CN217327886U

CN217327886U - Three-way switching valve group

Info

Publication number: CN217327886U
Application number: CN202220198329.3U
Authority: CN
Inventors: 李见
Original assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Current assignee: Yuethai Hydraulic Technology Shanghai Co ltd
Priority date: 2022-01-25
Filing date: 2022-01-25
Publication date: 2022-08-30
Anticipated expiration: 2032-01-25

Abstract

The utility model discloses a three routes switching valves group, which comprises a valve body, the bottom of valve body is equipped with the T hydraulic fluid port respectively, the B hydraulic fluid port, the left side of valve body is equipped with the A hydraulic fluid port, be provided with vertical first cartridge valve and second cartridge valve in the valve body respectively, first cartridge valve is the same with the structure of second cartridge valve, the side-mounting of valve body has two three-way pilot-operated directional control valves, be provided with the pilot control oil circuit and the pilot control oil circuit is connected with the pi hydraulic fluid port of setting in the valve body front side in the valve body, the inner end of pilot control oil circuit is connected with the control hydraulic fluid port of pilot-operated directional control valve in order to control its break-make, the control hydraulic fluid port and the pilot control oil circuit intercommunication of second cartridge valve, the A hydraulic fluid port passes through the oil inlet intercommunication of damping hole with the pilot-operated directional control valve, the oil port of pilot-operated directional control valve communicates with the control hydraulic fluid port of first cartridge valve, first cartridge valve is parallelly connected with the second cartridge valve. Compared with a conventional reversing valve, the valve bank can meet the requirement of large-flow oil circuit switching, and is simple and compact in structure and low in manufacturing cost.

Description

Three-way switching valve group

Technical Field

The utility model relates to a hydraulic pressure valves technical field specifically is a three routes switching valves.

Background

The hydraulic reversing valve is divided into the following parts according to the number of passages held by the reversing valve: two-way, three-way, four-way, five-way, etc. The absolute movement of the valve body is staggered by the valve core, so that the oil way is communicated, closed or the direction of oil flowing is changed, and the bearing, the ending or the movement direction of the hydraulic pressure fulfillment element and the driving mechanism thereof is changed. However, the conventional reversing valve can meet the requirement of a small flow rate (within 100L/min), and a large-flow reversing valve is required on some large-scale engineering machinery, so that the conventional reversing valve is difficult to meet the requirement.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a three routes switching valves to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme: the three-way switching valve group comprises a valve body, wherein a T oil port and a B oil port are respectively arranged at the bottom of the valve body, an A oil port is arranged on the left side of the valve body, a first vertical cartridge valve and a second vertical cartridge valve are respectively arranged in the valve body, the first cartridge valve and the second cartridge valve are identical in structure, a two-position three-way hydraulic control reversing valve is installed on the side face of the valve body, a pilot control oil path and a pilot control oil path are arranged in the valve body and connected with a pi oil port arranged on the front side of the valve body, the inner end of the pilot control oil path is connected with a control oil port of the hydraulic control reversing valve to control the on-off of the pilot control oil path, the control oil port of the second cartridge valve is communicated with the pilot control oil path, the A oil port is communicated with an oil inlet of the hydraulic control reversing valve through a damping hole, the oil outlet of the hydraulic control reversing valve is communicated with the control oil port of the first cartridge valve, and the first cartridge valve is connected with the second cartridge valve in parallel.

Preferably, the first cartridge valve comprises a first valve cavity arranged in the valve body, the oil port A is communicated with the first valve cavity, the first valve cavity is connected with a first valve core in a sliding mode, the upper end of the oil port T is communicated with the first valve cavity, the oil port T can be blocked when the first valve core is located at the lower position, the diameter of the upper portion of the first valve core is larger than that of the lower portion, a first spring is arranged at the upper end of the first valve core and used for exerting pressure downwards, and the first valve core is provided with a radial through hole for oil to flow through.

Preferably, the second cartridge valve comprises a second valve cavity and a second valve core, the first valve cavity is communicated with the second valve cavity, the upper end of the oil port B is communicated with the second valve cavity, and the oil port B is blocked when the second valve core is in the lower position.

Preferably, a dr oil port is respectively arranged on the front side of the valve body and is connected with an oil return port of the hydraulic control reversing valve.

Compared with the prior art, the beneficial effects of the utility model are that: the valve bank mainly comprises two cartridge valves and a hydraulic control reversing valve, and the cartridge valves can be suitable for a high-flow hydraulic system, so that compared with the conventional reversing valve, the valve bank can meet the requirement of high-flow oil circuit switching, and is simple and compact in structure and low in manufacturing cost.

Drawings

FIG. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic diagram of the oil circuit principle of the present invention.

In the figure: 1. a valve body; 2. an oil port B; 3. a T oil port; 4. a hydraulic control directional control valve; 5. dr oil port; 6. a pi oil port; 7. a first cartridge valve; 71. a first valve chamber; 72. a first valve spool; 73. a first spring; 74. a through hole; 8. a second cartridge valve; 9. and a pilot control oil path.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a three routes switching valves, includes valve body 1, and the bottom of valve body 1 is equipped with T hydraulic fluid port 3, B hydraulic fluid port 2 respectively, and the left side of valve body 1 is equipped with the A hydraulic fluid port, is provided with vertical first cartridge valve 7 and second cartridge valve 8 in the valve body 1 respectively, and first cartridge valve 7 is the same with the structure of second cartridge valve 8 and is two-way cartridge valve, and first cartridge valve 7 is parallelly connected with second cartridge valve 8, can have now to enter into first cartridge valve 7, second cartridge valve 8 from A hydraulic fluid port oil feed.

The hydraulic control reversing valve comprises a valve body 1, a two-position three-way hydraulic control reversing valve 4 is installed on the side face of the valve body 1, a pilot control oil path 9 is arranged in the valve body 1, the pilot control oil path 9 is connected with a pi oil port 6 arranged on the front side of the valve body 1, the inner end of the pilot control oil path 9 is connected with a control oil port of the hydraulic control reversing valve 4 to control the on-off of the pilot control oil path 9, when the pi oil port 6 supplies pressure, the hydraulic control reversing valve 4 is disconnected, a control oil port of a second cartridge valve 8 is communicated with the pilot control oil path 9, an oil port A is communicated with an oil inlet of the hydraulic control reversing valve 4 through a damping hole, an oil outlet of the hydraulic control reversing valve 4 is communicated with a control oil port of a first cartridge valve 7, a dr oil port 5 is respectively arranged on the front side of the valve body 1, the dr oil port 5 is connected with an oil return port of the hydraulic control reversing valve 4, and the dr oil port 5 is used for controlling the pressure relief of the first cartridge valve 7.

The first cartridge valve 7 comprises a first valve cavity 71 arranged in the valve body 1, an oil port A is communicated with the first valve cavity 71, the first valve cavity 71 is connected with a first valve core 72 in a sliding mode, the upper end of the oil port T3 is communicated with the first valve cavity 71, the oil port T3 can be blocked when the first valve core 72 is located at the lower position, the diameter of the upper portion of the first valve core 72 is larger than that of the lower portion, and due to the fact that the upper portion and the lower portion of the first valve core are different in area, upward thrust is generated on the first valve core 72 after the first valve cavity 71 is pressurized. The upper end of the first valve spool 72 is provided with a first spring 73 for applying pressure downwards, the first valve spool 72 is provided with a radial through hole 74 for circulating oil, the second cartridge valve 8 comprises a second valve cavity and a second valve spool, the first valve cavity 71 is communicated with the second valve cavity, the upper end of the oil port B2 is communicated with the second valve cavity, and the second valve spool blocks the oil port B2 when being in a lower position. After the control oil ports of the first cartridge valve 7 and the second cartridge valve 8 are supplied with pressure, oil pressure exists at the upper ends of the first valve core 72 and the second valve core, and the pressure is increased to prevent the first valve core and the second valve core from being jacked upwards.

The working principle is as follows: oil is input from the port A, when the pi oil port 6 is not supplied with pressure, the hydraulic control reversing valve 4 is opened, the control port of the first cartridge valve 7 is supplied with pressure, the port T3 is blocked and closed, the second valve core is lifted up by oil pressure, and the oil is output from the port B; when the pi oil port 6 supplies pressure, the hydraulic control reversing valve 4 is closed, the control port of the second cartridge valve 8 is supplied with pressure, the B oil port 2 is blocked and closed, the first valve core 72 is lifted by oil pressure, and oil is output from the T oil 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 utility model provides a three routes switch valves, includes valve body (1), and the bottom of valve body (1) is equipped with T hydraulic fluid port (3), B hydraulic fluid port (2) respectively, and the left side of valve body (1) is equipped with A hydraulic fluid port, its characterized in that: the valve body (1) is respectively provided with a first vertical cartridge valve (7) and a second cartridge valve (8), the first cartridge valve (7) and the second cartridge valve (8) have the same structure, a two-position three-way hydraulic control reversing valve (4) is arranged on the side surface of the valve body (1), a pilot control oil way (9) is arranged in the valve body (1), the pilot control oil way (9) is connected with a pi oil port (6) arranged on the front side of the valve body (1), the inner end of the pilot control oil way (9) is connected with a control oil port of the hydraulic control reversing valve (4) to control the on-off of the pilot control oil way, a control oil port of the second cartridge valve (8) is communicated with a pilot control oil way (9), the oil port A is communicated with an oil inlet of the hydraulic control reversing valve (4) through a damping hole, an oil outlet of the hydraulic control reversing valve (4) is communicated with a control oil port of the first cartridge valve (7), and the first cartridge valve (7) is connected with the second cartridge valve (8) in parallel.

2. A three-way switching valve group according to claim 1, characterized in that: the first cartridge valve (7) comprises a first valve cavity (71) arranged in a valve body (1), an oil port A is communicated with the first valve cavity (71), the first valve cavity (71) is connected with a first valve core (72) in a sliding mode, the upper end of a T oil port (3) is communicated with the first valve cavity (71), the first valve core (72) is located at the lower position and can block the T oil port (3), the diameter of the upper portion of the first valve core (72) is larger than that of the lower portion, a first spring (73) is installed at the upper end of the first valve core (72) and used for exerting pressure downwards, and a radial through hole (74) is formed in the first valve core (72) to enable oil to flow through.

3. A three-way switching valve group according to claim 2, characterized in that: the second cartridge valve (8) comprises a second valve cavity and a second valve core, the first valve cavity (71) is communicated with the second valve cavity, the upper end of the oil port B (2) is communicated with the second valve cavity, and the oil port B (2) is blocked when the second valve core is located at the lower position.

4. A three-way switching valve group according to claim 1, characterized in that: the front side of the valve body (1) is respectively provided with a dr oil port (5), and the dr oil port (5) is connected with an oil return port of the hydraulic control reversing valve (4).