CN216975365U - Multi-way valve loading oil way and test bed - Google Patents

Abstract

The utility model discloses a multi-way valve loading oil way and a test bed, which comprise a first connector, a second connector, a first bidirectional flowmeter, a second bidirectional flowmeter, a first stop valve, a second stop valve, a third stop valve, a fourth stop valve, a fifth stop valve, a loading valve and an oil return flow divider valve. The loading oil circuit of the multi-way valve can realize the following loading modes of an oil return mode after the first interface is loaded, an oil return mode after the second interface is loaded, an equal-flow output mode of returning to the second interface after the first interface is loaded, an equal-flow output mode of returning to the first interface after the second interface is loaded, an equal-flow output mode of returning to the second interface at low pressure loss of the first interface, and an equal-flow output mode of returning to the first interface at low pressure loss of the second interface; compared with the prior art, the loading mode of the multi-way valve loading oil way is increased, so that the precision in the test process of the multi-way valve is improved.

Description

A multi-way valve loading oil circuit and test bench

technical field

The utility model relates to the field of hydraulic technology, in particular to a multi-way valve loading oil circuit and a test stand.

Background technique

In an open hydraulic system, the multi-way valve can be equipped with a variety of actuators, such as hydraulic cylinders, hydraulic motors and hydraulic hammers. The multi-way valve is equipped with a variety of actuators, and the loading mode corresponding to each working couple in the actual working condition of the multi-way valve also presents diverse characteristics. Therefore, it is also necessary to provide multiple loading modes in the multi-way valve test performance verification process. However, at present, the multi-way valve loading oil circuit of the multi-way valve test bench is mostly the bridge valve loading oil circuit, and there are few loading modes, which leads to the inaccuracy of the multi-way valve test performance verification.

Therefore, how to improve the accuracy of multi-way valve test performance verification is a technical problem to be solved by those skilled in the art.

Utility model content

The purpose of the utility model is to provide a multi-way valve loading oil circuit and a test bench, so as to improve the accuracy of the multi-way valve test performance verification.

In order to achieve the above purpose, the utility model provides a multi-way valve loading oil circuit, which includes a first interface, a second interface, a first two-way flowmeter, a second two-way flowmeter, a first stop valve, a second stop valve, a first stop valve, a second stop valve, and a second stop valve. Three globe valve, fourth globe valve, fifth globe valve, loading valve and oil return diverter valve, among which:

The first interface is used for docking with the first tested connection port of the multi-way valve, and the first interface is communicated with the first port of the first two-way flowmeter;

The second port is used for docking with the second tested connection port of the multi-way valve, and the second port is communicated with the second port of the second two-way flowmeter;

The second port of the first two-way flowmeter is communicated with the first port of the first shut-off valve and the first port of the third shut-off valve;

The second port of the second two-way flowmeter communicates with the second port of the second globe valve and the second port of the fourth globe valve, the first port of the second globe valve is communicated with the second port of the first globe valve, the fourth port The first port of the globe valve is communicated with the second port of the third globe valve;

The inlet of the loading valve is communicated with the oil circuit between the second port of the first cut-off valve and the first port of the second cut-off valve, and the outlet of the loading valve is communicated with the inlet of the oil return diverter valve;

The first outlet of the oil return diverter valve is communicated with the oil circuit between the second port of the third cut-off valve and the first port of the fourth cut-off valve, and the second outlet of the oil return diverter valve is connected with the first port of the fifth cut-off valve. Connected, the second port of the fifth stop valve returns to the oil tank; when the oil return diverter valve is in the left position, the inlet of the oil return diverter valve is connected to the first outlet of the oil return diverter valve, and the inlet of the oil return diverter valve and the oil return diverter The second outlet of the valve is closed; when the oil return diverter valve is in the right position, the inlet of the oil return diverter valve and the first outlet of the oil return diverter valve are closed, and the inlet of the oil return diverter valve is connected with the second outlet of the oil return diverter valve ; When the oil return diverter valve is in the neutral position, the inlet of the oil return diverter valve is connected to the first outlet of the oil return diverter valve and the second outlet of the oil return diverter valve.

In some embodiments of the present invention, the second outlet of the oil return diverter valve communicates with the first port of the fifth shut-off valve through an adjustable flow valve.

In some embodiments of the present invention, when the oil return diverter valve is a load-sensitive valve, the multi-way valve loading oil circuit further includes a load-sensitive pump and a sixth shut-off valve, wherein the inlet of the load-sensitive pump is communicated with the oil tank, and the load-sensitive pump The outlet of the sixth stop valve is connected with the first port of the sixth stop valve, the load port of the load-sensing pump is connected with the compensation port of the oil return diverter valve; the second port of the sixth stop valve is connected with the outlet of the loading valve and the inlet of the oil return diverter valve. The oil circuit between them is connected.

In some embodiments of the present invention, the multi-way valve loading oil circuit further includes a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor and a fifth pressure sensor, wherein the first pressure sensor is used for measuring The pressure at the first interface, the second pressure sensor is used to measure the pressure at the second interface, the third pressure sensor is used to measure the pressure at the second outlet of the oil return diverter valve, and the fourth pressure sensor is used to measure the outlet of the loading valve The fifth pressure sensor is used to measure the pressure at the compensation port of the oil return diverter valve.

In some embodiments of the present invention, a controller is further included, and the controller controls the first shut-off valve, the second shut-off valve, the third shut-off valve, the fourth shut-off valve, the fifth shut-off valve, the sixth shut-off valve, the loading valve and the return valve. The oil diverter valve operates to switch between various loading modes.

In some embodiments of the present invention, the loading modes include flow output modes such as the oil return mode after the first interface is loaded, the oil return mode after the second interface is loaded, the flow output mode such as the first interface returns to the second interface after being loaded, and the second interface returns after the second interface is loaded. A flow output mode such as an interface, a flow output mode such as a low pressure loss of the first interface returning to the second interface, and a flow output mode such as a low pressure loss of the second interface returning to the first interface; wherein:

In the oil return mode after the first port is loaded, the first shut-off valve and the fifth shut-off valve are opened, the second shut-off valve, the third shut-off valve, the fourth shut-off valve and the sixth shut-off valve are shut off, and the oil return diverter valve is in the right position;

In the oil return mode after the second port is loaded, the second shut-off valve and the fifth shut-off valve are opened, the first shut-off valve, the third shut-off valve, the fourth shut-off valve and the sixth shut-off valve are shut off, and the oil return diverter valve is in the right position;

When the first port is loaded and returns to the second port and other flow output modes, the first stop valve and the fourth stop valve are opened, the second stop valve, the third stop valve, the fifth stop valve and the sixth stop valve are closed, and the return oil is divided. The valve is in the left position;

When the second port is loaded and returns to the first port and other flow output modes, the second stop valve and the third stop valve are opened, the first stop valve, the fourth stop valve, the fifth stop valve and the sixth stop valve are closed, and the return oil is divided. The valve is in the left position;

When the low pressure loss of the first port returns to the second port and other flow output modes, the first stop valve and the second stop valve are opened, the third stop valve, the fourth stop valve, the fifth stop valve and the sixth stop valve are closed, and the return oil is divided. The valve is in the neutral position;

When the low pressure loss of the second port returns to the first port and other flow output modes, the second stop valve and the first stop valve are opened, the third stop valve, the fourth stop valve, the fifth stop valve and the sixth stop valve are closed, and the return oil is divided. The valve is in the neutral position.

In some embodiments of the present invention, the loading mode further includes that the input flow rate of the first interface is reduced proportionally to the output mode of the second port, the input flow rate of the second port is decreased proportionally to the output mode of the first port, and the input flow rate of the first port is increased proportionally back to the second port output mode. The interface output mode and the second interface input flow rate increase proportionally back to the first interface output mode;

When the input flow rate of the first port drops back to the output mode of the second port, the first stop valve, the third stop valve and the fifth stop valve are opened, the second stop valve, the fourth stop valve and the sixth stop valve are closed, and the return oil is divided. The valve is in the neutral position;

When the input flow of the second port drops proportionally back to the output mode of the first port, the second stop valve, the fourth stop valve and the fifth stop valve are opened, the first stop valve, the third stop valve and the sixth stop valve are closed, and the return oil is divided. The valve is in the neutral position;

When the input flow rate of the first port increases proportionally and returns to the output mode of the second port, the first stop valve, the fourth stop valve and the sixth stop valve are opened, the second stop valve, the third stop valve and the fifth stop valve are closed, and the return oil is divided. The valve is in the right position;

When the input flow rate of the second port increases proportionally back to the output mode of the first port, the second stop valve, the third stop valve and the sixth stop valve are opened, the first stop valve, the fourth stop valve and the fifth stop valve are cut off, and the return oil is divided. The valve is in the right position.

In some embodiments of the present invention, the load-sensing pump is a load-sensing pump with Ls overriding the hydraulic boost pressure difference.

In some embodiments of the present invention, the first shut-off valve, the second shut-off valve, the third shut-off valve, the fourth shut-off valve, the fifth shut-off valve, and the sixth shut-off valve are ball valves.

The utility model also discloses a multi-way valve test bench, which comprises the multi-way valve loading oil circuit as described above.

The multi-way valve loading oil circuit of the present invention can realize the following loading modes, including the oil return mode after the first interface is loaded, the oil return mode after the second interface is loaded, the flow output mode such as the first interface returning to the second interface after being loaded, the second interface and other flow output modes. After the second port is loaded, it returns to the flow output mode of the first port, the low pressure loss of the first port returns to the flow output mode of the second port, and the low pressure loss of the second port returns to the flow output mode of the first port; wherein: the first port returns to oil after loading In mode, the first shut-off valve and the fifth shut-off valve are opened, the second shut-off valve, the third shut-off valve and the fourth shut-off valve are shut off, and the oil return diverter valve is in the right position; in the oil return mode after the second port is loaded, the second shut-off valve is closed. The cut-off valve and the fifth cut-off valve are opened, the first cut-off valve, the third cut-off valve and the fourth cut-off valve are cut off, and the oil return diverter valve is in the right position; when the first port is loaded and returns to the second port and other flow output modes, the first The cut-off valve and the fourth cut-off valve are opened, the second cut-off valve, the third cut-off valve and the fifth cut-off valve are cut off, and the oil return diverter valve is in the left position; when the second port is loaded and returns to the first port and other flow output modes, the second The shut-off valve and the third shut-off valve are opened, the first shut-off valve, the fourth shut-off valve and the fifth shut-off valve are shut off, and the oil return diverter valve is in the left position; when the low pressure loss of the first port returns to the second port and other flow output modes, the first The shut-off valve and the second shut-off valve are opened, the third shut-off valve, the fourth shut-off valve and the fifth shut-off valve are shut off, and the oil return diverter valve is in the neutral position; when the low-pressure loss of the second port returns to the first port and other flow output modes, the second The shut-off valve and the first shut-off valve are opened, the third shut-off valve, the fourth shut-off valve and the fifth shut-off valve are shut off, and the oil return diverter valve is in the neutral position. Compared with the prior art, the loading mode of the multi-way valve loading oil circuit is increased, thereby improving the accuracy in the testing process of the multi-way valve.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the provided drawings without creative efforts.

1 is a schematic structural diagram of a multi-way valve loading oil circuit provided by an embodiment of the present utility model;

2 is a schematic structural diagram of another multi-way valve loading oil circuit provided by an embodiment of the present invention;

3 is a schematic structural diagram of a third multi-way valve loading oil circuit provided by an embodiment of the present invention.

Among them: 1 is the first interface, 2 is the second interface, 3 is the first two-way flowmeter, 4 is the second two-way flowmeter, 5 is the first shut-off valve, 6 is the second shut-off valve, and 7 is the third shut-off valve , 8 is the fourth shut-off valve, 9 is the fifth shut-off valve, 10 is the loading valve, 11 is the oil return diverter valve, 12 is the adjustable flow valve, 13 is the load-sensing pump, 14 is the sixth shut-off valve, and 15 is the first A pressure sensor, 16 is a second pressure sensor, 17 is a third pressure sensor, 18 is a fourth pressure sensor, and 19 is a fifth pressure sensor.

Detailed ways

The core of the utility model is to provide a multi-way valve loading oil circuit and a test bench, so as to improve the accuracy of the multi-way valve test performance verification.

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Please refer to FIGS. 1 to 3 , the utility model disclosed in the present invention provides a multi-way valve loading oil circuit, including a first interface 1 , a second interface 2 , a first two-way flowmeter 3 , and a second two-way flowmeter 4 , the first cut-off valve 5, the second cut-off valve 6, the third cut-off valve 7, the fourth cut-off valve 8, the fifth cut-off valve 9, the loading valve 10 and the oil return diverter valve 11, wherein: the first port 1 is used to connect with The first tested connection port of the multi-way valve is docked, and the first port 1 is communicated with the first port of the first two-way flowmeter 3; the second port 2 is used for docking with the second tested connection port of the multi-way valve, and The second port 2 is communicated with the second port of the second two-way flowmeter 4; the second port of the first two-way flowmeter 3 is communicated with the first port of the first cut-off valve 5 and the first port of the third cut-off valve 7; The second port of the two-way flowmeter 4 communicates with the second port of the second shut-off valve 6 and the second port of the fourth shut-off valve 8 , and the first port of the second shut-off valve 6 is communicated with the second port of the first shut-off valve 5 The first port of the fourth stop valve 8 is communicated with the second port of the third stop valve 7; the inlet of the loading valve 10 is connected with the second port of the first stop valve 5 and the first port of the second stop valve 6 The outlet of the loading valve 10 is communicated with the inlet of the oil return diverter valve 11; The second outlet of the oil return diverter valve 11 is communicated with the first port of the fifth cut-off valve 9, and the second port of the fifth cut-off valve 9 returns to the oil tank; when the oil return diverter valve 11 is in the left position, it returns to the oil tank. The inlet of the oil diverter valve 11 is connected to the first outlet of the oil return diverter valve 11, and the inlet of the oil return diverter valve 11 and the second outlet of the oil return diverter valve 11 are closed; when the oil return diverter valve 11 is in the right position, the oil returns The inlet of the diverter valve 11 and the first outlet of the oil return diverter valve 11 are closed, and the inlet of the oil return diverter valve 11 is connected to the second outlet of the oil return diverter valve 11; when the oil return diverter valve 11 is in the neutral position, the return oil is diverted The inlet of the valve 11 is connected to both the first outlet of the oil return diverter valve 11 and the second outlet of the oil return diverter valve 11 .

The multi-way valve loading oil circuit of the present invention can realize the following loading modes, including the oil return mode after the first interface 1 is loaded, the oil return mode after the second interface is loaded, the flow output mode such as the first interface returning to the second interface after being loaded, After the second interface is loaded, it returns to the flow output mode of the first interface, the low pressure loss of the first interface returns to the flow output mode of the second interface, and the low pressure loss of the second interface returns to the flow output mode of the first interface; wherein:

In the oil return mode after the first port 1 is loaded, the first shut-off valve 5 and the fifth shut-off valve 9 are opened, the second shut-off valve 6, the third shut-off valve 7 and the fourth shut-off valve 8 are shut off, and the oil return diverter valve 11 is at the right bit. The input oil flows through the first interface 1 through the first two-way flowmeter 3, the first cut-off valve 5, the loading valve 10, the oil return diverter valve 11, and the fifth cut-off valve 9 in sequence, and finally returns to the fuel tank.

In the oil return mode after the second port is loaded, the second stop valve 6 and the fifth stop valve 9 are opened, the first stop valve 5, the third stop valve 7 and the fourth stop valve 8 are closed, and the oil return diverter valve 11 is in the right position . The input oil flows through the second interface 2 through the second two-way flowmeter 4, the second cut-off valve 6, the loading valve 10, the oil return diverter valve 11, and the fifth cut-off valve 9 in sequence, and finally returns to the fuel tank.

When the first port is loaded and returns to the second port and other flow output modes, the first cut-off valve 5 and the fourth cut-off valve 8 are opened, the second cut-off valve 6, the third cut-off valve 7 and the fifth cut-off valve 9 are cut off, and the return oil is divided. Valve 11 is in the left position. The input oil flows through the first interface 1 through the first two-way flowmeter 3, the first cut-off valve 5, the loading valve 10, the oil return diverter valve 11, the fourth cut-off valve 8, and the second two-way flowmeter 4 in sequence, and finally returns to The second interface 2.

When the second port is loaded and returns to the first port and other flow output mode, the second cut-off valve 6 and the third cut-off valve 7 are opened, the first cut-off valve 5, the fourth cut-off valve 8 and the fifth cut-off valve 9 are cut off, and the return oil is divided. Valve 11 is in the left position. The input oil flows from the second port 2 through the second two-way flowmeter 4, the second cut-off valve 6, the loading valve 10, the oil return diverter valve 11, the third cut-off valve 7, and the first two-way flowmeter 3 in sequence, and finally returns to The first interface 1.

When the first port loses low pressure and returns to the second port and other flow output modes, the first cut-off valve 5 and the second cut-off valve 6 are opened, the third cut-off valve 7, the fourth cut-off valve 8 and the fifth cut-off valve 9 are cut off, and the return oil is divided. Valve 11 is in neutral. The input oil is input from the first port 1 and flows through the first two-way flowmeter 3 , the first cut-off valve 5 , the second cut-off valve 6 and the second two-way flowmeter 4 in sequence, and finally returns to the second port 2 .

When the second port loses low pressure and returns to the first port and other flow output modes, the second cut-off valve 6 and the first cut-off valve 5 are opened, the third cut-off valve 7, the fourth cut-off valve 8 and the fifth cut-off valve 9 are cut off, and the return oil is divided. Valve 11 is in neutral. The input oil is input from the second port 2 and flows through the second two-way flowmeter 4 , the second cutoff valve 6 , the first cutoff valve 5 and the first two-way flowmeter 3 in sequence, and finally returns to the first port 1 .

Compared with the prior art, the loading mode of the multi-way valve loading oil circuit is increased, thereby improving the accuracy in the testing process of the multi-way valve.

In some embodiments of the present invention, the second outlet of the oil return diverter valve 11 communicates with the first port of the fifth shut-off valve 9 through the adjustable flow valve 12 . When the oil return diverter valve 11 is a load-sensitive valve, the multi-way valve loading oil circuit also includes a load-sensitive pump 13 and a sixth shut-off valve 14, wherein the inlet of the load-sensitive pump 13 is communicated with the fuel tank, and the outlet of the load-sensitive pump 13 is connected to the oil tank. The first port of the sixth cut-off valve 14 is communicated with the load port of the load-sensing pump 13 and the compensation port of the oil return diverter valve 11 is communicated; the second port of the sixth cut-off valve 14 is connected with the outlet of the loading valve 10 and the oil return diverter valve 11 The oil circuit between the inlets is connected.

In some embodiments of the present invention, the loading modes include the oil return mode after the first interface 1 is loaded, the oil return mode after the second interface is loaded, the flow output modes such as the first interface returning to the second interface after being loaded, and the second interface returning after being loaded. The flow output mode such as the first interface, the flow output mode such as the low pressure loss of the first interface returning to the second interface, and the flow output mode such as the low pressure loss returning to the first interface of the second interface; wherein:

In the oil return mode after the first port 1 is loaded, the first shut-off valve 5 and the fifth shut-off valve 9 are opened, the second shut-off valve 6, the third shut-off valve 7, the fourth shut-off valve 8 and the sixth shut-off valve 14 are shut off, and the return The oil diverter valve 11 is in the right position; the input oil flows through the first interface 1 through the first two-way flowmeter 3, the first stop valve 5, the loading valve 10, the oil return diverter valve 11, the adjustable flow valve 12, the fifth Stop valve 9, and finally return to the fuel tank.

In the oil return mode after the second port is loaded, the second shut-off valve 6 and the fifth shut-off valve 9 are opened, the first shut-off valve 5, the third shut-off valve 7, the fourth shut-off valve 8 and the sixth shut-off valve 14 are shut off, and the oil is returned. The diverter valve 11 is in the right position; the input oil flows from the second port 2 through the second two-way flowmeter 4, the second cut-off valve 6, the loading valve 10, the oil return diverter valve 11, the adjustable flow valve 12, and the fifth cut-off valve. Valve 9, and finally back to the tank.

When the first port is loaded and returns to the second port and other flow output mode, the first cut-off valve 5 and the fourth cut-off valve 8 are opened, the second cut-off valve 6, the third cut-off valve 7, the fifth cut-off valve 9 and the sixth cut-off valve 14 is cut off, the oil return diverter valve 11 is in the left position; the input oil flows from the first port 1 through the first two-way flowmeter 3, the first cut-off valve 5, the loading valve 10, the oil return diverter valve 11, and the fourth cut-off valve. 8. The second bidirectional flowmeter 4, and finally returns to the second interface 2.

When the second port is loaded and returns to the first port and other flow output mode, the second cut-off valve 6 and the third cut-off valve 7 are opened, the first cut-off valve 5, the fourth cut-off valve 8, the fifth cut-off valve 9 and the sixth cut-off valve 14 is cut off, the oil return diverter valve 11 is in the left position; the input oil flows from the second port 2 through the second two-way flowmeter 4, the second cut-off valve 6, the loading valve 10, the oil return diverter valve 11, and the third cut-off valve. 7. The first bidirectional flowmeter 3 returns to the first interface 1 finally.

When the first port loses low pressure and returns to the second port and other flow output modes, the first cut-off valve 5 and the second cut-off valve 6 are opened, the third cut-off valve 7, the fourth cut-off valve 8, the fifth cut-off valve 9 and the sixth cut-off valve 14 is cut off, the oil return diverter valve 11 is in the neutral position; the input oil is input from the first port 1 and flows through the first two-way flowmeter 3, the first cut-off valve 5, the second cut-off valve 6 and the second two-way flowmeter 4 in sequence, Finally back to the second interface 2.

When the low pressure of the second port returns to the first port and other flow output modes, the second globe valve 6 and the first globe valve 5 are opened, the third globe valve 7, the fourth globe valve 8, the fifth globe valve 9 and the sixth globe valve are opened. 14 is closed, and the oil return diverter valve 11 is in the neutral position. The input oil is input from the second port 2 and flows through the second two-way flowmeter 4 , the second cutoff valve 6 , the first cutoff valve 5 and the first two-way flowmeter 3 in sequence, and finally returns to the first port 1 .

The first shut-off valve 5, the second shut-off valve 6, the third shut-off valve 7, the fourth shut-off valve 8, the fifth shut-off valve 9, the sixth shut-off valve 14, the loading valve 10 and the oil return diverter valve 11 can be adjusted manually. Can be adjusted automatically. In some embodiments of the present invention, the multi-way valve loading oil circuit further includes a first pressure sensor 15, a second pressure sensor 16, a third pressure sensor 17, a fourth pressure sensor 18 and a fifth pressure sensor 19, wherein the first pressure sensor 15 The pressure sensor 15 is used to measure the pressure at the first port 1 , the second pressure sensor 16 is used to measure the pressure at the second port 2 , and the third pressure sensor 17 is used to measure the pressure at the second outlet of the oil return diverter valve 11 , the fourth pressure sensor 18 is used to measure the pressure at the outlet of the loading valve 10 , and the fifth pressure sensor 19 is used to measure the pressure at the compensation port of the oil return diverter valve 11 .

In some embodiments of the present invention, the multi-way valve loading oil circuit further includes a controller, and the controller controls the first shut-off valve 5 , the second shut-off valve 6 , the third shut-off valve 7 , the fourth shut-off valve 8 and the fifth shut-off valve 9. The operations of the sixth shut-off valve 14 , the loading valve 10 and the oil return diverting valve 11 are switched in various loading modes.

In some embodiments of the present invention, the loading modes include the oil return mode after the first interface 1 is loaded, the oil return mode after the second interface is loaded, the flow output modes such as the first interface returning to the second interface after being loaded, and the second interface returning after being loaded. The flow output mode such as the first interface, the flow output mode such as the low pressure loss of the first interface returning to the second interface, and the flow output mode such as the low pressure loss returning to the first interface of the second interface; wherein:

In the oil return mode after the first port 1 is loaded, the first shut-off valve 5 and the fifth shut-off valve 9 are opened, the second shut-off valve 6, the third shut-off valve 7, the fourth shut-off valve 8 and the sixth shut-off valve 14 are shut off, and the return The oil diverter valve 11 is in the right position; the input oil flows through the first interface 1 through the first two-way flowmeter 3, the first stop valve 5, the loading valve 10, the oil return diverter valve 11, the adjustable flow valve 12, the fifth Stop valve 9, and finally return to the fuel tank.

In the oil return mode after the second port is loaded, the second shut-off valve 6 and the fifth shut-off valve 9 are opened, the first shut-off valve 5, the third shut-off valve 7, the fourth shut-off valve 8 and the sixth shut-off valve 14 are shut off, and the oil is returned. The diverter valve 11 is in the right position; the input oil flows from the second port 2 through the second two-way flowmeter 4, the second cut-off valve 6, the loading valve 10, the oil return diverter valve 11, the adjustable flow valve 12, and the fifth cut-off valve. Valve 9, and finally back to the tank.

When the first port is loaded and returns to the second port and other flow output mode, the first cut-off valve 5 and the fourth cut-off valve 8 are opened, the second cut-off valve 6, the third cut-off valve 7, the fifth cut-off valve 9 and the sixth cut-off valve 14 is cut off, the oil return diverter valve 11 is in the left position; the input oil flows from the first port 1 through the first two-way flowmeter 3, the first cut-off valve 5, the loading valve 10, the oil return diverter valve 11, and the fourth cut-off valve. 8. The second bidirectional flowmeter 4, and finally returns to the second interface 2.

When the second port is loaded and returns to the first port and other flow output mode, the second cut-off valve 6 and the third cut-off valve 7 are opened, the first cut-off valve 5, the fourth cut-off valve 8, the fifth cut-off valve 9 and the sixth cut-off valve 14 is cut off, the oil return diverter valve 11 is in the left position; the input oil flows from the second port 2 through the second two-way flowmeter 4, the second cut-off valve 6, the loading valve 10, the oil return diverter valve 11, and the third cut-off valve. 7. The first bidirectional flowmeter 3 returns to the first interface 1 finally.

When the first port loses low pressure and returns to the second port and other flow output modes, the first cut-off valve 5 and the second cut-off valve 6 are opened, the third cut-off valve 7, the fourth cut-off valve 8, the fifth cut-off valve 9 and the sixth cut-off valve 14 is cut off, the oil return diverter valve 11 is in the neutral position; the input oil is input from the first port 1 and flows through the first two-way flowmeter 3, the first cut-off valve 5, the second cut-off valve 6 and the second two-way flowmeter 4 in sequence, Finally back to the second interface 2.

When the low pressure of the second port returns to the first port and other flow output modes, the second globe valve 6 and the first globe valve 5 are opened, the third globe valve 7, the fourth globe valve 8, the fifth globe valve 9 and the sixth globe valve are opened. 14 is closed, and the oil return diverter valve 11 is in the neutral position. The input oil is input from the second port 2 and flows through the second two-way flowmeter 4 , the second cutoff valve 6 , the first cutoff valve 5 and the first two-way flowmeter 3 in sequence, and finally returns to the first port 1 .

Further, the loading mode also includes the proportion of the input flow rate of the first interface is reduced back to the second interface output mode, the input flow rate of the second interface is reduced proportionally back to the first interface output mode, the input flow rate of the first interface is increased proportionally back to the second interface output mode, and the first interface input flow rate is returned to the second interface output mode. The input flow rate of the second interface is proportionally returned to the output mode of the first interface; among which:

When the input flow rate of the first port decreases proportionally back to the output mode of the second port, the first shut-off valve 5, the third shut-off valve 7 and the fifth shut-off valve 9 are opened, the second shut-off valve 6, the fourth shut-off valve 8 and the sixth shut-off valve 14 is closed, and the oil return diverter valve 11 is in the neutral position. The adjustment of the opening of the oil return diverter valve 11 makes the input flow and the return oil flow reach the target ratio through calibration correction (or self-learning, etc.), so that the output flow and the input flow are output according to the target ratio. The oil back pressure is followed by compensation to ensure that the influence of the measured return oil back pressure of the multi-way valve on the proportional distribution of the return oil flow is eliminated. The input oil flows through the first two-way flowmeter 3, the first The cut-off valve 5 , the loading valve 10 and the oil return diverter valve 11 , after the oil return diverter valve 11 , the output flow rate of the target proportion is finally returned to the second port 2 through the fourth cut-off valve 8 and the second two-way flowmeter 4 , and the remaining flow Return oil.

When the input flow rate of the second port drops proportionally back to the output mode of the first port, the second shut-off valve 6, the fourth shut-off valve 8 and the fifth shut-off valve 9 are opened, the first shut-off valve 5, the third shut-off valve 7 and the sixth shut-off valve 14 is cut off, the oil return diverter valve 11 is in the neutral position; the opening degree of the oil return diverter valve 11 is adjusted through calibration correction (or self-learning, etc.) to make the input flow and the oil return flow reach the target ratio, so as to realize the output flow and the input flow. Target proportional output, follow-up compensation for the oil return back pressure through the adjustable flow valve 12 to ensure that the influence of the measured return oil back pressure of the multi-way valve on the proportional distribution of the return oil flow is eliminated. It flows through the second two-way flowmeter 4, the second cut-off valve 6, the loading valve 10 and the oil return diverter valve 11 in sequence. After the oil return diverter valve 11, the output flow of the target proportion passes through the third cut-off valve 7 and the first two-way flow. The meter 3 finally returns to the first port 1, and the rest of the flow returns to the oil.

When the input flow rate of the first port rises proportionally and returns to the output mode of the second port, the first globe valve 5, the fourth globe valve 8 and the sixth globe valve 14 are opened, the second globe valve 6, the third globe valve 7 and the fifth globe valve are opened. 9 is cut off, the oil return diverter valve 11 is in the right position; the left position opening of the oil return diverter valve 11 is regulated by the change of the input flow rate to ensure that the feedback differential pressure is constant, and the input oil flows through the first port 1 in turn through the first two-way The flowmeter 3, the first stop valve 5, the loading valve 10 to the oil return diverter valve 11, the oil return diverter valve 11 provides the Ls pressure signal for the load sensitive pump 13, and the control pressure difference of the load sensitive pump 13 is increased through the Ls override, through the load The sensitive pump 13 compensates the input flow of the oil return diverter valve 11, and the output flow of the loading oil circuit is controlled in an upward proportion relative to the input flow.

When the input flow rate of the second port increases proportionally back to the output mode of the first port, the second globe valve 6, the third globe valve 7 and the sixth globe valve 14 are opened, the first globe valve 5, the fourth globe valve 8 and the fifth globe valve are opened. 9 is closed, and the oil return diverter valve 11 is in the right position. The left opening of the oil return diverter valve 11 is regulated by the change of the input flow rate to ensure a constant feedback differential pressure. 10 to the oil return diverter valve 11, the oil return diverter valve 11 provides the Ls pressure signal for the load-sensitive pump 13, and increases the control pressure difference of the load-sensitive pump 13 through Ls overriding, and the load-sensitive pump 13 is used to control the input flow of the oil-return diverter valve 11. Compensation, the output flow of the loading oil circuit is controlled in proportion to the input flow.

In some embodiments of the present invention, the load-sensing pump 13 is a load-sensing pump 13 with Ls with hydraulic boost differential override or other load-sensing pump 13 with Ls differential override.

In some embodiments of the present invention, the first shut-off valve 5 , the second shut-off valve 6 , the third shut-off valve 7 , the fourth shut-off valve 8 , the fifth shut-off valve 9 , and the sixth shut-off valve 14 are ball valves. The ball valve has small pressure loss, small internal leakage, and can realize bidirectional conduction, avoiding unnecessary opening pressure in the oil circuit, so the pressure loss of the oil passage can be minimized.

The utility model also discloses a multi-way valve test bench, which comprises the multi-way valve loading oil circuit as described above. Since the above-mentioned multi-way valve loading oil circuit has the above beneficial effects, the multi-way valve test bench including the multi-way valve loading oil circuit has corresponding effects, which will not be repeated here.

It should be noted that, for the convenience of description, only the parts related to the relevant application of the present invention are shown in the drawings. The embodiments in this application and the features in the embodiments may be combined with each other without conflict.

It should be understood that "system", "device", "unit" and/or "module" as used in this application is a method used to distinguish different components, elements, parts, parts or assemblies at different levels. However, other words may be replaced by other expressions if they serve the same purpose.

As shown in this application and in the claims, unless the context clearly dictates otherwise, the words "a", "an", "an" and/or "the" are not intended to be specific in the singular and may include the plural. Generally speaking, the terms "comprising" and "comprising" only imply that the clearly identified steps and elements are included, and these steps and elements do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. The inclusion of an element by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture or apparatus that includes the element.

Wherein, in the description of the embodiments of the present application, unless otherwise stated, “/” means or means, for example, A/B can mean A or B; “and/or” in this document is only a description of the associated object The association relationship of , indicates that there can be three kinds of relationships, for example, A and/or B, can indicate that A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of the present application, "plurality" refers to two or more than two.

Hereinafter, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature.

Flow diagrams are used in this application to illustrate operations performed by a system according to an embodiment of the application. It should be understood that the preceding or following operations are not necessarily performed in the exact order. Instead, the various steps can be processed in reverse order or simultaneously. At the same time, other actions can be added to these procedures, or a step or steps can be removed from these procedures.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A multi-way valve loading oil circuit, characterized in that it comprises a first interface, a second interface, a first two-way flowmeter, a second two-way flowmeter, a first cut-off valve, a second cut-off valve, and a third cut-off valve , the fourth shut-off valve, the fifth shut-off valve, the loading valve and the oil return diverter valve, of which: The first interface is used for docking with the first tested connection port of the multi-way valve, and the first interface is communicated with the first port of the first two-way flowmeter; The second interface is used for docking with the second tested connection port of the multi-way valve, and the second interface is communicated with the second port of the second two-way flowmeter; The second port of the first two-way flowmeter communicates with the first port of the first shut-off valve and the first port of the third shut-off valve; The second port of the second two-way flowmeter communicates with the second port of the second shut-off valve and the second port of the fourth shut-off valve, and the first port of the second shut-off valve is connected to the first The second port of the cut-off valve is communicated, and the first port of the fourth cut-off valve is communicated with the second port of the third cut-off valve; The inlet of the loading valve is communicated with the oil circuit between the second port of the first shut-off valve and the first port of the second shut-off valve, and the outlet of the loading valve is connected with the inlet of the oil return diverter valve connected; The first outlet of the oil return diverter valve is in communication with the oil circuit between the second port of the third shut-off valve and the first port of the fourth shut-off valve, and the second outlet of the oil return diverter valve is connected to the oil circuit. The first port of the fifth cut-off valve is connected, and the second port of the fifth cut-off valve returns to the oil tank; when the oil return diverter valve is in the left position, the inlet of the oil return diverter valve is connected to the oil return diverter valve. The first outlet is connected, and the inlet of the oil return diverter valve and the second outlet of the oil return diverter valve are closed; when the oil return diverter valve is in the right position, the inlet of the oil return diverter valve is connected to the return oil diverter valve. The first outlet of the oil diversion valve is closed, and the inlet of the oil return diversion valve is connected to the second outlet of the oil return diversion valve; when the oil return diversion valve is in the neutral position, the inlet of the oil return diversion valve It communicates with the first outlet of the oil return diverter valve and the second outlet of the oil return diverter valve. 2 . The multi-way valve loading oil circuit according to claim 1 , wherein the second outlet of the oil return diverter valve communicates with the first port of the fifth shut-off valve through an adjustable flow valve. 3 . 3. The multi-way valve loading oil circuit according to claim 2, wherein when the oil return diverter valve is a load-sensitive valve, the multi-way valve loading oil circuit further comprises a load-sensitive pump, and a sixth cut-off valve valve, wherein the inlet of the load-sensing pump communicates with the oil tank, the outlet of the load-sensing pump communicates with the first port of the sixth shut-off valve, and the load port of the load-sensing pump communicates with the oil return diverter valve The compensation port is communicated with; the second port of the sixth shut-off valve is communicated with the oil circuit between the outlet of the loading valve and the inlet of the oil return diverter valve. 4. The multi-way valve loading oil circuit according to claim 3, wherein the multi-way valve loading oil circuit further comprises a first pressure sensor, a second pressure sensor, a third pressure sensor, a fourth pressure sensor and a A fifth pressure sensor, wherein the first pressure sensor is used to measure the pressure at the first interface, the second pressure sensor is used to measure the pressure at the second interface, and the third pressure sensor is used for In order to measure the pressure at the second outlet of the oil return diverter valve, the fourth pressure sensor is used to measure the pressure at the outlet of the loading valve, and the fifth pressure sensor is used to measure the pressure of the oil return diverter valve. Compensate the pressure at the port. 5. The multi-way valve loading oil circuit according to claim 4, further comprising a controller, wherein the controller controls the first shut-off valve, the second shut-off valve, and the third shut-off valve , the operation of the fourth shut-off valve, the fifth shut-off valve, the sixth shut-off valve, the loading valve and the oil return diverting valve can be switched in various loading modes. 6 . The multi-way valve loading oil circuit according to claim 5 , wherein the loading modes include an oil return mode after the first interface is loaded, an oil return mode after the second interface is loaded, and an oil return mode after the first interface is loaded. 7 . The second port is equal to the flow output mode, the second port is loaded and then returns to the first port and other flow output modes, the first port low pressure loss returns to the second port and other flow output modes, and the second port low pressure loss returns to the first port and other flow output modes; wherein : In the oil return mode after the first port is loaded, the first shut-off valve and the fifth shut-off valve are opened, the second shut-off valve, the third shut-off valve, the fourth shut-off valve and the The sixth stop valve is closed, and the oil return diverter valve is in the right position; In the oil return mode after the second port is loaded, the second shut-off valve and the fifth shut-off valve are opened, the first shut-off valve, the third shut-off valve, the fourth shut-off valve and the The sixth stop valve is closed, and the oil return diverter valve is in the right position; When the first port is loaded and returns to the second port and other flow output modes, the first shut-off valve and the fourth shut-off valve are opened, the second shut-off valve, the third shut-off valve, the fifth shut-off valve and the fifth shut-off valve are opened. The shut-off valve and the sixth shut-off valve are shut off, and the oil return diverter valve is in the left position; When the second port is loaded and returns to the first port and other flow output mode, the second shut-off valve and the third shut-off valve are opened, the first shut-off valve, the fourth shut-off valve, the fifth shut-off valve, the The shut-off valve and the sixth shut-off valve are shut off, and the oil return diverter valve is in the left position; When the low pressure of the first port returns to the second port and other flow output modes, the first shut-off valve and the second shut-off valve are opened, the third shut-off valve, the fourth shut-off valve, and the fifth shut-off valve The cut-off valve and the sixth cut-off valve are cut off, and the oil return diverter valve is in the neutral position; When the low pressure of the second port returns to the first port and other flow output modes, the second shut-off valve and the first shut-off valve are opened, the third shut-off valve, the fourth shut-off valve, and the fifth shut-off valve The shut-off valve and the sixth shut-off valve are shut off, and the oil return diverter valve is in the neutral position. 7 . The multi-way valve loading oil circuit according to claim 6 , wherein the loading mode further comprises that the input flow rate of the first port is reduced proportionally to the output mode of the second port, and the input flow rate of the second port is decreased proportionally to the first port. 8 . The interface output mode, the first interface input flow rate rises back to the second interface output mode, and the second interface input flow rate rises back to the first interface output mode; When the input flow rate of the first interface drops proportionally back to the output mode of the second interface, the first shut-off valve, the third shut-off valve and the fifth shut-off valve are opened, the second shut-off valve, the fourth shut-off valve and the fourth shut-off valve are opened. The cut-off valve and the sixth cut-off valve are cut off, and the oil return diverter valve is in the neutral position; When the input flow rate of the second port drops proportionally back to the output mode of the first port, the second shut-off valve, the fourth shut-off valve and the fifth shut-off valve are opened, the first shut-off valve, the third shut-off valve and the third shut-off valve are opened. The cut-off valve and the sixth cut-off valve are cut off, and the oil return diverter valve is in the neutral position; When the input flow rate of the first interface rises proportionally and returns to the output mode of the second interface, the first shut-off valve, the fourth shut-off valve and the sixth shut-off valve are opened, the second shut-off valve, the third shut-off valve and the third shut-off valve are opened. The cut-off valve and the fifth cut-off valve are cut off, and the oil return diverter valve is in the right position; When the input flow rate of the second port increases proportionally back to the output mode of the first port, the second shut-off valve, the third shut-off valve and the sixth shut-off valve are opened, the first shut-off valve, the fourth shut-off valve and the fourth shut-off valve are opened. The shut-off valve and the fifth shut-off valve are shut off, and the oil return diverter valve is in the right position. 8. The multi-way valve loading oil circuit according to any one of claims 3 to 7, wherein the load-sensing pump is an Ls load-sensing pump with hydraulic boost differential override. 9. The multi-way valve loading oil circuit according to any one of claims 3 to 7, wherein the first shut-off valve, the second shut-off valve, the third shut-off valve, the first shut-off valve, the The fourth shut-off valve, the fifth shut-off valve, and the sixth shut-off valve are ball valves. 10. A multi-way valve test bench, characterized by comprising the multi-way valve loading oil circuit according to any one of claims 1 to 9.

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