CN216866986U

CN216866986U - Concrete piston, concrete piston assembly, pumping system and operation machine

Info

Publication number: CN216866986U
Application number: CN202220137682.0U
Authority: CN
Inventors: 傅佳艺; 晁辉; 贡太敏
Original assignee: Sany Automobile Manufacturing Co Ltd
Current assignee: Sany Automobile Manufacturing Co Ltd
Priority date: 2022-01-18
Filing date: 2022-01-18
Publication date: 2022-07-01
Anticipated expiration: 2032-01-18

Abstract

The utility model relates to the technical field of pumping equipment, and provides a concrete piston, a concrete piston assembly, a pumping system and an operating machine. The concrete piston utilizes the base body as a structural support of the concrete piston and the rubber cup as a sealing element, and utilizes the enhancement layer to be in frictional contact with the rubber cup on the premise of ensuring the sealing performance, so that the tear resistance and the wear resistance of the lip opening of the rubber cup are improved, the friction loss of the concrete piston is reduced, and the service life of the concrete piston is prolonged.

Description

Concrete piston, concrete piston assembly, pumping system and operation machine

Technical Field

The utility model relates to the technical field of pumping equipment, in particular to a concrete piston, a concrete piston assembly, a pumping system and an operating machine.

Background

The concrete piston is one of key parts in a pumping system and is used for transmitting pressure and sealing mortar to realize pumping of concrete. The concrete piston has poor working condition and complex stress. The conveying pressure of a pump truck is 8-13MPa, the conveying pressure of a vehicle-mounted pump is 20-30MPa, and the conveying pressure of a towing pump is 6-50 MPa. With the increase of the pumping distance and the pumping height, the conveying pressure is increased, the use working condition of the concrete piston is worse, the stress is more complex, and the material performance of the concrete piston is tested.

The existing concrete piston is usually made of a polyurethane elastomer, rubber and rubber fiber composite material, and the normal service life of the existing concrete piston is that the rubber fiber composite material is larger than the rubber and larger than the polyurethane elastomer. The problems of lower tear resistance and abrasion resistance of the lip are solved, and the service life of the rubber is shorter. When the conveying pressure is more than 25MPa, the using amount of the existing piston is less than or equal to 10000, the failure rate of high-pressure pumping equipment is high, and the use cost of a client is increased.

SUMMERY OF THE UTILITY MODEL

The utility model provides a concrete piston, a concrete piston assembly, a pumping system and an operating machine, which are used for solving the problem of short service life of the concrete piston in the prior art.

The utility model provides a concrete piston which comprises a base body, a rubber cup and a reinforcing layer, wherein the rubber cup is fixedly connected to one axial end face of the base body, and the reinforcing layer is arranged on the peripheral side faces of the rubber cup and the base body.

According to the concrete piston provided by the utility model, a lip is arranged at one end, away from the base body, of the rubber cup, and a protrusion extending towards the lip is convexly arranged on the end face of the base body.

According to the concrete piston provided by the utility model, the base body is provided with a first end face and a second end face which are arranged in an opposite mode, the rubber cup is fixedly connected to the first end face, and the reinforcing layer extends to the second end face and is attached to at least one part of the second end face.

According to the concrete piston provided by the utility model, the second end face is provided with the stepped groove, the bottom surface of the stepped groove is connected with the peripheral side face of the base body, the reinforcing layer is attached to the bottom of the stepped groove, and the thickness of the reinforcing layer positioned in the stepped groove is larger than or equal to the depth of the stepped groove.

According to the concrete piston provided by the utility model, the base body is of an annular structure, the rubber cup is provided with an inner ring part, and the inner ring part extends from one axial end of the base body to the other axial end of the base body and is attached to the inner peripheral side surface of the base body;

and/or the rubber cup is provided with an outer ring part, the outer ring part extends from one end of the base body in the axial direction to the other end of the base body and is attached to the peripheral side face of the base body, and the outer ring part is clamped between the base body and the reinforcing layer.

According to the concrete piston provided by the utility model, arc-shaped chamfers are arranged at the sharp corners of the base body, the rubber cup and the reinforcing layer which are in contact with each other.

According to the concrete piston provided by the utility model, the base body is an engineering plastic part; and/or the reinforced layer is a cloth sandwiched rubber layer; and/or a plurality of short fibers are distributed in the rubber cup.

The utility model also provides a concrete piston assembly, which comprises a connecting rod and a concrete piston, wherein the concrete piston is coaxially connected with the connecting rod, and the concrete piston is any one of the concrete pistons.

The utility model also provides a pumping system which comprises the main oil cylinder, the conveying cylinder and the concrete piston, wherein the concrete piston is arranged in the conveying cylinder and is coaxially connected with a piston rod of the main oil cylinder, and the concrete piston is any one of the concrete pistons.

The utility model also provides a working machine comprising the pumping system.

According to the concrete piston, the concrete piston assembly, the pumping system and the operation machine, the rubber cup is fixed at one end of the base body, the base body is used as a structural support of the concrete piston and is used as a sealing element, and the rubber cup and the peripheral side face of the base body are provided with the reinforcing layer. On the premise of ensuring the sealing performance of the concrete piston, the reinforcing layer is in frictional contact with the conveying cylinder, so that the tear resistance and the wear resistance of the lip of the rubber cup are improved, the friction loss of the concrete piston is reduced, and the service life of the concrete piston is prolonged.

Drawings

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is one of the schematic structural diagrams of a concrete piston provided by the present invention;

FIG. 2 is a second schematic structural view of a concrete piston according to the present invention;

FIG. 3 is a third schematic structural view of a concrete piston according to the present invention;

FIG. 4 is a fourth schematic view of the structure of the concrete piston provided by the present invention;

FIG. 5 is a fifth schematic view of the structure of the concrete piston provided by the present invention;

FIG. 6 is a sixth schematic view of the structure of the concrete piston provided by the present invention;

FIG. 7 is a seventh schematic structural view of a concrete piston according to the present invention;

FIG. 8 is an eighth schematic structural view of a concrete piston according to the present invention;

FIG. 9 is a ninth schematic view of the structure of a concrete piston provided by the present invention;

FIG. 10 is a cross-sectional view of a concrete piston according to the present invention;

reference numerals are as follows:

1. a substrate; 11. A first end face; 111. A protrusion;

12. a second end face; 121. A stepped groove; 2. A rubber cup;

21. a body; 211. A lip; 22. An inner ring portion;

23. an outer ring portion; 3. An enhancement layer.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for the sake of clarity in describing the numbering of the components of the product and do not represent any substantial difference, unless explicitly stated or limited otherwise. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

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, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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.

The concrete piston of the present invention will be described with reference to fig. 1 to 10.

As shown in fig. 1, which is one of the structural schematic diagrams of the concrete piston provided by the present invention, the concrete piston provided by the embodiment of the present invention includes a base 1, a rubber cup 2 and a reinforcement layer 3. Rubber packing cup 2 fixed connection is on the ascending terminal surface of the axial of base member 1, and enhancement layer 3 sets up in the periphery side of rubber packing cup 2 and base member 1.

Wherein, the peripheral side surfaces of the rubber cup 2 and the matrix 1 are side surfaces departing from the central axis of the concrete piston. The substrate 1 can be a structural member with higher strength than rubber, such as a plastic member or a metal member. The rubber cup 2 is used for sealing between the concrete piston and the conveying cylinder and can be manufactured on the base body 1 through a vulcanization process. The reinforcing layer 3 is arranged on the peripheral side face of the integral structure formed by the rubber cup 2 and the base body 1, and the reinforcing layer 3 can be directly attached to the peripheral side face or indirectly attached to the peripheral side face through other intermediate layers. The concrete piston, while reciprocating within the delivery cylinder, is in sliding contact with the inner wall of the delivery cylinder through the reinforcement layer 3.

Optionally, a lip 211 is arranged at one end of the rubber cup 2 away from the base 1, and the reinforcing layer 3 extends to be flush with the end face of the lip 211 away from the base 1 or to cover at least a part of the end face of the lip 211. In this way, the sealing performance of the concrete piston is maintained while the tear resistance and the abrasion resistance of the lip 211 are enhanced.

The reinforced layer 3 can be a rubber layer made of rubber material with tensile strength and wear resistance superior to those of the rubber cup 2; or the enhancement layer 3 is a fabric sandwich layer made of fabric sandwich materials; or the reinforced layer 3 is a cloth-sandwiched rubber layer made of cloth and rubber. The cloth-sandwiched layer or the cloth-sandwiched rubber layer has excellent tear resistance and wear resistance.

Optionally, the reinforcement layer 3 is a cloth-sandwiched rubber layer. The cloth-sandwiched rubber layer comprises a cloth-sandwiched layer and a rubber layer, and can be formed by sandwiching a cloth-sandwiched layer between two rubber layers or alternatively formed by alternately laminating multiple cloth-sandwiched layers and multiple rubber layers. Wherein the rubber layer in the cloth-sandwiched rubber layer is made of one or more of nitrile rubber, hydrogenated nitrile rubber, carboxylated nitrile rubber and the like. The fabric sandwich layer comprises a fiber cloth woven by one or more of cotton fiber, carbon fiber, aramid fiber, polyester fiber, polyamide fiber, acrylic fiber, viscose fiber, vinylon fiber, polyacrylonitrile fiber, nylon fiber and the like.

When in use, the concrete piston is arranged in the conveying cylinder. The concrete piston is fixedly connected with the main oil cylinder piston through a connecting rod. In the reciprocating motion of the main oil cylinder piston, the concrete piston is driven to reciprocate in the conveying cylinder, so that the pumping of concrete is realized. In the pumping process, the outer peripheral side of the concrete piston generates reciprocating friction with the inner wall of the conveying cylinder.

According to the concrete piston provided by the embodiment of the utility model, the rubber cup 2 is fixed at one end of the base body 1, the base body 1 is used as a structural support of the concrete piston, the rubber cup 2 is used as a sealing element, and the reinforcing layer 3 is arranged on the outer peripheral side surfaces of the rubber cup 2 and the base body 1. On the premise of ensuring the sealing performance of the concrete piston, the reinforcing layer 3 is in frictional contact with the conveying cylinder, so that the tear resistance and the wear resistance of the lip 211 of the rubber cup 2 are improved, the friction loss of the concrete piston is reduced, and the service life of the concrete piston is prolonged.

In the embodiment of the utility model, the substrate 1 is an engineering plastic part. The engineering plastic has high bearing performance, hydrolysis resistance, high temperature resistance and wear resistance. The compressive strength at 5% strain is > 50 MPa. Wherein, the engineering plastic part is made of one or more of engineering plastics and composite materials thereof, such as polyester, polyformaldehyde, polyphenylene sulfide, nylon, phenolic resin, polyester resin, epoxy resin, polyketones, polysulfones, polyimide and the like.

The engineering plastic piece is used as a supporting structure of the concrete piston and is fixedly connected with a connecting rod of the main oil cylinder, and the base body 1 bears loads from axial direction and radial direction in the reciprocating process of the concrete piston. Practical verification shows that the embodiment of the utility model adopts the engineering plastic part as the concrete piston of the supporting structure, and can bear the pressure of more than 50 Mpa.

Specifically, the base body 1 has a first end face 11 and a second end face 12 which are arranged oppositely, and the rubber cup 2 is fixedly connected to the first end face 11. The first end surface 11 of the base body 1 corresponds to one side of the concrete piston facing the concrete pumping direction, and the second end surface 12 of the base body 1 corresponds to one side of the concrete piston facing the main oil cylinder. By arranging the base body 1 as an engineering plastic piece, the axial load bearing capacity of the concrete piston can be improved. When the reinforced layer 3 and the rubber cup 2 are torn or seriously abraded, the basal body 1 can be prevented from scratching the conveying cylinder.

According to some embodiments of the present invention, the reinforcing layer 3 extends to the second end face 12 and is affixed to at least a portion of the second end face 12. As shown in fig. 1, the reinforcing layer 3 extends from the outer peripheral side surface of the base 1 to the second end surface 12, and is attached to a part of the second end surface 12; or, as shown in fig. 2, which is a second structural schematic view of the concrete piston provided by the present invention, the reinforcement layer 3 extends to the second end face 12 and is attached to the entire second end face 12.

In the embodiment, the reinforcing layer 3 is attached to the second end face 12, so that the bonding force between the reinforcing layer 3 and the base body 1 is enhanced, and the rubber cup 2 and the peripheral side face of the base body 1 can be more reliably bonded. When the concrete piston is connected with the connecting rod, the connecting rod is pressed on the second end face 12 of the base body 1, so that the reinforcing layer 3 on the second end face 12 is clamped, the reliability of connection between the reinforcing layer 3 and the base body 1 can be enhanced, and the reinforcing layer 3 is prevented from falling off from the base body 1. The reinforcing layer 3 is attached to a portion of the second end face 12, so that the usable area of the reinforcing layer 3 can be saved, and the cost can be saved.

In an embodiment in which the enhancement layer 3 is attached to a portion of the second end face 12, the second end face 12 is provided with a stepped groove 121, a bottom surface of the stepped groove 121 is connected to a peripheral side surface of the substrate 1, the enhancement layer 3 is attached to a groove bottom of the stepped groove 121, and a thickness of the enhancement layer 3 located in the stepped groove 121 is greater than or equal to a depth of the stepped groove 121.

Specifically, the stepped groove 121 is a groove structure annularly arranged on the outer side of the second end face 12, the reinforcement layer 3 extends from the outer peripheral side of the base body 1 to the groove bottom of the stepped groove 121 and is attached to the groove bottom of the stepped groove 121, and the thickness of the reinforcement layer 3 in the stepped groove 121 is larger than the depth of the groove. This enables the reinforcement layer 3 to be clamped when the connecting rod is connected to the second end face 12 to prevent the reinforcement layer 3 from falling off.

Fig. 3 shows a third schematic structural view of the concrete piston provided by the present invention, and fig. 4 shows a fourth schematic structural view of the concrete piston provided by the present invention. According to some embodiments of the present invention, a lip 211 is disposed at an end of the rubber cup 2 away from the base 1, and a protrusion 111 extending toward the lip 211 is convexly disposed on an end surface of the base 1.

Fig. 3 shows the provision of a projection 111 on the first end face 11 of the basic body 1 on the basis of fig. 1, and fig. 4 shows the provision of a projection 111 on the second end face 12 of the basic body 1 on the basis of fig. 2. The shape of the bulge 111 is similar to that of the lip 211, and the lip 211 at least covers the end surface of the bulge 111 along the axial direction of the concrete piston and the inner side surface close to the central axis of the concrete piston.

In the embodiment of the utility model, the bulge 111 is arranged on the base body 1 to support the lip 211, so that the axial bearing capacity of the concrete piston at the lip is improved.

As shown in fig. 5, which is a fifth structural schematic view of the concrete piston provided by the present invention, according to some embodiments of the present invention, the base body 1 is an annular structure, the rubber cup 2 is provided with an inner annular portion 22, and the inner annular portion 22 extends from one end of the base body 1 in the axial direction to the other end and is attached to the inner peripheral side surface of the base body 1. Specifically, the inner ring portion 22 extends from the first end face 11 of the base 1 in the direction of the second end face 12 and is adhered to at least a part of the inner peripheral side face of the base 1. As shown in fig. 6, which is a sixth schematic structural view of the concrete piston provided by the present invention, on the basis of the concrete piston structure shown in fig. 5, the reinforcement layer 3 is completely attached to the second end face 12 of the base 1.

Wherein, the inner peripheral side surface of the matrix 1 is a side surface facing the central axis of the concrete piston. The rubber cup 2 comprises a body 21, the body 21 is connected with the first end face 11, and the lip 211 is arranged at one end, far away from the base body 1, of the body 21 and integrally formed with the body 21. The inner ring portion 22 is connected to the body 21 on the side closer to the center axis of the concrete piston and extends along the inner peripheral side surface of the base 1 in the direction from the first end surface 11 toward the second end surface 12. The inner ring portion 22 may be integrally formed with the body 21 through a vulcanization process.

In the actual manufacturing process of the concrete piston, if the rubber cup 2 is vulcanized only on the first end surface 11 of the base body 1, a sufficient bonding force between the rubber cup 2 and the base body 1 is required, so that the vulcanization process of the rubber cup 2 is difficult. In the embodiment of the utility model, the inner ring part 22 is attached to at least one part of the inner peripheral side surface of the base body 1, so that the bonding force between the rubber cup 2 and the base body 1 is increased, and the process difficulty in vulcanizing the rubber cup 2 on the first end surface 11 is reduced.

When the concrete piston shown in fig. 5 or fig. 6 is connected with the connecting rod, the connecting rod and the base body 1 simultaneously clamp the rubber cup 2 and the reinforcing layer 3, and the possibility that the rubber cup 2 and the reinforcing layer 3 fall off from the base body 1 is reduced.

When the inner ring portion 22 is attached to a portion of the inner peripheral side surface, the inner peripheral side surface of the base 1 is provided with a stepped groove 121, the stepped groove 121 is connected to the first end surface 11, the inner ring portion 22 extends from the first end surface 11 to a groove bottom attached to the stepped groove 121, and the thickness of the inner ring portion 22 is greater than the depth of the stepped groove 121. So that the reinforcement layer 3 can be clamped when the connecting rod is connected to the base body 1.

As shown in fig. 7, which is a seventh schematic structural diagram of the concrete piston provided by the present invention, according to some embodiments of the present invention, the rubber cup 2 is provided with an outer ring portion 23, and the outer ring portion 23 extends from one end of the base body 1 in the axial direction to the other end and is attached to the outer peripheral side surface of the base body 1. The outer ring portion 23 is interposed between the base 1 and the reinforcing layer 3. Specifically, the outer ring portion 23 extends from the first end face 11 in the axial direction of the base 1 toward the second end face 12 and is affixed to at least a part of the outer peripheral side face of the base 1. Referring to fig. 8, which is an eighth schematic structural view of the concrete piston provided by the present invention, on the basis of the concrete piston structure shown in fig. 7, the reinforcement layer 3 is completely attached to the second end face 12 of the base 1.

Wherein, rubber packing cup 2 includes body 21, and body 21 is connected with first terminal surface 11, and body 21 is kept away from the one end of base member 1 and with body 21 integrated into one piece to lip 211. The outer ring portion 23 is connected to the side of the body 21 away from the center axis of the concrete piston and extends in the direction from the first end face 11 to the second end face 12 along the inner peripheral side surface of the base 1. The outer ring portion 23 may be integrally formed with the body 21 through a vulcanization process. When the rubber cup 2 is provided with the inner ring portion 22, the main body 21, the inner ring portion 22, and the outer ring portion 23 are integrally formed.

In the embodiment of the utility model, the outer ring part 23 is attached to at least one part of the inner peripheral side surface of the base body 1, so that the binding force between the rubber cup 2 and the base body 1 is increased, and the process difficulty of vulcanizing the rubber cup 2 on the first end surface 11 is reduced. The rubber cup 2 is prevented from falling off from the base body 1 by attaching the reinforcing layer 3 to the outer side of the outer ring portion 23. The outer ring part 23 made of rubber is arranged between the outer peripheral side surface of the base body 1 and the reinforcing layer 3, so that the sealing performance between the concrete piston and the conveying cylinder can be enhanced. In the case where the base 1 is provided with the protrusion 111, the rubber cup 2 in the present embodiment completely covers the protrusion 111.

Fig. 9 shows a ninth schematic structural diagram of the concrete piston provided by the present invention, and fig. 10 shows a tenth schematic structural diagram of the concrete piston provided by the present invention. The rubber cup 2 in the concrete piston shown in fig. 9 and 10 is provided with the inner ring portion 22 and the outer ring portion 23 at the same time, so that the bonding force between the rubber cup and the base 1 is enhanced to a greater extent, and the process difficulty of vulcanizing the rubber cup 2 on the base 1 is reduced to a greater extent on the premise of ensuring the connection reliability between the rubber cup 2 and the base 1.

In fig. 1, 2, 5, 6, 9, and 10, the base 1 may be provided with the projection 111. In fig. 1-4, 7 and 8, the rubber cup 2 may also be provided with an inner ring portion 22. In fig. 1-6, the rubber cup 2 may also be provided with an outer ring portion 23.

According to some embodiments of the utility model, the sharp corners of the base body 1, which are in contact with the rubber cup 2 and the reinforcing layer 3, are provided with arc-shaped chamfers. For example, C0.5-C20, optionally C10. The stress concentration of base member 1, rubber cup 2 and enhancement layer 3 can be reduced to the arc chamfer, prolongs the life of rubber cup 2 and enhancement layer 3.

According to some embodiments of the utility model, a plurality of short fibers are distributed within the rubber cup 2. Namely, the rubber cup 2 is made of rubber and short fiber reset material. Wherein, the short fiber in the rubber cup 2 comprises one or more of short fiber or fiber pulp such as cotton fiber, carbon fiber, aramid fiber, polyester fiber, polyamide fiber, acrylic fiber, viscose fiber, vinylon fiber, polyacrylonitrile fiber, nylon fiber, aramid pulp, polyacrylonitrile fiber and the like. The rubber in the rubber cup 2 comprises one or more of nitrile rubber, hydrogenated nitrile rubber, carboxyl nitrile rubber and the like. The rubber cup 2 is reinforced by distributing a plurality of short fibers in the rubber cup 2, so that the bearing capacity of the rubber cup 2 is improved, and the service life of the concrete piston is prolonged.

The utility model also provides a concrete piston assembly. The concrete piston assembly comprises a connecting rod and a concrete piston, and the concrete piston is coaxially connected with the connecting rod. Wherein, the concrete piston is the concrete piston of any one of the above embodiments. Specifically, the concrete piston assembly further comprises a pressing plate, wherein the connecting rod is provided with a mounting end face, and the pressing plate is coaxially connected with the connecting rod and respectively pressed on a first end face 11 and a second end face 12 of the concrete piston. The clamp plate is provided with a mounting ring penetrating through the base body 1, and the connecting rod is tightly connected with the mounting ring through a bolt. When the rubber cup 2 is provided with the inner ring portion 22, the inner ring portion 22 is clamped between the mounting ring and the base body 1, namely, the inner ring portion 22 is in interference fit with the mounting ring and the base body 1.

The utility model also provides a pumping system which comprises a main oil cylinder, a conveying cylinder and a concrete piston. The concrete piston is arranged in the conveying cylinder and is coaxially connected with the piston rod of the main oil cylinder, wherein the concrete piston is the concrete piston in any embodiment. The piston rod of the master cylinder is a connecting rod in the concrete piston assembly in any embodiment.

The utility model also provides a working machine comprising the pumping system. The work machine includes, but is not limited to, a concrete pump truck, a concrete pump, a concrete casting machine, and the like. Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. The concrete piston is characterized by comprising a base body, a rubber cup and an enhancement layer, wherein the rubber cup is fixedly connected to one axial end face of the base body, and the enhancement layer is arranged on the peripheral side faces of the rubber cup and the base body.

2. The concrete piston as recited in claim 1, wherein a lip is formed at an end of the rubber cup away from the base, and a protrusion extending toward the lip is convexly formed on the end surface of the base.

3. The concrete piston of claim 1, wherein the base body has a first end face and a second end face which are arranged oppositely, the rubber cup is fixedly connected to the first end face, and the reinforcing layer extends to the second end face and is attached to at least one part of the second end face.

4. The concrete piston of claim 3, wherein the second end face is provided with a stepped groove, the bottom surface of the stepped groove is connected with the peripheral side surface of the base body, the reinforcing layer is attached to the bottom surface of the stepped groove, and the thickness of the reinforcing layer in the stepped groove is greater than or equal to the depth of the stepped groove.

5. The concrete piston according to claim 1, wherein the base body is of an annular structure, the rubber cup is provided with an inner ring portion, and the inner ring portion extends from one end of the base body in the axial direction to the other end of the base body and is attached to the inner peripheral side surface of the base body;

and/or, the rubber packing cup is equipped with outer ring portion, outer ring portion follow the ascending one end of axial of base member extends to the other end and attaches in the periphery side of base member, outer ring portion clamp is located the base member with between the enhancement layer.

6. The concrete piston according to any one of claims 1 to 5, wherein the sharp corners of the base body in contact with the rubber cup and the reinforcement layer are provided with arc-shaped chamfers.

7. The concrete piston according to any one of claims 1 to 5, wherein said base is an engineered plastic part; and/or the reinforced layer is a cloth-sandwiched rubber layer; and/or a plurality of short fibers are distributed in the rubber cup.

8. A concrete piston assembly, characterized by comprising a connecting rod and a concrete piston, wherein the concrete piston is coaxially connected with the connecting rod, and the concrete piston is the concrete piston according to any one of claims 1-7.

9. A pumping system is characterized by comprising a main oil cylinder, a conveying cylinder and a concrete piston, wherein the concrete piston is arranged in the conveying cylinder and is coaxially connected with a piston rod of the main oil cylinder, and the concrete piston is the concrete piston according to any one of claims 1 to 7.

10. A work machine comprising a pumping system as claimed in claim 9.