Self-balancing device for vulcanization pressure of conveyor belt joint

Abstract

The utility model discloses vulcanization pressure self -balancing device of conveyer belt joint, specifically relates to conveyer belt joint vulcanization technical field, including press, the bottom of press is provided with base, the top fixedly connected with hydraulic cylinder of press, the output fixedly connected with connecting plate of hydraulic cylinder, the bottom fixedly connected with elastic block of connecting plate, the bottom fixedly connected with pressure plate of elastic block, four springs are fixedly connected between connecting plate and press, the bottom of pressure plate is provided with a plurality of pressure detector, the bottom fixedly connected with heating plate of pressure plate. The utility model discloses through pressure detector and detects, when detecting that the pressure is uneven, and the control system adjusts the telescopic amount of four pistons according to real -time data, respectively promotes the local compensation force of pressure plate to be applied to the top block by the local compensation force of pressure plate, and elastic block and spring provide flexible support and buffer, ensure that the pressure distribution is even, avoid local overpressure or underpressure to improve the quality stability of vulcanization joint.

Description

Technical Field

[0001] This utility model relates to the field of conveyor belt joint vulcanization technology, and more specifically, to a conveyor belt joint vulcanization pressure self-balancing device. Background Technology

[0002] The existing conveyor belt joint vulcanization pressure device is a special equipment for hot vulcanization joints of rubber conveyor belts. It provides uniform temperature and pressure through heating plates and hydraulic systems, causing the rubber at the joint to undergo a vulcanization reaction under high temperature and high pressure, realizing molecular chain cross-linking and forming a permanent connection with the same strength as the conveyor belt body. This ensures that the joint meets the body strength requirements of industry standards. It has the characteristics of good sealing, stable pressure holding, and uniform temperature, and is widely used in on-site maintenance and splicing operations of conveyor belts in industries such as mining, ports, and power.

[0003] Traditional conveyor belt joint vulcanization pressure devices typically use fixed pressure or simple hydraulic control during the vulcanization process, which cannot dynamically adjust the pressure distribution in real time. This results in uneven pressure between the heating plate and the contact surface of the conveyor belt, especially noticeable at wide conveyor belts or uneven joints. This may cause insufficient local vulcanization or excessive extrusion of rubber material, thereby reducing the consistency of joint strength.

[0004] In summary, to improve the quality and reliability of conveyor belt joint vulcanization, it is necessary to address the problem that traditional vulcanization pressure devices cannot dynamically adjust the pressure distribution in real time. This would ensure that the pressure between the heating plate and the conveyor belt contact surface remains uniform and stable, thereby guaranteeing consistent density and strength in all areas of the vulcanized joint, avoiding localized vulcanization defects, and improving the overall performance and service life of the joint. Utility Model Content

[0005] The self-balancing device for vulcanizing pressure of conveyor belt joints provided by this utility model aims to solve the following problem: In the vulcanization process, fixed pressure or simple hydraulic control is usually used, which cannot dynamically adjust the pressure distribution in real time. This results in uneven pressure between the heating plate and the contact surface of the conveyor belt, which may cause insufficient local vulcanization or excessive extrusion of rubber material, thereby reducing the consistency of joint strength.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-balancing device for vulcanizing pressure of a conveyor belt joint, comprising a press, a base at the bottom of the press, a hydraulic cylinder fixedly connected to the top of the press, a connecting plate fixedly connected to the output end of the hydraulic cylinder, an elastic block fixedly connected to the bottom of the connecting plate, a pressure plate fixedly connected to the bottom of the elastic block, four springs fixedly connected between the connecting plate and the press, multiple pressure detectors at the bottom of the pressure plate, a heating plate fixedly connected to the bottom of the pressure plate, a silicone plate fixedly connected to the bottom of the heating plate, four pistons fixedly connected inside the connecting plate, and a top block fixedly connected to the output end of the pistons, the pistons being used to drive the top blocks to move up and down.

[0007] In a preferred embodiment, an extension plate is fixedly connected to the front end of the base, and two threaded short rods are rotatably connected to the top of the extension plate.

[0008] In a preferred embodiment, a pressure plate is threaded onto the outer surface of the threaded short rod, and a rotating block is fixedly connected to the top of the threaded short rod.

[0009] In a preferred embodiment, three limiting rods are fixedly connected to the top of the base, and a threaded rod is rotatably connected to the top of the base.

[0010] In a preferred embodiment, a fixing frame is fixedly connected to the top of the limiting rod, and a motor is fixedly connected to the top of the fixing frame.

[0011] In a preferred embodiment, the output end of the motor is fixedly connected to the threaded rod, and the motor is used to drive the threaded rod to rotate.

[0012] In a preferred embodiment, a blower is fixedly connected to the right end of the press, and a connecting pipe is provided at the right end of the press.

[0013] In a preferred embodiment, a nozzle is fixedly connected to the bottom of the connecting pipe, and the top of the connecting pipe is connected to an external water source.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention uses a pressure detector for detection. When uneven pressure is detected, the control system adjusts the extension and retraction of the four pistons according to real-time data, and pushes the top block to apply local compensation force to the pressure plate. The elastic block and spring provide flexible support and buffering to ensure uniform pressure distribution and avoid local overpressure or underpressure, thereby improving the quality stability of the vulcanized joint. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the press structure of this utility model.

[0018] Figure 3 This is a schematic diagram of the elastic block structure of this utility model.

[0019] Figure 4 This is a schematic diagram of the pressure plate structure of this utility model.

[0020] Figure 5 This is a schematic diagram of the pressure detector structure of this utility model.

[0021] The attached figures are labeled as follows: 1. Press; 2. Hydraulic cylinder; 3. Connecting plate; 4. Elastic block; 5. Spring; 6. Pressure plate; 7. Heating plate; 8. Piston; 9. Top block; 10. Pressure detector; 11. Silicone plate; 12. Base; 13. Extension plate; 14. Threaded short rod; 15. Pressure plate; 16. Rotating block; 17. Limiting rod; 18. Fixing frame; 19. Motor; 20. Threaded rod; 21. Fan; 22. Connecting pipe; 23. Nozzle. Detailed Implementation

[0022] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0023] The vulcanization pressure device for conveyor belt joints is a core piece of equipment ensuring the quality of rubber conveyor belt joints. Its performance directly affects the tensile strength, durability, and sealing performance of the joint. Traditional devices provide constant pressure through a hydraulic system, combined with a heating plate to achieve the vulcanization reaction. While this meets basic process requirements, it has significant shortcomings in terms of dynamic adaptability of pressure control. Especially in conditions involving wide conveyor belts (width exceeding 2 meters) or uneven joint surfaces, the fixed pressure mode struggles to achieve precise control of pressure distribution, leading to fluctuations in vulcanization quality and becoming a key factor restricting the consistency of joint performance.

[0024] Traditional equipment often uses unidirectional hydraulic cylinders or mechanical locking structures to provide static pressure, which remains constant throughout the vulcanization process. This design ignores the changes in the rheological properties of rubber materials during vulcanization: as temperature rises, the viscosity of the rubber compound first decreases and then increases, requiring dynamic adjustment of the pressure. A fixed pressure may lead to excessive flow of the rubber compound during the heating phase (too high pressure) or insufficient pressure during the crosslinking phase (too low pressure). Research data shows that under fixed pressure, the actual contact pressure at the edges of wide conveyor belts may decrease, directly resulting in insufficient edge vulcanization.

[0025] As the width of the conveyor belt increases, the pressure transmission efficiency of the traditional single-point pressurization method decreases significantly. Due to the rigid deformation of the heating plate and the thickness tolerance of the conveyor belt, the pressure distribution on the longitudinal and transverse sides of the plate exhibits a "high in the middle, low around the edges" characteristic. Actual measurement data from a 12-meter-wide conveyor belt at a port shows that this unevenness reduces the cross-linking density in the edge areas, creating weak areas. Furthermore, the temperature field uniformity of the wide plate also deteriorates due to pressure unevenness, further exacerbating vulcanization differences.

[0026] Errors in the stepped processing of conveyor belt joints or wear of old belts can lead to microscopic irregularities on the joint surface. Traditional devices cannot compensate for pressure caused by localized deformation; high-pressure areas may over-extract the rubber compound (forming "insufficient rubber"), while low-pressure areas may develop vulcanization bubbles. Experiments show that when surface unevenness exceeds a certain limit, the tensile strength dispersion coefficient of the joint increases. More seriously, excessive local pressure can damage the core fiber structure, and this damage can propagate into transverse cracks under dynamic loads.

[0027] The vulcanization process can be divided into three stages: rubber melt flow, initial cross-linking, and complete vulcanization. The pressure requirements for each stage are drastically different: the flow stage requires lower pressure to prevent rubber loss, while the cross-linking stage requires high pressure to ensure tight molecular chain bonding. Traditional fixed pressure cannot adapt to these variations, often resulting in early rubber loss (excessive pressure) or later porosity retention (insufficient pressure). A case study from a mine shows that the porosity of joints using constant pressure is higher than that of dynamically adjusted pressure processes.

[0028] Vulcanization quality depends on the combined effect of temperature and pressure, but traditional equipment controls these two independently. In reality, the poor thermal conductivity of rubber causes a lag between the heating plate temperature and the actual temperature of the rubber layer, and a fixed pressure cannot compensate for this difference in thermal conductivity. For example, when the temperature measurement point shows a reading, the middle layer of rubber may only be at the set temperature; if the pressure is not adjusted accordingly, this will result in insufficient vulcanization of the middle layer. Advanced infrared thermal imaging studies have revealed that temperature gradients under traditional processes can cause significant differences in the degree of cross-linking between the layers of the joint.

[0029] Even traditional hydraulically controlled devices struggle to achieve real-time adjustment due to slow valve response. At critical temperature points where rubber viscosity changes rapidly, the system cannot keep up with pressure demands, creating control blind spots. Furthermore, hydraulic fluctuations exacerbate the instability of rubber flow. Comparative tests show that using a high-frequency servo hydraulic system can reduce the standard deviation of joint peel strength.

[0030] As new standards increase the requirements for joint strength consistency, the limitations of traditional devices become more apparent. Modern conveyor belts are evolving towards higher strength and wider widths, necessitating pressure control systems with zoned control, dynamic compensation, and intelligent learning capabilities. Some advanced companies have already introduced pressure feedback systems based on strain gauge arrays, improving pressure uniformity and demonstrating the necessity of technological innovation.

[0031] Overcoming the limitations of traditional equipment requires a three-pronged approach: first, developing a multi-cylinder synchronous hydraulic system to achieve dynamic pressure zoning balance; second, integrating a real-time pressure sensor network to construct a closed-loop control algorithm; and third, establishing a temperature-pressure coupling model to optimize the vulcanization process curve. These improvements will enable joint strength consistency to meet new standards, extend the service life of conveyor belts, and lay the foundation for the development of intelligent vulcanization equipment.

[0032] To overcome the inherent shortcomings of traditional vulcanizing pressure devices, the introduction of intelligent technology has become a crucial direction for industry transformation. By embedding a high-precision pressure sensor array and temperature monitoring module, real-time pressure and temperature data from various areas of the heating plate can be collected. In the early stages of vulcanization, the pressure is automatically reduced to prevent rubber overflow, and in the crosslinking stage, pressure is compensated in different areas to counteract the effects of heat deformation. Furthermore, combined with machine learning technology, the system can accumulate historical process data and autonomously optimize pressure control parameters for different bandwidths and rubber formulations, ultimately achieving the technical goals of pressure distribution uniformity error and vulcanization strength dispersion coefficient. This intelligent upgrade not only improves joint reliability but also reduces rubber loss, significantly increasing economic efficiency.

[0033] Refer to the instruction manual appendix Figures 1 to 5 The conveyor belt joint vulcanization pressure self-balancing device includes a press 1, a base 12 at the bottom of the press 1, a hydraulic cylinder 2 fixedly connected to the top of the press 1, a connecting plate 3 fixedly connected to the output end of the hydraulic cylinder 2, an elastic block 4 fixedly connected to the bottom of the connecting plate 3, a pressure plate 6 fixedly connected to the bottom of the elastic block 4, four springs 5 ​​fixedly connected between the connecting plate 3 and the press 1, multiple pressure detectors 10 at the bottom of the pressure plate 6, a heating plate 7 fixedly connected to the bottom of the pressure plate 6, a silicone plate 11 fixedly connected to the bottom of the heating plate 7, four pistons 8 fixedly connected inside the connecting plate 3, a top block 9 fixedly connected to the output end of the piston 8, and the piston 8 is used to drive the top block 9 to move up and down.

[0034] It should be noted that the hydraulic cylinder 2 drives the connecting plate 3 to move downward, pushing the pressure plate 6 and the heating plate 7 to press the conveyor belt for heating and vulcanization. When the pressure detector 10 detects uneven pressure, the control system adjusts the extension and retraction of the four pistons 8 according to real-time data, and pushes the top block 9 to apply local compensation force to the pressure plate 6. The elastic block 4 and the spring 5 provide flexible support and buffering to ensure uniform pressure distribution and avoid local overpressure or underpressure, thereby improving the quality stability of the vulcanized joint.

[0035] Refer to the instruction manual appendix Figure 1 An extension plate 13 is fixedly connected to the front end of the base 12, and two threaded short rods 14 are rotatably connected to the top of the extension plate 13.

[0036] It should be noted that the extension plate 13 is used to expand the worktable, which facilitates the positioning and fixing of the conveyor belt joint. The operator can rotate the threaded short rod 14 by rotating the rotating block 16.

[0037] Refer to the instruction manual appendix Figure 1 A pressure plate 15 is threadedly connected to the outer surface of the threaded short rod 14, and a rotating block 16 is fixedly connected to the top of the threaded short rod 14.

[0038] It should be noted that the pressure plate 15 is then driven to move along the thread, firmly clamping the edge of the conveyor belt onto the extension plate 13, preventing misalignment of the joint due to material thermal expansion or external interference during the vulcanization process.

[0039] Refer to the instruction manual appendix Figure 1 The top of the base 12 is fixedly connected to three limit rods 17, and the top of the base 12 is rotatably connected to a threaded rod 20.

[0040] It should be noted that the limit rods 17 are symmetrically distributed and are used to guide the vertical lifting trajectory of the press 1 to prevent deviation.

[0041] Refer to the instruction manual appendix Figure 1 The top of the limiting rod 17 is fixedly connected to a fixing frame 18, and the top of the fixing frame 18 is fixedly connected to a motor 19.

[0042] It should be noted that the fixed frame 18 is a rigid welded structure, which provides stable support for the motor 19.

[0043] Refer to the instruction manual appendix Figure 1 The output end of motor 19 is fixedly connected to threaded rod 20, and motor 19 is used to drive threaded rod 20 to rotate.

[0044] It should be noted that the motor 19 can precisely control the rotation angle of the threaded rod 20, thereby adjusting the height of the press 1 to adapt to the vulcanization requirements of conveyor belts of different specifications.

[0045] Refer to the instruction manual appendix Figure 5 A blower 21 is fixedly connected to the right end of the press 1, and a connecting pipe 22 is provided at the right end of the press 1.

[0046] It should be noted that the blower 21 is a centrifugal high-pressure blower 21, which quickly blows the heating plate 7 and the surface of the conveyor belt after vulcanization to accelerate cooling and curing.

[0047] Refer to the instruction manual appendix Figure 5 The bottom of the connecting pipe 22 is fixedly connected to the nozzle 23, and the top of the connecting pipe 22 is connected to the external water source.

[0048] It should be noted that the nozzle 23 has a multi-hole fan-shaped design, which can evenly spray cooling water to achieve an automatic cooling process.

[0049] Working principle: Hydraulic cylinder 2 drives connecting plate 3 to move downward, pushing pressure plate 6 and heating plate 7 to press the conveyor belt for heating and vulcanization. When pressure detector 10 detects uneven pressure, the control system adjusts the extension and retraction of four pistons 8 according to real-time data, pushing top block 9 to apply local compensation force to pressure plate 6. Elastic block 4 and spring 5 provide flexible support and buffering to ensure uniform pressure distribution and avoid local overpressure or underpressure, thereby improving the quality stability of vulcanized joints. Extension plate 13 is used to expand the worktable for easy positioning and fixing of conveyor belt joints. The operator can rotate the rotating block 16 to drive the threaded short rod 14 to rotate, thereby driving the pressure plate 15 to move along the thread. The press 1 is moved to firmly clamp the edge of the conveyor belt onto the extension plate 13 to prevent misalignment of the joint due to material thermal expansion or external interference during vulcanization. The limiting rods 17 are symmetrically distributed to guide the vertical lifting trajectory of the press 1 and prevent deviation. The fixed frame 18 is a rigid welded structure that provides stable support for the motor 19. The motor 19 can precisely control the rotation angle of the threaded rod 20, thereby adjusting the height of the press 1 to adapt to the vulcanization requirements of conveyor belts of different specifications. The blower 21 is a centrifugal high-pressure blower that quickly blows the heating plate 7 and the surface of the conveyor belt after vulcanization to accelerate cooling and curing. The nozzle 23 has a multi-hole fan-shaped design that can evenly spray cooling water to achieve an automatic cooling process.

[0050] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A self-balancing device for vulcanization pressure of conveyor belt joints, characterized in that: The device includes a press (1), a base (12) at the bottom of the press (1), a hydraulic cylinder (2) fixedly connected to the top of the press (1), a connecting plate (3) fixedly connected to the output end of the hydraulic cylinder (2), an elastic block (4) fixedly connected to the bottom of the connecting plate (3), a pressure plate (6) fixedly connected to the bottom of the elastic block (4), four springs (5) fixedly connected between the connecting plate (3) and the press (1), multiple pressure detectors (10) at the bottom of the pressure plate (6), a heating plate (7) fixedly connected to the bottom of the pressure plate (6), a silicone plate (11) fixedly connected to the bottom of the heating plate (7), four pistons (8) fixedly connected inside the connecting plate (3), a top block (9) fixedly connected to the output end of the piston (8), and the piston (8) is used to drive the top block (9) to move up and down.

2. The self-balancing device for vulcanization pressure of conveyor belt joints according to claim 1, characterized in that: An extension plate (13) is fixedly connected to the front end of the base (12), and two threaded short rods (14) are rotatably connected to the top of the extension plate (13).

3. The self-balancing device for vulcanization pressure of conveyor belt joints according to claim 2, characterized in that: A pressure plate (15) is threaded onto the outer surface of the threaded short rod (14), and a rotating block (16) is fixedly connected to the top of the threaded short rod (14).

4. The self-balancing device for vulcanization pressure of conveyor belt joints according to claim 2, characterized in that: The top of the base (12) is fixedly connected to three limit rods (17), and the top of the base (12) is rotatably connected to a threaded rod (20).

5. The self-balancing device for vulcanization pressure of conveyor belt joints according to claim 4, characterized in that: The top of the limiting rod (17) is fixedly connected to a fixing frame (18), and the top of the fixing frame (18) is fixedly connected to a motor (19).

6. The self-balancing device for vulcanization pressure of conveyor belt joints according to claim 5, characterized in that: The output end of the motor (19) is fixedly connected to the threaded rod (20), and the motor (19) is used to drive the threaded rod (20) to rotate.

7. The self-balancing device for vulcanization pressure of conveyor belt joints according to claim 1, characterized in that: A fan (21) is fixedly connected to the right end of the press (1), and a connecting pipe (22) is provided on the right end of the press (1).

8. The self-balancing device for vulcanization pressure of conveyor belt joints according to claim 7, characterized in that: The bottom of the connecting pipe (22) is fixedly connected to the nozzle (23), and the top of the connecting pipe (22) is connected to the external water source.

Images