing valve. The utility model has the advantages of novel structure, good sealing property, without wearing, leakage and pollution, long service life, safety and reliability, thus belonging to an economic and practical novel double semicircular valve core four-way reversing valve.

Description

Two semicircle spool four-way change-over valves

Described in the utility model pair of semicircle spool four-way change-over valve is a kind of capital equipment that standard pipe prover detects flowermeter that is used for, and also can be used in the general hydraulic pressure changement.

Along with science and technology development, the detection technique of measurement instrument is also being upgraded day by day.In the detection device to flowmeter, four-way change-over valve then is a visual plant.Existing four-way change-over valve has two kinds, and a kind of is hydraulic type, is made up of oil hydraulic pump, oil hydraulic cylinder etc.This four-way change-over valve equipment complexity, and sealing is poor, easy oil leakage.Also having a kind of is the electrodynamic type four-way change-over valve, is made up of institutes such as motor, retarder, spools.Though this four-way change-over valve is relatively good, but there are some problems.Most importantly spool and valve body are conical.Its working procedure is earlier conical spool upwards to be mentioned, and rotates then afterburningly again behind an angle of 90 degrees to insert downwards, and cone is coincide, and reaches the commutation seal action.The spool of this structure has relative friction and Extrusion process owing to be coniform during sealing, cause the damage of seal ring easily, and sealing effect is bad, makes testing result inaccurate.At existing problem in the prior art, a kind of novel four-way change-over valve of research and design, existing problem is very necessary in the prior art thereby overcome.

In view of existing problem in the above-mentioned prior art, the purpose of this utility model is a kind of novel structure of research and design, and easy to operate, good seal performance, nothing leak, pollution-free, safe and reliable two semicircle spool four-way change-over valves.The utility model adopts two semicircle spools, is commutated by the double involute cam driven.Accurate positioning does not have wearing and tearing, long service life, uses applicable to various different places and working environment, so the utility model is a kind of novel pair of economical and practical semicircle spool four-way change-over valve.

Described in the utility model pair of semicircle spool four-way change-over valve; It is characterized in that forming a spool by two semicircle spools; The semicircle spool moves by cam driven; The semicircle spool is slidably connected to upper slide; Cam is to slow down the back by main shaft drive rotation by motor by speed reducer; Position-sensing switch positions by the positioning hole on the upper slide.Cam described in the utility model is made up of upper and lower two double involute cams.The semicircle spool outside is made circular-arc, and dentation is made in the inboard.

The utility model provides a kind of novel four-way change-over valve.Thereby problems such as existing easy to wear, the easy oil leakage of the four-way change-over valve of using in the prior art, equipment complexity, poor performance have been overcome.Owing to adopted two semicircle spools and double involute cam mechanism, make the course of action of spool become the extruding action by original Plug Action, make spool and seal ring not wear and tear.Released a kind of novel structure to market, good seal performance do not have to be leaked, pollution-free, safe and reliable novel pair of semicircle spool four-way change-over valve.It puts goods on the market in enormous quantities and will produce remarkable social benefit and economic benefit.

The utility model has three accompanying drawings, wherein:

1 pair of semicircle spool of accompanying drawing four-way change-over valve general illustration.

2 pairs of semicircle spools of accompanying drawing four-way change-over valve horizontal section schematic representation.

3 pairs of semicircle spools of accompanying drawing four-way change-over valve horizontal section schematic representation.

Among the figure: 1, cam 2, semicircle spool 3, upper slide 4, motor 5, speed reducer 6, main shaft 7, position-sensing switch 8, valve housing

Specific embodiment of the utility model as shown in drawings, its structure is that upper and lower two double involute cams are housed on the main shaft at valve housing center, cam outside is two semicircle spools.The semicircle spool couples together by the slideway of upper slide.When the double involute cam rotation, can drive the semicircle valve core rotation, the semicircle spool is entad also done or centrifugal action simultaneously.The action of cam is to drive main shaft after being slowed down by speed reducer by motor to rotate.Position-sensing switch positions by the positioning hole on the upper slide, sends the signal of control motor simultaneously.Its working procedure is: when cam rotates counterclockwise, because cam is the double involute shape, the cam cylindrical withstands the semicircle spool and outwards does centrifugal action, after forwarding several angle to, make the circular arc of semicircle spool be close to the valve housing inwall, form as shown in Figure 2 A and the conducting between B, C and the D.When cam clockwise rotates, the diameter that is equivalent to cam diminishes, the semicircle spool is also along with doing entad motion, when forwarding several angle to, the tooth of the tooth of the involute on the cam and semicircle spool inboard coincide, as shown in Figure 3, the semicircle spool turns clockwise under the drive of cam, when turning to an angle of 90 degrees, the position-sensing switch location is sent signal simultaneously and is reversed to motor, cam is done rotated counterclockwise, and the external arc of semicircle spool is pushed up once more to the valve housing inwall, form the conducting of A and D, B and C shown in Figure 3, thereby finish the commutation action.

Claims

1, a kind of pair of semicircle spool four-way change-over valve; It is characterized in that forming a spool by two semicircle spools (2); Semicircle spool (2) drives action by cam (1); Semicircle spool (2) is slidably connected to upper slide (3); Cam (1) is to slow down the back by main shaft (6) drive rotation by motor (4) by speed reducer (5); Position-sensing switch (7) positions by the positioning hole on the upper slide (3).

2, according to claim 1 pair of semicircle spool four-way change-over valve is characterized in that cam (1) is made up of upper and lower two double involute cams; The semicircle spool outside is made circular-arc, and dentation is made in the inboard.