Cylinder barrel test oil suction device

Abstract

The utility model discloses an oil suction device for a cylinder test, which relates to the technical field of oil cylinder tests and is characterized by comprising an oil pumping tank, a first oil inlet pipeline and a second oil inlet pipeline are arranged on the oil pumping tank, and a first electromagnetic valve and a second electromagnetic valve are arranged on the first oil inlet pipeline and the second oil inlet pipeline. An oil receiving tank is arranged on the upper side of the oil pumping tank, one side of the oil receiving tank is connected with a vacuum pump, a first oil pumping pipeline and a second oil pumping pipeline which are used for communicating the first oil inlet pipeline and the second oil inlet pipeline are arranged on the oil receiving tank, and a third electromagnetic valve and a fourth electromagnetic valve are arranged on the first oil pumping pipeline and the second oil pumping pipeline. According to the device, the oil pumping mechanism capable of pumping oil in the double-acting oil cylinder after the test is integrally assembled on the oil supply mechanism for carrying out the pressure test on the double-acting oil cylinder, so that the oil in the double-acting oil cylinder can be conveniently pumped after the pressure test is carried out; and the problem of pollution caused by subsequent overflow leakage due to excessive oil residue is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oil cylinder testing, in particular to an oil suction device for cylinder barrel testing. Background Art

[0002] A double-acting cylinder is a hydraulic actuator whose piston can be driven in two directions by the pressure of hydraulic oil. In a double-acting cylinder, there are oil chambers at both ends of the piston. Oil can be introduced into either side of the piston to push it to move the hydraulic cylinder in opposite directions. To ensure the quality of the cylinder, the cylinder body needs to be pressure tested. Specifically, oil is injected into the cylinders on both sides so that the internal oil pressure reaches a certain level and lasts for a period of time, and then the pressure-maintaining effect is tested. After the oil pressure test, due to the large amount of residual oil in the cylinder body, this oil is difficult to handle, resulting in oil leakage during product transportation, causing pollution to the outer packaging, which is not conducive to product sales.

[0003] The above contents are only used to assist in understanding the technical solution of the present utility model, and do not constitute an admission that the above contents are the closest prior art. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings and provide a cylinder test oil suction device.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A cylinder test oil suction device comprises an oil pump box with an oil pump arranged inside, the oil pump box is provided with a first oil inlet pipe and a second oil inlet pipe respectively used for connecting the oil inlet holes at both ends of a double-acting oil cylinder, the first oil inlet pipe and the second oil inlet pipe are also respectively provided with a first solenoid valve and a second solenoid valve for controlling opening and closing, an oil receiving box isolated from each other is arranged on the upper side of the oil pump box, a vacuum pump is connected to one side of the oil receiving box, the oil receiving box is provided with a first oil extraction pipe and a second oil extraction pipe for connecting the first oil inlet pipe and the second oil inlet pipe, and the first oil extraction pipe and the second oil extraction pipe are respectively provided with a third solenoid valve and a fourth solenoid valve for controlling opening and closing.

[0007] Furthermore, the oil receiving box is provided with an electric contact pressure gauge for detecting the internal pressure of the oil receiving box and electrically connected to the vacuum pump.

[0008] Furthermore, an oil return pipeline is provided between the oil receiving tank and the pump oil tank, and a manual valve for controlling opening and closing is provided on the oil return pipeline.

[0009] Furthermore, the first oil inlet pipeline and the second oil inlet pipeline are respectively provided with air supply valves for one-way air intake into the pipeline.

[0010] Furthermore, the air supply valve includes a valve body connected to the first oil inlet pipeline and the second oil inlet pipeline, a fixed frame arranged in the valve body, a limiting rod arranged on the fixed frame, a plug slidably sleeved on the limiting rod, and a spring sleeved on the limiting rod and connected to the fixed frame at one end and the plug at the other end; an air inlet is opened at the upper end of the valve body, and the plug can seal the air inlet.

[0011] Furthermore, the plug is in the shape of a truncated cone, the lower end of the air inlet is in the shape of a truncated cone adapted to the plug, and the upper end is in the shape of a cylinder with the same diameter as the top surface of the truncated cone at the lower end.

[0012] Compared with the prior art, the beneficial effect of the present solution is that the present device integrates an oil extraction mechanism which can extract the oil inside the double-acting cylinder after the test on the oil supply mechanism for the pressure test of the double-acting cylinder, so that the oil inside the double-acting cylinder can be easily extracted after the pressure test, thus avoiding the problem of pollution caused by subsequent leakage due to excessive oil residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0014] Figure 1 It is a front three-dimensional schematic diagram of the utility model;

[0015] Figure 2 It is a side perspective schematic diagram of the utility model;

[0016] Figure 3 It is a front view schematic diagram of the utility model;

[0017] Figure 4 It is a cross-sectional stereoscopic schematic diagram of the air supply valve in the utility model.

[0018] In the figure: 1. Pump oil tank; 11. Double-acting cylinder; 12. First oil inlet pipeline; 13. Second oil inlet pipeline; 14. First solenoid valve; 15. Second solenoid valve; 2. Oil connecting tank; 21. Vacuum pump; 22. First oil extraction pipeline; 23. Second oil extraction pipeline; 24. Third solenoid valve; 25. Fourth solenoid valve; 3. Electric contact pressure gauge; 4. Oil return pipeline; 41. Manual valve; 5. Air supply valve; 51. Valve body; 52. Fixed bracket; 53. Limit rod; 54. Plug; 55. Spring; 56. Air inlet. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. In the absence of conflict, the embodiments in this application and the features in the embodiments can be combined with each other. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] like Figure 1-4 A cylinder test oil suction device shown in the figure includes an oil pump box 1 with an oil pump arranged inside, the oil pump box 1 is provided with a first oil inlet pipe 12 and a second oil inlet pipe 13 respectively used for connecting the oil inlet holes at both ends of the double-acting oil cylinder 11, the first oil inlet pipe 12 and the second oil inlet pipe 13 are also provided with a first solenoid valve 14 and a second solenoid valve 15 for controlling the opening and closing, respectively, an oil receiving box 2 isolated from the pump oil box 1 is provided on the upper side, a vacuum pump 21 is connected to one side of the oil receiving box 2, the oil receiving box 2 is provided with a first oil extraction pipe 22 and a second oil extraction pipe 23 for connecting the first oil inlet pipe 12 and the second oil inlet pipe 13, the first oil extraction pipe 22 and the second oil extraction pipe 23 are respectively provided with a third solenoid valve 24 and a fourth solenoid valve 25 for controlling the opening and closing.

[0021] When the device is conducting a pressure test, the third solenoid valve 24 and the fourth solenoid valve 25 are first closed, and the first solenoid valve 14 and the second solenoid valve 15 are opened, and oil is pumped to the oil inlets on both sides of the double-acting cylinder 11 respectively to perform a pressure test on it. When the test is completed, the first solenoid valve 14 and the second solenoid valve 15 are closed, and the third solenoid valve 24 or the fourth solenoid valve 25 is opened accordingly, and the vacuum pump 21 is started to allow the vacuum pump 21 to extract air from the oil receiving box 2 to increase the internal negative pressure, and the negative pressure is used to suck the oil inside the double-acting cylinder 11 through the first oil extraction pipeline 22 or the second oil extraction pipeline 23 and store it in the oil receiving box 2, completing the cleaning of the residual oil after the test. It should be noted that the device can also be applied to single-acting cylinders, and only the first oil inlet pipeline 12 or the second oil inlet pipeline 13 needs to be connected to the oil inlet hole. It has a wide range of applicability and is easy to put into production.

[0022] In one embodiment, an electric contact pressure gauge 3 for detecting the internal pressure of the oil receiving tank 2 and electrically connected to the vacuum pump 21 is provided on the oil receiving tank 2. Through the setting of the electric contact pressure gauge 3, it can detect the negative pressure in the oil receiving tank 2. When the internal negative pressure meets a certain value, it feeds back a signal to the vacuum pump 21, so that the vacuum pump 21 automatically stops working, thereby achieving the effect of saving energy.

[0023] In one embodiment, an oil return pipe 4 is provided between the oil receiving tank 2 and the pump oil tank 1, and a manual valve 41 for controlling the opening and closing is provided on the oil return pipe 4. The overall device completes a single test process through the above-mentioned oil pumping and oil extraction methods. When the test is implemented multiple times, most of the oil in the pump oil tank 1 will be transferred to the interior of the oil receiving tank 2. Then, by providing the oil return pipe 4, when the oil storage in the oil receiving tank 2 reaches a certain value, the manual valve 41 can be manually opened to send the oil back to the pump oil tank 1, thereby achieving the effect of oil recycling.

[0024] In one embodiment, the first oil inlet pipeline 12 and the second oil inlet pipeline 13 are respectively provided with an air supply valve 5 for one-way air intake into the pipeline, the air supply valve 5 includes a valve body 51 connected to the first oil inlet pipeline 12 and the second oil inlet pipeline 13, a fixing frame 52 arranged in the valve body 51, a limiting rod 53 arranged on the fixing frame 52, a plug 54 slidably sleeved on the limiting rod 53, and a spring 55 sleeved on the limiting rod 53 and connected to the fixing frame 52 at one end and the plug 54 at the other end; an air inlet 56 is opened at the upper end of the valve body 51, and the plug 54 can block the air inlet 56, the plug 54 is in a truncated cone shape, the lower end of the air inlet 56 is in a truncated cone shape adapted to the plug 54, and the upper end is in a cylindrical shape with the same diameter as the top surface of the lower end truncated cone, and the truncated cone shape ensures the stability of the seal, so as to ensure that the vacuum pump 21 can quickly transfer the oil in the process of pumping oil, and then respectively in the first oil inlet pipeline 12 and the second oil inlet pipeline 13 The air supply valve 5 is set on the top, and the air supply valve 5 only supplies air to the pipeline side. When oil is extracted through the oil inlet hole on one side of the double-acting oil cylinder 11, the air supply valve 5 on the pipeline connected to the oil inlet hole on the other side will open for air supply. The specific process is that the negative pressure inside the air supply valve 5 increases, and the plug 54 is attracted downward, thereby opening the air inlet 56, and then filling the first oil inlet pipeline 12 or the second oil inlet pipeline 13 with air, so that the piston moves quickly toward the oil extraction side to accelerate the oil extraction work. When the suction is completed or the oil pumping work is in progress, the plug 54 will rebound under the action of the spring 55 and the positive pressure in the pipeline to block the air inlet 56 to achieve the effect of one-way air supply. It should be noted that the suction speed of the vacuum pump 21 is much greater than the air supply speed of the air supply valve 5, so that the negative pressure in the oil receiving box 2 always maintains a trend of increasing during the oil extraction process, thereby ensuring that the electric contact pressure gauge 3 can be detected normally.

[0025] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention.

Claims

1. A cylinder test oil suction device, comprising an oil pump box (1) with an oil pump inside, the oil pump box (1) is provided with a first oil inlet pipeline (12) and a second oil inlet pipeline (13) for connecting to the oil inlet holes at both ends of a double-acting oil cylinder (11), the first oil inlet pipeline (12) and the second oil inlet pipeline (13) are also provided with a first solenoid valve (14) and a second solenoid valve (15) for controlling opening and closing, respectively, characterized in that: An oil receiving box (2) isolated from the pump oil box (1) is arranged on the upper side thereof, a vacuum pump (21) is connected to one side of the oil receiving box (2), a first oil extraction pipeline (22) and a second oil extraction pipeline (23) for connecting the first oil inlet pipeline (12) and the second oil inlet pipeline (13) are arranged on the oil receiving box (2), and a third solenoid valve (24) and a fourth solenoid valve (25) for controlling opening and closing are respectively arranged on the first oil extraction pipeline (22) and the second oil extraction pipeline (23).

2. The cylinder test oil suction device according to claim 1, characterized in that: The oil receiving box (2) is provided with an electric contact pressure gauge (3) for detecting the internal pressure of the oil receiving box (2) and electrically connected to the vacuum pump (21).

3. The cylinder test oil suction device according to claim 1, characterized in that: An oil return pipeline (4) is provided between the oil receiving tank (2) and the pump oil tank (1), and a manual valve (41) for controlling opening and closing is provided on the oil return pipeline (4).

4. The cylinder test oil suction device according to any one of claims 1 to 3, characterized in that: The first oil inlet pipeline (12) and the second oil inlet pipeline (13) are also respectively provided with an air supply valve (5) for one-way air intake into the pipeline.

5. The cylinder test oil suction device according to claim 4, characterized in that: The air supply valve (5) comprises a valve body (51) connected to a first oil inlet pipeline (12) and a second oil inlet pipeline (13), a fixing frame (52) arranged in the valve body (51), a limiting rod (53) arranged on the fixing frame (52), a plug (54) slidably sleeved on the limiting rod (53), and a spring (55) sleeved on the limiting rod (53) and having one end connected to the fixing frame (52) and the other end connected to the plug (54); An air inlet (56) is provided at the upper end of the valve body (51), and the plug (54) can block the air inlet (56).

6. The cylinder test oil suction device according to claim 5, characterized in that: The plug (54) is in the shape of a truncated cone, the lower end of the air inlet (56) is in the shape of a truncated cone adapted to the plug (54), and the upper end is in the shape of a cylinder having the same diameter as the top surface of the truncated cone at the lower end.

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