Hydraulic oil tank with multi-stage filtering function

Abstract

The utility model relates to the technical field of hydraulic oil tanks, in particular to a hydraulic oil tank with multistage filtering, which comprises an oil tank body, an oil storage cavity is arranged in the oil tank body, an oil return port communicated with the oil storage cavity is arranged on the upper side of the oil tank body, and a first filter is mounted in the oil return port. An oil outlet communicated with the oil storage cavity is formed in the position, close to the bottom, of the side face of the oil tank body. One end, arranged in the oil storage cavity, of the oil outlet pipe is connected with a second filter; a third filter is installed on the upper side of the oil tank body, an access port of the third filter is used for being connected with the oil outlet end of the hydraulic pump, and compared with a single filter, the hydraulic oil tank can filter multiple links, the quality of hydraulic oil is improved, and the situation that hydraulic equipment under test is damaged due to the quality problem of the hydraulic oil is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic oil tanks, and particularly relates to a hydraulic oil tank with multi-stage filtration. Background Art

[0002] In addition to being a device for storing hydraulic oil during the normal use of hydraulic equipment, a hydraulic oil tank is required for running-in tests or sealing tests before the hydraulic equipment leaves the factory. For example, various equipment such as hydraulic cylinders and hydraulic steering mechanisms need to undergo sealing tests before being put into use to ensure that the device or component can function properly when put into use.

[0003] Currently, when conducting sealing tests, most use some test benches to test the sealing performance of hydraulic equipment. The test bench is connected to the oil outlet and inlet of the hydraulic equipment, and hydraulic oil is introduced into the hydraulic equipment to drive the hydraulic equipment to simulate the situation during its use, so as to determine whether there is any leakage in the hydraulic equipment.

[0004] Compared with the hydraulic oil tank used in the normal operation of hydraulic equipment, the hydraulic oil tank used as a test bench needs to continuously supply hydraulic oil to different hydraulic equipment. Since impurities generated during the processing of the hydraulic equipment are inevitably brought back by the hydraulic oil after circulating in the hydraulic equipment. Therefore, most hydraulic oil tanks use some filters to filter the hydraulic oil. However, in the prior art, most hydraulic oil tanks only set a single filter at the oil inlet or outlet for filtration. Although this can perform preliminary filtration, for the hydraulic oil tank used as a test bench, due to its high frequency and operation with different hydraulic equipment, the impurity content in the hydraulic oil will be much higher than that when used in combination with normal hydraulic equipment. Moreover, since impurities may be generated in various parts during the operation of the entire test system, such as hydraulic pumps, inside the oil tank, and the hydraulic equipment being tested, using a single filter to filter the hydraulic oil can only filter a certain link. For example, if installed at the oil inlet, it can only filter the hydraulic oil entering the oil tank, and it is difficult to filter the impurities generated inside the hydraulic oil tank and during the pumping process of the hydraulic pump. If only filtering at the oil outlet, then the impurities accumulated in the hydraulic oil tank will become more and more, making it very troublesome to clean. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a hydraulic oil tank with multi-stage filtration, so as to solve the problem that it is difficult to achieve a good filtration effect by using a single filter for the hydraulic oil tank used as a test bench in the prior art.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A hydraulic oil tank with multi-stage filtration, comprising an oil tank body. A storage cavity is arranged inside the oil tank body. An oil return port communicating with the storage cavity is arranged on the upper side of the oil tank body. A first filter is installed in the oil return port. An oil outlet communicating with the storage cavity is arranged at a position near the bottom on the side of the oil tank body. An oil outlet pipe is installed in the oil outlet, and one end of the oil outlet pipe placed in the storage cavity is connected with a second filter. A third filter is installed on the upper side of the oil tank body, and the connection port of the third filter is used to connect the oil outlet end of a hydraulic pump.

[0008] A further technical solution is that a partition board is arranged in the storage cavity. The opposite two sides of the partition board are respectively connected with the opposite two side walls of the storage cavity. There are gaps between the upper side and the lower side of the partition board and the upper cavity wall and the lower cavity wall of the storage cavity respectively. The first filter and the second filter are respectively placed on both sides of the partition board in the storage cavity.

[0009] A further technical solution is that a liquid level gauge for detecting the oil quantity in the storage cavity is installed on the side of the oil tank body.

[0010] A further technical solution is that the liquid level gauge includes a display tube. The display tube is vertically installed on the side of the oil tank body. A first communication pipe and a second communication pipe are respectively arranged at positions near the top and the bottom of the display tube. One ends of the first communication pipe and the second communication pipe far away from the display tube penetrate into the storage cavity.

[0011] A further technical solution is that an oil filling port communicating with the storage cavity and a plug for closing the oil filling port are arranged on the upper side of the oil tank body. A drain pipe communicating with the storage cavity is arranged on the lower side of the oil tank body, and a ball valve for controlling the on-off is arranged on the drain pipe.

[0012] A further technical solution is that support plates are vertically installed on the opposite two sides of the lower side of the oil tank body. Connecting plates are horizontally installed on the lower sides of the two support plates. Fixing holes penetrating the upper and lower sides are arranged on the connecting plates. An installation hole penetrating the two sides is arranged on the side of one of the support plates, and the lower end of the drain pipe passes through the installation hole.

[0013] A further technical solution is that reinforcing ribs are arranged between the support plates and the connecting plates.

[0014] A further technical solution is that a communication hole communicating with the storage cavity is arranged at a position near the upper side on the side of the oil tank body. A detection pipe is installed in the communication hole. One end of the detection pipe is placed outside the oil tank body and is detachably installed with a sealing cover for closing the end. The other end of the detection pipe bends downward and extends to a position near the bottom of the storage cavity.

[0015] A further technical solution is that a pressure gauge for detecting the pressure in the storage cavity is installed on the top of the oil tank body.

[0016] Compared with the prior art, the utility model has at least one of the following beneficial effects: 1. By providing a first filter, when the hydraulic oil enters the oil storage cavity through the oil return pipeline, it can be filtered by the first filter, improving the quality of the hydraulic oil stored in the oil storage cavity; 2. By providing a second filter, when the hydraulic pump extracts hydraulic oil from the oil storage cavity, it will be filtered by the second filter, which can avoid reducing the probability of impurities entering the hydraulic pump; 3. By providing a third filter, it can be filtered by the third filter before the hydraulic oil is pumped into the oil supply pipeline by the hydraulic pump; 4. Compared with a single filter, the utility model can filter multiple links, improving the quality of the hydraulic oil and avoiding damage to the hydraulic equipment being tested due to problems with the quality of the hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 FIG. is an overall schematic diagram of a hydraulic oil tank with multi-stage filtration according to the utility model.

[0018] Figure 2 FIG. is a side schematic diagram of a hydraulic oil tank with multi-stage filtration according to the utility model.

[0019] Figure 3 FIG. is a front schematic diagram of a hydraulic oil tank with multi-stage filtration according to the utility model.

[0020] Figure 4 FIG. is a side sectional schematic diagram of a hydraulic oil tank with multi-stage filtration according to the utility model.

[0021] Figure 5 FIG. is an internal schematic diagram of a hydraulic oil tank with multi-stage filtration according to the utility model.

[0022] Reference numerals: 1 - oil tank body, 2 - oil storage cavity, 3 - oil return port, 4 - first filter, 5 - oil outlet, 6 - oil outlet pipe, 7 - second filter, 8 - third filter, 9 - partition plate, 10 - liquid level gauge, 11 - display tube, 12 - first connecting pipe, 13 - second connecting pipe, 14 - fuel filling port, 15 - plug, 16 - drain pipe, 17 - support plate, 18 - connecting plate, 19 - mounting hole, 20 - fixing hole, 21 - reinforcing rib, 22 - communication hole, 23 - detection tube, 24 - pressure gauge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to make the objectives, technical solutions and advantages of the utility model more clear and understandable, the following further details the utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0024] Figures 1 to 5 The following shows an embodiment of the utility model.

[0025] Example 1:

[0026] Figure 1 , Figure 5 As shown in the figure, a hydraulic oil tank with multi-stage filtration includes a tank body 1. A storage cavity 2 is arranged inside the tank body 1. An oil return port 3 communicating with the storage cavity 2 is arranged on the upper side of the tank body 1. A first filter 4 is installed in the oil return port 3. An oil outlet 5 communicating with the storage cavity 2 is arranged at a position near the bottom on the side of the tank body 1. An oil outlet pipe 6 is installed in the oil outlet 5. One end of the oil outlet pipe 6 placed in the storage cavity 2 is connected with a second filter 7. A third filter 8 is installed on the upper side of the tank body 1. The access port of the third filter 8 is used to connect to the oil outlet end of the hydraulic pump. By setting the first filter 4, when the hydraulic oil enters the storage cavity 2 through the oil return pipeline, it can be filtered by the first filter 4, improving the quality of the hydraulic oil stored in the storage cavity 2. By setting the second filter 7, when the hydraulic pump extracts the hydraulic oil from the storage cavity 2, it will be filtered by the second filter 7, which can avoid reducing the probability of impurities entering the hydraulic pump. By setting the third filter 8, it can filter the hydraulic oil through the third filter 8 before the hydraulic oil is pumped into the oil supply pipeline by the hydraulic pump. Compared with a single filter, the utility model can filter multiple links, improve the quality of the hydraulic oil, and avoid damaging the hydraulic equipment under test due to the quality problem of the hydraulic oil.

[0027] Example 2:

[0028] On the basis of Example 1, as Figure 4 , a partition 9 is arranged in the storage cavity 2. The opposite sides of the partition 9 are respectively connected to the opposite side walls of the storage cavity 2. There are gaps between the upper and lower sides of the partition 9 and the upper and lower cavity walls of the storage cavity 2 respectively. The first filter 4 and the second filter 7 are respectively placed on both sides of the partition 9 in the storage cavity 2. By setting the partition 9, the liquid flow generated when the hydraulic oil enters the storage cavity 2 can be reduced, so that the hydraulic oil entering the storage cavity 2 will not affect the pumping of the hydraulic oil out of the storage cavity 2 through the second filter 7. There are gaps between the partition 9 and the upper and lower cavity walls of the storage cavity 2, which can make the hydraulic oil at the bottom of the storage cavity 2 communicate with each other, and the air at the upper part of the storage cavity 2 communicate with each other, thus avoiding the liquid level difference of the hydraulic oil on both sides of the partition 9.

[0029] Example 3:

[0030] On the basis of the foregoing embodiments, as Figure 2 , Figure 5As shown in the figure, a liquid level gauge 10 for detecting the oil quantity in the oil storage cavity 2 is installed on the side of the oil tank body 1. By setting the liquid level gauge 10, the depth of the hydraulic oil in the oil storage cavity 2 can be monitored, avoiding the situation that the pumping volume of the hydraulic oil pump is insufficient due to the gradual reduction of the hydraulic oil during use. Since the oil tank body 1 of the present utility model is mainly used for a test device, when the test device is connected to the hydraulic equipment under test, it is inevitable that hydraulic oil leaks from the connection. Over time, the hydraulic oil in the oil storage cavity 2 will gradually decrease.

[0031] The liquid level gauge 10 includes a display tube 11, and the display tube 11 is vertically installed on the side of the oil tank body 1. The first communication pipe 12 and the second communication pipe 13 are respectively arranged at the positions near the top and bottom of the display tube 11. The ends of the first communication pipe 12 and the second communication pipe 13 far away from the display tube 11 penetrate into the oil storage cavity 2. With such a setting, by means of the cooperation of the display tube 11, the first communication pipe 12 and the second communication pipe 13, a communicating vessel effect is formed with the oil storage cavity 2, so that the hydraulic oil in the display tube 11 and the hydraulic oil in the oil storage cavity 2 are at the same height, and thus it is very convenient to check the depth of the hydraulic oil in the oil storage cavity 2.

[0032] An oil filling port 14 communicating with the oil storage cavity 2 and a plug 15 for closing the oil filling port 14 are arranged on the upper side of the oil tank body 1; a drain pipe 16 communicating with the oil storage cavity 2 is arranged on the lower side of the oil tank body 1, and a ball valve for controlling the on-off is arranged on the drain pipe 16. By setting the oil filling port 14, it is convenient to supplement the hydraulic oil in the oil storage cavity 2. By setting the plug 15, the oil filling port 14 can be sealed, so that the oil storage cavity 2 is in a sealed state. By setting the drain pipe 16, when the quality of the hydraulic oil deteriorates to the point where it cannot be used, the hydraulic oil can be discharged through the drain pipe 16, or when the oil storage cavity 2 needs to be repaired, the hydraulic oil can be discharged through the drain pipe 16. By setting the ball valve, it can be avoided that the hydraulic oil leaks through the drain pipe 16 during the normal use of the oil tank body 1.

[0033] Embodiment 4:

[0034] On the basis of the foregoing embodiments, as Figure 3 shown, support plates 17 are vertically installed on the opposite sides of the lower side of the oil tank body 1. Connecting plates 18 are horizontally installed on the lower sides of the two support plates 17, and fixing holes 20 penetrating through the upper and lower sides are arranged on the connecting plates 18; an installation hole 19 penetrating through both sides is arranged on the side of one of the support plates 17, and the lower end of the drain pipe 16 passes through the installation hole 19. By setting the support plates 17 and the connecting plates 18, the oil tank body 1 can be fixed to other mounting seats, and the fixing bolts are passed through the fixing holes 20 to be fixedly connected with the mounting seats.

[0035] Reinforcing ribs 21 are provided between the support plate 17 and the connecting plate 18. By providing the reinforcing ribs 21, the strength between the support plate 17 and the connecting plate 18 can be improved. Through the cooperation of the reinforcing ribs 21, the support plate 17 and the connecting plate 18, a good supporting force can be provided for the fuel tank body 1.

[0036] A communication hole 22 communicating with the oil storage cavity 2 is provided at a position near the upper side of the side surface of the fuel tank body 1. A detection tube 23 is installed in the communication hole 22. One end of the detection tube 23 is placed outside the fuel tank body 1, and a sealing cover for closing the end is detachably installed. The other end of the detection tube 23 bends downward and extends to a position near the bottom of the oil storage cavity 2. By providing the detection tube 23, some detection probes can be inserted into the oil storage cavity 2 through the detection tube 23 to detect the quality of the hydraulic oil at the bottom of the oil storage cavity 2 and some deposits generated at the bottom of the oil storage cavity 2. This is conducive to monitoring the quality of the hydraulic oil at any time, so as to replace the hydraulic oil according to requirements.

[0037] A pressure gauge 24 for detecting the pressure in the oil storage cavity 2 is installed on the top of the fuel tank body 1. By providing the pressure gauge 24, the pressure in the oil storage cavity 2 can be detected, which is convenient for the operator to handle the situation of excessive or insufficient pressure in time.

[0038] Although the present invention has been described herein with reference to multiple illustrative embodiments of the present invention, it should be understood that those skilled in the art can design many other modifications and embodiments that will fall within the scope of the principles and spirit disclosed in this application. More specifically, within the scope of the disclosure, the drawings, and the claims of this application, various variations and improvements can be made to the components and / or layout of the subject combination layout. In addition to the variations and improvements made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A hydraulic oil tank with multi-stage filtration, comprising an oil tank body (1), characterized in that, A storage cavity (2) is provided inside the fuel tank body (1). An oil return port (3) communicating with the storage cavity (2) is provided on the upper side of the fuel tank body (1). A first filter (4) is installed in the oil return port (3). An oil outlet (5) communicating with the storage cavity (2) is provided at a position near the bottom on the side of the fuel tank body (1). An oil outlet pipe (6) is installed in the oil outlet (5). One end of the oil outlet pipe (6) placed inside the storage cavity (2) is connected with a second filter (7). A third filter (8) is installed on the upper side of the fuel tank body (1). The connection port of the third filter (8) is used to connect the oil outlet end of a hydraulic pump.

2. The hydraulic oil tank with multi-stage filtration according to claim 1, characterized in that: A partition plate (9) is provided inside the storage cavity (2). The opposite sides of the partition plate (9) are respectively connected to the opposite side walls of the storage cavity (2). There are gaps between the upper side and the lower side of the partition plate (9) and the upper cavity wall and the lower cavity wall of the storage cavity (2) respectively. The first filter (4) and the second filter (7) are respectively placed on both sides of the partition plate (9) inside the storage cavity (2).

3. The hydraulic oil tank with multi-stage filtration according to claim 1, characterized in that: A liquid level gauge (10) for detecting the oil quantity inside the storage cavity (2) is installed on the side of the fuel tank body (1).

4. A hydraulic oil tank with multi-stage filtration according to claim 3, characterized in that: The liquid level gauge (10) includes a display tube (11). The display tube (11) is vertically installed on the side of the fuel tank body (1). A first connecting pipe (12) and a second connecting pipe (13) are respectively provided at positions near the top and the bottom of the display tube (11). One ends of both the first connecting pipe (12) and the second connecting pipe (13) far away from the display tube (11) penetrate into the storage cavity (2).

5. A hydraulic oil tank with multi-stage filtration according to claim 1, characterized in that: A fuel filling port (14) communicating with the storage cavity (2) and a plug (15) for closing the fuel filling port (14) are provided on the upper side of the fuel tank body (1). A drain pipe (16) communicating with the storage cavity (2) is provided on the lower side of the fuel tank body (1). A ball valve for controlling the on-off is provided on the drain pipe (16).

6. The hydraulic oil tank with multi-stage filtration according to claim 5, characterized in that: Support plates (17) are vertically installed on the opposite sides of the lower side of the fuel tank body (1). Connecting plates (18) are horizontally installed on the lower sides of both the support plates (17). Fixing holes (20) penetrating the upper and lower sides are provided on the connecting plates (18). An installation hole (19) penetrating both sides is provided on the side of one of the support plates (17). The lower end of the drain pipe (16) passes through the installation hole (19).

7. The hydraulic oil tank with multi-stage filtration according to claim 6, characterized in that: Reinforcing ribs (21) are provided between the support plates (17) and the connecting plates (18).

8. A hydraulic oil tank with multi-stage filtration according to claim 1, characterized in that: A communication hole (22) communicating with the storage cavity (2) is provided at a position near the upper side on the side of the fuel tank body (1). A detection pipe (23) is installed in the communication hole (22). One end of the detection pipe (23) is placed outside the fuel tank body (1), and a sealing cover for closing the end is detachably installed. The other end of the detection pipe (23) bends downward and extends to a position near the bottom of the storage cavity (2).

9. A hydraulic oil tank with multi-stage filtration according to claim 1, characterized in that: A pressure gauge (24) for detecting the pressure inside the storage cavity (2) is installed on the top of the fuel tank body (1).

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