CN115750258A - Pasty material pumping device, engineering vehicle and pasty material pumping method - Google Patents

Abstract

The invention discloses a pasty material pumping device, an engineering vehicle and a pasty material pumping method, wherein the pasty material pumping device comprises: a feeding device; an output pipe; a pump group including a first pump and a second pump; the valve group comprises two material valves, each material valve comprises a valve body, a valve cavity, a valve core, a first communicating port, a second communicating port and a third communicating port, the first communicating port, the second communicating port and the third communicating port are communicated with the valve cavity, and the valve core is used for rotating in the valve cavity so as to enable the material valves to be switched between a first state that the first communicating port is closed by the valve core, a second state that the second communicating port is closed by the valve core and a third state that the first communicating port and the second communicating port are both closed by the valve core at the same time; the two material valves comprise a first material valve and a second material valve, a first communicating opening, a second communicating opening and a third communicating opening of the first material valve are communicated with the feeding device, the output pipeline and the first pump respectively, and a first communicating opening, a second communicating opening and a third communicating opening of the second material valve are communicated with the feeding device, the output pipeline and the second pump respectively.

Description

Pasty material pumping device, engineering vehicle and pasty material pumping method

Technical Field

The invention relates to the field of engineering machinery, in particular to a pasty material pumping device, an engineering vehicle and a pasty material pumping method.

Background

In the field of construction machinery, pumping equipment (pump trucks, vehicle-mounted pumps, trailer pumps, mortar pumps, etc.) including pumps such as piston pumps are generally used to pump pasty materials such as concrete. When the pump pumps the pasty materials, the pump firstly pumps the pasty materials from the feeding device and then pumps the pasty materials to the output pipeline. When the flow of the pasty materials pumped out to the output pipeline by the pump is unstable, the output pipeline can shake, and the length of the output pipeline is longer and longer, the shaking of the output pipeline caused by flow change in the construction process is more and more serious (even if the minimum interruption of the flow of the pasty materials such as concrete and the like can generate the change of the flow inertia of the concrete, so that the output pipeline shakes violently), so that the potential safety hazard exists for personnel who construct around the output pipeline, the service life of peripheral devices of the output pipeline, such as a fixing device (such as an arm support of a pump truck), can be greatly reduced, and the service life of the output pipeline can be greatly reduced.

Disclosure of Invention

The invention aims to provide a pasty material pumping device which can keep the flow rate of pasty materials in an output pipeline stable.

The invention discloses a pasty material pumping device in a first aspect, which comprises:

a feeding device for providing pasty materials;

the output pipeline is used for outputting the pasty materials;

a pump group including a first pump and a second pump for sucking the pasty material from the feed device and pumping the pasty material to the output pipeline;

the valve group comprises two material valves, each material valve comprises a valve body, a valve cavity arranged in the valve body, a valve core positioned in the valve cavity, and a first communication port, a second communication port and a third communication port which are arranged on the valve body and communicated with the valve cavity, and the valve core is used for rotating in the valve cavity so as 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 both closed by the valve core; the two material valves comprise a first material valve and a second material valve, a first communicating port, a second communicating port and a third communicating port of the first material valve are communicated with the feeding device, the output pipeline and the first pump respectively, and a first communicating port, a second communicating port and a third communicating port of the second material valve are communicated with the feeding device, the output pipeline and the second pump respectively.

In some embodiments, the valve element includes a rotating portion that rotates about a rotation axis, and a sealing portion that is slidably connected to the rotating portion in a radial direction with respect to the rotating portion, the sealing portion being configured to seal a communication port that is closed when the valve element closes the first communication port and/or the second communication port, the paste material pumping device further including a first driving device configured to drive the rotating portion to rotate about the rotation axis, and a first pressure providing device configured to provide a pressure to the sealing portion that tends the sealing portion to be away from the rotating portion in the radial direction with respect to the rotating portion when the valve element closes the first communication port and/or the second communication port.

In some embodiments, a sliding groove is formed in the rotating portion, the sealing portion is in sliding sealing fit with the sliding groove, and the first pressure providing device includes a pressure medium pumping device communicated with the sliding groove and used for pumping pressure medium to the sliding groove to provide the pressure to the sealing portion.

In some embodiments, the sealing device further includes a pressing portion and a sealing ring sleeved on an inner wall of the communication port of the first communication port and/or the second communication port, the pressing portion is configured to cooperate with the sealing ring, when the valve element closes the communication port corresponding to the sealing ring, the sealing ring is configured to press the valve element to seal the corresponding communication port, and the pressing portion provides a pressing force for pressing the sealing ring against the valve element.

In some embodiments, the sealing device includes a pressing portion and a sealing ring sleeved on an inner wall of the communication port of the second communication port, the pressing portion includes an elastic member, the elastic member is configured to be compressed by a pressure of the sealing ring when the valve core closes the communication port corresponding to the sealing ring, and a contraction cavity is formed, the contraction cavity decreases as the elastic member is compressed by the sealing ring, the contraction cavity of the elastic member of the first material valve is communicated with the second communication port of the second material valve, and the contraction cavity of the elastic member of the second material valve is communicated with the second communication port of the first material valve.

In some embodiments, the pressing portion further includes a pressing member in threaded connection with the valve body through a threaded member, the pressing member includes a blocking ring sleeved on an inner wall of the communication port of the second communication port, the blocking ring is located on one side of the sealing ring away from the valve cavity, the elastic member includes a C-shaped rubber spring, an accommodating cavity for accommodating the C-shaped rubber spring is formed between the blocking ring and the sealing ring, and the opening end of the C-shaped rubber spring forms the contraction cavity.

In some embodiments, the pressing portion includes a pressure air bag disposed between the sealing ring and the valve body, and a pressure gas pumping device communicated with the pressure air bag and used for pumping pressure gas to the pressure air bag to provide pressing force for pressing the sealing ring against the valve core when the valve core closes the communication port corresponding to the sealing ring.

In some embodiments, the apparatus further comprises a pressure detection device for detecting the pressure of the pasty material in the valve cavity of the material valve and the pressure of the pasty material in the output pipeline.

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

The invention discloses an engineering vehicle in a second aspect, which comprises any one of the pasty material pumping devices.

The third aspect of the present invention discloses a method for pumping paste material, which applies any one of the paste material pumping devices, and comprises:

step a, when the first pump pumps pasty materials to the output pipeline and the second pump pumps the pasty materials from the feeding device, enabling the first material valve to keep a first state and the second material valve to keep a second state;

b, when the first pump pumps the pasty materials to the output pipeline and the second pump boosts the pumped pasty materials, enabling the first material valve to keep a first state and the second material valve to keep a third state;

and c, when the first pump pumps pasty materials to the output pipeline and the second pump also pumps pasty materials to the output pipeline, enabling the first material valve to keep in a first state and the second material valve to keep in the first state.

In some embodiments, there is further provided a step d of switching the second material valve from the third state to the first state when the second pump pressurises the pumped mash material to equal the pressure of the mash material in the output conduit.

In some embodiments, the step c further comprises: step c1, after the second material valve is switched from the third state to the first state, enabling the flow rate of the pasty material pumped to the output pipeline by the second pump to be gradually increased, enabling the flow rate of the pasty material pumped to the output pipeline by the first pump to be gradually reduced, and enabling the sum of the flow rate of the pasty material pumped to the output pipeline by the first pump and the flow rate of the pasty material pumped to the output pipeline by the second pump to be kept unchanged.

In some embodiments, the first pump and the second pump are both piston pumps, and step c1 comprises: the speed of movement of the first pump's piston is progressively reduced and the speed of movement of the second pump's piston is progressively increased, with the speed of movement of the first pump's piston being reduced being equal to the speed of movement of the second pump's piston being increased.

Based on the pasty material pumping device provided by the invention, by arranging the first pump, the second pump and the first material valve and the second material valve which are connected among the first pump, the second pump, the feeding device and the output pipeline, the first pump and the second pump can alternately pump pasty materials, meanwhile, in the process of switching the working states of pumping the pasty materials by the first pump and the second pump, the first material valve and the second material valve can be set to be in the second state, so that the speed of pumping the pasty materials by one pump of the first pump and the second pump is accelerated, one pump of the first pump and the second pump is decelerated, the total pumping flow is kept unchanged, before the working states of pumping the pasty materials by the first pump and the second pump are switched, the material valve corresponding to the pump which has pumped the pasty materials but not pumped is switched to the third state, the pressure of the pumped pasty materials pumped by the pump is increased to be the same as the pressure of the pasty materials in the output pipeline, and then the working states are switched, so that the flow and the pressure of the pasty materials in the output pipeline are kept stable, and the working of the pasty material pumping device is safer and more reliable.

Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments of the invention, which proceeds with reference to the accompanying drawings.

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 application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic structural view of a pasty material pumping device according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the paste pumping device shown in FIG. 1;

fig. 3 is a schematic cross-sectional view of the paste material pumping device shown in fig. 2;

FIG. 4 is a schematic configuration view of the mushy material pumping device shown in FIG. 3 in one state;

fig. 5 is a schematic structural view of the pasty material pumping device shown in fig. 3 in another state;

fig. 6 is a schematic structural view of the pasty material pumping device shown in fig. 3 in yet another state;

fig. 7 is a schematic structural view of the paste material pumping device shown in fig. 3 in a further state;

fig. 8 is a schematic structural view of the pasty material pumping device shown in fig. 3 in yet another state;

fig. 9 is a schematic structural view of the paste material pumping device shown in fig. 3 in a further state;

fig. 10 is a schematic cross-sectional view showing a partial structure of a paste material pumping device according to another embodiment of the present invention;

fig. 11 is a further sectional structural view of a partial structure of the pasty material pumping device shown in fig. 10;

fig. 12 is a schematic cross-sectional view showing a partial structure of a paste material pumping device according to still another embodiment of the present invention;

fig. 13 is a partially enlarged schematic view of a portion H of the paste material pumping device shown in fig. 12;

fig. 14 is a partially enlarged schematic view of a portion E of the paste material pumping device shown in fig. 12;

FIG. 15 is a cross-sectional structural view showing a partial structure of a paste material pumping device according to still another embodiment of the invention;

fig. 16 is a cross-sectional structural view of a part of the structure of the paste material pumping device shown in fig. 15 in another state;

fig. 17 is a cross-sectional structural view of a part of the structure of the paste material pumping device shown in fig. 15 in a further state;

fig. 18 is a cross-sectional structural view showing a part of the structure of the paste material pumping device shown in fig. 15 in a further state.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present invention, it should be understood that the terms "first", "second", etc. are used to define the components, and are used only for the convenience of distinguishing the corresponding components, and if not otherwise stated, the terms have no special meaning, and thus, should not be construed as limiting the scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 18, the pumping device for pasty materials disclosed in the present embodiment includes a feeding device 1, an output pipe 2, a pump group, and a valve group.

The feed device 1 is used for supplying pasty materials, and the output pipeline 2 is used for outputting the pasty materials. The pasty materials comprise materials such as concrete, mortar, sludge and the like, and in building construction, the common pasty materials are concrete. In the embodiment shown in the figures, the feed device 1 comprises a hopper 11, the pasty material is placed in the hopper 11 and then pumped by a pump group into the output duct 2, and the pasty material is conveyed through the output duct 2 to the place where it is needed.

The pump group comprises a first pump 31 and a second pump 32 for sucking the pasty materials from the feed device 1 and pumping them towards the output duct 2. The first pump 31 and the second pump 32 are pumps capable of pumping the pasty material, and include piston pumps, gear pumps, vane pumps, and the like, and are piston pumps in the illustrated embodiment. The piston pump comprises a piston and a piston cylinder, in the embodiment shown in the figures the first pump 31 and the second pump 32 are both piston pumps, the first pump 31 comprising a first piston 311 and a first piston cylinder 312.

The valve block comprises two material valves 4. The material valve 4 includes a valve body 44, a valve chamber 45 provided in the valve body 44, a valve core 46 provided in the valve chamber 45, and a first communication port 41, a second communication port 42, and a second communication port 43 provided in the valve body 44 and communicating with the valve chamber 45. The valve body 46 is adapted to rotate in the valve chamber 45 so that the feed valve 4 is switched between a first state in which the first communication port 41 is closed by the valve body 46, a second state in which the second communication port 42 is closed by the valve body 46, and a third state in which both the first communication port 41 and the second communication port 42 are simultaneously closed by the valve body 46. That is, the valve core 46 rotates around a rotation axis, 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, the second communication port 42 is not closed, and at this time, the material valve 4 has a first state; when the valve core 46 rotates to the second rotation position, the valve core 46 closes the second communication port 42, but does not close the second communication port 41, and at this time, the material valve 4 has a second state; when the valve member 46 is rotated to the third rotational position, the valve member 46 closes the second communication port 42 together with the first communication port 41, and the material valve 4 has the third state. Rotation of the spool 46 about the axis of rotation may be accomplished by a spool drive device driving rotation of the spool, such as by a servo motor or hydraulic motor driving rotation of the spool 46.

The two material valves 4 comprise a first material valve 34 and a second material valve, and a first communication port 41, a second communication port 42 and a second communication port 43 of the first material valve 34 are respectively communicated with the feeding device 1, the output pipeline 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 communicate with the feeding device 1, the output pipe 2, and the second pump 32, respectively. In the embodiment shown in figures 1 and 2, the first communication port of the first material valve 34 communicates with the first outlet 111 of the hopper and the first communication port of the second material valve communicates with the second outlet 112 of the hopper. The first material valve can thus control whether the first pump 31 can suck the pasty material from the feed device through the first communication opening of the first material valve and whether the first pump 31 can pump the sucked pasty material out of the second communication opening of the first material valve to the output pipe 2. The second material valve may control whether the second pump 32 can suck the pasty material from the feed device through the second communication port of the second material valve and whether the second pump 32 can pump the sucked pasty material out of the second communication port of the second material valve to the output pipe 2.

In the embodiment, two material valves 4 with three communication ports and rotary valve cores are arranged, namely, the first material valve and the second material valve are respectively connected with the first pump, the second pump, the feeding device 1 and the output pipeline 2, the material valves are in three states through rotation of the valve cores, and the material valves 4 are switched among the first state, the second state and the third state, so that the pasty materials in the output pipeline 2 can keep stable flow under the alternate action of the first pump and the second pump.

The concrete operation can be illustrated by referring to an embodiment shown in fig. 4 to 9, and an example of the operation in which the first pump 31 pumps the concrete in one cycle is described, in the illustrated embodiment, the first pump is a piston pump, as shown in fig. 4, the first material valve is first in the second state, the first communication port of the first material valve is opened, the second communication port is closed, the first piston 311 moves in a direction away from the third communication port of the first material valve, the first pump 31 pumps the concrete from the feeding device 1 through the first communication port of the first material valve 34, after the first piston 311 reaches the far end limit position, as shown in fig. 5, the spool of the first material valve 34 rotates to a position shown in fig. 6, at this time, the first material valve 34 is in the third state, that is, the first communication port and the second communication port of the first material valve 34 are both closed by the spool, at this time, as shown in fig. 6, the first piston 311 moves in a direction toward the third communication port close to the first material valve, the first communication port and the second communication port of the first material valve 34 is opened, when the pressure of the first communication port and the second communication port of the concrete is raised, the second communication port of the first pump is switched to the second communication port, and the pressure of the second communication valve 7 is increased, and the pressure of the second communication port of the first communication valve is increased, as shown in fig. 6, and the pressure of the second communication port of the concrete output pipe is increased. At this time, the pressure of the concrete in the valve cavity and the first pump is the same as the pressure of the concrete in the output pipeline, and the first piston 311 of the first pump continues to move in the direction close to the third communication port, so that the concrete is pumped from the second communication port to the output pipeline. After the first piston 311 moves to the end-approaching limiting position, as shown in fig. 9, the valve core rotates in the direction of closing the second communication port, so that the first material valve is switched to the second state, then the first piston 311 moves in the direction of being away from the third communication port again, and the material is sucked from the feeding device through the first communication port again. During the pumping process of the pasty material pumping device, the working processes of the second pump and the second material valve are similar to the working processes of the first pump and the first material valve. The working periods of the first pump and the second pump have a phase difference, and in the process of pumping the paste material, the paste material pumping device of the embodiment pumps the paste material through the second pump separately to the output pipeline when the first pump pumps the paste material and the first pump boosts the pressure of the paste material, that is, when the first material valve 34 is in the second state and the third state, and at the moment, the second pump pumps the paste material to the output pipeline at a constant flow rate. When the second pump pumps the pasty materials to the output pipeline, the first pump also starts to pump the pasty materials to the output pipeline after the pressure of the first pump to the pasty materials is increased, namely the flow rate of the pasty materials pumped to the output pipeline by the first pump is gradually increased, the flow rate of the pasty materials pumped to the output pipeline by the second pump is controlled to be gradually reduced at the moment, the total flow rate of the pasty materials pumped to the output pipeline by the first pump and the second pump is kept the same as the flow rate of the pasty materials pumped to the first pump or the second pump by the second pump independently, when the flow rate of the pasty materials pumped by the first pump is increased to the maximum (namely the constant flow rate when the first pump independently pumps), the flow rate of the pasty materials pumped by the second pump is reduced to 0 at the moment, and the pasty materials pumped are switched to be pumped by the first pump independently.

In the paste material pumping device of the embodiment, by arranging the first pump 31, the second pump 32 and the first material valve 34 and the second material valve which are connected between the first pump 31, the second pump 32 and the feeding device 1 and the output pipeline 2, the first pump 31 and the second pump 32 can alternately pump paste materials, meanwhile, in the process of switching the working state of pumping the paste materials by the first pump 31 and the second pump 32, the first material valve 34 and the second material valve can be set to be in the second state, the speed of pumping the paste materials by one pump of the first pump 31 and the second pump 32 is accelerated and decelerated, the total pumping flow rate is kept unchanged, before the working state of pumping the paste materials by the first pump 31 and the second pump 32 is switched, the material valve 4 corresponding to the pump which does not pump the paste materials is pumped is switched to the third state, and the working state is switched when the pumped paste materials in the pump pair are boosted to the same pressure of the paste materials in the output pipeline 2, so that the flow rate and the pressure of the paste materials in the output pipeline 2 are kept stable, and the paste materials can be pumped by the pumping device more safely and more reliably.

In some embodiments, as shown in fig. 10 and 11, the spool 46 includes a rotating portion 461 that rotates about a rotational axis and a seal portion 462 that is slidably coupled to the rotating portion 461 in a radial direction with respect to the rotating portion 461, the radial direction being referred to with respect to the rotational axis. The sealing portion 462 is for sealing the communication port that is correspondingly closed when the valve body 46 closes the first communication port 41 and/or the second communication port 42, that is, the sealing portion 462 is for sealing the first communication port 41 when the valve body 46 closes the first communication port 41, the sealing portion 462 is for sealing the second communication port 42 when the valve body 46 closes the second communication port 42, and the sealing portion 462 is for sealing the first communication port 41 and the second communication port 42 when the valve body 46 simultaneously closes 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 may include a motor, a hydraulic motor, a gear, and other rotation driving devices, and a first pressure providing device 6, which is used to drive the rotation part 461 to rotate around the rotation axis. The first pressure supply device 6 is configured to supply the seal portion 462 with a pressure that tends to urge the seal portion 462 radially away from the rotating portion 461 with respect to the rotating portion 461 when the spool 46 closes the first communication port 41 and/or the second communication port 42. When the valve element closes the corresponding communication port, the sealing portion 462 tends to be away from the rotating portion 461, i.e., tends to press the corresponding communication port, under the action of the first pressure providing means, so that good sealing of the communication port can be achieved.

In some embodiments, as shown in fig. 10 and 11, the rotating portion 461 is provided with a sliding groove, the sealing portion 462 is in sliding sealing engagement with the sliding groove, and the first pressure providing device 6 includes a pressure medium pumping device communicated with the sliding groove, and the pressure medium pumping device is used for pumping pressure medium to the sliding groove to provide pressure to the sealing portion 462. The pressure medium pumping device may be an air pump or a hydraulic pump, and may provide the sealing part 462 with a pressure for compressing the communication port by pumping a pressure gas or hydraulic oil therein, and may adjust the magnitude of the preload of the sealing part 462 by controlling the magnitude of the pressure gas or hydraulic oil. In the embodiment shown in the figure, the pressure medium pumping device comprises a two-position two-way electromagnetic directional valve which comprises a pressure port P and a pressure relief port T.

In some embodiments, as shown in fig. 12 to 18, the paste material pumping device further includes a sealing device, the sealing device includes a pressing portion and a sealing ring 52 sleeved on an inner wall of the communication opening of the first communication opening 41 and/or the second communication opening 42, the sealing ring 52 is an annular structure sleeved on the inner wall of the communication opening of the first communication opening 41 and/or the second communication opening 42, the sealing ring 52 is capable of sliding in a radial direction relative to the inner wall of the communication opening, the radial direction takes a rotation center of the valve core as a reference center, and the sealing ring 52 is in sliding sealing fit with the inner wall of the communication opening. The pressing portion is configured to cooperate with the sealing ring 52, and when the valve element 46 closes the corresponding communication port of the sealing ring 52, the sealing ring 52 is configured to press the valve element 46 to seal the corresponding communication port, and the pressing portion provides a pressing force that causes the sealing ring 52 to press the valve element 46. The pressing force provided by the pressing portion causes the seal ring 52 to press against the valve element 46 when the valve element closes the communication port, thereby enabling good sealing to be achieved and the valve element to reliably close the corresponding communication port.

In some embodiments, as shown in fig. 12 to 14, the sealing device includes a pressing portion and a sealing ring 52 sleeved on an inner wall of the communication port of the second communication port 42, the pressing portion includes an elastic member 511, the elastic member 511 is configured to be contracted by a pressure of the sealing ring 52 and form a contraction cavity 5111 when the valve core 46 closes the communication port corresponding to the sealing ring 52, the contraction cavity 5111 is reduced as the elastic member 511 is increased by the pressure of the sealing ring 52, and the contraction cavity 5111 of the elastic member 511 of the first material valve 34 and the second communication port 42 of the second material valve communicate with each other, and the contraction cavity 5111 of the elastic member 511 of the second material valve communicates 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 mutually pressed, the contraction cavity 5111 in the second communication port 42 of the first material valve is communicated with the second communication port 42 of the second material valve at this time, the second material valve is in the first state, that is, the second pump is in the pumping state, the pasty material with pressure output by the second pump through the second communication port of the second material valve can enter the contraction cavity 5111 of the elastic member 511 of the second communication port 42 of the first material valve, the pressure of the pasty 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 further increases, the pressing force between the sealing ring 52 and the valve core can be increased, and the sealing effect is further improved. The same applies to the elastic member disposed contracting chamber 5111 in the second communicating port of the second material valve.

In some embodiments, as shown in fig. 12 to 14, the pressing portion further includes a pressing member screwed to the valve body 44 by a screw 513 (an oil screw 513 is also provided in fig. 14, not shown, and the arrangement structure is similar to that of fig. 13), the pressing member includes a stop ring 512 sleeved on the inner wall of the communication port of the second communication port 42, the stop ring 512 is located on a side of the sealing ring 52 away from the valve cavity 45, the elastic member 511 includes a C-shaped rubber spring, an accommodating cavity accommodating the C-shaped rubber spring is formed between the stop ring 512 and the sealing ring 52, and an open end of the C-shaped rubber spring forms a contraction cavity 5111. The open end of the C-shaped rubber spring is provided with a groove, and the cavity wrapped by the groove is the contraction cavity 5111. In this embodiment, the size of the extruded degree of the C-shaped rubber spring, that is, the pretightening force on the sealing ring 52, can be adjusted by adjusting the threaded fitting of the threaded member 513 and the valve body 44. When pasty materials with pressure enter the groove of the C-shaped rubber spring, the C-shaped rubber spring tends to open towards two sides, the pressure on the sealing ring 52 is further increased, and the sealing effect when the valve core closes the communication opening is improved.

In some embodiments, as shown in fig. 15 to 18, the pressing portion includes a pressure bladder 514 provided between the sealing ring 52 and the valve body 44, and a pressure gas pumping device 515 communicated with the pressure bladder 514, the pressure gas pumping device 515 being configured to pump pressure gas to the pressure bladder 514 to provide pressing force for pressing the sealing ring 52 against the valve core 46 when the valve core 46 closes the communication port corresponding to the sealing ring 52. The pressure gas pumping device 515 includes a gas pump.

In some embodiments, the mash material pumping apparatus further comprises a pressure detecting means for detecting the pressure of the mash material in the valve chamber 45 of the material valve 4 and the pressure of the mash material in the output pipe 2. The pressure detection means includes a pressure sensor. The pasty material pumping device also comprises a control device in signal connection with the pressure sensor, and the control device controls the valve core of the material valve to rotate according to the detection result of the pressure sensor.

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

In some embodiments, the engineering vehicle comprises any one of the pasty material pumping devices.

In some embodiments, a method for pumping pasty material is also disclosed, which uses any one of the pasty material pumping devices, including:

step a, when the first pump 31 pumps the pasty materials to the output pipeline 2 and the second pump 32 pumps the pasty materials from the feeding device 1, keeping the first material valve 34 in a first state and keeping the second material valve in a second state;

b, when the first pump 31 pumps the pasty materials to the output pipeline 2 and the second pump 32 boosts the pumped pasty materials, keeping the first material valve 34 in a first state and keeping the second material valve in a third state;

and c, when the first pump 31 pumps the pasty materials to the output pipeline 2 and the second pump 32 also pumps the pasty materials to the output pipeline 2, keeping the first material valve 34 in the first state and keeping the second material valve in the first state.

In some embodiments, the method of pumping the pasty material further comprises a step d of switching the second material valve from the third state to the first state when the second pump 32 boosts the pressure of the pumped pasty material to be equal to the pressure of the pasty material in the output pipe 2.

In some embodiments, step c further comprises: step c1, after the second material valve is switched from the third state to the first state, the flow rate of the pasty material pumped to the output pipeline 2 by the second pump 32 is gradually increased, the flow rate of the pasty material pumped to the output pipeline 2 by the first pump 31 is gradually reduced, and the sum of the flow rate of the pasty material pumped to the output pipeline 2 by the first pump 31 and the flow rate of the pasty material pumped to the output pipeline 2 by the second pump 32 is kept unchanged.

In some embodiments, the first pump 31 and the second pump 32 are both piston pumps, and step c1 comprises: the movement speed of the piston of the first pump 31 is gradually decreased and the movement speed of the piston of the second pump 32 is gradually increased, and the decreased movement speed of the piston of the first pump 31 is equal to the increased movement speed of the piston of the second pump 32.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the invention as defined by the appended claims.

Claims (14)

1. A pasty material pumping device, characterized by comprising:

a feed device (1) for providing a pasty material;

the output pipeline (2) is used for outputting the pasty materials;

-a pump group comprising a first pump (31) and a second pump (32) for sucking pasty materials from the feed device (1) and pumping them towards the output duct (2);

the valve group comprises two material valves, each material valve comprises a valve body (44), a valve cavity (45) arranged in the valve body (44), a valve core (46) positioned in the valve cavity (45), and a first communication port (41), a second communication port (42) and a third communication port (43) which are arranged on the valve body (44) and communicated with the valve cavity (45), wherein the valve core (46) is used for rotating in the valve cavity (45) so as to enable the material valves to be switched between a first state that the first communication port (41) is closed by the valve core (46), a second state that the second communication port (42) is closed by the valve core (46) and a third state that the first communication port (41) and the second communication port (42) are both closed by the valve core (46); the two material valves comprise a first material valve and a second material valve, a first communicating opening (41), a second communicating opening (42) and a third communicating opening (43) of the first material valve are respectively communicated with the feeding device (1), the output pipeline (2) and the first pump (31), and a first communicating opening (41), a second communicating opening (42) and a third communicating opening (43) of the second material valve are respectively communicated with the feeding device (1), the output pipeline (2) and the second pump (32).

2. The pasty material pumping device according to claim 1, characterized in that the valve element (46) comprises a rotating portion (461) rotating about a rotational axis and a sealing portion (462) connected to the rotating portion (461) slidably in the radial direction with respect to the rotating portion (461), the sealing portion (462) being configured to seal the communication port that is correspondingly closed when the valve element (46) closes the first communication port (41) and/or the second communication port (42), the pasty material pumping device further comprising a first driving means for driving the rotating portion (461) to rotate about the rotational axis and a first pressure providing means for providing the sealing portion (462) with a pressure that tends to move the sealing portion (462) away from the rotating portion (461) in the radial direction with respect to the rotating portion (461) when the valve element (46) closes the first communication port (41) and/or the second communication port (42).

3. The pasty material pumping device according to claim 2, wherein a chute is provided on the rotating portion (461), the sealing portion (462) is in sliding sealing engagement with the chute, and the first pressure providing means comprises a pressure medium pumping means communicating with the chute for pumping a pressure medium to the chute to provide the pressure to the sealing portion (462).

4. The pasty material pumping device according to claim 1, further comprising a sealing device, wherein the sealing device comprises a pressing portion and a sealing ring (52) sleeved on the inner wall of the communication port of the first communication port (41) and/or the second communication port (42), the pressing portion is used for being matched with the sealing ring (52), when the valve core (46) closes the corresponding communication port of the sealing ring (52), the sealing ring (52) is used for pressing the valve core (46) to seal the corresponding communication port, and the pressing portion provides pressing force for pressing the sealing ring (52) against the valve core (46).

5. The pasty material pumping device according to claim 4, wherein the sealing device comprises a pressing portion and a sealing ring (52) sleeved on the inner wall of the communication port of the second communication port (42), the pressing portion comprises an elastic member (511), the elastic member (511) is configured to be contracted by 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) is reduced along with the increase of the pressure of the elastic member (511) by the sealing ring (52), the contraction cavity (5111) of the elastic member (511) of the first material valve is communicated 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 communicated with the second communication port (42) of the first material valve.

6. The pasty material pumping device according to claim 5, wherein the pressing portion further comprises a pressing member screwed to the valve body (44) by a screw member, the pressing member comprises a stopper ring sleeved on the inner wall of the communication port of the second communication port (42), the stopper ring is located on the side of the sealing ring (52) away from the valve chamber (45), the elastic member (511) comprises a C-shaped rubber spring, an accommodating chamber for accommodating the C-shaped rubber spring is formed between the stopper ring and the sealing ring (52), and the open end of the C-shaped rubber spring forms the contraction chamber (5111).

7. The pasty material pumping device according to claim 4, characterized in that the pressing portion includes a pressure bladder provided between the seal ring (52) and the valve body (44) and a pressure gas pumping device communicating with the pressure bladder for pumping pressure gas to the pressure bladder to provide pressing force for pressing the seal ring (52) against the valve element (46) when the valve element (46) closes the communication port corresponding to the seal ring (52).

8. The pasty material pumping apparatus according to claim 1, further comprising pressure detecting means for detecting the pressure of the pasty material in the valve chamber (45) of the material valve and the pressure of the pasty material in the output pipe (2).

9. The pasty-material pumping device according to claim 1, characterized in that the output pipe (2) comprises an output main pipe (21) and a three-way pipe (22) having three connecting ports, the three connecting ports of the three-way pipe (22) are respectively connected with the output main pipe (21), the second communication port (42) of the first material valve and the second communication port (42) of the second material valve, the first pump (31) and the second pump (32) are piston pumps, the feeding device (1) comprises a hopper (11) and a stirring device (12) located in the hopper (11), and the hopper (11) is used for providing concrete.

10. A working vehicle, characterized by comprising the pasty material pumping device according to any one of claims 1 to 9.

11. A method of pumping pasty material, characterized by using the pasty material pumping apparatus according to any one of claims 1 to 9, comprising:

a step a of keeping the first material valve in a first state and keeping the second material valve in a second state when the first pump (31) pumps the pasty material to the output pipeline (2) and the second pump (32) pumps the pasty material from the feeding device (1);

b, when the first pump (31) pumps the pasty materials to the output pipeline (2) and the second pump (32) boosts the pressure of the pumped pasty materials, enabling the first material valve to keep a first state and the second material valve to keep a third state;

and c, when the first pump (31) pumps pasty materials to the output pipeline (2) and the second pump (32) also pumps pasty materials to the output pipeline (2), keeping the first material valve in a first state and keeping the second material valve in the first state.

12. The pasty material pumping apparatus according to claim 11, further comprising a step d of switching the second material valve from the third state to the first state when the second pump (32) boosts the pressure of the pumped pasty material to be equal to the pressure of the pasty material in the output pipe (2).

13. The pasty material pumping apparatus of claim 12, wherein step c further comprises: step c1, after the second material valve is switched from the third state to the first state, enabling the flow rate of the pasty materials pumped to the output pipeline (2) by the second pump (32) to be gradually increased, enabling the flow rate of the pasty materials pumped to the output pipeline (2) by the first pump (31) to be gradually reduced, and enabling the sum of the flow rate of the pasty materials pumped to the output pipeline (2) by the first pump (31) and the flow rate of the pasty materials pumped to the output pipeline (2) by the second pump (32) to be kept unchanged.

14. The pasty material pumping device according to claim 13, wherein the first pump (31) and the second pump (32) are both piston pumps, and the step c1 comprises: -gradually reducing the speed of movement of the pistons of the first pump (31) and gradually increasing the speed of movement of the pistons of the second pump (32), with the speed of movement of the pistons of the first pump (31) that is reduced being equal to the speed of movement of the pistons of the second pump (32) that is increased.

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