Coal mine fully-mechanized mining hydraulic support protection device

Abstract

The utility model discloses a protective device for a fully-mechanized coal mining hydraulic support of a coal mine. The protective device comprises a protective net mechanism hung at the bottom of a top beam of the hydraulic support. The protective net mechanism comprises an upper hanging beam, and the bottom of the upper hanging beam is fixedly connected with a blocking net assembly. The blocking net assembly comprises a central framework net fixedly connected to the bottom of the upper suspended beam, and spring buffering nets are fixedly connected to the inner side and the outer side of the central framework net correspondingly. The spring buffer net comprises a plurality of longitudinal springs fixedly connected to the bottom of the upper suspended beam, and the longitudinal springs are vertically staggered with a plurality of transverse springs which are arranged at intervals up and down; fixed mounting frames are hinged to the two sides of the top of the upper hanging beam correspondingly and fixedly mounted at the bottom of a top beam of the hydraulic support. A lower hanging beam is arranged below the upper hanging beam, and the bottom of the center framework net and the bottom of the spring buffering net are fixedly connected to the lower hanging beam. Flying waste rock is effectively buffered and blocked through the device, and the hydraulic support is protected.

Description

Technical Field

[0001] The utility model belongs to the technical field of comprehensive mining hydraulic support protection, and particularly relates to a protection device for a coal mine comprehensive mining hydraulic support. Background Technique

[0002] During the coal mining process, such as in comprehensive mining, a certain number of comprehensive mining hydraulic supports are required. The main structure of the comprehensive mining hydraulic support includes a rib protection plate for supporting on the roadway rib, a roof beam plate for supporting on the roadway roof, and a driving structure such as a hydraulic cylinder for pushing the rib protection plate, roof beam plate and other support structures. During the coal mining process through the comprehensive mining hydraulic support, the roadway in the coal mining operation area is supported, thereby improving the safety of the coal mining operation. Moreover, during the coal mining process, the shearer is continuously moved along the comprehensive mining face by the comprehensive mining hydraulic support, thereby completing the comprehensive mining process.

[0003] During the coal mining process, in order to protect the comprehensive mining hydraulic support, specifically because the environment in the coal mining operation area is complex, especially during operations such as blasting and coal cutting, a large amount of coal gangue is easily generated, and the flying coal gangue impacts on the comprehensive mining hydraulic support, causing relatively great damage to the comprehensive mining hydraulic support. Especially for the large-mass and high-speed flying gangue, when it impacts on the hydraulic cylinder of the mining hydraulic support, the damage to the hydraulic cylinder is very large. Especially when it impacts on the plunger rod of the hydraulic cylinder, the plunger rod deforms, and after the telescopic plunger rod deforms, it is extremely easy to cause the sealing performance between it and the cylinder barrel to decrease.

[0004] Therefore, in order to avoid the damage of the flying gangue to the comprehensive mining equipment, currently, a flexible retaining net is mostly installed on the outside of the hydraulic cylinder on the comprehensive mining hydraulic support. However, since the retaining net is too close to the hydraulic cylinder, after the flying gangue impacts, it is still easy to impact on the hydraulic cylinder, especially for large-sized gangue.

[0005] Secondly, since the retaining net is a single-layer structure, after being impacted by the gangue for a long time, holes are very likely to be formed on the retaining net, resulting in the loss of the protection effect.

[0006] Finally, the service life of this flexible retaining net is too short, and the replacement frequency is relatively high, resulting in a high protection cost. Content of the Utility Model

[0007] Based on the above background, the purpose of the utility model is to provide a protection device for a coal mine comprehensive mining hydraulic support.

[0008] To achieve the above purpose, the utility model adopts the following technical solutions:

[0009] A protection device for a coal mine comprehensive mining hydraulic support, including a protection net mechanism hung at the bottom position of the top beam of the hydraulic support;

[0010] During the comprehensive mining process, the cut coal gangue is prevented from impacting on the hydraulic cylinder through the protection net mechanism;

[0011] The protective net mechanism includes an upper hanging beam, and a net blocking component is fixedly connected to the bottom of the upper hanging beam;

[0012] The net blocking component includes a central skeleton net fixedly connected to the bottom of the upper hanging beam, and spring buffer nets are fixedly connected to the inner and outer sides of the central skeleton net respectively;

[0013] The spring buffer net includes a plurality of longitudinal springs fixedly connected to the bottom position of the upper hanging beam, and a plurality of transverse springs are vertically staggered with the longitudinal springs at intervals up and down;

[0014] Fixed mounting brackets are respectively hinged to both sides of the top of the upper hanging beam, and the fixed mounting brackets are fixedly mounted at the bottom of the top beam of the hydraulic support;

[0015] A lower hanging beam is arranged below the upper hanging beam, and the bottom of the central skeleton net and the spring buffer net are fixedly connected to the lower hanging beam.

[0016] Preferably, convex portions vertically arranged upwards are integrally formed at both ends of the top of the upper hanging beam, a pin shaft is fixedly connected to the convex portion, and the pin shaft is hinged to the fixed mounting bracket.

[0017] Preferably, the central skeleton net includes a plurality of longitudinal net rods arranged at intervals left and right, and a plurality of horizontal net rods are staggered between the longitudinal net rods at intervals up and down;

[0018] The top and bottom of the longitudinal net rods are respectively fixedly connected to the upper hanging beam and the lower hanging beam.

[0019] Preferably, the intersecting positions of the longitudinal net rods and the horizontal net rods are fixedly welded.

[0020] Preferably, the intersecting positions of the longitudinal springs and the transverse springs are fixedly tied by steel wires.

[0021] Preferably, the fully-mechanized coal mining hydraulic support protection device further includes a stop rod mechanism;

[0022] When the rolling gangue impacts the protective net mechanism, the hinged protective net mechanism blocks the gangue. Under the impact force, the protective net mechanism flips, and the stop rod mechanism blocks the excessive flipping angle of the protective net mechanism.

[0023] Preferably, the stop rod mechanism includes a cross beam column fixedly connected between the front side walls of the fixed mounting brackets;

[0024] A stop rod blocking the front side position of the protective net mechanism is assembled and connected between the cross beam columns.

[0025] Preferably, the stop rod includes a screw rod portion threadedly connected to the cross beam column, and a long stop rod portion is integrally formed at the bottom of the screw rod portion.

[0026] Preferably, an installation screw rod is threadedly connected to the fixed mounting bracket, and the installation screw rod is threadedly fastened to the bottom of the top beam of the hydraulic support.

[0027] The utility model has the following beneficial effects:

[0028] 1. During the working process, when the flying gangue is large in size and has a large impact kinetic energy, at this time, the formed spring buffer net impacts the central skeleton net, and the impact mode is the impact between the nets. Therefore, the spring buffer net is further deformed to form a buffer. The function of the front spring buffer net is that when the gangue is fragmented, it passes through the mesh pores between the rear spring buffer net and the central skeleton net. At this time, under the protection of the front spring buffer net and the central skeleton net, the gangue is further blocked and protected.

[0029] Through the above method, effective multi-layer separation and protection of the hydraulic cylinder of the hydraulic support are realized. And through the structural design of the central skeleton net, the center is realized.

[0030] 2. During the working process, when the gangue impacts, at this time, the hinged protection net mechanism rotates, and the fixed stop rod mechanism forms a separation and protection under the action of multiple parallel stop rods. Through the separation effect, the rotation angle of the protection net mechanism is prevented from being too large, so as to avoid the protection net mechanism from hitting the hydraulic support. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0032] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present invention;

[0033] Figure 2 It is a schematic diagram of the structure of the protection net mechanism in the embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of the structure in which spring buffer nets are arranged on both the inner and outer sides of the central skeleton net in the embodiment of the present invention;

[0035] Figure 4 It is a schematic diagram of the structure in which the stop rod mechanism is fixedly connected to the fixed mounting bracket in the embodiment of the present invention;

[0036] Figure 5This is a schematic diagram of the planar structure in the embodiments of the present utility model.

[0037] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0041] Embodiment 1

[0042] As Figures 1-5 shown, a protection device for a fully-mechanized coal mining hydraulic support includes a protection net mechanism hung at the bottom of the top beam of the hydraulic support. By arranging and installing the protection net mechanism at the bottom of the top beam of the hydraulic support, during the fully-mechanized coal mining process, flying gangue impacts on the protection net mechanism. Since the protection net mechanism has a sufficient safety distance from the hydraulic cylinder, even if the gangue is fragmented, it is not easy to impact components such as the hydraulic cylinder of the fully-mechanized coal mining hydraulic support under the blockage of the protection net mechanism.

[0043] The specific structure of the protection net mechanism is as follows:

[0044] The protection net mechanism includes an upper hanging beam 1, and a net-blocking component is fixedly connected to the bottom of the upper hanging beam 1; the net-blocking component includes a central skeleton net 5 fixedly connected to the bottom of the upper hanging beam 1, and spring buffer nets 3 are respectively fixedly connected to the inner and outer sides of the central skeleton net 5.

[0045] Specifically, the spring buffer net 3 includes a number of longitudinal springs 32 fixedly connected to the bottom of the upper hanging beam 1, and a number of transverse springs 31 are vertically staggered and arranged at intervals up and down with respect to the longitudinal springs 32; according to the existing net tying method, at the staggered positions of the longitudinal springs 32 and the transverse springs 31, they are fastened by steel wire ropes.

[0046] During the working process, first, the flying gangue impacts on the outer side (rear side) of the spring buffer net 3. At this time, since there is a spacing between the spring buffer net 3 and the central skeleton net 5, the spring buffer net 3 deforms. And the spring buffer net 3 is formed by a spring structure, so the amount of deformation is relatively large. Therefore, a large buffering force is formed by the deformation of the spring (the buffering of the impact force by the spring deformation is a conventional application of the inherent property of the spring), and then the impact of the flying gangue is initially buffered.

[0047] When the flying gangue is large in size and has a large impact kinetic energy, at this time, the formed spring buffer net 3 impacts on the central skeleton net 5, and the impact mode is the impact between the nets. Therefore, further buffering is achieved by the further deformation of the spring buffer net 3. The function of the spring buffer net 3 on the front side is that when the gangue is fragmented, it passes through the mesh pores between the rear spring buffer net 3 and the central skeleton net 5. At this time, under the protection of the front spring buffer net 3 and the central skeleton net 5, the gangue is further blocked and protected.

[0048] Through the above method, effective multi-layer separation and lower protection of the hydraulic cylinder of the hydraulic support are achieved. And through the structural design of the central skeleton net 5, protection of the central skeleton net 5 in the central part is realized, and the central skeleton net 5 functions to block large and high-kinetic-energy gangue.

[0049] In order to increase the stability of the net structure, fixed mounting frames 11 are respectively hinged on both sides of the top of the upper hanging beam 1, and the fixed mounting frames 11 are fixedly installed at the bottom of the top beam of the hydraulic support; a lower hanging beam 2 is arranged below the upper hanging beam 1, and the bottoms of the central skeleton net 5 and the spring buffer net 3 are fixedly connected to the lower hanging beam 2.

[0050] Meanwhile, the central skeleton net 5 includes a number of longitudinal net bars 51 arranged at intervals left and right, and a number of horizontal net bars 52 are staggered between the longitudinal net bars 51 and arranged at intervals up and down; the tops and bottoms of the longitudinal net bars 51 are respectively fixedly connected to the upper hanging beam 1 and the lower hanging beam 2. The staggered positions of the longitudinal net bars 51 and the horizontal net bars 52 are welded and fixed.

[0051] Embodiment 2

[0052] As Figures 1-5As shown in the figure, on the basis of the structure of Embodiment 1, convex parts vertically arranged upward are integrally formed at both ends of the top of the upper hanging beam 1. A pin shaft is fixedly connected to the convex part, and the pin shaft is hinged to the fixed mounting bracket 11. During the working process through the hinged manner, when the gangue impacts, by using the flipping action of the protective net mechanism, the impact damage of the flying gangue to the net structure can be further reduced. During the flipping process, a "dodging" method for the gangue is formed, thereby further protecting the net structure and increasing its service life.

[0053] Meanwhile, in order to prevent the protective net mechanism from flipping too much and causing the gangue to impact the hydraulic support, the above-mentioned comprehensive coal mining hydraulic support protection device for coal mines further includes a stop rod mechanism 4.

[0054] Specifically, when the rolling gangue impacts the protective net mechanism, the hinged protective net mechanism blocks the gangue. Under the impact force, the protective net mechanism flips, and the stop rod mechanism 4 blocks the excessive flipping angle of the protective net mechanism.

[0055] The specific structure of the stop rod mechanism 4 is as follows: The stop rod mechanism 4 includes a cross beam column 42 fixedly connected between the front side walls of the fixed mounting bracket 11 (convex seats 41 are respectively welded on the front side walls of the fixed mounting bracket 11, and the cross beam column 42 is fixed on the convex seats 41); a stop rod is assembled and connected between the cross beam columns 42 and is located in front of the protective net mechanism. The bottom of the stop rod extends to be close to the lower end of the protective net mechanism and maintains a certain gap from the lower hanging beam.

[0056] The stop rod includes a screw rod part 431 threadedly connected to the cross beam column 42, and a long stop rod part 43 is integrally formed at the bottom of the screw rod part 431. An installation screw rod is threadedly connected to the fixed mounting bracket 11, and the installation screw rod is threadedly fastened to the bottom of the top beam of the hydraulic support.

[0057] During the working process, when the gangue impacts, at this time, the hinged protective net mechanism rotates, and the stop rod mechanism 4 with a fixed installation method forms a blocking protection under the action of multiple parallel arranged stop rods. Through the blocking action, the excessive rotation angle of the protective net mechanism is avoided, so as to prevent the protective net mechanism from impacting the hydraulic support.

[0058] Certainly, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the essence of the present invention should also fall within the protection scope of the present invention.

Claims

1. A comprehensive mining hydraulic support protection device for coal mines, characterized in that, It includes a protective net mechanism hung at the bottom position of the hydraulic support roof beam; During the fully mechanized coal mining process, the cut coal gangue is prevented from hitting the hydraulic cylinder through the protective net mechanism; The protective net mechanism includes an upper hanging beam, and a net blocking assembly is fixedly connected to the bottom of the upper hanging beam; The net blocking assembly includes a central skeleton net fixedly connected to the bottom of the upper hanging beam, and spring buffer nets are respectively fixedly connected to the inner and outer sides of the central skeleton net; The spring buffer net includes a number of longitudinal springs fixedly connected to the bottom position of the upper hanging beam, and a number of transverse springs are vertically staggered and arranged at intervals up and down with the longitudinal springs; Fixed mounting frames are respectively hinged on both sides of the top of the upper hanging beam, and the fixed mounting frames are fixedly installed at the bottom of the hydraulic support roof beam; A lower hanging beam is arranged below the upper hanging beam, and the bottom of the central skeleton net and the spring buffer net are fixedly connected to the lower hanging beam; 2. The coal mine fully-mechanized mining hydraulic support protection device according to claim 1, wherein At both ends of the top of the upper hanging beam, convex portions vertically arranged upward are integrally formed, and pin shafts are fixedly connected to the convex portions, and the pin shafts are hinged on the fixed mounting frames; 3. The fully-mechanized coal mining hydraulic support protection device according to claim 1, characterized in that, The central skeleton net includes a number of longitudinal net bars arranged at intervals left and right, and a number of horizontal net bars are staggered between the longitudinal net bars and arranged at intervals up and down; The top and bottom of the longitudinal net bars are respectively fixedly connected to the upper hanging beam and the lower hanging beam; 4. The coal mine fully-mechanized mining hydraulic support protection device according to claim 3, characterized in that, The intersection positions of the longitudinal net bars and the horizontal net bars are fixedly welded; 5. The coal mine fully-mechanized mining hydraulic support protection device according to claim 1, characterized in that The intersection positions of the longitudinal springs and the transverse springs are fixedly tied by steel wires; 6. The coal mine fully-mechanized mining hydraulic support protection device according to claim 1, characterized in that The coal mine fully mechanized hydraulic support protection device further includes a stop rod mechanism; When the rolling gangue hits the protective net mechanism, the hinged protective net mechanism blocks the gangue. Under the impact force, the protective net mechanism flips, and the stop rod mechanism blocks the excessive flipping angle of the protective net mechanism; 7. The fully-mechanized coal mining hydraulic support protection device according to claim 6, characterized in that, The stop rod mechanism includes a cross beam column fixedly connected between the front side walls of the fixed mounting frames; A stop rod blocking the front side position of the protective net mechanism is assembled and connected between the cross beam columns; 8. The fully-mechanized coal mining hydraulic support protection device according to claim 7, wherein The stop rod includes a screw rod portion threadedly connected to the cross beam column, and a long stop rod portion is integrally formed at the bottom of the screw rod portion; 9. The coal mine fully-mechanized mining hydraulic support protection device according to claim 1, characterized in that, An installation screw rod is threadedly connected to the fixed mounting frame, and the installation screw rod is threadedly fastened to the bottom of the hydraulic support roof beam;

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