Pipeline system applied to shared oil suction port of two hydraulic pumps

Abstract

The utility model discloses a pipeline system applied to an oil suction port shared by two hydraulic pumps, which comprises a plunger pump, a screw pump, an oil collecting tank, a first main oil suction pipe, a second main oil suction pipe and an auxiliary oil suction pipe, according to the system, the plunger pump, the screw pump, the oil collecting tank, the first main oil suction pipe, the second main oil suction pipe and the auxiliary oil suction pipe are arranged, the oil collecting tank is connected with the oil tank and can receive oil conveyed from the oil tank, and the plunger pump is connected with the bottom of the oil collecting tank through the first main oil suction pipe, so that when the plunger pump sucks oil, the oil at the bottom of the oil collecting tank is sucked preferentially; according to the oil suction device, oil is prevented from carrying part of air to enter the plunger pump in the process of entering the oil collecting tank from the oil tank, the oil in the middle and the top in the oil collecting tank and the air in the oil collecting tank can be sucked into the screw pump in cooperation with the second main oil suction pipe and the auxiliary oil suction pipe, the air in the oil is effectively controlled not to enter the plunger pump, and the overall structure is practical and reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of machinery, in particular to a pipeline system applied to a common oil suction port of two hydraulic pumps. Background Art

[0002] In the field of presses, to quickly fill or release the hydraulic oil in the main cylinder, the hydraulic oil tank is often designed to be placed on top of the press body, directly connected to the main cylinder. This results in a long distance between the oil tank and the hydraulic pump. As the oil enters the hydraulic pump from the oil tank, it carries some air with it. Air entering certain types of hydraulic pumps can cause serious damage to the hydraulic pump, such as the plunger pump. The plunger pump has the characteristics of high pressure and high flow, making it the preferred hydraulic component in the press field. Protecting the plunger pump is equivalent to protecting the heart of the press. The screw pump is an auxiliary oil pump in the hydraulic system, and air entering the screw pump will not cause any damage to the screw pump. Publication number CN101033737A relates to a hydraulically driven, bidirectional, plunger-type high-pressure pump. It includes a hydraulic cylinder mounted on a frame and connected to front and rear working cylinders. The outer ends of the front and rear working cylinders are connected to front and rear combined suction and discharge valves, respectively. The inlet and outlet pipes of the combined valves are interconnected and connected in parallel with the pipes of other pumps to form a suction and discharge piping system. The hydraulic cylinder is connected to a hydraulic valve block mounted on the frame via a high-pressure oil pipe. The hydraulic valve block is in turn connected to a hydraulic pump, serving as a power source, via an oil pipe. This plunger-type high-pressure pump allows air to enter the oil. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a practical and reliable piping system for two hydraulic pumps sharing a common oil suction port.

[0004] To achieve the above-mentioned purpose, the solution provided by the utility model is: a piping system used for a common oil suction port of two hydraulic pumps, including a plunger pump, a screw pump, an oil collecting tank, a first main oil suction pipe, a second main oil suction pipe, and an auxiliary oil suction pipe. The plunger pump is connected to the first main oil suction pipe, the first main oil suction pipe is connected to the bottom of the oil collecting tank, the screw pump is respectively connected to the second main oil suction pipe and the auxiliary oil suction pipe, the second main oil suction pipe is connected to the middle of the oil collecting tank, the auxiliary oil suction pipe is connected to the top of the oil collecting tank, and the bottom of the oil collecting tank is connected to an oil tank.

[0005] The beneficial effects of the present invention are: preventing air from entering the plunger pump. The system is equipped with a plunger pump, a screw pump, an oil collecting tank, a first main oil suction pipe, a second main oil suction pipe, and an auxiliary oil suction pipe. The oil collecting tank is connected to the oil tank and can receive oil transported from the oil tank. The plunger pump is connected to the bottom of the oil collecting tank through the first main oil suction pipe. In this way, when the plunger pump sucks oil, it will first suck the oil at the bottom of the oil collecting tank to prevent the oil from entering the plunger pump with some air during the process of entering the oil collecting tank from the oil tank. In combination with the second main oil suction pipe and the auxiliary oil suction pipe, the oil in the middle and top of the oil collecting tank and the air inside the oil collecting tank can be sucked into the screw pump, effectively controlling the air in the oil from entering the plunger pump. The overall structure is practical and reliable.

[0006] Furthermore, it also includes a base, on which the plunger pump, screw pump and oil collecting tank are arranged.

[0007] Furthermore, a mounting frame is provided on the base, the mounting frame is vertically arranged on the base, and the mounting frame is used to install the screw pump.

[0008] Furthermore, the oil suction resistance of the second main oil suction pipe is greater than the oil suction resistance of the auxiliary oil suction pipe. With the above-mentioned structure, the diameter of the second main oil suction pipe is designed based on the oil suction capacity of the screw pump, so that the oil flow rate in the second main oil suction pipe is less than that in the auxiliary oil suction pipe. The diameter of the second main oil suction pipe is sized to ensure that the resistance of the screw pump to drawing oil from the oil collection tank through the second main oil suction pipe is greater than the resistance of the screw pump to drawing oil from the oil collection tank through the auxiliary oil suction pipe.

[0009] Furthermore, a first oil outlet is opened at the outer bottom of the oil collecting tank, and the first oil outlet is connected to a first main oil suction pipe.

[0010] Furthermore, a second oil outlet is opened at the bottom of the middle portion of the outer side of the oil collecting tank, and the second oil outlet is connected to a second main oil suction pipe.

[0011] Furthermore, the screw pump is provided with an oil suction part, and the oil suction part is connected to the second main oil suction pipe and the auxiliary oil suction pipe respectively.

[0012] Furthermore, a third oil outlet is opened on the top of the oil collecting tank, and the third oil outlet is connected to the auxiliary oil suction pipe.

[0013] Furthermore, an oil inlet is opened at the bottom of the oil collecting tank, the oil inlet is connected to an oil tank connecting pipe, and the oil tank connecting pipe is connected to the oil tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model.

[0015] Among them, 1 is the base, 11 is the mounting frame, 2 is the plunger pump, 3 is the screw pump, 31 is the oil suction part, 4 is the oil collecting tank, 51 is the first main oil suction pipe, 52 is the second main oil suction pipe, 53 is the auxiliary oil suction pipe, and 54 is the oil tank connecting pipe. DETAILED DESCRIPTION

[0016] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0017] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0018] See attached Figure 1 As shown, a piping system for two hydraulic pumps sharing a common oil suction port includes a base 1, a plunger pump 2, a screw pump 3, an oil collecting tank 4, a first main oil suction pipe 51, a second main oil suction pipe 52, and an auxiliary oil suction pipe 53. The plunger pump 2 is connected to the first main oil suction pipe 51, the first main oil suction pipe 51 is connected to the bottom of the oil collecting tank 4, the screw pump 3 is connected to the second main oil suction pipe 52 and the auxiliary oil suction pipe 53 respectively, the second main oil suction pipe 52 is connected to the middle of the oil collecting tank 4, the auxiliary oil suction pipe 53 is connected to the top of the oil collecting tank 4, and the bottom of the oil collecting tank 4 is connected to an oil tank.

[0019] In this embodiment, a plunger pump 2 , a screw pump 3 , and an oil collecting tank 4 are arranged on the base 1 ; a mounting frame 11 is provided on the base 1 , and the mounting frame 11 is vertically arranged on the base 1 , and is used to install the screw pump 3 .

[0020] In this embodiment, the oil suction resistance of the second main oil suction pipe 52 is greater than the oil suction resistance of the auxiliary oil suction pipe 53. The diameter of the second main oil suction pipe 52 is designed according to the oil suction amount of the screw pump 3. The diameter of the second main oil suction pipe 52 needs to ensure that the resistance of the screw pump 3 to suck oil from the oil collecting tank 4 through the second main oil suction pipe 52 is greater than the resistance of the screw pump 3 to suck oil from the oil collecting tank 4 through the auxiliary oil suction pipe 53.

[0021] In this embodiment, a first oil outlet is opened at the bottom of the outer side of the oil collecting tank 4, and the first oil outlet is connected to the first main oil suction pipe 51; a second oil outlet is opened in the middle of the outer side of the oil collecting tank 4, and the second oil outlet is connected to the second main oil suction pipe 52.

[0022] In this embodiment, the screw pump 3 is provided with an oil suction portion 31 , and the oil suction portion 31 is connected to the second main oil suction pipe 52 and the auxiliary oil suction pipe 53 respectively.

[0023] In this embodiment, a third oil outlet is opened on the top of the oil collecting tank 4 , and the third oil outlet is connected to the auxiliary oil suction pipe 53 .

[0024] In this embodiment, an oil inlet is opened at the bottom of the oil collecting tank 4, and the oil inlet is connected to the oil tank connecting pipe 54, and the oil tank connecting pipe 54 is connected to the oil tank.

[0025] In this embodiment, the auxiliary oil suction pipe 53 is a transparent hose, which makes it easy to observe whether the oil enters the screw pump 3 through the auxiliary oil suction pipe 53 so as to adjust the size of the second main oil suction pipe 52.

[0026] In this embodiment, the specific usage process is: start the plunger pump 2 and the screw pump 3 to suck the oil in the oil tank into the oil collecting tank 4 through the oil tank connecting pipe 54. When the oil is stored to the set capacity, the air is located on the top side of the oil collecting tank 4. Then the plunger pump 2 sucks the oil into the plunger pump 2 through the first oil outlet at the bottom of the oil collecting tank 4 through the first main oil suction pipe 51, so that the plunger pump 2 preferentially sucks the oil at the bottom of the oil collecting tank 4. In this way, the air on the top side of the oil collecting tank 4 will not enter the plunger pump 2. Since the diameter of the second main oil suction pipe 52 is larger than the diameter of the auxiliary oil suction pipe 53, it is ensured that the resistance of the screw pump 3 to suck oil from the oil collecting tank 4 through the second main oil suction pipe 52 is greater than the resistance of the screw pump 3 to suck oil from the oil collecting tank 4 through the auxiliary oil suction pipe 53, thereby ensuring that the oil mixed with air at the top of the oil collecting tank 4 passes through the auxiliary oil suction pipe 53. The oil is sucked away by the screw pump 3, and the oil in the middle of the oil collecting tank 4 enters the screw pump 3 through the second main oil suction pipe 52, ensuring that the screw pump 3 absorbs enough oil.

[0027] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art may, without departing from the scope of the present invention, utilize the technical content disclosed above to make further possible variations and modifications to the present invention, or to modify the present invention into equivalent embodiments with equivalent variations. Therefore, any equivalent variations made in accordance with the principles of the present invention without departing from the scope of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A piping system for a common oil suction port of two hydraulic pumps, comprising a plunger pump (2), a screw pump (3), an oil collecting tank (4), a first main oil suction pipe (51), a second main oil suction pipe (52), and an auxiliary oil suction pipe (53), characterized in that: The plunger pump (2) is connected to a first main oil suction pipe (51), which is connected to the bottom of an oil collecting tank (4); the screw pump (3) is connected to a second main oil suction pipe (52) and an auxiliary oil suction pipe (53), respectively; the second main oil suction pipe (52) is connected to the middle of the oil collecting tank (4); the auxiliary oil suction pipe (53) is connected to the top of the oil collecting tank (4); and the bottom of the oil collecting tank (4) is connected to an oil tank.

2. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 1, characterized in that: It also includes a base (1), on which the plunger pump (2), the screw pump (3), and the oil collecting tank (4) are arranged.

3. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 2, characterized in that: A mounting frame (11) is provided on the base (1), the mounting frame (11) being vertically arranged on the base (1), and the mounting frame (11) is used to install the screw pump (3).

4. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 1, characterized in that: The oil suction resistance of the second main oil suction pipe (52) is greater than the oil suction resistance of the auxiliary oil suction pipe (53).

5. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 1, characterized in that: A first oil outlet is formed at the outer bottom of the oil collecting tank (4), and the first oil outlet is connected to a first main oil suction pipe (51).

6. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 1, characterized in that: A second oil outlet is provided in the middle of the outer side of the oil collecting tank (4), and the second oil outlet is connected to a second main oil suction pipe (52).

7. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 1, characterized in that: The screw pump (3) is provided with an oil suction portion (31), and the oil suction portion (31) is respectively connected to a second main oil suction pipe (52) and an auxiliary oil suction pipe (53).

8. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 1, characterized in that: A third oil outlet is formed on the top of the oil collecting tank (4), and the third oil outlet is connected to an auxiliary oil suction pipe (53).

9. The piping system for two hydraulic pumps sharing a common oil suction port according to claim 1, characterized in that: An oil inlet is provided at the bottom of the oil collecting tank (4), the oil inlet is connected to an oil tank connecting pipe (54), and the oil tank connecting pipe (54) is connected to the oil tank.

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