High and low pressure adjustable constant temperature hydraulic device

Abstract

The invention discloses a high-low pressure adjustable constant-temperature hydraulic device, and belongs to the technical field of hydraulic equipment, the high-low pressure adjustable constant-temperature hydraulic device comprises an oil tank main body, a pressure compensation mechanism, a pressure relief mechanism, a vacuum mechanism, a condensation mechanism and a heat dissipation mechanism, the top of the oil tank main body is provided with a hydraulic pump, and one end of the hydraulic pump is connected with a pressure gauge; an oil outlet is formed in the other end of the pressure gauge, the hydraulic pump communicates with the interior of the oil tank body, and an oil return opening is formed in the other end of the top of the oil tank body. The device has the beneficial effects that when the internal pressure of the oil tank is increased, redundant air pressure is exhausted to the pressure bin through the connecting pipe, the first piston moves upwards to store air, shell deformation is avoided, when the pressure is normal, the first piston resets to the middle position by means of spring force, and when the pressure is reduced, the connecting pipe generates suction force, the first piston moves downwards, air compensates the air pressure of the oil tank, and balance is kept; the mechanism effectively isolates internal and external air straight-through, and keeps the internal pressure of the oil tank stable.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic equipment, and in particular to a high-low pressure adjustable constant temperature hydraulic device. Background Art

[0002] A hydraulic device is a transmission method that uses liquid as a working medium and converts energy through liquid pressure. It is widely used in various machines and equipment. Existing hydraulic devices are all equipped with a breathing valve. When the pressure inside the hydraulic system exceeds the set value, the breathing valve will automatically open to release excess fluid to maintain system stability; when the pressure is lower than the set value, the breathing valve will open to allow external air to enter the interior, preventing the internal pressure from being too low and causing deformation of the shell.

[0003] After searching, the Chinese patent authorization number CN219139539U discloses a breathing valve device that can recover hydraulic oil. Although the existing hydraulic device can achieve the advantage of hydraulic oil not overflowing through the breathing valve and can effectively prevent air and foreign matter from entering the oil tank, the existing hydraulic device is connected to the outside through the breathing valve, which will inevitably cause the internal oil and gas to volatilize. At the same time, when the external air is connected to the inside of the hydraulic device through the breathing valve, external water vapor and other gases enter the oil tank and mix with the hydraulic oil. After water is mixed into the hydraulic oil, the hydraulic oil may be emulsified and become turbid. This emulsified oil will reduce the lubrication performance of the hydraulic oil, accelerate the wear of parts, and reduce the efficiency of the system. Summary of the invention

[0004] One of the purposes of the present application is to provide a high and low pressure adjustable constant temperature hydraulic device to solve the problem that the existing hydraulic device is connected to the outside through a breathing valve, which inevitably causes the internal oil and gas to volatilize, and at the same time, external water vapor and other gases enter the oil tank and mix with the hydraulic oil. After the hydraulic oil is mixed with water, the hydraulic oil may be emulsified.

[0005] To achieve the above objectives, the technical solution adopted in the present application is: a high-low pressure adjustable constant temperature hydraulic device, comprising a tank body, a pressure compensation mechanism, a pressure relief mechanism, a vacuum mechanism, a condensation mechanism and a heat dissipation mechanism, a hydraulic pump is installed on the top of the tank body, one end of the hydraulic pump is connected to a pressure gauge, the other end of the pressure gauge is provided with an oil outlet, the hydraulic pump is communicated with the interior of the tank body, an oil return port is installed at the other end of the top of the tank body, a pressure compensation mechanism is installed on one side of the tank body, one end of the pressure compensation mechanism is communicated with the interior of the tank body, and the other end of the pressure compensation mechanism is communicated with the pressure relief mechanism, a bracket is installed at the end of the tank body, a vacuum mechanism is installed on the top of the bracket, one end of the vacuum mechanism is communicated with the interior of the tank body, and a condensation mechanism is installed at the other end of the vacuum mechanism, one side of the vacuum mechanism is communicated with the heat dissipation mechanism, and the other end of the heat dissipation mechanism is communicated with the interior of the tank body, and the other end of the top of the tank body is threadedly connected with an exhaust port, wherein a one-way flow valve is provided at the connection between the tank body and the vacuum mechanism.

[0006] Preferably, the pressure compensation mechanism includes a connecting pipe connected to the exhaust port, the other end of the connecting pipe is connected to the interior of one end of the bottom of the pressure chamber through a connecting head, a first piston is arranged inside the pressure chamber, a first spring is arranged at the top and bottom of the first piston, the first spring is located inside the pressure chamber, and a sliding rod is inserted into the first piston, one end of the top of the sliding rod is threadedly connected to one end of the top of the pressure chamber, the outer wall of one end of the bottom of the sliding rod is slidably connected to the first piston, and the sliding rod is inserted into two springs inside the pressure chamber. When the internal pressure of the oil tank body is relatively large, the air pressure inside the oil tank body will be discharged into the pressure chamber through the connecting pipe, thereby pushing the first piston inside the pressure chamber to move upward, so that excess gas inside the oil tank body can be stored inside the pressure chamber, which is beneficial to prevent the internal air pressure of the oil tank body from being too high and causing deformation of the shell. When the internal air pressure of the oil tank body returns to normal, the first piston will be reset by the first spring under the action of the first spring above the first piston.

[0007] Preferably, four pressure chambers are provided, and the four pressure chambers are arranged in a straight line with equal spacing, and one side of the pressure chamber is welded to the surface of the fixing frame, and the fixing frame is installed on the outer wall of the oil tank body by bolts. A pressure relief port is provided at one end of the top of the pressure chamber, and adjacent pressure relief ports are connected in series with each other. A one-way valve is provided at one end of the bottom of the pressure chamber, and the one-way valves are connected in series with each other, and the one-way valve is connected to the pressure relief port through a pipeline, wherein the one-way valve is provided with a pressure value, and when the pressure applied to the one-way valve reaches a specified value, the one-way valve opens to allow air circulation.

[0008] Preferably, the pressure relief mechanism includes a threaded interface connected to the one-way valve, the top end of the threaded interface is connected to the bottom of the breathing tube, a second piston is arranged inside the breathing tube, a hole groove is provided on the middle outer wall of the second piston and is connected to the hole groove at the bottom of the second piston, the outer wall of the second piston is tightly fitted with the inner wall of the breathing tube, and the outer wall of the second piston is in sliding contact with the inner wall of the breathing tube, a second spring is arranged on the top and bottom of the second piston, and holes grooves are regularly distributed on the outer walls of the top end and the bottom end of the breathing tube in an annular shape, when the internal pressure of the fuel tank body is too small and exceeds the compensation range of the pressure chamber, the first piston will move downward to the bottom of the pressure chamber, and the one-way valve will be connected to the pressure relief mechanism, and the pressure relief mechanism can make the internal second piston move downward inside the breathing tube, so that the air pressure inside the fuel tank body is compensated by the air in the cavity at the bottom of the breathing tube.

[0009] Preferably, a partition is welded to the middle of the outer wall of the breathing tube, and an outer shell is welded to the top and bottom of the partition, a hole groove is opened on the surface of the outer shell, and one end of the outer shell is threadedly connected to the connecting cover, there is a cavity between the inner wall of the outer shell and the outer wall of the breathing tube, and a tubular filter is inserted between the inner wall of the outer shell and the outer wall of the breathing tube. When the air in the cavity at the bottom of the breathing tube is insufficient, the second piston will slide to the bottom of the breathing tube, so that the threaded interface can be connected with the hole groove on the surface of the outer wall of the breathing tube through the channel inside the second piston, so that the external air can pass through the outer shell and the filter in turn and enter the interior of the breathing tube, and the filtered air can enter the interior of the fuel tank body through the threaded interface, which is beneficial to further ensure that the interior of the fuel tank body is in a constant pressure state.

[0010] Preferably, the spring at one end of the top inside the breathing tube contacts the bottom of the adjusting block, the outer wall of the adjusting block slides in contact with the inner wall surface of the breathing tube, and the top of the adjusting block is rotatably connected to the bottom of the threaded rod, and the threaded rod is threadedly connected to the top of the breathing tube, and a knob is welded on the top of the threaded rod. By turning the knob, the knob can drive the threaded rod to rotate, and the threaded rod can drive the adjusting block to move up and down, thereby adjusting the pressure of the second spring, which is beneficial to adjusting the pressure of the gas to push the second piston.

[0011] Preferably, the vacuum mechanism includes an oil connecting pipe connected to the oil tank body, the other end of the oil connecting pipe is connected to the interior of the heating box, the top of the heating box is connected to one end of the bottom of the exhaust pipe, the top of the exhaust pipe is connected to the vacuum pump, the output end of the vacuum pump is connected to the exhaust pipe, and two groups of heating coils are arranged inside the heating box, and the heating coils are multi-bend. Under the action of the circulating pump, the hydraulic oil inside the oil tank body will enter the interior of the heating box through the oil connecting pipe, and the air inside the heating box will be extracted by the vacuum pump, so that the interior of the heating box is in a vacuum state under the action of the vacuum pump, and then the hydraulic oil inside the heating box is heated by the heating coil, so that the water content of the hydraulic oil inside the heating box can be evaporated at low temperature, which is beneficial to the oil-water separation of the hydraulic oil inside the heating box and avoids the mixing of water in the hydraulic oil.

[0012] Preferably, the condensation mechanism includes a bent pipe connected to the interior of the heating box, one end of the bottom of the bent pipe is connected to one end of the condenser, a jacket is provided on the outside of the condenser, a cavity is present between the inner wall of the jacket and the outer wall of the condenser, a cold flow port is provided at one end of the jacket, and a hot flow port is provided at the other end of the jacket, the other end of the condenser is connected to the input end of the air pump, and the other end of the air pump is connected to the return air pipe, the evaporated water enters the inside of the bent pipe under the action of the air pump, and then enters the inside of the condenser through the bent pipe, the external cooling medium enters the inside of the jacket through the cold flow port, thereby cooling the condenser inside the jacket, and the steam inside the condenser is liquefied after condensation.

[0013] Preferably, the return air pipe is connected to one end of the heating box, the top end of the curved pipe is inserted into the interior of the heating box, and one end of the curved pipe extends to the other end inside the heating box, the curved pipe is in an L-shaped structure, and the bottom of the condenser is connected to the top of the water tank, and a cold water valve is installed on one side of the water tank, and the liquefied condensed water flows into the water tank for storage, which is beneficial to collect the moisture inside the hydraulic oil.

[0014] Preferably, the heat dissipation mechanism includes a solenoid valve connected to the interior of the heating box, the solenoid valve is connected to one end of the main pipeline, and the other end of the main pipeline is connected to the first water tank, a heat dissipation pipe is provided on one side of the first water tank, and the interior of the heat dissipation pipe is a hollow structure, the two ends of the heat dissipation pipe are respectively connected to the first water tank and the second water tank, and the second water tank is connected to the interior of the oil tank body through a circulating pump, a cooling fan is installed on one side of the heat dissipation pipe, the hydraulic oil with a higher temperature inside the heating box enters the main pipeline under the action of the circulating pump, and then enters the interior of the first water tank through one end of the main pipeline, the hydraulic oil inside the first water tank is dispersed through a plurality of heat dissipation pipes, the hydraulic oil circulates inside the heat dissipation pipe while dissipating heat through the heat dissipation pipe, and at the same time, the cooling fan on one side accelerates the circulation between the outside of the heat dissipation pipe and the air, thereby further achieving a cooling effect, the hydraulic oil that has been fully cooled and dissipated will enter the interior of the second water tank, and then circulate to the interior of the oil tank body through the second water tank, thereby avoiding the hydraulic oil temperature inside the oil tank body being too high, which is beneficial to keep the hydraulic oil at a constant temperature, and a temperature sensor is provided inside the oil tank body for real-time monitoring the temperature of the hydraulic oil inside the oil tank.

[0015] Compared with the prior art, the beneficial effects of this application are:

[0016] (1) This is a high-low pressure adjustable constant temperature hydraulic device. When the internal pressure of the oil tank increases, the excess air pressure is discharged to the pressure chamber through the connecting pipe, and the first piston moves up to store air to avoid deformation of the shell. When the pressure is normal, the first piston is reset to the middle position with the help of spring force. When the pressure decreases, the connecting pipe generates suction, the first piston moves down, and the air compensates for the air pressure in the oil tank to maintain balance. This mechanism effectively isolates the direct passage of air inside and outside and maintains the stability of the internal pressure of the oil tank. When the internal pressure of the oil tank is lower than the set threshold and exceeds the compensation capacity of the pressure chamber, the first piston will move down to the bottom of the pressure chamber, triggering the linkage between the one-way valve and the pressure relief mechanism. The pressure relief mechanism guides the second piston to move downward along the breathing tube, and uses the air in the cavity at the bottom of the breathing tube to compensate for the internal air pressure of the oil tank. If there is insufficient air at the bottom of the breathing tube, the second piston will slide to the bottom of the breathing tube, so that the threaded interface is connected to the hole groove on the outer wall of the breathing tube through the internal channel of the second piston, allowing the outside air to pass through the outer shell and the filter, and enter the fuel tank after filtering to maintain a constant pressure state inside the fuel tank. Relatively speaking, when the amount of air inside the pressure chamber exceeds its tolerance range, the air at the top of the pressure chamber will enter the breathing tube through the pressure relief port, pushing the second piston to move upward, so that the excess air in the breathing tube is discharged through the internal channel of the second piston and the hole groove on the outer wall of the top of the breathing tube. This process prevents the internal air pressure of the fuel tank from being too high, and further ensures the constancy of the internal pressure of the fuel tank. The design of this pressure compensation mechanism achieves a rapid response to pressure changes and maintains the balance of system pressure by finely controlling the movement of the internal piston and the opening and closing of the one-way valve. At the same time, the air compensation in the cavity at the bottom of the breathing tube and the supply of filtered external air improve the reliability and stability of the system.

[0017] (2) This is a high-low pressure adjustable constant temperature hydraulic device. In the hydraulic system, the hydraulic oil inside the oil tank body is transported to the inside of the heating box through the connecting oil pipe under the action of the circulating pump. Subsequently, the vacuum pump is started to extract the air inside the heating box to form a vacuum state. In this vacuum environment, the heating coil heats the hydraulic oil, causing the water in the oil to evaporate at a lower temperature, thereby achieving oil-water separation and ensuring the quality of the hydraulic oil. The evaporated water is guided to the bend pipe under the action of the air pump and finally enters the inside of the condenser. This process not only effectively collects the water in the hydraulic oil, but also avoids the emulsification phenomenon caused by water doping, thereby ensuring the performance of the hydraulic oil and the stable operation of the system.

[0018] (3) A high-low pressure adjustable constant temperature hydraulic device, in the hydraulic system, the high-temperature hydraulic oil inside the heating box enters the main pipeline under the drive of the circulation pump, and the hydraulic oil is transported from one end of the main pipeline to the first water tank. In the first water tank, the hydraulic oil is dispersed through a plurality of heat dissipation pipes. The design of these pipes allows the hydraulic oil to contact the pipe wall when flowing inside, thereby achieving heat transfer. The high thermal conductivity of the heat dissipation pipe promotes heat exchange between the hydraulic oil and the surrounding environment. The regulated hydraulic oil is circulated back to the inside of the oil tank body. This continuous cooling cycle not only prevents the hydraulic oil temperature from being too high, but also helps to maintain the constant temperature of the hydraulic oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a rear view structural schematic diagram of the present invention.

[0021] Figure 3 It is a schematic diagram of the condensation mechanism structure of the present invention.

[0022] Figure 4 It is a schematic diagram of the structure of the pressure compensation mechanism of the present invention.

[0023] Figure 5 This is a schematic diagram of the first piston structure of the present invention.

[0024] Figure 6 It is a schematic diagram of the structure of the pressure relief mechanism of the present invention.

[0025] Figure 7 This is a schematic diagram of the second piston structure of the present invention.

[0026] Figure 8 It is a schematic diagram of the top structure of the present invention.

[0027] Fig. 9 It is a side view structural schematic diagram of the present invention.

[0028] In the figure: 1. oil tank body; 2. pressure compensation mechanism; 201. connecting pipe; 202. connecting head; 203. one-way valve; 204. pressure chamber; 205. first spring; 206. first piston; 207. fixing frame; 208. pressure relief port; 209. slide rod; 3. pressure relief mechanism; 301. threaded interface; 302. second spring; 303. breathing tube; 304. filter screen; 305. partition; 306. second piston; 307. housing; 308. adjusting block; 309. threaded rod; 310. knob; 311. connecting cover; 4. vacuum mechanism; 401. connecting oil pipe; 402. vacuum pump; 4 03. Heating box; 404. Exhaust pipe; 405. Exhaust pipe; 406. Heating coil; 5. Condensation mechanism; 501. Return air pipe; 502. Air pump; 503. Elbow pipe; 504. Cold flow port; 505. Water storage tank; 506. Hot flow port; 507. Jacket; 508. Condenser; 509. Cold water valve; 6. Heat dissipation mechanism; 601. Solenoid valve; 602. Main pipeline; 603. First water tank; 604. Heat dissipation exhaust pipe; 605. Cooling fan; 606. Second water tank; 607. Circulation pump; 7. Exhaust port; 8. Pressure gauge; 9. Hydraulic pump; 10. Oil outlet; 11. Oil return port; 12. Bracket. DETAILED DESCRIPTION

[0029] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0030] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0032] One of the preferred embodiments of the present application is as follows: Figures 1 to 5As shown, a high-low pressure adjustable constant temperature hydraulic device includes a tank body 1, a pressure compensation mechanism 2, a pressure relief mechanism 3, a vacuum mechanism 4, a condensation mechanism 5 and a heat dissipation mechanism 6. A hydraulic pump 9 is installed on the top of the tank body 1, one end of the hydraulic pump 9 is connected to a pressure gauge 8, and the other end of the pressure gauge 8 is provided with an oil outlet 10. The hydraulic pump 9 is connected to the inside of the tank body 1, and an oil return port 11 is installed at the other end of the top of the tank body 1. A pressure compensation mechanism 2 is installed on one side of the tank body 1, one end of the pressure compensation mechanism 2 is connected to the inside of the tank body 1, and the other end of the pressure compensation mechanism 2 is connected to the pressure relief mechanism 3. A bracket 12 is installed at the end of the tank body 1, and a vacuum mechanism 4 is installed on the top of the bracket 12. One end of the vacuum mechanism 4 is connected to the inside of the tank body 1, and the vacuum mechanism 4 is connected to the inside of the tank body 1. A condensing mechanism 5 is installed at the other end of the structure 4, one side of the vacuum mechanism 4 is connected with the heat dissipation mechanism 6, and the other end of the heat dissipation mechanism 6 is connected with the inside of the oil tank body 1, and the other end of the top of the oil tank body 1 is threadedly connected with an exhaust port 7, the pressure compensation mechanism 2 includes a connecting pipe 201 connected with the exhaust port 7, the other end of the connecting pipe 201 is connected with the inside of the bottom end of the pressure chamber 204 through a connector 202, a first piston 206 is arranged inside the pressure chamber 204, a first spring 205 is arranged at the top and bottom of the first piston 206, the first spring 205 is located inside the pressure chamber 204, and a sliding rod 209 is inserted into the first piston 206, the top end of the sliding rod 209 is threadedly connected to the top end of the pressure chamber 204, and the outer wall of the bottom end of the sliding rod 209 is connected to the first piston 206 is slidably connected, and the slide bar 209 is inserted into the two springs inside the pressure chamber 204. There are four pressure chambers 204, and the four pressure chambers 204 are arranged in a straight line with equal spacing. One side of the pressure chamber 204 is welded to the surface of the fixing frame 207, and the fixing frame 207 is installed on the outer wall of the oil tank body 1 by bolts. A pressure relief port 208 is provided at one end of the top of the pressure chamber 204, and adjacent pressure relief ports 208 are connected in series with each other. A one-way valve 203 is provided at one end of the bottom of the pressure chamber 204, and the one-way valves 203 are connected in series with each other, and the one-way valve 203 is connected with the pressure relief port 208 through a pipeline. When the pressure inside the oil tank body 1 increases, the internal air pressure is discharged into the pressure chamber 204 through the connecting pipe 201, pushing the pressure chamber 204 The first piston 206 moves upward, thereby storing excess gas in the pressure chamber 204 to prevent the tank body 1 from deforming due to excessive internal air pressure. When the pressure inside the tank body 1 returns to normal, the first piston 206 is reset under the action of the first spring 205 and returns to the middle position of the pressure chamber 204. Relatively speaking, if the pressure inside the tank body 1 decreases, the connecting pipe 201 will generate suction to move the first piston 206 in the pressure chamber 204 downward, allowing the air in the pressure pipe to compensate for the inside of the tank body 1 to maintain air pressure balance. This pressure compensation mechanism is implemented through the pressure compensation mechanism 2, which helps to prevent direct circulation between the inside of the tank body 1 and the outside air, thereby maintaining the stability of the internal pressure of the tank body 1.

[0033] One of the preferred embodiments of the present application is as follows: Figures 1 to 6 As shown, the pressure relief mechanism 3 includes a threaded interface 301 connected to the one-way valve 203, and one end of the top of the threaded interface 301 is connected to the bottom of the breathing tube 303. A second piston 306 is arranged inside the breathing tube 303. A hole groove is arranged on the outer wall of the middle part of the second piston 306 and is connected to the hole groove at the bottom of the second piston 306. The outer wall of the second piston 306 is tightly fitted with the inner wall of the breathing tube 303, and the outer wall of the second piston 306 is in sliding contact with the inner wall of the breathing tube 303. A second spring 302 is arranged on the top and bottom of the second piston 306, and the outer wall of the top end and the outer wall of the bottom end of the breathing tube 303 are regularly distributed with holes and grooves in an annular shape. A partition 305 is welded in the middle of the outer wall of the breathing tube 303, and the top of the partition 305 is welded to the bottom of the second piston 306. The top and the bottom are welded with a shell 307, a hole groove is opened on the surface of the shell 307, and one end of the shell 307 is threadedly connected to the connecting cover 311, there is a cavity between the inner wall of the shell 307 and the outer wall of the breathing tube 303, and a tubular filter 304 is inserted between the inner wall of the shell 307 and the outer wall of the breathing tube 303, a spring at one end of the top of the breathing tube 303 is in contact with the bottom of the adjusting block 308, the outer wall of the adjusting block 308 is in sliding contact with the inner wall surface of the breathing tube 303, and the top of the adjusting block 308 is rotatably connected to the bottom of the threaded rod 309, and the threaded rod 309 is threadedly connected to the top of the breathing tube 303, and a knob 310 is welded on the top of the threaded rod 309. When the internal pressure of the fuel tank body 1 is too small and exceeds the pressure chamber 2 04, the first piston 206 will move downward to the bottom of the pressure chamber 204, and the one-way valve will be connected to the pressure relief mechanism 3, and the pressure relief mechanism 3 can make the internal second piston 306 move downward inside the breathing tube 303, so that the air pressure inside the tank body 1 is compensated by the air in the bottom cavity of the breathing tube 303. When the air in the bottom cavity of the breathing tube 303 is insufficient, the second piston 306 will slide to the bottom of the breathing tube 303, so that the threaded interface 301 can be connected with the hole groove on the outer wall surface of the breathing tube 303 through the channel inside the second piston 306, so that the external air can pass through the shell 307 and the filter 304 in turn and enter the breathing tube 303. Inside, the filtered air can enter the fuel tank body 1 through the threaded interface 301, which is conducive to further ensuring that the interior of the fuel tank body 1 is in a constant pressure state. When the excess air in the pressure chamber 204 exceeds the bearing range of the pressure chamber 204, the air at the top end of the pressure chamber 204 will enter the breathing tube 303 through the pressure relief port 208, pushing the second piston 306 inside the breathing tube 303 to move upward, and then the excess air in the breathing tube 303 can be discharged through the channel inside the second piston 306 and the hole groove on the outer wall of the top end of the breathing tube 303, thereby avoiding excessive air pressure inside the fuel tank body 1, and can further ensure that the interior of the fuel tank body 1 is in a constant pressure state.

[0034] One of the preferred embodiments of the present application is as follows: Figures 1 to 8 As shown, the vacuum mechanism 4 includes a connecting oil pipe 401 connected to the oil tank body 1, the other end of the connecting oil pipe 401 is connected to the inside of the heating box 403, the top of the heating box 403 is connected to one end of the bottom of the exhaust pipe 404, the top of the exhaust pipe 404 is connected to the vacuum pump 402, the output end of the vacuum pump 402 is connected to the exhaust pipe 405, two groups of heating coils 406 are arranged inside the heating box 403, and the heating coils 406 are multi-bends, the condensing mechanism 5 includes a bent pipe 503 connected to the inside of the heating box 403, one end of the bottom of the bent pipe 503 is connected to one end of the condensing pipe 508, and the condensing pipe A jacket 507 is provided on the outside of 508, a cavity exists between the inner wall of the jacket 507 and the outer wall of the condenser 508, a cold flow port 504 is provided at one end of the jacket 507, and a hot flow port 506 is provided at the other end of the jacket 507, the other end of the condenser 508 is connected to the input end of the air pump 502, the other end of the air pump 502 is connected to the return air pipe 501, the return air pipe 501 is connected to one end of the heating box 403, one end of the top of the elbow 503 is inserted into the interior of the heating box 403, and one end of the elbow 503 extends to the other end of the interior of the heating box 403, the elbow 503 is in an L-shaped structure, and the condenser 508 The bottom is connected to the top of the water storage tank 505, and a cold water valve 509 is installed on one side of the water storage tank 505. Under the action of the circulating pump 607, the hydraulic oil in the oil tank body 1 will enter the heating box 403 through the connecting oil pipe 401, and the air in the heating box 403 will be extracted through the vacuum pump 402, so that the heating box 403 is in a vacuum state under the action of the vacuum pump 402, and then the hydraulic oil in the heating box 403 is heated by the heating coil 406, so that the water in the hydraulic oil in the heating box 403 can be evaporated at a low temperature, which is beneficial to the heating box 403. The hydraulic oil in 03 is separated from water to avoid water mixing in the hydraulic oil. The evaporated water enters the elbow 503 under the action of the air pump 502, and then enters the condenser 508 through the elbow 503. The external cooling medium enters the jacket 507 through the cold flow port 504, thereby cooling the condenser 508 in the jacket 507. The steam in the condenser 508 is liquefied after condensation and flows into the water storage tank 505 for storage, which is conducive to collecting the water in the hydraulic oil and avoiding emulsification of the hydraulic oil.

[0035] One of the preferred embodiments of the present application is as follows: Figures 1 to 9As shown, the heat dissipation mechanism 6 includes a solenoid valve 601 connected to the interior of the heating box 403, the solenoid valve 601 is connected to one end of the main pipeline 602, and the other end of the main pipeline 602 is connected to the first water tank 603, a heat dissipation pipe 604 is arranged on one side of the first water tank 603, and the interior of the heat dissipation pipe 604 is a hollow structure, the two ends of the heat dissipation pipe 604 are respectively connected to the first water tank 603 and the second water tank 606, and the second water tank 606 is connected to the interior of the oil tank body 1 through a circulating pump 607, a cooling fan 605 is installed on one side of the heat dissipation pipe 604, and the hydraulic oil with a higher temperature inside the heating box 403 enters the main pipeline under the action of the circulating pump 607. 602, and then enters the first water tank 603 through one end of the main pipeline 602. The hydraulic oil in the first water tank 603 is dispersed through a plurality of heat dissipation pipes 604. The hydraulic oil circulates inside the heat dissipation pipes 604 and dissipates heat through the heat dissipation pipes 604. At the same time, the circulation between the outside of the heat dissipation pipes 604 and the air is accelerated through a cooling fan 605 on one side, thereby further achieving a cooling effect. The hydraulic oil that has been fully cooled and dissipated will enter the second water tank 606, and then circulate to the inside of the oil tank body 1 through the second water tank 606, thereby avoiding the hydraulic oil temperature inside the oil tank body 1 from being too high, which is beneficial to keeping the hydraulic oil at a constant temperature.

[0036] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A high and low pressure adjustable constant temperature hydraulic device, characterized in that: The invention comprises an oil tank body (1), a pressure compensation mechanism (2), a pressure relief mechanism (3), a vacuum mechanism (4), a condensation mechanism (5) and a heat dissipation mechanism (6); a hydraulic pump (9) is installed on the top of the oil tank body (1); one end of the hydraulic pump (9) is connected to a pressure gauge (8); the other end of the pressure gauge (8) is provided with an oil outlet (10); the hydraulic pump (9) is connected to the inside of the oil tank body (1); the other end of the top of the oil tank body (1) is provided with an oil return port (11); a pressure compensation mechanism (2) is installed on one side of the oil tank body (1); the pressure compensation mechanism (2) One end is connected to the interior of the oil tank body (1), and the other end of the pressure compensation mechanism (2) is connected to the pressure relief mechanism (3); a bracket (12) is installed at the end of the oil tank body (1), and a vacuum mechanism (4) is installed on the top of the bracket (12); one end of the vacuum mechanism (4) is connected to the interior of the oil tank body (1), and a condensing mechanism (5) is installed on the other end of the vacuum mechanism (4); one side of the vacuum mechanism (4) is connected to the heat dissipation mechanism (6), and the other end of the heat dissipation mechanism (6) is connected to the interior of the oil tank body (1), and the other end of the top of the oil tank body (1) is threadedly connected to an exhaust port (7).

2. A high and low pressure adjustable constant temperature hydraulic device as claimed in claim 1, characterized in that: The pressure compensation mechanism (2) comprises a connecting pipe (201) connected to the exhaust port (7); the other end of the connecting pipe (201) is connected to the interior of one end of the bottom of the pressure chamber (204) through a connecting head (202); a first piston (206) is arranged inside the pressure chamber (204); a first spring (205) is arranged at the top and bottom of the first piston (206); the first spring (205) is located inside the pressure chamber (204); a sliding rod (209) is inserted into the interior of the first piston (206); the top end of the sliding rod (209) is threadedly connected to the top end of the pressure chamber (204); the outer wall of the bottom end of the sliding rod (209) is slidably connected to the first piston (206); and the sliding rod (209) is inserted into the two springs inside the pressure chamber (204).

3. A high and low pressure adjustable constant temperature hydraulic device as claimed in claim 2, characterized in that: There are four pressure bins (204), which are arranged in a straight line with equal spacing. One side of the pressure bin (204) is welded to the surface of a fixing frame (207), and the fixing frame (207) is installed on the outer wall of the oil tank body (1) by bolts. A pressure relief port (208) is provided at one end of the top of the pressure bin (204), and adjacent pressure relief ports (208) are connected in series. A one-way valve (203) is provided at one end of the bottom of the pressure bin (204), and the one-way valves (203) are connected in series. The one-way valve (203) is connected to the pressure relief port (208) through a pipeline.

4. A high and low pressure adjustable constant temperature hydraulic device as claimed in claim 1, characterized in that: The pressure relief mechanism (3) comprises a threaded interface (301) connected to the one-way valve (203), the top end of the threaded interface (301) is connected to the bottom of the breathing tube (303), a second piston (306) is arranged inside the breathing tube (303), a hole groove is arranged on the middle outer wall of the second piston (306) and is connected to the hole groove at the bottom of the second piston (306), the outer wall of the second piston (306) is tightly fitted with the inner wall of the breathing tube (303), and the outer wall of the second piston (306) is in sliding contact with the inner wall of the breathing tube (303), the top and bottom of the second piston (306) are provided with a second spring (302), and the outer wall of the top end and the outer wall of the bottom end of the breathing tube (303) are regularly distributed with holes and grooves in annular shapes.

5. A high-low pressure adjustable constant temperature hydraulic device as claimed in claim 4, characterized in that: A partition (305) is welded to the middle of the outer wall of the breathing tube (303), and an outer shell (307) is welded to the top and bottom of the partition (305). A hole groove is opened on the surface of the outer shell (307), and one end of the outer shell (307) is threadedly connected to a connecting cover (311). A cavity exists between the inner wall of the outer shell (307) and the outer wall of the breathing tube (303), and a tubular filter (304) is inserted between the inner wall of the outer shell (307) and the outer wall of the breathing tube (303).

6. A high-low pressure adjustable constant temperature hydraulic device as claimed in claim 5, characterized in that: A spring at one end of the top of the breathing tube (303) contacts the bottom of the adjusting block (308), the outer wall of the adjusting block (308) is in sliding contact with the inner wall surface of the breathing tube (303), the top of the adjusting block (308) is rotatably connected to the bottom of the threaded rod (309), and the threaded rod (309) is threadedly connected to the top of the breathing tube (303), and a knob (310) is welded to the top of the threaded rod (309).

7. A high and low pressure adjustable constant temperature hydraulic device as claimed in claim 1, characterized in that: The vacuum mechanism (4) comprises a connecting oil pipe (401) connected to the oil tank body (1); the other end of the connecting oil pipe (401) is connected to the interior of a heating box (403); the top of the heating box (403) is connected to one end of the bottom of an exhaust pipe (404); the top of the exhaust pipe (404) is connected to a vacuum pump (402); the output end of the vacuum pump (402) is connected to an exhaust pipe (405); two groups of heating coils (406) are arranged inside the heating box (403), and the heating coils (406) are multi-bend.

8. A high-low pressure adjustable constant temperature hydraulic device as claimed in claim 1, characterized in that: The condensation mechanism (5) includes a curved pipe (503) connected to the inside of the heating box (403), one end of the bottom of the curved pipe (503) is connected to one end of the condenser pipe (508), the outside of the condenser pipe (508) is provided with a jacket (507), there is a cavity between the inner wall of the jacket (507) and the outer wall of the condenser pipe (508), one end of the jacket (507) is provided with a cold flow port (504), and the other end of the jacket (507) is provided with a hot flow port (506), the other end of the condenser pipe (508) is connected to the input end of the air pump (502), and the other end of the air pump (502) is connected to the return air pipe (501).

9. A high-low pressure adjustable constant temperature hydraulic device as claimed in claim 8, characterized in that: The return air pipe (501) is connected to one end of the heating box (403), the top end of the curved pipe (503) is inserted into the interior of the heating box (403), and one end of the curved pipe (503) extends to the other end inside the heating box (403), the curved pipe (503) is L-shaped, and the bottom of the condenser (508) is connected to the top of the water tank (505), and a cold water valve (509) is installed on one side of the water tank (505).

10. A high and low pressure adjustable constant temperature hydraulic device as claimed in claim 1, characterized in that: The heat dissipation mechanism (6) comprises a solenoid valve (601) connected to the interior of the heating box (403); the solenoid valve (601) is connected to one end of the main pipeline (602), and the other end of the main pipeline (602) is connected to the first water tank (603); a heat dissipation pipe (604) is provided on one side of the first water tank (603), and the interior of the heat dissipation pipe (604) is a hollow structure; the two ends of the heat dissipation pipe (604) are respectively connected to the first water tank (603) and the second water tank (606), and the second water tank (606) is connected to the interior of the oil tank body (1) through a circulation pump (607); a cooling fan (605) is installed on one side of the heat dissipation pipe (604).

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