CN215830878U

CN215830878U - Oil suction pipe exhaust device and hydraulic system

Info

Publication number: CN215830878U
Application number: CN202122057610.3U
Authority: CN
Inventors: 朱旭峰; 王利君; 赵丹
Original assignee: Bosch Rexroth Changzhou Co Ltd
Current assignee: Bosch Rexroth Changzhou Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-02-15
Anticipated expiration: 2031-08-30

Abstract

The application provides an oil suction pipe exhaust device and a hydraulic system provided with the oil suction pipe exhaust device, wherein the oil suction pipe exhaust device is used for exhausting gas of an oil suction pipe connected with an oil tank of the hydraulic system, the oil suction pipe exhaust device is provided with an automatic exhaust valve and an air guide element, the automatic exhaust valve is provided with a first valve body connected with the oil suction pipe of the hydraulic system and a second valve body connected with the air guide element, the air guide element is provided with a first end part connected with the second valve body and a second end part far away from the second valve body, the air guide element is also provided with an air guide channel which runs through the air guide element from the first end part to the second end part, an exhaust port is arranged at the tail end of the air guide channel of the second end part, and the highest position of the second end part is flush with or higher than the highest liquid level position in the oil tank of the hydraulic system. When the hydraulic system works, air in the oil suction pipe can be automatically discharged through the exhaust device, so that the working efficiency of the hydraulic system can be greatly improved, and manpower is saved.

Description

Oil suction pipe exhaust device and hydraulic system

Technical Field

The present disclosure relates to a hydraulic system, and more particularly, to an oil suction pipe exhaust device and a hydraulic system having the same.

Background

The hydraulic pump of the hydraulic system is an energy conversion element, the hydraulic pump converts mechanical energy (torque and rotating speed) into hydraulic energy (flow and pressure), the hydraulic pump is connected with an oil tank through an oil suction pipeline, in the working process, the hydraulic pump operates and sucks oil from the oil tank into the oil suction pipeline, and then the oil is conveyed to other working elements through the oil suction pipeline. However, when the hydraulic system starts, if the air in the oil suction pipe is not discharged, the air in the oil suction pipe enters the hydraulic pump, which may cause abnormal vibration and noise in the operation of the hydraulic pump station of the hydraulic system, and may cause premature damage to components of the hydraulic pump station.

In the prior art, an exhaust valve is usually arranged on an oil suction pipe, and after a hydraulic pump of a hydraulic system works for the first time, the exhaust valve needs to be opened manually for exhausting, so that manpower is wasted, and the exhaust valve is damaged due to frequent opening and closing of the exhaust valve, so that the hydraulic system breaks down.

Therefore, there is a need to provide an improved technical solution to overcome the technical problems in the prior art.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the present application provides an oil suction pipe venting device for venting gas from an oil suction pipe connected to an oil tank of a hydraulic system, the oil suction pipe venting device comprising an automatic vent valve and an air guide element, the automatic vent valve comprising a first valve body connected to the oil suction pipe of the hydraulic system and a second valve body connected to the air guide element, the air guide element comprising a first end connected to the second valve body and a second end remote from the second valve body, the air guide element further comprising an air guide channel extending from the first end to the second end and passing through the air guide element, an air vent being provided at a distal end of the air guide channel at the second end, and the second end being flush with or higher than an oil level in the oil tank of the hydraulic system.

The application provides still provide a hydraulic system, including the oil tank, inhale oil pipe and the hydraulic pump that is connected with inhaling oil pipe that the oil tank is connected, inhale and be provided with on the oil pipe and inhale oil pipe exhaust apparatus as above.

Because set up oil suction pipe exhaust apparatus on the oil suction pipe according to this application, when hydraulic system began work, the air in the oil suction pipe can be through oil suction pipe exhaust apparatus automatic discharge, does not need artifical supplementary, also need not additionally to use other appurtenance, consequently greatly increased hydraulic system's work efficiency, use manpower sparingly.

Drawings

The present application will be more fully understood from the detailed description given below in conjunction with the accompanying drawings, in which like reference numerals refer to like elements in the figures. Wherein:

FIG. 1 illustrates a partial perspective view of a hydraulic system according to one embodiment;

FIG. 2 shows a perspective view of an embodiment of an oil suction pipe vent;

figure 3 shows a cross-sectional view of the suction pipe venting device of figure 2;

FIG. 4A is a sectional view of the automatic exhaust valve of FIG. 2 in a state;

fig. 4B is a sectional view showing another state of the automatic exhaust valve of fig. 2.

Detailed Description

Referring to fig. 1 to 4B, fig. 1 shows a partial perspective view of a hydraulic system according to an embodiment, and a hydraulic system 100 according to an embodiment includes an oil tank (not shown), an oil suction pipe 1 connected to the oil tank, and a hydraulic pump 2 connected to the oil suction pipe, wherein during operation, the hydraulic pump 2 operates to suck oil from the oil tank into the oil suction pipe 1, and then the oil is delivered to other working components through the oil suction pipe 1. Wherein, the oil suction pipe 1 is provided with an oil suction pipe exhaust device 10 which can automatically exhaust the air in the oil suction pipe 1. Normally, the oil suction pipe 1 is arranged horizontally, but may also be arranged at an angle inclined with respect to the horizontal plane, that is, the oil suction pipe 1 is arranged at an angle inclined with respect to the horizontal plane to form a high end and a low end (the high end and the low end are opposite ends of the elongated oil suction pipe 1), and the exhaust device is arranged at the high end, which is more favorable for exhausting the air in the oil suction pipe 1.

Fig. 2 shows a perspective view of an embodiment of the suction pipe vent and fig. 3 shows a cross-sectional view of the suction pipe vent of fig. 2. Referring to fig. 2 and 3, the oil suction pipe exhaust device 10 includes an automatic exhaust valve 20 and an air guide element 30 (in this embodiment, the air guide element is specifically an air guide pipe). The automatic exhaust valve is widely applied to engineering or industrial fields, generally in system architectures such as a hydraulic system or a heating and ventilation system, when the system is filled with hydraulic oil or water, gas in the hydraulic oil or water continuously escapes to the highest position and gathers due to temperature and pressure changes, and when the gas pressure is higher than the system pressure, the automatic exhaust valve can exhaust the gas in the system under the action of the gas pressure. In some embodiments, the automatic exhaust valve 20 has a first valve body 21 connected to an oil suction pipe of the hydraulic system and a second valve body 22 connected to the air guide element 30. The air guide member 30 has a first end 31 connected to the second valve body and a second end 32 remote from the second valve body, the air guide member 30 further has an air guide passage 33 extending through the air guide member from the first end 31 to the second end 32, and an air outlet 34 is provided at the end of the air guide passage 33 at the second end 32. The air of the suction pipe 1 enters the air guide member 30 through the automatic discharge valve 20 and is finally discharged through the discharge port 34. Therefore, according to the embodiment, when the hydraulic system starts to work, air in the oil suction pipe can be automatically discharged through the oil suction pipe exhaust device 10 without manual assistance or additional auxiliary tools, so that the working efficiency of the hydraulic system is greatly increased, and manpower is saved.

In some embodiments, the uppermost position of the second end 32 of the air guide element 30 is flush with or above the uppermost liquid level in the hydraulic system oil tank (not shown). That is, the maximum distance that the second end 32 reaches the ground is greater than or equal to the maximum distance that the oil level in the hydraulic system tank reaches the ground. Therefore, when the oil suction pipe exhaust device 10 exhausts, the hydraulic oil of the hydraulic system cannot flow out of the air guide element, so that the hydraulic system can work better.

With continued reference to fig. 2 and 3, in some embodiments, an air filter element 35 is disposed at the air outlet 34 of the second end 32 of the air guide element 30 to prevent dust outside the hydraulic system 100 from falling into the air guide element 30 and entering the hydraulic system 100, which may affect the quality and lifespan of the hydraulic oil. In some embodiments, a filter screen is disposed in the air filter element 35, and the filter screen has good air permeability, and can filter dust in the air and quickly exhaust the air in the oil suction pipe 1. In other embodiments, a filter material such as activated carbon may be disposed within the air filter element 35.

In some embodiments, the second end 32 of the air guide element 30 is curved such that the air outlet 34 is disposed facing the ground. In fact, the second end 32 of the air guide element 30 has at least one U-shaped bend with a downward opening and/or the air outlet 34 of the air guide element 30 faces the ground, which can reduce the probability of impurities and dust entering the air outlet 34, and can blow off part of the dust when the air in the suction pipe 1 is discharged, thereby prolonging the service life of the suction pipe exhaust device 10.

With continued reference to FIGS. 2 and 3, in some embodiments the air directing element 30 may be made of a rigid material, such as metal or rigid plastic. In order to firmly fix the air guide member 30 to the second valve body 22 of the automatic exhaust valve 20, in some embodiments, the first end portion 31 of the air guide member 30 is inserted into the second valve body 22 by interference fit, and in other embodiments, the first end portion 31 of the air guide member 30 may be connected to the second valve body 22 by screw connection.

Fig. 4A is a sectional view showing one state of the automatic exhaust valve of fig. 2, and fig. 4B is a sectional view showing another state of the automatic exhaust valve of fig. 2. Referring to fig. 4A and 4B in combination, in some embodiments, the first valve body 21 of the automatic exhaust valve 20 has a first cavity 211 and a second cavity 212 that are longitudinally through the first valve body, the second cavity 212 communicates with the first cavity 211 and receives the exhaust float 23, a width of the first cavity 211 perpendicular to the longitudinal direction of the first valve body 21 is smaller than a diameter of the exhaust float 23, the second valve body 22 is partially received in the second cavity 212, the second valve body 22 has a third cavity 221 that is longitudinally through the second valve body 22, the third cavity 221 communicates with the second cavity 212 of the first valve body 21, and a width of the third cavity 221 perpendicular to the longitudinal direction of the second valve body 22 is smaller than a diameter of the exhaust float 23. In some embodiments, second valve body 22 is received within second cavity 212 by a threaded connection. Preferably, when the automatic exhaust valve is assembled to the oil suction pipe 1, the longitudinal direction of the first valve body is perpendicular to the horizontal plane.

As shown in fig. 4A, when the atmospheric pressure of the air guide device 30 is greater than the hydraulic pressure of the oil suction pipe, the vent ball float 23 is pushed toward the first cavity 211 of the first valve body 21 by the atmospheric pressure, and since the width of the first cavity 211 perpendicular to the longitudinal direction of the first valve body 21 is smaller than the diameter of the vent ball float 23, the vent ball float 23 will seal the first cavity, so that the air in the air guide device 30 will not enter the oil suction pipe, and the hydraulic system can be protected from working more effectively. As shown in fig. 4B, in some embodiments, the density of the air exhaust float ball is the same as the density of the oil in the hydraulic system, and after the oil in the oil suction pipe enters the first valve body, the air exhaust float ball 23 is floated by the oil, so that the air in the oil suction pipe 1 can be discharged into the third cavity 221 of the second valve body 22 and then discharged out of the hydraulic system 100 through the air guide element 30.

In other embodiments, the sidewall of the second valve body 22 received in the second cavity 212 is provided with a first vent groove 222 communicated with the second cavity 212, and the first vent groove 222 is communicated with the third cavity 221 through a second vent groove 223. Such a venting design can allow the air in the oil suction pipe 1 to flow into the third cavity 221 more smoothly and to exit the hydraulic system 100.

The above detailed description is intended to be illustrative, but not limiting, of the present application, and the scope of the patent protection given to this application is defined by the appended claims.

Claims

1. An oil suction pipe exhaust device is used for exhausting gas of an oil suction pipe connected with an oil tank of a hydraulic system, and is characterized in that: the exhaust device of the oil suction pipe is provided with an automatic exhaust valve and an air guide element, the automatic exhaust valve is provided with a first valve body which can be connected with the oil suction pipe of the hydraulic system and a second valve body which is connected with the air guide element, the air guide element is provided with a first end part which is connected with the second valve body and a second end part which is far away from the second valve body, the air guide element is also provided with an air guide channel which runs through the air guide element from the first end part to the second end part, the tail end of the air guide channel of the second end part is provided with an exhaust port, and the highest position of the second end part is flush with or higher than the highest liquid level position of an oil tank of the hydraulic system.

2. The suction tube venting device of claim 1, wherein: the first valve body is provided with a first cavity and a second cavity which are communicated with the first cavity in the longitudinal direction and contain the exhaust floating ball, the width of the first cavity in the longitudinal direction perpendicular to the first valve body is smaller than the diameter of the exhaust floating ball, the second valve body is partially contained in the second cavity, the second valve body is provided with a third cavity which is communicated with the second cavity of the first valve body in the longitudinal direction, and the width of the third cavity in the longitudinal direction perpendicular to the second valve body is smaller than the diameter of the exhaust floating ball.

3. The suction tube venting device of claim 2, wherein: and a first vent groove communicated with the second cavity is formed in the side wall of the second valve body accommodated in the second cavity, and the first vent groove is communicated with the third cavity through the second vent groove.

4. The suction tube venting device of claim 1, wherein: and an air filtering element is arranged at an air outlet at the second end part of the air guide element.

5. The suction tube venting device of claim 4, wherein: the second end of the air guide element has at least one U-bend with a downward opening or the air outlet of the air guide element faces the ground.

6. The suction tube venting device of claim 4, wherein: the air filter element has a filter screen.

7. The suction tube venting device of claim 4, wherein: the air guide element is made of a rigid material.

8. Hydraulic system comprising a tank, a suction pipe connected to the tank and a hydraulic pump connected to the suction pipe, characterized in that the suction pipe is provided with a suction pipe venting device according to one of claims 1-7.

9. The hydraulic system of claim 8, wherein: the oil suction pipe is obliquely arranged relative to a horizontal plane to form a high end and a low end, and the exhaust device is arranged at the high end.

10. The hydraulic system of claim 8, wherein: the lengthwise direction of the first valve body is vertical to the horizontal plane.