WO2015106718A1

WO2015106718A1 - Pumping mechanism, pumping control method, and concrete pumping device

Info

Publication number: WO2015106718A1
Application number: PCT/CN2015/070990
Authority: WO
Inventors: 柳桂锋; 马生彪; 周昱
Original assignee: 三一汽车制造有限公司
Priority date: 2014-01-20
Filing date: 2015-01-19
Publication date: 2015-07-23
Also published as: CN103821688A; CN103821688B

Abstract

The present invention provides a pumping mechanism and a control method therefor. The pumping mechanism comprises a first conveying cylinder, a second conveying cylinder, a distribution valve, and a spool swingably disposed in the distribution valve. The distribution valve is in communication with one end of the first conveying cylinder and one end of the second conveying cylinder. The spool is in communication with a feed inlet of the distribution valve. The spool comprises a first station, a second station, and a third station. In the first station, the first conveying cylinder is in communication with the feed inlet by means of the spool, and the second conveying cylinder is in communication with a discharge outlet of the distribution valve. In the second station, the first conveying cylinder and the second conveying cylinder are both in communication with the discharge outlet. In the third station, the first conveying cylinder is in communication with the discharge outlet of the distribution valve, and the second conveying cylinder is in communication with the feed inlet by means of the spool. By using the pumping mechanism of the structure, the pumping efficiency can be effectively improved, and the pumping continuity can be better. In addition, the present invention also provides a concrete pumping device.

Description

Pumping mechanism, pumping control method and concrete pumping device

This application claims priority to Chinese Patent Application No. 201410024684.9, entitled "Pumping Mechanism, Pumping Control Method, and Concrete Pumping Equipment", filed on January 20, 2014, all of which are entitled The content is incorporated herein by reference.

Technical field

The invention relates to the field of concrete pumping, in particular to a pumping mechanism, a control method and a concrete pumping device.

Background technique

In recent years, with the sustained and rapid development of China's economy, the demand for construction machinery is also growing. At present, China has become the world's largest producer and seller of construction machinery, and the products produced in China, such as concrete pump trucks. Sending equipment, with its excellent performance, has long been famous at home and abroad.

For concrete pumping equipment, whether it is concrete pump truck or towed concrete pump, there is a common problem that is the continuity of pumping. In the process of conveying materials, the valve reversing will cause a flow interruption phenomenon, resulting in The discharge of the material is large and small, and the pumping continuity is poor.

A concrete distribution valve and a concrete pumping mechanism are disclosed in Chinese Patent Application No. 200810087719.8, wherein the distribution valve comprises a valve body and a valve core located in the valve body, and the valve body is provided with a discharge port and a first suction material. The port and the second suction port have a side opening and a feeding port communicating with the concrete pump hopper, the valve core can be rotated by a certain angle with respect to the valve body, and the side opening is opposite to the valve body rotating to the left limit position with respect to the valve body The first suction port on the valve body communicates, and when the valve core rotates to the right limit position with respect to the valve body, the side opening communicates with the second suction port on the valve body, and the first suction is provided between the valve core and the valve body. The passage of the material port and the second suction port and the discharge port.

The distribution valve of the above structure is more suitable for pumping coarse aggregate, has good suction performance, is easy to clean, can withstand large loads, and can complete high pressure pumping of concrete, but the problem of continuity of pumping is basically no help.

In summary, how to provide a pumping mechanism with high pumping efficiency and good pumping continuity and The control method thereof and the concrete pumping device including the pumping mechanism have become technical problems that need to be solved by those skilled in the art. .

Summary of the invention

In view of this, one of the problems to be solved by the present invention is how to provide a pumping mechanism with high pumping efficiency and good pumping continuity.

The second problem to be solved by the present invention is how to provide a pumping control method for controlling the above pumping mechanism.

The third problem to be solved by the present invention is how to provide a concrete pumping apparatus including the above pumping mechanism.

In order to solve the above problems, the present invention provides a pumping mechanism including a first delivery cylinder, a second delivery cylinder, a distribution valve, and a valve core swingingly disposed in the distribution valve, the distribution valve and the a first delivery cylinder is in communication with one end of the second delivery cylinder, and the valve core is in communication with a feed port of the distribution valve, the spool includes a first station, a second station, and a third station, a first delivery cylinder communicating with the feed port through a spool, the second delivery cylinder being in communication with a discharge port of the distribution valve; and at a second station, the first delivery The cylinder and the second delivery cylinder are both in communication with the discharge port; in the third station, the first delivery cylinder is in communication with the discharge port of the distribution valve, and the second delivery cylinder is passed through the spool The feed port is connected.

As an improvement of the pumping mechanism of the present invention, the dispensing valve is provided with a partition, and in the second station, the partition connects the inlet to the first conveying cylinder, The second delivery cylinder and the discharge port are disconnected.

As an improvement of the pumping mechanism of the present invention, the dispensing valve is provided with a sealing device, and at the first station and/or the second station and/or the third station, the spool and the valve The sealing device is in contact.

As an improvement of one aspect of the pumping mechanism of the present invention, the sealing device is a gasket.

As an improvement of one aspect of the pumping mechanism of the present invention, the pumping mechanism further includes a hopper, the feed port of the dispensing valve being in communication with the hopper.

As an improvement of one aspect of the pumping mechanism of the present invention, the bottom of the dispensing valve is provided with a discharge opening.

The pumping mechanism of the above structure comprises a first conveying cylinder, a second conveying cylinder, a distribution valve and a valve core which is arranged to be arranged in the distribution valve, and the distribution valve is connected with one end of the first conveying cylinder and the second conveying cylinder, the valve core and The feed port of the distribution valve is connected, and the spool includes a first station, a second station and a third station. Since the pressure required for the pumping mechanism to suck the material is much smaller than the pressure required to push the material, the pumping mechanism can be controlled to take a shorter time than the pushing time under a certain pumping pressure. The pumping mechanism, in the pumping process, when the spool is in the first position, the first delivery cylinder draws the material, and the second delivery cylinder pushes the material (ie, pumps), after the first delivery cylinder completes the suction, the first The second conveying cylinder is still in the pushing state, and the spool is adjusted to the second station for a predetermined time before the second conveying cylinder completes the pushing, and the first conveying cylinder and the second conveying cylinder are both discharged from the distribution valve. The mouth is connected, the first conveying cylinder is controlled to push the material, the second conveying cylinder continues to push the material, and after the second conveying cylinder finishes pushing the material, the valve core is adjusted to the third working position. At this time, the first conveying cylinder continues to push the material, The second conveying cylinder sucks the material, and before the first conveying cylinder completes the pushing, the second conveying cylinder completes the suction, and then switches the spool to the second station according to the predetermined time before the first conveying cylinder completes the pushing, according to The order of the first station, the second station, the third station, the second station, and the first station, in turn Ring, continuous pumping process. In the pumping mechanism of the present invention, since the second station is added, the pushing of the material in one of the conveying cylinders has not yet ended, and the other conveying cylinder can start pushing the material, and during the switching process of the valve core, the pushing process is not interrupted. Therefore, the pumping efficiency can be effectively improved and the pumping continuity is better.

In order to solve the above problem, the present invention provides a pumping control method for controlling the pumping mechanism, the spool is switched from a first station to a third station and from the third station to At the first station, they all passed the second station.

As an improvement of one aspect of the pumping control method of the present invention, in the first station, the first delivery cylinder sucks, the second delivery cylinder pushes the material, in the second station, the first At least one of the delivery cylinder and the second delivery cylinder pushes the material, and in the third station, the first delivery cylinder pushes the material, and the second delivery cylinder sucks.

As an improvement of the pumping control method of the present invention, the suction time of the first conveying cylinder and the second conveying cylinder is controlled to be smaller than the pushing time of the first conveying cylinder and the second conveying cylinder. Before the first delivery cylinder or the second delivery cylinder is pushed, the spool is controlled to switch to the second station.

According to the pumping control method of the present invention, since the pumping mechanism described above is employed, the second station is added during the commutation of the first conveying cylinder and the second conveying cylinder, and the pushing of the material in one conveying cylinder is not yet finished. The other transfer cylinder can start to push the material, and during the valve core switching process, the pushing process is not interrupted. Therefore, the pumping continuity is better and the efficiency is effectively improved.

In order to solve the above problem three, the present invention proposes a concrete pumping apparatus including a pumping mechanism which is a pumping mechanism as described above.

The concrete pumping device including the above pumping mechanism has the advantages of high work efficiency and good pumping continuity.

DRAWINGS

The accompanying drawings, which are incorporated in the claims

1 is a schematic structural view of a pumping mechanism of the present invention;

2 is a schematic view of a first station of a pumping mechanism of the present invention;

3 is a schematic view of a second station of a pumping mechanism of the present invention;

4 is a schematic view of a third station of a pumping mechanism of the present invention;

Figure 5 is a schematic view showing the movement of the piston of the first delivery cylinder of the pumping mechanism of the present invention;

Figure 6 is a schematic view showing the movement of the piston of the second delivery cylinder of the pumping mechanism of the present invention.

The correspondence between the reference numerals in Figures 1 to 4 is:

1 first delivery cylinder 2 second delivery cylinder 3 spool

4 discharge port 5 gasket 6 isolation

7 hopper 8 distribution valve

detailed description

It should be noted that the embodiments in the present invention and the features in the embodiments may be combined with each other without conflict. The invention will be described in detail below with reference to the drawings in conjunction with the embodiments.

The pumping mechanism shown in FIGS. 1 to 4 includes a first transfer cylinder 1, a second transfer cylinder 2, a distribution valve 8, and a valve body 3 swingingly disposed in the distribution valve 8, a distribution valve 8 and a first delivery cylinder. 1 is connected to one end of the second delivery cylinder 2, and the valve core 3 is in communication with the feed port of the distribution valve 8, the valve core 3 includes a first station, a second station and a third station, in the first station, The first transfer cylinder 1 communicates with the feed port of the distribution valve 8 through the spool 3, and the second transfer cylinder 2 communicates with the discharge port 4 of the distribution valve 8; When the core 3 is in the second station, the first delivery cylinder 1 and the second delivery cylinder 2 are both in communication with the discharge port 4; in the third station, the discharge of the first delivery cylinder 1 and the distribution valve 8 The port 4 is in communication, and the second delivery cylinder 2 is in communication with the feed port of the distribution valve 8 through the spool 3. Since the pressure required for the pumping mechanism to suck the material is much smaller than the pressure required to push the material, the pumping mechanism can be controlled to take a shorter time than the pushing time under a certain pumping pressure. The pumping mechanism, during the pumping process, when the spool 3 is in the first position (as shown in FIG. 2), the first delivery cylinder 1 draws the material, and the second delivery cylinder 2 pushes the material (ie, pumps), After the first delivery cylinder 1 completes the suction, the second delivery cylinder 2 is still in the push state, and the spool 3 is adjusted to the second station for a predetermined time before the second delivery cylinder 2 completes the pushing, at this time, the first Both the delivery cylinder 1 and the second delivery cylinder 2 are in communication with the discharge port 4 of the distribution valve 8, and the first delivery cylinder 1 is controlled to start pushing, and the second delivery cylinder 2 continues to push the material (it is also noted that After the suction cylinder 1 completes the suction and switches to the second station, the first delivery cylinder 1 controls the first delivery cylinder 1 to start pushing the material before the second delivery cylinder 2 completes the pushing, and after the second delivery cylinder 2 completes the pushing, The spool 3 is adjusted to the third station. At this time, the first delivery cylinder 1 continues to push the material, and the second delivery cylinder 2 starts to suck, and before the first delivery cylinder 1 completes the pushing The second delivery cylinder 2 completes the suction, and then switches the spool 3 to the second station for a predetermined time before the first delivery cylinder 1 completes the pushing, so that the first delivery cylinder 1 is before the start of suction, the second The delivery cylinder 2 has started to push the material (of course, after the second delivery cylinder 2 completes the suction and switches to the second station, the second delivery cylinder 2 is controlled to start at a predetermined time before the first delivery cylinder 1 completes the pushing. Pushing the material, according to the order of the first station, the second station, the third station, the second station, and the first station, sequentially circulating, the continuous pumping process can be realized. In the pumping mechanism of the present invention, since the second station is added, when one of the pump cylinders has not yet finished, the other tank can start to push the material, and during the switching process of the spool 3, the pushing process is not interrupted. Therefore, the problem of discontinuous pumping can be solved and the pumping efficiency can be improved. It should be noted that the first delivery cylinder 1 and the second delivery cylinder 2 may be arranged according to the requirements of the pumping mechanism. Preferably, the first delivery cylinder 1 and the second delivery cylinder 2 are arranged side by side.

In the above technical solution, the distribution valve 8 can adopt various structures as long as it can be switched between the first, second and third stations. Preferably, the distribution valve 8 is provided with a partitioning portion 6, a valve. When the core 3 is in the second station, the partitioning portion 6 can disconnect the feed port of the distribution valve 8 from the discharge ports 4 of the first transfer cylinder 1, the second transfer cylinder 2 and the distribution valve 8, thus ensuring that In the case of the second station, the first delivery cylinder 1 and the second delivery cylinder 2 are only in communication with the discharge port 4.

In order to prevent material leakage, the distribution valve 8 is also provided with a sealing device, when the spool 3 is in the first work At the position and/or the second station and/or the third station, the spool 3 can be in contact with the sealing device to effectively prevent material leakage. It should be noted that the sealing device is specifically a gasket 5 . Specifically, the gasket 5 may be disposed on both sides of the partition portion 6, and at the same time, when the valve body 3 is in the first station and the third station, the sides of the valve core 3 are also in contact with the distribution valve 8 A gasket 5 is provided.

In the above technical solution, the pumping mechanism further includes a hopper 7 for charging, and the feed port of the distribution valve 8 is in communication with the hopper 7. In addition, the dispensing valve 8 is further provided with a discharge opening. Specifically, the discharge opening is disposed at the bottom of the distribution valve 8 for draining the remaining material in the distribution valve 8 after the pumping is completed, so as to prevent the remaining material from affecting the distribution valve. 8 lifetime.

In the above technical solution, if the cylinder diameters of the first delivery cylinder 1 and the second delivery cylinder 2 are 230 mm, the width of the partition portion 6 disposed between the left end of the first delivery cylinder 1 and the second delivery cylinder 2 is 250 to 260 mm. During the pumping operation, the valve core 3 of the distribution valve 8 continuously oscillates and stays at the first station, the second station and the third station respectively, that is, the left end of the first delivery cylinder 1 and the isolation portion 6, respectively. Upper and lower ends of the second delivery cylinder 2. When the spool 3 of the dispensing valve 8 is in the left end position of the first delivery cylinder 1, the first delivery cylinder 1 is in communication with the hopper 7 of the pumping mechanism, at which time the first delivery cylinder 1 is in the suction state and the second delivery The cylinder 2 is in communication with the discharge port 4 and is in a push state, as shown in FIG. 2 . When the spool 3 of the dispensing valve 8 is in the left end position of the second delivery cylinder 2, the second delivery cylinder 2 is in communication with the hopper 7 of the pumping mechanism, at which time the second delivery cylinder 2 is in the suction state, and the first delivery The cylinder 1 is in communication with the discharge port 4 and is in a push state, as shown in FIG. 4 . When the spool 3 of the dispensing valve 8 is on the partition 6, the first transfer cylinder 1 and the second transfer cylinder 2 are in a push state, as shown in FIG.

During the specific working process, when the first delivery cylinder 1 sucks, the second delivery cylinder 2 pushes the material, and the speed of the first delivery cylinder 1 is greater than the speed of the second delivery cylinder 2, at this time, the inlet of the distribution valve 8 passes through the valve. The core 3 is in communication with the first delivery cylinder 1, as shown in FIG. Since the speed of the first delivery cylinder 1 is larger than the speed of the second delivery cylinder 2, the second delivery cylinder 2 continues to push, the first delivery cylinder 1 has been sucked into place, and at this time, the distribution valve is The spool 3 of 8 is switched to the second station, that is, the position of the partition 6, as shown in FIG. Before the second delivery cylinder 2 pushes the material into position, the first delivery cylinder 1 starts to push the material, and at this time, the first delivery cylinder 1 and the second delivery cylinder 2 simultaneously push the material, and when the second delivery cylinder 2 pushes the material into position, the distribution valve 8 The spool 3 is switched to the end of the second delivery cylinder 2, and the second delivery cylinder 2 starts to suck, as shown in FIG. In this way, the discharge port 4 of the pumping mechanism always has material output, which realizes continuous pumping.

The pumping mechanism of the above structure has the following advantages:

First, the pumping continuity is good. The pumping mechanism of the above structure adds a second station during the pumping process, one of the two delivery cylinders is in the process of pushing the material, the other of the delivery cylinders can complete the suction, and the one of the delivery cylinders has not yet finished, and the other A transfer cylinder can start pushing. Therefore, the pumping efficiency can be effectively improved and the pumping continuity is better.

Secondly, the pumping efficiency is high and the construction quality is good. The pumping mechanism of the above structure has better pumping continuity, and the discharge does not occur sometimes during the working process. Therefore, the pumping efficiency is high and the construction quality can be better ensured.

Finally, the structure is simple and the use cost is low. Compared with the conventional pumping mechanism, the pumping mechanism of the above structure has the advantages of simple structure, high work efficiency and low use cost.

In another aspect, the present invention also provides a pumping control method for controlling the pumping mechanism, when the spool 3 of the dispensing valve 8 is switched from the first station to the third station and from the third station When switching to the first station, it passes through the second station. Since the pumping mechanism described above is employed, the second station is added during the commutation of the first delivery cylinder 1 and the second delivery cylinder 2, and the other delivery cylinder can start to push the material while the one cylinder is not finished. During the switching process of the spool 3, the pushing process is not interrupted. Therefore, the pumping continuity is better and the efficiency is effectively improved. It can be understood that, at some time of the first station, the second station and the third station, the first delivery cylinder 1 and the second delivery cylinder 2 may be in the process of pushing, sucking or stopping, depending on the pushing and sucking. Take time to control.

Specifically, when the spool 3 of the dispensing valve 8 is in the first station, the first delivery cylinder 1 draws the material, and the second delivery cylinder 2 pushes the material. When the spool 3 of the distribution valve 8 is in the second station, the first When at least one of the delivery cylinder 1 and the second delivery cylinder 2 pushes the material, and the valve body 3 of the distribution valve 8 is in the third position, the first delivery cylinder 1 pushes the material, and the second delivery cylinder 2 sucks. It can be understood that, in the second station, the feeding cylinder in the pushing state of the previous station can be continuously pushed, and before the pushing cylinder in the pushing state completes the pushing, the other conveying cylinder starts to push the material ( At this point, both transfer cylinders are in the push state).

The suction time of the first delivery cylinder 1 and the second delivery cylinder 2 is controlled to be smaller than the pushing time of the first delivery cylinder 1 and the second delivery cylinder 2, as needed, in the first delivery cylinder 1 or the second delivery cylinder 2 Before the pusher is completed, the spool 3 of the control distribution valve 8 is switched to the second station.

Figure 5 is a schematic view showing the movement of the piston of the first delivery cylinder 1 in an embodiment, and Figure 6 is a schematic diagram of the movement of the piston of the second delivery cylinder 2, the abscissa is used to indicate the unit time, the ordinate Used to indicate the advance or retreat of the piston.

During the time 0 to 1, the spool 3 is in the second station, and the first delivery cylinder 1 and the second delivery cylinder 2 simultaneously push the material. In this process, in order to eliminate the phenomenon of material interruption during the reversing process of the conveying cylinder, the first conveying cylinder 1 is started in advance. At time 1, the spool 3 of the dispensing valve 8 is changed to the left end of the second delivery cylinder 2 (i.e., the third station), the second delivery cylinder 2 starts to suck, and the first delivery cylinder 1 continues to push.

During the time 1 to 8, the second delivery cylinder 2 completes the suction. At time 8, the valve core 3 of the distribution valve 8 is switched to the isolation portion 6 (ie, the second station), and the second delivery cylinder 2 stops sucking, A delivery cylinder 1 continues to push.

During the time 8 to 10, the spool 3 of the dispensing valve 8 is on the partition 6, and the first transfer cylinder 1 continues to push.

During the time 10 to 11, the second delivery cylinder 2 starts to push, and the first delivery cylinder 1 continues to push.

At time 11, the spool 3 of the distribution valve 8 is switched to the left end of the first delivery cylinder 1 (i.e., the first station), the first delivery cylinder 1 starts to suck, and the second delivery cylinder 2 continues to push. At this point, complete a pumping. Then continuously switch the working state of the spool 3 and the delivery cylinder to achieve continuous pumping.

The invention also provides a concrete pumping apparatus comprising a pumping mechanism, the pumping mechanism being a pumping mechanism as described above. The concrete pumping device including the above pumping mechanism has the advantages of high work efficiency and good pumping continuity, and will not be described herein. In particular, the concrete pumping device can be a tow pump or a concrete pump truck or a vehicle pump.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., which are included in the spirit and scope of the present invention, should be included in the present invention. Within the scope of protection.

Claims

A pumping mechanism includes a first delivery cylinder (1), a second delivery cylinder (2), a distribution valve (8), and a valve core (3) swingingly disposed in the distribution valve (8), the distribution a valve (8) is in communication with one end of the first delivery cylinder (1) and the second delivery cylinder (2), the valve core (3) being in communication with a feed port of the distribution valve (8), characterized in that The spool (3) includes a first station, a second station, and a third station. In the first station, the first transfer cylinder (1) passes through the spool (3) and the feed The second delivery cylinder (2) is in communication with the discharge port (4) of the distribution valve (8); in the second station, the first delivery cylinder (1) and the second delivery cylinder (2) communicating with the discharge port (4); in the third station, the first transfer cylinder (1) is connected to the discharge port (4) of the distribution valve (8), The second delivery cylinder (2) communicates with the feed port through a spool (3).
The pumping mechanism according to claim 1, characterized in that the distribution valve (8) is provided with a partition (6), and in the second station, the partition (6) will The nozzle is disconnected from the first delivery cylinder (1), the second delivery cylinder (2), and the discharge port (4).
The pumping mechanism according to claim 2, wherein said dispensing valve (8) is provided with a sealing device, said first station and / or second station and / or third station The spool (3) is in contact with the sealing device.
Pumping mechanism according to claim 3, characterized in that the sealing means is a gasket (5).
The pumping mechanism according to any one of claims 1 to 4, characterized in that the pumping mechanism further comprises a hopper (7), a feed port of the distribution valve (8) and the hopper (7) ) Connected.
The pumping mechanism according to any one of claims 1 to 4, characterized in that the bottom of the dispensing valve (8) is provided with a discharge opening.
A pumping control method for controlling the pumping mechanism according to any one of claims 1 to 6, wherein the spool (3) is switched from a first station to a third station and When the third station is switched to the first station, the second station passes through the second station.
The pumping control method according to claim 7, wherein in the first station, the first delivery cylinder (1) sucks, and the second delivery cylinder (2) pushes, in the first a second station, at least one of the first delivery cylinder (1) and the second delivery cylinder (2) pushes the material, and in the third station, the first delivery cylinder (1) pushes the material, the first The second delivery cylinder (2) sucks.
The pumping control method according to claim 7, wherein the suction time of the first delivery cylinder (1) and the second delivery cylinder (2) is controlled to be smaller than the first delivery cylinder (1) and The pushing time of the two conveying cylinders (2) controls the spool (3) to switch to the second station before the first conveying cylinder (1) or the second conveying cylinder (2) is pushed.
A concrete pumping apparatus comprising a pumping mechanism, wherein the pumping mechanism is the pumping mechanism of any one of claims 1 to 6.