Rubber material pressure stabilizing device of water-stop belt extruder
By introducing a rubber pressure stabilization device into the water stop belt extruder, the pressure stabilization system composed of hydraulic cylinder and piston is automatically adjusted, which solves the problem of inconsistent rubber size and achieves the stability and consistency of water stop belt production.
Patent Information
- Application Number
- CN202421904076.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-09-02
- Estimated Expiration
- 2034-08-07
AI Technical Summary
The existing water stop extruder cannot achieve stable adjustment of the internal rubber pressure, resulting in inconsistent size after the rubber is extruded from the water stop, affecting product quality and consistency.
A pressure stabilization device for adhesive materials is designed for water stop extruders, and a pressure stabilization system consisting of a circular tube of rubber, a buffer cylinder and a hydraulic cylinder is designed to control the piston movement through the hydraulic cylinder, and the pressure of rubber is automatically adjusted to maintain stability.
It achieves rapid and stable rubber pressure, ensures consistency in the size of the water stop belt and the stability of product quality, and improves production efficiency and product qualification rate.
Smart Images
Figure CN223290291U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of railway tunnel waterproofing and drainage material production equipment, in particular to a rubber material pressure stabilizing device for a waterstop extruder. Background Art
[0002] The primary material used for drainage and waterproofing in railway tunnels is waterstops, a crucial component of a tunnel's overall waterproofing and directly impacting its service life. Currently, waterstops are mostly produced on extrusion lines. The second-stage adhesive is heated in an extruder to reduce its viscosity. Driven by the extruder's screw, the second-stage adhesive builds up pressure within the extruder. The adhesive then passes through the waterstop die connected to the die head to form a waterstop with the dimensions specified in the drawing. The final product is then cured in a high-temperature vulcanization line.
[0003] In actual production, the second-stage rubber is in the form of long strips, which are pulled into the extruder by the rotation of the extruder screw. The long strips of the second-stage rubber are not very regular and consistent, while the screw speed is uniform. This leads to inconsistent rubber entering the extruder per unit time, causing changes in the internal rubber pressure. Ultimately, the rubber fluctuates in size after being extruded from the waterstop die. In severe cases, the waterstop size may exceed the technical requirements. At the same time, due to changes in the external ambient temperature, the temperature of the second-stage rubber will also change. After being preheated in the extruder, its final temperature will also deviate. The temperature directly affects the viscosity of the second-stage rubber, causing changes in the pressure of the rubber in the extruder. Ultimately, the rubber fluctuates in size after being extruded from the waterstop die.
[0004] The existing waterstop extruder is unable to achieve the function of regulating the pressure of the internal rubber compound. In order to ensure the stability and consistency of the size of the produced products, it is necessary to design and develop a pressure stabilizing device that maintains a stable pressure of the rubber compound. Summary of the Invention
[0005] The purpose of the utility model is to provide a waterstop extruder rubber material pressure stabilizing device, aiming to solve the problem that the size of the rubber material of the existing waterstop extruder fluctuates after being extruded from the waterstop die.
[0006] The technical solution adopted by the utility model is: a rubber pressure stabilizing device for a waterstop extruder, comprising a rubber round tube arranged between the waterstop extruder and the machine head, one end of the rubber round tube being connected to the waterstop extruder through a flange, and the other end being connected to the machine head through a flange, a cylindrical buffer cylinder being vertically installed on the upper part of the rubber round tube, the interior of the buffer cylinder being connected to the interior of the rubber tube, a hydraulic oil cylinder being arranged above the buffer cylinder, a piston being installed in the buffer cylinder, the piston being connected to the piston rod of the hydraulic oil cylinder through a connecting rod, the hydraulic oil cylinder driving the piston to move up and down, a circle of inwardly concave scraping grooves being provided on the side wall of the piston, the lower surface of the scraping groove being flat, and the upper surface being in the shape of an upwardly arched arc.
[0007] A further technical solution of the present invention is: the rubber round tube is a pressure-bearing tube made of steel or aluminum alloy, the inner diameter of the rubber round tube is the same as the inner diameter of the waterstop extruder, and the inner wall of the rubber round tube is smooth, which facilitates the up and down movement of the piston.
[0008] A further technical solution of the present invention is that the hydraulic cylinder is a controllable hydraulic cylinder, the pressure increase or pressure relief of which is controlled by an automatic control system, and the movement of the piston can be automatically adjusted.
[0009] A further technical solution of the present invention is that the piston is made of cast iron or aluminum alloy to improve the durability of the piston.
[0010] The beneficial effects of the present invention are as follows: Due to the adoption of the above-mentioned technical solution, the rubber material pressure stabilizing device for a waterstop extruder of the present invention sets the pressure of the hydraulic cylinder so that the hydraulic cylinder generates a constant force on the piston in the buffer cylinder, which is equal to the force exerted by the rubber material on the piston. When the pressure of the rubber material changes, the piston in the buffer cylinder will shift, reducing or increasing the pressure of the rubber material, allowing the rubber material pressure to quickly return to its original pressure, thereby achieving the purpose of stabilizing the pressure. The device has a simple structure and can quickly adjust the rubber material pressure to maintain its stability, thereby ensuring the dimensional consistency and quality stability of the waterstop. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 This is a schematic cross-sectional view of a rubber material pressure stabilizing device for a waterstop extruder according to the present invention;
[0012] Figure 2 This is a schematic cross-sectional view of the piston of the present invention;
[0013] Figure 3 It is a schematic diagram of the top view of the piston of the utility model. DETAILED DESCRIPTION
[0014] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0015] Example:
[0016] like Figures 1 to 3The rubber pressure stabilizing device of a waterstop extruder shown includes a rubber round tube 2 arranged between the waterstop extruder 1 and the machine head 7. One end of the rubber round tube 2 is connected to the waterstop extruder 1 through a flange, and the other end is connected to the machine head 7 through a flange. A cylindrical buffer cylinder 4 is vertically installed on the upper part of the rubber round tube. The buffer cylinder 4 is welded to the rubber round tube 2 as one body. The interior of the buffer cylinder 4 is connected to the interior of the rubber tube. A hydraulic cylinder 6 is arranged above the buffer cylinder 4. A piston 5 is installed in the buffer cylinder 4. The piston 5 is connected to the piston rod 61 of the hydraulic cylinder 6 through a connecting rod 41. The hydraulic cylinder 6 drives the piston to move up and down. A circle of inwardly concave scraping grooves 51 is provided on the side wall of the piston 5. The lower surface 512 of the scraping groove is flat, and the upper surface 511 is in the shape of an upwardly arched arc, so that a circular arc incision facing the rubber is formed on the piston.
[0017] Preferably, the rubber round tube 2 is a pressure-bearing tube made of steel or aluminum alloy, the inner diameter of the rubber round tube is the same as the inner diameter of the waterstop extruder, and the inner wall of the rubber round tube is smooth.
[0018] Preferably, the hydraulic cylinder is a controllable hydraulic cylinder, and the pressure increase or pressure relief is controlled by an automatic control system to realize automatic control of the hydraulic cylinder and improve the automation performance of the device. The automatic control system adopts existing technology and will not be described in detail here.
[0019] Preferably, the piston is made of cast iron or aluminum alloy to improve the durability of the piston.
[0020] Working principle description:
[0021] The working pressure required for the rubber material to work is P1, the piston area in the buffer cylinder is S1, the hydraulic cylinder set pressure is P2, and the internal piston cross-sectional area is S2. At this time, P1*S1=P2*S2, then P2=P1*
[0022] (S2 / S1). Set the hydraulic cylinder pressure. At this time, the piston remains stationary due to the equal forces on the upper and lower connecting rods. When the pressure of the rubber material changes due to external factors, the upper and lower forces on the connecting rod are no longer equal and displacement occurs, increasing or decreasing the feeding pressure until it returns to the working pressure. For example, when the rubber material pressure suddenly increases, the increase in the force at the bottom of the connecting rod pushes the piston upward. At this time, the volume inside the rubber material tube increases, and the rubber material pressure decreases rapidly until it returns to the working pressure. When the rubber material pressure suddenly decreases, the decrease in the force at the bottom of the connecting rod pushes the piston downward under the push of the upper hydraulic cylinder. At this time, the volume inside the rubber material tube decreases, and the rubber material pressure increases rapidly until it returns to the working pressure, thereby achieving the purpose of stabilizing the rubber material pressure.
[0023] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A rubber material pressure stabilizing device for a waterstop extruder, characterized by: It includes a rubber tube arranged between the waterstop extruder and the machine head, one end of the rubber tube is connected to the waterstop extruder through a flange, and the other end is connected to the machine head through a flange. A cylindrical buffer cylinder is vertically installed on the upper part of the rubber tube, and the interior of the buffer cylinder is connected to the interior of the rubber tube. A hydraulic cylinder is arranged above the buffer cylinder, and a piston is installed in the buffer cylinder. The piston is connected to the piston rod of the hydraulic cylinder through a connecting rod. The hydraulic cylinder drives the piston to move up and down. A circle of inwardly concave scraping grooves is provided on the side wall of the piston. The lower surface of the scraping groove is flat, and the upper surface is an upwardly arched arc.
2. The rubber material pressure stabilizing device for a waterstop extruder according to claim 1, characterized in that: The rubber round tube is a pressure-bearing tube made of steel or aluminum alloy. The inner diameter of the rubber round tube is the same as the inner diameter of the waterstop extruder, and the inner wall of the rubber round tube is smooth.
3. The rubber material pressure stabilizing device for a waterstop extruder according to claim 1, characterized in that: The hydraulic cylinder is a controllable hydraulic cylinder, and the pressure increase or pressure relief is controlled by an automatic control system.
4. The rubber material pressure stabilizing device for a waterstop extruder according to claim 1, characterized in that: The piston is made of cast iron or aluminum alloy.