A hydraulic oil tank with a built-in bladder and rotatable position

Abstract

The present invention provides a hydraulic oil tank with a built-in bladder and a rotatable position, including an oil tank, an air bag fixedly arranged in the oil tank, a first vent hole opened on the air bag, a second vent hole opened on the oil tank, the first vent hole communicated with the second vent hole, a vent rod fixedly arranged in the second vent hole, the inner end of the vent rod is located in the air bag, air holes are distributed on the inner end of the vent rod, the air holes are communicated with the air channel arranged in the vent rod, and the second vent hole and the air channel are communicated with the outside air. By arranging the vent rod at the vent hole of the air bag, on the one hand, the shrunken air bag can be effectively prevented from blocking the vent hole on the oil tank; on the other hand, the air holes distributed on the vent rod can effectively relieve the gas pressure at the vent hole of the oil tank and prevent the air bag from being stretched and damaged due to blocking the vent hole.

Description

Technical Field

[0001] The invention relates to a hydraulic oil tank, in particular to a hydraulic oil tank with a built-in bladder and capable of rotating. Background Art

[0002] At present, the known hydraulic oil tanks usually adopt the following two methods (open oil tank and closed oil tank):

[0003] 1. Open fuel tank (such as Figure 4 )

[0004] This type of hydraulic oil tank has a simple structure and is suitable for most occasions. Features: The oil level in the oil tank is connected to the atmosphere through the air filter on the oil tank, so as to meet the volume changes caused by the need for oil when the equipment is working (air can supplement the changes in the amount of oil in the oil tank).

[0005] Disadvantages: a. Since the air outside the oil tank is often mixed and exchanged with the air inside the oil tank, it will cause pollution (moisture, dust) to the hydraulic oil in the oil tank. It is suitable for occasions with relatively good working environment. b. Since the inside of the oil tank is connected to the outside atmosphere, in order to prevent the oil in the oil tank from overflowing, the oil tank can only be placed horizontally.

[0006] 2. Closed fuel tank (such as Figure 5 )

[0007] Features: A closed oil tank means that the oil level in the oil tank is not directly connected to the atmosphere, but an inert gas of a certain pressure (generally 0.05MPa) is filled into the oil tank through the oil filling hole to meet the volume changes caused by the need for oil when the equipment is working.

[0008] Disadvantages: a. The oil tank needs to have excellent sealing to prevent leakage of pressurized gas. b. The volume of the oil tank itself needs to be increased to accommodate pressurized gas. C. When pressurized gas comes into contact with oil, the gas content in the oil increases, which is not conducive to the precise control of the hydraulic system.

[0009] Advantages: The oil tank can be turned over to a certain extent (to avoid the pressurized gas being connected to the system oil inlet and the hydraulic system sucking in the gas). Summary of the invention

[0010] In view of the deficiencies in the prior art, the present invention provides a hydraulic oil tank with a built-in bladder and capable of rotating.

[0011] A hydraulic oil tank with a built-in bladder and rotatable position includes an oil tank, characterized in that: an air bag is fixedly arranged in the oil tank, a first air vent is opened on the air bag, a second air vent is opened on the oil tank, the first air vent is communicated with the second air vent, a ventilation rod is fixedly arranged in the second ventilation hole, the inner end of the ventilation rod is located in the air bag, air holes are distributed on the inner end of the ventilation rod, the air holes are communicated with the air channel arranged in the ventilation rod, and the second ventilation hole and the air channel are both communicated with the outside air.

[0012] The working principle of the present invention is as follows: a rubber bladder, i.e., an air bladder, is fixedly installed in the oil tank, and the inside of the air bladder is connected to the atmosphere. When the air bladder is in a normal shape, the oil in the oil tank is in a minimum state; when the air bladder is in a compressed state, the oil in the oil tank is in a maximum state. When the volume of the oil in the tank changes, the volume change in the oil tank is compensated by the change in the shape and volume of the bladder, so that the oil and the air are physically isolated, and the oil and the air are effectively isolated. In addition, due to the large hydraulic pressure in the oil tank, when the air bladder contracts and changes, the air bladder is easily blocked at the second vent hole and is stretched into the second vent hole by the hydraulic pressure, thereby causing damage; a vent rod is provided, and when the air bladder contracts, it abuts against the vent rod, and air holes are distributed on the vent rod. The air holes and the second vent hole have a pressure-dividing ventilation function at the same time, which can effectively prevent the air bladder from blocking the second vent hole or blocking the air hole, and can effectively prevent the air bladder from blocking the second vent hole, and at the same time ensure that the gas in the air bladder can effectively communicate with the external air through the air hole.

[0013] Further: the airbag is a rubber bag and is in the shape of a round-bellied cylinder, the first vent is located at one end of the airbag, a joint is fixedly installed on the first vent, the joint passes through the second vent, the inner end of the joint is sealed with the oil tank, and the outer end of the joint is fixedly connected to the oil tank; the ventilation rod passes through the joint.

[0014] Further, a stopper is provided at the outer end of the ventilation rod, the stopper stops on the joint, an exhaust groove is provided on the outer end surface of the ventilation rod, the air passage is communicated with the exhaust groove, and the exhaust groove is located outside the joint; a nut is fixedly sleeved on the outer end of the joint, and an exhaust hole is provided at the outer end of the nut; the ventilation rod and the joint are loosely matched. The outer end of the ventilation rod contacts the bottom surface of the nut, and the exhaust groove prevents the nut from blocking the air passage.

[0015] The beneficial effects of the present invention are as follows: a) By providing a vent rod at the vent hole of the air bag, on the one hand, the shrunken air bag can be effectively prevented from blocking the vent hole on the oil tank; on the other hand, the vent holes are distributed on the vent rod, which can effectively relieve the pressure of the gas at the vent hole of the oil tank and prevent the air bag from being stretched and damaged due to blocking the vent hole. b) By changing the shape and volume of the bladder, the oil and air can be effectively isolated without affecting the change in the volume of the oil in the oil tank. c) Since there is no air in the oil tank and it is completely closed and isolated from the outside world, the oil tank can be rotated and changed at will with the equipment without affecting the working stability of the hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the present invention;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the middle A area;

[0018] Figure 3 It is a schematic diagram of the structure of the airbag in the present invention;

[0019] Figure 4 It is a structural schematic diagram of an open fuel tank in the background technology;

[0020] Figure 5 It is a structural schematic diagram of a closed oil tank in the background technology.

[0021] In the figure, 1, oil tank; 2, air bag; 21, air bag body; 22, joint; 3, nut; 31, exhaust hole; 4, sealing ring; 5, ventilation rod; 51, exhaust groove; 52, air hole; 53, air channel; 54, block; 1a, oil; 2a, oil; 3a, oil tank; 4a, air filter; 5a, motor and control part; 1b, oil; 2b, oil tank; 3b, pressurized gas; 4b, charging valve; 5b, motor and control part. DETAILED DESCRIPTION

[0022] It should be noted that the terms such as left, center, right, top, bottom, etc. in the examples of the present invention are only relative concepts or are based on the normal use state of the product, and should not be considered as restrictive.

[0023] A hydraulic oil tank with a built-in bladder and rotatable position, such as Figure 1 and Figure 2As shown, it includes an oil tank 1, the working pressure of the oil tank 1 is within the range of 0~2Mpa, the working pressure of the hydraulic system is less than 21Mpa, an air bag 2 is fixedly arranged in the oil tank 1, a first air vent is opened on the air bag 2, a second air vent is opened on the oil tank 1, the first air vent is communicated with the second air vent, a ventilation rod 5 is fixedly arranged in the second air vent, the inner end of the ventilation rod 5 is located in the air bag 2, and air holes 52 are distributed on the inner end of the ventilation rod 5, the air holes 52 are 1.5~8mm, and the size of the air holes 52 is inversely proportional to the working pressure of the oil tank 1, the air holes 52 are all communicated with the air channel 53 set in the ventilation rod 5, and the second air hole and the air channel 53 are both communicated with the outside air.

[0024] Among them, combined Figure 3 The airbag 2 is a rubber bag in a round-bellied cylindrical shape. The first vent hole is located at one end of the airbag 2. A joint 22 is fixedly installed on the first vent hole. The joint 22 passes through the second vent hole. The inner end of the joint 22 is sealed with the oil tank 1. The outer end of the joint 22 is fixedly connected to the oil tank 1. The vent rod 5 passes through the joint 22.

[0025] A stopper 54 is provided at the outer end of the ventilation rod 5, and the stopper 54 is stopped on the joint 22. An exhaust groove 51 is opened on the outer end face of the ventilation rod 5, and the air passage 53 is communicated with the exhaust groove 51, and the exhaust groove 51 is located outside the joint 22; a nut 3 is fixedly sleeved on the outer end of the joint 22, and an exhaust hole 31 is opened at the outer end of the nut 3; the ventilation rod 5 and the joint 22 are clearance-matched.

[0026] The working principle of the present invention is as follows: a rubber bladder, i.e., an air bladder, is fixedly installed in the oil tank, and the inside of the air bladder is connected to the atmosphere. When the air bladder is in a normal shape, the oil in the oil tank is in a minimum state; when the air bladder is in a compressed state, the oil in the oil tank is in a maximum state. When the volume of the oil in the tank changes, the volume change in the oil tank is compensated by the change in the shape and volume of the bladder, so that the oil and the air are physically isolated, and the oil and the air are effectively isolated. In addition, due to the large hydraulic pressure in the oil tank, when the air bladder contracts and changes, the air bladder is easily blocked at the second vent and is stretched into the second vent by the hydraulic pressure, thereby causing damage; a vent rod is provided, and when the air bladder contracts, it abuts against the vent rod, and air holes are distributed on the vent rod. The air holes and the second vent have a pressure-dividing ventilation function at the same time, which can effectively prevent the air bladder from blocking the second vent or blocking the air hole, and at the same time ensure that the gas in the air bladder can effectively communicate with the external air through the air hole. Due to the provision of the air bladder, the oil tank can be arbitrarily changed in installation angle or rotated in any spatial direction.

[0027] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A hydraulic oil tank with a built-in bladder and capable of rotating, comprising an oil tank, characterized in that: An air bag is fixedly arranged in the oil tank, a first vent hole is opened on the air bag, a second vent hole is opened on the oil tank, the first vent hole is communicated with the second vent hole, a ventilation rod is fixedly arranged in the second vent hole, the inner end of the ventilation rod is located in the air bag, air holes are distributed on the inner end of the ventilation rod, the air holes are communicated with the air channel arranged in the ventilation rod, and the second vent hole and the air channel are communicated with the outside air; the air bag is a rubber bag and is in the shape of a round belly cylinder, the first vent hole is located at one end of the air bag .... A joint is fixedly installed, the joint passes through the second vent hole, the inner end portion of the joint is sealed with the oil tank, and the outer end portion of the joint is fixedly connected to the oil tank; the vent rod passes through the joint; a block is provided at the outer end portion of the vent rod, the block is stopped on the joint, an exhaust groove is opened on the outer end surface of the vent rod, the air channel is communicated with the exhaust groove, and the exhaust groove is located outside the joint; a nut is fixedly sleeved on the outer end portion of the joint, and an exhaust hole is opened at the outer end of the nut; the vent rod and the joint are clearance-matched.

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