CN113757069A

CN113757069A - Material pumping system and pumping equipment

Info

Publication number: CN113757069A
Application number: CN202110925122.1A
Authority: CN
Inventors: 郝鹏永; 赵佩珩; 佟祥伟
Original assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Current assignee: Zoomlion Heavy Industry Science and Technology Co Ltd
Priority date: 2021-08-12
Filing date: 2021-08-12
Publication date: 2021-12-07

Abstract

The invention belongs to the field of engineering machinery and discloses a material pumping system and pumping equipment, wherein the material pumping system (100) comprises: a hopper (1); the pumping main body mechanism comprises a pumping cylinder (2) connected with the hopper (1) and a piston (3) arranged in the pumping cylinder (2); and the electric control mechanism is used for controlling the piston (3) to reciprocate in the pumping cylinder (2), so that the pumping main body mechanism can suck the material in the hopper (1) into the pumping cylinder (2) and then pump the material outwards. Therefore, the system has the advantages of no hydraulic flow and impact in the operation process, no oil leakage risk and high reliability, simplifies the control flow and mode in the mode of directly controlling the piston electrically, is convenient to maintain quickly, greatly improves the energy utilization rate, reduces the noise, realizes zero emission and can avoid environmental pollution compared with the traditional diesel power driving mode.

Description

Material pumping system and pumping equipment

Technical Field

The invention relates to the technical field of engineering machinery, in particular to a material pumping system and pumping equipment.

Background

The pumping equipment is a large-scale engineering machine with wide application, and since its birth, the problems of high oil consumption, low energy utilization rate, poor emission and the like exist all the time, but the main reason is that most of the pumping equipment adopts a diesel engine or an electric motor as a power source and adopts a hydraulic actuating mechanism, if the energy consumption of the equipment is reduced and the emission is reduced, the power matching between a pumping system and the power source needs to be optimized or the pumping system needs to be improved, but the complexity of a control system of the pumping equipment is increased.

In the pumping equipment adopting the diesel engine as a power source, the equipment drives the hydraulic pump to output oil liquid to provide energy through the diesel engine, realizes pumping reversing action through valve control or pump control, and adjusts the pumping efficiency through adjusting the rotating speed of the diesel engine and the discharge capacity of the hydraulic pump. Obviously, the diesel engine is adopted as a power source, so that the whole emission and energy consumption of the equipment are high; in the aspect of control, the power matching characteristic between a pumping system and a diesel engine needs to be considered, and if the matching performance is not good, redundant energy waste is caused; in addition, the high-speed operation of the diesel engine and the pressure impact existing during the reversing of the hydraulic system can cause larger noise; and the hydraulic pressure that the hydraulic pump outputs need to pass through hydraulic pressure pipeline and hydraulic valve piece before reaching the pneumatic cylinder, so there is certain energy loss, if hydraulic oil leaks, still pollute the environment easily.

Disclosure of Invention

Aiming at the defects or shortcomings in the prior art, the invention provides a material pumping system and pumping equipment, which can greatly improve the energy utilization rate, simplify the control flow and mode, reduce noise, realize zero emission and facilitate quick maintenance.

To achieve the above object, a first aspect of the present invention provides a material pumping system, including:

a hopper;

the pumping main body mechanism comprises a pumping cylinder connected with the hopper and a piston arranged in the pumping cylinder; and

and the electric control mechanism is used for controlling the piston to reciprocate in the pumping cylinder, so that the pumping main body mechanism can suck the material in the hopper into the pumping cylinder and then pump the material outwards.

Optionally, the electric control mechanism includes a linear motor, the linear motor includes a stator and a mover capable of moving linearly, and the mover and the piston are fixed to each other.

Optionally, the material pumping system includes a water tank disposed between the electric control mechanism and the pumping main body mechanism, the pumping main body mechanism includes a connecting rod, the connecting rod penetrates through the water tank, and two ends of the connecting rod are respectively connected to the piston and the mover.

Optionally, a sealing ring is padded between the water tank and the electric control mechanism.

Optionally, the stator is sleeved on the pumping cylinder, and the mover is fixedly connected to the piston.

Optionally, the electric control mechanism comprises an electric cylinder, and a linear moving member of the electric cylinder is fixedly connected with the piston.

Optionally, the material pumping system comprises an overall controller configured to:

controlling the electric control mechanism to operate at a maximum output power before an actual pumping efficiency of the material pumping system reaches a preset desired pumping efficiency;

controlling the electric control mechanism to operate at a rated output power after the material pumping system reaches the desired pumping efficiency.

Optionally, the material pumping system comprises a pumping distribution mechanism and two pumping main body mechanisms, the pumping distribution mechanism comprises a pumping distribution valve which can be alternately connected with two pumping cylinders of the two pumping main body mechanisms, and the electric control mechanism is arranged to synchronously control one of the two pumping cylinders to perform a material sucking action when the pumping distribution valve is connected with the other pumping cylinder to control the other pumping cylinder to perform the material pumping action.

Optionally, the material pumping system includes two electric control mechanisms capable of operating independently of each other and respectively controlling the two pumping main mechanisms correspondingly.

In a second aspect, the present invention provides a pumping apparatus comprising a material pumping system as described above.

In the invention, the actuating mechanism of the material pumping system does not comprise any hydraulic part, but adopts the electric control mechanism and the pumping main body mechanism matched with the electric control mechanism as a substitute actuating mechanism, and in the pumping process, the electric control mechanism directly controls the piston of the pumping main body mechanism to reciprocate in the pumping cylinder, so that the material sucking action and the material pumping action of the system are realized. Obviously, this operation process does not have any hydraulic pressure and flows and assault, does not have the oil leak risk, and the reliability is high, adopts under the mode of electronic direct control piston, and control flow and mode can be simplified, and the swift maintenance of being convenient for compares with traditional diesel power drive mode, greatly improves energy utilization, reduces the noise, realizes the zero release, can avoid causing environmental pollution.

Additional features and advantages of the invention will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a material pumping system in accordance with an embodiment of the present invention;

FIG. 2 is a schematic view of another material pumping system in an embodiment of the present invention;

fig. 3 is a top cut-away view of a stator, mover, and piston of the material pumping system of fig. 2.

Description of reference numerals:

100 material pumping system

1 hopper 2 pumping cylinder

3 piston 4 stator

5 mover 6 water tank

7 connecting rod 8 sealing ring

9 pumping distribution valve 10 distribution control electric cylinder

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In embodiments of the invention, where the context requires otherwise, the use of directional terms such as "upper, lower, top and bottom" is generally intended in the orientation shown in the drawings or the positional relationship of the various components in a vertical, vertical or gravitational orientation.

The invention will be described in detail below with reference to exemplary embodiments and with reference to the accompanying drawings.

As shown in fig. 1 to 3, a first exemplary embodiment of the present invention provides a material pumping system 100, which mainly includes a hopper 1, a pumping body mechanism, and an electric control mechanism. Wherein the hopper 1 is used for storing materials to be pumped outwards and can be of different kinds, such as concrete and the like. The pumping main body mechanism is a direct execution mechanism which can suck materials from the hopper 1 and pump the sucked materials outwards, and comprises a pumping cylinder 2 and a piston 3, wherein the pumping cylinder 2 is connected with the hopper 1 and can be communicated with the hopper 1, and the piston 3 is arranged in the pumping cylinder 2 and can reciprocate in the pumping cylinder. For example, referring to fig. 1 and 2, during operation of the material pumping system 100, when the piston 3 moves away from the hopper 1 in the pumping cylinder 2, the pumping body mechanism can suck the material in the hopper 1 into the pumping cylinder 2, and conversely, when the piston 3 moves close to the hopper 1, the material sucked into the pumping cylinder 2 can be pumped outwards, and particularly, the material can be pumped out through other structures such as a cylinder and/or a pipeline communicated with the bottom of the pumping cylinder 2. In addition, the electric control mechanism is also a part of the actuator of the material pumping system 100, and the reciprocating movement of the piston 3 is realized by the direct drive of the electric control mechanism, so the electric control mechanism can be regarded as an indirect actuator of the material pumping system 100.

It can be seen that the power source used by the material pumping system 100 is pure electric power, that is, the material pumping system 100 provides motive power for the actuating mechanism formed by the electric control mechanism and the pumping main body mechanism through the external power supply. This is essentially different from some pumping devices in the prior art that use an electric motor as a power source, and the electric motor is not regarded as a pure electric power source because it involves a process of converting electric energy into mechanical energy when operating, and inevitably generates large noise and causes a certain loss of energy in the form conversion process when operating, but these defects can be overcome or improved when using a pure electric power source. In addition, compared with some conventional diesel power driving methods, the material pumping system 100 of the present exemplary embodiment can greatly improve energy utilization, reduce noise, realize zero emission, and avoid causing environmental pollution.

On the other hand, the actuating mechanism of the material pumping system 100 does not include any hydraulic component, so that no hydraulic flow and impact exist in the operation process, no oil leakage risk exists, the reliability is high, the control flow and mode can be simplified in the mode of adopting the electric direct control piston, and the system can be conveniently and quickly maintained.

In order to meet the requirements of pumping efficiency, pumping frequency, long-time continuous pumping and the like, an energy storage system can be arranged in the material pumping system 100 and is required to have higher power density and energy density. The energy storage system is arranged between the electric control mechanism and an external power supply, the external power supply charges the energy storage system, and the energy storage system provides a stable power source for the electric control mechanism. In addition, in order to meet the adaptability requirement and improve the universality, a power frequency converter can be arranged between the energy storage system and the electric control mechanism, and the power frequency converter can convert the energy of a power supply into an input form required by the electric control mechanism and provide an energy path for the electric control mechanism.

In an alternative or preferred embodiment, the electric control mechanism may comprise a linear motor. As is well known, the linear motor includes a stator 4 and a mover 5, and the mover 5 can be linearly moved by an interaction of electromagnetic forces between the stator 4 and the mover 5. Therefore, as long as the rotor 5 and the piston 3 are fixed to each other, the piston 3 can be synchronously driven to linearly reciprocate in the pumping cylinder 2 by the linear movement of the rotor 5, so that the material sucking action and the material pumping action can be switched simply and freely continuously. Since the linear motor is easily and directly available on the market, the design and manufacturing costs of the material pumping system 100 can be saved to some extent, and the later maintenance or replacement is also very convenient, so that the maintenance cost can also be saved.

The embodiment does not limit the specific fixing manner of the mover 5 and the piston 3, and the mover 5 and the piston may be fixed in direct contact or fixed by means of other connecting members.

For example, in the embodiment shown in fig. 1, the pumping body mechanism may further include a connecting rod 7, two ends of the connecting rod 7 are respectively connected with the piston 3 and the mover 5, and a shaft of the connecting rod is mostly located in the pumping cylinder 2. During operation of the material pumping system 100, material leakage may contaminate the connecting rod 7 due to loose connection of the piston 3 to the inner circumferential wall of the pumping cylinder 2. In order to ensure the cleanness of the connecting rod 7, a water tank 6 can be arranged between the electric control mechanism and the pumping main body mechanism, and the connecting rod 7 penetrates through the water tank 6, so that the rod body of the connecting rod 7 can be cleaned by the water tank when the connecting rod moves linearly. Furthermore, in order to prevent the electric control mechanism from water inlet and ensure the long-time reliable operation, a sealing ring 8 can be arranged between the water tank 6 and the electric control mechanism in a cushioning manner.

In the embodiment shown in fig. 2 and 3, the mover 5 and the piston 3 are fixed in direct contact. Specifically, the stator 4 is sleeved outside the pumping cylinder 2, and the mover 5 is fixedly connected to the piston 3, so that connecting members such as a connecting rod 7 are saved, and the water tank 6 is not required. It can be seen that compared with the material pumping system 100 provided with the connecting rod 7, the system of the present embodiment greatly shortens the overall length of the actuator, simplifies the mechanical structure of the actuator, and thus increases the length of the pumping cylinder 2 and the stroke of the piston 3, thereby reducing the reversing frequency and improving the pumping efficiency.

In an alternative or preferred embodiment, the electric control mechanism may comprise an electric cylinder. As is known, an electric cylinder is a modular product in which a servo motor and a lead screw are integrally designed, and can convert a rotational motion of the servo motor into a linear motion, so that the electric cylinder inevitably includes a linear moving member. Therefore, as long as the linear moving part of the electric cylinder is fixedly connected with the piston 3, the piston 3 can be directly driven to linearly reciprocate by the linear moving part. Similarly, the electric cylinder is also readily available directly from the market, and also saves the design manufacturing cost and maintenance cost of the material pumping system 100 to some extent.

The electric control mechanism of the present exemplary embodiment may employ a constant power limit control strategy.

Specifically, an overall controller is provided in material pumping system 100 and configured to: controlling the electric control mechanism to operate at maximum output power before the actual pumping efficiency of the material pumping system 100 reaches a preset desired pumping efficiency, thereby increasing the pumping efficiency to a desired level at a fastest speed; after the material pumping system 100 reaches the desired pumping efficiency, the electric control mechanism is controlled to operate at the rated output power, so that the load of the electric control mechanism is reduced while the pumping efficiency is maintained at the desired level, and the service life of the electric control mechanism is prevented from being shortened due to long-time continuous overload.

In addition, the general controller may also be configured to collect and output pumping information of material pumping system 100, including pumping gear, system power, pumping frequency, etc. More specifically, the general controller includes a data acquisition unit for acquiring working data of the material pumping system 100, wherein the working data includes, but is not limited to, system power, pumping gear, pumping frequency, pumping times, stator displacement value, pumping volume, and the like. The master controller further comprises a communication unit, which is configured to timestamp the operating condition information of the material pumping system 100 and send the timestamp information to the control center, where the timestamped operating condition information includes, but is not limited to, a system gear with a timestamp, system power, pumping frequency, piston displacement value, pumping volume, and serial number information of the pumping device.

The motor control mechanism can be provided with a control and detection system communicated with the master controller, and the linear motor or the electric cylinder and the like can be controlled according to the actual working condition requirement of pumping, so that the linear motor or the electric cylinder can pump materials outwards in a set mode.

Specifically, the control and detection system is divided into two parts, one of which is a detection part and the other of which is a control part. The detection includes position detection of the mover and the like, and a position signal detected by the position sensor is input as a motor phase change. In addition, the detection also includes the detection of the electrical parameters of the linear motor or the electric cylinder, and the detection of the electrical parameters provides parameters for the closed-loop control of the linear motor or the electric motor and is the basis for the drive protection. The core of the control part is a microprocessor in the linear motor or the electric cylinder, the microprocessor is required to have higher operation speed and precision, a complex control algorithm can be realized, and the real-time control of the linear motor or the electric cylinder can be realized.

The material pumping system 100 of the present exemplary embodiment may further improve pumping efficiency. For example, the number of the pumping main mechanisms can be two, and a pumping distribution mechanism provided with a pumping distribution valve 9 is additionally arranged in the system, and during the operation of the system, the pumping distribution valve 9 can be alternately connected with the two pumping cylinders 2 in the two pumping main mechanisms in a switching connection mode. Under this configuration, the electric control mechanism is arranged to synchronously control one of the two pumping cylinders 2 to perform the action of sucking material while the pumping distribution valve 9 is connected to the other one of the two pumping cylinders to control the other one to perform the action of pumping material. Therefore, when one pumping main body mechanism finishes the action of pumping materials, the other pumping main body mechanism finishes the action of sucking the materials, and at the moment, the pumping distribution valve 9 is switched to be connected with the pumping cylinder 2 of the other pumping main body mechanism, so that the action of pumping the materials can be immediately carried out, the action of pumping the materials is basically carried out uninterruptedly, and the pumping frequency in unit time is improved.

The switching connection action of the pumping distribution valve 9 can be realized by arranging a distribution control electric cylinder 10 in the pumping distribution mechanism. For example, when the pumping distribution valve 9 is formed as a swing cylinder as shown in the figure, the swing cylinder is swung to be connected to the bottom of the pumping cylinder 2 of one of the pumping body mechanisms by the distribution control electric cylinder 10 driving the swing cylinder to swing left and right.

Further, the number of the electric control mechanisms may be set to two, and the two electric control mechanisms can operate independently of each other to control the two pumping main body mechanisms respectively and correspondingly. One benefit of such an arrangement is that the pumping function of material pumping system 100 is maintained even when one of the electrically controlled mechanisms is damaged or fails.

A second exemplary embodiment of the present invention provides a pumping apparatus employing the material pumping system 100 described above. Obviously, the pumping device has all the technical effects brought by the material pumping system 100, and thus, the detailed description is not repeated.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.

It should be noted that, in the foregoing embodiments, various features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in further detail in the embodiments of the present invention.

In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.

Claims

1. A material pumping system, characterized in that the material pumping system (100) comprises:

a hopper (1);

the pumping main body mechanism comprises a pumping cylinder (2) connected with the hopper (1) and a piston (3) arranged in the pumping cylinder (2); and

the electric control mechanism is used for controlling the piston (3) to reciprocate in the pumping cylinder (2), so that the pumping main body mechanism can suck the material in the hopper (1) into the pumping cylinder (2) and then pump the material outwards.

2. The material pumping system according to claim 1, wherein the electrically controlled mechanism comprises a linear motor comprising a stator (4) and a linearly movable mover (5), the mover (5) and the piston (3) being fixedly arranged to each other.

3. The material pumping system according to claim 2, characterized in that the material pumping system (100) comprises a water tank (6) arranged between the electric control mechanism and the pumping body mechanism, the pumping body mechanism comprises a connecting rod (7), the connecting rod (7) is arranged through the water tank (6) and two ends of the connecting rod are respectively connected with the piston (3) and the mover (5).

4. The material pumping system according to claim 3, wherein a sealing ring (8) is padded between the water tank (6) and the electric control mechanism.

5. The material pumping system according to claim 2, wherein the stator (4) is arranged externally around the pumping cylinder (2), and the mover (5) is fixedly connected to the piston (3).

6. The material pumping system according to claim 1, wherein the electrically operated control mechanism comprises an electrically operated cylinder, the linearly movable member of which is fixedly connected to the piston (3).

7. The material pumping system of claim 1, wherein the material pumping system (100) comprises an overall controller configured to:

controlling the electric control mechanism to operate at a maximum output power before an actual pumping efficiency of the material pumping system (100) reaches a preset desired pumping efficiency;

controlling the electric control mechanism to operate at a rated output power after the material pumping system (100) reaches the desired pumping efficiency.

8. The material pumping system according to claim 1, characterized in that the material pumping system (100) comprises a pumping distribution mechanism and two pumping body mechanisms, the pumping distribution mechanism comprises a pumping distribution valve (9) alternately connectable with two pumping cylinders (2) of the two pumping body mechanisms, the electric control mechanism is arranged to synchronously control one of the two pumping cylinders (2) to perform a suction material action when the pumping distribution valve (9) is connected with the other to control the other to perform a pumping material action.

9. The material pumping system of claim 8, wherein the material pumping system (100) comprises two of the electrically operated control mechanisms operable independently of each other and respectively controlling the two pumping body mechanisms.

10. A pumping arrangement, characterized in that it comprises a material pumping system (100) according to any one of claims 1 to 9.