A double suction device for a pumping system

Abstract

The present invention belongs to the technical field of concrete pumping, and specifically is a double-suction device of a pumping system, comprising a pumping component, which is installed on a hopper and is used to suck and pump concrete in the hopper; a conveying switching component, which is connected to the pumping component and is used to convey concrete extracted by the pumping component; a driving component, which is used to drive a cutting plate to make a reciprocating motion on a glasses plate; and a compensation component, which is installed on a conveying pipe and is used to adjust the concrete pressure in the conveying pipe. The present invention maintains the stability of the concrete pressure in the conveying pipe and the confluence pipe during concrete pumping through an active compensation cavity and a passive compensation pipe, thereby reducing the fluctuation intensity of concrete pumping and enhancing the effect of concrete pumping injection.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete pumping, in particular to a double-suction device for a pumping system. Background Art

[0002] When concrete is pumping, the suction performance of the pumping system directly affects the continuity of pumping. During the spraying operation of the wet spraying trolley, the continuity of pumping directly affects the amount of rebound. Therefore, the quality of the pumping system is crucial to the effects of concrete wet spraying and other processes.

[0003] At present, concrete pumps have been widely used in concrete engineering construction. In the long-term use process, the popularity of hydraulic double-cylinder piston concrete pumps is relatively high. When the hydraulic double-cylinder piston concrete pump is working, the two piston pumps work alternately to continuously pump concrete into the delivery pipeline, so that the delivery of concrete is relatively stable and continuous. However, during the long-term use process, it was found that since the hydraulic double-cylinder piston concrete pump needs to switch back and forth between the delivery pipeline and the two piston pump cylinders when in use, during the switching process, the concrete stops being pumped into the delivery pipeline, resulting in the concrete delivery process. The phenomenon of flow interruption. At the same time, since the efficiency of the piston cylinder in extracting concrete is usually only 85-95%, it is inevitable to inhale a section of air during the suction process, and when the piston reverses, the pressure exerted on the concrete gradually increases, which will cause a certain compression of the concrete. Under the joint action of these factors, the hydraulic double-cylinder piston concrete pump will have a more obvious flow interruption phenomenon. The occurrence of flow interruption phenomenon is not only easy to cause concrete segregation, and part of the concrete will be dehydrated into dry and hard concrete, causing pipe blockage, but also easy to impact the concrete pump hydraulic system, causing damage to some parts and increasing energy loss, which is not conducive to the long-term pumping operation of concrete.

[0004] In order to prevent the flow interruption during the concrete delivery process, the related technology uses a four-piston concrete pump to deliver concrete by adding piston cylinders. During the concrete pumping process, the switching time of the two groups of piston cylinders is staggered. Then, when a flow interruption occurs during the delivery process of one of the piston cylinders, the stable output of the other piston cylinder is used to compensate for it, thereby maintaining uninterrupted delivery of concrete in the delivery pipeline. However, in actual application, although the two groups of piston cylinders complement each other, so that there will be no flow interruption of concrete, it is found in the entire concrete delivery process that when both groups of piston cylinders are outputting stably, the pressure in the concrete delivery pipeline is relatively high and the concrete spraying intensity is high. When one group of piston cylinders is switched, the pressure in the concrete delivery pipeline is reduced and the concrete spraying intensity is reduced, resulting in unstable concrete spraying and affecting the concrete wet spraying effect.

[0005] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art known to those skilled in the art.

[0006] In view of this, the present invention proposes a double suction device for a pumping system to solve the above technical problems. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the present invention proposes a double suction device for a pumping system.

[0008] The technical solution adopted by the present invention to solve its technical problem is: the present invention maintains the stability of concrete pressure in the delivery pipe and the confluence pipe during concrete pumping through an active compensation chamber and a passive compensation pipe, thereby reducing the fluctuation intensity of concrete pumping and enhancing the effect of concrete pumping injection.

[0009] A double suction device of a pumping system according to the present invention comprises a pumping assembly, wherein the pumping assembly is installed on a hopper and is used for sucking and pumping concrete in the hopper;

[0010] The pumping assembly includes a main oil cylinder, a water tank and a concrete cylinder, one end of the concrete cylinder is fixedly connected to the water tank, and the other end is conductively connected to the hopper;

[0011] A piston, wherein the piston is slidably connected in the concrete cylinder, and the main oil cylinder is connected to the piston to drive the piston to move back and forth in the concrete cylinder;

[0012] It also includes a delivery switching assembly, which is connected to the pumping assembly and is used to deliver concrete extracted by the pumping assembly;

[0013] The conveying switching assembly includes a conveying pipe and a confluence pipe, the confluence pipe is Y-shaped, there are two conveying pipes, both of which are conductively connected to the confluence pipe, one end of the confluence pipe penetrates the inner wall of the hopper, and the confluence pipe is rotatably connected to the hopper;

[0014] Eyeglass plate and cutting plate, the delivery pipe is fixedly installed with a cutting plate at one end away from the confluence pipe, the eyeglass plate is symmetrically installed on the inner wall of the hopper, the eyeglass plate is conductively connected with the concrete cylinder, the cutting plate is slidably connected to the eyeglass plate, and the eyeglass plate and the cutting plate are used to switch the conductive state between the delivery pipe and the concrete cylinder;

[0015] A driving assembly, the driving assembly is used to drive the cutting plate to make a reciprocating motion on the eyeglass plate;

[0016] A compensation component is installed on the conveying pipe and is used to adjust the concrete pressure in the conveying pipe.

[0017] Preferably, the driving assembly includes a rocker arm, a connecting block is fixedly mounted on the conveying pipe, a rotating shaft is fixedly mounted on the connecting block at one end away from the conveying pipe, the conveying pipe is coaxially designed with the confluence pipe, the rotating shaft passes through the hopper and is rotatably connected to the hopper, and the rotating shaft is located outside the hopper and is fixedly connected to a rocker arm;

[0018] Swinging cylinder: the outer wall of the hopper is fixedly connected with a symmetrically designed mounting seat, a swinging cylinder is installed between the mounting seat and the rocker arm, and the swinging cylinder, the mounting seat and the rocker arm are all ball-hingedly connected.

[0019] Preferably, the delivery pipe and the confluence pipe are both made of rigid materials.

[0020] Preferably, the cutting plate is designed to be arc-shaped, a conducting groove is opened on the cutting plate, and the conducting groove runs through the cutting plate, and the glasses plate and the cutting plate are both designed to be symmetrical.

[0021] Preferably, the compensation component comprises a passive compensation tube, the passive compensation tube is fixedly mounted on the cutting plate, and the passive compensation tube is designed to be in conduction with the conduction groove;

[0022] Elastic membrane: the passive compensation tube is fixedly connected with an elastic membrane on one side close to the conducting groove, and the elastic membrane is made of corrosion-resistant elastic material.

[0023] Preferably, the diameter of the passive compensation tube at one end close to the cutting plate is larger than the diameter of the end away from the cutting plate.

[0024] Preferably, a support spring is fixedly connected inside the passive compensation tube, and the support spring is used to elastically support the elastic membrane.

[0025] Preferably, the compensation component further comprises an active compensation cavity, and the active compensation cavity is opened inside the connecting block;

[0026] A suction groove and an input groove, both of which are arranged on the connection block, and the input groove extends into the conveying pipe, and both of which are unidirectional conductive grooves;

[0027] The offset plate is slidably connected in the active compensation cavity, an arc groove is provided on the connection block, the arc groove passes through the active compensation cavity, the offset plate extends to the outside through the arc groove, and the offset plate is fixedly connected to the inner wall of the hopper.

[0028] Preferably, sealing rings are installed at the connection between the hopper, the concrete cylinder and the hopper.

[0029] The beneficial effects of the present invention are as follows:

[0030] 1. The double suction device of a pumping system described in the present invention, by setting a compensation component and a delivery switching component, in the process of pumping concrete, by setting multiple concrete cylinders, using a delivery pipe and a converging pipe to converge the concrete flow, thereby effectively enhancing the concrete pumping efficiency. At the same time, the setting of the compensation component can compensate for the concrete pressure in the delivery pipe. Whenever the pressure in the delivery pipe decreases, the compensation component replenishes concrete into the delivery pipe, which, on the one hand, reduces the probability of concrete flow interruption in the delivery pipe, and on the other hand, maintains the stability of concrete pumping, and reduces the negative impact on concrete delivery when the delivery pipe and the concrete cylinder are switched.

[0031] 2. The double suction device of the pumping system described in the present invention maintains the stability of the concrete pressure in the delivery pipe and the confluence pipe during concrete pumping through an active compensation chamber and a passive compensation pipe, thereby reducing the fluctuation intensity of concrete pumping and enhancing the effect of concrete pumping injection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be further described below in conjunction with the accompanying drawings.

[0033] Figure 1 is a top view of the present invention;

[0034] Figure 2 is a partial cross-sectional view of the present invention;

[0035] Figure 3 yes Figure 2 Partial cross-sectional view at AA in the middle;

[0036] Figure 4 yes Figure 2 Partial cross-sectional view at the middle BB;

[0037] Figure 5 It is a partial structural diagram of the present invention;

[0038] Figure 6 is a cross-sectional view of the passive compensation tube;

[0039] Figure 7 is a cross-sectional view of the active compensation cavity;

[0040] In the figure: 1. hopper; 11. main oil cylinder; 12. water tank; 13. concrete cylinder; 14. piston; 2. delivery pipe; 21. confluence pipe; 22. eyeglass plate; 23. cutting plate; 24. rocker arm; 25. connecting block; 26. rotating shaft; 27. swing oil cylinder; 28. mounting seat; 29. ​​conduction groove; 3. passive compensation pipe; 31. elastic membrane; 32. support spring; 4. active compensation chamber; 41. suction groove; 42. input groove; 43. offset plate; 44. arc groove. DETAILED DESCRIPTION

[0041] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0042] like Figures 1 to 7 As shown, a double suction device of a pumping system according to the present invention comprises a pumping assembly, wherein the pumping assembly is installed on a hopper 1, and the pumping assembly is used for sucking and pumping concrete in the hopper 1;

[0043] The pumping assembly includes a main oil cylinder 11, a water tank 12 and a concrete cylinder 13, one end of the concrete cylinder 13 is fixedly connected to the water tank 12, and the other end is conductively connected to the hopper 1;

[0044] A piston 14, wherein the piston 14 is slidably connected in the concrete cylinder 13, and the main oil cylinder 11 is connected to the piston 14, and is used to drive the piston 14 to move back and forth in the concrete cylinder 13;

[0045] It also includes a delivery switching assembly, which is connected to the pumping assembly and is used to deliver concrete extracted by the pumping assembly;

[0046] The conveying switching assembly includes a conveying pipe 2 and a confluence pipe 21. The confluence pipe 21 is Y-shaped. There are two conveying pipes 2, and both are conductively connected to the confluence pipe 21. One end of the confluence pipe 21 penetrates the inner wall of the hopper 1. The confluence pipe 21 is rotatably connected to the hopper 1.

[0047] The eyeglass plate 22 and the cutting plate 23, the cutting plate 23 is fixedly installed at one end of the conveying pipe 2 away from the confluence pipe 21, the eyeglass plate 22 is symmetrically installed on the inner wall of the hopper 1, the eyeglass plate 22 is conductively connected with the concrete cylinder 13, the cutting plate 23 is slidably connected to the eyeglass plate 22, and the eyeglass plate 22 and the cutting plate 23 are used to switch the conductive state between the conveying pipe 2 and the concrete cylinder 13;

[0048] A driving assembly, the driving assembly is used to drive the cutting plate 23 to make a reciprocating motion on the eyeglass plate 22;

[0049] A compensation component, the compensation component is installed on the delivery pipe 2, and the compensation component is used to adjust the concrete pressure in the delivery pipe 2;

[0050] In the process of sucking and pumping concrete, in order to enhance the uninterrupted pumping of concrete and reduce the fluctuation of the concrete delivery pressure, the mixed concrete is poured into the hopper 1 during operation. Under the action of gravity, the concrete flows to the bottom of the hopper 1. At this time, the pumping assembly is started. When the pumping assembly is working, the concrete in the hopper 1 is continuously extracted and squeezed and transported. Specifically, when the main oil cylinder 11 is working, the piston 14 is pushed to move back and forth in the concrete cylinder 13, thereby causing the pressure in the four concrete cylinders 13 to change periodically. When the piston 14 moves from the direction of the hopper 1 toward the direction of the main oil cylinder 11, the pressure in the concrete cylinder 13 is reduced, causing the concrete to enter the concrete cylinder 13 under the action of gravity and negative pressure. Then, when the movement direction of the piston 14 is switched, the concrete in the concrete cylinder 13 is pressurized and discharged outward under the push of the piston 14. At the same time, during the movement of the piston 14, the driving assembly works to push the cutting plate 23 to move back and forth in the eyeglass plate 22. Due to the present invention, The eyeglass plate 22 and the cutting plate 23 are both plural in design, and the concrete cylinder 13 corresponds to the openings on the eyeglass plate 22 one by one. Therefore, when the cutting plate 23 moves on the eyeglass plate 22, the position of the delivery pipe 2 on the eyeglass plate 22 will change, thereby causing the conductive relationship between the delivery pipe 2 and the concrete cylinder 13 to switch. Therefore, when the concrete cylinder 13 extracts concrete, the delivery pipe 2 and the concrete cylinder 13 are misaligned under the push of the driving component, and when the concrete cylinder 13 discharges concrete, the delivery pipe 2 and the concrete cylinder 13 are connected under the push of the driving component, thereby effectively pressurizing the concrete in the hopper 1 and delivering it to the delivery pipe 2, and under the guidance of the delivery pipe 2, it is gathered in the confluence pipe 21 and transported to the outside. In this process, whenever the driving component pushes the cutting plate 23 to move, the compensation component will perform pressure compensation during the pressure change in the delivery pipe 2, thereby reducing the amplitude of the concrete pressure change in the delivery pipe 2, thereby reducing the amplitude of the strength fluctuation of the concrete sprayed in the confluence pipe 21, and enhancing the stability of concrete pumping.

[0051] In the present invention, by setting a compensation component and a delivery switching component, during the concrete pumping process, multiple concrete cylinders 13 are set, and the concrete flow is converged by using the delivery pipe 2 and the confluence pipe 21, thereby effectively enhancing the concrete pumping efficiency. At the same time, the setting of the compensation component can compensate for the concrete pressure in the delivery pipe 2. Whenever the pressure in the delivery pipe 2 decreases, the compensation component replenishes concrete into the delivery pipe 2. On the one hand, the probability of concrete flow interruption in the delivery pipe 2 is reduced, and on the other hand, the stability of concrete pumping is maintained, and the negative impact on concrete delivery when the delivery pipe 2 and the concrete cylinder 13 are switched is reduced.

[0052] As a preferred embodiment of the present invention, the driving assembly includes a rocker arm 24, a connecting block 25 is fixedly installed on the conveying pipe 2, a rotating shaft 26 is fixedly installed on one end of the connecting block 25 away from the conveying pipe 2, the conveying pipe 2 is coaxially designed with the confluence pipe 21, the rotating shaft 26 penetrates the hopper 1 and is rotatably connected to the hopper 1, and the rotating shaft 26 is located outside the hopper 1 and is fixedly connected to the rocker arm 24;

[0053] Swinging cylinder 27, the outer wall of the hopper 1 is fixedly connected with a symmetrically designed mounting seat 28, a swinging cylinder 27 is installed between the mounting seat 28 and the rocker arm 24, and the swinging cylinder 27, the mounting seat 28 and the rocker arm 24 are all connected by ball hinges;

[0054] When switching the docking relationship between the delivery pipe 2 and the concrete cylinder 13, one of the two swing cylinders 27 installed on the mounting seat 28 extends and the other contracts, thereby pushing the rocker arm 24 to rotate axially around the rotating shaft 26. Since the rocker arm 24 is fixedly connected to the rotating shaft 26, the rotation of the rocker arm 24 drives the rotating shaft 26, the connecting block 25 and the delivery pipe 2 to rotate synchronously, thereby realizing the switching of the docking relationship between the delivery pipe 2 and the concrete cylinder 13. During long-term concrete pumping work, due to the drive of the swing cylinder 27, the delivery pipe 2 and the connecting block 25 perform periodic reciprocating motion in the hopper 1, and then utilize the swing effect to form a stirring effect on the concrete in the hopper 1, on the one hand, enhancing the effect of the concrete flowing downward, enhancing the effect of the concrete cylinder 13 extracting concrete by negative pressure, and reducing the void rate in the concrete extracted by the concrete cylinder 13. On the other hand, stirring can effectively reduce the probability of concrete segregation, condensation and other phenomena, and enhance the concrete pumping effect.

[0055] As a preferred embodiment of the present invention, the delivery pipe 2 and the confluence pipe 21 are both made of rigid materials;

[0056] By using rigid materials to prepare the conveying pipe 2 and the converging pipe 21, on the one hand, the service life of the conveying pipe 2 and the converging pipe 21 is increased and the probability of damage to the conveying pipe 2 and the converging pipe 21 is reduced. On the other hand, the rigid characteristics are utilized to enhance the movement effect of the conveying pipe 2 and the converging pipe 21, so that the conveying pipe 2 and the converging pipe 21 are swinging, thereby enhancing the mixing effect of the concrete.

[0057] As a preferred embodiment of the present invention, the cutting plate 23 is designed in an arc shape, and a conducting groove 29 is opened on the cutting plate 23, and the conducting groove 29 runs through the cutting plate 23, and the eyeglass plate 22 and the cutting plate 23 are symmetrically designed;

[0058] A conducting groove 29 is provided on the cutting plate 23, and the eyeglass plate 22 and the cutting plate 23 are symmetrically designed. Because the conveying pipe 2 and the cutting plate 23 move in the same direction under the driving action of the rotating shaft 26, when the cutting plate 23 is symmetrically designed, the connection positions of the conveying pipe 2 and the cutting plate 23 are opposite. When the two conveying pipes 2 and the cutting plate 23 move synchronously, the switching effect is different. Specifically, the eyeglass plate 22 is divided into four sections, and the cutting plate 23 occupies half of the length of the eyeglass plate 22. When the two conveying pipes 2 are respectively connected to the concrete cylinder 13, the conveying pipe 2 then drives the cutting plate 23 to move. When the movement distance reaches When it reaches one quarter, the conveying pipe 2 and the concrete cylinder 13 are both misaligned. At this time, the conveying pipe 2 on which the cutting plate 23 is located in the moving direction of the conveying pipe 2 is connected to the other concrete cylinder 13 through the conducting groove 29, while the conveying pipe 2 on which the cutting plate 23 is located away from the moving direction is still connected to the previous concrete cylinder 13 through the conducting groove 29. Therefore, during the swinging movement, the switching of the docking relationship between the two conveying pipes 2 and the concrete cylinder 13 is not carried out at the same time. Therefore, during the switching process, one of the two conveying pipes 2 is always continuously conveying materials, thereby reducing the probability of concrete pumping interruption.

[0059] As a preferred embodiment of the present invention, the compensation component includes a passive compensation tube 3, the passive compensation tube 3 is fixedly mounted on the cutting plate 23, and the passive compensation tube 3 is designed to be in conduction with the conduction groove 29;

[0060] An elastic membrane 31, the passive compensation tube 3 is fixedly connected to a side close to the conducting groove 29 with the elastic membrane 31, and the elastic membrane 31 is made of a corrosion-resistant elastic material;

[0061] When concrete is normally transported, under the action of the pressure of concrete transportation, part of the concrete compresses the elastic membrane 31, causing the elastic membrane 31 to deform toward the passive compensation tube 3, and then a certain amount of concrete is stored in the passive compensation tube 3. During the switching process, the concrete in one of the delivery pipes 2 is in a cut-off state. At this time, the pressure in the cut-off delivery pipe 2 is reduced. Therefore, under the elastic reset action of the elastic membrane 31 itself, the elastic membrane 31 pushes the concrete in the passive compensation tube 3 to flow into the guide groove 29 and the delivery pipe 2. Since the interval between the movement and switching of the cutting plate 23 is short, the flow of concrete in the delivery pipe 2 can be maintained during the interval between the movement and switching of the cutting plate 23.

[0062] As a preferred embodiment of the present invention, the diameter of the passive compensation tube 3 at one end close to the cutting plate 23 is larger than the diameter of the end away from the cutting plate 23.

[0063] By adjusting the diameter of the passive compensation tube 3, the opening of the passive compensation tube 3 close to the conducting groove 29 is made larger. On the one hand, the convenience of concrete moving into the passive compensation tube 3 can be effectively enhanced, and on the other hand, the convenience of concrete discharge can also be enhanced.

[0064] As a preferred embodiment of the present invention, a support spring 32 is fixedly connected inside the passive compensation tube 3, and the support spring 32 is used to elastically support the elastic membrane 31;

[0065] By setting a support spring 32 in the passive compensation tube 3, the support spring 32 is used to enhance the elastic characteristics of the elastic membrane 31. Therefore, when the concrete pressure in the conveying pipe 2 is reduced, the elastic deformation of the support spring 32 and the elastic membrane 31 can be utilized to enhance the effect of maintaining the pressure in the conveying pipe 2.

[0066] As a preferred embodiment of the present invention, the compensation component further includes an active compensation cavity 4, and the active compensation cavity 4 is opened inside the connecting block 25;

[0067] A suction groove 41 and an input groove 42, both of which are provided on the connection block 25, and the input groove 42 extends into the delivery pipe 2, and both of which are unidirectional conductive grooves 29;

[0068] An offset plate 43, wherein the offset plate 43 is slidably connected in the active compensation chamber 4, an arc groove 44 is formed on the connection block 25, the arc groove 44 penetrates the active compensation chamber 4, the offset plate 43 extends to the outside through the arc groove 44, and the offset plate 43 is fixedly connected to the inner wall of the hopper 1;

[0069] When the cutting plate 23 swings and switches the connection relationship between the delivery pipe 2 and the concrete cylinder 13, the connecting block 25 moves synchronously with the delivery pipe 2, thereby causing relative movement between the connecting block 25 and the hopper 1. Since the offset plate 43 is fixedly connected to the hopper 1, a relative displacement occurs between the active compensation chamber 4 opened inside the connecting block 25 and the offset plate 43. Under the action of the relative displacement, the concrete on one side of the active compensation chamber 4 is squeezed, thereby prompting the concrete to be input into the delivery pipe 2 through the input groove 42, increasing the concrete flow rate and pressure in the delivery pipe 2, thereby reducing the confluence. The degree of concrete pressure fluctuation in the pipe 21, and at the same time, the other side of the active compensation pipe extracts the concrete in the hopper 1 through the suction groove 41 to prepare for the output of concrete at the next switch. It should be noted that the opening area of ​​the arc groove 44 is small, so the efficiency of concrete entering and exiting through the arc groove 44 is low, and the impact on the concrete compensation of the conveying pipe 2 is small. At the same time, due to the high switching frequency of the docking relationship between the conveying pipe 2 and the concrete cylinder 13, the concrete stored in the passive compensation pipe 3 and the active compensation cavity 4 is replaced frequently, which will not cause the concrete to condense in the passive compensation pipe 3 and the active compensation cavity 4.

[0070] As a preferred embodiment of the present invention, the connection between the confluence pipe 21, the concrete cylinder 13 and the hopper 1 is equipped with a sealing ring;

[0071] The connection between the confluence pipe 21, the concrete cylinder 13 and the hopper 1 is sealed with a sealing ring to prevent the concrete in the hopper 1 from leaking out.

[0072] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A double suction device of a pumping system, comprising a pumping assembly, the pumping assembly being mounted on a hopper (1), the pumping assembly being used to suck and pump concrete in the hopper (1); the pumping assembly comprising a main oil cylinder (11), a water tank (12) and a concrete cylinder (13), one end of the concrete cylinder (13) being fixedly connected to the water tank (12) and the other end being conductively connected to the hopper (1); a piston (14), the piston (14) being slidably connected in the concrete cylinder (13), the main oil cylinder (11) being connected to the piston (14) and being used to drive the piston (14) to reciprocate in the concrete cylinder (13); characterized in that: The utility model also comprises a conveying switching component, wherein the conveying switching component is connected to the pumping component and is used for conveying concrete extracted by the pumping component; the conveying switching component comprises a conveying pipe (2) and a confluence pipe (21), wherein the confluence pipe (21) is designed in a Y shape, the conveying pipe (2) is two in number, and both are conductively connected to the confluence pipe (21), one end of the confluence pipe (21) passes through the inner wall of the hopper (1), and the confluence pipe (21) is rotatably connected to the hopper (1); an eyeglass plate (22) and a cutting plate (23), wherein the end of the conveying pipe (2) away from the confluence pipe (21) is fixedly installed with a cutting plate A plate (23), wherein the eyeglass plate (22) is symmetrically mounted on the inner wall of the hopper (1), wherein the eyeglass plate (22) is conductively connected to the concrete cylinder (13), wherein the cutting plate (23) is slidably connected to the eyeglass plate (22), wherein the eyeglass plate (22) and the cutting plate (23) are used to switch the conductive state between the conveying pipe (2) and the concrete cylinder (13); a driving component, wherein the driving component is used to drive the cutting plate (23) to perform a reciprocating motion on the eyeglass plate (22); and a compensating component, wherein the compensating component is mounted on the conveying pipe (2), wherein the compensating component is used to adjust the concrete pressure in the conveying pipe (2); The driving assembly comprises a rocker arm (24), a connecting block (25) fixedly mounted on the conveying pipe (2), a rotating shaft (26) fixedly mounted on one end of the connecting block (25) away from the conveying pipe (2), the conveying pipe (2) and the confluence pipe (21) are coaxially designed, the rotating shaft (26) penetrates the hopper (1) and is rotatably connected to the hopper (1), and the rotating shaft (26) is located outside the hopper (1) and is fixedly connected to the rocker arm (24); a swing cylinder (27), a symmetrically designed mounting seat (28) fixedly connected to the outer wall of the hopper (1), a swing cylinder (27) mounted between the mounting seat (28) and the rocker arm (24), and the swing cylinder (27) is spherically hingedly connected to the mounting seat (28) and the rocker arm (24); The compensation component comprises a passive compensation tube (3), the passive compensation tube (3) is fixedly mounted on the cutting plate (23), and the passive compensation tube (3) is designed to be in conduction with the conduction groove (29); An elastic membrane (31), wherein the passive compensation tube (3) is fixedly connected to a side close to the conducting groove (29) with the elastic membrane (31), and the elastic membrane (31) is made of a corrosion-resistant elastic material; The compensation component further comprises an active compensation cavity (4), wherein the active compensation cavity (4) is arranged inside the connection block (25); A suction groove (41) and an input groove (42), wherein the suction groove (41) and the input groove (42) are both provided on the connection block (25), the input groove (42) extends into the conveying pipe (2), and the suction groove (41) and the input groove (42) are both unidirectional conductive grooves (29); An offset plate (43) is slidably connected in the active compensation chamber (4), an arc groove (44) is provided on the connection block (25), the arc groove (44) penetrates the active compensation chamber (4), the offset plate (43) extends to the outside through the arc groove (44), and the offset plate (43) is fixedly connected to the inner wall of the hopper (1).

2. According to the double suction device of a pumping system as described in claim 1, the delivery pipe (2) and the confluence pipe (21) are both made of rigid materials.

3. According to the double suction device of a pumping system as described in claim 2, the cutting plate (23) is designed to be arc-shaped, and a conducting groove (29) is opened on the cutting plate (23), and the conducting groove (29) runs through the cutting plate (23), and the eyeglass plate (22) and the cutting plate (23) are both designed to be symmetrical.

4. According to the double suction device of a pumping system as described in claim 3, the diameter of the passive compensation tube (3) at one end close to the cutting plate (23) is larger than the diameter of the end away from the cutting plate (23).

5. According to the double suction device of a pumping system as described in claim 4, a support spring (32) is fixedly connected inside the passive compensation tube (3), and the support spring (32) is used to elastically support the elastic membrane (31).

6. According to the double suction device of the pumping system as described in claim 5, sealing rings are installed at the connection between the hopper (1), the concrete cylinder (13) and the hopper (1).

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