A flexible protective fence outside the closed wall of a coal mine tunnel

Abstract

The present invention provides a flexible protective fence outside the closed wall of a coal mine tunnel, comprising a plurality of brackets, with the tunnel exit side of the coal mine tunnel as the front side, each bracket is arranged in a rectangular tunnel outside the closed wall of the coal mine tunnel at intervals on the left and right, a flexible protective fence is arranged between two adjacent brackets, and each flexible protective fence is spliced ​​and blocked in turn on the left and right sides of the rectangular tunnel. The present invention is easy to store, simple to install as a whole, and quick to disassemble and assemble. The rectangular rope net is made of aramid material, which is fireproof, anti-static, corrosion-resistant, and recyclable for multiple uses.

Description

Technical Field

[0001] The invention belongs to the field of coal mine safety protection equipment, and in particular, relates to a flexible protective fence outside a closed wall of a coal mine tunnel. Background Art

[0002] In today's coal mine production process, safety is the top priority. According to the "Coal Mine Safety Regulations", a fence is set up on the outside of the tunnel's closed wall at a distance of no more than 2m from the tunnel exit to prevent people from mistakenly entering and causing safety accidents. However, there are still many problems that threaten the safety of life and property in the existing underground production environment. The connecting tunnel between the two parallel working surfaces needs to be blocked after being decommissioned, but there is still a space between the tunnel entrance and the blocking surface. The gas content in this space is high, and if people mistakenly enter, it may cause life-threatening danger. At present, the materials used to make fences are usually wooden strips, wire mesh, etc. At the same time, the process of making fences is complicated, labor-intensive, time-consuming and labor-intensive, and the wooden strips are not flame retardant, while the wire mesh is not corrosion-resistant, and they are not recyclable and reused. It cannot meet the existing coal mine production safety requirements. Summary of the invention

[0003] The purpose of the present invention is to provide a flexible protective fence on the outside of the closed wall of a coal mine tunnel. The present invention is easy to store, simple to install as a whole, and quick to disassemble and assemble. The rectangular rope net is made of aramid material, which is fireproof, anti-static, corrosion-resistant, and recyclable for multiple uses.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A flexible protective fence on the outside of a closed wall of a coal mine tunnel comprises a plurality of brackets, with the tunnel exit side of the coal mine tunnel as the front side, and each bracket is arranged at intervals on the left and right in a rectangular tunnel outside the closed wall of the coal mine tunnel, and a flexible protective fence is arranged between two adjacent brackets, and each flexible protective fence is spliced ​​on the left and right sides to seal the rectangular tunnel in sequence.

[0006] The bracket includes two vertically arranged telescopic rod groups, the two telescopic rod groups have the same structure and are symmetrically arranged up and down, the upper telescopic rod group includes a plug-in rod and a fixed tube, the plug-in rod is vertically plugged into the fixed tube, the upper end of the plug-in rod extends out of the upper end of the fixed tube, a locking bolt is installed on the upper side of the outer wall of the fixed tube, the inner end of the locking bolt extends into the fixed tube and presses on the outer wall of the plug-in rod, a fixed support is fixedly installed on the upper end of the plug-in rod, an anti-slip pad is arranged on the upper surface of the fixed support, a C-shaped tube horizontally arranged along the left and right directions is fixedly connected between the front side of the lower surface of the fixed support and the upper side of the front side of the outer wall of the plug-in rod, the C-shaped tube is transparent on the left and right and the open side faces the front and upper part, and a plurality of hooks are arranged at vertical intervals on the left and right sides of the outer wall of the fixed tube;

[0007] The front side of the lower outer wall of the upper fixed tube and the front side of the upper outer wall of the lower fixed tube are hinged by a hinge, and the rear side of the lower outer wall of the upper fixed tube and the rear side of the upper outer wall of the lower fixed tube are connected by a locking mechanism.

[0008] The fixing tube on the lower side includes two connecting tubes, which correspond to each other up and down. The outer circumference of the lower side of the upper connecting tube is provided with a first external thread, and the outer circumference of the upper side of the lower connecting tube is provided with a second external thread. The rotation directions of the first external thread and the second external thread are opposite. A threaded sleeve is connected between the two connecting tubes, and the inner circumference of the threaded sleeve is provided with an internal thread. The outer circumference of the lower side of the upper connecting tube is threadedly connected to the upper inner side of the threaded sleeve, and the outer circumference of the upper side of the lower connecting tube is threadedly connected to the lower inner side of the threaded sleeve. The front side of the outer wall of the lower end of the upper fixing tube and the front side of the outer wall of the upper end of the upper connecting tube are hinged by the hinge, and the rear side of the outer wall of the lower end of the upper fixing tube and the rear side of the outer wall of the upper end of the upper connecting tube are connected by the locking mechanism.

[0009] The flexible protective fence comprises a rectangular rope net, wherein the upper and lower sides of the rectangular rope net are both provided with cross tubes, and the left and right sides of the rectangular rope net are both connected with elastic ropes, the two cross tubes have the same structure and are symmetrically arranged up and down, the cross tubes are arranged horizontally in the left and right directions, and a pipe joint is integrally formed on the right end of the cross tube, and the outer diameter of the pipe joint is equal to the inner diameter of the cross tube, and a guide long hole is opened in the lower side wall of the upper cross tube in the left and right directions, and a guide long rod is fixedly arranged in the upper cross tube, and the outer diameter of the guide long rod is equal to the inner diameter of the cross tube, and a T-slot is opened on the lower side of the guide long rod in the left and right directions, which is open on the left, right and lower sides and larger on the top and smaller on the bottom, and the T-slot corresponds to the guide long hole up and down, and a plurality of T-slide blocks arranged at intervals on the left and right are matched and slidably arranged in the T-slot, and a compression spring embedded in the upper side of the T-slot is connected between two adjacent T-slide blocks, and the upper side of the rectangular rope net passes through the guide long hole and extends into the cross tube and is fixedly connected to the bottom of each T-slide block;

[0010] A clamping nail is fixedly connected to the front side of the outer wall of the pipe joint, and a long clamping hole with open left, front and rear sides is opened in the left and right directions on the front side of the left end pipe wall of the horizontal pipe, and a clamping groove with open upper side is provided on the right side of the bottom edge of the long clamping hole.

[0011] The rectangular rope net is made of aramid material, and the mesh of the rectangular rope net is diamond-shaped.

[0012] Using the above technical solution, a method for installing a flexible protective fence outside a closed wall of a coal mine tunnel specifically includes the following steps:

[0013] (1) Install the first bracket on the far left side of the rectangular tunnel outside the closed wall of the coal mine tunnel;

[0014] (2) Install the second bracket on the right side of the first bracket at a distance of one horizontal pipe;

[0015] (3) Install a flexible protective fence between the first bracket and the second bracket;

[0016] (4) Repeat steps (2) and (3) multiple times to splice multiple flexible protective fences until the rectangular tunnel is blocked.

[0017] The step (1) is specifically as follows: pull out the plug-in rod in the upper telescopic rod group of the first bracket to the longest pull-out position, tighten the locking bolt on the upper side to fix the plug-in rod in the upper telescopic rod group, support the ground with the lower fixed support, and make the lower anti-skid pad contact with the ground, lift the upper fixed tube, make the lower end of the upper fixed tube dock with the upper end of the lower fixed tube, and then buckle and fix the upper fixed tube with the lower fixed tube through the corresponding locking mechanism, pull out the plug-in rod in the lower telescopic rod group until the upper fixed support contacts the top of the rectangular tunnel, and the upper anti-skid pad contacts the top of the rectangular tunnel, and then rotate the threaded sleeve on the lower fixed tube to make the two connecting tubes move away from each other, increase the distance, and increase the overall length of the lower fixed tube, so that the lower anti-skid pad is pressed against the ground, and the upper anti-skid pad is pressed against the top of the rectangular tunnel, the first bracket is supported as a whole, and the installation of the first bracket is completed.

[0018] The step (2) is specifically as follows: pull out the plug-in rod in the upper telescopic rod group of the second bracket to the longest pull-out position, tighten the upper locking bolt to fix the plug-in rod in the upper telescopic rod group, support the lower fixed support on the ground and place it at the length of one horizontal tube to the right side of the first bracket, the lower anti-skid pad is in contact with the ground, lift the upper fixed tube, make the lower end of the upper fixed tube dock with the upper end of the lower fixed tube, and then buckle and fix the upper fixed tube with the lower fixed tube through the corresponding locking mechanism, pull out the plug-in rod in the lower telescopic rod group until the upper fixed support contacts the top of the rectangular tunnel, the upper anti-skid pad contacts the top of the rectangular tunnel, and then rotate the threaded sleeve on the lower fixed tube to make the two connecting tubes move away from each other, increase the distance, and increase the overall length of the lower fixed tube, so that the lower anti-skid pad is pressed against the ground, the upper anti-skid pad is pressed against the top of the rectangular tunnel, the second bracket is supported as a whole, and the installation of the second bracket is completed.

[0019] Step (3) is specifically as follows: insert the left end of the horizontal tube on the upper side of the rectangular rope net to the left corresponding to the right port of the C-shaped tube on the upper side of the first bracket, and then move it to the right so that the right end of the horizontal tube on the upper side of the rectangular rope net is correspondingly inserted into the left port of the C-shaped tube on the upper side of the second bracket, and then pull the horizontal tube on the lower side of the rectangular rope net downward to pull the rectangular rope net downward, and then insert the left end of the horizontal tube on the lower side of the rectangular rope net to the left corresponding to the right port of the C-shaped tube on the lower side of the first bracket, and then move it to the right so that the right end of the horizontal tube on the lower side of the rectangular rope net is correspondingly inserted into the left port of the C-shaped tube on the lower side of the second bracket, and finally fix the elastic rope on the left side of the rectangular rope net to the hooks on the first bracket, and fix the elastic rope on the right side of the rectangular rope net to the hooks on the second bracket to prevent the left and right sides of the rectangular rope net from being stuck. When the elastic rope is pulled apart, the left and right sides of the rectangular rope net are stretched together with the elastic rope while the overall area of ​​the rectangular rope net remains unchanged. Then, the upper and lower sides of the rectangular rope net will become shorter. As a result, the upper side of the rectangular rope net will drive the T-shaped sliders in the upper cross tube to move in the T-shaped slots and the distance between the two adjacent T-shaped sliders will be reduced. The two adjacent T-shaped sliders will squeeze the compression spring between them. The lower side of the rectangular rope net is the same as the upper side of the rectangular rope net. Then, when the flexible protective fence is disassembled and assembled, the left and right sides of the rectangular rope net will be restored to their initial length together with the elastic rope, and the upper and lower sides of the rectangular rope net will also be restored to their initial lengths with the elastic recovery of the compression springs.

[0020] Step (4) is specifically as follows: repeat steps (2) and (3) multiple times to install multiple brackets, wherein, when installing the second flexible protective fence, the left end of the horizontal tube on the upper side of the second rectangular rope net is correspondingly plugged into the right end pipe joint of the horizontal tube on the upper side of the first rectangular rope net, the clamping nail on the right end pipe joint of the horizontal tube on the upper side of the first rectangular rope net is correspondingly clamped into the clamping long hole on the left end of the horizontal tube on the upper side of the second rectangular rope net and is located in the clamping groove, the left end of the horizontal tube on the lower side of the second rectangular rope net is correspondingly plugged into the right end pipe joint of the horizontal tube on the lower side of the first rectangular rope net, the clamping nail on the right end pipe joint of the horizontal tube on the lower side of the first rectangular rope net is correspondingly clamped into the clamping long hole on the left end of the horizontal tube on the lower side of the second rectangular rope net and is located in the clamping groove, so that the first flexible fence and the second flexible protective fence can be correspondingly spliced ​​together, and so that multiple flexible protective fences can be spliced ​​together until the rectangular tunnel is blocked.

[0021] Compared with the prior art, the present invention has outstanding substantial features and significant progress. Specifically, the bracket of the present invention is composed of two vertically arranged telescopic rod groups, and the fixed tubes of the two telescopic rod groups are hinged by hinges, which can be folded and stored conveniently. The bracket is supported between the bottom and top of the rectangular tunnel without the need for additional fixings. In addition, transverse tubes are arranged on the upper and lower sides of the rectangular rope net, and the two ends of the transverse tubes are respectively inserted into the C-tubes on the two adjacent brackets. The overall installation is simple and the disassembly and assembly are fast. The rectangular rope net is made of aramid material, which is fireproof, anti-static, corrosion-resistant, and recyclable for multiple uses. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 A front view of the support of the present invention;

[0024] Figure 3 It is a left side view of the bracket of the present invention;

[0025] Figure 4 It is a structural schematic diagram of the flexible protective fence of the present invention;

[0026] Figure 5 It is a schematic diagram of the internal structure of the transverse tube of the present invention;

[0027] Figure 6 It is a simplified structural diagram of the lower fixed pipe of the present invention.

[0028] Figure 7 yes Figure 4 A partial enlarged view of point A in the middle.

[0029] Figure 8 yes Figure 4 A partial enlarged view of point B in the middle.

[0030] Fig. 9 yes Figure 5 A partial enlarged view of point C in the middle.

[0031] Fig.10 yes Figure 1 A partial enlarged view of point D in the middle. DETAILED DESCRIPTION

[0032] The embodiments of the present invention are further described below with reference to the accompanying drawings.

[0033] like Figure 1-10 As shown, a flexible protective fence on the outside of the closed wall of a coal mine tunnel includes a plurality of brackets, with the tunnel exit side of the coal mine tunnel as the front side, and each bracket is arranged at intervals on the left and right in a rectangular tunnel outside the closed wall of the coal mine tunnel, and a flexible protective fence is arranged between two adjacent brackets, and each flexible protective fence is spliced ​​on the left and right sides to seal the rectangular tunnel in sequence.

[0034] The bracket includes two vertically arranged telescopic rod groups, the two telescopic rod groups have the same structure and are symmetrically arranged up and down. The upper telescopic rod group includes a plug-in rod 1 and a fixed tube 2. The plug-in rod 1 is vertically inserted into the fixed tube 2, and the upper end of the plug-in rod 1 extends out of the upper end of the fixed tube 2. A locking bolt 3 is installed on the upper side of the outer wall of the fixed tube 2. The inner end of the locking bolt 3 extends into the fixed tube 2 and presses on the outer wall of the plug-in rod 1. A fixed support 4 is fixedly installed on the upper end of the plug-in rod 1. An anti-slip pad 5 is provided on the upper surface of the fixed support 4. A C-shaped tube 6 horizontally arranged along the left and right directions is fixedly connected between the front side of the lower surface of the fixed support 4 and the upper side of the front side of the outer wall of the plug-in rod 1. The C-shaped tube 6 is transparent on the left and right and the open side faces the front and upper part. A plurality of hooks 7 are arranged at vertical intervals on the left and right sides of the outer wall of the fixed tube 2.

[0035] The front side of the lower outer wall of the upper fixed tube 2 and the front side of the upper outer wall of the lower fixed tube 2 are hinged by a hinge, and the rear side of the lower outer wall of the upper fixed tube 2 and the rear side of the upper outer wall of the lower fixed tube 2 are connected by a locking mechanism 9.

[0036] The fixing pipe 2 on the lower side includes two connecting pipes 10, and the two connecting pipes 10 correspond to each other up and down. The outer circumference of the lower side of the upper connecting pipe 10 is provided with a first external thread, and the outer circumference of the upper side of the lower connecting pipe 10 is provided with a second external thread. The rotation directions of the first external thread and the second external thread are opposite. A threaded sleeve 11 is connected between the two connecting pipes 10, and the inner circumference of the threaded sleeve 11 is provided with an internal thread. The outer circumference of the lower side of the upper connecting pipe 10 is threadedly connected to the upper inner side of the threaded sleeve 11, and the outer circumference of the upper side of the lower connecting pipe 10 is threadedly connected to the lower inner side of the threaded sleeve 11. The front side of the lower end outer wall of the upper fixing pipe 2 and the front side of the upper end outer wall of the upper connecting pipe 10 are hinged by the hinge, and the rear side of the lower end outer wall of the upper fixing pipe 2 and the rear side of the upper end outer wall of the upper connecting pipe 10 are connected by the locking mechanism 9.

[0037] The flexible protective fence includes a rectangular rope net 12, the upper and lower sides of the rectangular rope net 12 are both provided with a transverse tube 13, the left and right sides of the rectangular rope net 12 are both connected with an elastic rope 14, the two transverse tubes 13 have the same structure and are symmetrically arranged up and down, the transverse tube 13 is horizontally arranged in the left and right directions, and a pipe joint 15 is integrally formed at the right end of the transverse tube 13, the outer diameter of the pipe joint 15 is equal to the inner diameter of the transverse tube 13, and a guide long hole (not shown) is opened in the lower side wall of the upper transverse tube 13 along the left and right directions, and a guide long rod 16 is fixedly arranged in the upper transverse tube 13, and the guide rod 16 is fixedly arranged in the upper transverse tube 13. The outer diameter of the guide rod 16 is equal to the inner diameter of the cross tube 13. The lower side of the guide rod 16 is provided with a T-slot 17 which is open on the left, right and lower sides and is larger at the top and smaller at the bottom. The T-slot 17 corresponds to the guide long hole up and down. A plurality of T-slide blocks 18 arranged at intervals on the left and right are matched and slidably arranged in the T-slot 17. A compression spring 19 embedded in the upper side of the T-slot 17 is connected between two adjacent T-slide blocks 18. The upper side of the rectangular rope net 12 passes through the guide long hole and extends into the cross tube 13 and is fixedly connected to the bottom of each T-slide block 18.

[0038] A clamping nail 20 is fixedly connected to the front side of the outer wall of the pipe joint 15, and a long clamping hole 21 with open left, front and rear sides is opened in the left and right directions on the front side of the left end pipe wall of the horizontal pipe 13, and a clamping groove 22 with open upper side is provided on the right side of the bottom edge of the long clamping hole 21.

[0039] The rectangular rope net 12 is made of aramid material, and the meshes of the rectangular rope net 12 are diamond-shaped.

[0040] Using the above technical solution, a method for installing a flexible protective fence outside a closed wall of a coal mine tunnel specifically includes the following steps:

[0041] (1) Install the first bracket on the far left side of the rectangular tunnel outside the closed wall of the coal mine tunnel;

[0042] (2) Install a second bracket on the right side of the first bracket at a distance of 13 from the horizontal pipe;

[0043] (3) Install a flexible protective fence between the first bracket and the second bracket;

[0044] (4) Repeat steps (2) and (3) multiple times to splice multiple flexible protective fences until the rectangular tunnel is blocked.

[0045] Step (1) is specifically as follows: pull out the plug-in rod 1 in the upper telescopic rod group of the first bracket to the longest pull-out position, tighten the upper locking bolt 3 to fix the plug-in rod 1 in the upper telescopic rod group, support the lower fixed support 4 on the ground, make the lower anti-slip pad 5 contact the ground, lift the upper fixed tube 2, make the lower end of the upper fixed tube 2 dock with the upper end of the lower fixed tube 2, then buckle the upper fixed tube 2 and the lower fixed tube 2 with the corresponding locking mechanism 9 to fix them, and pull out The plug-in rod 1 in the lower telescopic rod group is rotated until the upper fixed support 4 contacts the top of the rectangular tunnel, and the upper anti-skid pad 5 contacts the top of the rectangular tunnel, and then the threaded sleeve 11 on the lower fixed pipe 2 is rotated to make the two connecting pipes 10 move away from each other, the distance increases, and the overall length of the lower fixed pipe 2 increases, so that the lower anti-skid pad 5 is pressed tightly against the ground, and the upper anti-skid pad 5 is pressed tightly against the top of the rectangular tunnel, the first bracket is supported tightly as a whole, and the installation of the first bracket is completed.

[0046] Step (2) is specifically as follows: pull out the plug-in rod 1 in the upper telescopic rod group of the second bracket to the longest pull-out position, tighten the upper locking bolt 3 to fix the plug-in rod 1 in the upper telescopic rod group, support the lower fixed support 4 on the ground and place it at a distance of one horizontal tube 13 from the right side of the first bracket, with the lower anti-slip pad 5 in contact with the ground, lift the upper fixed tube 2, make the lower end of the upper fixed tube 2 dock with the upper end of the lower fixed tube 2, and then lock the upper fixed tube 2 with the lower fixed tube 2 through the corresponding locking mechanism 9. The fixed pipe 2 is buckled and fixedly connected, and the plug-in rod 1 in the lower telescopic rod group is pulled out until the upper fixed support 4 contacts the top of the rectangular tunnel, and the upper anti-skid pad 5 contacts the top of the rectangular tunnel, and then the threaded sleeve 11 on the lower fixed pipe 2 is rotated to make the two connecting pipes 10 move away from each other, the distance increases, and the overall length of the lower fixed pipe 2 increases, so that the lower anti-skid pad 5 is pressed tightly against the ground, and the upper anti-skid pad 5 is pressed tightly against the top of the rectangular tunnel, the second bracket is supported tightly as a whole, and the installation of the second bracket is completed.

[0047] Step (3) is specifically as follows: the left end of the transverse tube 13 on the upper side of the rectangular rope net 12 is correspondingly inserted into the right port of the C-shaped tube 6 on the upper side of the first bracket, and then moved to the right so that the right end of the transverse tube 13 on the upper side of the rectangular rope net 12 is correspondingly inserted into the left port of the C-shaped tube 6 on the upper side of the second bracket, and then the transverse tube 13 on the lower side of the rectangular rope net 12 is pulled downward to pull the rectangular rope net 12 downward, and then the left end of the transverse tube 13 on the lower side of the rectangular rope net 12 is correspondingly inserted into the right port of the C-shaped tube 6 on the lower side of the first bracket, and then moved to the right so that the right end of the transverse tube 13 on the lower side of the rectangular rope net 12 is correspondingly inserted into the left port of the C-shaped tube 6 on the lower side of the second bracket, and finally the elastic rope 14 on the left side of the rectangular rope net 12 is fixedly connected to each hook 7 on the first bracket, and the elastic rope 14 on the right side of the rectangular rope net 12 is fixedly connected to each hook 7 on the second bracket to prevent the left and right sides of the rectangular rope net 12 from being stuck. The left and right sides of the rectangular rope net 12 are stretched together with the elastic rope 14 under the condition that the overall area of ​​the rectangular rope net 12 remains unchanged, and the upper and lower sides of the rectangular rope net 12 will become shorter, so that the upper side of the rectangular rope net 12 will drive the T-shaped sliders 18 in the upper cross tube 13 to move in the T-slot 17 and the distance between the two adjacent T-shaped sliders 18 will be reduced, and the two adjacent T-shaped sliders 18 will squeeze the compression spring 19 located between them, and the lower side of the rectangular rope net 12 is the same as the upper side of the rectangular rope net 12. Then, when the flexible protective fence is disassembled and assembled, the left and right sides of the rectangular rope net 12 are restored to their initial lengths together with the elastic rope 14, and the upper and lower sides of the rectangular rope net 12 will also be restored to their initial lengths with the elastic recovery of the compression springs 19.

[0048] Step (4) is specifically as follows: repeat steps (2) and (3) multiple times to install multiple brackets, wherein when installing the second flexible protective fence, the left end of the transverse tube 13 on the upper side of the second rectangular rope net 12 is correspondingly plugged into the right end pipe joint 15 of the transverse tube 13 on the upper side of the first rectangular rope net 12, and the clamping nail 20 on the right end pipe joint 15 of the transverse tube 13 on the upper side of the first rectangular rope net 12 is correspondingly clamped into the clamping long hole 21 at the left end of the transverse tube 13 on the upper side of the second rectangular rope net 12 and is located in the clamping groove 22, and the second rectangular rope net 12 is clamped into the left end of the transverse tube 13 on the upper side of the second rectangular rope net 12. The left end of the transverse tube 13 at the lower side of the rectangular rope net 12 is correspondingly plugged into the right end pipe joint 15 of the transverse tube 13 at the lower side of the first rectangular rope net 12, and the pin 20 on the right end pipe joint 15 of the transverse tube 13 at the lower side of the first rectangular rope net 12 is correspondingly clamped in the long clamping hole 21 at the left end of the transverse tube 13 at the lower side of the second rectangular rope net 12 and is located in the clamping groove 22. In this way, the first flexible fence and the second flexible protective fence can be correspondingly spliced ​​together. In this way, multiple flexible protective fences can be spliced ​​together until the rectangular tunnel is blocked.

[0049] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention is described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A flexible protective fence outside the closed wall of a coal mine tunnel, characterized by: It includes several brackets, with the tunnel exit side of the coal mine tunnel as the front side, and each bracket is arranged in a rectangular tunnel outside the closed wall of the coal mine tunnel at intervals on the left and right, and a flexible protective fence is arranged between two adjacent brackets, and each flexible protective fence is spliced ​​in turn on the left and right to block the rectangular tunnel; The flexible protective fence comprises a rectangular rope net, wherein the upper and lower sides of the rectangular rope net are both provided with cross tubes, and the left and right sides of the rectangular rope net are both connected with elastic ropes, the two cross tubes have the same structure and are symmetrically arranged up and down, the cross tubes are arranged horizontally in the left and right directions, and a pipe joint is integrally formed on the right end of the cross tube, and the outer diameter of the pipe joint is equal to the inner diameter of the cross tube, and a guide long hole is opened in the lower side wall of the upper cross tube in the left and right directions, and a guide long rod is fixedly arranged in the upper cross tube, and the outer diameter of the guide long rod is equal to the inner diameter of the cross tube, and a T-slot is opened on the lower side of the guide long rod in the left and right directions, which is open on the left, right and lower sides and larger on the top and smaller on the bottom, and the T-slot corresponds to the guide long hole up and down, and a plurality of T-slide blocks arranged at intervals on the left and right are matched and slidably arranged in the T-slot, and a compression spring embedded in the upper side of the T-slot is connected between two adjacent T-slide blocks, and the upper side of the rectangular rope net passes through the guide long hole and extends into the cross tube and is fixedly connected to the bottom of each T-slide block; A clamping nail is fixedly connected to the front side of the outer wall of the pipe joint, and a long clamping hole with open left, front and rear sides is opened in the left and right directions on the front side of the left end of the horizontal pipe, and a clamping groove with open upper side is provided on the right side of the bottom edge of the long clamping hole; The mesh of the rectangular rope net is diamond-shaped.

2. The flexible protective fence outside the closed wall of a coal mine tunnel according to claim 1 is characterized by: The bracket includes two vertically arranged telescopic rod groups, the two telescopic rod groups have the same structure and are symmetrically arranged up and down, the upper telescopic rod group includes a plug-in rod and a fixed tube, the plug-in rod is vertically plugged into the fixed tube, the upper end of the plug-in rod extends out of the upper end of the fixed tube, a locking bolt is installed on the upper side of the outer wall of the fixed tube, the inner end of the locking bolt extends into the fixed tube and presses on the outer wall of the plug-in rod, a fixed support is fixedly installed on the upper end of the plug-in rod, an anti-slip pad is arranged on the upper surface of the fixed support, a C-shaped tube horizontally arranged along the left and right directions is fixedly connected between the front side of the lower surface of the fixed support and the upper side of the front side of the outer wall of the plug-in rod, the C-shaped tube is transparent on the left and right and the open side faces the front and upper part, and a plurality of hooks are arranged at vertical intervals on the left and right sides of the outer wall of the fixed tube; The front side of the lower outer wall of the upper fixed tube and the front side of the upper outer wall of the lower fixed tube are hinged by a hinge, and the rear side of the lower outer wall of the upper fixed tube and the rear side of the upper outer wall of the lower fixed tube are connected by a locking mechanism.

3. The flexible protective fence outside the closed wall of a coal mine tunnel according to claim 2 is characterized by: The fixing tube on the lower side includes two connecting tubes, which correspond to each other up and down. The outer circumference of the lower side of the upper connecting tube is provided with a first external thread, and the outer circumference of the upper side of the lower connecting tube is provided with a second external thread. The rotation directions of the first external thread and the second external thread are opposite. A threaded sleeve is connected between the two connecting tubes, and the inner circumference of the threaded sleeve is provided with an internal thread. The outer circumference of the lower side of the upper connecting tube is threadedly connected to the upper inner side of the threaded sleeve, and the outer circumference of the upper side of the lower connecting tube is threadedly connected to the lower inner side of the threaded sleeve. The front side of the outer wall of the lower end of the upper fixing tube and the front side of the outer wall of the upper end of the upper connecting tube are hinged by the hinge, and the rear side of the outer wall of the lower end of the upper fixing tube and the rear side of the outer wall of the upper end of the upper connecting tube are connected by the locking mechanism.

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