Cartridge cutting device for tunnel blasting

Abstract

The utility model relates to the field of supporting structures, aims to solve the problems that in an existing supporting structure, screwing operation of steel plates is tedious, and screw holes between adjacent steel plates are difficult to align accurately, and provides a cartridge cutting device for tunnel blasting, which comprises a barrel, an elastic piece, a cutting blade and a push rod. A cutting blade is arranged at one end, close to an outlet of the barrel, of the inner wall of the barrel, the elastic part is arranged on the inner wall, on the top of the cutting blade, of the barrel, the push rod can be sleeved with the barrel and move along the central axis of the barrel, the push rod comprises a front end part, a rear end part and a push rod, and the bottom wall of the front end part is higher than the top wall of the cutting blade; the front end part is connected with the rod main body, and the diameter of the rod main body is larger than that of the front end part; the end, far away from the outlet of the barrel, of the elastic piece is closer to the rod body compared with the cutting piece. According to the utility model, the push rod is divided into two parts, and the front end part with smaller diameter can effectively avoid a cutting blade to feed a cartridge into a blast hole.

Description

Technical Field

[0001] The utility model relates to the field of tunnel blasting, in particular to a charge roll cutting device used for tunnel blasting. Background Art

[0002] Tunnels are the focus and key projects of highway and railway construction. With the development of railway construction and the advancement of science and technology, tunnel excavation methods have developed rapidly. The more commonly used excavation methods are drilling and blasting, shield method and tunnel boring machine method. Because the drilling and blasting method has strong adaptability to geological conditions and low excavation cost, it is particularly suitable for the construction of hard rock tunnels, broken rock tunnels and a large number of short tunnels. Therefore, the drilling and blasting method is still a commonly used tunnel excavation method at home and abroad. The method of excavating rocks by drilling, charging and blasting is referred to as the drilling and blasting method. This method has evolved from the early days of manually holding a drill and hammering holes, and using detonators to detonate individual explosive packs one by one, to drilling holes with a rock drilling rig or a multi-arm drilling rig, and applying blasting technologies such as millisecond blasting, pre-splitting blasting and smooth blasting. Before construction, the excavation method should be selected based on geological conditions, section size, support method, construction period requirements, construction equipment, technology and other conditions. The diameter of the explosive rolls produced by explosive factories is generally 32mm, while the hole diameter of existing rock drilling rigs or multi-arm drilling rigs is close to 50mm, resulting in insufficient coupling coefficient of the explosive rolls, affecting the blasting effect, and may even cause secondary blasting, extending the construction time.

[0003] The patent with publication number CN220074846U discloses a cutting device for tunnel light blasting hole cartridges. The cutting barrel can cut various cartridges to meet the charging requirements of each blast hole. However, the cut cartridges cannot be directly delivered into the blast hole through the device, and the charging operation is relatively cumbersome.

[0004] The patent with publication number CN220136175U discloses a rapid cutting device for medicine rolls suitable for tunnel construction, which is provided with a cylinder at the mouth of the blast hole for the medicine rolls to pass through, and a blade is arranged in the cylinder. After the medicine roll is cut, the medicine roll can be directly pushed into the blast hole by a push rod, but since the blade is arranged in the cylinder, the blade will hinder or even damage the push rod. Utility Model Content

[0005] The utility model aims to provide a charge roll cutting device for tunnel blasting, which solves the problem that a blade will hinder or even damage the push rod when the push rod is used to push the charge roll into a blast hole after the charge roll is cut, and realizes the positioning of the push rod during its movement.

[0006] The embodiments of the present invention are implemented by the following technical solutions:

[0007] A drug roll cutting device for tunnel blasting comprises a cylinder, an elastic member, a cutting blade and a push rod, wherein the inner wall of the cylinder is provided with a cutting blade at one end close to the outlet thereof, the elastic member is arranged on the inner wall of the cylinder at the top of the cutting blade, the push rod can be sleeved in the cylinder and move along the central axis of the cylinder, the push rod comprises: a front end portion, the bottom wall of the front end portion is higher than the top wall of the cutting blade; a rod body, the front end portion is connected to the rod body, the diameter of the rod body is larger than the diameter of the front end portion; the end of the elastic member away from the outlet of the cylinder is closer to the rod body than the cutting blade.

[0008] Preferably, the elastic member comprises: a double-arm torsion spring, one arm of which is connected to the inner wall of the cylinder; and a pressing plate, the other arm of which is connected to the pressing plate.

[0009] Preferably, the free end of the pressing sheet extends toward an end away from the outlet of the cylinder.

[0010] Preferably, the diameter of the front end portion gradually decreases from the proximal end to the distal end.

[0011] Preferably, the elastic member further comprises: a guide sheet, to which the free end of the pressing sheet is connected; the free end of the guide sheet gradually moves away from the central axis of the cylinder in the process of moving away from the cylinder outlet.

[0012] Preferably, a first connecting plate is provided on the outer wall of one end of the cylinder away from the outlet.

[0013] Preferably, it further comprises: a rotating cylinder, wherein the outer wall of the rotating cylinder is provided with a second connecting plate, the first connecting plate and the second connecting plate are rotatably connected via a pin shaft, and the push rod can be internally sleeved in the rotating cylinder.

[0014] Preferably, the pin shaft and the cutting blade are located on opposite sides of the elastic member.

[0015] Preferably, the rod body is provided with a slider; the inner walls of the cylinder body and the rotating cylinder are provided with slide rails cooperating with the slider, and the slide rails include: an axial slide rail; a circumferential slide rail, and the circumferential slide rail is connected to one end of the axial slide rail away from the rotating cylinder.

[0016] The utility model has at least the following beneficial effects:

[0017] The utility model sets the push rod into two parts, and the front end with a smaller diameter can effectively avoid the cutting blade to send the medicine roll into the blast hole; because the cylinder is inserted into the blast hole during operation, the movement of the push rod is not visible, and the utility model also improves the position of the elastic member so that it encounters the end of the rod body earlier than the cutting blade, which has two advantages: first, when the resistance of the elastic member to the push rod is felt, it prompts that the pushing operation of the push rod can be ended and the medicine roll has escaped from the cylinder; second, the end of the rod body with a larger diameter will not contact the cutting blade during the movement, thereby avoiding damage to both. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 This is a schematic diagram of the structure of the cartridge cutting device for tunnel blasting provided by the utility model;

[0020] Figure 2 It is a structural schematic diagram of Example 2;

[0021] Figure 3 It is a structural schematic diagram of Example 3;

[0022] Figure 4 is a schematic diagram of the structure of the elastic member;

[0023] Figure 5 It is a structural schematic diagram of Example 4;

[0024] Figure 6 for Figure 5 Detail of A in the middle;

[0025] Figure 7 It is a structural schematic diagram of Example 5;

[0026] Figure 8 This is a demonstration diagram of the use of the rotating drum;

[0027] Fig. 9 This is a schematic diagram of the structure after improving the pin position;

[0028] Fig.10 It is a schematic diagram of the structure of the medicine roll cutting device after the slide rail is set;

[0029] Fig.11 A schematic diagram of a slide rail;

[0030] Icon: 1-cylinder, 11-first connecting plate, 2-elastic member, 21-double-arm torsion spring, 22-pressing plate, 23-guide plate, 3-cutting plate, 4-push rod, 41-front end portion, 42-rod body, 5-rotating cylinder, 51-second connecting plate, 6-pin shaft, 7-slider, 8-slide rail, 81-axial slide rail, 82-circumferential slide rail, 9-stop block. DETAILED DESCRIPTION

[0031] In order to make the purpose, method scheme and advantages of the embodiments of the utility model clearer, the method scheme in the embodiments of the utility model is clearly and completely described. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. The components of the embodiments of the utility model described and shown in the drawings herein can be arranged and designed in various different configurations.

[0032] Example 1

[0033] like Figure 1 As shown, a drug roll cutting device for tunnel blasting comprises a cylinder 1, an elastic member 2, a cutting blade 3 and a push rod 4. The inner wall of the cylinder 1 is provided with a cutting blade 3 at one end near the outlet thereof. The cutting blade 3 can be as shown in FIG. Figure 1 As shown, a bevel blade is provided at one end facing the push rod 4, and a horizontal blade is provided at the top of the cutting blade 3. The bevel blade ensures that the cutting blade 3 has a certain height, and better guides the medicine roll to slide along the blade of the cutting blade 3. The elastic member 2 is provided on the inner wall of the cylinder 1 at the top of the cutting blade 3. The push rod 4 can be sleeved in the cylinder 1 and move along the central axis of the cylinder 1. The push rod 4 includes: a front end 41, the bottom wall of the front end 41 is higher than the top wall of the cutting blade 3; the top wall of the front end 41 can be lower than the elastic member 2 to avoid the elastic member 2 hindering the front end 41 from moving. A rod body 42, the front end 41 is connected to the rod body 42, the diameter of the rod body 42 is larger than the diameter of the front end 41; the end of the elastic member 2 away from the outlet of the cylinder 1 is closer to the rod body 42 than the cutting blade 3.

[0034] In the specific implementation process, the elastic member 2 can be made of shrapnel or rubber layer. After the drilling of the blasthole is completed, the detonator, explosives and gun mud are loaded according to the design. When the gun roll cutting device provided by the utility model is used to load the gun roll, the barrel 1 is first inserted into the blasthole. A limiter, such as a baffle, can be set at the entrance end of the barrel 1, so that the limiter abuts against the rock wall to prevent the barrel 1 from completely entering the blasthole. Then the gun roll is inserted into the barrel 1, and the push rod 4 is used to push the gun roll. When the gun roll passes through the cutting blade 3 and escapes from the barrel 1, its outer packaging is completely cut open. Finally, the gun stick is used to squeeze the cut gun roll in the blasthole, so that the explosive fills the blasthole to improve the blasting effect. When the gun roll passes through the cutting blade 3, the elastic member 2 can give the gun roll a force toward the cutting blade 3, which is conducive to the cutting of the gun roll packaging. The length of the front end 41 needs to be sufficient to extend out of the barrel 1 when the elastic member 2 abuts against the rod body 42. The movement of the push rod 4 ends when the elastic member 2 abuts against the rod body 42 , and at this time, the rod body 42 is still at a certain distance from the cutting blade 3 .

[0035] Example 2

[0036] In order to make the elastic member 2 better squeeze the medicine roll and provide a clearer stop prompt during the movement of the push rod 4, improvements are made on the basis of embodiment 1, such as Figure 2-4 As shown, in this embodiment, the elastic member 2 includes: a double-arm torsion spring 21, one arm of the double-arm torsion spring 21 is connected to the inner wall of the cylinder 1, and the double-arm torsion spring 21 can be as shown in FIG. Figure 4 As shown in the figure, two pressing plates 22 are provided, and the other arm of the double-arm torsion spring 21 is connected to the pressing plate 22. The two double-arm torsion springs 21 are respectively arranged on both sides of the pressing plate 22 to ensure the stability of the pressing plate 22. The two double-arm torsion springs 21 can also be as shown in the figure. Figure 4 The connection shown is integrated, which improves the overall stability of the elastic member 2.

[0037] In the specific implementation process, Figure 2 or Figure 3 As shown, the deformation recovery performance of the double-arm torsion spring 21 is utilized to apply squeezing force to the medicine roll when the medicine roll passes through, so as to facilitate the cutting blade 3 to cut the medicine roll. At the same time, compared with the soft rubber layer, the hard pressing sheet 22 directly limits the push rod 4 when it contacts the rod body 42 and better feedbacks the reaction force, so that the operator can feel the prompt to stop pushing the push rod 4.

[0038] Example 3

[0039] In order to reduce the obstruction of the elastic member 2 when the push rod 4 exits the cylinder 1, improvements are made on the basis of embodiment 2, such as Figure 3 As shown, in this embodiment, the free end of the pressing sheet 22 extends toward an end away from the outlet of the cylinder 1 .

[0040] In the specific implementation process, the free end of the pressing piece 22 refers to the end away from the rotation axis. Figure 2 As shown in the figure, the direction of the pressing sheet 22 is set. During the withdrawal of the push rod 4, the friction between the pressing sheet 22 and the push rod 4 will give the pressing sheet 22 a rightward force, so that the pressing sheet 22 tends to press the push rod 4 and hinder the withdrawal of the push rod 4. Therefore, this embodiment adopts Figure 3 As shown in the direction of the pressing sheet 22, when the pressing sheet 22 is subjected to a rightward force, the pressing sheet 22 tends to move away from the push rod 4, and the withdrawal operation of the push rod 4 is faster and more labor-saving.

[0041] Example 4

[0042] In order to further facilitate the withdrawal operation of the push rod 4, improvements are made on the basis of Example 3, such as Figure 5-6 As shown, in this embodiment, the diameter of the front end portion 41 gradually decreases from the proximal rod end to the distal rod end.

[0043] In the specific implementation process, the proximal rod end refers to the end close to the rod body 42, and the distal rod end refers to the end away from the rod body 42. Figure 5 As shown, the front end portion 41 is in the shape of a boss as a whole. When the push rod 4 is withdrawn from the cylinder 1, the gap between the front end portion 41 and the inner wall of the cylinder 1 becomes larger and larger, which reduces the obstruction of the tablet 22 to the push rod 4 when it is withdrawn. If the diameter of the front end portion 41 is set very small, it can theoretically avoid the obstruction of the tablet 22 when the push rod 4 is withdrawn, but it will be disadvantageous to push the medicine roll and completely remove the medicine roll after cutting.

[0044] Example 5

[0045] In order to prevent the tablet press 22 from hindering the progress of the medicine roll, improvements are made on the basis of Example 3, such as Figure 7 As shown, in this embodiment, the elastic member 2 further includes: a guide sheet 23, and the free end of the pressing sheet 22 is connected to the guide sheet 23; the free end of the guide sheet 23 gradually moves away from the central axis of the cylinder 1 in the process of moving away from the outlet of the cylinder 1.

[0046] In the specific implementation process, if Figure 3 As shown in the figure, only the pressing tablet 22 is provided. When the diameter of the medicine roll is larger than the distance between the free end of the pressing tablet 22 and the lower inner wall in the figure, the medicine roll will be hindered by the pressing tablet 22 during the movement to the left, and it is difficult to continue to move forward. Therefore, this embodiment adopts Figure 7 The guide piece 23 tilted upward as shown in the figure first squeezes the medicine roll through the guide piece 23, so that the medicine roll can move along the outer side wall of the guide piece 23 and the pressing piece 22, while ensuring sufficient squeezing force without hindering the movement of the medicine roll.

[0047] Example 6

[0048] In order to prevent the barrel 1 from completely entering the blast hole and being unable to be taken out, improvements are made on the basis of embodiments 1-5, such as Figure 7 As shown, in this embodiment, a first connecting plate 11 is provided on the outer wall of one end of the cylinder 1 away from the outlet.

[0049] In a specific implementation process, the first connecting plate 11 may be an annular plate, and the outer diameter of the first connecting plate 11 is larger than the diameter of the blast hole. The first connecting plate 11 cannot enter the blast hole, so the device will not fall into the blast hole as a whole.

[0050] Example 7

[0051] In order to better place the push rod 4, improvements are made on the basis of Example 6, such as Figure 7 As shown, in this embodiment, it also includes: a rotating cylinder 5, the inner diameter of which can be consistent with the inner diameter of the cylinder body 1. The outer wall of the rotating cylinder 5 is provided with a second connecting plate 51, the first connecting plate 11 and the second connecting plate 51 are rotatably connected through a pin 6, and the push rod 4 can be sleeved inside the rotating cylinder 5.

[0052] In the specific implementation process, the rotating drum 5 can be Figure 8 As shown in FIG. 1 , the push rod 4 can be rotated as shown in FIG. Figure 7 As shown, a stopper 9 is provided, and then a stopper ring is provided at the end of the rotating cylinder 5 . The cooperation between the stopper 9 and the stopper ring prevents the push rod 4 from completely escaping from the rotating cylinder 5 , but can completely escaping from the cylinder body 1 .

[0053] During operation, after inserting the barrel 1 into the blast hole, Figure 8 As shown, the rotating cylinder 5 is rotated to expose the cylinder body 1, and then the medicine roll is filled in the cylinder body 1, the rotating cylinder 5 is reset, and the push rod 4 is inserted into the cylinder body 1 to push the medicine roll to move.

[0054] Example 8

[0055] In order to avoid the need for additional fixing operation after the rotating drum 5 rotates, improvements are made based on Example 7, such as Fig. 9 As shown, in this embodiment, the pin shaft 6 and the cutting blade 3 are both located on opposite sides of the elastic member 2 .

[0056] In the specific implementation process, the elastic member 2 is located on the upper side of the cylinder 1, and the cutting blade 3 and the pin 6 are located at the lower side. Figure 8 The structure shown in the figure requires workers to support the state of the rotating drum 5. Fig. 9 As shown, the rotating cylinder 5 can present the state shown in the figure under the action of its own gravity. After the rotating cylinder 5 is reset, since the push rod 4 is simultaneously sleeved in the cylinder body 1 and the rotating cylinder 5, the rotating cylinder 5 will not rotate under the action of gravity.

[0057] Example 9

[0058] In order to further arrange the push rod 4, improvements are made on the basis of Example 6, such as Fig.10 and Fig.11 As shown, in this embodiment, the rod body 42 is provided with a slider 7; the inner walls of the cylinder body 1 and the rotating cylinder 5 are provided with a slide rail 8 that cooperates with the slider 7, and the slide rail 8 includes: an axial slide rail 81; a circumferential slide rail 82, and the circumferential slide rail 82 is connected to the end of the axial slide rail 81 away from the rotating cylinder 5.

[0059] In the specific implementation process, the length direction of the axial slide rail 81 is consistent with the central axis of the cylinder 1, and the circumferential slide rail 82 is arranged along the circumference of the cylinder 1. After the device is used, the push rod 4 can slide along the axial slide rail 81. When the slider 7 reaches the end of the axial slide rail 81, the push rod 4 is rotated so that the slider 7 enters the circumferential slide rail 82. The travel route of the slider 7 can be referred to Fig.11 As shown, when the slider 7 enters the circumferential slide rail 82, the push rod 4 can no longer move along the axial direction of the cylinder 1, preventing the push rod 4 from slipping out of the cylinder 1. At this time, the push rod 4 is placed in the inner cavity of the cylinder 1. When the technical solution of this embodiment is adopted, the aforementioned block 9 and the retaining ring are no longer needed. The slide rail 8 restricts the position of the slider 7, which can also prevent the push rod 4 from completely slipping out of the cylinder 1 and the rotating cylinder 5.

[0060] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A drug roll cutting device for tunnel blasting, comprising a barrel, an elastic member, a cutting blade and a push rod, wherein the inner wall of the barrel is provided with a cutting blade at one end close to the outlet thereof, the elastic member is provided on the inner wall of the barrel at the top of the cutting blade, the push rod can be sleeved inside the barrel and move along the central axis of the barrel, characterized in that: The push rod comprises: A front end portion, wherein the bottom wall of the front end portion is higher than the top wall of the cutting blade; The front end portion is connected to the rod body, and the diameter of the rod body is larger than the diameter of the front end portion; the end of the elastic member away from the outlet of the cylinder is closer to the rod body than the cutting blade.

2. The cartridge cutting device for tunnel blasting according to claim 1, characterized in that: The elastic member comprises: A double-arm torsion spring, one arm of which is connected to the inner wall of the cylinder; A pressing plate, the other arm of the double-arm torsion spring is connected to the pressing plate.

3. The cartridge cutting device for tunnel blasting according to claim 2, characterized in that: The free end of the pressing sheet extends toward an end away from the outlet of the cylinder.

4. The cartridge cutting device for tunnel blasting according to claim 3, characterized in that: The diameter of the front end portion gradually decreases from the proximal end to the distal end.

5. The cartridge cutting device for tunnel blasting according to claim 3, characterized in that: The elastic member further comprises: A guide sheet, the free end of the pressing sheet is connected to the guide sheet; the free end of the guide sheet gradually moves away from the central axis of the cylinder in the process of moving away from the cylinder outlet.

6. The cartridge cutting device for tunnel blasting according to any one of claims 1 to 5, characterized in that: A first connecting plate is disposed on the outer wall of one end of the cylinder away from the outlet.

7. The cartridge cutting device for tunnel blasting according to claim 6, characterized in that: Also includes: A rotating cylinder, wherein a second connecting plate is disposed on the outer wall of the rotating cylinder, the first connecting plate and the second connecting plate are rotatably connected via a pin shaft, and the push rod can be internally sleeved in the rotating cylinder.

8. The cartridge cutting device for tunnel blasting according to claim 7, characterized in that: The pin shaft and the cutting blade are both located on opposite sides of the elastic member.

9. The cartridge cutting device for tunnel blasting according to claim 6, characterized in that: The rod body is provided with a slider; the inner walls of the cylinder body and the rotating cylinder are both provided with a slide rail that cooperates with the slider, and the slide rail includes: Axial slide rail; A circumferential slide rail is connected to an end of the axial slide rail away from the rotating drum.

Images