CN112696393B

CN112696393B - Hydraulic system of crushing and screening mixing bucket

Info

Publication number: CN112696393B
Application number: CN202011422854.0A
Authority: CN
Inventors: 方战强; 陈俊毅; 易云强; 陈翔欣
Original assignee: Guangzhou Runfang Environmental Protection Technology Co ltd
Current assignee: Guangzhou Runfang Environmental Protection Technology Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2022-05-10
Anticipated expiration: 2040-12-08
Also published as: CN112696393A

Abstract

The invention discloses a hydraulic system of a crushing and screening mixing bucket, which comprises a hydraulic motor, an oil pipeline and an oil compensator, wherein the oil pipeline is used for communicating the hydraulic motor with a hydraulic system on an excavator, and the oil compensator is connected with the hydraulic motor and is used for providing oil compensation for the hydraulic motor. According to the hydraulic system of the crushing and screening mixing hopper, the hydraulic motor can be prevented from being damaged due to the fact that the hydraulic motor is sucked.

Description

Hydraulic system of crushing and screening mixing bucket

Technical Field

The invention relates to a hydraulic system, in particular to a hydraulic system of a crushing and screening mixing hopper.

Background

The crushing and screening mixing bucket is an engineering mechanical device similar to a common excavator bucket in appearance, and due to the built-in crushing and screening device, the functions of excavation, crushing, screening, shoveling, mixing and the like are integrated, so that the application scene of the device is greatly improved, and the device is widely applied to industries such as mining, mineral processing, waste building concrete treatment, polluted soil remediation and the like.

Crushing and screening mixing buckets are usually driven by an excavator or a loader. Taking the excavator as an example, specifically, crushing and screening mixing hopper is provided with hydraulic motor, and hydraulic motor's input and the hydraulic pump on the excavator intercommunication, hydraulic motor's output and the oil tank intercommunication on the excavator, hydraulic pump with the hydraulic oil pump in the oil tank in the hydraulic motor to drive hydraulic motor operation, thereby hydraulic motor drive crushing and screening mixing hopper work. The hydraulic system of the existing crushing, screening and mixing hopper has the following defects: after the hydraulic pump on the excavator stops operating, the hydraulic motor can continue operating for a period of time because of inertia, because the hydraulic pump can not continue pumping oil to the hydraulic motor, and then leads to the hydraulic motor can the phenomenon of resorption to cause the hydraulic motor to damage easily.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a hydraulic system of a crushing and screening mixing bucket, which can avoid the damage to a hydraulic motor due to the suction phenomenon of the hydraulic motor.

According to the embodiment of the invention, the hydraulic system of the crushing and screening mixing bucket comprises:

a hydraulic motor;

the oil pipeline is used for communicating the hydraulic motor with a hydraulic system on the excavator;

and the oil liquid compensator is connected with the hydraulic motor and is used for providing oil liquid compensation for the hydraulic motor.

The crushing and screening mixing bucket hydraulic system provided by the embodiment of the invention at least has the following technical effects:

hydraulic system on the excavator is provided with oil tank and hydraulic pump, and the fluid pipeline is with hydraulic motor and oil tank, hydraulic pump intercommunication, and the hydraulic pump is gone into hydraulic motor with the hydraulic oil pump in the oil tank to drive hydraulic motor operation, thereby hydraulic motor drive crushing screening mixing hopper work, later in the fluid of hydraulic motor output gets back to the oil tank again. According to the crushing and screening hybrid bucket hydraulic system disclosed by the embodiment of the invention, after the hydraulic pump stops running, the hydraulic motor can continue to run for a period of time due to inertia, at the moment, the oil compensator can provide oil compensation for the hydraulic motor, namely, the oil compensator can input oil into the hydraulic motor, so that the hydraulic motor can be prevented from being damaged due to the phenomenon of air suction.

According to some embodiments of the invention, the hydraulic motors are two, both of the hydraulic motors being bidirectional hydraulic motors.

According to some embodiments of the present invention, the oil pipeline includes a three-position four-way valve, a first main pipe and a second main pipe, the three-position four-way valve is provided with an oil inlet P, an oil return port T, a working port a and a working port B, one end of the first main pipe is connected to the working port a, the other end of the first main pipe is provided with two first branch pipes, the two first branch pipes are respectively connected to one ends of the two hydraulic motors, one end of the second main pipe is connected to the working port B, the other end of the second main pipe is provided with two second branch pipes, and the two second branch pipes are respectively connected to the other ends of the two hydraulic motors.

According to some embodiments of the invention, a drain port is provided on both of the hydraulic motors.

According to some embodiments of the present invention, the oil compensator includes a first oil compensating pipeline and a second oil compensating pipeline, an input end of the first oil compensating pipeline is connected to the two oil drainage ports, an output end of the first oil compensating pipeline is connected to the first main pipe, an input end of the second oil compensating pipeline is connected to the two oil drainage ports, an output end of the second oil compensating pipeline is connected to the second main pipe, and the first oil compensating pipeline and the second oil compensating pipeline are both provided with a check valve.

According to some embodiments of the invention, the oil compensator comprises a third oil compensating pipeline and a fourth oil compensating pipeline, an input end of the third oil compensating pipeline is connected with an oil tank on the excavator, an output end of the third oil compensating pipeline is connected with the first header pipe, an input end of the fourth oil compensating pipeline is connected with the oil tank on the excavator, an output end of the fourth oil compensating pipeline is connected with the second header pipe, and the third oil compensating pipeline and the fourth oil compensating pipeline are provided with check valves.

According to some embodiments of the invention, a first relief valve is provided between the first and second oil compensating lines.

According to some embodiments of the invention, the drain port communicates with the oil return port T.

According to some embodiments of the invention, a second relief valve is provided on the oil inlet P.

According to some embodiments of the invention, a third relief valve is provided between the first and second manifolds.

According to some embodiments of the invention, a flow divider is arranged between the first main pipe and the two first branch pipes and/or between the second main pipe and the two second branch pipes for equally distributing oil to the two hydraulic motors

According to some embodiments of the invention, the first relief valve, the second relief valve and the third relief valve are relief valves.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a hydraulic schematic of the present invention;

reference numerals:

a hydraulic motor 100, a drain port 101, and a drain line 102; an oil liquid pipeline 200, a three-position four-way valve 201, a first main pipe 202, a second main pipe 203, a first branch pipe 204, a second branch pipe 205, a second safety valve 206, a third safety valve 207 and a flow dividing valve 208; a first oil compensating line 301, a second oil compensating line 302, a check valve 303, a first relief valve 304, a first input pipe 305, and a second input pipe 306.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", and the like, indicate orientations and positional relationships based on the orientations and positional relationships shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

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.

A crushing and screening mixer hopper hydraulic system according to an embodiment of the invention is described below with reference to fig. 1.

The crushing and screening mixing bucket hydraulic system according to the embodiment of the invention is shown in figure 1 and comprises the following components:

a hydraulic motor 100;

an oil line 200 for communicating the hydraulic motor 100 with a hydraulic system on the excavator;

and the oil compensator is connected with the hydraulic motor 100 and is used for providing oil compensation for the hydraulic motor 100.

Hydraulic system on the excavator is provided with oil tank and hydraulic pump, and fluid pipeline 200 feeds through hydraulic motor 100 and oil tank, hydraulic pump, and the hydraulic pump is with hydraulic pump in the oil tank go into hydraulic motor 100 to drive hydraulic motor 100 operation, thereby hydraulic motor 100 drives the work of broken screening mixing bucket, later in the fluid of hydraulic motor 100 output gets back to the oil tank again. Because the hydraulic pump stops the back, can not continue to pump into fluid in fluid pipeline 200, and hydraulic motor 100 can continue to operate a period because inertia, and then can produce the negative pressure in hydraulic motor 100's the input, at this moment, hydraulic motor 100 can follow and draw little part fluid in fluid pipeline 200 through the negative pressure effect, but this part fluid is not enough to fill up the inner chamber of hydraulic motor 100 input, thereby hydraulic motor 100 can produce the suction phenomenon. According to the hydraulic system of the crushing and screening mixing bucket, when the hydraulic pump stops operating, the oil compensator can provide oil compensation for the hydraulic motor 100, namely the oil compensator can input oil into the hydraulic motor 100, so that the hydraulic motor 100 can be prevented from being damaged due to the fact that the hydraulic motor 100 is vacuumed.

It should be noted that the oil pipeline 200 mainly functions to input high-pressure hydraulic oil to the hydraulic motor 100 and to recover the hydraulic oil in the hydraulic motor 100 to an oil tank on the excavator, and the specific structure thereof is various and will not be described herein.

In some embodiments of the present invention, as shown in fig. 1, there are two hydraulic motors 100, and both hydraulic motors 100 are bi-directional hydraulic motors. Furthermore, the output shaft of the hydraulic motor 100 can be switched to forward rotation or reverse rotation according to actual requirements, so that the practicability is better, and the adaptability is wider. It should be noted that, since most of the crushing and screening mixing hoppers are driven by two hydraulic motors 100, two hydraulic motors 100 are provided in the present embodiment, and of course, the number of the hydraulic motors 100 may be one or three according to actual requirements.

In some embodiments of the present invention, as shown in fig. 1, the oil line 200 includes a three-position four-way valve 201, a first main pipe 202 and a second main pipe 203, the three-position four-way valve 201 is provided with an oil inlet P, an oil return port T, a working port a and a working port B, one end of the first main pipe 202 is connected to the working port a, the other end of the first main pipe 202 is provided with two first branch pipes 204, the two first branch pipes 204 are respectively connected to one ends of the two hydraulic motors 100, one end of the second main pipe 203 is connected to the working port B, the other end of the second main pipe 203 is provided with two second branch pipes 205, and the two second branch pipes 205 are respectively connected to the other ends of the two hydraulic motors 100. The oil inlet P can be communicated with a hydraulic pump on the excavator, the oil return port T can be communicated with an oil tank on the excavator, the hydraulic motor 100 can be controlled to rotate forward when hydraulic oil is input from the first main pipe 202, and the hydraulic motor 100 can be controlled to rotate reversely when hydraulic oil is input from the second main pipe 203. And then can switch over three different states through operating three-position four-way valve 201, the first state is that oil inlet P communicates with working port A, oil return T communicates with working port B, the hydraulic motor 100 corotation under this kind of situation, the second state is that oil inlet P communicates with working port B, oil return T communicates with working port A, the hydraulic motor 100 reversal under this kind of situation, the third state is that oil inlet P, oil return T do not all communicate with working port A, working port B, stop to the hydraulic motor 100 oil supply under this kind of situation. In this embodiment, the three-position four-way valve 201 is operated to control the forward rotation, the reverse rotation and the stop operation of the two hydraulic motors 100, so that the operation is simple and convenient, and time and labor are saved.

In some embodiments of the present invention, as shown in fig. 1, oil drain ports 101 are provided on both hydraulic motors 100. After high-pressure fluid got into hydraulic motor 100, because the sealed of parts such as the stator and the rotor of hydraulic motor 100 mainly are sealed through the oil film, so high-pressure oil inevitably can ooze hydraulic motor 100's casing the inside, the oil liquid that oozes out like this will gather in hydraulic motor 100's casing, a small amount of fluid that oozes can play the lubrication action, but if not in time the discharge will gather more, the inside pressure of revealing of casing will be bigger and bigger, not only can destroy sealed, but also the explosion shell can be suppressed even, set up draining port 101, the oil liquid that can in time get rid of the ooze, and then can avoid fluid to destroy sealed or hydraulic motor 100's casing.

According to some embodiments of the present invention, as shown in fig. 1, the oil compensator includes a first oil compensating pipeline 301 and a second oil compensating pipeline 302, an input end of the first oil compensating pipeline 301 is connected to two oil drainage ports 101, an output end of the first oil compensating pipeline 301 is connected to the first main pipe 202, an input end of the second oil compensating pipeline 302 is connected to two oil drainage ports 101, an output end of the second oil compensating pipeline 302 is connected to the second main pipe 203, and a check valve 303 is disposed on each of the first oil compensating pipeline 301 and the second oil compensating pipeline 302. Specifically, the input end of the first oil compensation pipeline 301 is provided with two first input pipes 305, the two first input pipes 305 are respectively connected with the two oil drainage ports 101, the input end of the second oil compensation pipeline 302 is provided with two second input pipes 306, and the two second input pipes 306 are respectively connected with the two oil drainage ports 101. When the hydraulic pump stops to pump into fluid to hydraulic motor 100, hydraulic motor 100 continues the operation because of inertia, and then make the negative pressure phenomenon appear in hydraulic motor 100's the input, at this moment, hydraulic motor 100 can follow first house steward 202 or second house steward 203 internal absorption part fluid through the negative pressure effect, when the fluid of following the internal absorption of first house steward 202 or second house steward 203 is not enough to fill up hydraulic motor 100, can carry out fluid compensation through the fluid of first fluid compensating pipeline 301 or the second fluid compensating pipeline 302 extraction draining mouth 101 department that corresponds, thereby can prevent that hydraulic motor 100 from appearing the phenomenon of inhaling to damage hydraulic motor 100. In this embodiment, through absorbing the fluid of draining port 101 department and compensating this fluid for hydraulic motor 100, not only can regularly clear away the fluid of draining port 101 department, need not additionally set up the oil storage device who is used for the fluid compensation in addition, directly from draining port 101 department extract fluid can, the structure is simpler, it is more convenient to use and maintain.

It will be appreciated that the check valve 303 in this embodiment is capable of allowing oil to pass from the drain opening 101 through the corresponding first or second

oil compensating line

301, 302 into the corresponding first or

second manifold

202, 203, but not allowing oil to pass from the first or

second manifold

202, 203 through the corresponding first or second

oil compensating line

301, 302 into the drain opening 101. Because the check valve 303 has the starting pressure, and the hydraulic pump can provide a higher oil pressure during normal operation, and then can prevent that the fluid of draining port 101 department from entering into first main pipe 202 or second main pipe 203 through first fluid compensating pipeline 301 and second fluid compensating pipeline 302 in the normal course of working, after the hydraulic pump stops the operation, oil pressure disappears, and the negative pressure effect of hydraulic motor 100 can provide a starting pressure for check valve 303, thereby make check valve 303 open, thereby can carry out fluid compensation.

In some embodiments of the present invention, the oil compensator includes a third oil compensating pipeline and a fourth oil compensating pipeline, an input end of the third oil compensating pipeline is connected to an oil tank on the excavator, an output end of the third oil compensating pipeline is connected to the first header pipe 202, an input end of the fourth oil compensating pipeline is connected to the oil tank on the excavator, an output end of the fourth oil compensating pipeline is connected to the second header pipe 203, and the third oil compensating pipeline and the fourth oil compensating pipeline are both provided with check valves 303. When the hydraulic pump stops to pump into fluid to hydraulic motor 100, hydraulic motor 100 continues the operation because of inertia, and then make negative pressure phenomenon appear in hydraulic motor 100's the input, thereby can follow the first total pipe 202 or the interior fluid of second house steward 203 that correspond, because first total pipe 202 passes through third fluid compensating pipeline and oil tank intercommunication, second house steward 203 passes through fourth fluid compensating pipeline and oil tank intercommunication, and then hydraulic motor 100 can carry out fluid compensation through the direct fluid of drawing in the oil tank of corresponding third fluid compensating pipeline or fourth fluid compensating pipeline, thereby can prevent that hydraulic motor 100 from appearing the phenomenon of breathing in and damaging hydraulic motor 100.

It will be appreciated that the check valve 303 of this embodiment is capable of allowing oil to pass from the tank through the respective third or fourth oil compensating line to the respective first or

second manifold

202, 203, but not allowing oil to pass from the first or

second manifold

202, 203 through the respective third or fourth oil compensating line to the tank. The position of the hydraulic motor 100 may be higher than that of the oil tank, and the check valve 303 has a start pressure, so that it is possible to prevent the oil in the oil tank from entering the corresponding first manifold 202 or second manifold 203 through the third oil compensation line and the fourth oil compensation line at ordinary times.

In some embodiments of the present invention, as shown in fig. 1, a first relief valve 304 is disposed between the first oil compensating line 301 and the second oil compensating line 302. The first safety valve 304 is arranged and can be used for relieving oil pressure in the first oil compensation pipeline 301 and the second oil compensation pipeline 302, so that the first oil compensation pipeline 301 and the second oil compensation pipeline 302 can be prevented from being damaged due to overlarge oil pressure in the first oil compensation pipeline 301 and the second oil compensation pipeline 302.

In some embodiments of the present invention, as shown in FIG. 1, the drain port 101 communicates with the oil return port T. The oil drainage port 101 and the oil return port T can be communicated through the oil drainage pipeline 102, so that oil at the oil drainage port 101 can directly return to the oil tank, an oil collecting device does not need to be additionally arranged, the structure is simpler, and the operation is more convenient. In addition, when the hydraulic pump stops operating, and the oil liquid at the oil drain port 101 is not enough to satisfy the extraction of the hydraulic motor 100, the hydraulic motor 100 can directly extract the oil liquid from the oil tank through the oil drain pipeline 102 and the oil return port T, and then the suction phenomenon of the hydraulic motor 100 can be further avoided.

In some embodiments of the present invention, as shown in fig. 1, a second relief valve 206 is provided on the oil inlet P. The second safety valve 206 is arranged at the oil inlet P, and can be used for relieving the oil pressure in the whole oil pipeline 200, so that the phenomenon that the oil pressure in the whole oil pipeline 200 is too large to damage the oil pipeline 200 can be avoided.

In some embodiments of the present invention, as shown in fig. 1, a third relief valve 207 is disposed between the first manifold 202 and the second manifold 203. A third relief valve 207 is provided which can be used to relieve the oil pressure in the first and

second manifolds

202 and 203, thereby avoiding excessive oil pressure in the first and

second manifolds

202 and 203 from damaging the first and

second manifolds

202 and 203.

In some embodiments of the present invention, as shown in fig. 1, a flow dividing valve 208 is provided between the first manifold 202 and the two first branch pipes 204 and/or between the second manifold 203 and the two second branch pipes 205 for evenly distributing oil to the two hydraulic motors 100. The provision of the diverter valve 208 enables the oil in the first manifold 202 or the second manifold 203 to be evenly distributed to the two hydraulic motors 100, thereby avoiding excessive oil being supplied to one of the hydraulic motors 100 and insufficient oil being supplied to the other hydraulic motor 100, and thus avoiding affecting the operation of the hydraulic motors 100 and even damaging the hydraulic motors 100.

In some embodiments of the present invention, as shown in fig. 1, the first relief valve 304, the second relief valve 206, and the third relief valve 207 are relief valves. The overflow valve is a hydraulic pressure control valve and mainly plays roles in constant-pressure overflow, pressure stabilization, system unloading and safety protection. The overflow valve has the advantages of simple structure, low price, wide source and convenient installation, and is a preferred safety valve. It should be noted that the first relief valve 304, the second relief valve 206, and the third relief valve 207 may be other types of valves, such as pressure relief valves.

In the description of the present specification, reference to the description of "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A crushing and screening mixing bucket hydraulic system is characterized by comprising:

the hydraulic control system comprises two hydraulic motors (100), wherein both the two hydraulic motors (100) are bidirectional hydraulic motors, and oil drainage ports (101) are formed in both the two hydraulic motors (100);

the hydraulic control system comprises an oil pipeline (200), wherein the oil pipeline (200) comprises a three-position four-way valve (201), a first main pipe (202) and a second main pipe (203), the three-position four-way valve (201) is provided with an oil inlet P, an oil return port T, a working port A and a working port B, one end of the first main pipe (202) is connected with the working port A, the other end of the first main pipe (202) is provided with two first branch pipes (204), the two first branch pipes (204) are respectively connected with one ends of two hydraulic motors (100), one end of the second main pipe (203) is connected with the working port B, the other end of the second main pipe (203) is provided with two second branch pipes (205), and the two second branch pipes (205) are respectively connected with the other ends of the two hydraulic motors (100);

fluid compensator, fluid compensator includes first fluid compensating line (301) and second fluid compensating line (302), two are connected to the input of first fluid compensating line (301) draining port (101), the output of first fluid compensating line (301) is connected first house steward (202), two are connected to the input of second fluid compensating line (302) draining port (101), the output of second fluid compensating line (302) is connected second house steward (203), first fluid compensating line (301) with all be provided with check valve (303) on second fluid compensating line (302).

2. The crushing and screening mixer hopper hydraulic system according to claim 1, characterized in that a first safety valve (304) is arranged between the first oil compensation line (301) and the second oil compensation line (302).

3. The crushing and screening mixer hopper hydraulic system according to claim 1, characterized in that said drain port (101) communicates with said oil return port T.

4. The crushing and screening mixer hopper hydraulic system according to any one of claims 1 to 3, characterized in that a second safety valve (206) is provided on said oil inlet P.

5. A crushing and screening mixer hopper hydraulic system according to any one of claims 1 to 3, characterised in that a third safety valve (207) is arranged between the first manifold (202) and the second manifold (203).

6. A crushing and screening mixer bucket hydraulic system according to any one of claims 1 to 3, characterized in that a flow dividing valve (208) is arranged between the first main pipe (202) and the two first branch pipes (204) and/or between the second main pipe (203) and the two second branch pipes (205) for equally distributing oil into the two hydraulic motors (100).