A hydraulic support pipeline U-shaped pin auxiliary dismantling device

Abstract

The application provides a hydraulic support pipeline U-shaped pin auxiliary removal device, which comprises a handle, a wedge-shaped part, the wedge-shaped part being arranged at the end of the handle and being a hollow structure, a plurality of grooves being arranged on the wedge-shaped part, an adjustable length lever arm being arranged at the end of the handle, the lever arm being connected with the handle through a rotating shaft, and a plurality of fixing holes being arranged at different positions on the lever arm, and the length of the lever arm being fixed by inserting a pin. The handle end of the hydraulic support pipeline U-shaped pin auxiliary removal device provided by the application is provided with an adjustable length lever arm, the lever arm is connected through a rotating shaft and can be fixed in length by using a pin in different fixing holes. According to the lever principle, the force arm can be adjusted as required, the knocking force is increased, the U-shaped pin is removed more easily, and the labor intensity of workers is reduced. The wedge-shaped part is a hollow structure with a width of 30-50 mm, which can not only reduce the weight of the device and facilitate the operation of workers, but also ensure a certain structural strength and meet the force requirement during removal.

Description

Technical Field

[0001] This application relates to the field of coal mining technology, and in particular to a device for assisting in the removal of U-shaped pins in hydraulic support pipelines. Background Technology

[0002] In coal mine production operations, one of the key aspects of ensuring the normal continuity of the mine is the installation and withdrawal of the working face, and the withdrawal of hydraulic supports plays a central role in this process. As an important piece of equipment for supporting the roof and maintaining the safety of the working space underground, hydraulic supports must be safely and efficiently withdrawn after the working face is mined out, so that they can be reused in new mining areas or processed later.

[0003] During the retraction of hydraulic supports, the removal of pipeline connectors is particularly complex and crucial. In the technical scenario of hydraulic support retraction, workers need to remove the U-shaped pins connecting the pipelines between supports to smoothly separate the various support components. Due to the complex underground environment, such as humidity, dust, and corrosion from long-term use of the supports, U-shaped pins are often difficult to remove properly. Traditional removal methods often rely on manual force using tools such as hammers, which is not only inefficient but also poses safety hazards, easily damaging the supports and pipelines. Especially when dealing with connectors like U-shaped pins, their compact structure and strong connections make manual removal even more difficult, often requiring significant time and manpower. Therefore, developing an auxiliary device that can efficiently and safely remove U-shaped pins from hydraulic support pipelines is of paramount importance.

[0004] Currently, there are two main traditional methods for removing U-pins from hydraulic support pipelines that are difficult to remove normally. One method is to use a sledgehammer, where workers directly strike the U-pin with a sledgehammer in an attempt to loosen and remove it. The other method is to use a chain hoist to pull it outwards, removing the U-pin through the hoist's traction. However, both methods have significant limitations. While using a sledgehammer can generate sufficient impact force, its uncontrollability and randomness greatly increase the operational risk and can easily lead to safety accidents. While chain hoists are easy to operate, their force output is often limited in the complex downhole environment, and damage to the U-pin is difficult to avoid.

[0005] From a safety perspective, during sledgehammer strikes, the U-pin may suddenly pop out due to uneven force, causing injury to the operator. Similarly, if the U-pin suddenly loosens while the chain hoist is being used, it can easily lead to falls and other accidents, posing a high safety risk. Both methods are significantly affected by factors such as the degree of corrosion and the installation location of the U-pin. For severely corroded or uniquely positioned U-pins, the removal effect is poor, making it impossible to complete the removal task stably and reliably. In terms of labor intensity, both sledgehammer strikes and chain hoist operation require workers to expend considerable physical strength. Prolonged work can lead to physical and mental fatigue, reducing work efficiency and increasing the likelihood of other safety accidents caused by fatigue, seriously impacting the company's profitability and safe production. Utility Model Content

[0006] This application provides an auxiliary device for removing U-shaped pins in hydraulic support pipelines, which solves the problem that U-shaped pins in hydraulic support pipelines are difficult to remove normally, and that existing removal methods are ineffective for U-shaped pins that are severely corroded or located in special positions, and cannot reliably complete the removal task.

[0007] This application provides a device for assisting in the removal of U-shaped pins in hydraulic support pipelines, comprising:

[0008] handle;

[0009] A wedge-shaped part is provided at the end of the handle. The wedge-shaped part has a hollow structure with a width of 30-50 mm. The wedge-shaped part has multiple grooves.

[0010] An adjustable lever arm is provided at the end of the handle. The lever arm is connected to the handle via a pivot, and multiple fixing holes at different positions are provided on the lever arm. The length of the lever arm is fixed by inserting pins.

[0011] In some possible implementations, the handle length is 30–50 cm.

[0012] In some possible implementations, the number of grooves is 3 to 5.

[0013] In some possible implementations, the groove width is 8–25 mm.

[0014] In some possible implementations, the groove depth is 3–8 mm.

[0015] In some possible implementations, a positioning head is provided at the front end of the wedge-shaped portion, and the positioning head is conical.

[0016] As described above, this application provides a hydraulic support pipeline U-pin auxiliary removal device, comprising: a handle; a wedge-shaped part, the wedge-shaped part being a hollow structure with a width of 30-50mm; the wedge-shaped part having multiple grooves; and an adjustable-length lever arm at the end of the handle, the lever arm being connected to the handle via a pivot, and having multiple fixing holes at different positions on the lever arm, the length of the lever arm being fixed by inserting a pin. The hydraulic support pipeline U-pin auxiliary removal device provided in this application has an adjustable-length lever arm at the end of the handle, connected via a pivot, and its length can be fixed using pins in different fixing holes. Based on the lever principle, the lever arm can be adjusted as needed to increase the striking force, making the removal of the U-pin easier and reducing the labor intensity of workers. The hollow structure of the wedge-shaped part, with a width of 30-50mm, reduces the weight of the device, making it easy for workers to hold and operate, while ensuring sufficient structural strength to meet the force requirements during removal. The wedge-shaped part has multiple grooves. During the dismantling process, if the U-shaped pin is pushed out and a spring breaks, it can fall into the groove, which can play a buffering role, prevent the U-shaped pin from flying out and injuring people, and improve the safety of the operation. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the hydraulic support pipeline U-shaped pin auxiliary removal device provided in the embodiments of this application.

[0019] Illustration: 1-Handle; 2-Wedge-shaped part; 21-Groove. Detailed Implementation

[0020] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application as detailed in the claims.

[0021] In coal mine production operations, one of the key aspects of ensuring the normal continuity of the mine is the installation and withdrawal of the working face, and the withdrawal of hydraulic supports plays a central role in this process. As an important piece of equipment for supporting the roof and maintaining the safety of the working space underground, hydraulic supports must be safely and efficiently withdrawn after the working face is mined out, so that they can be reused in new mining areas or processed later.

[0022] During the retraction of hydraulic supports, the removal of pipeline connectors is particularly complex and crucial. In the technical scenario of hydraulic support retraction, workers need to remove the U-shaped pins connecting the pipelines between supports to smoothly separate the various support components. Due to the complex underground environment, such as humidity, dust, and corrosion from long-term use of the supports, U-shaped pins are often difficult to remove properly. Traditional removal methods often rely on manual force using tools such as hammers, which is not only inefficient but also poses safety hazards, easily damaging the supports and pipelines. Especially when dealing with connectors like U-shaped pins, their compact structure and strong connections make manual removal even more difficult, often requiring significant time and manpower. Therefore, developing an auxiliary device that can efficiently and safely remove U-shaped pins from hydraulic support pipelines is of paramount importance.

[0023] Currently, there are two main traditional methods for removing U-pins from hydraulic support pipelines that are difficult to remove normally. One method is to use a sledgehammer, where workers directly strike the U-pin with a sledgehammer in an attempt to loosen and remove it. The other method is to use a chain hoist to pull it outwards, removing the U-pin through the hoist's traction. However, both methods have significant limitations. While using a sledgehammer can generate sufficient impact force, its uncontrollability and randomness greatly increase the operational risk and can easily lead to safety accidents. While chain hoists are easy to operate, their force output is often limited in the complex downhole environment, and damage to the U-pin is difficult to avoid.

[0024] From a safety perspective, during sledgehammer strikes, the U-pin may suddenly pop out due to uneven force, causing injury to the operator. Similarly, if the U-pin suddenly loosens while the chain hoist is being used, it can easily lead to falls and other accidents, posing a high safety risk. Both methods are significantly affected by factors such as the degree of corrosion and the installation location of the U-pin. For severely corroded or uniquely positioned U-pins, the removal effect is poor, making it impossible to complete the removal task stably and reliably. In terms of labor intensity, both sledgehammer strikes and chain hoist operation require workers to expend considerable physical strength. Prolonged work can lead to physical and mental fatigue, reducing work efficiency and increasing the likelihood of other safety accidents caused by fatigue, seriously impacting the company's profitability and safe production.

[0025] Therefore, to address the problem of the difficulty in properly removing U-pins from hydraulic support pipelines, and the fact that existing removal methods are ineffective for severely corroded or strategically located U-pins, failing to reliably and stably complete the removal task, such as... Figure 1 As shown, this application provides a device for assisting in the removal of U-shaped pins in hydraulic support pipelines.

[0026] The hydraulic support pipeline U-pin auxiliary removal device provided in this application includes:

[0027] Handle 1;

[0028] A wedge-shaped part 2 is provided at the end of the handle 1. The wedge-shaped part 2 has a hollow structure with a width of 30-50 mm. The wedge-shaped part 2 has a plurality of grooves 21.

[0029] An adjustable lever arm is provided at the end of the handle 1. The lever arm is connected to the handle 1 via a pivot, and multiple fixing holes at different positions are provided on the lever arm. The length of the lever arm is fixed by inserting pins.

[0030] The worker holds handle 1 and aligns the groove of wedge 2 with the U-shaped pin of the hydraulic support pipeline. Because wedge 2 is hollow and has a groove 21, it better fits the position and shape of the U-shaped pin, facilitating positioning before dismantling. The worker then uses a sledgehammer to strike handle 1 or the lever arm (depending on ease of operation). Since handle 1 has an adjustable lever arm, based on the lever principle, adjusting the length of the lever arm (i.e., adjusting the lever arm) increases the striking force under the same force, allowing the wedge to insert sufficiently into the gap of the U-shaped pin.

[0031] Under the impact force, the wedge-shaped part 2 gradually inserts into the gap between the U-shaped pin and the pipeline connection, pushing the U-shaped pin out. During this process, the hollow structure of the wedge-shaped part 2 helps reduce the overall weight, facilitating worker operation, and also optimizes the stress distribution to some extent, preventing excessive local stress in the device. When the U-shaped pin is pushed out, it may spring back; the multiple grooves 21 on the wedge-shaped part 2 act as a buffer, causing the U-shaped pin to fall into the grooves 21 when it springs back, reducing the risk of it flying out and ensuring the safety of the workers, thus completing the removal of the U-shaped pin.

[0032] In some embodiments, the handle 1 is 30-50cm long.

[0033] The length of handle 1 needs to ensure that it can effectively transmit force when striking the wedge 2, allowing the wedge 2 to smoothly insert into the U-pin gap and push out the U-pin. If handle 1 is too short, the transmitted force may be insufficient; if it is too long, the force will be dispersed, affecting the striking effect. Actual testing shows that for common hydraulic support pipeline U-pin removal operations, a handle length of 30-50 cm can effectively transmit the striking force to the wedge, meeting the removal requirements.

[0034] The wedge-shaped part 2 has grooves 21 engraved on both sides at different positions, which can provide a certain degree of buffering for the U-shaped pin, prevent the U-shaped pin from snapping, and improve the safety factor of on-site workers.

[0035] In some embodiments, the number of grooves 21 is 3 to 5.

[0036] From the perspective of buffering the impact of U-shaped pin breakage, a larger number of grooves 21 can provide more buffering opportunities, but too many will weaken the structural strength of the wedge-shaped part 2. For common hydraulic support pipeline U-shaped pins, 3-5 grooves can be set. If the U-shaped pin is larger and the impact force during removal is large, 5 grooves can be set; if the size is smaller and the impact force is small, 3 grooves 21 are sufficient, evenly distributed on both sides of the wedge-shaped part.

[0037] In some embodiments, the width of the groove 21 is 8 to 25 mm.

[0038] The width of groove 21 must match the diameter of the U-pin to ensure effective contact and cushioning. Common U-pin diameters are mostly between 10-30 mm, and the width of groove 21 can be set to 8-25 mm. For smaller U-pin diameters, the width of groove 21 is 8-15 mm; for larger diameters, it is 15-25 mm, ensuring that the U-pin can fall into groove 21 for cushioning when it is ejected.

[0039] In some embodiments, the groove 21 has a depth of 3 to 8 mm.

[0040] The depth of groove 21 affects the cushioning effect and the structure of wedge 2. If the depth is too shallow, the cushioning effect is weak; if it is too deep, it will weaken the strength of wedge 2. Generally, a groove depth of 3-8 mm is suitable. If the risk of U-shaped pin ejection is high during disassembly, the depth should be set to 5-8 mm; if the risk is low, 3-5 mm is suitable, balancing cushioning and structural strength.

[0041] In some embodiments, a positioning head is provided at the front end of the wedge-shaped part 2, and the positioning head is conical.

[0042] The conical positioning head has a fine tip, allowing for easy and precise alignment with the gaps in the U-pins of the hydraulic support pipeline. This quickly locates the removal leverage point, improving positioning efficiency and accuracy during installation and operation, reducing multiple adjustments due to inaccurate positioning, and saving removal time. The conical shape also provides excellent guidance, allowing the positioning head to be inserted more smoothly into the narrow gap between the U-pin and the pipeline when the wedge-shaped part is struck, reducing insertion resistance and minimizing damage to the U-pin and surrounding components caused by difficulty in insertion.

[0043] When using the device, insert the foremost part of the wedge 2 into the gap of the U-shaped pin, and use a sledgehammer to strike the rear part of the wedge 2, so that the rear part of the wedge 2 gradually inserts into the gap of the U-shaped pin, pushing the U-shaped pin out.

[0044] As can be seen from the above embodiments, this application provides a hydraulic support pipeline U-pin auxiliary removal device, including: a handle; a wedge-shaped part, the wedge-shaped part being disposed at the end of the handle, the wedge-shaped part being a hollow structure with a width of 30-50mm; the wedge-shaped part having multiple grooves; and an adjustable-length lever arm being provided at the end of the handle, the lever arm being connected to the handle via a pivot, and having multiple fixing holes at different positions on the lever arm, the length of the lever arm being fixed by inserting a pin. The hydraulic support pipeline U-pin auxiliary removal device provided in this application has an adjustable-length lever arm at the end of the handle, connected via a pivot, and its length can be fixed using pins at different fixing holes. Based on the lever principle, the lever arm can be adjusted as needed to increase the striking force, making the removal of the U-pin easier and reducing the labor intensity of workers. The wedge-shaped part being a hollow structure with a width of 30-50mm not only reduces the weight of the device, making it easy for workers to hold and operate, but also ensures a certain structural strength to meet the force requirements during removal. The wedge-shaped part has multiple grooves. During the dismantling process, if the U-shaped pin is pushed out and a spring breaks, it can fall into the groove, which can play a buffering role, prevent the U-shaped pin from flying out and injuring people, and improve the safety of the operation.

[0045] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A device for assisting in the removal of U-shaped pins in hydraulic support pipelines, characterized in that, include: Handle (1); A wedge-shaped part (2) is provided at the end of the handle (1). The wedge-shaped part (2) is a hollow structure with a width of 30-50 mm. The wedge-shaped part (2) is provided with a plurality of grooves (21). An adjustable lever arm is provided at the end of the handle (1). The lever arm is connected to the handle (1) via a pivot, and multiple fixing holes at different positions are provided on the lever arm. The length of the lever arm is fixed by inserting a pin.

2. The hydraulic support pipeline U-shaped pin auxiliary dismantling device according to claim 1, characterized in that, The handle (1) is 30-50cm long.

3. The hydraulic support pipe U-pin auxiliary dismantling device according to claim 1, characterized in that, The number of grooves (21) is 3 to 5.

4. The hydraulic support pipeline U-shaped pin auxiliary dismantling device according to claim 1, characterized in that, The width of the groove (21) is 8 to 25 mm.

5. The hydraulic support pipeline U-pin auxiliary dismantling device according to claim 1, characterized in that, The groove (21) has a depth of 3 to 8 mm.

6. The hydraulic support pipeline U-pin auxiliary dismantling device according to claim 1, characterized in that, A positioning head is provided at the front end of the wedge-shaped part (2), and the positioning head is conical.

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