Paste material pumping apparatus, works vehicle, and paste material pumping method

Abstract

The application discloses a paste material pumping device, an engineering vehicle and a paste material pumping method. The paste material pumping device comprises a feeding device, an output pipeline, a pump group comprising a first pump and a second pump, and a valve group comprising two material valves. The material valve comprises a valve body, a valve cavity, a valve core and a first communication port, a second communication port and a third communication port in communication with the valve cavity. The valve core is used for rotating in the valve cavity to switch the material valve between a first state in which the first communication port is closed by the valve core, a second state in which the second communication port is closed by the valve core, and a third state in which the first communication port and the second communication port are both closed by the valve core. The two material valves comprise a first material valve and a second material valve. The first communication port, the second communication port and the third communication port of the first material valve are in communication with the feeding device, the output pipeline and the first pump respectively. The first communication port, the second communication port and the third communication port of the second material valve are in communication with the feeding device, the output pipeline and the second pump respectively.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of construction machines, and particularly to a paste material pumping device, a construction vehicle, and a paste material pumping method. BACKGROUND

[0002] In the field of construction machines, a pumping device (pump truck, truck-mounted pump, trailer-mounted pump, mortar pump, etc.) composed of a piston pump or the like is generally used to pump paste materials such as concrete. When pumping a paste material, the pump first sucks the paste material from a feeding device and then pumps the paste material to an output pipe. When the flow rate of the paste material pumped by the pump to the output pipe is unstable, the output pipe is shaken. As the length of the output pipe becomes longer, the shaking of the output pipe caused by the variation in the flow rate during construction becomes more severe (even a minimal interruption in the flow rate of the paste material such as concrete causes a change in the flow inertia of the concrete, resulting in a violent shaking of the output pipe), which poses a safety risk to the people working around the output pipe and greatly reduces the life of the devices around the output pipe such as a fixing device (e.g., a boom of a pump truck) and the life of the output pipe itself. SUMMARY

[0003] An object of the present application is to provide a paste material pumping device that can maintain the flow rate of a paste material in an output pipe stable.

[0004] A paste material pumping device according to a first aspect of the present application includes:

[0005] a feeding device for supplying a paste material;

[0006] an output pipe for outputting the paste material;

[0007] a pump group including a first pump and a second pump for sucking the paste material from the feeding device and pumping the paste material to the output pipe;

[0008] The valve group comprises two material valves, the material valve comprises a valve body, a valve cavity arranged in the valve body, a valve core arranged in the valve cavity, and a first communication port, a second communication port and a third communication port arranged on the valve body and communicated with the valve cavity, the valve core is used for rotating in the valve cavity to switch the material valve between a first state that the first communication port is closed by the valve core, a second state that the second communication port is closed by the valve core, and a third state that the first communication port and the second communication port are simultaneously closed by the valve core; wherein the two material valves comprise a first material valve and a second material valve, the first communication port, the second communication port and the third communication port of the first material valve are communicated with the feeding device, the output pipeline and the first pump respectively, and the first communication port, the second communication port and the third communication port of the second material valve are communicated with the feeding device, the output pipeline and the second pump respectively.

[0009] In some embodiments, the valve core comprises a rotating part rotating around a rotating axis and a sealing part slidably connected to the rotating part in a radial direction relative to the rotating part, the sealing part is used for sealing the corresponding closed communication port when the valve core closes the first communication port and / or the second communication port, and the paste material pumping device further comprises a first driving device used for driving the rotating part to rotate around the rotating axis, and a first pressure providing device used for providing the sealing part with a pressure tending to move the sealing part away from the rotating part in a radial direction relative to the rotating part when the valve core closes the first communication port and / or the second communication port.

[0010] In some embodiments, a sliding groove is arranged on the rotating part, the sealing part is in sliding sealing cooperation with the sliding groove, and the first pressure providing device comprises a pressure medium pumping device communicated with the sliding groove, the pressure medium pumping device is used for pumping pressure medium into the sliding groove to provide the sealing part with the pressure.

[0011] In some embodiments, a sealing device is further included, the sealing device comprises a pressing part and a sealing ring sleeved on the inner wall of the communication port of the first communication port and / or the second communication port, the pressing part is used for cooperating with the sealing ring, the sealing ring is used for pressing the valve core to seal the corresponding communication port when the valve core closes the corresponding communication port, and the pressing part provides a pressing force for the sealing ring to press the valve core.

[0012] In some embodiments, the sealing device comprises a pressing part and a sealing ring sleeved on the inner wall of the second communication port, the pressing part comprises an elastic member configured to be shrunk by the pressure of the sealing ring and form a shrinkage cavity when the valve core closes the corresponding communication port of the sealing ring, the shrinkage cavity decreases with the increase of the pressure of the sealing ring on the elastic member, the shrinkage cavity of the elastic member of the first material valve is in communication with the second communication port of the second material valve, and the shrinkage cavity of the elastic member of the second material valve is in communication with the second communication port of the first material valve.

[0013] In some embodiments, the pressing part further comprises a pressing member threadedly connected with the valve body through a threaded member, the pressing member comprises a blocking ring sleeved on the blocking ring sleeved on the inner wall of the second communication port, the blocking ring is located on the side of the sealing ring away from the valve cavity, the elastic member comprises a C-shaped rubber spring, a containing cavity containing the C-shaped rubber spring is formed between the blocking ring and the sealing ring, and the open end of the C-shaped rubber spring forms the shrinkage cavity.

[0014] In some embodiments, the pressing part comprises a pressure gas bag arranged between the sealing ring and the valve body and a pressure gas pumping device in communication with the pressure gas bag, the pressure gas pumping device is used for pumping pressure gas to the pressure gas bag to provide a pressing force for pressing the sealing ring against the valve core when the valve core closes the corresponding communication port of the sealing ring.

[0015] In some embodiments, a pressure detecting device is further included, and the pressure detecting device is used for detecting the pressure of the paste material in the valve cavity of the material valve and the pressure of the paste material in the output pipeline.

[0016] In some embodiments, the output pipeline comprises an output main pipeline and a three-way pipe having three connection ports, the three connection ports of the three-way pipe are connected with the output main pipeline, the second communication port of the first material valve and the second communication port of the second material valve respectively, the first pump and the second pump are both piston pumps, and the feeding device comprises a hopper and a stirring device arranged in the hopper, and the hopper is used for providing concrete.

[0017] The second aspect of the present application discloses an engineering vehicle comprising any of the paste material pumping devices.

[0018] The third aspect of the present application discloses a paste material pumping method applied to any of the paste material pumping devices, and the method comprises the following steps.

[0019] In step a, when the first pump pumps the paste material to the output pipeline and the second pump sucks the paste material from the feeding device, the first material valve is kept in a first state and the second material valve is kept in a second state.

[0020] Step b, when the first pump pumps paste material to the output pipeline and the second pump pressurizes the pumped paste material, keeping the first material valve in the first state and the second material valve in the third state;

[0021] Step c, when the first pump pumps paste material to the output pipeline and the second pump also pumps paste material to the output pipeline, keeping the first material valve in the first state and the second material valve in the first state.

[0022] In some embodiments, step d, when the second pump pressurizes the pumped paste material to the pressure of the paste material in the output pipeline, the second material valve is switched from the third state to the first state.

[0023] In some embodiments, step c further comprises step c1, after the second material valve is switched from the third state to the first state, gradually increasing the flow of the paste material pumped by the second pump to the output pipeline, gradually decreasing the flow of the paste material pumped by the first pump to the output pipeline, and keeping the sum of the flow of the paste material pumped by the first pump to the output pipeline and the flow of the paste material pumped by the second pump to the output pipeline unchanged.

[0024] In some embodiments, the first pump and the second pump are both piston pumps, and step c1 comprises gradually decreasing the movement speed of the piston of the first pump and gradually increasing the movement speed of the piston of the second pump, and the decreased movement speed of the piston of the first pump is equal to the increased movement speed of the piston of the second pump.

[0025] Based on the paste material pumping device provided by the present application, by arranging the first pump, the second pump, and the first material valve and the second material valve connected between the first pump, the second pump, the feeding device, and the output pipeline, the first pump and the second pump can alternately pump paste material, and during the switching of the working state of the first pump and the second pump for pumping paste material, the first material valve and the second material valve can be arranged in the second state, so that the speed of one of the first pump and the second pump for pumping paste material is accelerated and the speed of the other is decreased, and the total pumping flow remains unchanged. Before the working state of the first pump and the second pump for pumping paste material is switched, the material valve corresponding to the pump that has pumped all the paste material is switched to the third state, so that the pumped paste material is pressurized to the pressure of the paste material in the output pipeline, and then the working state is switched, so that the flow and pressure of the paste material in the output pipeline can be kept stable, and the working of the paste material pumping device is more safe and reliable.

[0026] Other features of the present application, and its particular advantages, will become apparent to those skilled in the art from the following detailed description, taken in combination with the appended drawings, in which: BRIEF DESCRIPTION OF DRAWINGS

[0027] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the application and together with the description, serve to explain the application. In the drawings:

[0028] Figure 1 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0029] Figure 2 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 1 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0030] Figure 3 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 2 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0031] Figure 4 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 3 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0032] Figure 5 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 3 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0033] Figure 6 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 3 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0034] Figure 7 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 3 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0035] Figure 8 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 3 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0036] Figure 9 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 3 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0037] Figure 10 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0038] Figure 11 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application; Figure 10 A schematic view of the structure of the paste material pumping device according to the embodiment of the present application;

[0039] Figure 12 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application;

[0040] Figure 13 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application; Figure 12 A partial enlarged view of H part of the paste material pumping device shown in FIG. 4;

[0041] Figure 14 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application; Figure 12 A partial enlarged view of E part of the paste material pumping device shown in FIG. 5;

[0042] Figure 15 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application;

[0043] Figure 16 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application; Figure 15 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application;

[0044] Figure 17 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application; Figure 15 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application;

[0045] Figure 18 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application; Figure 15 A cross-sectional view of a part of the paste material pumping device according to another embodiment of the present application. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative effort belong to the scope of protection of the present application.

[0047] The foregoing is considered as illustrative only of the principles of the application. Other variations and modifications can be made to the above-disclosed embodiments in accordance with the principles of the application. For example, the various elements of the application can be combined or eliminated. Thus, the above description is not intended to limit the scope of the application, as this scope is defined by the appended claims. Further, it is intended that all such alternatives, modifications and variations from the teachings or the principles of this application described herein, be considered as falling within the scope of the application. It is further intended that any specific structure, material or act described herein as being preferred, be considered as not limiting the scope of the application, unless otherwise specifically stated. Accordingly, the application is to be considered as limited only by the scope of the claims appended hereto.

[0048] In the description of the application, it is to be understood that the use of "first", "second", etc. words to describe various elements is only for the convenience, and does not necessarily limit the scope of the application, unless otherwise specifically stated.

[0049] In the description of the application, it is to be understood that the use of "first", "second", etc. words to describe various elements is only for the convenience, and does not necessarily limit the scope of the application, unless otherwise specifically stated.

[0050] For the convenience of description, spatial relative terms such as "on", "above", "upper", "top", etc. can be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawings is inverted, the device described as "above" or "on" the other device or structure will be positioned "below" or "under" the other device or structure. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations) and the spatial relative descriptions used herein will be interpreted accordingly.

[0051] As shown in the drawings, Figures 1 to 18 The paste material pumping device disclosed in the embodiment comprises a feeding device 1, an output pipeline 2, a pump group and a valve group.

[0052] The feeding device 1 is used to provide the paste material, and the output pipe 2 is used to output the paste material. The paste material includes concrete, mortar, sludge and other materials, and the common paste material in the construction is concrete. In the embodiment as shown in the figure, the feeding device 1 includes a hopper 11, the paste material is placed in the hopper 11, and then pumped into the output pipe 2 by the pump set, and the paste material is delivered to the place where the paste material is needed through the output pipe 2.

[0053] The pump set includes a first pump 31 and a second pump 32 used to pump the paste material from the feeding device 1 and to the output pipe 2. The first pump 31 and the second pump 32 are pumps capable of pumping the paste material, including piston pumps, gear pumps, vane pumps and the like, and are piston pumps in the embodiment as shown in the figure. The piston pump includes a piston and a piston cylinder, and in the embodiment as shown in the figure, the first pump 31 and the second pump 32 are both piston pumps, and the first pump 31 includes a first piston 311 and a first piston cylinder 312.

[0054] The valve set includes two material valves 4. The material valve 4 includes a valve body 44, a valve cavity 45 arranged in the valve body 44, a valve core 46 located in the valve cavity 45, and a first communication port 41, a second communication port 42 and a second communication port 43 arranged on the valve body 44 and communicated with the valve cavity 45. The valve core 46 is used to rotate in the valve cavity 45, so as to switch the material valve 4 between a first state in which the first communication port 41 is closed by the valve core 46, a second state in which the second communication port 42 is closed by the valve core 46, and a third state in which the first communication port 41 and the second communication port 42 are both closed by the valve core 46. That is, the valve core 46 rotates around a rotation axis, and when the valve core 46 rotates to different positions, the corresponding communication port can be closed. When the valve core 46 rotates to a first rotation position, the valve core 46 closes the first communication port 41 and does not close the second communication port 42, and at this time, the material valve 4 has the first state. When the valve core 46 rotates to a second rotation position, the valve core 46 closes the second communication port 42 and does not close the second communication port 41, and at this time, the material valve 4 has the second state. When the valve core 46 rotates to a third rotation position, the valve core 46 closes the first communication port 41 and the second communication port 42 at the same time, and at this time, the material valve 4 has the third state. The rotation of the valve core 46 around the rotation axis can be realized by driving the valve core to rotate through the valve core driving device, for example, the valve core 46 can be driven to rotate through a servo motor or a hydraulic motor.

[0055] The two material valves 4 include a first material valve 34 and a second material valve, and the first communication port 41, the second communication port 42 and the second communication port 43 of the first material valve 34 are respectively communicated with the feeding device 1, the output pipe 2 and the first pump 31. The first communication port 41, the second communication port 42 and the second communication port 43 of the second material valve are respectively communicated with the feeding device 1, the output pipe 2 and the second pump 32. In the embodiment as shown in the figure, the first material valve 34 is arranged on the first pump 31, and the second material valve is arranged on the second pump 32. Figure 1 and Figure 2In the shown embodiment, the first communication port of the first material valve 34 is in communication with the first output port 111 of the hopper, and the first communication port of the second material valve is in communication with the second output port 112 of the hopper. Thus, the first material valve can control whether the first pump 31 can suck the paste material from the feeding device through the first communication port of the first material valve, and control whether the first pump 31 can pump the sucked paste material from the second communication port of the first material valve to the output pipeline 2. The second material valve can control whether the second pump 32 can suck the paste material from the feeding device through the second communication port of the second material valve, and control whether the second pump 32 can pump the sucked paste material from the second communication port of the second material valve to the output pipeline 2.

[0056] In the embodiment, two material valves 4 with three communication ports and rotating valve cores are provided, i.e. the first material valve and the second material valve, to connect the first pump, the second pump and the feeding device 1 and the output pipeline 2 respectively. The material valve has three states by rotating the valve core, and the first pump and the second pump can be alternately used to keep the stable flow of the paste material in the output pipeline 2 by switching the material valve 4 between the first state, the second state and the third state.

[0057] The specific working process can be referred to Figures 4 to 9 An embodiment is shown to illustrate the working process of the first pump 31 sucking the concrete in a cycle. In the shown embodiment, the first pump is a piston pump, and the working process of the piston pump is shown as follows. Figure 4 Firstly, the first material valve is in the second state, the first communication port of the first material valve is open, the second communication port is closed, the first piston 311 moves away from the third communication port of the first material valve, the first pump 31 sucks the concrete from the feeding device 1 through the first communication port of the first material valve, and when the first piston 311 reaches the far end limit position, the first material valve 34 is rotated to the third state, the first communication port and the second communication port of the first material valve 34 are closed by the valve core, the first piston 311 moves towards the third communication port of the first material valve, and the pressure of the sucked concrete is increased. Figure 5 The valve core of the first material valve 34 is rotated to the position shown in the figure, and the first material valve 34 is in the third state, the first communication port and the second communication port of the first material valve 34 are closed by the valve core, the first piston 311 moves towards the third communication port of the first material valve, and the pressure of the sucked concrete is increased. Figure 6 The valve core of the first material valve 34 is rotated to the position shown in the figure, and the first material valve 34 is in the third state, the first communication port and the second communication port of the first material valve 34 are closed by the valve core, the first piston 311 moves towards the third communication port of the first material valve, and the pressure of the sucked concrete is increased. Figure 6 The valve core of the first material valve 34 is rotated to the position shown in the figure, and the first material valve 34 is in the third state, the first communication port and the second communication port of the first material valve 34 are closed by the valve core, the first piston 311 moves towards the third communication port of the first material valve, and the pressure of the sucked concrete is increased. Figure 7 The valve core of the first material valve 34 is rotated to the position shown in the figure, and the first material valve 34 is in the third state, the first communication port and the second communication port of the first material valve 34 are closed by the valve core, the first piston 311 moves towards the third communication port of the first material valve, and the pressure of the sucked concrete is increased. Figure 8The valve core is rotated again to open the second communication port, and the first material valve is switched to the first state. At this time, the pressure of the concrete in the valve cavity and the first pump is the same as that of the concrete in the output pipeline, and the first piston 311 of the first pump continues to move towards the third communication port to pump the concrete from the second communication port to the output pipeline. When the first piston 311 moves to the end limit position, as shown in Figure 9 The valve core is rotated to close the second communication port, and the first material valve is switched to the second state. Then, the first piston 311 moves away from the third communication port again to suck the material from the feeding device through the first communication port. During the pumping process of the paste material pumping device, the working process of the second pump and the second material valve is similar to that of the first pump and the first material valve. There is a phase difference between the working cycles of the first pump and the second pump. During the pumping process of the paste material, when the first material valve 34 is in the second state and the third state, i.e., the first piston 311 is pumping the paste material and boosting the pressure of the paste material, the second pump pumps the paste material to the output pipeline alone. At this time, the second pump pumps the paste material to the output pipeline at a constant flow rate. When the second pump pumps the paste material to the output pipeline, and the first pump completes the boosting of the pressure of the paste material and starts to pump the paste material to the output pipeline, i.e., the flow rate of the first pump gradually increases, the flow rate of the second pump pumping the paste material to the output pipeline is gradually reduced, so that the total flow rate of the first pump and the second pump pumping the paste material to the output pipeline remains the same as the flow rate when the first pump or the second pump pumps the paste material alone. When the flow rate of the first pump increases to the maximum (i.e., the constant flow rate when the first pump pumps the paste material alone), the flow rate of the second pump pumping the paste material is reduced to 0, and the pumping of the paste material is switched to be pumped by the first pump alone.

[0058] The paste material pumping device of the embodiment can alternately pump the paste material by the first pump 31 and the second pump 32, and can set the first material valve 34 and the second material valve to be in the second state during the switching of the working states of the first pump 31 and the second pump 32, so that the speed of one of the first pump 31 and the second pump 32 pumping the paste material is accelerated, and the speed of the other is reduced, and the total pumping flow rate remains unchanged. Before the working states of the first pump 31 and the second pump 32 are switched, the material valve 4 corresponding to the pump that has finished pumping the paste material is switched to the third state, so that the pumped paste material is boosted to the pressure of the paste material in the output pipeline 2, and then the working states are switched, so that the flow rate and the pressure of the paste material in the output pipeline 2 can be kept stable, and the working of the paste material pumping device is more safe and reliable.

[0059] In some embodiments, as shown in Figure 10 and Figure 11 The valve core 46 includes a rotating part 461 rotating around a rotating axis and a sealing part 462 slidably connected to the rotating part 461 in a radial direction with respect to the rotating axis. The sealing part 462 is used to seal the corresponding communication port when the valve core 46 closes the first communication port 41 and / or the second communication port 42. When the valve core 46 closes the first communication port 41, the sealing part 462 is used to seal the first communication port 41. When the valve core 46 closes the second communication port 42, the sealing part 462 is used to seal the second communication port 42. When the valve core 46 closes both the first communication port 41 and the second communication port 42, the sealing part 462 is used to seal both the first communication port 41 and the second communication port 42. The paste material pumping device further includes a first driving device, i.e. a valve core driving device, which can include a motor, a hydraulic motor, a gear, etc. rotating driving device, and a first pressure providing device 6. The first driving device is used to drive the rotating part 461 to rotate around the rotating axis. The first pressure providing device 6 is used to provide the sealing part 462 with a pressure tending to move the sealing part 462 away from the rotating part 461 in the radial direction with respect to the rotating axis when the valve core 46 closes the first communication port 41 and / or the second communication port 42. When the valve core closes the corresponding communication port, the sealing part 462 tends to move away from the rotating part 461 under the action of the first pressure providing device, i.e. tends to press the corresponding communication port, so as to achieve good sealing of the communication port.

[0060] In some embodiments, as shown in Figure 10 and Figure 11 The rotating part 461 is provided with a sliding groove, and the sealing part 462 is in sliding sealing cooperation with the sliding groove. The first pressure providing device 6 includes a pressure medium pumping device in communication with the sliding groove, and the pressure medium pumping device is used to pump pressure medium into the sliding groove to provide the sealing part 462 with pressure. The pressure medium pumping device can be a gas pump or a hydraulic pump, which can provide the sealing part 462 with pressure for pressing the communication port by pumping pressure gas or hydraulic oil into the pressure medium pumping device. The pressure of the pressure gas or hydraulic oil can be controlled to adjust the pre-tightening force of the sealing part 462. In the embodiment shown in the figure, the pressure medium pumping device includes a two-position two-way electromagnetic reversing valve, which includes a pressure port P and a pressure relief port T.

[0061] In some embodiments, as shown in Figures 12 to 18As shown, the sealing device comprises a pressing part and a sealing ring 52 sleeved on the inner wall of the communication port of the second communication port 42. The pressing part comprises an elastic member 511 which is configured to be contracted by the pressure of the sealing ring 52 when the valve core 46 closes the corresponding communication port of the sealing ring 52 and forms a contraction cavity 5111. The contraction cavity 5111 decreases with the increase of the pressure of the elastic member 511. The contraction cavity 5111 of the elastic member 511 of the first material valve 34 is in communication with the second communication port 42 of the second material valve, and the contraction cavity 5111 of the elastic member 511 of the second material valve is in communication with the second communication port 42 of the first material valve 34. When the first material valve 34 of the first pump is in the second state or the third state, the valve core 46 and the sealing ring in the second communication port 42 of the first material valve are pressed against each other. At this time, the contraction cavity 5111 in the second communication port 42 of the first material valve is in communication with the second communication port 42 of the second material valve. The second material valve is in the first state, that is, the second pump is in the pumping state. The paste material with pressure output by the second material valve through the second communication port can enter the contraction cavity 5111 of the elastic member 511 of the first material valve through the second communication port 42. The pressure of the paste material with pressure makes the contraction cavity 5111 tend to increase, so that the pressing force between the elastic member 511 and the sealing ring 52 is further increased, so that the pressing force between the sealing ring 52 and the valve core is increased, and the sealing effect is further improved. The elastic member in the second communication port of the second material valve is also provided with a contraction cavity 5111.

[0062] In some embodiments, as shown in Figures 12 to 14 As shown, the sealing device comprises a pressing part and a sealing ring 52 sleeved on the inner wall of the communication port of the second communication port 42. The pressing part comprises an elastic member 511 which is configured to be contracted by the pressure of the sealing ring 52 when the valve core 46 closes the corresponding communication port of the sealing ring 52 and forms a contraction cavity 5111. The contraction cavity 5111 decreases with the increase of the pressure of the elastic member 511. The contraction cavity 5111 of the elastic member 511 of the first material valve 34 is in communication with the second communication port 42 of the second material valve, and the contraction cavity 5111 of the elastic member 511 of the second material valve is in communication with the second communication port 42 of the first material valve 34. When the first material valve 34 of the first pump is in the second state or the third state, the valve core 46 and the sealing ring in the second communication port 42 of the first material valve are pressed against each other. At this time, the contraction cavity 5111 in the second communication port 42 of the first material valve is in communication with the second communication port 42 of the second material valve. The second material valve is in the first state, that is, the second pump is in the pumping state. The paste material with pressure output by the second material valve through the second communication port can enter the contraction cavity 5111 of the elastic member 511 of the first material valve through the second communication port 42. The pressure of the paste material with pressure makes the contraction cavity 5111 tend to increase, so that the pressing force between the elastic member 511 and the sealing ring 52 is further increased, so that the pressing force between the sealing ring 52 and the valve core is increased, and the sealing effect is further improved. The elastic member in the second communication port of the second material valve is also provided with a contraction cavity 5111.

[0063] In some embodiments, as shown in Figures 12 to 14 As shown, the pressing part further comprises a pressing member 512 which is threadedly connected with the valve body 44 through a threaded member 513. Figure 14 The threaded member 513 is also provided in the elastic member in the second communication port of the second material valve, not shown, and the structure is the same as that of the first material valve. Figure 13The compression part includes a blocking ring 512 sleeved on the inner wall of the second communication port 42, and the blocking ring 512 is located on the side of the sealing ring 52 away from the valve cavity 45. The elastic part 511 includes a C-shaped rubber spring, and the blocking ring 512 and the sealing ring 52 form a cavity for accommodating the C-shaped rubber spring, and the open end of the C-shaped rubber spring forms a contraction cavity 5111. The open end of the C-shaped rubber spring has a groove, and the groove wraps the cavity, i.e., the contraction cavity 5111. In this embodiment, the degree of compression of the C-shaped rubber spring can be adjusted by adjusting the screwing of the adjusting screw 513 and the valve body 44, that is, the pre-tightening force of the sealing ring 52 can be adjusted. When the paste material with pressure enters the groove of the C-shaped rubber spring, the C-shaped rubber spring tends to expand to both sides, and the pressure on the sealing ring 52 is further increased, thereby improving the sealing effect when the valve core closes the communication port.

[0064] In some embodiments, as shown in Figures 15 to 18 The compression part includes a pressure gas bag 514 arranged between the sealing ring 52 and the valve body 44, and a pressure gas pumping device 515 in communication with the pressure gas bag 514, and the pressure gas pumping device 515 is used for pumping pressure gas to the pressure gas bag 514 to provide a compression force for compressing the sealing ring 52 against the valve core 46 when the valve core 46 closes the corresponding communication port of the sealing ring 52. The pressure gas pumping device 515 includes a gas pump.

[0065] In some embodiments, the paste material pumping device further includes a pressure detection device for detecting the pressure of the paste material in the valve cavity 45 of the material valve 4 and the pressure of the paste material in the output pipeline 2. The pressure detection device includes a pressure sensor. The paste material pumping device further includes a control device in signal connection with the pressure sensor, and the control device controls the rotation of the valve core of the material valve according to the detection result of the pressure sensor.

[0066] In some embodiments, the output pipeline 2 includes an output main pipeline 21 and a three-way pipe 22 having three connection ports, and the three connection ports of the three-way pipe 22 are connected with the output main pipeline 21, the second communication port 42 of the first material valve 34, and the second communication port 42 of the second material valve, respectively. The first pump 31 and the second pump 32 are both piston pumps, and the feeding device 1 includes a hopper 11 and a stirring device 12 in the hopper 11, and the hopper 11 is used for providing concrete.

[0067] In some embodiments, an engineering vehicle is also disclosed, and the engineering vehicle includes any of the paste material pumping devices.

[0068] In some embodiments, a paste material pumping method is also disclosed, and any of the paste material pumping devices is applied, and the method includes:

[0069] Step a, keeping the first material valve 34 in the first state and the second material valve in the second state while the first pump 31 pumps the paste material to the output pipeline 2 and the second pump 32 sucks the paste material from the feeding device 1;

[0070] Step b, keeping the first material valve 34 in the first state and the second material valve in the third state while the first pump 31 pumps the paste material to the output pipeline 2 and the second pump 32 pressurizes the sucked paste material;

[0071] Step c, keeping the first material valve 34 in the first state and the second material valve in the first state while the first pump 31 pumps the paste material to the output pipeline 2 and the second pump 32 also pumps the paste material to the output pipeline 2.

[0072] In some embodiments, the paste material pumping method further comprises step d, switching the second material valve from the third state to the first state when the second pump 32 pressurizes the sucked paste material to the pressure of the paste material in the output pipeline 2.

[0073] In some embodiments, step c further comprises step c1, gradually increasing the flow of the paste material pumped by the second pump 32 to the output pipeline 2 and gradually decreasing the flow of the paste material pumped by the first pump 31 to the output pipeline 2 after the second material valve is switched from the third state to the first state, and keeping the sum of the flow of the paste material pumped by the first pump 31 to the output pipeline 2 and the flow of the paste material pumped by the second pump 32 to the output pipeline 2 unchanged.

[0074] In some embodiments, the first pump 31 and the second pump 32 are both piston pumps, and step c1 comprises gradually decreasing the movement speed of the piston of the first pump 31 and gradually increasing the movement speed of the piston of the second pump 32, and keeping the decreased movement speed of the piston of the first pump 31 equal to the increased movement speed of the piston of the second pump 32.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit the technical solutions of the present application; although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the specific embodiments of the present application can be modified or some technical features can be replaced by equivalent replacements; without departing from the spirit of the technical solutions of the present application, they should be covered in the technical solution range of the present application claimed.

Claims

1. A pumping device for paste-like materials, characterized in that, include: Feeding device (1) is used to provide paste-like material; Output pipe (2) is used to output paste-like material; The pump assembly includes a first pump (31) and a second pump (32) for drawing paste material from the feed device (1) and pumping paste material into the output pipe (2). The valve assembly includes two material valves. Each material valve includes a valve body (44), a valve cavity (45) located within the valve body (44), a valve core (46) located within the valve cavity (45), and a first connecting port (41), a second connecting port (42), and a third connecting port (43) located on the valve body (44) and communicating with the valve cavity (45). The valve core (46) is used to rotate within the valve cavity (45) to allow the material valve to be in a first state where the first connecting port (41) is closed by the valve core (46), a second state where the second connecting port (42) is closed by the valve core (46), and a third connecting port (43) where the first connecting port (41) is closed by the valve core (46). The process switches between a third state in which both the inlet (41) and the second connecting port (42) are simultaneously closed by the valve core (46); wherein the two material valves include a first material valve and a second material valve, the first connecting port (41), the second connecting port (42) and the third connecting port (43) of the first material valve are respectively connected to the feeding device (1), the output pipe (2) and the first pump (31), and the first connecting port (41), the second connecting port (42) and the third connecting port (43) of the second material valve are respectively connected to the feeding device (1), the output pipe (2) and the second pump (32).

2. The paste-like material pumping device as described in claim 1, characterized in that, The valve core (46) includes a rotating part (461) that rotates about a rotation axis and a sealing part (462) that is radially slidably connected to the rotating part (461) relative to the rotating part (461). The sealing part (462) is used to seal the corresponding closed communication port when the valve core (46) closes the first communication port (41) and / or the second communication port (42). The paste material pumping device also includes a first driving device and a first pressure providing device. The first driving device is used to drive the rotating part (461) to rotate about the rotation axis. The first pressure providing device is used to provide pressure to the sealing part (462) when the valve core (46) closes the first communication port (41) and / or the second communication port (42), causing the sealing part (462) to radially move away from the rotating part (461) relative to the rotating part (461).

3. The paste-like material pumping device as described in claim 2, characterized in that, The rotating part (461) is provided with a sliding groove, and the sealing part (462) slides and seals with the sliding groove. The first pressure providing device includes a pressure medium pumping device that communicates with the sliding groove. The pressure medium pumping device is used to pump pressure medium into the sliding groove to provide the pressure to the sealing part (462).

4. The paste-like material pumping device as described in claim 1, characterized in that, It also includes a sealing device, which includes a pressing part and a sealing ring (52) sleeved on the inner wall of the first communication port (41) and / or the second communication port (42). The pressing part is used to cooperate with the sealing ring (52). When the valve core (46) closes the communication port corresponding to the sealing ring (52), the sealing ring (52) is used to press the valve core (46) to seal the corresponding communication port. The pressing part provides a pressing force to press the sealing ring (52) against the valve core (46).

5. The paste-like material pumping device as described in claim 4, characterized in that, The sealing device includes a pressing part and a sealing ring (52) sleeved on the inner wall of the second communication port (42). The pressing part includes an elastic element (511). The elastic element (511) is configured to contract under the pressure of the sealing ring (52) when the valve core (46) closes the communication port corresponding to the sealing ring (52) and form a contraction cavity (5111). The contraction cavity (5111) decreases as the pressure of the sealing ring (52) on the elastic element (511) increases. The contraction cavity (5111) of the elastic element (511) of the first material valve is connected to the second communication port (42) of the second material valve. The contraction cavity (5111) of the elastic element (511) of the second material valve is connected to the second communication port (42) of the first material valve.

6. The paste-like material pumping device as described in claim 5, characterized in that, The clamping part further includes a clamping member that is threadedly connected to the valve body (44) via a threaded component. The clamping member includes a retaining ring sleeved on the inner wall of the communication port (42) sleeved on the second communication port (42). The retaining ring is located on the side of the sealing ring (52) away from the valve cavity (45). The elastic member (511) includes a C-shaped rubber spring. A receiving cavity for accommodating the C-shaped rubber spring is formed between the retaining ring and the sealing ring (52). The open end of the C-shaped rubber spring forms the contraction cavity (5111).

7. The paste-like material pumping device as described in claim 4, characterized in that, The pressing part includes a pressure bladder disposed between the sealing ring (52) and the valve body (44) and a pressure gas pumping device communicating with the pressure bladder. The pressure gas pumping device is used to pump pressure gas into the pressure bladder to provide a pressing force that causes the sealing ring (52) to press the valve core (46) when the valve core (46) closes the corresponding communication port of the sealing ring (52).

8. The paste-like material pumping device as described in claim 1, characterized in that, It also includes a pressure detection device for detecting the pressure of the paste material in the valve chamber (45) of the material valve and the pressure of the paste material in the output pipe (2).

9. The paste-like material pumping device as described in claim 1, characterized in that, The output pipe (2) includes an output main pipe (21) and a three-way pipe (22) with three connection ports. The three connection ports of the three-way pipe (22) are respectively connected to the output main pipe (21), the second connection port (42) of the first material valve and the second connection port (42) of the second material valve. The first pump (31) and the second pump (32) are both piston pumps. The feeding device (1) includes a hopper (11) and a stirring device (12) located in the hopper (11). The hopper (11) is used to provide concrete.

10. An engineering vehicle, characterized in that, Includes the paste-like material pumping device as described in any one of claims 1 to 9.

11. A method for pumping a paste-like material, characterized in that, The application of the paste-like material pumping device as described in any one of claims 1 to 9 includes: Step a, when the first pump (31) pumps the paste material into the output pipe (2) and the second pump (32) draws the paste material from the feed device (1), the first material valve is kept in the first state and the second material valve is kept in the second state; Step b, when the first pump (31) pumps the paste material into the output pipe (2) and the second pump (32) pressurizes the sucked paste material, the first material valve is kept in the first state and the second material valve is kept in the third state; Step c: When the first pump (31) pumps paste material into the output pipe (2) and the second pump (32) also pumps paste material into the output pipe (2), the first material valve is kept in the first state and the second material valve is kept in the first state.

12. The method for pumping paste-like materials as described in claim 11, characterized in that, It also includes step d, in which the second material valve switches from the third state to the first state when the second pump (32) pressurizes the drawn paste material to the same pressure as the paste material in the output pipe (2).

13. The method for pumping paste-like materials as described in claim 12, characterized in that, Step c further includes: step c1, after the second material valve switches from the third state to the first state, the flow rate of the paste material pumped by the second pump (32) to the output pipe (2) is gradually increased, and the flow rate of the paste material pumped by the first pump (31) to the output pipe (2) is gradually decreased, and the sum of the flow rate of the paste material pumped by the first pump (31) to the output pipe (2) and the flow rate of the paste material pumped by the second pump (32) to the output pipe (2) remains unchanged.

14. The method for pumping paste-like materials as described in claim 13, characterized in that, Both the first pump (31) and the second pump (32) are piston pumps. Step c1 includes: gradually decreasing the movement speed of the piston of the first pump (31) and gradually increasing the movement speed of the piston of the second pump (32), and making the decrease in the movement speed of the piston of the first pump (31) equal to the increase in the movement speed of the piston of the second pump (32).

Images