Underground air door interlocking device for coal mine

Abstract

The utility model provides a coal mine underground air door interlocking device. The coal mine underground air door interlocking device comprises a box body, a box cover, an auxiliary shaft, a rolling shaft, a single-arm sleeve, a triangular sleeve, a pulley, a steel wire rope and the like. A rolling shaft is assembled with a single-arm sleeve and a triangular sleeve and then installed in a box body and a box cover guide rail groove, and one end of a steel wire rope is connected with the end face of a connecting rod of the sleeve and connected with an air door through a box body rope outlet hole and a pulley. When the air doors on the two sides are in a closed state, the rolling shaft tensions the right steel wire rope within the left arc range of the guide rail groove, and the rolling shaft tensions the left steel wire rope within the right arc range of the guide rail groove. When the air door on one side is opened, the steel wire rope of the air door on the other side is always in a tensioning state to achieve locking. By the adoption of the technical scheme, the limiting parts move in the box body, and the parts can be prevented from being corroded by environmental factors and collided and damaged by objects to a large extent.

Description

Technical Field

[0001] This utility model belongs to the field of coal mine equipment technology, and in particular relates to a double air door interlocking device in underground coal mines. Background Technology

[0002] To ensure ventilation safety in coal mines, connecting roadways between the intake and return air shafts and between the main intake and return airways must be equipped with two interlocked forward air doors and two reverse air doors. Air door interlocking devices are commonly used to prevent the air doors on both sides from opening simultaneously.

[0003] Currently, common damper interlocking devices consist of main components such as counterweights, slides, limiting components, and locking components. These components are constantly exposed to the environment, suffering from water seepage from the tunnel and corrosion from sulfur compounds. Furthermore, damage can occur during material transportation or when falling coal gangue collides with these critical components, posing challenges to the lifespan, reliability, and flexibility of the damper interlocking device. For example, Chinese utility model patent CN221591037 discloses a "double-tube damper interlocking device," which consists of a sleeve, inner tube, limiting cable, limiting plate, counterweight, connecting plate, rotating handle, and semi-circular block. Key components of this type of damper interlocking device, such as the limiting plate, counterweight, connecting plate, rotating handle, and semi-circular block, are all exposed to the environment and susceptible to corrosion from water seepage from the tunnel and sulfur compounds. The rotating handle and semi-circular block are also easily deformed and damaged by impacts. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides an interlocking device for underground ventilation doors in coal mines.

[0005] This utility model adopts the following technical solution: a coal mine underground ventilation door interlocking device, including a housing, a housing cover, an auxiliary shaft, a rolling shaft, a single-arm sleeve, a triangular sleeve, a pulley, a pulley bracket, a pulley shaft, and a steel wire rope; the single-arm sleeve is installed between the two sleeves of the triangular sleeve, the rolling shaft passes through the single-arm sleeve and the triangular sleeve, and both ends of the rolling shaft are installed in the guide grooves of the housing and the housing cover; the end of the connecting rod of the single-arm sleeve is connected to one end of the steel wire rope, and the end face of the triangular connecting rod of the triangular sleeve is connected to another steel wire rope; the two steel wire ropes pass through two adjacent auxiliary shafts on the left and right sides of the housing, respectively. The axes are coplanar centerlines, and then the steel wire rope exits through the wire rope hole on the upper side of the box, and then passes through the corresponding pulleys to connect to the two side dampers respectively; when the damper is closed, the rolling shaft is moved to the left arc range of the guide rail groove to tension the right side steel wire rope; when the damper is closed, the rolling shaft is moved to the right arc range of the guide rail groove to tension the left side steel wire rope; when both dampers are closed, the rolling shaft moves to the lowest point of the guide rail groove by gravity. Utilizing the principle that any point on a circle is equidistant from the center, when one damper is open, the steel wire rope connected to the other damper is always in a taut state to achieve damper locking.

[0006] The box steel plate thickness is not less than 10mm, the box lower part is not provided with a bottom plate, the box upper side, left side and right side are provided with wall plates, the box upper side wall plate is provided with two steel wire rope exit holes, the wall plate is provided with a box cover fixing hole, the box outside upper side is connected with two box fixing plates, the box fixing plate middle part is provided with a box fixing hole, the box inside lower part is provided with a box fixing hole, the box upper side sealing plate is provided with four auxiliary shaft installation holes, and the box middle part is connected and guided by two arc guide rail grooves.

[0007] The box cover upper side, left side and right side are provided with cover plate fixing holes corresponding to the box, the box cover steel plate thickness is not less than 10mm, the box cover upper side is provided with auxiliary shaft installation holes corresponding to the box, and the middle part is provided with guide rail grooves corresponding to the box.

[0008] The guide rail groove is connected by two arc grooves, the middle point of the center line of the adjacent auxiliary shaft installation holes on the left side of the box is the center of the right side arc groove, the middle point of the center line of the adjacent auxiliary shaft installation holes on the right side of the box is the center of the left side arc groove, the arc radius of the arc groove is determined according to the damper opening degree, the two arc grooves are connected and guided at the lower part of the box, the other end of the two arc grooves is stopped at the upper part wall plate of the box, and the movement path of the rolling shaft is limited through the rail surface of the guide rail groove.

[0009] The middle part of the rolling shaft is provided with a cylindrical body with a large diameter in the middle and small diameters at both ends, the length of the middle part of the rolling shaft is greater than the sum of the lengths of the triangular sleeve and the single-arm sleeve by 2mm, the length of the end part of the rolling shaft is equal to the thickness of the box steel plate, the diameter of the middle part of the rolling shaft is smaller than the inner wall diameter of the triangular sleeve and the single-arm sleeve by 1mm, and the diameters of the middle part of the rolling shaft at both ends are smaller than the vertical distance between the two arc surfaces of the guide rail groove by 1mm, so as to facilitate assembly.

[0010] The triangular sleeve is composed of two sleeves and a triangular connecting rod connected with the sleeves, a single-arm sleeve assembly space is left between the two sleeves, and the triangular sleeve can move around the rolling shaft after being assembled with the rolling shaft.

[0011] The single-arm sleeve is composed of a sleeve and a connecting rod connected with the sleeve, the single-arm sleeve is installed concentrically with the rolling shaft in the middle of the triangular sleeve, and the single-arm sleeve can move around the rolling shaft after being assembled with the rolling shaft.

[0012] The auxiliary shaft is provided with a cylindrical body with a large diameter in the middle and small diameters at both ends, the auxiliary shaft is installed in the auxiliary shaft installation holes of the box and the box cover, and the auxiliary steel wire rope slides.

[0013] The diameter of the steel wire rope is equal to the distance between the adjacent middle cylindrical surfaces of the auxiliary shaft.

[0014] The beneficial effects of the scheme are that: the key limiting parts such as the rolling shaft, the triangular sleeve and the single-arm sleeve are arranged in the box body, the principle that the distance from any point on the arc to the center is equal is utilized, so that the air door interlocking purpose is realized, the key limiting parts are prevented from being exposed to the environment, the key limiting parts are not easily eroded by the roadway water and the sulfur compounds, and the key limiting parts are prevented from being damaged by the coal gangue falling and colliding during the material transportation. BRIEF DESCRIPTION OF DRAWINGS

[0015] The utility model is further described below with reference to the drawings.

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 It is a box body structural schematic diagram of the utility model;

[0018] Figure 3 It is a box body structural schematic diagram of the utility model; Figure 2 It is a local enlarged view of A place in the middle;

[0019] Figure 4 It is a box cover structural schematic diagram of the utility model;

[0020] Figure 5 It is a rolling shaft and triangular sleeve and single-arm sleeve assembly schematic diagram of the utility model;

[0021] Figure 6 It is a rolling shaft structural schematic diagram of the utility model;

[0022] Figure 7 It is a single-arm sleeve structural schematic diagram of the utility model;

[0023] Figure 8 It is a triangular sleeve structural schematic diagram of the utility model;

[0024] Figure 9 It is an auxiliary shaft structural schematic diagram of the utility model.

[0025] In the drawing: 1, box body; 2, auxiliary shaft; 3, rolling shaft; 4, single-arm sleeve; 5, triangular sleeve; 6, pulley; 7, pulley support; 8, pulley shaft; 9, steel wire rope; 10, box cover; 11, guide rail groove; 12, box body fixing hole; 13, auxiliary shaft mounting hole; 14, box body fixed plate; 15, box cover fixing hole; 16, steel wire rope exit hole; 41, connecting rod; 42, single-arm sleeve inner wall; 51, triangular connecting rod; 52, triangular sleeve inner wall. DETAILED DESCRIPTION

[0026] The utility model technical scheme is further described below, and the specific embodiments described herein are only used to explain the utility model, but the protection scope is not limited to the description.

[0027] As shown in Figure 1 , Figure 2 , the box 1 is fixed on the roadway side by the fixing hole 12 on the box fixing plate 14 and the internal fixing hole 12 using anchor rod or anchor cable, and the pulley 6, pulley support 7 and pulley shaft 8 are assembled and fixed on the two sides above the box 1.

[0028] As shown in Figure 1 , Figure 7 , Figure 8 , one end of a steel wire rope 9 is welded in advance on the ground and the end face of the connecting rod 41, and the other end of the steel wire rope 9 is welded in advance on the ground and the end face of the triangular connecting rod 51. When welding, the steel wire rope 9 should be straightened to be collinear with the connecting rod 41, and the steel wire rope 9 should be straightened to be coplanar with the triangular connecting rod 51.

[0029] As shown in Figure 5 , Figure 6 , Figure 7 , Figure 8 , the single-arm sleeve 4 is placed between the two sleeves of the triangular sleeve 5, the inner wall 42 of the single-arm sleeve is aligned with the inner wall 52 of the triangular sleeve, and then the rolling shaft 3 is passed through the triangular sleeve 5 and the single-arm sleeve 4 for standby.

[0030] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 9 , the auxiliary shaft 2 is installed in the auxiliary shaft mounting hole 13.

[0031] As shown in Figure 1 , Figure 2 , the assembly shown in Figure 5 is installed at one end of the rolling shaft 3 into the guide rail groove 11 of the box 1. The guide rail groove 11 is connected by two circular arc grooves. The left circular arc groove has a center point as the center of the circular arc, which is the midpoint of the center line of the adjacent auxiliary shaft mounting hole 13 on the right side. The right circular arc groove has a center point as the center of the circular arc, which is the midpoint of the center line of the adjacent auxiliary shaft mounting hole 13 on the left side. The two circular arc grooves converge and pass through at the lower part of the box, and the other end of the two circular arc grooves stops at the upper side wall of the box. The two steel wire ropes 9 pass through the adjacent auxiliary shaft 2 axis coplanar center line and the steel wire rope outlet hole 16 on both sides of the box 1, and then pass through the pulley 6 and the air door connection.

[0032] As shown in Figure 1 , Figure 2 , Figure 4 , the box cover 10 is bolted with the box 1 through the box cover fixing hole 15. When installing the cover plate, the auxiliary shaft 2 and the rolling shaft 3 need to be adjusted so that their ends are located in the auxiliary shaft mounting hole 13 and the guide rail groove 11 of the box cover 10, respectively.

[0033] As shown in Figure 1As shown, the rolling shaft 3 is moved to the right side arc segment of the guide rail groove 11 in the left air door closed case and the steel wire rope 9 is adjusted to be in tension, and the rolling shaft 3 is moved to the left side arc segment of the guide rail groove 11 in the right air door closed case and the steel wire rope 9 is adjusted to be in tension.

[0034] The working principle of the utility model is: when the right air door is opened, the rolling shaft 3 makes circular motion around the center line midpoint of the left side adjacent auxiliary shaft mounting hole 13 arc segment, and the left air door steel wire rope 9 is always in tension; when the left air door is opened, the right side steel wire rope 9 is always in tension according to the principle that the distance between any point on a circle and the center is always equal, and the right air door cannot be opened.

Claims

1. A coal mine underground air door interlocking device, comprising a box, a box cover, an auxiliary shaft, a rolling shaft, a single-arm sleeve, a triangular sleeve, a pulley, a pulley support, a pulley shaft, a steel wire rope, characterized in that: The single-arm sleeve is installed between the two sleeves of the triangular sleeve, the rolling shaft passes through the single-arm sleeve and the triangular sleeve, the two ends of the rolling shaft are installed in the guide rail groove of the box and the box cover, the end of the connecting rod of the single-arm sleeve is connected with one end of the steel wire rope, and the end face of the triangular connecting rod of the triangular sleeve is connected with the other steel wire rope; the two steel wire ropes pass through the left and right adjacent auxiliary shaft axis coplanar midlines of the box, then pass through the steel wire rope outlet holes on the upper side of the box, and then pass through the corresponding pulleys and are connected with the two side dampers respectively; the rolling shaft is moved to the left side of the guide rail groove in the arc range in the closed state of the damper to tension the right side steel wire rope, the rolling shaft is moved to the right side of the guide rail groove in the arc range in the closed state of the damper to tension the left side steel wire rope, and the rolling shaft is moved to the lowest point of the guide rail groove under the gravity when the two side dampers are closed, and the principle that the distance between any point on a circle and the center of the circle is equal is used, so that the steel wire rope connected with the damper on the other side is always in the tension state when the damper on one side is opened, and the damper locking is realized.

2. An underground coal mine air door interlock as defined in claim 1 wherein: The thickness of the box steel plate is not less than 10 mm, the bottom plate is not arranged at the lower part of the box, the wall plates are arranged at the upper side, the left side and the right side of the box, the two steel wire rope outlet holes are arranged on the upper side wall plate of the box, the box cover fixing holes are arranged on the wall plate, the two box fixing plates are connected on the upper side of the outer part of the box, the box fixing holes are arranged in the middle part of the box fixing plate, the box fixing holes are arranged on the lower side of the inner part of the box, the four auxiliary shaft mounting holes are arranged on the upper side sealing plate of the box, and the two arc guide rail grooves are connected and communicated in the middle part of the box.

3. An underground coal mine air door interlock as defined in claim 1 wherein: The cover plate fixing holes corresponding to the box are arranged on the upper side, the left side and the right side of the box cover, the thickness of the box cover steel plate is not less than 10 mm, the auxiliary shaft mounting holes corresponding to the box are arranged on the upper side of the box cover, and the guide rail groove corresponding to the box is arranged in the middle part of the box cover.

4. An underground coal mine air door interlock as defined in claim 1 wherein: The diameter of the middle part of the rolling shaft is larger than that of the two ends, the length of the middle part of the rolling shaft is greater than the sum of the lengths of the triangular sleeve and the single-arm sleeve by 2 mm, the length of the end part of the rolling shaft is equal to the thickness of the box steel plate, the diameter of the middle part of the rolling shaft is smaller than the inner wall diameter of the triangular sleeve and the single-arm sleeve by 1 mm, and the diameter of the middle part of the rolling shaft at the two ends is smaller than the vertical distance between the two arc surfaces of the guide rail groove by 1 mm, so as to facilitate assembly.

5. An underground coal mine air door interlock as defined in claim 1 wherein: the air door interlock is mounted on the air door. The triangular sleeve is composed of two sleeves and a triangular connecting rod connected with the sleeves, a single-arm sleeve assembly space is arranged between the two sleeves, and the triangular sleeve can move around the rolling shaft in a circumferential direction after being assembled with the rolling shaft.

6. An underground coal mine air door interlock as defined in claim 1 wherein: The single-arm sleeve is composed of one sleeve and a connecting rod connected with the sleeve, the single-arm sleeve is arranged in the middle of the triangular sleeve and is concentrically installed with the rolling shaft, and the single-arm sleeve can move around the rolling shaft in a circumferential direction after being assembled with the rolling shaft.

7. An underground coal mine air door interlock as defined in claim 1 wherein: The diameter of the middle part of the auxiliary shaft is larger than that of the two ends, the auxiliary shaft is mounted in the auxiliary shaft mounting holes of the box and the box cover, and the auxiliary steel wire rope slides.

8. An underground coal mine air door interlock as defined in claim 1 wherein: The diameter of the steel wire rope is equal to the distance between the adjacent auxiliary shafts.

9. An underground coal mine air door interlock as defined in claim 1 wherein: The guide rail groove is composed of two arc grooves, the midpoint of the connecting line of the centers of the adjacent auxiliary shaft mounting holes on the left side of the box is the center of the right side arc groove, the midpoint of the connecting line of the centers of the adjacent auxiliary shaft mounting holes on the right side of the box is the center of the left side arc groove, the radius of the arc groove is determined according to the opening degree of the damper, the two arc grooves are connected and communicated at the lower part of the box, the other ends of the two arc grooves stop at the upper wall plate of the box, and the movement path of the rolling shaft is limited by the rail surface of the guide rail groove.

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