CN211042924U - Large container pressure test system - Google Patents

Abstract

The utility model discloses a large container pressure test system, comprising a hydraulic oil tank, a first pressure loading device and a second pressure loading device, wherein the oil inlets of the first pressure loading device and the second pressure loading device are connected to the hydraulic pressure The oil tank is connected, the oil outlet of the first pressure loading device and the second pressure loading device are both used for connecting with the oil inlet of the large container to be tested, and the displacement of the first pressure loading device is larger than the second pressure The displacement of the loading device, the loading pressure of the first pressure loading device is smaller than the loading pressure of the second pressure loading device. The large container pressure test system provided by the utility model integrates the advantages of the traditional low pressure test system and the high pressure test system, and can quickly and efficiently complete the high pressure test of the large container, the power consumption is relatively small, and the test cost is relatively low. .

Description

Large container pressure test system

technical field

The utility model belongs to the technical field of pressure resistance testing, in particular to a large container pressure resistance testing system.

Background technique

In the container pressure test system, the test plan is generally selected according to the pressure resistance value that the test system needs to achieve. For the low-pressure test system, gear pump or vane pump is generally selected as the loading power source, and the displacement of the gear pump or vane pump is determined according to the size of the container and the required test time. This is a relatively simple system. It can also show higher efficiency in the pressure test, but the test pressure value is lower. For the high-pressure test system, a feasible solution is to select the high-pressure plunger pump as the loading power source, and then determine the displacement of the plunger pump according to the size of the container and the required test time. When the container is large, the test time requirement is longer. In a short time, a larger displacement plunger pump must be selected to achieve this. The displacement and pressure of the plunger pump required by the entire system are large, so it needs to consume a lot of power. Another feasible solution is to select a gear pump as the loading power source, and amplify the loading pressure through a supercharger. The test efficiency of this solution is low, when a larger displacement gear pump and a large flow booster are selected When using a booster to improve the test efficiency, the power consumption of the entire system is relatively large, and the selected booster is expensive, resulting in high test costs.

To sum up, in the related art, a system that meets the efficiency requirements of the pressure-resistance test of a large container can achieve a lower test pressure value; a system that meets the high-pressure requirement of the pressure-resistance test of a large container has a lower efficiency, or meets the test efficiency The cost is high and the power consumption is large.

Utility model content

In order to solve at least one of the above technical problems, the present invention proposes a large container pressure test system.

The purpose of the present utility model is achieved through the following technical solutions:

A large container pressure test system is provided, including a hydraulic oil tank, a first pressure loading device and a second pressure loading device, wherein the oil inlets of the first pressure loading device and the second pressure loading device are all connected with the hydraulic oil tank, so the The oil outlet of the first pressure loading device and the second pressure loading device are both used to connect with the oil inlet of the large container to be tested, and the displacement of the first pressure loading device is larger than that of the second pressure loading device. The loading pressure of the first pressure loading device is smaller than the loading pressure of the second pressure loading device.

As a further improvement, an isolation check valve is also included, and the oil outlet of the first pressure loading device is connected to the oil inlet of the large container to be tested through the isolation check valve.

As a further improvement, the first pressure loading device includes a first oil pump and a first reversing valve, an oil inlet of the first oil pump is connected to a hydraulic oil tank, and the first reversing valve is arranged on the side of the first oil pump. Between the oil outlet, the inlet of the isolation check valve, and the hydraulic oil tank, the first reversing valve is used to switch and control the oil outlet of the first oil pump to be connected to the inlet of the isolation check valve or the hydraulic oil tank, respectively.

As a further improvement, the first pressure loading device includes a first relief valve, and the oil inlet and the relief port of the first relief valve are respectively connected to the oil outlet of the first oil pump and the hydraulic oil tank.

As a further improvement, the first pressure loading device includes a first pressure gauge, and the first pressure gauge is connected to the oil outlet of the first oil pump.

As a further improvement, the second pressure loading device includes a second oil pump, a second reversing valve and a hydraulic booster, an oil inlet of the second oil pump is connected to a hydraulic oil tank, and an outlet of the hydraulic booster It is used to connect with the oil inlet of the large container to be tested. The second reversing valve is arranged between the oil outlet of the second oil pump, the inlet of the hydraulic booster, and the hydraulic oil tank. The second reversing valve is used for The oil outlet of the second oil pump for switching control is respectively connected with the inlet of the hydraulic booster or the hydraulic oil tank.

As a further improvement, the second reversing valve is a three-position four-way M-type reversing valve, and the three-position four-way M-type reversing valve is provided with a pressure oil port, an oil return port, a first working oil port and The second working oil port, the pressure oil port is connected with the oil outlet of the second oil pump, the oil return port is connected with the hydraulic oil tank, the first working oil port and the second working oil port are connected with the hydraulic booster .

As a further improvement, the second pressure loading device includes a second relief valve, and the oil inlet and the relief port of the second relief valve are respectively connected to the oil outlet of the second oil pump and the hydraulic oil tank.

As a further improvement, the second pressure loading device includes a second pressure gauge, and the second pressure gauge is connected to the oil outlet of the second oil pump.

As a further improvement, a motor is also included, and the motor is drivingly connected to the first oil pump and the second oil pump at the same time.

The large container pressure test system provided by the utility model includes a hydraulic oil tank, a first pressure loading device and a second pressure loading device, and the oil inlets of the first pressure loading device and the second pressure loading device are all connected with the hydraulic oil tank , the oil outlet of the first pressure loading device and the second pressure loading device are both used to connect with the oil inlet of the large container to be tested, and the displacement of the first pressure loading device is larger than that of the second pressure loading device. The displacement of the first pressure loading device is smaller than the loading pressure of the second pressure loading device. The large container pressure test system provided by the utility model integrates the advantages of the traditional low pressure test system and the high pressure test system, and can quickly and efficiently complete the high pressure test of the large container, the power consumption is relatively small, and the test cost is relatively low. .

Description of drawings

The present invention will be further described by using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention. For those of ordinary skill in the art, under the premise of no creative work, the following drawings can also be used to obtain Additional drawings.

Fig. 1 is the hydraulic principle diagram of the large container pressure test system of the utility model in the standby state.

Fig. 2 is the hydraulic principle diagram of the large container pressure test system of the present invention under the state of low pressure liquid filling.

Fig. 3 is the hydraulic principle diagram of the large container pressure test system of the present invention in the state of high-pressure liquid filling.

Detailed ways

In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the The embodiments and features of the embodiments can be combined with each other.

1 to 3, an embodiment of the present invention provides a large container pressure test system, including a hydraulic oil tank 1, a first pressure loading device 2 and a second pressure loading device 3, the first pressure loading device 2. The oil inlet of the second pressure loading device 3 is connected to the hydraulic oil tank 1, and the oil outlet of the first pressure loading device 2 and the second pressure loading device 3 are used for the oil inlet of the large container 4 to be measured. port connection, the displacement of the first pressure loading device 2 is greater than the displacement of the second pressure loading device 3, and the loading pressure of the first pressure loading device 2 is smaller than the loading pressure of the second pressure loading device 3 .

In the above-mentioned embodiment of the present utility model, the oil pump of the first pressure loading device 2 can adopt a large displacement low pressure gear pump, which is used for liquid filling and exhausting of a large container, and the oil pump of the second pressure loading device 3 can adopt a small displacement low pressure gear pump Pump + booster or small displacement high pressure plunger pump for pressure test of large container. The output pressure of the first pressure loading device 2 is very low, but the output flow is very large, which can quickly fill the large container under test with hydraulic oil. The output flow of the second pressure loading device 3 is very small, but the output pressure is very high, which can realize the pressure loading, maintaining and unloading of the container under test. The large container pressure test system provided by the embodiment of the present utility model combines the advantages of the traditional low pressure test system and the high pressure test system, and can quickly and efficiently complete the high pressure test of the large container, and the power consumption is relatively small, and the test cost is low. relatively low.

As a further preferred embodiment, an isolation check valve 5 is also included, and the oil outlet of the first pressure loading device 2 is connected to the oil inlet of the large container to be measured 4 through the isolation check valve 5, and the isolation check valve 5 is provided. The valve 5 adopts a high pressure check valve, the inlet of the high pressure check valve is connected with the oil outlet of the first pressure loading device 2 , and the outlet of the high pressure check valve is connected with the oil inlet of the large container 4 to be measured. The function of the isolation check valve 5 is to separate the second pressure loading device 3 from the second pressure loading device 3 so as to avoid the influence of the high pressure of the second pressure loading device 3 on the first pressure loading device 2 when loading.

As a further preferred embodiment, the first pressure loading device 2 includes a first oil pump 21 and a first reversing valve 22, and the first oil pump 21 is a large-displacement low-pressure gear pump. The oil inlet of the first oil pump 21 is connected to the hydraulic oil tank 1, and the first reversing valve 22 is arranged between the oil outlet of the first oil pump 21, the inlet of the isolation check valve 5, and the hydraulic oil tank 1, so The first reversing valve 22 is used to switch and control the oil outlet of the first oil pump 21 to be connected to the inlet of the isolation check valve 5 or the hydraulic oil tank 1 respectively. Specifically, the first reversing valve 22 is a two-position four-way reversing valve, and the two-position four-way reversing valve is provided with a pressure oil port, an oil return port, a first working oil port, and a second working oil port , the pressure oil port is connected with the oil outlet of the first oil pump 21 , the oil return port is connected with the hydraulic oil tank 1 , and one of the first working oil port and the second working oil port is connected with the isolation check valve 5 The inlet is connected and the other is connected to hydraulic tank 1. When the first reversing valve 22 is switched to the left position, the oil outlet of the first oil pump 21 is connected to the inlet of the isolation check valve 5 through the first reversing valve 22. When the first reversing valve 22 is switched to the right position , the oil outlet of the first oil pump 21 is connected to the hydraulic oil tank 1 through the first reversing valve 22 to realize the unloading of the first oil pump 21 .

As a further preferred embodiment, the first pressure loading device 2 includes a first relief valve 23 , the oil inlet and relief port of the first relief valve 23 are respectively connected with the oil outlet, the relief port of the first oil pump 21 , and the Hydraulic tank 1 connection. The first pressure loading device 2 includes a first pressure gauge 24 , and the first pressure gauge 24 is connected to the oil outlet of the first oil pump 21 . The first relief valve 23 is used to protect the first oil pump 21 from exceeding the set pressure. The first pressure gauge 24 is used to display the output pressure value of the first oil pump 21 . When the predetermined pressure value is reached, the first reversing valve 22 can be controlled to change direction to unload the first oil pump 21 .

As a further preferred embodiment, the second pressure loading device 3 includes a second oil pump 31 , a second reversing valve 32 and a hydraulic booster 33 , and the second oil pump 31 adopts a low-cost small-displacement low-pressure gear The pump, the hydraulic booster 33 adopts a small-flow hydraulic booster. The hydraulic booster 33 is used to amplify the oil pressure output by the second oil pump 31. Selecting a booster 33 with an appropriate boost ratio can achieve different maximum Test pressure value. The oil inlet of the second oil pump 31 is connected to the hydraulic oil tank 1, the outlet of the hydraulic booster 33 is used to connect to the oil inlet of the large container 4 to be measured, and the second reversing valve 32 is arranged on the second oil pump Between the oil outlet of 31, the inlet of the hydraulic booster 33, and the hydraulic oil tank 1, the second reversing valve 32 is used to switch and control the oil outlet of the second oil pump 31 and the inlet or the inlet of the hydraulic booster 33, respectively. The hydraulic oil tank 1 is connected, and the oil output by the second oil pump 31 is amplified by the hydraulic pressure booster 33 .

As a further preferred embodiment, the second reversing valve 32 is a three-position four-way M-type reversing valve, and the three-position four-way M-type reversing valve is provided with a pressure oil port, an oil return port, a first working The oil port and the second working oil port, the pressure oil port is connected with the oil outlet of the second oil pump 31, the oil return port is connected with the hydraulic oil tank 1, the first working oil port and the second working oil port are connected with The hydraulic booster 33 is connected. The three-position four-way M-type reversing valve is provided with a pressure oil port, an oil return port, a first working oil port, and a second working oil port. The second reversing valve has the M-type function in the middle position. When the second reversing valve is switched to the neutral position, the pressure oil port and the oil return port are connected. At this time, the oil outlet of the second oil pump 31 is connected to the hydraulic oil tank 1 connected to realize the unloading of the second oil pump 31 .

As a further preferred embodiment, the second pressure loading device 3 includes a second relief valve 34 , and the oil inlet and relief port of the second relief valve 34 are respectively connected with the oil outlet and the relief port of the second oil pump 31 . Hydraulic tank 1 connection. The second pressure loading device 3 includes a second pressure gauge 35 , and the second pressure gauge 35 is connected to the oil outlet of the second oil pump 31 . The second relief valve 34 is used to protect the second oil pump 31 from exceeding the set pressure. The second pressure gauge 35 is used to display the output pressure value of the second oil pump 31 . When the predetermined pressure value is reached, the second reversing valve 32 can be controlled to change direction to unload the second oil pump 31 .

As a further preferred embodiment, a motor 6 is also included. The motor 6 is preferably an electric motor, and the motor 6 is drivingly connected to the first oil pump 21 and the second oil pump 31 at the same time. The motor 6 drives the first oil pump 21 and the second oil pump 31 to rotate at the same time. The oil inlets of the first oil pump 21 and the second oil pump 31 draw hydraulic oil from the hydraulic oil tank 1 and pass the first reversing valve 22 and the second oil pump 31. The reversing valve 32 controls the unloading of the first oil pump 21 and the second oil pump 31 respectively. In this way, two oil pumps are driven by a single motor 6, which is more economical and can reduce the cost of the testing system.

When using the large container pressure test system provided by the embodiment of the present invention to perform a high pressure test on the large container to be tested 4, the large container to be tested 4 is placed on the workbench 8, and a ball valve is installed at the oil discharge port of the large container to be tested 4 7 or screw plug, the oil inlet is connected to the outlet of the isolation check valve 5 and the outlet of the hydraulic booster 33, the oil inlet of the large container to be tested 4 is connected to the test pressure gauge 9, the motor 6 drives the first oil pump 21, the first oil pump The second oil pump 31 operates. In the standby state, the first reversing valve 22 is in the right position, the second reversing valve 32 is in the neutral position, and both the first oil pump 21 and the second oil pump 31 are in the unloading state, as shown in FIG. 1 . When the large container is filled with liquid at low pressure, the ball valve 7 is opened, the first reversing valve 22 is in the left position, the second reversing valve 32 is still in the neutral position, and the first oil pump 21 extracts the hydraulic oil in the hydraulic oil tank 1, And through the first reversing valve 22, the isolation check valve 5 is filled into the large container to be measured 4, and the air in the large container to be measured 4 is discharged through the ball valve 7, as shown in FIG. 2 . When the large container 4 to be tested is filled with hydraulic oil, the ball valve 7 is closed, the first reversing valve 22 is in the right position, the second reversing valve 32 is in the left position, and the second oil pump 31 extracts the hydraulic pressure in the hydraulic oil tank 1 The oil is filled into the large container 4 to be measured through the second reversing valve 32 and the hydraulic pressure booster 33 for pressure loading, as shown in FIG. 3 . When the test pressure gauge 9 shows that the loading pressure inside the large container 4 to be tested reaches the preset value, the second reversing valve 32 is switched to the neutral position, and the pressure of the large container to be tested 4 is maintained. After the withstand pressure test is completed, open the ball valve 7 to complete the pressure unloading.

In the above description, many specific details are set forth in order to fully understand the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, it should not be construed as a limitation on the protection scope of the present utility model.

In a word, although the present invention lists the above-mentioned preferred embodiments, it should be noted that although those skilled in the art can make various changes and modifications, unless such changes and modifications deviate from the scope of the present invention, they should include within the scope of protection of the present invention.

Claims (10)

1. The large container pressure resistance testing system is characterized by comprising a hydraulic oil tank (1), a first pressure loading device (2) and a second pressure loading device (3), oil inlets of the first pressure loading device (2) and the second pressure loading device (3) are connected with the hydraulic oil tank (1), oil outlets of the first pressure loading device (2) and the second pressure loading device (3) are used for being connected with an oil inlet of a large container (4) to be tested, the discharge capacity of the first pressure loading device (2) is larger than that of the second pressure loading device (3), and the loading pressure of the first pressure loading device (2) is smaller than that of the second pressure loading device (3).

2. The large vessel pressure resistance test system according to claim 1, wherein: the oil outlet of the first pressure loading device (2) is connected with the oil inlet of the large container (4) to be tested through the isolation one-way valve (5).

3. The large vessel pressure resistance test system according to claim 2, wherein: the first pressure loading device (2) comprises a first oil pump (21) and a first reversing valve (22), an oil inlet of the first oil pump (21) is connected with the hydraulic oil tank (1), the first reversing valve (22) is arranged between an oil outlet of the first oil pump (21), an inlet of the isolating one-way valve (5) and the hydraulic oil tank (1), and the first reversing valve (22) is used for switching and controlling the oil outlet of the first oil pump (21) to be connected with the inlet of the isolating one-way valve (5) or the hydraulic oil tank (1) respectively.

4. The large vessel pressure withstanding testing system of claim 3 wherein: the first pressure loading device (2) comprises a first overflow valve (23), and an oil inlet and an overflow port of the first overflow valve (23) are respectively connected with an oil outlet of the first oil pump (21) and the hydraulic oil tank (1).

5. The large vessel pressure withstanding testing system of claim 3 wherein: the first pressure loading device (2) comprises a first pressure gauge (24), and the first pressure gauge (24) is connected with an oil outlet of the first oil pump (21).

6. The large vessel pressure withstanding testing system of claim 3 wherein: the second pressure loading device (3) comprises a second oil pump (31), a second reversing valve (32) and a hydraulic pressure booster (33), an oil inlet of the second oil pump (31) is connected with the hydraulic oil tank (1), an outlet of the hydraulic pressure booster (33) is used for being connected with an oil inlet of a large container (4) to be tested, the second reversing valve (32) is arranged between an oil outlet of the second oil pump (31), an inlet of the hydraulic pressure booster (33) and the hydraulic oil tank (1), and the second reversing valve (32) is used for switching and controlling the oil outlet of the second oil pump (31) to be connected with the inlet of the hydraulic pressure booster (33) or the hydraulic oil tank (1) respectively.

7. The large vessel pressure resistance test system according to claim 6, wherein: the second reversing valve (32) is a three-position four-way M-shaped reversing valve, the three-position four-way M-shaped reversing valve is provided with a pressure oil port, an oil return port, a first working oil port and a second working oil port, the pressure oil port is connected with an oil outlet of the second oil pump (31), the oil return port is connected with the hydraulic oil tank (1), and the first working oil port and the second working oil port are connected with the hydraulic supercharger (33).

8. The large vessel pressure resistance test system according to claim 6, wherein: the second pressure loading device (3) comprises a second overflow valve (34), and an oil inlet and an overflow port of the second overflow valve (34) are respectively connected with an oil outlet of the second oil pump (31) and the hydraulic oil tank (1).

9. The large vessel pressure resistance test system according to claim 6, wherein: the second pressure loading device (3) comprises a second pressure gauge (35), and the second pressure gauge (35) is connected with an oil outlet of the second oil pump (31).

10. The large vessel pressure resistance test system according to any one of claims 6 to 9, wherein: the oil pump further comprises a motor (6), and the motor (6) is simultaneously in driving connection with the first oil pump (21) and the second oil pump (31).

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