CN115559948B

CN115559948B - Hydraulic system of vibroflotation device

Info

Publication number: CN115559948B
Application number: CN202211371123.7A
Authority: CN
Inventors: 张广彪; 张卫民; 耿荣; 王黎强
Original assignee: BEIJING VIBROFLOTATION ENGINEERING MACHINERY CO LTD
Current assignee: BEIJING VIBROFLOTATION ENGINEERING MACHINERY CO LTD
Priority date: 2022-11-03
Filing date: 2022-11-03
Publication date: 2023-04-18
Anticipated expiration: 2042-11-03
Also published as: CN115559948A

Abstract

The invention relates to a hydraulic system of a vibroflotation device, which comprises a main power pump, an oil cylinder pump, an air-cooled radiator, a hydraulic motor, an oil cylinder, a filtering device and an oil tank, wherein the oil tank is also provided with a dustproof and condensed water prevention device for preventing dust and condensed water from entering the oil tank. The hydraulic system of the vibroflotation device is a filter element which can not contact with the outside air and can be switched in a filtering device under the working state. Therefore, dust and condensed water cannot be generated in the hydraulic oil, and solid particles cannot exceed the standard. The hydraulic system of the vibroflotation device is high in cleanness, high in reliability and capable of working stably for a long time.

Description

Hydraulic system of vibroflotation device

Technical Field

The invention relates to a hydraulic system of a vibroflotation device, and belongs to the technical field of vibroflotation devices.

Background

The vibroflot is a special machine in vibroflot construction, and is provided with an electric vibroflot and a hydraulic vibroflot, which can generate horizontal vibration force to vibroflot filler and surrounding soil, thereby achieving the purposes of improving the bearing capacity of the foundation, reducing the settlement, improving the stability of the foundation and improving the anti-earthquake liquefaction capacity. For electronic vibroflotation device, under the condition of equal power density, the quality that hydraulic vibroflotation device drive motor is far less than the quality and the during operation of motor, hydraulic motor's rotational speed is adjusted conveniently, and the control range is also far higher than traditional motor to it is better to the closely knit effect of the produced vibration in stratum.

The hydraulic vibroflot is matched with a corresponding hydraulic system, and in order to keep the air pressure in an oil tank of the existing hydraulic system balanced, the hydraulic oil in the oil tank is connected with the atmosphere of the external environment. Hydraulic system can produce the heat at the operation in-process, can be with the air heating in the oil tank, and the steam in the air meets the lower fuel tank wall of temperature when external environment temperature changes, will form the comdenstion water on the inner wall of oil tank, and the comdenstion water drips into hydraulic oil, will destroy the quality of hydraulic oil. Therefore, the hydraulic oil of the existing hydraulic system needs to be replaced at intervals, and the hydraulic oil is subjected to water removal and impurity removal.

The operation of replacing the hydraulic oil is time-consuming and labor-consuming, meanwhile, the residual hydraulic oil usually contains a large amount of water, the oil way needs to be flushed with new oil for a period of time for ensuring the complete replacement, and the cost is high.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a hydraulic system of a vibroflotation device, which has the following specific technical scheme:

the utility model provides a hydraulic system of vibroflotation device, includes main power pump, hydro-cylinder pump, air-cooled radiator, is used for driving air-cooled radiator's hydraulic motor, hydro-cylinder, is used for filtering oil circuit filter equipment, oil tank, the input and the oil tank intercommunication of main power pump, the input and the oil tank intercommunication of hydro-cylinder pump, the output and the hydro-cylinder of hydro-cylinder pump are connected, hydraulic motor's input and main power pump's output intercommunication, hydraulic motor's the output and the oil return end of hydro-cylinder all communicate with filter equipment's oil feed end, filter equipment's the oil end that produces oil and air-cooled radiator's oil feed end intercommunication, air-cooled radiator's the end that produces oil and oil tank intercommunication, oil tank department still is provided with the dustproof anti-condensation water installation that prevents dust and comdenstion water and get into the oil tank inside.

As an improvement of the above technical scheme, the dustproof and anti-condensation water device comprises a gas cylinder filled with protective gas, a partition plate is arranged inside the oil tank, the inside of the oil tank is divided into an oil storage area for storing oil and a functional area located above the oil storage area by the partition plate, the functional area comprises a gas cylinder placing chamber for placing the gas cylinder, a protective gas-air balance chamber and a dust removal chamber, a piston plate is arranged inside the protective gas-air balance chamber, the inside of the protective gas-air balance chamber is divided into a protective gas chamber and an air chamber by the piston plate, a bottle opening of the gas cylinder is provided with a pressure reducing valve, a side wall of the protective gas chamber is provided with an air inlet valve, the air inlet valve is arranged on one side of the piston plate, an output end of the pressure reducing valve is communicated with the protective gas chamber through the air inlet valve, a vent valve for connecting the protective gas chamber and the air chamber is embedded in the middle area of the piston plate, a vent hole is arranged between the air chamber and the dust removal chamber, an air filter is fixedly arranged inside of the dust removal chamber, the air filter is arranged above the vent hole, a rainproof vent valve is embedded on the top of the dust removal chamber; a connecting pipe is arranged between the protective gas bin and the oil storage area; an oil inlet and an oil outlet which are communicated with an oil storage area are arranged outside the oil tank, the oil outlet is arranged below the oil inlet, an oil inlet valve is connected to the oil inlet, an oil outlet valve is connected to the oil outlet, the input end of the main power pump and the input end of the oil cylinder pump are both connected with the oil outlet valve, and the oil outlet end of the air-cooled radiator is connected with the oil inlet valve; the inside top-down of oil tank has set gradually polylith wave form guide plate, and two adjacent wave form guide plates are crisscross setting, the contained angle between the length direction of wave form guide plate and the direction of height of oil tank is the acute angle.

As an improvement of the above technical scheme, an oil discharge port is arranged at the bottom of the oil tank, a slope located at the bottom of the oil tank is arranged inside the oil tank, and the lowest end of the slope points to the oil discharge port; the dustproof and anti-condensation device further comprises a gas replacement valve, a ventilating hole is formed in the side wall of the oil tank and is formed above the oil discharge port, one end of the gas replacement valve is communicated with the output end of the pressure reducing valve, and the other end of the gas replacement valve is communicated with the ventilating hole.

As an improvement of the technical scheme, the filtering device comprises an electric three-way valve and two filtering branches, each filtering branch comprises an oil way filter and a one-way valve, one end of each oil way filter is communicated with the electric three-way valve, and the input end of each one-way valve is communicated with the other end of each oil way filter.

As an improvement of the technical scheme, the air inlet valve and the air outlet valve are both travel switch valves, a first contact rod for controlling the on-off of the air inlet valve is fixedly connected to the side wall of the piston plate, and a second contact rod for controlling the on-off of the air outlet valve is fixedly connected to the inner wall of the air bin.

As an improvement of the above technical solution, the stroke switch valve includes a cylindrical valve body, a first circular hole, a second circular hole, and a third circular hole are sequentially disposed in the center of the valve body, the aperture of the second circular hole is larger than the aperture of the third circular hole, the aperture of the third circular hole is larger than the aperture of the first circular hole, a cylindrical coil spring and a sealing plate for sealing the third circular hole are disposed inside the second circular hole, the sealing plate is of a circular structure, the cylindrical coil spring is disposed between the sealing plate and the first circular hole, a sealing ring is disposed between the side of the second circular hole close to the third circular hole and the sealing plate, the sealing ring is fixedly connected to the sealing plate, a guide rod perpendicularly connected to the sealing plate is further disposed outside the second circular hole, the guide rod is of a cylindrical structure, the head end of the guide rod is fixedly connected to the sealing plate, the tail end of the guide rod passes through the third circular hole, and the tail end of the guide rod is located outside the third circular hole; the diameter of shrouding is greater than the diameter of first round hole, the diameter of shrouding is less than the diameter of second round hole, the diameter of shrouding is greater than the diameter of third round hole, the diameter of third round hole is greater than the diameter of guide bar.

As an improvement of the above technical solution, the waveform guide plate is a sine wave structure, the wavelength of the sine wave structure is λ, the amplitude of the sine wave structure is h, x = λ/h, and x is greater than or equal to 1.5 and less than or equal to 2.5.

As an improvement of the technical scheme, the included angle between the length direction of the wave-shaped guide plate and the height direction of the oil tank is alpha, and alpha is more than or equal to 60 degrees and less than or equal to 80 degrees.

As an improvement of the above technical solution, α =72 °, and x =2.1.

As an improvement of the technical scheme, the protective gas is one or more of nitrogen, carbon dioxide and inert gas.

The invention has the beneficial effects that:

the hydraulic system of the vibroflotation device is a filter element which can not contact with the outside air and can be switched in a filtering device under the working state. Therefore, dust and condensed water cannot be generated in the hydraulic oil, and solid particles cannot exceed the standard. The hydraulic system of the vibroflotation device is high in cleanness, high in reliability and capable of working stably for a long time.

Drawings

Fig. 1 is a schematic structural diagram of a hydraulic system of the vibroflot;

FIG. 2 is a schematic view of the dustproof and waterproof device according to the present invention when hydraulic oil is filled therein;

FIG. 3 is a schematic view of the dustproof and anti-condensation device of the present invention without hydraulic oil inside;

FIG. 4 is a schematic structural view of the travel switch valve of the present invention;

fig. 5 is a schematic structural view of the wave guide plate of example 6;

FIG. 6 is a schematic structural view of a wave baffle according to example 7;

fig. 7 is a schematic structural view of the wave guide plate of example 8;

fig. 8 is a schematic structural view of the wave baffle of example 9;

fig. 9 is a graph of the α value versus the η value.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and to simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1, the hydraulic system of the vibroflotation device includes a main power pump 11, an oil cylinder pump 12, an air-cooled radiator 17, a hydraulic motor 13 for driving the air-cooled radiator 17, an oil cylinder 18, a filter device for filtering an oil path, and an oil tank 21, wherein an input end of the main power pump 11 is communicated with the oil tank 21, an input end of the oil cylinder pump 12 is communicated with the oil tank 21, an output end of the oil cylinder pump 12 is connected with the oil cylinder 18, an input end of the hydraulic motor 13 is communicated with an output end of the main power pump 11, an output end of the hydraulic motor 13 and an oil return end of the oil cylinder 18 are both communicated with an oil inlet end of the filter device, an oil outlet end of the filter device is communicated with an oil inlet end of the air-cooled radiator 17, an oil outlet end of the air-cooled radiator 17 is communicated with the oil tank 21, and a dustproof and condensed water prevention device 20 for preventing dust and condensed water from entering the oil inside the oil tank 21 is further disposed at the oil tank 21.

The main power pump 11 provides hydraulic power for the operation of the vibroflot, and has high output pressure (generally 32-35 MP) and large flow (generally not lower than 200L/M).

The fan of the air-cooled radiator 17 is directly driven by the hydraulic motor 13 fixed under the radiator fin.

After hydraulic oil in the oil tank 21 passes through the main power pump 11 and the hydraulic motor 13, solid particles in an oil path are filtered by the filtering device, after the hydraulic oil passes through the oil cylinder pump 12 and the oil cylinder 18, the solid particles in the oil path are filtered by the filtering device, after the hydraulic oil is filtered by the filtering device, the heat is dissipated through the air-cooled radiator 17, and finally, dust and condensed water can be prevented from entering the oil tank 21 under the action of the dustproof condensed water prevention device 20 at the oil tank 21.

Example 2

Based on embodiment 1, as shown in fig. 1 to 3, the dustproof and waterproof device 20 includes a gas cylinder 25 filled with a shielding gas, a gas tank 21, a partition 22 is disposed inside the gas tank 21, the inside of the gas tank 21 is partitioned by the partition 22 into a storage area 23 for storing oil, and a functional area located above the storage area 23, the functional area includes a gas cylinder placing chamber 24 for placing a gas cylinder 25, a shielding gas-air balance chamber 26, and a dust removal chamber 28, the shielding gas-air balance chamber 26 is internally provided with a piston plate 27, the shielding gas-air balance chamber 26 is partitioned by the piston plate 27 into a shielding gas chamber 261 and an air chamber 262, a mouth of the gas cylinder 25 is provided with a pressure reducing valve 251, a side wall of the shielding gas chamber 261 is provided with a gas inlet valve 241, the gas inlet valve 241 is disposed on one side of the piston plate 27, an output end of the pressure reducing valve 251 is communicated with the shielding gas chamber 261 through the gas inlet valve 241, a middle area of the air chamber 27 is embedded with a gas outlet valve 261 for connecting the shielding gas chamber 261 and the air chamber 262, a vent port 271 is disposed between the air chamber 271 and the air chamber 28, an internal fixing air filter 283 is disposed above the dust removal chamber 282, and the dust removal valve 282 is disposed above the rain-proof filter 282, and the dust removal chamber 282 is disposed above the rain-proof filter 282; a connecting pipe 221 is arranged between the protective gas bin 261 and the oil storage area 23; an oil inlet 231 and an oil outlet 232 communicated with the oil storage area 23 are arranged outside the oil tank 21, the oil outlet 232 is arranged below the oil inlet 231, the oil inlet 231 is connected with an oil inlet valve 19, the oil outlet 232 is connected with an oil outlet valve 110, the input end of the main power pump 11 and the input end of the oil cylinder pump 12 are both connected with the oil outlet valve 110, and the oil outlet end of the air-cooled radiator 17 is connected with the oil inlet valve 19; the inside top-down of oil tank 21 has set gradually polylith wave form guide plate 210, and two adjacent wave form guide plates 210 are the setting of staggering, the contained angle between the length direction of wave form guide plate 210 and the direction of height of oil tank 21 is the acute angle.

When the dustproof and anti-condensation water device 20 works, the protective gas bin 261 is filled with protective gas, and the protective gas comes from the protective gas in the gas cylinder 25; due to the connection pipe 221, the oil tank 21 is also filled with shielding gas, and the pressure in the oil tank 21 and the shielding gas chamber 261 is equal. The air bin 262 is communicated with the dust chamber 28 through the vent 281, the rain-proof vent valve 283 is mainly used for preventing rain water from entering the dust chamber 28, and the rain-proof vent valve 283 is mainly arranged for ensuring that the dust chamber 28 is communicated with the outside atmosphere; the air filter 282 is mainly for filtering dust in air.

When the hydraulic system of the vibroflotation device works, the oil quantity in the oil tank 21 can be changed continuously along with the working states of the oil cylinder 18, the hydraulic motor 13 and the like.

In the dust-proof and condensed water-proof device 20, the intake valve 241 and the exhaust valve 271 are in a closed state in a normal state. When the amount of oil is reduced, the oil storage area 23 is in a negative pressure state, and at this time, in order to keep the pressure in the oil storage area 23 balanced with the external pressure, the piston plate 27 moves toward the air intake valve 241, so as to press the shielding gas in the shielding gas chamber 261 into the oil storage area 23, and at the same time, the external air enters the air chamber 262 through the air filter 282 via the rain-proof ventilation valve 283, so as to keep the pressure between the shielding gas chamber 261 and the air chamber 262 at the same level. When the hydraulic oil in the oil storage area 23 is greatly reduced, the piston plate 27 moves to the direction close to the air inlet valve 241 until the air inlet valve 241 is touched to be opened, and the shielding gas in the gas cylinder 25 is decompressed by the pressure reducing valve 251, is supplemented into the shielding gas bin 261 through the air inlet valve 241 and is further supplemented into the oil storage area 23; finally, the pressure between the protection air bin 261 and the air bin 262 is ensured to be in dynamic balance.

When the hydraulic oil flows back, the oil amount in the oil tank 21 increases, the pressure in the oil storage area 23 increases, the shielding gas in the oil storage area 23 enters the shielding gas chamber 261, the piston plate 27 is pushed to move towards the dust removing chamber 28, the air inlet valve 241 is closed, and the redundant air in the air chamber 262 is exhausted from the rain-proof vent valve 283 through the air filter 282. When a large amount of hydraulic oil flows back, the shielding gas entering the shielding gas chamber 261 pushes the piston plate 27 to move towards the direction close to the dust chamber 28 until the piston plate touches the exhaust valve 271 and the exhaust valve 271 is opened, the shielding gas in the shielding gas chamber 261 is discharged into the air chamber 262 and then discharged out of the dust chamber 28, and therefore the shielding gas in the oil tank 21 and the external air pressure are in dynamic balance.

If the desiccant is placed in the oil storage area 23 to remove moisture in the air, the operation of replacing the desiccant each time is particularly complicated, and the desiccant is easy to drop into the hydraulic oil in the oil tank after long-term use, so that the hydraulic oil is polluted by desiccant particles; in addition, the contact area of the drying agent and the moisture in the air is limited, and the condensed water in the oil tank cannot be thoroughly discharged.

If the protection gas-air balance chamber 26 is replaced by an air bag, although the purpose of balancing the air pressure in the oil storage area 23 can be achieved, the air bag is easy to damage, and the service life is reduced due to the fact that the air bag is easy to age due to frequent expansion and contraction; once the airbag is over-inflated and bursts open, external air may eventually enter the oil reservoir 23, resulting in the production of condensed water.

In the present invention, even if the air pressure in the protection air chamber 261 is too high due to the damage of the air inlet valve 241, the protection air in the air bottle 25 is continuously filled into the protection air chamber 261, so that the piston plate 27 moves to a position close to the dust removal chamber 28, the exhaust valve 271 is opened, and the excessive protection air is exhausted to the outside; when the shielding gas in the gas cylinder 25 is completely discharged, the air pressure balance between the shielding gas chamber 261 and the air chamber 262 is achieved again, the piston plate 27 is separated from the dust removing chamber 28 by a certain distance, so that the exhaust valve 271 is closed again, the oil storage area 23 is always sealed and protected by the shielding gas-air balance chamber 26, the outside air is prevented from entering, and the shielding gas-air balance chamber 26 cannot be damaged due to overshoot. The shield gas-air balance chamber 26 is still available even if overshooting, so that it is ensured that the oil reservoir 23 is always filled with shield gas, so that the formation of condensation water is avoided.

Wave form guide plate 210 is the slope in the oil tank 21, and after the hydraulic oil of backward flow got into oil tank 21, hydraulic oil can be flat on wave form guide plate 210 and scatter, and slow level downflow can prolong hydraulic oil flow time like this, plays the cooling and does on the one hand, simultaneously because hydraulic oil scatters on the guide plate to fine bubble spills over in better faster with hydraulic oil. A certain number of fine holes (round holes with the aperture of 1.5-2.5 mm) are uniformly distributed on the upper half section of the wave-shaped guide plate 210; after air overflows from the oil, the oil can return to the top of the oil tank through the fine holes, so that air cannot be retained below the wave-shaped guide plate 210. Finally, the liquid in the oil tank avoids cavitation to the maximum extent, and the smoothness of pressure transmission in work is ensured.

If the pore diameter of the fine pores is too large (e.g. 3 mm), oil drops are easily formed in the fine pores, thereby affecting the final defoaming efficiency. If the pore diameter of the fine pores is too small (e.g., 1 mm), the air-bleeding effect of the hydraulic oil at the fine pores is weakened, thereby affecting the final defoaming rate.

Example 3

Based on embodiment 2, the bottom of the oil tank 21 is provided with an oil discharge port 212, the inside of the oil tank 21 is provided with a slope 211 positioned at the bottom of the oil tank 21, and the lowest end of the slope 211 points to the oil discharge port 212; the dustproof and condensed water prevention device 20 further comprises a gas replacement valve 29, a side wall of the oil tank 21 is provided with a ventilation hole, the ventilation hole is arranged above the oil discharge port 212, one end of the gas replacement valve 29 is communicated with an output end of the pressure reducing valve 251, and the other end of the gas replacement valve 29 is communicated with the ventilation hole.

When oil drainage is needed, opening a hole plug at the oil drainage port 212 for oil drainage; the slope 211 is arranged to facilitate oil drainage.

The shielding gas in the gas cylinder 25 is reduced to 0.2 mpa by a pressure reducing valve 251. When the air in the oil storage area 23 is ventilated in the initial stage, the air replacement valve 29 is opened, the protective air output from the pressure reducing valve 251 enters the oil tank 21 and overflows from the hydraulic oil to the oil storage area 23; wherein the protective gas is one or more of nitrogen, carbon dioxide and inert gas. The inert gas refers to a simple substance of a gas corresponding to all the group 0 elements on the periodic table of the elements, and is also called a rare gas. In this embodiment, a gas having a density greater than that of air, such as nitrogen; because the density of the nitrogen is greater than that of the air, the overflowed nitrogen extrudes the air or the gas containing water from bottom to top out of the oil storage area 23 and the protective gas-air balance chamber 26; finally, the oil storage area 23 and the shielding gas tank 261 are filled with nitrogen gas, and contain no air, so that the initial replacement gas operation is completed, and the gas replacement valve 29 is closed. And the hydraulic system of the vibroflotation device enters a normal use state.

Example 4

As shown in fig. 1, the filtering device includes an electric three-way valve 14, and two filtering branches including an oil filter 15 and a check valve 16, wherein one end of the oil filter 15 is communicated with the electric three-way valve 14, and an input end of the check valve 16 is communicated with the other end of the oil filter 15.

The electric three-way valve 14 has three ports, two of which are respectively communicated with one end of the oil filter 15, and the last port is communicated with the output end of the hydraulic motor 13 and the oil return end of the oil cylinder 18. The output end of the one-way valve 16 is communicated with the oil inlet end of the air-cooled radiator 17, and the one-way valve 16 is used for preventing the filtered oil from returning. The filtering branch further comprises a pressure gauge located between the oil way filter 15 and the one-way valve 16 and used for monitoring hydraulic pressure between the oil way filter 15 and the one-way valve 16, and when the pressure is abnormal, the electric three-way valve 14 is switched, so that the two filtering branches operate independently respectively, and the phenomenon that one filtering branch cannot perform filtering operation due to blocking is avoided.

The filtering branch of the double-way oil way can ensure that a hydraulic system works uninterruptedly, and when a filter element is blocked due to long-term work of the hydraulic station, the electric three-way valve 14 can automatically switch the other set of oil way filter to an oil inlet way, so that the hydraulic station is ensured to be not stopped and to run stably for a long time. And the blocked filter element is switched to be in a state of open circuit to be replaced at the moment, and the normal operation of the hydraulic system is not influenced.

Example 5

The intake valve 241 and the exhaust valve 271 are both travel switch valves, a first contact rod 242 for controlling the on-off of the intake valve 241 is fixedly connected to the side wall of the piston plate 27, and a second contact rod 272 for controlling the on-off of the exhaust valve 271 is fixedly connected to the inner wall of the air chamber 262.

As shown in fig. 4, the stroke switch valve includes a cylindrical valve body 31, a first circular hole 32, a second circular hole 33, and a third circular hole 34 are sequentially formed in the center of the valve body 31, the aperture of the second circular hole 33 is larger than the aperture of the third circular hole 34, the aperture of the third circular hole 34 is larger than the aperture of the first circular hole 32, a cylindrical coil spring 35 and a sealing plate 36 for sealing the third circular hole 34 are disposed inside the second circular hole 33, the sealing plate 36 is of a circular structure, the cylindrical coil spring 35 is disposed between the sealing plate 36 and the first circular hole 32, a sealing ring 38 is disposed between the sealing plate 36 and the side of the second circular hole 33 close to the third circular hole 34, the sealing ring 38 is fixedly connected to the sealing plate 36, a guide rod 37 perpendicularly connected to the sealing plate 36 is further disposed outside the second circular hole 33, the guide rod 37 is of a cylindrical structure, the head end of the guide rod 37 is fixedly connected to the sealing plate 36, the tail end of the guide rod 37 passes through the third circular hole 34, and the tail end of the guide rod 37 is located outside the third circular hole 34; the diameter of the sealing plate 36 is larger than that of the first round hole 32, the diameter of the sealing plate 36 is smaller than that of the second round hole 33, the diameter of the sealing plate 36 is larger than that of the third round hole 34, and the diameter of the third round hole 34 is larger than that of the guide rod 37.

The intake valve 241 and the exhaust valve 271 are both in a closed state under the action of the cylindrical coil spring 35 in a normal state; at this time, the sealing plate 36 seals the third circular hole 34, and the sealing ring 38 can improve the sealing property. When the first contact rod 242 or the second contact rod 272 touches the guide rod 37, the guide rod 37 pushes the sealing plate 36 to move towards the direction close to the first circular hole 32, so that a certain gap exists between the sealing plate 36 and the third circular hole 34, that is, the stroke switch valve is opened at this time, and is in an open state.

The structure of the travel switch valve is easily triggered by the first contact rod 242 or the second contact rod 272 in the invention. Even if the travel switch valve cannot be opened by the air pressure at the third circular hole 34 or the first circular hole 32, the travel switch valve can be opened only by whether the first contact rod 242 or the second contact rod 272 touches and pushes the guide rod 37; when the guide rod 37 is not pushed, the guide rod is always in a closed state under the action of the cylindrical coil spring 35.

Example 6

In this embodiment, the wave-shaped guide plate 210 has a sine wave structure, as shown in fig. 5, the wavelength of the sine wave structure is λ, the amplitude of the sine wave structure is h, x = λ/h, and x is greater than or equal to 1.5 and less than or equal to 2.5.

The size of x will affect the structure of the sine wave structure (such as the depth of the wave, the residence time of the hydraulic oil on the surface of the wave guide plate 210, and the effect on the surface tension), and also affect the defoaming effect.

In some embodiments, the included angle between the length direction of the wave-shaped guide plate 210 and the height direction of the oil tank 21 is α, and α is greater than or equal to 60 ° and less than or equal to 80 °.

When x =2.1, α is changed, and the test is performed according to "defoaming performance test", and a graph between a corresponding η value and an α value is shown in fig. 9, and it can be seen that: when the alpha = 72-78 degrees, eta is larger than 97%. Further, when α =72 °, ∈ =7.9mm/min; when α =78 °, ε =5.7mm/min; when α =78 °, ε =6.3mm/min; therefore, preferably, α =72 °.

When alpha =72 degrees, changing x, and testing according to defoaming performance test, wherein the corresponding eta value is shown in table 1:

TABLE 1

x	η(％)
		1.5	80.8
2.0	90.5
		2.1	97.3
2.2	85.6
		2.5	69.7

As can be seen from Table 1: when x =2.1, the wave-shaped structure of the wave-shaped guide plate 210 is more reasonable.

Example 7

In this embodiment, the wave-shaped baffle 210 has a square wave structure, as shown in fig. 6. The test was carried out according to "defoaming performance test" and the maximum value of η was 73%.

Example 8

In this embodiment, the wave-shaped baffle 210 has a triangular wave structure, as shown in fig. 7. The maximum value of eta is 51 percent according to the defoaming performance test.

Example 9

In this embodiment, the wave-shaped deflector 210 has a semi-circular wave structure (a wave unit formed by two semi-circles), as shown in fig. 8. The maximum value of eta is 66 percent according to the defoaming performance test.

Comparative example 1

The wave-shaped guide plate 210 is replaced by a light plate, and the included angle between the length direction of the light plate and the height direction of the oil tank 21 is alpha, and alpha =90 degrees.

The test was performed according to "defoaming performance test", η =12.6%, and ∈ =1.1mm/min.

Comparative example 2

The wave-shaped guide plate 210 is replaced by a light plate, and the included angle between the length direction of the light plate and the height direction of the oil tank 21 is alpha, and alpha =72 degrees.

The test was performed according to "defoaming performance test", η =9.3%, and ∈ =0.8mm/min.

In the above embodiment, the hydraulic system of the vibroflotation device is a hydraulic oil which does not contact with the outside air and can switch the filter element in the filter device under the working state. Therefore, dust and condensed water cannot be generated in the hydraulic oil, and solid particles cannot exceed the standard. The hydraulic system of the vibroflotation device is high in cleanness, high in reliability and capable of working stably for a long time.

Experimental on defoaming Property

The wave-shaped guide plate 210 is arranged in the simulation oil tank 21 in the transparent cylinder, and the included angle between the length direction of the wave-shaped guide plate 210 and the height direction of the transparent container is also alpha.

Putting the hydraulic oil in a transparent groove, stirring and dispersing by using a disperser, stirring for 30min at the stirring speed of 2000r/min to generate a large amount of foam on the surface of the hydraulic oil, and standing until the thickness of a foam layer on the surface of the hydraulic oil in the transparent groove is not reduced within 5 min; the thickness of the foam layer on the surface of the hydraulic oil in the transparent tank at this time was recorded as d ₁ 。

Then, the hydraulic oil in the transparent groove is poured into the transparent cylinder from the cylinder opening of the transparent cylinder, the hydraulic oil with foam flows downwards along the waveform guide plate 210 and is finally converged at the bottom of the transparent cylinder, after the hydraulic oil is poured out, the transparent groove and the transparent cylinder are both kept still for 10min, and the thickness d of the foam layer remained in the transparent groove is recorded ₂ The thickness of the foam layer on the surface of the hydraulic oil in the transparent cylinder is d ₃ 。

η＝(d ₁ -d ₂ -d ₃ )/(d ₁ -d ₂ ) (ii) a Eta is defoaming efficiency.

ε＝(d ₁ -d ₂ -d ₃ ) 10; ε is the defoaming rate.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a hydraulic system of vibroflotation device, includes main power pump (11), hydro-cylinder pump (12), air-cooled radiator (17), hydraulic motor (13) that are used for driving air-cooled radiator (17), hydro-cylinder (18), filter equipment, oil tank (21) that are used for filtering the oil circuit, the input and the oil tank (21) intercommunication of main power pump (11), the input and the oil tank (21) intercommunication of hydro-cylinder pump (12), the output and the hydro-cylinder (18) of hydro-cylinder pump (12) are connected, the input of hydraulic motor (13) and the output of main power pump (11) intercommunication, the output of hydraulic motor (13) and the oil return of hydro-cylinder (18) all communicate with filter equipment's oil feed end, filter equipment's the oil outlet end and the oil feed of air-cooled radiator (17) intercommunication, the oil outlet of air-cooled radiator (17) communicates with oil tank (21), its characterized in that: the oil tank (21) is also provided with a dustproof and condensed water prevention device (20) for preventing dust and condensed water from entering the oil tank (21);

the dustproof and anti-condensation water device (20) comprises a gas cylinder (25) filled with protective gas, a partition plate (22) is arranged inside an oil tank (21), the inside of the oil tank (21) is divided into an oil storage area (23) used for storing oil and a functional area above the oil storage area (23) by the partition plate (22), the functional area comprises a gas cylinder placing chamber (24) used for placing the gas cylinder (25), a protective gas-air balance chamber (26) and a dust removal chamber (28), a piston plate (27) is arranged inside the protective gas-air balance chamber (26), the inside of the protective gas-air balance chamber (26) is divided into a protective gas chamber (261) and an air chamber (262) by the piston plate (27), a bottle opening of the protective gas chamber (261) is provided with a pressure reducing valve (251), a side wall of the protective gas chamber (261) is provided with the gas inlet valve (241), the gas inlet valve (241) is arranged on one side of the piston plate (27), the output end of the pressure reducing valve (251) is communicated with the protective gas cylinder (261) through the gas inlet valve (241), a middle gas embedding area (27) used for connecting the protective gas chamber (261) with the air removal chamber (281), and the air outlet (281) is arranged between the air chamber (271), an air filter (282) is fixedly installed inside the dust chamber (28), the air filter (282) is arranged above the air vent (281), a rainproof ventilation valve (283) is embedded in the top of the dust chamber (28), and the rainproof ventilation valve (283) is arranged above the air filter (282); a connecting pipe (221) is arranged between the protective gas bin (261) and the oil storage area (23); an oil inlet (231) and an oil outlet (232) communicated with an oil storage area (23) are formed in the outer portion of the oil tank (21), the oil outlet (232) is formed below the oil inlet (231), an oil inlet valve (19) is connected to the oil inlet (231), an oil outlet valve (110) is connected to the oil outlet (232), the input end of the main power pump (11) and the input end of the oil cylinder pump (12) are both connected with the oil outlet valve (110), and the oil outlet end of the air-cooled radiator (17) is connected with the oil inlet valve (19); the inside top-down of oil tank (21) has set gradually polylith wave form guide plate (210), and two adjacent wave form guide plates (210) are the staggered arrangement, contained angle between the length direction of wave form guide plate (210) and the direction of height of oil tank (21) is the acute angle.

2. The hydraulic system of a vibroflot, as set forth in claim 1, wherein: an oil discharge port (212) is formed in the bottom of the oil tank (21), a slope (211) located at the bottom of the oil tank (21) is arranged inside the oil tank (21), and the lowest end of the slope (211) points to the oil discharge port (212); the dustproof and anti-condensation device (20) further comprises a gas replacement valve (29), a ventilating hole is formed in the side wall of the oil tank (21), the ventilating hole is formed above the oil discharge opening (212), one end of the gas replacement valve (29) is communicated with the output end of the pressure reducing valve (251), and the other end of the gas replacement valve (29) is communicated with the ventilating hole.

3. The hydraulic system of a vibroflot, as set forth in claim 1, wherein: the filtering device comprises an electric three-way valve (14) and two filtering branches, wherein each filtering branch comprises an oil path filter (15) and a one-way valve (16), one end of each oil path filter (15) is communicated with the electric three-way valve (14), and the input end of each one-way valve (16) is communicated with the other end of each oil path filter (15).

4. The hydraulic system of a vibroflot, as set forth in claim 1, wherein: the air inlet valve (241) and the air outlet valve (271) are both travel switch valves, a first contact rod (242) used for controlling the on-off of the air inlet valve (241) is fixedly connected to the side wall of the piston plate (27), and a second contact rod (272) used for controlling the on-off of the air outlet valve (271) is fixedly connected to the inner wall of the air chamber (262).

5. The hydraulic system of a vibroflot, as set forth in claim 4, wherein: the stroke switch valve comprises a cylindrical valve body (31), a first round hole (32), a second round hole (33) and a third round hole (34) are sequentially formed in the center of the valve body (31), the aperture of the second round hole (33) is larger than that of the third round hole (34), the aperture of the third round hole (34) is larger than that of the first round hole (32), a cylindrical spiral spring (35) and a sealing plate (36) used for sealing the third round hole (34) are arranged inside the second round hole (33), the sealing plate (36) is of a circular structure, the cylindrical spiral spring (35) is arranged between the sealing plate (36) and the first round hole (32), a sealing ring (38) is arranged between the side, close to the third round hole (34), of the second round hole (33) and the sealing plate (36), the sealing ring (38) is fixedly connected with the sealing plate (36), a guide rod (37) vertically connected with the sealing plate (36) is further arranged outside the second round hole (33), the guide rod (37) is of a cylindrical structure, the guide rod (37) and the tail end of the guide rod (37) is fixedly connected with the end of the third round hole (34), and the guide rod (37) is located outside the third round hole (34); the diameter of the sealing plate (36) is larger than that of the first round hole (32), the diameter of the sealing plate (36) is smaller than that of the second round hole (33), the diameter of the sealing plate (36) is larger than that of the third round hole (34), and the diameter of the third round hole (34) is larger than that of the guide rod (37).

6. The hydraulic system of a vibroflot, as set forth in claim 1, wherein: the wave-shaped guide plate (210) is of a sine wave structure, the wavelength of the sine wave structure is lambda, the amplitude of the sine wave structure is h, x = lambda/h, and x is larger than or equal to 1.5 and smaller than or equal to 2.5.

7. The hydraulic system of a vibroflot, as set forth in claim 6, wherein: the included angle between the length direction of the wave-shaped guide plate (210) and the height direction of the oil tank (21) is alpha which is more than or equal to 60 degrees and less than or equal to 80 degrees.

8. The hydraulic system of a vibroflot, as set forth in claim 7, wherein: α =72 °, x =2.1.

9. The hydraulic system of a vibroflot, as set forth in claim 1, wherein: the protective gas is one or more of nitrogen, carbon dioxide and inert gas.