Concrete piston and pumping device

Abstract

The application belongs to the technical field of concrete pumping equipment, and particularly relates to a concrete piston and a pumping device, which comprise a piston body, a bottom reinforcement and a cloth clamping layer. The bottom reinforcement is coaxially arranged at the bottom of the piston body, and the cloth clamping layer covers the outer peripheral wall of the piston body, the outer peripheral wall and the bottom wall of the bottom reinforcement and extends to the inner peripheral wall of the bottom reinforcement. The concrete piston reciprocates in a concrete delivery cylinder to complete the pumping action of the pumping device. Therefore, the service life of the concrete piston will affect the pumping efficiency of the pumping device. In the application, the cloth clamping layer covers the outer peripheral wall of the piston body, the outer peripheral wall and the bottom wall of the bottom reinforcement and extends to the inner peripheral wall of the bottom reinforcement to realize the full wrapping of the piston body by the cloth clamping layer, so as to strengthen the wear resistance of the piston body and prolong the service life of the concrete piston.

Description

Technical Field

[0001] This application belongs to the technical field of concrete pumping equipment, and specifically relates to a concrete piston and pumping device. Background Technology

[0002] The concrete piston is a key component in the concrete pumping system of a concrete pump truck and is also a wear part. The concrete piston reciprocates within the concrete delivery cylinder. During use, due to the immense pressure generated by the concrete, the concrete piston is prone to deformation, leading to sealing failure, poor material suction, and leakage of water and slurry, thus affecting the pump truck's delivery efficiency. Furthermore, as customer demands continue to increase, the operating conditions for the concrete piston are becoming more severe, placing greater demands on the material properties of the concrete piston.

[0003] In the existing technology, concrete pistons are made of rubber materials, which have problems such as low strength and poor wear resistance, resulting in a short service life for concrete pistons. Utility Model Content

[0004] The purpose of this application is to provide a concrete piston and pumping device, which aims to extend the service life of the concrete piston.

[0005] To achieve the above objectives, this application provides a concrete piston, comprising: The piston body is a hollow structure with a concrete piston lip at the top; A bottom reinforcement is coaxially disposed at the bottom of the piston body; A fabric layer covers the outer surfaces of the piston body and the bottom reinforcement, and extends from the outer diameter of the end face of the concrete piston lip of the piston body to the inner diameter of the bottom surface of the bottom reinforcement.

[0006] In some embodiments, the fabric layer includes a first adhesive layer and a first fabric layer, wherein the first adhesive layer is made of rubber material and the first fabric layer is made of fiber material.

[0007] In some embodiments, the first adhesive layer comprises two surface adhesive layers located on the surface, with the first fabric layer sandwiched between the two surface adhesive layers.

[0008] In some embodiments, the first adhesive layer further includes multiple intermediate adhesive layers, and the number of the first fabric layers is multiple, with the multiple first fabric layers and the multiple intermediate adhesive layers being staggered and stacked.

[0009] In some embodiments, the bottom reinforcement includes a second adhesive layer and a second fabric layer, the second adhesive layer being a rubber material component and the second fabric layer being a fiber material component, the second adhesive layer being sandwiched between two adjacent second fabric layers.

[0010] In some embodiments, the second adhesive layer and the second fabric layer have a V-shaped structure.

[0011] In some embodiments, the outer peripheral wall of the bottom reinforcement is formed with a plurality of groove structures, and the fabric layer covers the groove structures.

[0012] In some embodiments, the groove structure extends along the axial direction of the bottom reinforcement, and a plurality of the groove structures are arranged at intervals along the axial direction of the bottom reinforcement.

[0013] In some embodiments, the outer peripheral wall of the piston body is formed with a plurality of protrusions, and the fabric layer covers the protrusions.

[0014] This application also provides a pumping device, including the concrete piston described above.

[0015] The fabric layer is wrapped around the outer surface of the piston body and the bottom reinforcement, extending from the outer diameter of the end face of the concrete piston lip of the piston body to the inner diameter of the bottom surface of the bottom reinforcement. This is a full wrapping method. Due to the high strength of the fabric layer, the wear resistance of the piston body is improved, thereby increasing the service life of the concrete piston. Furthermore, the strength of the piston body is strengthened by adding the bottom reinforcement, which further increases the service life of the concrete piston.

[0016] Other features and advantages of the embodiments of this application will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the embodiments of this application and form part of the specification. They are used together with the following detailed description to explain the embodiments of this application, but do not constitute a limitation on the embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without any inventive effort. In the drawings: Figure 1 This is a cross-sectional schematic diagram of the concrete piston according to a specific embodiment of this application; Figure 2 This is a cross-sectional schematic diagram of the fabric layer according to a specific embodiment of this application; Figure 3 This is a cross-sectional schematic diagram of the bottom reinforcement according to a specific embodiment of this application; Figure 4 This is a planar projection view of the outer peripheral wall of the bottom reinforcement according to a specific embodiment of this application.

[0018] Explanation of reference numerals in the attached figures 100. Concrete piston; 1. Piston body; 2. Fabric layer; 21. First adhesive layer; 22. First fabric layer; 3. Bottom reinforcement; 31. Second adhesive layer; 32. Second fabric layer; 4. Groove structure; 5. Protruding structure; 6. Concrete piston lip. Detailed Implementation

[0019] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0020] The terminology of the concrete piston 100 and pumping device according to this application is described below with reference to the accompanying drawings.

[0021] like Figure 1 As shown, a specific embodiment of this application provides a concrete piston 100, including a piston body 1, a bottom reinforcement 3, and a fabric layer 2. The piston body 1 is a hollow structure with a concrete piston lip 6 on the upper part. The bottom reinforcement 3 is coaxially disposed at the bottom of the piston body 1. The fabric layer 2 is on the outer surface of the piston body 1 and the bottom reinforcement 3, and extends from the outer diameter of the end face of the concrete piston lip 6 of the piston body 1 to the inner diameter of the bottom surface of the bottom reinforcement 3.

[0022] The concrete piston 100 reciprocates within the concrete delivery cylinder to complete the pumping action of the pumping device. Therefore, the service life of the concrete piston 100 affects the pumping efficiency of the pumping device. In this application, a fabric layer 2 is used to cover the outer surfaces of the piston body 1 and the bottom reinforcement 3, extending from the outer diameter of the end face of the concrete piston lip 6 of the piston body 1 to the inner diameter of the bottom surface of the bottom reinforcement 3. This achieves complete wrapping of the piston body 1 with the fabric layer 2, enhancing the wear resistance of the piston body 1 and thus extending the service life of the concrete piston 100.

[0023] Meanwhile, by using a fully enclosed method to set the fabric layer 2, the effective bonding area between the fabric layer 2 and the piston body 1 can be increased, so as to prevent the fabric layer 2 from detaching from the piston body 1 as a whole, thereby improving the reliability of the concrete piston 100.

[0024] Furthermore, since the bottom of the concrete piston 100 needs to withstand enormous pressure during the pumping process, the bottom of the concrete piston 100 is prone to deformation, thus affecting the pumping efficiency of the pumping device. In this application, the bottom strength of the concrete piston 100 is enhanced by providing a bottom reinforcement 3 at the bottom of the piston body 1, thereby extending the service life of the concrete piston 100.

[0025] like Figure 2 As shown, in some embodiments, the fabric layer 2 includes a first adhesive layer 21 and a first fabric layer 22, wherein the first adhesive layer 21 is made of rubber material and the first fabric layer 22 is made of fiber material.

[0026] Specifically, the first adhesive layer 21 includes two surface adhesive layers on the surface, and the first fabric layer 22 is sandwiched between the two surface adhesive layers. The surface adhesive layer on the inner side interacts with the piston body 1 to form a cross-linked network structure to ensure the connection strength between the fabric layer 2 and the piston body 1, thereby preventing the fabric layer 2 from falling off.

[0027] Furthermore, the first adhesive layer 21 also includes multiple intermediate adhesive layers, and the first fabric layer 22 is multi-layered. The multiple first fabric layers 22 and the multiple intermediate adhesive layers are staggered and stacked to enhance the wear resistance of the fabric layer 2, thereby further enhancing the wear resistance of the concrete piston 100 and extending the service life of the concrete piston 100.

[0028] It should be noted that the rubber material of the first adhesive layer 21 is consistent with the material of the piston body 1, such as one or more of the following rubbers: nitrile rubber, hydrogenated nitrile rubber, fluororubber, and silicone rubber; the first fabric layer 22 is a fiber material made of one or more of the following fibers: cotton fiber, polyester fiber, aramid fiber, polyester fiber, acrylic fiber, vinylon fiber, polyacrylonitrile fiber, and nylon fiber.

[0029] It is also important to note that the preparation of the fabric layer 2 mainly depends on the selection of the adhesive coating process, which directly affects the stability of the adhesive strength and the uniformity of the horizontal properties of the fabric layer 2. By using a doctor blade coating machine and employing a squeezing roller method, excess adhesive can be removed, allowing the adhesive to penetrate deeper into the interior of the fabric layer 2, thereby improving the forming effect and adhesive strength of the fabric layer 2 during subsequent pressing. Specifically, the fabric layer 2 is prepared by sewing the two ends of the treated first fabric layer 22 onto the adhesive coating machine, adjusting the tension roller to keep the first fabric layer 22 flat, and using a doctor blade coating method to evenly coat the adhesive onto the surface of the fabric. After drying, the fabric layer 2 is obtained.

[0030] like Figure 3 As shown, in some embodiments, the bottom reinforcement 3 includes a second adhesive layer 31 and a second fabric layer 32. The first adhesive layer 21 is made of rubber material, and the second fabric layer 32 is made of fiber material. The second adhesive layer 31 is sandwiched between two adjacent second fabric layers 32. Multiple layers of second adhesive layers 31 are used to bond multiple layers of second fabric layers 32 to form a compacted multilayer structure. The number of layers can reach 10 to 20, thereby ensuring sufficient bottom strength of the concrete piston 100 and extending the service life of the concrete piston 100.

[0031] Furthermore, the second adhesive layer 31 and the second fabric layer 32 have a V-shaped structure to increase the bonding area between the second adhesive layer 31 and the second fabric layer 32, thereby preventing the second adhesive layer 31 and the second fabric layer 32 from separating and affecting the strength of the bottom reinforcement 3, and thus extending the service life of the concrete piston 100.

[0032] It should be noted that the second adhesive layer 31 and the second fabric layer 32 can also adopt a planar structure, and the planar structure is also within the protection scope of this application.

[0033] In some embodiments, the thickness of the first adhesive layer 21 and the second adhesive layer 31 is 0.1 mm to 1.2 mm, and the specific thickness can be one of 0.1 mm, 0.3 mm, 0.5 mm, 0.7 mm, 1.0 mm and 1.2 mm, depending on the required bonding strength of the concrete piston 100.

[0034] Furthermore, due to functional requirements and cost considerations, the materials of the first fabric layer 22 and the second fabric layer 32 are different.

[0035] like Figure 4 As shown, in some embodiments, the outer peripheral wall of the bottom reinforcement 3 has multiple groove structures 4, and the fabric layer 2 covers the groove structures 4. The groove structures 4 are used to ensure the leakage of high-temperature oil during pumping, so as to avoid the phenomenon of "hot oil spraying" caused by the accumulation of high-temperature and high-pressure grease and pump retraction, thereby improving the reliability of the concrete piston 100.

[0036] Furthermore, the groove structure 4 extends axially along the bottom reinforcement 3, and multiple groove structures 4 are arranged at intervals along the axial direction of the bottom reinforcement 3. The depth of the groove structure 4 should not be too large, preferably 5mm to 10mm, and the cross-sectional shape of the groove structure 4 can be rectangular, triangular, etc.

[0037] In some embodiments, the outer peripheral wall of the piston body 1 has a plurality of protrusions 5, and the fabric layer 2 covers the protrusions 5. The protrusions 5 are used to increase the connection area between the fabric layer 2 and the piston body 1 to avoid delamination, thereby preventing the fabric layer 2 from separating from the piston body 1.

[0038] In some embodiments, the inner diameter of the concrete piston lip 6 is larger than the inner diameter of the piston body 1, and the inner peripheral wall of the concrete piston lip 6 is inclined to the top surface of the piston body 1 and inclines away from the centerline of the concrete piston 100. The concrete piston lip 6 is used to perfectly connect and assemble with the mechanical gland of the piston assembly of the pumping device to prevent grout leakage due to gaps.

[0039] Specifically, the angle between the inner peripheral wall of the concrete piston lip 6 and the top surface of the piston body 1 is greater than 90°. The specific angle depends on the top surface size of the piston body 1 and the mechanical pressure cap size of the piston assembly of the pumping device. The angle also determines the thickness of the concrete piston lip 6. Sufficient thickness can ensure the strength and resilience of the lip.

[0040] In some embodiments, the corners of the piston body 1 are chamfered, and the chamfered structure near the bottom is more conducive to the adhesion of the fabric layer 2.

[0041] A specific embodiment of this application also provides a pumping device, including a concrete piston 100. Since the pumping device employs all the embodiments of the concrete piston 100 described above, it possesses all the beneficial effects of the concrete piston 100.

[0042] A specific embodiment of this application also provides a pump truck, including a pumping device. Since the pump truck employs all the embodiments of the pumping device described above, it possesses all the beneficial effects of the pumping device.

[0043] In the description of this application, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0046] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A concrete piston, characterized in that, include: Piston body (1), wherein the piston body (1) is a hollow structure with a concrete piston lip (6) on the upper part; A bottom reinforcement (3) is coaxially disposed at the bottom of the piston body (1); and, The fabric layer (2) covers the outer surfaces of the piston body (1) and the bottom reinforcement (3), and extends from the outer diameter of the end face of the concrete piston lip (6) of the piston body (1) to the inner diameter of the bottom surface of the bottom reinforcement (3).

2. The concrete piston according to claim 1, characterized in that, The fabric layer (2) includes a first adhesive layer (21) and a first fabric layer (22), wherein the first adhesive layer (21) is made of rubber material and the first fabric layer (22) is made of fiber material.

3. The concrete piston according to claim 2, characterized in that, The first adhesive layer (21) includes two surface adhesive layers located on the surface, and the first fabric layer (22) is sandwiched between the two surface adhesive layers.

4. The concrete piston according to claim 3, characterized in that, The first adhesive layer (21) further includes multiple intermediate adhesive layers, and the first fabric layer (22) is multi-layered, with multiple layers of the first fabric layer (22) and multiple layers of the intermediate adhesive layers stacked alternately.

5. The concrete piston according to claim 1, characterized in that, The bottom reinforcement (3) includes a second adhesive layer (31) and a second fabric layer (32). The second adhesive layer (31) is made of rubber material, and the second fabric layer (32) is made of fiber material. The second adhesive layer (31) is sandwiched between two adjacent second fabric layers (32).

6. The concrete piston according to claim 5, characterized in that, The second adhesive layer (31) and the second fabric layer (32) have a V-shaped structure.

7. The concrete piston according to claim 1, characterized in that, The outer peripheral wall of the bottom reinforcement (3) has a plurality of groove structures (4), and the fabric layer (2) covers the groove structures (4).

8. The concrete piston according to claim 7, characterized in that, The groove structure (4) extends along the axial direction of the bottom reinforcement (3), and a plurality of the groove structures (4) are arranged at intervals along the axial direction of the bottom reinforcement (3).

9. The concrete piston according to claim 1, characterized in that, The outer peripheral wall of the piston body (1) has a plurality of protruding structures (5), and the fabric layer (2) covers the protruding structures (5).

10. A pumping device, characterized in that, Includes the concrete piston (100) according to any one of claims 1 to 9.

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