Device for removing pin through high-pressure oxygen hot melting

Abstract

The utility model relates to the technical field of hot melting, and particularly discloses a device for removing a pin through high-pressure oxygen hot melting. Comprising a supporting frame, a hot melting platform and a hot melting assembly. The hot melting platform achieves multi-axis movement through a first moving frame and a second moving frame, a three-degree-of-freedom hot melting arm is arranged at the bottom, and a detachable hot melting gun is arranged at the tail end. A guide rail and a rack transmission system are arranged on the top of the supporting frame, and automatic displacement control is achieved through motor driving. The hot melting platform is integrated with the raw material tank, consumables can be conveniently and rapidly replaced, and operation continuity is improved. Multiple layers of buffering anti-collision pieces are arranged on the two sides of the device, elastic materials and air chamber structures are included, impact is effectively absorbed, and the equipment stability is protected. The device solves the problems that the hot melting precision is difficult to control through manual operation, the efficiency is low, the safety is poor and the like, efficient and accurate corrosion of the pin is achieved through an automatic mechanical structure, and the device is particularly suitable for dismantling operation of a large steel structure or a deeply-embedded pin and has the advantages of being easy and convenient to operate, high in adaptability, low in maintenance cost and the like.

Description

Technical Field

[0001] This utility model relates to the field of hot melt technology, and in particular to a device for removing pins by hot melt with high pressure oxygen. Background Technology

[0002] In the routine maintenance of industrial equipment and the dismantling of steel structures, the removal of pins is a frequent yet challenging task. When traditional mechanical removal methods fail, technicians often resort to carbon arc gouging to break down the pins. While this method can achieve the desired results in some cases, the process is quite time-consuming because carbon arc gouging requires planing the pin material layer by layer, which is clearly insufficient in modern industrial production that demands high efficiency. Furthermore, the process generates a large amount of carbon powder and metal dust, which not only severely pollutes the working environment but also poses a potential risk to the respiratory system of operators. Moreover, for longer pins, carbon arc gouging often fails to completely penetrate them, resulting in insufficient release of internal stress and affecting the effectiveness of subsequent removal operations.

[0003] To effectively address the aforementioned problems, high-pressure oxygen thermal fusion technology has been proposed as an innovative alternative. The core of this technology lies in combining high-temperature thermal fusion with the oxidation effect of high-pressure oxygen to rapidly melt a through-hole in the pin, thereby effectively releasing the internal stress of the pin. This method significantly improves the efficiency of pin removal and, to some extent, solves the problems existing in traditional methods. However, despite the numerous theoretical advantages of high-pressure oxygen thermal fusion technology, it still faces some challenges in practical application. Currently, its application still relies on manual operation, leading to insufficient operational precision, increased labor intensity, and certain safety risks. Therefore, how to further optimize high-pressure oxygen thermal fusion technology, improve its automation level, reduce manual intervention, and enhance the safety of the operation process has become an important issue that urgently needs to be addressed by the industry.

[0004] Patent "A Hot Melting Device for Nitrile Latex Processing" (Publication No. CN216544133U, hereinafter referred to as Prior Art 1) discloses a hot melting device. The main technical principle of Prior Art 1 is to achieve efficient hot melting of nitrile latex through the following design: a ring-shaped heating plate is set in the middle of the hot melting chamber, and a suspended material cylinder (with through holes) is placed inside, allowing the solid raw material to be uniformly melted by heating and then flowing out through the through holes to avoid blockage. A second heating plate in the water tank heats water, and a water pump sprays hot water into the hot melting chamber through a high-pressure nozzle to flush away residues and prevent blockage of the through holes and residual material. The hot melting chamber has a conical lower end for easy material discharge, and the tank wall is insulated. The water tank is equipped with a water inlet and a drain pipe to regulate the water volume. However, this hot melting device lacks an adaptive design for the shape of the pin, making it difficult to ensure precise control of the hot melting angle and depth. This may lead to poor hot melting results or even damage to surrounding industrial equipment or steel structures. Finally, Prior Art 1 also struggles to stably control the hot melting angle and depth. Utility Model Content

[0005] In view of this, this utility model provides a pin removal device that uses high-pressure oxygen to heat melt the pin, in order to solve the problem in the prior art that it is difficult to stably control the heat melting angle and depth through manual operation, resulting in uneven melting or energy waste.

[0006] This utility model provides a pin removal device using high-pressure oxygen heat fusion, including a support frame and a heat fusion platform that moves based on the support frame; the heat fusion platform includes a first movable frame and a second movable frame that can move based on the first movable frame; a heat fusion assembly is provided at the bottom of the second movable frame, and the raw material tank of the heat fusion assembly is disposed on the heat fusion platform and provides raw material to the heat fusion assembly; the heat fusion assembly includes a heat fusion arm with at least three degrees of freedom, and a heat fusion gun is provided at the end of the heat fusion arm; the heat fusion gun is detachably connected to the heat fusion arm.

[0007] Preferably, the top of the support frame is provided with a first set of guide rails, and the hot melt platform is connected to the support frame through a movable slider; a first transmission rack is also provided between the first set of guide rails.

[0008] Preferably, the hot melt platform is further provided with a first motor, which is connected to the first transmission rack via a first transmission gear on its output shaft to drive the hot melt platform.

[0009] Preferably, the bottom of the hot melt platform is provided with at least one set of auxiliary wheels, which contact the top of the support frame and can slide on the top of the support frame.

[0010] Preferably, the top of the support frame is provided with a first anti-collision member and a second anti-collision member at both ends; the first anti-collision member includes multiple buffer layers, and an air chamber is provided between each pair of buffer layers; the second anti-collision member and the first anti-collision member are configured identically.

[0011] Preferably, the first movable frame is provided with a second set of guide rails and a second transmission rack between the second set of guide rails; the first movable frame is provided with a movable seat that can move based on the first movable frame.

[0012] Preferably, the second movable frame is disposed on the movable base; the second movable frame is also provided with a third set of guide rails and a third transmission rack disposed between the third set of guide rails.

[0013] Preferably, the movable base is provided with a second motor and a third motor; a second transmission gear on the output shaft of the second motor is connected to the second transmission rack to drive the movable base to move; a third transmission gear on the output shaft of the third motor is connected to the third transmission rack to drive the second movable frame to move.

[0014] Preferably, both ends of the first and second movable frames are provided with limit sensors; when the limit sensors are triggered, the movable base and the second movable frame stop moving.

[0015] Preferably, the hot melt arm base and the first arm rotatable based on the base are provided; the first arm is provided with a second arm rotatable based on the first arm; the hot melt gun is disposed on the second arm.

[0016] The device for removing pins by high-pressure oxygen thermal melting provided by this utility model has the following beneficial effects:

[0017] In this invention, the hot melt arm, combined with a guide rail and rack and pinion transmission system, enables precise adjustment of the hot melt gun's spatial position, ensuring that the oxygen flow acts perpendicularly to the pin's center and eliminating angular deviations caused by manual operation. Automatic translation of the hot melt platform, moving base, and second moving frame is achieved through motor drive and rack and pinion transmission (first, second, and third motors), reducing manual intervention and lowering operational risks under high temperature and high pressure environments. The detachable hot melt gun and material tank design allows for quick replacement of consumables, shortening downtime and making it suitable for continuous operation scenarios. Furthermore, the detachable hot melt gun allows for manual operation when the equipment cannot operate automatically, increasing the equipment's flexibility and adaptability. Standardized mechanical motion trajectories enable even non-professionals to efficiently remove difficult pins, reducing energy waste caused by manual operation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments of this utility model will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, and these are all within the protection scope of this utility model.

[0019] Figure 1 This is a schematic diagram of a device for removing pins by hot melting with high-pressure oxygen.

[0020] Figure 2 This is a schematic diagram of a pin removal device that uses high-pressure oxygen to melt and remove pins from another angle.

[0021] Figure 3 This is a structural diagram of the hot melt platform, the first movable frame, and the second movable frame;

[0022] Parts and their numbers in the diagram:

[0023] 100-Support frame, 111-First set of guide rails, 112-Moving slider, 113-First transmission rack, 114-First motor, 115-Auxiliary wheel, 116-First anti-collision component, 117-Second anti-collision component;

[0024] 200-Hot Melt Platform;

[0025] 300-First moving frame, 311-Second set of guide rails, 312-Second transmission rack, 313-Moving seat, 314-Second motor, 315-Third motor, 316-Limit sensor;

[0026] 400 - Second moving frame; 411 - Third set of guide rails; 412 - Third transmission rack;

[0027] 500-Hot melt assembly, 511-Raw material tank, 512-Hot melt arm, 513-Hot melt gun, 514-Base, 515-First arm, 516-Second arm. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that, in this document, relational terms such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. Unless otherwise specified, embodiments of the present invention and the various features thereof can be combined with each other, all within the protection scope of the present invention.

[0029] Example 1

[0030] Please see Figure 1 This utility model provides a high-pressure oxygen heat-melting pin removal device. When pins cannot be removed normally, carbon arc gouging is usually used to break the pins. This method has three drawbacks: first, it is slow; second, it generates a large amount of carbon powder, which is harmful to the health of workers; and third, it cannot gouge through long pins. The proposed method is to use high-pressure oxygen heat melting to break the pins. This method can quickly heat-melt a through hole in the pin through high temperature, thereby releasing the pin stress and removing the pin.

[0031] Please see Figure 1 and Figure 2In this embodiment, the high-pressure oxygen hot-melt pin removal device includes a support frame 100 and a hot-melt platform 200 that moves based on the support frame 100; the hot-melt platform 200 includes a first movable frame 300 and a second movable frame 400 that can move based on the first movable frame 300; the bottom of the second movable frame 400 is provided with a hot-melt assembly 500, the raw material tank 511 of the hot-melt assembly 500 is disposed on the hot-melt platform 200 and provides raw material for the hot-melt assembly 500; the hot-melt assembly 500 includes a hot-melt arm 512 with at least three degrees of freedom, and the end of the hot-melt arm 512 is provided with a hot-melt gun 513; the hot-melt gun 513 is detachably connected to the hot-melt arm 512.

[0032] In use, the operator controls and adjusts the hot melt gun 513 by moving the movable hot melt platform 200, the first movable frame 300, and the second movable frame 400, aligning the hot melt gun 513 at the predetermined position of the pin. Then, the hot melt assembly 500 is activated, and the material in the material tank 511 is sprayed out through the hot melt gun 513, generating a high-temperature flame under the combustion of high-pressure oxygen, thus hot melting the pin. Because the hot melt arm 512 has at least three degrees of freedom, the angle and position of the hot melt gun 513 can be flexibly adjusted to ensure accurate and rapid hot melting. During the hot melting process, the high-temperature flame quickly melts a through hole in the pin, releasing the pin's stress. After hot melting is complete, the operator can easily remove the pin, completing the entire removal process.

[0033] The core principle of high-pressure oxygen thermal melting technology is to locally heat the metal pin to a molten state using a high-temperature heat source (such as an oxy-acetylene flame or plasma arc), while simultaneously injecting a high-pressure oxygen stream. The intense oxidation reaction between the oxygen and the molten metal releases a large amount of heat, further accelerating the melting process. The high-pressure oxygen not only participates in the exothermic reaction but also blows away the molten metal oxides, creating a through-hole and completely releasing the stress inside the pin. Compared to traditional carbon arc gouging, this technology combines the synergistic effects of thermal melting, oxidation, and blowing, resulting in higher efficiency and more thorough stress release. However, precise control of oxygen pressure, heat source temperature, and operating angle is crucial to avoid over-melting or safety risks.

[0034] In practical applications, this technology is particularly suitable for removing high-hardness or large-sized pins. Its rapid melting capability significantly shortens operation time while reducing dust pollution from carbon arc gouging. Compared to traditional carbon arc gouging, the high-pressure oxygen thermal melting pin removal device provided in this embodiment has significant advantages. First, the device can quickly create a through hole in the pin through high-temperature thermal melting, greatly improving removal efficiency. Second, since no large amount of carbon powder is generated during the thermal melting process, it does not pose a health hazard to workers. The device can also effectively break down long pins, solving the problem that traditional methods cannot penetrate long pins. Furthermore, by combining standardized mechanical motion trajectories with human intervention, even non-professionals can efficiently remove difficult pins, reducing energy waste caused by manual operation.

[0035] Further, please see Figure 1 and Figure 2 The support frame 100 has a first set of guide rails 111 on its top, and the hot melt platform 200 is connected to the support frame 100 via a movable slider 112; a first transmission rack 113 is also provided between the first set of guide rails 111. The hot melt platform 200 is also provided with a first motor 114, which is connected to the first transmission rack 113 via a first transmission gear on its output shaft to drive the hot melt platform 200.

[0036] The hot melt platform 200 is used to install the hot melt assembly 500, as well as a first movable frame 300 and a second movable frame 400 to assist the hot melt assembly 500 in displacement.

[0037] In use, the first motor 114 is started. The first motor 114 meshes with the first transmission rack 113 via the first transmission gear on the output shaft, driving the hot melt platform 200 to move smoothly along the first set of guide rails 111. Subsequently, the operator adjusts the positions of the first moving frame 300 and the second moving frame 400 to ensure that the hot melt assembly 500 is accurately aligned with the pin. During this process, the hot melt assembly 500 heats up rapidly under the power supply, reaching the preset hot melt temperature. After the hot melt platform 200 moves to the preset position, the hot melt assembly 500 gradually penetrates the pin, forming a through hole, making the pin easy to remove.

[0038] Furthermore, the bottom of the hot melt platform 200 is provided with at least one set of auxiliary wheels 115. These auxiliary wheels 115 contact the top of the support frame 100 and can slide on top of the support frame 100. This allows the hot melt platform 200 to move more smoothly and reduces frictional loss. The design of the auxiliary wheels 115 not only enhances the stability of the hot melt platform 200 during movement but also ensures the accuracy of the hot melt operation. Simultaneously, the sliding contact between the auxiliary wheels 115 and the top of the support frame 100 effectively reduces the resistance during the movement of the hot melt platform 200, making the entire drive system more efficient and energy-saving. This design further optimizes the performance of the hot melt equipment and improves work efficiency.

[0039] Further, please see Figure 1 and Figure 2 The support frame 100 has a first anti-collision member 116 and a second anti-collision member 117 at its two ends. The first anti-collision member 116 includes multiple buffer layers, with air chambers between each pair of buffer layers. The second anti-collision member 117 is configured identically to the first anti-collision member 116. This anti-collision design effectively prevents the hot-melt platform 200 from hard collisions with the top of the support frame 100 during movement, even if there is a positional deviation or improper operation. This protects the hot-melt assembly 500 and the overall structure of the equipment from damage. The multiple buffer layers absorb the impact force during collisions, while the air chambers between the buffer layers further enhance the buffering effect, allowing the anti-collision member to quickly return to its original shape upon impact, maintaining its anti-collision function. The symmetrical arrangement of the first anti-collision member 116 and the second anti-collision member 117 ensures that the hot-melt platform 200 is adequately protected during lateral movement, improving the safety and reliability of the equipment. This anti-collision design not only extends the service life of the equipment but also provides a safer working environment for operators.

[0040] Furthermore, the first movable frame 300 is provided with a second set of guide rails 311 and a second transmission rack 312 between the second set of guide rails 311; the first movable frame 300 is provided with a movable seat 313 that can move based on the first movable frame 300.

[0041] The second movable frame 400 is disposed on the movable base 313; the second movable frame 400 is also provided with a third set of guide rails 411 and a third transmission rack 412 disposed between the third set of guide rails 411.

[0042] The movable base 313 is equipped with a second motor 314 and a third motor 315; the second transmission gear on the output shaft of the second motor 314 is connected to the second transmission rack 312 to drive the movable base 313 to move; the third transmission gear on the output shaft of the third motor 315 is connected to the third transmission rack 412 to drive the second movable frame 400 to move.

[0043] In use, the operator can start the second motor 314, whose output shaft's second transmission gear meshes with the second transmission rack 312, thereby driving the movable seat 313 to move along the second set of guide rails 311. Simultaneously, when the position of the second movable frame 400 needs adjustment, the third motor 315 can be started, whose output shaft's third transmission gear meshes with the third transmission rack 412, driving the second movable frame 400 to move along the third set of guide rails 411 on the movable seat 313. This dual-axis drive and the movement design of the hot-melt platform 200 give the hot-melt assembly 500 at least three degrees of freedom of movement. This not only improves the flexibility and precision of the hot-melt platform 200's movement but also greatly enhances the ease of operation and work efficiency of the equipment. In use, the operator can easily move the hot-melt platform 200 to any position within the working area by controlling the start, stop, and direction of the motors, meeting the work requirements of different positions.

[0044] Furthermore, both ends of the first movable frame 300 and the second movable frame 400 are provided with limit sensors 316; when the limit sensor 316 is triggered, the movable seat 313 and the second movable frame 400 stop moving.

[0045] In operation, when the movable base 313 or the second movable frame 400 moves to its preset limit position, it will contact the limit sensor 316. The limit sensor 316 then sends a signal to the control system. Upon receiving the signal, the control system immediately cuts off the power to the corresponding motor, stopping the movable base 313 or the second movable frame 400 from moving. This design effectively prevents the movable base 313 and the second movable frame 400 from exceeding their working range due to excessive movement, avoiding equipment damage and safety hazards. During operation, the operator does not need to constantly monitor the position of the movable base 313 and the second movable frame 400; they only need to ensure they move within the working area, greatly improving operational convenience and safety.

[0046] Further, please see Figure 3 The hot melt arm 512 has a base 514 and a first support arm 515 that can rotate based on the base 514; a second support arm 516 that can rotate based on the first support arm 515 is provided on the first support arm 515; the hot melt gun 513 is disposed on the second support arm 516.

[0047] Operators can precisely adjust the angle and position of the hot melt gun 513 by controlling the rotation of the base 514 of the hot melt arm 512, as well as the rotation of the first arm 515 and the second arm 516. This multi-degree-of-freedom design allows the hot melt gun 513 to reach any position within the working area, meeting the operational needs of complex working scenarios.

[0048] In use, operators only need to control the hot melt arm 512 base 514, the first arm 515, and the second arm 516 according to actual needs, and the system will automatically adjust them to the specified positions and angles, greatly improving the flexibility and accuracy of operation. At the same time, this design also makes the hot melt process more stable and reliable, ensuring the consistency and quality of the hot melt effect.

[0049] When the control system is unable to perform precise operation, the detachable hot melt gun 513 can be removed for manual operation to adapt to different work requirements and achieve the removal of pins.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for removing pins by high-pressure oxygen heat fusion, comprising a support frame (100) and a heat fusion platform (200) movable based on said support frame (100); characterized in that: The hot melt platform (200) includes a first movable frame (300) and a second movable frame (400) that can move based on the first movable frame (300); The bottom of the second movable frame (400) is provided with a hot melt assembly (500), the raw material tank (511) of the hot melt assembly (500) is set on the hot melt platform (200) and provides raw materials to the hot melt assembly (500); The hot melt assembly (500) includes a hot melt arm (512) with at least three degrees of freedom, and the end of the hot melt arm (512) is provided with a hot melt gun (513); the hot melt gun (513) is detachably connected to the hot melt arm (512).

2. A high pressure oxygen heat staked pin extraction device according to claim 1, wherein, The top of the support frame (100) is provided with a first set of guide rails (111), and the hot melt platform (200) is connected to the support frame (100) through a movable slider (112); A first transmission rack (113) is also provided between the first set of guide rails (111).

3. A high pressure oxygen heat staked pin extraction device according to claim 2, wherein, The hot melt platform (200) is also equipped with a first motor (114), which is connected to the first transmission rack (113) through a first transmission gear on the output shaft to drive the hot melt platform (200).

4. A high pressure oxygen heat staked pin extraction device according to claim 2, wherein, The bottom of the hot melt platform (200) is also provided with at least one set of auxiliary wheels (115), which are in contact with the top of the support frame (100) and can slide on the top of the support frame (100).

5. A high pressure oxygen heat staked pin extraction device according to claim 1, wherein, The top of the support frame (100) is provided with a first anti-collision member (116) and a second anti-collision member (117) at both ends; The first anti-collision component (116) includes multiple buffer layers, and an air chamber is provided between each pair of buffer layers; The second anti-collision member (117) and the first anti-collision member (116) are configured in the same way.

6. A high pressure oxygen heat staked pin extraction device according to claim 1, wherein, The first movable frame (300) is provided with a second set of guide rails (311) and a second transmission rack (312) between the second set of guide rails (311); The first movable frame (300) is provided with a movable base (313) that can move based on the first movable frame (300).

7. A high pressure oxygen heat staked pin extraction device according to claim 6, wherein, The second movable frame (400) is disposed on the movable base (313); The second movable frame (400) is also provided with a third set of guide rails (411) and a third transmission rack (412) disposed between the third set of guide rails (411).

8. A high pressure oxygen heat staked pin extraction device according to claim 7, wherein, The movable base (313) is equipped with a second motor (314) and a third motor (315); The second transmission gear on the output shaft of the second motor (314) is connected to the second transmission rack (312) to drive the moving seat (313) to move; The third transmission gear on the output shaft of the third motor (315) is connected to the third transmission rack (412) to drive the second moving frame (400) to move.

9. A high pressure oxygen heat staked pin extraction device according to claim 6, wherein, Limit sensors (316) are provided at both ends of the first movable frame (300) and the second movable frame (400); When the limit sensor (316) is triggered, the movable seat (313) and the second movable frame (400) stop moving.

10. The high pressure oxygen heat staked pin extraction device of claim 1, wherein, The hot melt arm (512) is provided with a base (514) and a first arm (515) that can rotate based on the base (514); The first arm (515) is provided with a second arm (516) that can rotate based on the first arm (515); The hot melt gun (513) is mounted on the second arm (516).

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