Blasting flying stone protection curtain

Abstract

The utility model relates to a blasting flying stone protection curtain. The blasting flying stone protection curtain comprises a supporting frame, a plurality of protection curtain units, a retracting and releasing mechanism and a stop lever. The supporting frame is wholly in an n shape and comprises a telescopic beam and two vertical frames connected with the two ends of the telescopic beam respectively. The protective curtain units are sequentially in butt joint to form a protective curtain set. Stop lever bayonets are formed in the two vertical frames, the stop lever is detachably and transversely installed in the two stop lever bayonets, and when the strip-shaped curtain pieces of the protective curtain unit are impacted by external force, the lower sections of the strip-shaped curtain pieces can abut against the stop lever. The number of the protection curtain units can be increased or decreased according to the requirement of a site construction scene, the length of the telescopic beam is adjusted according to the length of the protection curtain set, and therefore the blasting flying stone protection curtain can be suitable for tunnel blasting construction within a certain width range. When the transport vehicle transfers earthwork, the folding and unfolding mechanism can fold the strip-shaped curtain pieces, so that the transport vehicle can pass through the lower portion of the supporting frame, and the blasting flying stone protection curtain does not need to be moved away or dismantled.

Description

TECHNICAL FIELD

[0001] The utility model relates to road and bridge construction protection equipment technical field, concretely relates to a blasting fly rock protection curtain. BACKGROUND

[0002] Blasting fly rock protection curtain is mainly used in mining, building, tunnel and other blasting occasions to prevent fly rock from hurting people or damaging equipment. At present, the blasting fly rock protection curtain applied in tunnel blasting occasions mainly consists of a support frame and a plurality of strip curtain pieces hung on the support frame. Since the width of the blasting fly rock protection curtain is fixed, it cannot well adapt to tunnel blasting construction of different widths. In addition, when the transport vehicle shifts earthwork, the blasting fly rock protection curtain at the tunnel portal needs to be removed to leave a passage, which results in that the blasting fly rock protection curtain at the portal needs to be repeatedly arranged, wasting manpower. CONTENT OF THE UTILITY MODEL

[0003] In view of the above problems, the utility model is provided to overcome the above problems or at least partially solve the above problems.

[0004] The blasting fly rock protection curtain comprises a support frame, a plurality of protection curtain units, a retracting mechanism and a blocking rod. The support frame is generally in the shape of a Chinese character, and comprises an extension beam and two vertical stands connected to two ends of the extension beam. The protection curtain units are sequentially butted to form a protection curtain group, and the length of the extension beam is adjusted according to the length of the protection curtain group. Each protection curtain unit comprises a horizontal rod and a plurality of strip curtain pieces arranged at intervals along the length direction of the horizontal rod. The horizontal rods are sequentially butted. One end of each strip curtain piece is fixedly connected to the outer surface of the horizontal rod. The retracting mechanism is connected to the end of the horizontal rod of the protection curtain unit on one side in the protection curtain group, and is used to drive the horizontal rod to rotate to simultaneously retract and release each strip curtain piece. The vertical stands are each formed with a blocking rod socket, and the blocking rod is detachably installed in the two blocking rod sockets in the transverse direction. When the strip curtain piece is impacted by external force, the lower section of the strip curtain piece can be supported on the blocking rod.

[0005] In one embodiment, the end of one of the two butted horizontal rods is formed with a threaded hole extending along the length direction of the horizontal rod and a positioning ring protruding outward, and the end of the other horizontal rod is formed with a positioning boss, a bolt chamber for accommodating a bolt and a through hole passing through the end surface of the end of the horizontal rod and communicating with the bolt chamber. The positioning ring and the positioning boss are matched to prevent the two horizontal rods from rotating relative to each other, and the root of the bolt is threadedly connected to the through hole and the threaded hole.

[0006] In one embodiment, of the two mating crossbars, one crossbar has a threaded hole and a positioning hole extending along the length of the crossbar at its end; the other crossbar has a positioning boss, a bolt chamber for accommodating a bolt, and a through hole that passes through the end face of the crossbar and communicates with the bolt chamber; the positioning hole and the positioning boss cooperate to prevent the two crossbars from rotating relative to each other, and the root of the bolt passes through the through hole and is threaded into the threaded hole.

[0007] In one embodiment, both of the uprights are provided with wheels at their bottom; the blasting debris protection curtain also includes a positioning rod, which is installed at the bottom of the uprights via a conduit and can be inserted into the ground.

[0008] In one embodiment, the traveling wheel is a swivel wheel.

[0009] In one embodiment, the telescopic beam includes two first beams respectively fixedly connected to corresponding uprights, and a second beam simultaneously sleeved with the two first beams. The two ends of the second beam are sleeves into which the first beams extend. The sleeves are formed with a plurality of through holes arranged sequentially at intervals along the length direction. Both first beams are provided with locking pins that can extend into the through holes.

[0010] In this utility model of a protective curtain against flying debris, the number of curtain units can be increased or decreased according to the needs of the on-site construction scenario, and the length of the telescopic beam can be adjusted according to the length of the protective curtain assembly. Therefore, the protective curtain can be applied to tunnel blasting operations within a certain width range. When the transport vehicle moves the excavated soil, the retraction mechanism can retract each strip of curtain, allowing the transport vehicle to pass under the supporting frame without needing to remove or dismantle the protective curtain. Attached Figure Description

[0011] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0012] Figure 1 This is a schematic diagram of the structure of a protective curtain against flying rocks during blasting, as an exemplary embodiment of the present invention.

[0013] Figure 2 for Figure 1 A schematic diagram of the structure of the protective curtain against flying debris from another perspective;

[0014] Figure 3 for Figure 1 The diagram shows a structural schematic of the protective curtain against flying debris from another perspective.

[0015] Figure 4 For Figure 1 Another perspective structural schematic view of the blasting fly rock protection curtain is shown in the figure.

[0016] Figure 5 The structural schematic view of the two pairs of cross bars is shown in the figure.

[0017] Figure 6 The structural schematic view of the two pairs of cross bars in another embodiment is shown in the figure.

[0018] The figure mark description: 1, protection curtain unit; 2, folding and unfolding mechanism; 3, blocking rod; 4, telescopic beam; 5, vertical stand; 6, cross bar; 7, strip curtain piece; 8, first beam body; 9, second beam body; 10, locking pin; 11, threaded hole; 12, positioning ring; 13, positioning boss; 14, bolt; 15, bolt chamber; 16, positioning hole; 17, blocking rod bayonet; 18, walking wheel; 19, positioning rod; 20, guide pipe. DETAILED DESCRIPTION

[0019] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application. Those skilled in the art can make various changes, modifications, replacements and variations to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

[0020] In the description of the present application, the terms "center", "longitudinal", "transverse", "length", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0021] In addition, the terms "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In addition, the terms "include", "contain" and any variations thereof are intended to cover non-exclusive inclusion.

[0022] In the description of the utility model, it is necessary to explain that, unless there is definite stipulation and limitation, the term "mounting", "connection" should be broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can be indirectly connected through the intermediate medium, can be the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to specific circumstances.

[0023] Below, a blasting fly rock protection curtain according to an embodiment of the utility model is described with reference to the drawings.

[0024] Referring to Figures 1 to 4 , a blasting fly rock protection curtain according to an embodiment of the utility model, its support frame, several protection curtain units 1, retraction mechanism 2 and baffle rod 3. The support frame is generally in the shape of a square, which includes telescopic beam 4 and two vertical stands 5 connected to the two ends of telescopic beam 4 respectively. Telescopic beam 4 and vertical stand 5 can both be steel structures. Protection curtain units 1 are connected in sequence to form a protection curtain group, and the number of protection curtain units 1 can be increased or decreased according to the specific construction scene, and the number of protection curtain units 1 is not limited in this embodiment. The length of telescopic beam 4 is adjusted according to the length of the protection curtain group, for example, when the number of protection curtain units 1 needs to be increased due to the site construction scene, telescopic beam 4 needs to be lengthened to the corresponding length, and for example, when the number of protection curtain units 1 needs to be reduced due to the site construction scene, telescopic beam 4 needs to be retracted to the corresponding length, so that the blasting fly rock protection curtain of this embodiment can be applied to tunnel blasting construction within a certain width range.

[0025] Specifically, the protection curtain unit 1 includes a horizontal rod 6 and a plurality of strip-shaped curtain pieces 7 arranged at intervals along the length direction of the horizontal rod 6. Each horizontal rod 6 is connected in sequence, and one end of each strip-shaped curtain piece 7 is fixedly connected to the outer surface of the horizontal rod 6. The strip-shaped curtain piece 7 can be made of rubber, or made of fiber cloth, or made of composite material or other suitable material, and the strip-shaped curtain piece 7 has a certain flexibility, which can be wound or unwound when the horizontal rod 6 is rotated. The interval between the strip-shaped curtain pieces 7 can release part of the energy of the shock wave generated by blasting.

[0026] Telescopic beam 4 includes two first beam bodies 8 fixedly connected to corresponding vertical stands 5 respectively, and a second beam body 9 sleeved with the two first beam bodies 8, and the two ends of the second beam body 9 are sleeve pipes for the first beam bodies 8 to extend into, the sleeve pipes are formed with a plurality of through holes arranged at intervals along the length direction, and the two first beam bodies 8 are provided with locking pins 10 capable of extending into the through holes, and the length of telescopic beam 4 is locked by the cooperation of the locking pins 10 and the through holes.

[0027] Now referring toFigure 5 In the present embodiment, the end of one of the two cross bars 6 is formed with a threaded hole 11 extending along the length of the cross bar 6, and a positioning ring 12 protruding outwardly; the end of the other cross bar 6 is formed with a positioning boss 13, a bolt chamber 15 for accommodating a bolt 14, and a through hole passing through the end face of the end of the cross bar 6 and communicating with the bolt chamber 15. The positioning ring 12 and the positioning boss 13 cooperate to prevent the two cross bars 6 from rotating relative to each other. Specifically, the central axis of the positioning boss 13, the central axis of the positioning ring 12, and the central axis of the cross bar 6 coincide, the outer periphery of the cross section of the positioning boss 13 is a regular polygon, and the inner periphery of the cross section of the positioning ring 12 is a corresponding regular polygon. The cooperation of the positioning ring 12 and the positioning boss 13 can prevent the two cross bars 6 from rotating relative to each other. The root of the bolt 14 passes through the through hole and is screwed into the threaded hole 11, and the two cross bars 6 are fastened together by the bolt 14.

[0028] Now referring to Figure 6 In another embodiment, the end of one of the two cross bars 6 is formed with a threaded hole 11 extending along the length of the cross bar 6, and a positioning hole 16; the end of the other cross bar 6 is formed with a positioning boss 13, a bolt chamber 15 for accommodating a bolt 14, and a through hole passing through the end face of the end of the cross bar 6 and communicating with the bolt chamber 15. The positioning hole 16 and the positioning boss 13 cooperate to prevent the two cross bars 6 from rotating relative to each other. Specifically, the central axis of the positioning boss 13 coincides with the central axis of the positioning ring 12 and is parallel to (not coinciding with) the central axis of the cross bar 6. The cooperation of the positioning ring 12 and the positioning boss 13 can prevent the two cross bars 6 from rotating relative to each other. The root of the bolt 14 passes through the through hole and is screwed into the threaded hole 11, and the two cross bars 6 are fastened together by the bolt 14.

[0029] Now returning to Figure 1 The winding and unwinding mechanism 2 is connected to the end of the cross bar 6 of the shielding curtain unit 1 on one side of the shielding curtain group, and is used to drive the cross bar 6 to rotate so as to simultaneously wind and unwind each strip-shaped curtain piece 7. For example, when the cross bar 6 rotates in a first direction, each strip-shaped curtain piece 7 is wound, and when the cross bar 6 rotates in a second direction opposite to the first direction, each strip-shaped curtain piece 7 is unwound. The winding and unwinding mechanism 2 can be composed of a motor and a speed reducer, and the output end of the speed reducer is connected to the end of the cross bar 6 of the shielding curtain unit 1 on one side of the shielding curtain group. The cross bars 6 of the shielding curtain units 1 on both sides can be supported by bearings mounted on the telescopic beams 4 or the bearing seats of the two stands 5. When the transport vehicle is moving earth, the winding and unwinding mechanism 2 can wind up each strip-shaped curtain piece 7, so that the transport vehicle can pass under the support frame, thereby eliminating the need to move or remove the blasting flyrock shielding curtain.

[0030] Now referring to Figure 1 and Figure 3, both of the stands 5 are formed with a blocking rod notch 17, the blocking rod 3 is detachably transversely installed in the two blocking rod notches 17, when the strip curtain 7 is impacted by external force, the lower section can be abutted on the blocking rod 3, and the blocking rod 3 is used to offset part of the impact force. In the embodiment, the two blocking rod notches 17 are at the same height, when the transport vehicle shifts earthwork, the strip curtain 7 is folded and the blocking rod 3 is removed, the transport vehicle can pass below the support frame, so that the blasting flystone protection curtain does not need to be moved or removed.

[0031] In the embodiment, the bottom of each of the stands 5 is provided with a walking wheel 18, preferably, the walking wheel 18 is a universal wheel, and the walking wheel 18 is convenient for the overall movement of the blasting flystone protection curtain. The blasting flystone protection curtain further comprises a positioning rod 19, the positioning rod 19 is installed at the lower part of the stand 5 through a conduit 20, and the positioning rod 19 can be inserted into the ground. The conduit 20 can be a steel pipe, and the inner diameter of the steel pipe is slightly larger than the outer diameter of the positioning rod 19. The positioning rod 19 inserted into the ground can prevent the blasting flystone protection curtain from moving, and can prevent the blasting flystone protection curtain from being overturned by the shock wave generated by blasting. In the embodiment, the number of the positioning rods 19 is four, and two positioning rods 19 are installed at the lower part of each stand 5. Referring to Figure 1 The two positioning rods 19 located at the same stand 5 are arranged in front and back.

Claims

1. A flyrock protection screen for blasting, characterized by: The application relates to a blast fly rock protection curtain, which comprises a support frame, a plurality of protection curtain units, a winding and unwinding mechanism and a blocking rod.

2. The flyrock protection screen of claim 1, wherein: The support frame is generally in the shape of a square, and comprises a telescopic beam and two vertical stands connected to the two ends of the telescopic beam respectively; the protection curtain units are sequentially butted to form a protection curtain group, and the length of the telescopic beam is adjusted according to the length of the protection curtain group; each protection curtain unit comprises a horizontal rod and a plurality of strip-shaped curtain pieces arranged at intervals along the length direction of the horizontal rod; the horizontal rods are sequentially butted; one end of each strip-shaped curtain piece is fixedly connected to the outer surface of the horizontal rod; the winding and unwinding mechanism is connected to the end of the horizontal rod of the protection curtain unit located on one side of the protection curtain group, and is used for driving the horizontal rod to rotate so as to simultaneously wind and unwind the strip-shaped curtain pieces; the two vertical stands are both formed with blocking rod sockets, and the blocking rod is detachably transversely installed in the two blocking rod sockets; when the strip-shaped curtain pieces are impacted by external force, the lower section of the strip-shaped curtain pieces can be abutted on the blocking rod.

3. The flyrock protection screen of claim 1, wherein: In the two butted horizontal rods, the end of one horizontal rod is formed with a threaded hole extending along the length direction of the horizontal rod and a positioning ring protruding outward, the end of the other horizontal rod is formed with a positioning boss, a bolt chamber for accommodating a bolt and a through hole penetrating through the end surface of the end of the horizontal rod and communicating with the bolt chamber; the positioning ring and the positioning boss are matched to prevent the two horizontal rods from rotating relative to each other, and the root of the bolt is threadedly matched with the through hole and the threaded hole.

4. A flyrock protection screen according to any one of claims 1 to 3, characterised in that: In the two butted horizontal rods, the end of one horizontal rod is formed with a threaded hole extending along the length direction of the horizontal rod and a positioning hole; the end of the other horizontal rod is formed with a positioning boss, a bolt chamber for accommodating a bolt and a through hole penetrating through the end surface of the end of the horizontal rod and communicating with the bolt chamber; the positioning hole and the positioning boss are matched to prevent the two horizontal rods from rotating relative to each other, and the root of the bolt is threadedly matched with the through hole and the threaded hole.

5. The flyrock protection screen of claim 4, wherein: The bottom of each vertical stand is provided with a walking wheel; the blast fly rock protection curtain further comprises a positioning rod, the positioning rod is installed at the lower part of the vertical stand through a guide pipe, and the positioning rod can be inserted into the ground.

6. The flyrock protection screen of claim 5, wherein: The walking wheel is a universal wheel. The telescopic beam comprises two first beam bodies fixedly connected with the corresponding vertical stands respectively and a second beam body sleeved with the two first beam bodies simultaneously, the two ends of the second beam body are sleeve pipes for the first beam bodies to extend into, the sleeve pipes are formed with a plurality of through holes arranged at intervals along the length direction, and the two first beam bodies are both provided with locking pins capable of extending into the through holes.

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