Test device with adjustable flow and pressure

Abstract

The utility model provides a flow pressure adjustable test device, which is characterized in that a cover plate is located at an opening above a box body, a valve group, a control box and an air filter element are respectively fixed above the cover plate through screws, a motor and a pump are connected together through a coupler, the motor is located above the cover plate, the coupler is located below the cover plate, the coupler penetrates through the cover plate, and the valve group is fixed on the cover plate. The control box controls the forward and reverse rotation directions and the rotation speed of the motor, the motor drives the pump to pump liquid in the oil tank into the pump, and the pump feeds the liquid with pressure and flow into the valve group. Parts and pipelines can be compatible with special liquid, and the water-ethylene glycol mixture cannot corrode the parts and the pipelines in the using process; the overflow valve and the throttle valve in the valve group are used for adjusting the flow and the pressure in the pipeline, so that the flow and the pressure in the pipeline reach values required by testing, and the flow and the pressure in the pipeline can be adjusted; and the flow meter and the pressure gauge are arranged in the pipeline, so that the flow and the pressure in the pipeline can be monitored at any time.

Description

Technical Field

[0001] The invention relates to the field of test devices, in particular to a flow pressure test device. Background Art

[0002] The flow and pressure adjustable test device is one of the key equipment for hydraulic product inspection and acceptance. The current equipment is an integrated device of pump, pressure gauge and valve. Its flow and pressure adjustable range is relatively small, and the accuracy deviation is large. It is difficult to meet the product testing and acceptance with high accuracy requirements. In addition, the current equipment is difficult to be compatible with special liquid media (water-ethylene glycol mixture). The current product testing requires flow and pressure accuracy and compatibility with special liquid media (water-ethylene glycol mixture).

[0003] The existing equipment has a small adjustable range of flow and pressure, low precision, and is difficult to be compatible with special liquid media (water-ethylene glycol mixture). Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a flow and pressure adjustable test device. The device mainly solves the following technical problems: 1. Compatible with special liquid media (water-ethylene glycol mixture); 2. Realize adjustable flow and pressure with high adjustment accuracy; 3. Conveniently test the inlet and outlet pressure of the device and the flow in the pipeline; 4. Realize static pressure holding test; In summary, through the system design of the device, the selection of parts and components, and the actual working condition verification, it is verified whether its performance indicators fully meet the use requirements of hydraulic product testing and acceptance.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] A flow and pressure adjustable test device comprises an oil tank, a pump, a coupling, an air filter element, a control box, a motor and a valve group.

[0007] The oil tank includes a box body and a cover plate. The cover plate is located at the opening above the box body. The valve group, control box and air filter element are fixed on the cover plate by screws respectively. The motor and the pump are connected together by a coupling. The motor is located above the cover plate, and the coupling is located below the cover plate. The coupling passes through the cover plate. The control box controls the forward and reverse direction and speed of the motor. The motor drives the pump to draw the liquid in the oil tank into the pump, and the pump sends the liquid with pressure and flow into the valve group.

[0008] A bell-shaped housing is arranged on the periphery of the coupling, and the bell-shaped housing is installed above the oil tank cover plate by screws.

[0009] In the valve group, the liquid inlet of the valve group is connected to the outlet of the pump, which is the P port; the outlet of the valve group is connected to the inlet of the tested part, which is the A port; the return liquid port of the valve group is connected to the outlet of the tested part, which is the B port; the return liquid port is connected to the oil tank, which are the T port and the T1 port respectively; the test port is connected to a pressure gauge to detect the pressure in the hydraulic pipeline, which is the Ce port; an overflow valve is provided between the P port and the T port; a throttle valve 2 is provided between the A port and the P port; and a throttle valve 1 is provided between the B port and the T1 port.

[0010] By adjusting the overflow valve, the pressure and flow of the overflow hydraulic pressure from port T are controlled. Throttle valve 2 controls the pressure and flow of the liquid flowing out of port A. Throttle valve 1 controls the pressure and flow of the liquid returning from port T1.

[0011] The control box controls the rotation mode and speed of the motor.

[0012] The motor drives the pump to rotate and delivers the liquid in the oil tank to the P port of the valve group. The flow rate and pressure entering the A port are controlled by the overflow valve and throttle valve in the valve group. The pipeline is equipped with a flow meter and a pressure gauge to display the flow rate and pressure values ​​respectively, so as to realize the flow resistance and pressure test of the hydraulic product.

[0013] The beneficial effect of the present invention is that it provides a flow and pressure adjustable test device, the overall performance of which fully meets the use requirements from the perspective of device material selection analysis and theoretical calculation, and the selection of purchased parts and standard parts (selection of pump flow, pressure, and medium, selection of motor power, speed, and torque, and determination of pipeline pressure resistance and medium) can replace the integrated device of pump, pressure gauge, and valve.

[0014] The components and pipelines of the present invention are compatible with special liquids (water-ethylene glycol mixtures), and the water-ethylene glycol mixtures will not cause corrosion to the components and pipelines during use;

[0015] The overflow valve and throttle valve in the valve group are used to adjust the flow and pressure in the pipeline so that the flow and pressure in the pipeline reach the required values ​​for the test, and the flow and pressure in the pipeline can be adjusted;

[0016] The pipeline is equipped with a flow meter and a pressure gauge to monitor the flow and pressure in the pipeline at any time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the flow pressure adjustable test device of the present invention, Figure 1 (a) is the side view of the flow and pressure adjustable test device. Figure 1 (b) is a top view of the flow and pressure adjustable test device.

[0018] Figure 2 Schematic diagram of the internal principle of the valve group of the present invention.

[0019] Figure 3 This is a working principle diagram of the flow and pressure adjustable test device of the present invention.

[0020] Among them, 1-oil tank (transparent state), 2-valve group, 3-motor, 4-control box, 5-bell cover, 6-pump, 7-air filter element. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0022] A flow and pressure adjustable test device, comprising an oil tank, a pump, a coupling, a bell housing, an air filter element, a motor, a valve group, a hydraulic pipeline, a control box, a flow meter and a pressure gauge, such as Figure 1 shown.

[0023] The oil tank is composed of a box body and a cover plate. The valve group, control box, and air filter are connected to the top of the oil tank cover plate by screws. The motor and pump are connected together through a bell cover and a coupling. The bell cover is installed on the top of the oil tank cover plate by screws. The control box controls the forward and reverse rotation and speed of the motor. The motor drives the pump to draw the liquid in the oil tank into the pump. The pump sends the liquid with pressure and flow into the P port of the valve group. By adjusting the overflow valve, the pressure and flow of the overflow hydraulic pressure from the T port are controlled. The throttle valve 2 controls the pressure and flow of the liquid going out of the A port, and the throttle valve 1 controls the pressure and flow of the liquid returning from the T1 port.

[0024] The liquid inlet of the P valve group (connected to the outlet of the pump), the outlet of the A valve group (connected to the inlet of the tested part), the return port of the B valve group (connected to the outlet of the tested part), the return port of the T / T1 port (connected to the oil tank), and the test port of the Ce port (connected to the pressure gauge to detect the pressure in the hydraulic pipeline). They have been explained in the notes of the attached figure.

[0025] The working principle of the device is as follows: the control box controls the rotation mode and speed of the motor, the motor drives the pump to rotate and send the liquid in the oil tank into the valve group P port, the overflow valve and throttle valve in the valve group control the flow and pressure entering the A port, and the flow meter and pressure gauge are installed in the pipeline to display the flow and pressure values ​​respectively, so as to realize the flow resistance and pressure test of hydraulic products. Figure 2 Shown

[0026] The function of the fuel tank: to store liquid;

[0027] The function of the pump: to provide liquid under pressure;

[0028] The function of the motor: drives the pump to rotate;

[0029] The function of bell housing + coupling: to ensure good torque transmission between motor and pump;

[0030] Function of the valve group: Control the liquid flow and pressure of the liquid outlet and return port;

[0031] Function of the control box: Control the rotation mode and speed of the motor;

[0032] The function of flow meter: to detect the flow in the pipeline;

[0033] The function of the pressure gauge: to detect the pressure in the pipeline.

[0034] The pump selection in this device strictly considers the compatibility of the medium (water-ethylene glycol mixture) and the minimum flow and pressure that can be provided;

[0035] Select high-precision valves, flow meters, and pressure gauges to achieve regulation and detection of flow and pressure within the measuring range.

Claims

1. A flow and pressure adjustable test device, comprising a fuel tank, a pump, a coupling, an air filter element, a control box, a motor and a valve group, characterized in that: In the flow and pressure adjustable test device, the oil tank includes a box body and a cover plate, the cover plate is located at the opening above the box body, the valve group, the control box and the air filter element are respectively fixed on the cover plate by screws, the motor and the pump are connected together by a coupling, the motor is located above the cover plate, the coupling is located below the cover plate, the coupling passes through the cover plate, the control box controls the forward and reverse direction and speed of the motor, the motor drives the pump to draw the liquid in the oil tank into the pump, and the pump sends the liquid with pressure and flow into the valve group; the outer periphery of the coupling is provided with a bell-shaped cover, and the bell-shaped cover is installed above the oil tank cover plate by screws; In the valve group, the liquid inlet of the valve group is connected to the outlet of the pump, which is the P port; the outlet of the valve group is connected to the inlet of the tested part, which is the A port; the return liquid port of the valve group is connected to the outlet of the tested part, which is the B port; the return liquid port is connected to the oil tank, which are the T port and the T1 port respectively; the test port is connected to the pressure gauge to detect the pressure in the hydraulic pipeline, which is the Ce port; an overflow valve is provided between the P port and the T port; a throttle valve 2 is provided between the A port and the P port; and a throttle valve 1 is provided between the B port and the T1 port; By adjusting the relief valve, the pressure and flow of the overflow hydraulic pressure from port T are controlled. Throttle valve 2 controls the pressure and flow of the liquid flowing out of port A. Throttle valve 1 controls the pressure and flow of the liquid returning from port T1. The control box controls the rotation mode and speed of the motor.

2. The flow rate and pressure adjustable test device according to claim 1 is characterized in that: The motor drives the pump to rotate and delivers the liquid in the oil tank to the P port of the valve group. The flow rate and pressure entering the A port are controlled by the overflow valve and throttle valve in the valve group. The pipeline is equipped with a flow meter and a pressure gauge to display the flow rate and pressure values ​​respectively, so as to realize the flow resistance and pressure test of the hydraulic product.

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