Coal mine underground roadway empty roof supporting device

Abstract

A coal mine underground roadway empty roof supporting device comprises a left support, a right support, a first connecting rod assembly and a second connecting rod assembly, the left support comprises a left top beam, a left base and left telescopic stand columns, at least two left telescopic stand columns are arranged between the left top beam and the left base, and the right support comprises a right top beam, a right base and right telescopic stand columns. At least two right telescopic stand columns are arranged between the right top beam and the right base, the left top beam is fixedly connected with the right top beam, the left support and the right support are fixedly connected into a whole, the left support is connected with a first connecting rod assembly, and the right support is connected with a second connecting rod assembly. The first connecting rod assembly and the second connecting rod assembly jointly guarantee the stability of the left support and the right support, the second connecting rod assembly limits the lifting amplitude of the first connecting rod assembly, safety is improved, the machining and mounting cost of the first connecting rod assembly is low, and the manufacturing cost of the whole equipment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of underground coal mine support, in particular to an empty roof support device for underground coal mine tunnels. Background Art

[0002] In some parts of the underground tunnel of a coal mine, due to the installation of coal machines such as transfer machines and conveyors, the tunnel cannot be supported. This application refers to the top of the tunnel as "empty top". For the support of the "empty top", a support can be set on each side of the "empty top", and the two supports form a "door" shaped structure to support the "empty top".

[0003] For example, the Chinese invention patent with authorization announcement number CN105697041B discloses a telescopic top beam connecting rod type temporary support bracket, including a front frame and a rear frame. The front frame and the rear frame have the same main structure, both of which are composed of longitudinal frames on both sides and two cross beams; two push jacks are arranged between the front frame and the rear frame, and the two push jacks are respectively pulled on the bases of the front frame and the rear frame, thereby forming a group of connected brackets; a plurality of longitudinal telescopic top beams are arranged on the top surfaces of the cross beams of the front frame and the rear frame respectively; it also includes a hydraulic system composed of a hydraulic pump station and a hydraulic valve group, and the hydraulic valve group controls the telescopic The longitudinal frame is a kind of vertical frame, which is a kind of vertical frame, and it ...

[0004] The disadvantages are that the longitudinal telescopic top beam is not connected to the front frame, and the stability is poor; the front frame and the rear frame are each equipped with a four-bar linkage, and the processing and installation costs of the four-bar linkage are relatively high. Summary of the invention

[0005] In view of this, in order to address the above-mentioned shortcomings, it is necessary to propose a coal mine underground tunnel empty roof support device with high stability and low processing and installation costs.

[0006] A device for supporting an empty roof of an underground tunnel in a coal mine, comprising a left support, a right support, a No. 1 connecting rod assembly, and a No. 2 connecting rod assembly, wherein the left support comprises a left top beam, a left base, and a left telescopic column, at least two left telescopic columns are arranged between the left top beam and the left base, the right support comprises a right top beam, a right base, and a right telescopic column, at least two right telescopic columns are arranged between the right top beam and the right base, the left top beam is fixedly connected to the right top beam, the No. 1 connecting rod assembly comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is rotatably connected to the right top beam, the second end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the The second end of the second connecting rod is rotatably connected to the right base, and the second connecting rod assembly includes a third connecting rod, a fourth connecting rod, a fifth connecting rod, and a sixth connecting rod. The third connecting rod is fixed on the left base, the first end of the fourth connecting rod is rotatably connected to the left top beam, the second end of the fourth connecting rod is rotatably connected to the first end of the fifth connecting rod, the second end of the fifth connecting rod is rotatably connected to the first end of the third connecting rod, the third end of the fourth connecting rod is located between the first end of the fourth connecting rod and the second end of the fourth connecting rod, the third end of the fourth connecting rod is rotatably connected to the first end of the sixth connecting rod, and the second end of the sixth connecting rod is rotatably connected to the second end of the third connecting rod.

[0007] Preferably, the empty roof support device of the underground coal mine tunnel includes a middle beam, and two ends of the middle beam are fixedly connected to the left top beam and the right top beam respectively.

[0008] Preferably, the empty roof support device for underground coal mine tunnels comprises a telescopic assembly, and two ends of the telescopic assembly are hinged to the left base and the right base respectively.

[0009] Preferably, the length of the third connecting rod is 841 mm, the length of the fourth connecting rod is 1900 mm, the length from the first end to the third end of the fourth connecting rod is 1420 mm, the length from the second end to the third end of the fourth connecting rod is 480 mm, the length of the fifth connecting rod is 1170 mm, and the length of the sixth connecting rod is 1450 mm.

[0010] Preferably, the plane where the center line of the left top beam and the center line of the left base are located is the first reference plane, the geometric center of the left telescopic column and the geometric center of the No. 2 connecting rod assembly are both located in the first reference plane, and the No. 2 connecting rod assembly is located on one side of the left telescopic column.

[0011] Preferably, the plane where the center line of the right top beam and the center line of the right base are located is the second reference plane, the geometric center of the right telescopic column is located in the second reference plane, and the No. 1 connecting rod assembly is located on one side of the right telescopic column perpendicular to the direction of the second reference plane.

[0012] Preferably, there are two No. 1 connecting rod assemblies, and the two No. 1 connecting rod assemblies are located on both sides of the right telescopic column.

[0013] Preferably, the extending direction from the first end to the second end of the first connecting rod is a direction away from the middle beam.

[0014] Preferably, the left telescopic column is rotatably connected to the left top beam or the left base.

[0015] Preferably, the right telescopic column is rotatably connected to the right top beam or the right base.

[0016] Beneficial effects: the left bracket and the right bracket are fixedly connected into a whole, the left bracket is connected to a No. 1 connecting rod assembly, and the right bracket is connected to a No. 2 connecting rod assembly. The No. 1 connecting rod assembly and the No. 2 connecting rod assembly jointly ensure the stability of the left bracket and the right bracket. The No. 2 connecting rod assembly limits the lifting range of the No. 1 connecting rod assembly, thereby improving safety. The processing and installation costs of the No. 1 connecting rod assembly are relatively low, thereby reducing the cost of the overall equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front view of the empty roof support device of the underground coal mine tunnel.

[0018] Figure 2 It is a top view of the empty roof support device of the underground coal mine tunnel.

[0019] Figure 3 It is a partial enlarged view of the socket-column assembly.

[0020] Figure 4 Schematic diagram of different states of the No. 2 connecting rod assembly.

[0021] In the figure: tunnel 10, coal machine 20, left support 30, left top beam 31, left base 32, left telescopic column 33, right support 40, right top beam 41, right base 42, right telescopic column 43, No. 1 connecting rod assembly 50, first connecting rod 51, second connecting rod 52, No. 2 connecting rod assembly 60, third connecting rod 61, fourth connecting rod 62, fifth connecting rod 63, sixth connecting rod 64, middle beam 70, pin rod 80, telescopic assembly 90, socket column assembly 100, column end 101, socket groove 102, socket bottom 103. DETAILED DESCRIPTION

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] See also Figure 1 and Figure 2The embodiment of the utility model provides an empty roof support device for an underground tunnel in a coal mine, including a left bracket 30, a right bracket 40, a No. 1 connecting rod assembly 50, and a No. 2 connecting rod assembly 60. The left bracket 30 includes a left top beam 31, a left base 32, and a left telescopic column 33. At least two left telescopic columns 33 are arranged between the left top beam 31 and the left base 32. The right bracket 40 includes a right top beam 41, a right base 42, and a right telescopic column 43. At least two right telescopic columns 43 are arranged between the right top beam 41 and the right base 42. The left top beam 31 is fixedly connected to the right top beam 41. The No. 1 connecting rod assembly 50 includes a first connecting rod 51 and a second connecting rod 52. The first end of the first connecting rod 51 is rotatably connected to the right top beam 41, and the second end of the first connecting rod 51 is rotatably connected to the second connecting rod 52. The first end of the second link 52 is rotatably connected, the second end of the second link 52 is rotatably connected to the right base 42, the second link assembly 60 includes a third link 61, a fourth link 62, a fifth link 63, and a sixth link 64. The third link 61 is fixed on the left base 32, the first end of the fourth link 62 is rotatably connected to the left top beam 31, the second end of the fourth link 62 is rotatably connected to the first end of the fifth link 63, the second end of the fifth link 63 is rotatably connected to the first end of the third link 61, the third end of the fourth link 62 is located between the first end of the fourth link 62 and the second end of the fourth link 62, the third end of the fourth link 62 is rotatably connected to the first end of the sixth link 64, and the second end of the sixth link 64 is rotatably connected to the second end of the third link 61.

[0024] The word "left" in this article means Figure 1 The left side of the paper, "right" Figure 1 on the right side of the paper.

[0025] Exemplarily, the telescopic column is a hydraulic cylinder, and the telescopic column is disposed at both ends of the left base 32 or the right base 42 , and the telescopic column is disposed at both ends of the left top beam 31 or the right top beam 41 .

[0026] The lifting range of the No. 1 connecting rod assembly 50 is not limited, and the safety is poor. The lifting range of the No. 2 connecting rod assembly 60 is limited, and the safety is high. If the left bracket 30 and the right bracket 40 are both connected to a No. 1 connecting rod assembly 50, the safety is poor because the lifting range is not limited. The No. 2 connecting rod assembly 60 has high requirements for processing parameters and high processing costs. Processing errors and safety errors together cause the lifting ranges of the two No. 2 connecting rod assemblies 60 to be different.

[0027] Beneficial effects: the left bracket 30 and the right bracket 40 are fixedly connected to form a whole, the left bracket 30 is connected to a No. 1 connecting rod assembly 50, and the right bracket 40 is connected to a No. 2 connecting rod assembly 60. The No. 1 connecting rod assembly 50 and the No. 2 connecting rod assembly 60 jointly ensure the stability of the left bracket 30 and the right bracket 40. The No. 2 connecting rod assembly 60 limits the lifting range of the No. 1 connecting rod assembly 50, thereby improving safety. The processing and installation costs of the No. 1 connecting rod assembly 50 are relatively low, thereby reducing the cost of the overall equipment.

[0028] See also Figure 1 and Figure 2 Further, the empty roof support device of the underground coal mine tunnel includes a middle beam 70, and the two ends of the middle beam 70 are fixedly connected to the left top beam 31 and the right top beam 41 respectively.

[0029] Exemplarily, the middle beam 70 is used to support the “empty top”, and the length of the middle beam 70 is designed according to the length of the “empty top” in the tunnel 10 .

[0030] Exemplarily, a first through hole is provided at each end of the middle beam 70, and a second through hole is provided at the side of the left top beam 31 and the right top beam 41 connected to the middle beam 70, respectively. The first through hole and the second through hole are square holes of the same size. The two sides of the middle beam 70 are fixedly connected to the left top beam 31 and the right top beam 41 through a pin 80 whose cross-sectional shape matches the first through hole and the second through hole. On either side of the middle beam 70, the pin 80 passes through the second through hole, the first through hole, and the second through hole in sequence to fix the middle beam 70 to the left top beam 31 and the right top beam 41 relatively, that is, both sides of one end of the middle beam 70 are connected to the left top beam 31 or the right top beam 41, and the two sides of the pin 80 bear torsion and are not easily damaged, and the middle beam 70 cannot rotate relative to the left top beam 31 and the right top beam 41. If the middle beam 70 and the left top beam 31 or the right top beam 41 are nested and plugged in, they are easily bent and deformed.

[0031] See also Figure 1 and Figure 2 Further, the empty roof support device of the underground coal mine tunnel includes a telescopic component 90, and both ends of the telescopic component 90 are hinged to the left base 32 and the right base 42 respectively.

[0032] Exemplarily, the telescopic assembly 90 is a hydraulic cylinder.

[0033] See also Figure 1 and Figure 2 Further, the length of the third connecting rod 61 is 841 mm, the length of the fourth connecting rod 62 is 1900 mm, the length from the first end to the third end of the fourth connecting rod 62 is 1420 mm, the length from the second end to the third end of the fourth connecting rod 62 is 480 mm, the length of the fifth connecting rod 63 is 1170 mm, and the length of the sixth connecting rod 64 is 1450 mm.

[0034] See also Figure 4 The height of the second connecting rod assembly 60 itself is the straight-line distance between the first end of the fourth connecting rod 62 and the first end of the third connecting rod 61. Figure 4 In the figure, A, B, and C are schematic diagrams of the No. 2 connecting rod assembly 60 in the extended state, the intermediate state, and the folded state, respectively, and its own height is 2960mm, 2565mm, and 960mm, respectively.

[0035] See also Figure 1 and Figure 2 Furthermore, the plane where the center line of the left top beam 31 and the center line of the left base 32 are located is the first reference plane, the geometric center of the left telescopic column 33 and the geometric center of the No. 2 connecting rod assembly 60 are both located in the first reference plane, and the No. 2 connecting rod assembly 60 is located on one side of the left telescopic column 33.

[0036] See also Figure 1 and Figure 2 Further, the plane where the center line of the right top beam 41 and the center line of the right base 42 are located is the second reference plane, the geometric center of the right telescopic column 43 is located in the second reference plane, and the No. 1 connecting rod assembly 50 is located on one side of the right telescopic column 43 perpendicular to the direction of the second reference plane.

[0037] See also Figure 1 and Figure 2 Further, there are two No. 1 connecting rod assemblies 50 , and the two No. 1 connecting rod assemblies 50 are located on both sides of the right telescopic column 43 .

[0038] See also Figure 1 and Figure 2 Furthermore, the extension direction from the first end to the second end of the first connecting rod 51 is a direction away from the middle beam 70. This can prevent the first connecting rod assembly 50 from interfering with the coal machine 20 in the tunnel 10.

[0039] Exemplarily, a No. 2 connecting rod assembly 60 can be added to the right bracket 40, and the installation method is the same as that on the left bracket 30. The installation position of the No. 1 connecting rod assembly 50 of the right bracket 40 can avoid interference with the No. 2 connecting rod assembly 60 on the right bracket 40, thereby minimizing the length of the right bracket 40 to the maximum extent.

[0040] See also Figure 1 and Figure 2 Further, the left telescopic column 33 is rotatably connected to the left top beam 31 or the left base 32.

[0041] See also Figure 1 and Figure 2 Further, the right telescopic column 43 is rotatably connected to the right top beam 41 or the right base 42.

[0042] For example, see Figure 3The hollow roof support device of the underground tunnel of the coal mine includes a socket column assembly 100, which includes a column end 101 and a socket 102. The column ends 101 are provided at both ends of the telescopic column, and the left top beam 31, the left base 32, the right top beam 41, and the right base 42 are provided with the socket 102. The column end 101 is spherical, and the bottom surface of the socket 102 is provided with a socket bottom 103 matching the shape of the column end 101. The column end 101 extends into the socket 102 and contacts the socket bottom 103. The telescopic column can be hinged with the socket 102 at the same time. The socket column assembly 100 can adapt to the characteristics of the No. 2 connecting rod assembly 60 and has good load-bearing performance.

[0043] Exemplarily, the inner diameter of the socket 102 is greater than the outer diameter of the telescopic column, and the cross-section of the socket 102 is preferably a trapezoid.

[0044] The modules or units in the device of the embodiment of the utility model can be combined, divided and deleted according to actual needs.

[0045] The above disclosure is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiments and equivalent changes made according to the claims of the present invention still fall within the scope of the present invention.

Claims

1. A roof support device for underground coal mine tunnels, characterized in that: The invention comprises a left bracket, a right bracket, a first connecting rod assembly and a second connecting rod assembly, wherein the left bracket comprises a left top beam, a left base and a left telescopic column, at least two left telescopic columns are arranged between the left top beam and the left base, the right bracket comprises a right top beam, a right base and a right telescopic column, at least two right telescopic columns are arranged between the right top beam and the right base, the left top beam is fixedly connected to the right top beam, the first connecting rod assembly comprises a first connecting rod and a second connecting rod, the first end of the first connecting rod is rotatably connected to the right top beam, the second end of the first connecting rod is rotatably connected to the first end of the second connecting rod, and the second end of the second connecting rod Rotatingly connected to the right base, the No. 2 connecting rod assembly includes a third connecting rod, a fourth connecting rod, a fifth connecting rod and a sixth connecting rod. The third connecting rod is fixed on the left base, the first end of the fourth connecting rod is rotationally connected to the left top beam, the second end of the fourth connecting rod is rotationally connected to the first end of the fifth connecting rod, the second end of the fifth connecting rod is rotationally connected to the first end of the third connecting rod, the third end of the fourth connecting rod is located between the first end of the fourth connecting rod and the second end of the fourth connecting rod, the third end of the fourth connecting rod is rotationally connected to the first end of the sixth connecting rod, and the second end of the sixth connecting rod is rotationally connected to the second end of the third connecting rod.

2. The empty roof support device for underground coal mine tunnel according to claim 1, characterized in that: The empty roof support device for underground coal mine tunnels comprises a middle beam, and two ends of the middle beam are respectively fixedly connected to a left top beam and a right top beam.

3. The empty roof support device for underground coal mine tunnel according to claim 1, characterized in that: The empty roof supporting device of the underground tunnel of the coal mine comprises a telescopic component, and two ends of the telescopic component are respectively hinged to a left base and a right base.

4. The empty roof support device for underground coal mine tunnel according to claim 1, characterized in that: The length of the third connecting rod is 841 mm, the length of the fourth connecting rod is 1900 mm, the length from the first end to the third end of the fourth connecting rod is 1420 mm, the length from the second end to the third end of the fourth connecting rod is 480 mm, the length of the fifth connecting rod is 1170 mm, and the length of the sixth connecting rod is 1450 mm.

5. The empty roof support device for underground coal mine tunnel according to claim 1, characterized in that: The plane where the center line of the left top beam and the center line of the left base are located is the first reference plane, the geometric center of the left telescopic column and the geometric center of the No. 2 connecting rod assembly are both located in the first reference plane, and the No. 2 connecting rod assembly is located on one side of the left telescopic column.

6. The empty roof support device for underground coal mine tunnel according to claim 2, characterized in that: The plane where the center line of the right top beam and the center line of the right base are located is the second reference plane, the geometric center of the right telescopic column is located in the second reference plane, and the No. 1 connecting rod assembly is located on one side of the right telescopic column perpendicular to the direction of the second reference plane.

7. The empty roof support device for underground coal mine tunnel according to claim 6, characterized in that: There are two No. 1 connecting rod assemblies, and the two No. 1 connecting rod assemblies are located on both sides of the right telescopic column.

8. The empty roof support device for underground coal mine tunnel according to claim 6, characterized in that: The extending direction from the first end to the second end of the first connecting rod is a direction away from the middle beam.

9. The empty roof support device for underground coal mine tunnel according to claim 1, characterized in that: The left telescopic column is rotatably connected to the left top beam or the left base.

10. The empty roof support device for underground coal mine tunnel according to claim 1, characterized in that: The right telescopic column is rotatably connected to the right top beam or the right base.

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