CN219197756U

CN219197756U - Leakage-proof device for hydraulic power unit

Info

Publication number: CN219197756U
Application number: CN202223554022.1U
Authority: CN
Inventors: 高月海
Original assignee: Huaian Yansheng Hydraulic Machinery Co ltd
Current assignee: Huaian Yansheng Hydraulic Machinery Co ltd
Priority date: 2022-12-29
Filing date: 2022-12-29
Publication date: 2023-06-16
Anticipated expiration: 2032-12-29

Abstract

The utility model discloses a leakage-proof device of a hydraulic power unit, which relates to the technical field of hydraulic power units and has the technical key points that: the hydraulic pump is characterized by comprising an oil tank, wherein a valve block and a hydraulic pump are fixedly arranged at the top of the oil tank, an oil inlet at the bottom of the hydraulic pump is communicated with the oil tank, a motor for driving the hydraulic pump is arranged on the oil tank, an oil outlet of the hydraulic pump is communicated with the inside of the valve block, the valve block is communicated with a return pipe through an electromagnetic valve, the return pipe is communicated with the oil tank, an oil filling port is arranged on one side of the top of the oil tank, an external thread is arranged on the outer wall of the oil filling port, a sealing cover is arranged on the external thread, a sealing plate is arranged at the inner top of the sealing cover through a pressing spring, and a flexible sealing ring matched with the bottom of the sealing cover is arranged on the outer wall of the bottom of the oil filling port; the utility model can improve the sealing performance of the oil filling port and reduce the possibility of leakage.

Description

Leakage-proof device for hydraulic power unit

Technical Field

The utility model relates to the technical field of hydraulic power units, in particular to a leakage-proof device of a hydraulic power unit.

Background

The Hydraulic Power Unit (HPU) is used as an oil supply device, and is connected with a plurality of hydraulic cylinders through an external pipeline system to control the actions of a plurality of groups of valves, an independent closed power oil source system is formed by an oil tank, an oil pump and an energy accumulator, the oil station can be provided with a PLC control system which controls all internal hydraulic functions and generates signals to exchange with a control room (DCS), and a control element such as a hydraulic servo valve is directly arranged on the hydraulic cylinders, and high-pressure oil is pumped into the cylinders through the valve or is discharged from the hydraulic cylinders.

The prior application number is CN201220386812.0, the compact hydraulic power unit comprises a valve block, an oil tank and a motor which are fixed at two ends of the valve block, wherein a gear pump and a return pipe which are connected with an oil suction pipe, an oil outlet and a control device which are arranged on the side wall of the valve block are arranged on the end face of the valve block in the oil tank; unnecessary structure and function are reduced, the volume of the self-body is reduced, and the self-weight is reduced.

The hydraulic power unit in the current market does not have the structure that increases the leakproofness of oiling mouth department, and the probability that the oiling mouth department takes place to leak is higher, increases use cost.

Therefore, how to improve the sealing performance at the oil filling port and reduce the possibility of leakage is a technical problem that needs to be considered by those skilled in the art.

Disclosure of Invention

The utility model aims to provide a leakage-proof device of a hydraulic power unit, which improves the sealing performance of an oil filling port and reduces the possibility of leakage.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a hydraulic power unit leak protection device, includes the oil tank, the fixed valve piece and the hydraulic pump of being equipped with in oil tank top, the hydraulic pump bottom oil inlet is linked together with the oil tank, be equipped with the motor that drives the hydraulic pump on the oil tank, the oil-out and the valve piece inside of hydraulic pump are linked together, the valve piece has the back flow through solenoid valve intercommunication, the back flow is linked together with the oil tank, oil tank top one side is equipped with the oiling mouth, the oiling mouth outer wall is equipped with the external screw thread, the external screw thread is equipped with the closing cap, the top is equipped with the closing plate through pressing the spring in the closing cap, oiling mouth bottom outer wall is equipped with the flexible sealing washer with closing cap bottom looks adaptation.

By adopting the scheme, when hydraulic power is required to be provided, the motor is started to drive the hydraulic pump to suck the oil in the oil tank, so that the oil enters the valve block, and then the electromagnetic valve is opened according to the situation, so that the oil in the valve block can conveniently enter the oil tank through the return pipe; when hydraulic oil is required to be added or discharged, the sealing cover is unscrewed, the oil filling port is exposed, and the hydraulic oil is convenient to add or discharge; after the hydraulic oil is added or discharged, the sealing cover is covered and screwed, and the sealing of the oil filling port can be completed; in the screwing state of the sealing cover, the pressing spring provides pressing force for the sealing plate, the sealing plate seals the oil filling port, the bottom of the sealing cover is abutted against the flexible sealing ring, and the tightness is improved; once the sealing cover is loosened, the sealing plate still has certain sealing capacity under the action of the pressing spring, so that the possibility of leakage is reduced; the utility model improves the sealing performance of the oil filling port and reduces the possibility of leakage.

Preferably, the outer diameter of the sealing plate is the same as the outer diameter of the oil filling port.

Preferably, the connection part of the hydraulic pump and the valve block and the connection part of the electromagnetic valve and the valve block are respectively provided with a sealing ring sleeve.

Preferably, the outer wall of the closing cover is provided with a plurality of anti-slip ribs.

Preferably, the closing cover is made of high-strength alloy, and an extension rod is hinged to the top of the closing cover.

Preferably, support columns are arranged at four corners of the bottom of the oil tank in the gravity direction, oil collecting grooves are fixedly connected to the bottoms of the support columns, and the size of each oil collecting groove is larger than that of the bottom surface of the oil tank.

Preferably, the oil receiving groove is made of a transparent material, and the transparent material is polytetrafluoroethylene.

The utility model has the following beneficial effects:

when hydraulic power is required to be provided, the motor is started to drive the hydraulic pump to suck the oil in the oil tank, so that the oil enters the valve block, and then the electromagnetic valve is opened according to the situation, so that the oil in the valve block can conveniently enter the oil tank through the return pipe; when hydraulic oil is required to be added or discharged, the sealing cover is unscrewed, the oil filling port is exposed, and the hydraulic oil is convenient to add or discharge; after the hydraulic oil is added or discharged, the sealing cover is covered and screwed, and the sealing of the oil filling port can be completed; in the screwing state of the sealing cover, the pressing spring provides pressing force for the sealing plate, the sealing plate seals the oil filling port, the bottom of the sealing cover is abutted against the flexible sealing ring, and the tightness is improved; once the sealing cover is loosened, the sealing plate still has certain sealing capacity under the action of the pressing spring, so that the possibility of leakage is reduced; the utility model improves the sealing performance of the oil filling port and reduces the possibility of leakage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a front sectional view of embodiment 1 of the present utility model.

Fig. 2 is a sectional view of the oil filling port of example 1 of the present utility model.

Fig. 3 is a front cross-sectional view of embodiment 2 of the present utility model.

In the figure: 1. an oil tank; 2. a hydraulic pump; 3. a motor; 4. a valve block; 5. an electromagnetic valve; 6. a return pipe; 7. an oil filling port; 8. an external thread; 9. a closing cap; 10. pressing the spring; 11. a closing plate; 12. a flexible sealing ring; 13. a seal ring sleeve; 14. an anti-slip rib; 15. an extension rod; 16. a support column; 17. and (5) an oil collecting groove.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

Example 1

1-2, the leakage-proof device of a hydraulic power unit, as shown in fig. 1-2, including the oil tank 1, the top of the oil tank 1 is fixedly equipped with valve block 4 and hydraulic pump 2, the bottom oil inlet of the hydraulic pump 2 is linked together with the oil tank 1, there is motor 3 driving the hydraulic pump 2 on the oil tank 1, the oil outlet of the hydraulic pump 2 is linked together with the inside of the valve block 4, the valve block 4 is linked together with the back flow 6 through the electromagnetic valve 5, the back flow 6 is linked together with the oil tank 1, one side of top of the oil tank 1 has oil filling port 7, the outer wall of the oil filling port 7 has external screw thread 8, the external screw thread 8 has closing cap 9, the top is equipped with the closing plate 11 through pressing the spring 10 in the closing cap 9, the bottom outer wall of the oil filling port 7 has flexible seal ring 12 that is suitable for bottom of the closing cap 9;

as shown in fig. 1-2, when hydraulic power is required to be provided, the motor 3 is started to drive the hydraulic pump 2 to suck the oil in the oil tank 1 so as to enable the oil to enter the valve block 4, and then the electromagnetic valve 5 is opened according to the situation so as to facilitate the oil in the valve block 4 to enter the oil tank 1 through the return pipe 6; when hydraulic oil is required to be added or discharged, the sealing cover 9 is unscrewed, the oil filling port 7 is exposed, and the hydraulic oil is convenient to add or discharge; after the hydraulic oil is added or discharged, the sealing cover 9 is covered and screwed, and the sealing of the oil filling port 7 can be completed; in the screwing state of the sealing cover 9, the pressing spring 10 provides pressing force for the sealing plate 11, the sealing plate 11 seals the oil filling port 7, the bottom of the sealing cover 9 is in contact with the flexible sealing ring 12, and the sealing performance is improved; once the closing cover 9 is loosened, the closing plate 11 still has certain closing capacity under the action of the pressing spring 10, so that the possibility of leakage is reduced; the utility model improves the sealing performance of the oil filling port 7 and reduces the possibility of leakage.

As shown in fig. 1-2, the outside diameter of the closing plate 11 is the same as the outside diameter of the oil filling port 7; the sealing cover 9 can completely seal the oil filling port 7, so that sealing performance of sealing is improved.

As shown in fig. 1, a sealing ring sleeve 13 is arranged at the joint of the hydraulic pump 2 and the valve block 4 and the joint of the electromagnetic valve 5 and the valve block 4; the sealing performance of the pipeline connection part is improved, and the leakage capacity is reduced.

As shown in fig. 1, the outer wall of the closing cap 9 is provided with a plurality of anti-slip ribs 14; the anti-skid capability is improved, the closing cover 9 is convenient to twist and rotate, and the control convenience is improved.

As shown in fig. 1-2, the closing cover 9 is made of high-strength alloy, and an extension rod 15 is hinged to the top of the closing cover 9; the closing cap 9 is easily screwed or unscrewed by means of the extension rod 15 using the lever principle, so that the closing cap 9 can be screwed more tightly.

Example 2

As shown in fig. 3, unlike in embodiment 1, support columns 16 are provided at four corners of the bottom of the oil tank 1 in the gravity direction, and oil receiving grooves 17 are fixedly connected to the bottom of the support columns 16, and the size of the oil receiving grooves 17 is larger than that of the bottom of the oil tank 1; after the pipeline leaks or the oil filling port 7 leaks, hydraulic oil drops into the oil collecting groove 17 under the action of gravity, so that leaked oil is collected, and leakage to the outside is avoided.

As shown in fig. 3, the oil receiving groove 17 is made of transparent material, the transparent material is polytetrafluoroethylene, the oil receiving groove 17 is transparent, and a user can conveniently observe whether oil leakage exists or not and timely remind the user of maintenance.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be attached, detached, or integrated, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The above is only a specific embodiment of the present utility model, but the technical features of the present utility model are not limited thereto. Any simple changes, equivalent substitutions or modifications and the like made on the basis of the present utility model to solve the substantially same technical problems and achieve the substantially same technical effects are all covered in the protection scope of the present utility model.

Claims

1. The utility model provides a hydraulic power unit leak protection device, includes oil tank (1), oil tank (1) top is fixed to be equipped with valve piece (4) and hydraulic pump (2), hydraulic pump (2) bottom oil inlet is linked together with oil tank (1), be equipped with motor (3) of drive hydraulic pump (2) on oil tank (1), the oil-out and the inside intercommunication of valve piece (4) of hydraulic pump (2), valve piece (4) have back flow (6) through solenoid valve (5) intercommunication, back flow (6) are linked together with oil tank (1), oil tank (1) top one side is equipped with oiling mouth (7), its characterized in that: the outer wall of the oil filling port (7) is provided with an external thread (8), the external thread (8) is provided with a sealing cover (9), the inner top of the sealing cover (9) is provided with a sealing plate (11) through a pressing spring (10), and the outer wall of the bottom of the oil filling port (7) is provided with a flexible sealing ring (12) matched with the bottom of the sealing cover (9).

2. The hydraulic power unit leakage prevention device according to claim 1, wherein: the outer diameter of the sealing plate (11) is the same as the outer diameter of the oil filling port (7).

3. The hydraulic power unit leakage prevention device according to claim 1, wherein: the connection part of the hydraulic pump (2) and the valve block (4) and the connection part of the electromagnetic valve (5) and the valve block (4) are respectively provided with a sealing ring sleeve (13).

4. The hydraulic power unit leakage prevention device according to claim 1, wherein: the outer wall of the closing cover (9) is provided with a plurality of anti-slip convex edges (14).

5. The hydraulic power unit leakage prevention device according to claim 4, wherein: the sealing cover (9) is made of high-strength alloy, and an extension rod (15) is hinged to the top of the sealing cover (9).

6. The hydraulic power unit leakage prevention device according to claim 1, wherein: the bottom four corners of oil tank (1) gravity direction are equipped with support column (16), support column (16) bottom fixedly connected with oil receiving groove (17), the size of oil receiving groove (17) is greater than the size of oil tank (1) bottom surface.

7. The hydraulic power unit leakage prevention device according to claim 6, wherein: the oil receiving groove (17) is made of a transparent material, and the transparent material is polytetrafluoroethylene.