WO2019201041A1

WO2019201041A1 - Closed concrete pumping mechanism having no receiving hopper

Info

Publication number: WO2019201041A1
Application number: PCT/CN2019/078413
Authority: WO
Inventors: 盛富春
Original assignee: 烟台盛利达工程技术有限公司
Priority date: 2018-04-16
Filing date: 2019-03-18
Publication date: 2019-10-24
Also published as: CN108265984A

Abstract

A closed concrete pumping mechanism having no receiving hopper, comprising an input tube (1), an output tube (4), two sets of plunger pumps (5) and a dispensing valve. The dispensing valve comprises a fixed block (2) and a movable block (3), and the dispensing valve has a first pump port connection end, a second pump port connection end, a first input end, a second input end and an output end. When the dispensing valve is in a first position, a first feeding/discharging passage is in communication with a first feeding passage, and a second feeding/discharging passage is in communication with a first discharging passage. When the dispensing valve is in a second position, the first feeding/discharging passage is in communication with the first discharging passage, and the second feeding/discharging passage is in communication with a second feeding passage. The concrete pumping mechanism having no receiving hopper improves the effect of heat preservation and moisturizing and avoids material leakage and spillage, the feeding is timely and accurate, and the cleaning is easy.

Description

Closed concrete pumping mechanism without hopper

Technical field

The invention relates to a mechanism for pumping concrete.

Background technique

The existing concrete pump trucks are equipped with a hopper, which feeds the open hopper through an open chute, which in turn draws in concrete through a feed port provided in the hopper.

The existing feeding and pumping methods have the following defects: 1. Poor moisture retention, easy temperature loss, easy evaporation of water; 2. Easy spillage and waste; 3. The concrete in the hopper needs constant stirring, and During the process of stirring and stirring, the temperature and humidity are further lost, the slump is further reduced, and only water can be added to normal construction, which makes it difficult for this part of concrete to meet the quality requirements and affect the building quality. 4. Concrete pumping trucks are required for pumping construction. The pump trucks are operated separately, and it is easy to see that the connection is not good, and the feeding is not timely, and the feeding is too much; 5. In the construction process, the replacement of the mixer truck will cause the construction to be interrupted; 6. It is not conducive to meeting the present and future. “Four sections and one environmental protection” green construction, as well as high quality and high security green building requirements; 7, is not conducive to the realization of intelligent, automated, efficient construction, affecting the technical progress of concrete construction machinery; 8, concrete is easy to assemble in the In the hopper, one is to exert the effect of the ideal work effect, the second is to clean up when the assembly is serious, and the third is to need daily Li, also only affects devices using time-consuming; 9, the pump stops washing pump difficult to start the pump complicated process.

technical problem

The invention provides a closed concrete pumping mechanism without hopper, the purpose of which is to improve concrete quality, automation degree, work efficiency, and reduce energy consumption and workload.

Technical solution

The technical scheme of the present invention is as follows:

A closed concrete pumping mechanism without hopper, comprising a distribution valve, an input pipe, an output pipe and two sets of plunger pumps;

The dispensing valve includes a fixed block and a movable block that is movably engaged with the fixed block;

The dispensing valve has a first pump port connection end, a second pump port connection end, a first input end, a second input end, and an output end;

The input pipe has two discharge ends that are in one-to-one correspondence with the two input ends of the delivery valve;

The two pump port connection ends of the distribution valve are arranged on the fixed block, and are connected and connected one by one with the pump ports of the two sets of plunger pumps;

The feed end of the output pipe is connected to the output end of the delivery valve;

The fixing block is provided with a first inlet and outlet channel and a second inlet and outlet channel, the outer end of the first inlet and outlet channel is a first pump port connection end, and the outer end of the second inlet and outlet channel is a second Pump port connection end;

a first discharge channel, a first feed channel and a second feed channel are disposed in the movable block; the first feed channel is configured to communicate with a first input end of the dispensing valve, the second input a material passage for communicating with a second input end of the dispensing valve; the first discharge passage for communicating with an output end of the dispensing valve;

The dispensing valve has at least a first station and a second station that move the movable block relative to the fixed block; when the movable block is located at the first station, the first inlet and outlet channels are in communication with the first feeding channel, The second inlet and outlet channels are in communication with the first discharge channel, and the second inlet channel is closed; when the movable block is in the second station, the first inlet and outlet channels are in communication with the first discharge channel, and the second inlet and outlet are connected The passage is in communication with the second feed passage, and the first feed passage is closed.

As a further improvement of the present invention, the fixing block has a first sliding contact surface with the movable block;

The inner ends of the first inlet and outlet channels and the second inlet and outlet channels are disposed at a first sliding contact surface, the discharge end of the first inlet channel, the discharge end of the second inlet channel, and the first outlet The feeding end of the material passage is also disposed at the first sliding contact surface, so that when the movable block is in the first working position, the feeding end of the first feeding passage and the feeding end of the first discharging passage are respectively respectively The inner end of the inlet and outlet channels and the inner end of the second inlet and outlet channels are in one-to-one correspondence, and the second inlet channel is closed at the first sliding contact surface, and the first discharging device is in the second station. The feeding end of the channel and the discharging end of the second feeding channel are respectively in one-to-one correspondence with the inner end of the first inlet and outlet channel and the inner end of the second inlet and outlet channel, and the first feeding channel is at the first sliding contact surface The office was closed.

As a further improvement of the present invention, the first feed passage is for communicating with a first input end of the dispensing valve, and the second feed passage is for communicating with the second input end of the dispensing valve, which means:

The input pipe is flexible, the first input end of the dispensing valve is disposed at the feeding end of the first feeding channel, and the second input end of the dispensing valve is disposed at the feeding end of the second feeding channel;

Or a second sliding contact surface between the fixed block and the movable block, wherein the fixed block is further provided with a third feeding channel and a fourth feeding channel, and the feeding end of the third feeding channel is a first input end of the dispensing valve, a feed end of the fourth feed channel, that is, a second input end of the dispensing valve, a discharge end of the third feed channel, and a discharge end of the fourth feed channel At the second sliding contact surface, the feed end of the first feed channel and the feed end of the second feed channel are also disposed at the second sliding contact surface so that when the movable block is in the first station, the third The discharge end of the feed passage is correspondingly connected with the feed end of the first feed passage, the discharge end of the fourth feed passage is closed at the second sliding contact surface, and the third block is when the movable block is at the second station. The discharge end of the material passage is closed at the second sliding contact surface, and the discharge end of the fourth inlet passage is correspondingly connected to the feeding end of the second inlet passage.

As a further improvement of the present invention, the first discharge passage is used to communicate with the output end of the delivery valve, which means:

The output tube is flexible, and the output end of the dispensing valve is disposed at the discharge end of the first discharge passage;

Or a third sliding contact surface between the fixed block and the movable block, and a second discharging channel is further disposed on the fixing block, the feeding end of the second discharging channel and the first discharging channel The discharge ends are all disposed at the third sliding contact surface such that the feeding end of the second discharge passage always communicates with the discharge end of the first discharge passage when the movable block moves relative to the fixed block; The output of the valve is disposed at the discharge end of the second discharge passage.

As a further improvement of the present invention, the movable block linearly reciprocates or reciprocates relative to the fixed block;

When the movable block reciprocates relative to the fixed block, the output end of the dispensing valve is disposed at the discharge end of the first discharge passage, and the output tube is connected to the output end of the delivery valve by a rotational connection, and the The axis of the rotational joint coincides with the pivot axis of the movable block.

As a further improvement of the invention, the movable block is swung in a horizontal plane or in a vertical plane with respect to the fixed block.

As a further improvement of the present invention, the feed passage on the dispensing valve is also connected to an outlet line, and the outlet line is provided with an outlet valve.

As a further improvement of the present invention, the input pipe has two or more feed ends, and each of the feed ends is provided with a valve.

As a further improvement of the invention, a flushing line is also provided which is in communication with the line in the dispensing valve and the outlet line.

As a further improvement of the invention, a flow measuring device is also provided on the dispensing valve or line.

Beneficial effect

Compared with the prior art, the invention has the following positive effects: (1) adopting a closed distribution valve mechanism to replace the traditional hopper mechanism, improving the heat preservation and moisturizing effect, avoiding leakage and sprinkling, satisfying high quality, energy saving materials, (2) The concrete in the distribution valve continuously enters and is pumped out without agitation, and there is no assembly, which reduces maintenance costs. (3) Closed pumping mode is adopted, and the input pipe is used. Connected to the output port of the mixing drum, the continuous output can be carried out by the pumping tank's own liquid level pressure and the pumping pressure of the pumping truck. The pumping flow can be controlled by the plunger pump, without having to separate the mixer truck and the pump truck. Operation, coordination and cooperation, timely and accurate feeding, is conducive to intelligent, automated and efficient construction; (4) no longer subject to open-ended hoppers, various implementation methods, both horizontal and vertical Straight arrangement, the height of the horizontal arrangement is small, and the length of the horizontal direction is short when placed vertically; (5) When the vertical arrangement is adopted, the two pump tubes can also be arranged vertically up and down It may be horizontally arranged side by side, to meet the different requirements of the discharge tube arrangement.

DRAWINGS

FIG. 1 is a schematic top plan view of the first embodiment.

2 is a schematic side view showing the structure of the first embodiment.

3 is a schematic top plan view of the second embodiment.

4 is a schematic top plan view of the third embodiment.

FIG. 5 is a schematic top plan view of the fourth embodiment.

Fig. 6 is a schematic side view showing the structure of the fourth embodiment.

Fig. 7 is a view of the fourth embodiment as seen from the rear direction.

FIG. 8 is a schematic structural view of Embodiment 5.

Fig. 9 is a view of the fifth embodiment as seen from the rear direction.

Figure 10 is a schematic view of the first sliding contact surface when the movable block is oscillated relative to the fixed block.

Figure 11 is a schematic view of the first sliding contact surface when the movable block moves linearly relative to the fixed block.

Embodiments of the invention

The technical solution of the present invention will be described in detail below with reference to the accompanying drawings:

Embodiment 1

1 and 2, a closed hopper-free concrete pumping mechanism, including a distribution valve, an input pipe 1, an output pipe 4, and two sets of plunger pumps 5;

The dispensing valve includes a fixed block 2 and a movable block 3 that is movably engaged with the fixed block 2;

The input pipe 1 has two discharge ends that are in one-to-one correspondence with the two input ends of the delivery valve;

The two pump port connection ends of the delivery valve are disposed on the fixed block 2, and are connected to and connected to the pump ports of the two sets of plunger pumps 5;

The feed end of the output pipe 4 is connected to the output end of the delivery valve;

The fixing block 2 is provided with a first inlet and outlet channel and a second inlet and outlet channel, the outer end of the first inlet and outlet channel is a first pump port connection end, and the outer end of the second inlet and outlet channel is a Two pump port connection ends;

a first discharge channel, a first inlet channel and a second inlet channel are disposed in the movable block 3; the first inlet channel is configured to communicate with a first input end of the dispensing valve, the second a feed passage for communicating with a second input end of the dispensing valve; the first discharge passage for communicating with an output of the dispensing valve;

The dispensing valve has at least a first station and a second station that move the movable block 3 relative to the fixed block 2; when the movable block 3 is in the first station, the first inlet and outlet channels are connected to the first feeding channel The second inlet and outlet channels are in communication with the first discharge channel, and the second inlet channel is closed; when the movable block 3 is in the second station, the first inlet and outlet channels are in communication with the first discharge channel. The second inlet and outlet channels are in communication with the second inlet channel, and the first inlet channel is closed.

The working cycles of the two plunger pumps 5 are the same, and the phases are opposite. When the first plunger pump 5 absorbs the concrete inward, the plunger pump 5 pushes the concrete outwards and alternately circulates the next day. When the dispensing valve is in the first station, the concrete from the input pipe 1 is sucked into the first plunger pump 5 along the first inlet passage, the first inlet and outlet passage, and the concrete in the second plunger pump 5 is along The two-inlet discharge channel and the first discharge channel reach the output end and are output from the output pipe 4. When the dispensing valve is in the second station, the concrete from the input pipe 1 is sucked into the second plunger pump 5 along the second inlet passage and the second inlet and outlet passage, while the concrete in the first plunger pump 5 is along the first An inlet and outlet channel and a first discharge channel reach the output end and are output from the output tube 4. This allows continuous pumping without the need for a hopper.

In the present embodiment, the movable block 3 reciprocates in a horizontal plane with respect to the fixed block 2, and the reciprocating swing can be realized by a hydraulic motor, a swing cylinder or other mechanism. The moving block 3 is a fan shape.

As shown in FIGS. 1 and 8, the fixed block 2 and the movable block 3 have an arc-shaped first sliding contact surface; the inner ends of the first inlet and outlet channels and the second inlet and outlet channels are disposed in the first sliding contact. a discharge end of the first feed passage, a discharge end of the second feed passage, and a feed end of the first discharge passage are also disposed at the first sliding contact surface to make the movable block 3 when the first station is in the first station, the feeding end of the first feeding channel and the feeding end of the first discharging channel are respectively in one-to-one correspondence with the inner end of the first feeding and discharging channel and the inner end of the second feeding and discharging channel, And the second feeding channel is cut off at the first sliding contact surface, and when the movable block 3 is in the second working position, the feeding end of the first discharging channel and the discharging end of the second feeding channel are respectively corresponding to the first feeding and discharging materials The inner end of the passage and the inner end of the second inlet and outlet passage are in one-to-one correspondence, and the first feed passage is closed at the first sliding contact surface.

In this embodiment, the plunger pump 5 and the input pipe 1 are both horizontally arranged. As shown in FIG. 2, the feeding end portion of the output pipe 4 is arranged vertically with the dispensing valve, and has the advantage of occupying a small space in the height direction.

In this embodiment, the fixed block 2 and the movable block 3 have a second sliding contact surface, and the second sliding contact surface refers to a contact plane between the top of the movable block 3 and the fixed block 2.

The top of the fixing block 2 is further provided with a third feeding passage and a fourth feeding passage, and the feeding end of the third feeding passage is a first input end of the dispensing valve, and the fourth feeding passage is The feeding end is the second input end of the dispensing valve, the discharging end of the third feeding channel and the discharging end of the fourth feeding channel are disposed at the second sliding contact surface, and the feeding of the first feeding channel The feed ends of the end and the second feed passage are also disposed at the second sliding contact surface so that when the movable block 3 is at the first station, the discharge end of the third feed passage and the feed of the first feed passage The discharge end of the fourth feed passage is closed at the second sliding contact surface, and the discharge end of the third feed passage is closed at the second sliding contact surface when the movable block 3 is at the second working position. The discharge end of the fourth feed passage is correspondingly connected to the feed end of the second feed passage. Thereby, the switching work of the incoming material is realized.

A third sliding contact surface is disposed between the fixing block 2 and the movable block 3, and the second discharging channel is further disposed on the fixing block 2, the feeding end of the second discharging channel and the first discharging channel The discharge ends are all disposed at the third sliding contact surface, so that the feeding end of the second discharging passage always communicates with the discharging end of the first discharging passage when the movable block 3 moves relative to the fixed block 2; The output end of the dispensing valve is disposed at the discharge end of the second discharge passage. In this embodiment, as shown in FIG. 2, the feeding end of the output pipe 4 is connected to the discharging end of the second discharging passage of the fixed block 2, the feeding end of the second discharging passage and the first discharging passage. The discharge end is located at a sliding contact between the movable block 3 and the fixed block 2, that is, the third sliding contact surface, and the feeding end of the second discharging passage and the first discharging passage The discharge ends are all located on the axis of the swing of the movable block 3, and the concrete of the first discharge passage can smoothly enter the output pipe 4 regardless of whether the movable block 3 is located at the first station or the second station, in which case the output pipe 4 Optional rigid pipe.

The output pipe 4 and the first discharge channel may have another communication mode: the output pipe 4 is flexible, the output end of the distribution valve is disposed at the discharge end of the first discharge channel, and the output pipe 4 is directly connected to the activity. On the discharge end of the first discharge channel of block 3.

The output tube 4 and the first discharge channel may have another preferred communication mode: the output end of the dispensing valve is disposed at the discharge end of the first discharge channel, and the output tube 4 is connected to the dispensing valve by a rotational connection The output ends are connected and the axis of the rotational joint coincides with the axis of oscillation of the movable block 3.

The feed passage on the distribution valve is also connected with an outlet pipe, and the outlet pipe is provided with an outlet valve. When the feed is out, the air in the pipeline can be discharged first to ensure the normal stability of the feed.

The input pipe 1 has two or more feeding ends, and each of the feeding ends is provided with a valve, and a plurality of mixing vehicles can be connected at the same time to ensure continuous supply of concrete.

There is also a flushing line communicating with the delivery valve and the pipeline in the outlet valve for flushing the concrete remaining in the pipeline.

A flow measuring device is also arranged on the dispensing valve or pipeline for monitoring the flow of concrete.

Embodiment 2

As shown in FIG. 3, the main difference between the embodiment and the first embodiment is that the input pipe 1 is flexible, the first input end of the dispensing valve is disposed at the feeding end of the first feeding channel, and the second input end of the dispensing valve It is disposed at the feed end of the second feed passage so that there is no need to open a third feed passage and a fourth feed passage on the fixed block 2. In this embodiment, the output tube 4 is still disposed below the movable block 3, preferably perpendicularly connected thereto by a rotational connection, and then turned to a horizontal forward direction by the elbow.

Embodiment 3

As shown in FIG. 4, this embodiment is a further improvement of the second embodiment: the movable block 3 is simplified into a swinging bracket, and the bracket has an arc plate, and the outer side of the circular arc plate is in sliding contact with the fixed block 2, the third input The material passage and the fourth feeding passage are all located at the outer side of the circular arc plate, and the input pipe 1 is flexible, and is directly connected to the inner side of the circular arc plate through the two discharging ends thereof, and the first discharging passage is arranged through one of the first discharging passages. This is achieved by a tortuous tube on the bracket. The solution greatly reduces the weight of the movable block 3, and exposes the input pipe 1, the output pipe 4, and the first discharge passage to facilitate replacement maintenance.

Embodiment 4

5, 6 and 7, the main difference between this embodiment and the first embodiment is that the movable block 3 is oscillated in the vertical plane, and the pump tube, the input tube 1 and the output tube 4 of the two plunger pumps 5 are both Horizontally, the plunger pump 5 is inserted from the side of the fixed block 2, and the input pipe 1 is accessed from the top of the fixed block 2, and is provided with a movable conveying pipe, and the first discharging material on the movable conveying pipe and the movable block 3 The passage is fixedly connected, the output pipe 4 is slewingly connected to the movable feed pipe, and the center of rotation of the movable feed pipe is located on the swing axis of the movable block 3. This embodiment has the advantage of occupying a small space in the horizontal direction.

In this embodiment, the first sliding contact surface is located at the front side of the movable block 3, and the second sliding contact surface is located at a circular sliding fit between the fixed block 2 and the movable block 3.

Embodiment 5

8 and 9, the main difference between this embodiment and the fourth embodiment is that the input pipe 1 is flexible, the first input end of the dispensing valve is disposed at the feeding end of the first feeding channel, and the second of the dispensing valve. The input end is arranged at the feed end of the second feed channel, so that there is no need to open a third feed channel and a fourth feed channel on the fixed block 2, and the input pipe 1 can be directly accessed from the side of the movable block 3.

Obviously, when the movable block 3 is moved linearly with respect to the fixed block 2 as shown in FIG. 11, only the shape and size of the fixed block 2 and the movable block 3 are adjusted correspondingly on the basis of FIG. A communication switching relationship between a sliding contact surface and a second sliding contact surface. For the realization that the third sliding contact surface is always connected, the size of one side hole end can be enlarged in the moving direction, thereby ensuring that the pipelines on both sides are always connected when the movable block 3 moves. The linear reciprocating motion between the two can be driven by a cylinder, a cylinder, a hydraulic motor or other device.

Other embodiments may be modified by the cross-combination of the implementation means in the above embodiments, and all of them should be within the protection scope of the patent. The specific scheme will not be described here.

Claims

A closed concrete pumping mechanism without hopper, comprising an input pipe (1), an output pipe (4) and two sets of plunger pumps (5), characterized in that: a distribution valve is further included;

The dispensing valve includes a fixed block (2) and a movable block (3) that is movably engaged with the fixed block (2);

The dispensing valve has a first pump port connection end, a second pump port connection end, a first input end, a second input end, and an output end;

The input pipe (1) has two discharge ends that are in one-to-one correspondence with the two input ends of the delivery valve;

The two pump port connection ends of the delivery valve are arranged on the fixed block (2), and are connected to and connected with the pump ports of the two sets of plunger pumps (5);

The feed end of the output pipe (4) is connected to the output end of the delivery valve;

The fixing block (2) is provided with a first inlet and outlet channel and a second inlet and outlet channel, the outer end of the first inlet and outlet channel is a first pump port connection end, and the outer end of the second inlet and outlet channel That is, the second pump port connection end;

a first discharge channel, a first feed channel and a second feed channel are disposed in the movable block (3); the first feed channel is configured to communicate with a first input end of the dispensing valve, a second feed passage for communicating with a second input end of the dispensing valve; the first discharge passage for communicating with an output of the dispensing valve;

The dispensing valve has at least a first station and a second station that move the movable block (3) relative to the fixed block (2); when the movable block (3) is in the first station, the first inlet and outlet channels are The first feed channel is in communication, the second inlet and outlet channels are in communication with the first discharge channel, and the second feed channel is closed; when the movable block (3) is in the second station, the first inlet and outlet channels are The first discharge passage is in communication, the second inlet and outlet passages are in communication with the second feed passage, and the first feed passage is closed.
The enclosed hopper-free concrete pumping mechanism according to claim 1, wherein the fixed block (2) and the movable block (3) have a first sliding contact surface;

The inner ends of the first inlet and outlet channels and the second inlet and outlet channels are disposed at a first sliding contact surface, the discharge end of the first inlet channel, the discharge end of the second inlet channel, and the first outlet The feed end of the material passage is also disposed at the first sliding contact surface so that when the movable block (3) is at the first station, the discharge end of the first feed passage and the feed end of the first discharge passage One-to-one correspondence with the inner end of the first inlet and outlet channel and the inner end of the second inlet and outlet channel, respectively, and the second feeding channel is cut off at the first sliding contact surface, and the movable block (3) is in the second station The feeding end of the first discharging channel and the discharging end of the second feeding channel are respectively in communication with the inner end of the first feeding and discharging channel and the inner end of the second feeding and discharging channel, and the first feeding channel It is cut off at the first sliding contact surface.
A closed hopper-free concrete pumping mechanism according to claim 1 wherein: said first feed passage is for communicating with a first input end of the dispensing valve, and wherein said second feed passage is for Connected to the second input of the dispensing valve means:

The input pipe (1) is flexible, the first input end of the dispensing valve is disposed at the feeding end of the first feeding channel, and the second input end of the dispensing valve is disposed at the feeding end of the second feeding channel;

Or a second sliding contact surface between the fixed block (2) and the movable block (3), the fixed block (2) further comprising a third feeding channel and a fourth feeding channel, wherein the The feed end of the three feed passage is the first input end of the dispensing valve, the feed end of the fourth feed passage is the second input end of the dispensing valve, and the discharge end of the third feed passage and the first The discharge end of the four feed passages is disposed at the second sliding contact surface, and the feed end of the first feed passage and the feed end of the second feed passage are also disposed at the second sliding contact surface to make the movable block (3) When in the first station, the discharge end of the third feed passage is correspondingly connected to the feed end of the first feed passage, and the discharge end of the fourth feed passage is closed at the second sliding contact surface. When the movable block (3) is in the second station, the discharge end of the third feed passage is closed at the second sliding contact surface, and the discharge end of the fourth feed passage corresponds to the feed end of the second feed passage. Connected.
The enclosed hopper-free concrete pumping mechanism according to claim 1, wherein the first discharge passage is connected to the output end of the delivery valve, which means:

The output tube (4) is flexible, and the output end of the dispensing valve is disposed at the discharge end of the first discharge passage;

Or a third sliding contact surface between the fixing block (2) and the movable block (3), and a second discharging channel is further disposed on the fixing block (2), and the second discharging channel is further advanced. The material end and the discharge end of the first discharge channel are both disposed at the third sliding contact surface so that the feeding end of the second discharge channel is always moved when the movable block (3) moves relative to the fixed block (2) And communicating with the discharge end of the first discharge passage; the output end of the distribution valve is disposed at the discharge end of the second discharge passage.
The enclosed hopper-free concrete pumping mechanism according to claim 1, wherein the movable block (3) linearly reciprocates or reciprocates relative to the fixed block (2);

When the movable block (3) reciprocates relative to the fixed block (2), the output end of the dispensing valve is disposed at the discharge end of the first discharge passage, and the output pipe (4) is connected and distributed by rotation The output ends of the valves are connected and the axis of the rotational joint coincides with the pivot axis of the movable block (3).
A closed hopper-free concrete pumping mechanism according to claim 5, characterized in that the movable block (3) is swung in a horizontal plane or in a vertical plane with respect to the fixed block (2).
The closed hopper-free concrete pumping mechanism according to any one of claims 1 to 6, wherein the feed passage on the distribution valve is further connected with an air outlet pipe, and the air outlet pipe is provided with air outlet. valve.
The closed type hopper-free concrete pumping mechanism according to any one of claims 1 to 6, wherein the input pipe (1) has two or more feeding ends, and each feeding end is respectively provided with valve.
A closed hopper-free concrete pumping mechanism according to any one of claims 1 to 6, further comprising a flushing line in communication with the line in the dispensing valve.
The enclosed hopper-free concrete pumping mechanism according to any one of claims 1 to 6, characterized in that the distribution valve or the pipeline is further provided with a flow measuring device.