WO2016008295A1

WO2016008295A1 - Piston type industrial conveying pump

Info

Publication number: WO2016008295A1
Application number: PCT/CN2015/071421
Authority: WO
Inventors: 张泽武; 欧阳绪荣; 何干君; 李余辉; 刘云林
Original assignee: 飞翼股份有限公司
Priority date: 2014-07-17
Filing date: 2015-01-23
Publication date: 2016-01-21
Also published as: CN104776003A; CN104776003B

Abstract

A piston type industrial pump comprises a power device (1), a pumping device (2) and a stirring device (3). A connecting pipeline is arranged between the power device (1) and the pumping device (2); the pumping device (2) is fixedly connected with the stirring device (3); the power device (1) consists of at least two power units connected in parallel; the power units comprises hydraulic oil tanks (101), motor oil pump sets (102), and a power unit base (103); and a communicating oil pipe (104) is arranged between the hydraulic oil tanks (101) of the power units. There are at least two groups of motor oil pump sets (102) provided in each power unit. Two or more power units are connected in parallel for providing superimposed power, so that the flow of a hydraulic system can meet a large-volume conveying requirement; in the meantime, all the power units are independent of each other and can work together in parallel or work independently; when one of the power units is fails, only the faulty unit is stopped for maintenance, and the other power units continuously provide power output and are spare to each other.

Description

Piston industrial pump

The present application claims priority to Chinese Patent Application No. 201410341009.9, entitled "Piston-type Industrial Transfer Pump", filed on July 17, 2014, the entire contents of which is incorporated herein by reference. .

Technical field

The present invention relates to a material handling device, and more particularly to a piston industrial delivery pump.

Background technique

In the current industrial production operations, the transfer pump is more and more widely used in the transportation of viscous materials, but the conventional delivery pump has a relatively low delivery volume per unit time, generally within 200 cubic meters per hour, which cannot be satisfied. Heavy-duty transportation requirements in mining, mineral processing, metallurgy, sewage treatment, power plants, petrochemicals, solid waste treatment, tunnel construction, land reclamation and other fields. At present, some specially designed piston industrial pumps can meet the demand of large-scale transportation. However, these large-pumped piston industrial pumps generally use large rows in order to meet the requirements of the pumping system for large flow. The closed type oil pump constitutes a closed hydraulic system. This type of system has high cost, complicated system, high maintenance cost, and a system composed of multiple closed oil pumps. All closed oil pumps must work at the same time, otherwise the closed type does not work. Instead, the oil pump will become a load (equivalent to the motor) brake motor or other power source. In other words, the closed oil pumps of the above systems cannot be spared each other. Once one of the oil pumps fails, the entire system must be shut down for maintenance, which has a considerable impact on the mass transfer of materials, which will cause a large amount of transported materials to stagnate in the transfer pipeline. Because it is not pumped in time and solidified in the conveying pipeline, it takes a lot of manpower, material resources and time to clean the conveying pipeline.

Therefore, how to provide an industrial pump with simple structure, strong continuous working ability and capable of large-discharge transportation of materials has become an urgent problem to be solved by those skilled in the art.

Summary of the invention

The technical problem to be solved by the invention is to provide a piston type industrial conveying pump, which can realize the generous mass transportation of materials through its structural design, and has a simple structure and strong continuity of material transmission, even if part If the oil pump fails, it will not cause the material conveying pipe to block. Plug.

A piston industrial pump includes a power device, a pumping device and a stirring device, and a connecting pipe is arranged between the power device and the pumping device, and the pumping device and the stirring device are fixedly connected, and the power device is At least two power units are formed in parallel, the power unit includes a hydraulic oil tank, a motor oil pump set and a power unit base, and a communication oil pipe is disposed between the power unit hydraulic oil tanks.

Preferably, the motor oil pump set comprises a three-phase asynchronous motor, a variable displacement piston pump, a constant pressure variable displacement piston pump, a gear pump, and the variable displacement piston pump, the constant pressure variable displacement piston pump and the gear pump are sequentially connected in series to form an oil pump set. The input shaft of the oil pump set and the output shaft of the three-phase asynchronous motor are connected by a flexible coupling to form a motor oil pump set.

Preferably, the motor oil pump set provided on each power unit is at least two groups.

Preferably, the hydraulic oil tank is further provided with an oil return filter, a return oil accumulator and a return oil collecting block.

Preferably, the pumping device comprises a left and right pumping main oil cylinder, a water tank, a left and right conveying cylinder, and a hopper, wherein the left and right pumping main oil cylinder comprises a rod chamber and a rodless chamber, and the water tank is respectively provided with a through hole. The left and right pumping main oil cylinders are connected to one end of the water tank and have a rod cavity concentric with the water tank through hole, the other end of the water tank is connected with one end of the left and right conveying cylinders, and the water tank through hole is concentric with the left and right conveying cylinder cylinder cavities, The other ends of the left and right transport cylinders are connected to the two holes provided at the rear end of the hopper and are coaxial. The left and right transport cylinders are respectively provided with left and right transport cylinder pistons, and the left and right transport cylinder pistons are respectively arranged in the left and right pumping main cylinders. The piston rod is connected, and a communication passage is arranged between the rod chambers of the left and right pumping main cylinders, and the rodless chamber end of the left and right pumping main cylinder is also connected with a large-diameter spool-type reversing valve and a commutation high pressure An accumulator, wherein the rodless chambers of the left and right pumping main cylinders are respectively connected to the A port and the B port of the large-diameter spool valve type reversing valve, and the large-diameter spool valve type reversing valve comprises a main reversing valve and a pilot Directional valve.

Preferably, the P port on the large-diameter spool-type directional control valve is in communication with the power unit oil passage, and the T-port of the large-diameter spool-type directional control valve is in communication with the oil return manifold.

Preferably, the hopper is further provided with an S tube, the outlet end of the S tube is coaxially connected with the outlet end of the hopper and rotatable about an axis, and the inlet end of the S tube is at a certain angle with its outlet end as a fulcrum The S-tube swinging device includes a left and right swing valve cylinder, and one end of the left and right swing valve cylinder is installed in a ball seat provided on the hopper and rotatable around the ball seat, and the other end of the left and right swing valve cylinder Mounted on the swing arm seat, the pumping device is further provided with a distribution reversing valve, the rodless cavity of the left and right swing valve cylinder is connected with the distribution reversing valve, and the P port of the distribution reversing valve is connected with a constant pressure The oil circuit and the distribution accumulator, and the T port on the distribution reversing valve is in communication with the hydraulic oil tank.

Preferably, a stroke proximity switch or a displacement sensor is further connected to the left and right pumping main oil cylinders and the left and right swing valve cylinders.

Preferably, the stirring device comprises left and right agitating motors and left and right agitating blades, wherein the left and right agitating motors respectively provide rotational power for the left and right agitating blades, and the left and right agitating motors are respectively fixedly mounted on the left and right end walls of the pumping device hopper.

Preferably, the piston industrial transfer pump further comprises a control system comprising a hydraulic control system or/and an electrical control system.

The invention has the beneficial effects that the invention adopts two or more power units to provide power in parallel, and by superimposing two or more power units, the hydraulic system flow can reach the required flow rate, and meets the demand for large-scale transportation, and each The power units are independent of each other and can work together in parallel or separately. When one of the power units fails, the unit can only be stopped for maintenance. The other power units continue to provide power output and reserve each other to ensure the filling of industrial pumps. The reliability and continuity of work also enable modularization and standardization of the power unit. The invention adopts a connecting oil pipe to connect the hydraulic oil tanks of the power units, so that the hydraulic oil in the hydraulic oil tank of each power unit can flow freely, and the liquid pressure of each hydraulic oil tank is balanced by the atmospheric pressure to prevent the hydraulic oil from returning to one back. The hydraulic unit of the power unit of the lower power unit causes the hydraulic oil in one of the power unit hydraulic oil tanks to overflow, and the hydraulic oil level of the other power unit is too low, causing the oil pump to be sucked up or even the oil pump to be damaged, so that the system cannot work normally. The movement reversal of the pumping main cylinder of the device is controlled by a large-diameter spool-type reversing valve, which has low requirements on system cleanliness and temperature, and the control is simpler.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

Figure 1 is a schematic view showing the overall structure of a piston type industrial conveying pump of the present invention;

2 is a schematic structural view of a power device of a piston industrial pump according to the present invention;

3 is a schematic structural view of a pumping device and a stirring device for a piston industrial pump according to the present invention;

Figure 4 is a partial cross-sectional view of the piston type industrial transfer pump A-A of the present invention.

detailed description

The technical solutions in the embodiments of the present application are clearly and completely described in the following, in which the technical solutions in the embodiments of the present application are clearly and completely described. The embodiments are only a part of the embodiments of the present application, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without departing from the inventive scope shall fall within the scope of the application.

In the present invention, the description of the orientation word, the front end refers to the 9 o'clock direction in the drawing, the rear end refers to the 3 o'clock direction in the drawing, the left side is the 6 o'clock direction, and the right side is the 12 o'clock direction.

Referring to Figure 1, there is provided a specific embodiment of a piston industrial transfer pump comprising a power unit 1, a pumping unit 2 and a stirring unit 3, wherein a connection is provided between the power unit 1 and the pumping unit 2 The pipe, the pumping device 2 and the agitating device 3 are fixedly connected. In the present embodiment, the power device 1 is composed of two power units connected in parallel, wherein each power unit comprises two sets of motor oil pump sets.

The above embodiment uses two power units to provide power in parallel. By combining the two power units, the hydraulic system flow can reach the required flow rate. In this embodiment, a single power unit can provide a maximum flow rate of 1730 L/min through two The power unit is superimposed and combined, and the hydraulic system flow can reach 3460L/min, which meets the requirements of generous transportation.

The above two power units are independent of each other, can work together in parallel, or can work alone. When one of the power units fails, only the unit can be stopped for maintenance, and other power units continue to provide power output, mutual backup, guarantee Fill the reliability and continuity of the work of the industrial pump.

1 and 2, each set of power units includes a hydraulic oil tank 101, a motor oil pump set 102, and a power unit base 103, and a communication oil pipe 104 is disposed between the power unit hydraulic oil tanks 101.

The communication oil pipe 104 connects the hydraulic oil tanks 101 of the respective power units, and the hydraulic oil in the hydraulic power tanks 101 of the two power units can flow freely, and the atmospheric pressure balances the liquid levels of the two hydraulic oil tanks 101 to prevent the hydraulic oil from returning all the way. One of the power unit hydraulic tanks with low back pressure 101, thereby causing the power unit hydraulic oil to overflow the hydraulic oil tank 101, and the other hydraulic oil tank liquid level is too low, causing the oil pump to be sucked up or even the oil pump is damaged to make the system unable to work normally.

The motor oil pump set 102 of the power unit includes a three-phase asynchronous motor 105, a variable displacement piston pump 106, a constant pressure variable displacement piston pump 107, a gear pump 108, wherein the variable displacement piston pump 106, the constant pressure variable displacement piston pump 107, and the gear pump 108 The oil pump group is sequentially connected in series, and then the oil pump set input shaft and the output shaft of the three-phase asynchronous motor 105 are connected through the elastic coupling 109 to form a motor oil pump group.

In order to achieve oil return and filtration of the hydraulic oil tank, an oil return filter 110, a return oil accumulator 111 and a return oil collecting block 112 are further disposed outside the hydraulic oil tank 101.

3 and FIG. 4, the pumping device 2 includes a left pumping master cylinder 201, a right pumping master cylinder 202, a water tank 203, a left transport cylinder 204, a right transport cylinder 205, and a hopper 206.

In this embodiment, the left pumping main cylinder 201 and the right pumping main cylinder 205 include a rod cavity at the front end and a rodless cavity at the rear end (the cavity end is provided with a piston rod), and the water tank 203 is respectively provided with a through hole. a hole which is connected to the front end of the left pumping main cylinder 201 and the right pumping main cylinder 202 and is concentric with the cylinder chamber thereof, so that the piston rod can pass through the through hole and the piston provided on the other side, and the left conveying cylinder The front end of the right and right transfer cylinders 205 are connected to the two holes provided at the rear end of the hopper 206, and are coaxial. The rear ends of the left and

right transfer cylinders

204 and 205 are coaxially connected to the left and right through holes at the front end of the water tank 203. The left transport cylinder 204 and the right transport cylinder 205 are respectively provided with a left transport cylinder piston 207 and a right transport cylinder piston 208, and the left transport cylinder piston 207 and the right transport cylinder piston 208 are respectively connected to the above-mentioned piston rod passing through the through hole of the water tank 203. Specifically, the left delivery cylinder piston 207 is connected to the piston rod in the left pumping main cylinder 201, the right delivery cylinder piston 208 is connected to the piston rod of the right pumping main cylinder 202, and the left pumping main cylinder 201 and the right pumping main are connected. The rod chamber of the cylinder 202 is communicated through the communication passage, and the rodless chambers of the left pumping main cylinder 201 and the right pumping main cylinder 202 are respectively associated with the A, B of the large-diameter spool-type reversing valve 209 provided on the pumping device 2. The port and the commutating high pressure accumulator 210 are connected.

The pumping cylinder movement reversal of the present invention is controlled by a large-diameter spool-type reversing valve 209. The large-diameter spool-type reversing valve 209 is composed of a main reversing valve and a pilot reversing valve, and is controlled by a signal-controlled pilot reversing valve. Thus, the main reversing valve is reversed. Since the main valve is a spool type structure, compared with a plurality of large-diameter cartridge valves, the system has lower cleanliness and temperature requirements, and the control is simpler and more reliable.

The cooling water in the water tank 203 can absorb the heat generated by the left and right delivery cylinders and the left and right pumping piston rods of the main cylinder due to friction, reduce the temperature of the device, and improve the service life of the device.

In the present embodiment, the P port of the large-diameter spool type directional control valve 209 communicates with the oil passage of the power unit, and the T port of the large-diameter spool type directional control valve 209 communicates with the oil return manifold 112.

An S tube 211 is further disposed in the hopper 206 of the present solution. The outlet end of the front end of the S tube 211 is coaxially connected with the outlet end of the front end of the hopper 206 and rotatable around the center. The inlet end of the rear end of the S tube 211 is supported by the front end outlet. The swinging device providing the S-tube swing includes a left swing valve cylinder 212 and a right swing valve cylinder 213, and one ends of the left swing valve cylinder 212 and the right swing valve cylinder 213 are installed in the ball socket provided on the hopper 206 and Rotating around the ball seat, the other ends of the left swing valve cylinder 212 and the right swing valve cylinder 213 are mounted on a swing arm seat disposed outside the hopper 206, and the left swing valve cylinder 212 and the right swing valve cylinder 213 are respectively coupled to the pumping device. The A and B ports of the distribution reversing valve 214 are connected to each other, and the P port of the distribution reversing valve 214 is connected with a constant pressure oil passage and a distribution accumulator 215, and the accumulator 215 and the constant pressure variable plunger of the power unit 1 are distributed. The pump 107 supplies oil to the left and right swing valve cylinders, and the T port of the distribution reversing valve 214 communicates with the hydraulic oil tank.

A stroke proximity switch or displacement sensor 216 is also connected to the left and right pumping main cylinders and the left and right swing valve cylinders. By using the stroke proximity switch or the displacement sensor 216 to sense the left and right pumping main oil cylinders and the left and right swing valve cylinders, an electric signal is sent to mutually control the movement of the left and right pumping main oil cylinders and the left and right swing valve cylinders to realize automatic pumping; at the same time, the stroke signal It can also control the displacement of the oil pump. Through the displacement control of the oil pump, the reversing buffer of the left and right pumping main cylinder can be realized, the commutation impact can be prevented, the loss of hydraulic components and power loss can be reduced, the system can be operated stably, and safety and environmental protection can be achieved. The purpose of energy saving.

In the present embodiment, the stirring device 3 includes a left agitating motor 301, a right agitating motor 302, a left agitating blade 303, and a right agitating blade 304. The left agitating motor 301 rotates the left agitating blade 303 to rotate the material on the inner side of the hopper 206, and the right agitating motor 302 drives the right agitating blade 304 to rotate the material on the other side of the hopper 206 for stirring. The stirring device 3 is used for stirring. The material to be pumped in the hopper 206 maintains a certain activity of the material to prevent the material from clotting, and then controls the coordinated action between the components through the control system and the pumping system 2 described below to realize automatic pumping.

In this embodiment, the piston industrial transfer pump further includes a control system including a hydraulic control system and an electrical control system.

In the present invention, the hydraulic components are connected by pipes according to the hydraulic principle, and the three-phase asynchronous motors are connected to the electrical control system through cables. The reversing control of the large-diameter spool-type reversing valve 209 and the distribution reversing valve 214 can be controlled by a PLC program controller in the electric control system, and the PLC program controller collects and senses the pumping of the main cylinder and the distribution cylinder stroke. Proximity switch or displacement sensor The signal is controlled by a certain logic program for each of the main valve and the first conductive solenoid valve of the distribution valve, thereby realizing the function of repeated pumping. The control of the large-diameter spool-type reversing valve 209 and the distribution reversing valve 214 can be controlled by the hydraulic signal of the hydraulic control system or the combination of hydraulic and electric control, in addition to the electric signal control. In the same way, control of other parts of the device can be realized.

The specific implementation process of the present invention is: firstly, the hydraulic oil with a certain pressure is formed by the three-phase asynchronous motor driving device of the power device, and then the pumping main oil cylinder is driven to drive the pistons in the two conveying cylinders to alternately reciprocate, so that the materials continuously One of the transfer cylinders is sucked from the hopper, and the piston in the other transfer cylinder presses the material into the S pipe and transports it to the construction site through the transfer pipe.

The principles and embodiments of the present invention have been described herein with reference to specific examples, and the description of the above embodiments is only to assist in understanding the method of the present invention and its core idea. It should be noted that those skilled in the art can make various modifications and changes to the present invention without departing from the spirit and scope of the invention.

Claims

A piston type industrial pump includes a power device, a pumping device and a stirring device, and a connecting pipe is arranged between the power device and the pumping device, and the pumping device and the stirring device are fixedly connected, wherein The power unit is composed of at least two power units connected in parallel, and the power unit includes a hydraulic oil tank, a motor oil pump set and a power unit base, and a communication oil pipe is disposed between the power unit hydraulic oil tanks.
The piston type industrial pump according to claim 1, wherein the motor oil pump set comprises a three-phase asynchronous motor, a variable displacement piston pump, a constant pressure variable displacement piston pump, a gear pump, the variable displacement piston pump, The constant pressure variable piston pump and the gear pump are sequentially connected in series to form an oil pump set, and the input shaft of the oil pump set and the output shaft of the three-phase asynchronous motor are connected by a flexible coupling to form a motor oil pump set.
The piston type industrial transfer pump according to claim 1 or 2, wherein the motor oil pump set provided on each of the power units is at least two groups.
The piston type industrial transfer pump according to claim 1, wherein an oil return filter, a return oil accumulator, and a return oil confluence block are further disposed outside the hydraulic oil tank.
The piston type industrial transfer pump according to claim 4, wherein the pumping device comprises a left and right pumping main oil cylinder, a water tank, a left and right conveying cylinder, a hopper, and the left and right pumping main oil cylinder includes a rod cavity and no a rod cavity, a left hole is respectively disposed on the left and right sides of the water tank, the left and right pumping main oil cylinder is connected to one end of the water tank, and the rod cavity is coaxial with the water tank through hole, and the other end of the water tank is connected to one end of the left and right conveying cylinders The water tank through hole is coaxial with the left and right delivery cylinder cylinders, and the other end of the left and right delivery cylinders is connected to the two holes provided at the rear end of the hopper and is coaxial, and the left and right delivery cylinders are respectively provided with left and right delivery cylinder pistons. The right and left delivery cylinder pistons are respectively connected with the piston rods disposed in the left and right pumping main oil cylinders, and the connecting rod passages are arranged between the rod chambers of the left and right pumping main oil cylinders, and the rodless chamber ends of the left and right pumping main oil cylinders are further A large-diameter spool-type reversing valve and a reversing high-pressure accumulator are connected, and the rodless chambers of the left and right pumping main cylinders are respectively connected to the A and B ports of the large-diameter spool-type reversing valve, the Chase Diaphragm type directional control valve includes Valve and pilot valve.
The piston type industrial transfer pump according to claim 5, wherein the P port on the large-diameter spool type directional control valve is in communication with the power unit oil passage, and the large-diameter spool-type directional control valve The T port is connected to the return oil manifold.
The piston type industrial pump according to claim 5, wherein the hopper is further provided with an S tube, and the outlet end of the S tube is coaxially connected with the outlet end of the hopper and rotatable about an axis, The S tube inlet end swings at a certain angle with its outlet end as a fulcrum, and the S tube swinging device includes a left and right swing valve cylinder, and one end of the left and right swing valve cylinder is installed in a ball head seat provided on the hopper and can be wound around the ball head The other end of the left and right swing valve cylinder is mounted on the swing arm seat, and the pumping device is further provided with a distribution reversing valve, and the rodless cavity of the left and right swing valve cylinder is connected with the distribution reversing valve, The P port of the distribution reversing valve is also connected with a constant pressure oil passage and a distribution accumulator, and the T port on the distribution reversing valve is in communication with the hydraulic oil tank.
The piston type industrial transfer pump according to claim 5, wherein a stroke proximity switch or a displacement sensor is further connected to the left and right pumping main oil cylinders and the left and right swing valve cylinders.
The piston type industrial pump according to claim 1, wherein the agitating device comprises left and right agitating motors, left and right agitating blades, and the left and right agitating motors respectively provide rotational power for the left and right agitating blades, and the left and right agitating motors respectively Fixedly installed on the left and right end walls of the pumping unit hopper.
A piston industrial transfer pump according to claim 1 or 5 or 7, wherein said generous piston industrial transfer pump further comprises a control system comprising a hydraulic control system or/and an electrical control system.