CN212959329U

CN212959329U - Priority valve with cartridge formula relief valve

Info

Publication number: CN212959329U
Application number: CN202021398212.7U
Authority: CN
Inventors: 蔡国定; 何关清; 金鑫
Original assignee: Wuhu Zhongyi Hydraulic Technology Co ltd
Current assignee: Wuhu Zhongyi Hydraulic Technology Co ltd
Priority date: 2020-07-16
Filing date: 2020-07-16
Publication date: 2021-04-13
Anticipated expiration: 2030-07-16

Abstract

The utility model discloses a priority valve with cartridge formula relief valve, including the priority valve casing, be provided with oil inlet P, oil return T, oil-out CF, oil-out EF and control hydraulic fluid port LS on the casing, oil return T and control hydraulic fluid port LS lie in the same side of casing and set up side by side, oil-out CF and oil-out EF lie in the casing bottom and set up side by side, oil inlet P places in the casing top, is equipped with the relief valve in the oil return T, swing joint between relief valve and the casing; adopt the utility model discloses the scheme will need a subassembly to add the relief valve that a subassembly equipment formed originally to transform into the relief valve of integration, has avoided loaded down with trivial details and troublesome installation, has saved manpower resources and time resource for the enterprise, and adopts the relief valve of formula of cuting straightly, has avoided appearing the condition of installation mistake, has optimized priority valve steering system's system configuration, provides fine prerequisite for priority valve steering system's popularization.

Description

Priority valve with cartridge formula relief valve

Technical Field

The utility model belongs to the hydraulic pressure field, more specifically says, the utility model relates to a priority valve with cartridge formula relief valve.

Background

At present, a steering system is used in a plurality of mechanical devices, the steering system is divided into a plurality of steering systems, a hydraulic steering system, a priority valve steering system, a flow amplification steering system and the like are provided, the priority valve steering system is used most widely, a safety valve inside a priority valve is generally installed by one component, and due to the fact that the safety valve is installed inside the priority valve, the installation process is extremely troublesome and tedious, a large amount of human resources and time are wasted, fine errors easily occur in the installation process, and the energy of people is consumed in the installation process.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a priority valve with cartridge formula relief valve that simple to operate and be difficult for makeing mistakes is provided.

In order to realize the purpose, the utility model discloses the technical scheme who takes does: the utility model provides a priority valve with cartridge formula relief valve, includes priority valve casing, be provided with oil inlet P, oil return T, oil-out CF, oil-out EF and control hydraulic fluid port LS on the casing, oil return T and control hydraulic fluid port LS are located the casing and just set up with one side, and oil-out CF and oil-out EF are located the casing bottom and just set up side by side, and oil inlet P places in the casing top, is equipped with the relief valve in the oil return T, swing joint between relief valve and the casing.

The utility model discloses a priority valve with cartridge formula relief valve, the relief valve includes relief valve base and T mouth interface seat, and relief valve base both sides are equipped with auxiliary portion, fixed connection between auxiliary portion and the relief valve base, and T mouth interface seat both sides are equipped with screws up the portion, screws up fixed connection between portion and the T mouth interface seat both sides, are equipped with the relief valve case between relief valve base and the T mouth interface seat, and the one end that the relief valve base was kept away from to the relief valve case is equipped with the relief valve spring, is fixed connection between relief valve spring and relief valve case and the T mouth interface seat.

The utility model discloses a priority valve with cartridge formula relief valve, the auxiliary portion is fixed connection including the O shape circle that is used for the auxiliary connection and the filter screen that is used for crossing the filter oil between O shape circle and filter screen and the relief valve base.

The utility model discloses a priority valve with cartridge formula relief valve, the portion of screwing up includes pressure regulating screw and lock nut, pressure regulating screw and lock nut and T mouthful interface pad both sides fixed connection.

The utility model discloses a priority valve with cartridge formula relief valve, oil inlet P the relief valve with thick solid line oil circuit that oil return opening T is constituteed is hydraulic pressure schematic diagram main oil circuit.

The utility model discloses a priority valve with cartridge formula relief valve, the oil circuit of control hydraulic fluid port LS control is the draining oil circuit, oil inlet P still is equipped with an imaginary line oil circuit PP and is the preferential fuel feeding oil circuit.

Adopt the utility model discloses the scheme will need a subassembly to add the relief valve that a subassembly equipment formed originally to transform into the relief valve of integration, has avoided loaded down with trivial details and troublesome installation, has saved manpower resources and time resource for the enterprise, and adopts the relief valve of formula of cuting straightly, has avoided appearing the condition of installation mistake, has optimized priority valve steering system's system configuration, provides fine prerequisite for priority valve steering system's popularization.

The present invention will be described in more detail with reference to the accompanying drawings and examples.

Drawings

The contents of the description and the references in the drawings are briefly described as follows:

fig. 1 is a front view of the present invention;

fig. 2 is a schematic view of the safety valve of the present invention;

FIG. 3 is a schematic view of the hydraulic principle of the present invention;

fig. 4 is a side view of the present invention;

labeled as: 1. a safety valve base; 2. an O-shaped ring; 3. a safety valve core; 4. a safety valve spring; 5. a pressure regulating screw; 6. locking the nut; 7. a T-port interface seat; 8. a filter screen; 9. a housing;

Detailed Description

The following description of the embodiments of the present invention, with reference to the accompanying drawings, will be made in further detail to explain, for example, the shapes and structures of the components, the mutual positions and connection relationships among the components, the functions and working principles of the components, the manufacturing process, and the operation and use method of the components, so as to help those skilled in the art to understand the concept and technical solutions of the present invention more completely, accurately and deeply.

Fig. 1 is a front view of the present invention; fig. 2 is a schematic view of the safety valve of the present invention; FIG. 3 is a schematic view of the hydraulic principle of the present invention; fig. 4 is a side view of the present invention; the priority valve with the cartridge safety valve comprises a priority valve shell 9, wherein an oil inlet P, an oil return port T, an oil outlet CF, an oil outlet EF and a control oil port LS are arranged on the shell 9, the oil return port T and the control oil port LS are located on the same side of the shell 9 and are arranged side by side, the oil outlet CF and the oil outlet EF are located on the bottom of the shell and are arranged side by side, the oil inlet P is placed at the top of the shell, the safety valve is arranged in the oil return port T, and the safety valve is movably connected with the shell 9.

As shown in fig. 2 and 4, the safety valve includes a safety valve base 1 and a T-port connector base 7, wherein auxiliary portions are disposed on two sides of the safety valve base 1, the auxiliary portions are fixedly connected with the safety valve base 1, tightening portions are disposed on two sides of the T-port connector base 7, the tightening portions are fixedly connected with two sides of the T-port connector base 7, a safety valve spool 3 is disposed between the safety valve base 1 and the T-port connector base 7, a safety valve spring 4 is disposed at one end of the safety valve spool 3 away from the safety valve base 1, and the safety valve spring 4 is fixedly connected with the safety valve spool 3 and the T-port connector base 7; the auxiliary part comprises an O-shaped ring 2 for auxiliary connection and a filter screen 8 for filtering oil, and the O-shaped ring 2 and the filter screen 8 are fixedly connected with the safety valve base 1; the tightening part comprises a pressure regulating screw 5 and a locking nut 6, and the pressure regulating screw 5 and the locking nut 6 are fixedly connected with two sides of the T-shaped port interface seat 7.

As shown in the hydraulic schematic diagram of fig. 3, a heavy solid line oil path formed by the oil inlet P, the safety valve and the oil return port T is a main oil path of the hydraulic schematic diagram, an oil path controlled by the control oil port LS is an oil drainage oil path, and the oil inlet P is further provided with a dotted line oil path PP as a preferential oil supply path.

As shown in the hydraulic schematic diagram of fig. 3, the working principle of the priority valve in the hydraulic steering gear is as follows: when oil enters the oil inlet P, hydraulic oil is preferentially supplied to the oil outlet CF, when the steering gear does not work, the oil outlet CF is in a closed state, the pressure of the oil port LS is controlled to be zero at the moment, and double-pump confluence is achieved; when the steering gear works, the oil outlet CF is connected with the steering oil cylinder through the steering gear, and oil from the steering pump enters the steering oil cylinder to steer the loader; when the load of the steering gear exceeds a rated value, the pressure oil of the oil port LS is controlled to open the steering safety valve, the oil drainage oil path controlled by the oil port LS starts to release pressure, and the oil from the steering pump flows into the working system.

When the hydraulic oil supply device is used, the safety valve is directly inserted into the T port, and when oil enters the oil inlet P, hydraulic oil is preferentially supplied to the oil outlet CF; the oil outlet CF is connected with a steering oil cylinder through a steering gear, and oil from a steering pump enters the steering oil cylinder to steer the loader; the pressure signal of the control oil port LS acts on the left end of the valve core of the priority valve through the small throttling hole, the pressure of the right end of the valve core of the priority valve is lower than the pressure of the outlet of the steering gear at the moment, due to the change of the pressure difference of the left end and the right end of the valve core of the priority valve and the action of a priority valve spring, when the rotating speed of the steering gear is very high, the valve core of the priority valve is moved rightwards to be closed, hydraulic oil is preferentially supplied to the steering gear, when the load of the steering gear exceeds a rated value, the pressure oil of the control oil port LS enables a steering safety valve to be opened, the pressure of the;

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above-mentioned manner, and various insubstantial improvements can be made without modification to the method and technical solution of the present invention, or the present invention can be directly applied to other occasions without modification, all within the scope of the present invention.

Claims

1. The utility model provides a priority valve with cartridge formula relief valve, includes priority valve casing, its characterized in that, be provided with oil inlet P, oil return T, oil-out CF, oil-out EF and control hydraulic fluid port LS on the casing, oil return T and control hydraulic fluid port LS are located the casing and just set up side by side with one side, and oil-out CF and oil-out EF are located the casing bottom and just set up side by side, and oil inlet P places in the casing top, is equipped with the relief valve in the oil return T, swing joint between relief valve and the casing.

2. The priority valve with a cartridge safety valve according to claim 1, wherein the safety valve comprises a safety valve base and a T-port connector seat, the safety valve base is provided with auxiliary portions at two sides, the auxiliary portions are fixedly connected with the safety valve base, the T-port connector seat is provided with tightening portions at two sides, the tightening portions are fixedly connected with two sides of the T-port connector seat, a safety valve core is arranged between the safety valve base and the T-port connector seat, a safety valve spring is arranged at one end of the safety valve core far away from the safety valve base, and the safety valve spring is fixedly connected with the safety valve core and the T-port connector seat.

3. The priority valve with a cartridge safety valve according to claim 2, wherein the auxiliary portion includes an O-ring for auxiliary connection and a filter screen for filtering oil, and the O-ring and the filter screen are fixedly connected to the safety valve base.

4. The priority valve with a cartridge safety valve of claim 2, wherein the tightening part comprises a pressure adjusting screw and a locking nut, and the pressure adjusting screw and the locking nut are fixedly connected with two sides of the T-port interface seat.

5. The priority valve with a cartridge type safety valve according to claim 1, wherein a heavy solid line oil path formed by the oil inlet P, the safety valve and the oil return port T is a hydraulic schematic main oil path.

6. The priority valve with a cartridge safety valve as claimed in claim 1, wherein the dashed line oil path controlled by the control oil port LS is an oil drainage oil path, and the oil inlet P is further provided with a dashed line oil path PP as a priority oil supply oil path.