CN212616490U

CN212616490U - Force balance type two-position three-way change valve

Info

Publication number: CN212616490U
Application number: CN202021443251.4U
Authority: CN
Inventors: 钱伟方; 钱濛逸
Original assignee: Wuxi Qijiuyi Automation Technology Co ltd
Current assignee: Wuxi Qijiuyi Automation Technology Co ltd
Priority date: 2020-07-21
Filing date: 2020-07-21
Publication date: 2021-02-26
Anticipated expiration: 2030-07-21

Abstract

The utility model provides a force balance type two-position three-way reversing valve relates to the reversing valve field. This force balance formula two-position three way reversing valve, including two sets of reset spring, a set of reset spring's right-hand member movable mounting has normally opens the case that resets, normally open the case that resets and keep away from corresponding reset spring's one end movable mounting has normally opens the control case, normally open the left end movable mounting of case that resets has the sealing ring that resets, the right-hand member movable mounting of sealing ring that resets has the sealing washer that resets, normally open the right-hand member movable mounting of case that resets has the main valve sealing washer, normally open the left end movable mounting of control case has the main valve. The force balance type two-position three-way reversing valve has the advantages that the reset sealing ring and the control sealing ring can block the communication between the air source and the working port, the air outlet and the control air source. The sealing ring has the double functions of supporting the valve core and sealing, and has the functions of wear resistance, self lubrication and prolonging the service life of the reversing valve.

Description

Force balance type two-position three-way change valve

Technical Field

The utility model relates to a switching-over valve technical field specifically is force balance formula two-position three-way switching-over valve.

Background

The reversing valve is a directional control valve with more than two flow forms and more than two oil ports. The valve realizes the communication, cut-off and reversal of hydraulic oil flow, pressure unloading and sequential action control. The valve is controlled by the relative movement direction of the valve core and the valve body. There are two types, a rotary valve type and a slide valve type. The valve core is divided into two-position and three-position according to the working position of the valve core staying in the valve body, and the oil circuit connected with the valve body is divided into two-way, three-way, four-way and six-way, and the mode of operating the valve core to move is manual, motor, electric, hydraulic and electrohydraulic.

The pneumatic two-position three-way reversing valves applied to the industry of the determinant bottle-making machine are all non-force balance type stop reversing valves. The reversing valve has good pollution resistance and reliability, but has small working air pressure range, large reversing force, high minimum working air pressure and small circulation capacity. The product of the patent adopts a force balance type structure, and inherits all the advantages of the original product; meanwhile, the reversing force is reduced, the defect of high minimum working pressure is overcome, and the product can normally work in a wide air pressure range; moreover, because the structure adopts the force balance type, the reversing time is shorter, the response speed of the valve is improved, and meanwhile, the flow area of the valve is greatly improved compared with the prior product, so that the running speed of the whole machine is improved, and the production efficiency is improved; the stability and reliability of operation are also improved.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

Aiming at the defects of the prior art, the utility model tries to overcome the defects, so the utility model provides a force balance type two-position three-way reversing valve, thereby improving the running speed of the whole machine and the production efficiency; the stability and reliability of the operation are also improved.

(II) technical scheme

In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: the force balance type two-position three-way reversing valve comprises two groups of reset springs, wherein a normally open reset valve core is movably installed at the right end of one group of reset springs, a normally open control valve core is movably installed at one end, away from the corresponding reset spring, of the normally open reset valve core, a reset sealing ring is movably installed at the left end of the normally open reset valve core, a reset sealing ring is movably installed at the right end of the reset sealing ring, a main valve sealing ring is movably installed at the right end of the normally open reset valve core, a main valve sealing ring is movably installed at the left end of the normally open control valve core, a control sealing ring is movably installed at the right end of the normally open control valve core, a ventilation screw is movably installed at the right end of the normally open control valve core, a sleeve is movably installed at the periphery of, the right end of the other group of reset springs is movably provided with a normally closed reset valve core, and one end of the normally closed reset valve core, which is far away from the corresponding reset spring, is movably provided with a normally closed control valve core.

Furthermore, a reset sealing ring is movably mounted on the normally closed reset valve core, and a reset sealing ring is movably mounted on the normally closed reset valve core.

Further, a control sealing ring is movably mounted on the normally closed control valve core, and a control sealing ring is movably mounted on the normally closed control valve core.

Furthermore, a main valve sealing ring is movably mounted at the right end of the normally closed reset valve core, and a main valve sealing ring is movably mounted at the left end of the normally closed control valve core.

Furthermore, a ventilation screw is movably arranged at the right end of the normally closed control valve core.

Further, a sleeve is movably arranged on the periphery of the normally closed control valve core.

(III) advantageous effects

The utility model provides a force balance type two-position three-way reversing valve. The method has the following beneficial effects:

1. the force balance type two-position three-way reversing valve is a valve seat through a sleeve and is a main body of the valve. The return spring is used for returning the valve core to the initial position. The ventilation screw connects the normally open (closed) control valve core and the normally open (closed) reset valve core together, and the on-off function of cutting off air flow is formed between the main valve sealing ring and the sleeve, so that the reversing of the valve is realized. The reset sealing ring and the control sealing ring play a role in blocking the communication between the air source and the working port, the air outlet and the control air source. The sealing ring has the double functions of supporting the valve core and sealing, and has the functions of wear resistance, self lubrication and prolonging the service life of the reversing valve.

2. The force balance type two-position three-way reversing valve reduces the control air pressure from more than 0.2MPa of the original structure to less than 0.1 MPa. The working pressure is 0.63MPa from 0.3 MPa. The reversing speed and the flow capacity are both obviously improved. Due to the use of the sealing ring made of special material, the service life of the product is nearly doubled compared with the service life of the original product.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1 reset spring, 2 reset sealing rings, 3 reset sealing rings, 4 main valve sealing rings, 5 control sealing rings, 6 control sealing rings, 7 ventilation screws, 8 normally open control valve cores, 9 normally open reset valve cores, 10 sleeve sealing rings, 11 sleeves, 13 normally closed control valve cores and 14 normally closed reset valve cores.

Detailed Description

According to the first aspect of the present invention, the present invention provides a force-balanced two-position three-way directional control valve, as shown in fig. 1-1, comprising two sets of reset springs 1, a normally-open reset valve core 9 movably mounted at the right end of one set of reset springs 1, a normally-open control valve core 8 movably mounted at one end of the normally-open reset valve core 9 away from the corresponding reset spring 1, a reset sealing ring 2 movably mounted at the left end of the normally-open reset valve core 9, a reset sealing ring 3 movably mounted at the right end of the reset sealing ring 2, a main valve sealing ring 4 movably mounted at the right end of the normally-open reset valve core 9, a main valve sealing ring 4 movably mounted at the left end of the normally-open control valve core 8, a control sealing ring 6 movably mounted at the right end of the control sealing ring 6, and a, the outer periphery of the normally open control valve core 8 is movably provided with a sleeve 11, two ends of the sleeve 11 are movably provided with two groups of sleeve sealing rings, the right end of the other group of reset spring 1 is movably provided with a normally closed reset valve core 13, one end, far away from the corresponding reset spring 1, of the normally closed reset valve core 13 is movably provided with a normally closed control valve core 12, the upper part of the normally closed reset valve core 13 is movably provided with a reset sealing ring 2, the upper part of the normally closed reset valve core 13 is movably provided with a reset sealing ring 3, the upper part of the normally closed control valve core 12 is movably provided with a control sealing ring 5, the upper part of the normally closed control valve core 12 is movably provided with a control sealing ring 6, the right end of the normally closed reset valve core 13 is movably provided with a main valve sealing ring 4, the left end of the.

When the control air pressure is zero, the valve core of the reversing valve is positioned at the right position of the sleeve under the action of the spring force. For a normally open valve, a gas source port is communicated with the working port, and an exhaust port is closed; for a normally closed valve, the gas source port is closed with the working port, which communicates with the exhaust port.

When the control air pressure is larger than the lowest control air pressure, the valve core is positioned at the left position of the sleeve under the action of the control air pressure of the reversing valve. For a normally open valve, the gas source port and the working port are closed, and the working port is communicated with the exhaust port; for a normally closed valve, the gas source port communicates with the working port, which is closed off from the exhaust port.

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

Claims

1. The force balance type two-position three-way reversing valve comprises two groups of reset springs (1) and is characterized in that: a normally open reset valve core (9) is movably mounted at the right end of a group of reset springs (1), a normally open control valve core (8) is movably mounted at one end, away from the corresponding reset spring (1), of the normally open reset valve core (9), a reset sealing ring (2) is movably mounted at the left end of the normally open reset valve core (9), a reset sealing ring (3) is movably mounted at the right end of the reset sealing ring (2), a main valve sealing ring (4) is movably mounted at the right end of the normally open reset valve core (9), a main valve sealing ring (4) is movably mounted at the left end of the normally open control valve core (8), a control sealing ring (6) is movably mounted at the right end of the normally open control valve core (8), a control sealing ring (5) is movably mounted at the left end of the control sealing ring (6), and a ventilation, the normally open control valve core (8) is provided with a sleeve (11) at the periphery, two ends of the sleeve (11) are respectively provided with two sets of sleeve sealing rings movably, the right end of the other set of reset spring (1) is provided with a normally closed reset valve core (13), and one end of the normally closed reset valve core (13) far away from the corresponding reset spring (1) is provided with a normally closed control valve core (12) movably.

2. The force balanced two-position three-way reversing valve according to claim 1, characterized in that: the upper part of the normally closed reset valve core (13) is movably provided with a reset sealing ring (2), and the upper part of the normally closed reset valve core (13) is movably provided with a reset sealing ring (3).

3. The force balanced two-position three-way reversing valve according to claim 1, characterized in that: the control sealing ring (5) is movably mounted on the normally closed control valve core (12), and the control sealing ring (6) is movably mounted on the normally closed control valve core (12).

4. The force balanced two-position three-way reversing valve according to claim 1, characterized in that: the right end of the normally closed reset valve core (13) is movably provided with a main valve sealing ring (4), and the left end of the normally closed control valve core (12) is movably provided with the main valve sealing ring (4).

5. The force balanced two-position three-way reversing valve according to claim 1, characterized in that: and a ventilation screw (7) is movably arranged at the right end of the normally closed control valve core (12).

6. The force balanced two-position three-way reversing valve according to claim 1, characterized in that: a sleeve (11) is movably arranged on the periphery of the normally closed control valve core (12).