A novel concrete pump truck piston sealing structure
By introducing an outer ring with a fabric layer and a U-shaped lip design into the concrete piston seal structure, combined with a phenolic resin fabric layer and a water channel, the aging problem of traditional concrete piston seals under high-pressure pumping conditions is solved, achieving higher sealing performance and wear resistance, and extending service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI JIANUO SEALING TECH CO LTD
- Filing Date
- 2025-07-24
- Publication Date
- 2026-07-31
AI Technical Summary
Traditional concrete piston seals are prone to aging and cracking under high-pressure pumping, highly abrasive concrete, and long-term continuous operation conditions, leading to grout leakage and failure. They also lack wear resistance and high-temperature resistance.
It adopts an outer ring fabric layer structure, combined with a U-shaped lip and multiple fabric lip designs. The fabric layer is made of phenolic resin material, and the water channel optimizes lubrication and heat dissipation, improving sealing and wear resistance.
It improves the sealing performance, wear resistance, and high-temperature resistance of the concrete piston structure, thus extending its service life.
Smart Images
Figure CN224579758U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of sealing structures, specifically to a novel concrete piston sealing structure for pump trucks. Background Technology
[0002] As a core piece of equipment in modern construction, the concrete piston of a concrete pump truck is the most critical and vulnerable component in the pumping system. Traditional concrete piston seals generally use an integral polyurethane structure. Polyurethane has high wear resistance, but during continuous pumping, the friction temperature at the lip increases. When the temperature exceeds 70°C, the strength of the polyurethane material decreases by 15-20%, accelerating aging and cracking, leading to grout leakage and failure.
[0003] The above technical analysis shows that existing concrete piston seals still have systemic defects under harsh working conditions such as ultra-high pressure pumping, highly abrasive concrete, and long-term continuous operation. This is the root of the technical problem that this invention aims to solve. Utility Model Content
[0004] The purpose of this utility model is to solve the above problems and provide a new type of concrete piston structure for pump trucks. By adopting the setting of an outer ring with a cloth layer, the wear resistance and high temperature resistance of the concrete piston structure are improved.
[0005] To achieve the above objectives, the present invention adopts the following technical solution.
[0006] A novel concrete piston sealing structure for a pump truck includes a body and a fabric-reinforced layer. The body is connected to the fabric-reinforced layer. One end of the body is provided with a U-shaped lip, and the fabric-reinforced layer is provided with a fabric-reinforced lip. One end of the fabric-reinforced layer is provided with a water-passing groove.
[0007] Furthermore, the body is made of rubber.
[0008] Furthermore, the fabric layer is made of phenolic resin.
[0009] Furthermore, the fabric lip is convex.
[0010] Furthermore, the fabric layer is provided with at least two fabric-clamping lips.
[0011] Furthermore, the U-shaped lip and the fabric clamping lip are positioned in different directions.
[0012] Furthermore, the water channel is located at one end away from the U-shaped lip.
[0013] The positive effects of this novel concrete piston structure for a pump truck are:
[0014] The main body adopts a U-shaped main lip design, which allows high-pressure concrete to push the lip edge outward, achieving a pressure self-tightening effect and improving sealing performance. The outer ring is reinforced with a cloth layer, which improves the wear resistance and high temperature resistance of the concrete piston structure. Multiple cloth-reinforced lips are provided at the rear of the U-shaped main lip as secondary lips, which improves sealing reliability. A water channel is provided at the bottom of the cloth layer to optimize lubrication and heat dissipation and extend the service life of the concrete piston structure. Attached Figure Description
[0015] Figure 1 This is a schematic diagram provided by an embodiment of the present utility model.
[0016] The labels in the diagram are as follows:
[0017] 1. Body; 2. Fabric layer; 3. Fabric lip; 4. Water channel. Detailed Implementation
[0018] The following describes a specific embodiment of a novel concrete piston sealing structure for a pump truck according to the present invention, with reference to the accompanying drawings. However, it should be noted that the specific embodiments described are not intended to limit the specific implementation of the present invention. All similar structures and variations thereof employing the present invention should be included within the protection scope of the present invention. The following description of the embodiments is based on the accompanying drawings and is used to illustrate specific embodiments in which the present invention can be implemented. Directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are only for reference to the accompanying drawings. Therefore, the directional terms used are for the purpose of explaining and understanding the present invention, and not for limiting the present invention.
[0019] See Figure 1 A novel concrete piston sealing structure for a concrete pump truck includes a body 1 and a fabric-reinforced layer 2. The body 1 is connected to the fabric-reinforced layer 2. One end of the body 1 is provided with a U-shaped lip, and the fabric-reinforced layer 2 is provided with a fabric-reinforced lip 3. One end of the fabric-reinforced layer 2 is provided with a water-passing groove 4. The body 1 is made of rubber, and the fabric-reinforced layer 2 is made of phenolic resin fabric. The fabric-reinforced lip 3 is protruding, and at least two fabric-reinforced lips 3 are provided on the fabric-reinforced layer 2. The U-shaped lip and the fabric-reinforced lip 3 are oriented differently, and the water-passing groove 4 is located at the end away from the U-shaped lip.
[0020] In the diagram, the U-shaped lip faces upward, the fabric layer 2 is located on the left side of the main body 1, the fabric lip 3 is located on the left side of the fabric layer 2 and protrudes, and the water channel 4 is located at the bottom of the fabric layer 2.
[0021] The solution described in this utility model, during operation, uses high-pressure concrete to push the U-shaped lip of the main body 1 outward, achieving a pressure self-tightening effect and ensuring tight contact with the inner wall of the pump cylinder for sealing. Compared to the main body 1, the fabric-reinforced layer 2 has higher wear resistance and heat resistance. Multiple fabric-reinforced lips 3 prevent impurities in the rear cooling water from damaging the U-shaped lip, improving sealing reliability. The water-passing groove 4 at the bottom of the fabric-reinforced lips 3 facilitates the entry and exit of cooling water, optimizing lubrication and heat dissipation, and extending the service life of the concrete piston structure.
[0022] The main body 1 is made of high-elastic material and has a U-shaped main lip design to improve sealing performance; the fabric layer 2 improves the wear resistance and heat resistance of the concrete piston; the design of multiple fabric-reinforced lips 3 prevents impurities in the rear cooling water from damaging the main lip and improves sealing reliability; the water channel 4 optimizes lubrication and heat dissipation and extends the service life of the concrete piston structure.
[0023] The main body 1 adopts a U-shaped main lip, which allows high-pressure concrete to push the lip edge outward, achieving a pressure self-tightening effect and improving sealing performance. The outer ring is reinforced with a cloth layer 2, which improves the wear resistance and high temperature resistance of the concrete piston structure. Multiple cloth-reinforced lips 3 are provided at the rear of the U-shaped main lip as secondary lips, which improves sealing reliability. A water channel 4 is provided at the bottom of the cloth layer 2 to optimize lubrication and heat dissipation and extend the service life of the concrete piston structure.
Claims
1. A new type of pump truck concrete piston seal structure, characterized in that, It includes a body and a fabric layer, the body and the fabric layer are connected, one end of the body is provided with a U-shaped lip, the fabric layer is provided with a fabric lip, and one end of the fabric layer is provided with a water passage groove.
2. The concrete piston sealing structure for a slipform paver of claim 1, wherein, The main body is made of rubber.
3. The concrete piston sealing structure for a concrete pump truck according to claim 1, characterized in that, The fabric layer is made of phenolic resin.
4. The concrete piston sealing structure for a concrete pump truck according to claim 1, characterized in that, The lip of the fabric insert is raised.
5. The concrete piston sealing structure for a concrete pump truck according to claim 4, characterized in that, The fabric layer is provided with at least two fabric lip openings.
6. The concrete piston sealing structure for a concrete pump truck according to claim 1, characterized in that, The U-shaped lip and the fabric-inserting lip are set in different directions.
7. The concrete piston sealing structure for a concrete pump truck according to claim 1, characterized in that, The water channel is located at the end away from the U-shaped lip.