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A hydraulic prop with constant force energy absorbing and buffering function

A hydraulic prop and force-fixing technology, used in props/supports, mining equipment, earth-moving drilling, etc.

Active Publication Date: 2017-05-17
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, it is necessary to design a new type of hydraulic prop to make up for the weak impact resistance of existing hydraulic props, thereby improving the safety factor of hydraulic props and their supporting systems

Method used

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  • A hydraulic prop with constant force energy absorbing and buffering function
  • A hydraulic prop with constant force energy absorbing and buffering function
  • A hydraulic prop with constant force energy absorbing and buffering function

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Experimental program
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Embodiment Construction

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0020] like Figure 1~6 As shown, a hydraulic prop with constant force energy absorbing and buffering function includes a main part of the prop, and the main part of the prop includes a live post 16, a cylinder body 17 and a safety valve, and the live post 16 is installed in the cylinder body 17, The safety valve is located outside the cylinder body 17 and communicates with the inside of the cylinder body 17; its characteristic is that a fixed-force energy-absorbing buffer mechanism is arranged at the end of the live column 16 of the main body of the column.

[0021] The fixed-force energy-absorbing buffer mechanism part includes an energy-absorbing section and a constant-force section, the energy-absorbing section includes a terminal 1, an outer sleeve 2, an energy-absorbing block 3 and a pressure plate 4, and the fixed-force section...

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Abstract

A hydraulic prop having an anchoring force energy-absorbing buffering function comprises a prop main body part. An anchoring force energy-absorbing buffering mechanism part is arranged at the end of a movable column of the prop main body part, so as to overcome the shortcoming that an existing hydraulic prop is weak in impact resistance. When the hydraulic prop is subjected to impact of an external load and when the loading force is not enough to break open a clamping pin in an anchoring force supporting state, the impact load can be resisted through the rigid supporting of the clamping pin; and when the loading force exceeds the anchoring force supporting force of the clamping pin, the clamping pin cannot support an outer sleeve any longer and is obliged to retract towards an inner sleeve. While the clamping pin retracts, an energy-absorbing block is compressed in first time to absorb energy, precious buffering time is provided for the opening of a hydraulic prop safety valve, the safety valve is prevented from being damaged in an instant by huge impact force, the occurrence probability of cylinder explosion, sealing ring crushing and prop instability and bending is reduced, the impact resistance of the hydraulic prop is improved, and the safety factor of the hydraulic prop and a supporting system where the hydraulic prop is located is improved.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety support, in particular to a hydraulic prop with the function of constant force, energy absorption and buffering. Background technique [0002] Hydraulic props, because of their strong supporting capacity and self-regulating load function, are widely used in current coal mine support. They are commonly used in heavy support equipment such as fully mechanized mining hydraulic supports, stack supports and self-moving hydraulic supports. Among them, some single hydraulic props are also used. The structure of the hydraulic prop is simple and the operation method is simple. It only needs to inject liquid from the outside to achieve a high initial support force. When the load drops below the threshold, the safety valve will automatically close, in this way to realize the function of self-regulating load. Therefore, hydraulic props have strong adaptability under complex and harsh coal mine supp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D15/44E21D15/51E21D15/50
Inventor 肖永惠潘一山马箫李丽萍
Owner LIAONING TECHNICAL UNIVERSITY
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