A detonator tensile test device

Abstract

The present invention relates to the technical field of detonator testing, in particular to a detonator tensile test device, comprising two vertically arranged support plates, the two support plates being parallel to each other; a pipe fitting for accommodating a leg line passing therethrough is horizontally fixedly connected to the middle of one of the support plates, the pipe fitting passes through the support plate, an L-shaped supporting plate is rotatably mounted on the outer wall of the pipe fitting, an annular gear is sleeved on the outside of the pipe fitting, the annular gear is fixedly connected to the supporting plate, an aluminum plate is fixedly connected to the supporting plate for supporting the leg line; the detonator tensile test device provided by the present invention can simulate the radial impact force on the detonator leg line in an underwater environment, and can simulate the temperature of the underwater environment through a coil, and simulate the impact of impurities in water on the leg line through the impact of a small ball on the leg line, thereby greatly improving the accuracy of the test result.

Description

Technical Field

[0001] The invention relates to the technical field of detonator testing, in particular to a detonator tensile test device. Background Art

[0002] With the development of water conservancy projects, underwater foundation construction issues have become increasingly important. Among them, underwater foundation excavation has always been the main key point of construction progress. In order to increase the construction rate, underwater blasting is often used in the prior art to speed up the progress of underwater foundation excavation.

[0003] like Figure 1 As shown, during the current implementation of underwater blasting, firstly, a blast hole for charging is opened on the underwater river bank, and after the blast hole is opened, explosives are loaded, and then the ignition end of the detonator 103 is inserted into the blast hole to seal the blast hole, and finally, the leg line 101 of the detonator 103 is connected in series with the busbar 102 of the detonation control assembly.

[0004] During the actual construction process, in order to improve the blasting efficiency, a plurality of blastholes are generally opened at intervals along the river bank when the blastholes are started. The construction personnel then load the explosives and detonator 103 into each blasthole in turn. Due to the difficulty of underwater construction, the loading of each blasthole takes a relatively long time. Therefore, before detonating the explosives, the leg line 101 of the detonator 103 loaded in the first blasthole will be subjected to the impact of the water flow for a long time. In order to prevent the leg line 101 of the detonator 103 from being damaged during this period, which may cause the explosives to fail to detonate correctly, the detonator 103 needs to be subjected to a tensile strength test in the laboratory before construction to ensure that the detonator 103 can meet the construction environment.

[0005] However, currently, when laboratories conduct tensile tests, most of the stretching equipment used can only axially stretch the leg line 101 of the detonator 103, and cannot simulate the radial impact force exerted by water flow on the leg line 101 of the detonator 103, resulting in a large deviation between the test results and the actual situation. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcoming in the prior art that the existing stretching equipment is difficult to simulate the stress condition of the detonator leg line in an underwater environment, and to propose a detonator tensile test device.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A detonator tensile test device is designed, comprising two vertically arranged support plates, the two support plates being parallel to each other;

[0009] A pipe fitting for accommodating the leg wire is fixedly connected horizontally in the middle of one of the support plates. The pipe fitting passes through the support plate. An L-shaped support plate is rotatably mounted on the outer wall of the pipe fitting. A ring gear is sleeved on the outside of the pipe fitting. The ring gear is fixedly connected to the support plate. An aluminum plate is fixedly connected to the support plate to support the leg wire.

[0010] An axis tube is fixedly connected to the middle part of another support plate, and the axis of the axis tube is in the same straight line as the axis of the pipe fitting; a circular shell is fixedly connected to the outer wall of the axis tube, and a first arc-shaped ventilation groove is provided on the inner end face of the shell; a constant pressure chamber with constant internal pressure is fixedly connected to the outer wall of the support plate; a connecting pipe is fixedly connected to the end face of the outer wall of the shell, and the connecting pipe connects the constant pressure chamber with the first ventilation groove; a rotating disk is rotatably installed in the shell, and a joint is fixedly connected to the end face of one end of the rotating disk, and the other end face of the rotating disk abuts against the inner end face of the shell and is provided with a second arc-shaped ventilation groove, and the joint is connected to the second ventilation groove, and an air pipe is connected to the joint, and an air outlet pipe is connected to the outer wall of the air pipe, and the air outlet pipe is aligned with the foot line on the support plate.

[0011] Preferably, a serpentine coil is fixedly connected to the surface of the support plate, and the coil is used to accommodate water flow passing therethrough, and the temperature of the aluminum plate is changed according to the temperature of the water flow.

[0012] Preferably, a stepper motor is fixedly connected to the support plate where the pipe is located, and a driving gear is fixedly connected to the output end of the stepper motor, and the driving gear matches the ring gear.

[0013] Preferably, a hopper for accommodating small balls is fixedly connected to the top of the support plate, the top of the hopper is hinged with a cover plate, the bottom of the hopper is connected to a feed hose, and the bottom end of the feed hose is connected to the air outlet pipe to transport the small balls in the hopper to the air outlet pipe.

[0014] Preferably, a collecting box is fixedly connected to the bottom of the support plate to collect the small balls, and a sliding plate is fixedly connected obliquely in the collecting box to transport the small balls to the bottom of the hopper.

[0015] Preferably, a wire clamp is fixed to the tail of the pipe to clamp and fix the end of the foot line.

[0016] The detonator tensile test device proposed in the present invention has the beneficial effect that: the detonator tensile test device provided by the present invention can simulate the radial impact force exerted on the detonator leg line in an underwater environment, and can simulate the temperature of the underwater environment through the coil, and simulate the impact of impurities in the water on the leg line through the impact of a small ball on the leg line, thereby greatly improving the accuracy of the test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of underwater blasting work.

[0018] Figure 2A schematic diagram of the structure of a detonator tensile test device proposed by the present invention Figure 1 .

[0019] Figure 3 A schematic diagram of the structure of a detonator tensile test device proposed by the present invention Figure 2 .

[0020] Figure 4 The figure is a left view of a detonator tensile test device proposed by the present invention.

[0021] Figure 5 A detonator tensile test device proposed by the present invention Figure 4 AA section view.

[0022] Figure 6 This is a structural schematic diagram of an aluminum plate of a detonator tensile test device proposed by the present invention.

[0023] Figure 7 A schematic diagram of the structure of the rotating disk and shell of a detonator tensile test device proposed by the present invention Figure 1 .

[0024] Figure 8 A schematic diagram of the structure of the rotating disk and shell of a detonator tensile test device proposed by the present invention Figure 2 .

[0025] In the figure: 101, foot line; 102, busbar; 103 detonator; 1, collecting box; 2, support plate; 3, pipe fitting; 4, ring gear; 5, wire clamp; 6, support plate; 7, aluminum plate; 8, air pipe; 9, outlet pipe; 10, coil; 11, joint; 12, rotating disk; 13, shell; 14, second ventilation groove; 15, first ventilation groove; 16, shaft tube; 17, wire tube; 18, clamping bolt; 19, hopper; 20, cover plate; 21, feed hose; 22, slide plate; 23, small ball; 24, stepping motor; 25, driving gear; 26, connecting pipe; 27, constant pressure chamber. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0027] Reference Figure 1-2 , a detonator tensile test device, comprising two vertically arranged support plates 2, the two support plates 2 are parallel to each other;

[0028] like Figure 4-6As shown, a pipe fitting 3 for accommodating the leg wire 101 is horizontally fixedly connected to the middle of one of the support plates 2, and the pipe fitting 3 passes through the support plate 2. An L-shaped support plate 6 is rotatably mounted on the outer wall of the pipe fitting 3. A ring gear 4 is sleeved on the outside of the pipe fitting 3, and the ring gear 4 is fixedly connected to the support plate 6. An aluminum plate 7 is fixedly connected to the support plate 6 to support the leg wire 101, and a wire clamp 5 is fixed to the tail of the pipe fitting 3 to clamp and fix the end of the leg wire 101; and a stepper motor 24 is fixedly connected to the support plate 2, and a driving gear 25 is fixedly connected to the output end of the stepper motor 24, and the driving gear 25 matches the ring gear 4.

[0029] When testing the leg wire 101 of the detonator 103, first place the detonator 103 on the aluminum plate 7, then pass one end of the leg wire 101 through the pipe 3 and clamp it on the wire clamp 5 at the tail of the pipe 3, and guide the other end of the leg wire 101 to another support plate 2.

[0030] like Figure 6-Figure 8 As shown, another support plate 2 is fixedly connected to a shaft tube 16 in the middle, the axis of the shaft tube 16 is in the same straight line as the axis of the pipe 3, and a wire tube 17 is fixedly connected to the front end of the shaft tube 16. The wire tube 17 is threaded with two clamping bolts 18. The two clamping bolts 18 are on the same diameter of the wire tube 17. When the foot line 101 passes through the wire tube 17, the two clamping bolts 18 clamp the foot line 101. A circular shell 13 is fixedly connected to the outer wall of the shaft tube 16, and a circular arc-shaped first ventilation groove 15 is opened on the inner end surface of the shell 13. The outer wall of the support plate 2 A constant pressure chamber 27 with a constant internal pressure is fixedly connected to the shell 13, and a connecting pipe 26 is fixedly connected to the end surface of the outer wall of the shell 13. The connecting pipe 26 connects the constant pressure chamber 27 with the first ventilation groove 15. A rotating disk 12 is rotatably installed in the shell 13. A joint 11 is fixedly connected to the end surface of one end of the rotating disk 12. The other end surface of the rotating disk 12 abuts against the inner end surface of the shell 13 and is provided with a second arc-shaped ventilation groove 14. The joint 11 is connected to the second ventilation groove 14. The joint 11 is connected to the air pipe 8. The outer wall of the air pipe 8 is connected to the air outlet pipe 9, and the air outlet pipe 9 is aligned with the foot line 101 on the support plate 6.

[0031] After the other end of the foot wire 101 passes through the wire tube 17 , the two clamping bolts 18 are manually rotated so that the two clamping bolts 18 clamp and fix the foot wire 101 in the wire tube 17 .

[0032] After the two ends of the foot line 101 are clamped, the test can be carried out. The working principle and test process are as follows:

[0033] Step 1: Start the stepper motor 24. The stepper motor 24 drives the ring gear 4 to rotate through the driving gear 25. The rotation of the ring gear 4 will drive the support plate 6 to rotate synchronously. The aluminum plate 7 is fixed on the support plate 6. The rotation of the support plate 6 will drive the aluminum plate 7 to rotate to change the angle of the aluminum plate 7.

[0034] Step 2: (Since the leg line 101 has a high density and a small volume, the influence of buoyancy is not considered during the laboratory simulation process) Simulate the underwater environment:

[0035] During the simulation test, the water flow rate was gradually increased starting from 0:

[0036] In the actual environment, when the water flow velocity is 0, the foot line 101 will droop naturally; corresponding to the present test device, the aluminum plate 7 is in a vertical state;

[0037] When the water flow velocity in the actual environment is greater than 0, the water flow generates a horizontal impact force on the footing 101. Under the action of the impact force and the weight of the footing 101 itself, the footing 101 will tilt in the direction of the water flow with the force points at both ends as the center of the circle, and the inclination angle of the footing 101 is positively correlated with the magnitude of the water flow velocity; corresponding to this experimental device, it is manifested as the aluminum plate 7 tilting, and the greater the water flow velocity in the actual environment, the greater the inclination angle of the aluminum plate 7 will be, and the inclination angle of the footing 101 placed on its surface will also increase.

[0038] Step 3: In the actual environment, when the water flow velocity is not 0, when the water flows through the foot line 101, the water body will also produce friction with the surface of the foot line 101. The test device simulates the friction force through the airflow emitted by the constant pressure chamber 27, simulating the continuous impact of the water flow on the foot line 101. The simulation process is as follows:

[0039] like Figure 6-Figure 8 As shown, the airflow emitted from the constant pressure chamber 27 enters the first ventilation groove 15 through the connecting pipe 26, and when the aluminum plate 7 rotates with the support plate 6 to adjust the angle, the support plate 6 drives the air pipe 8 to rotate, and the rotating disk 12 is connected to the air pipe 8 through the joint 11. During the rotation of the air pipe 8, the rotating disk 12 is driven to rotate in the housing 13;

[0040] After the rotating disk 12 rotates in the housing 13, part of the second ventilation groove 14 will overlap with the first ventilation groove 15, so that the second ventilation groove 14 is connected with the first ventilation groove 15. After the two ventilation grooves are connected, the airflow emitted from the constant pressure chamber 27 will pass through the first ventilation groove 15, the second ventilation groove 14 and the joint 11 in sequence, enter the air pipe 8, and be emitted from the air outlet pipe 9 provided outside the air pipe 8;

[0041] Since the air outlet pipe 9 is aligned with the foot line 101 on the surface of the aluminum plate, the wind force generated by the airflow emitted by the air outlet pipe 9 will act on the foot line 101, thereby simulating the impact force and friction force of the water flow on the foot line 101 in the actual environment.

[0042] The larger the inclination angle of the aluminum plate 7 is, the larger the overlap area of ​​the second ventilation groove 14 and the first ventilation groove 15 will be after the rotating disk 12 rotates in the housing 13, so that the air flow velocity emitted by the air outlet pipe 9 will be greater, and the force of the air flow on the foot line 101 will be greater. In this way, the force of water flow with different flow rates on the foot line 101 is simulated.

[0043] like Figure 4 As shown, a serpentine coil 10 is fixedly connected to the surface of the support plate 6. The coil 10 is used to accommodate water flow and change the temperature of the aluminum plate 7 according to the temperature of the water flow.

[0044] At different temperatures, the tensile properties of materials are different.

[0045] Water flows of different temperatures are charged into the coil 10 to change the temperature of the aluminum plate 7, so as to increase or decrease the temperature of the foot line 101 on the aluminum plate 7, thereby simulating the temperature of water flow in an actual environment.

[0046] like Figure 3-Figure 5 As shown, a hopper 19 for accommodating small balls 23 is fixedly connected to the top of the support plate 2, a top hinged cover plate 20 of the hopper 19, a delivery hose 21 is connected to the bottom of the hopper 19, and the bottom end of the delivery hose 21 is connected to the air outlet pipe 9 to transport the small balls 23 in the hopper 19 to the air outlet pipe 9, a collecting box 1 is fixedly connected to the bottom of the support plate 2 to collect the small balls 23, and a slide plate 22 is fixedly inclined in the collecting box 1 to transport the small balls 23 to the bottom of the hopper 19.

[0047] In an actual environment, there are impurities in the water flow, and these impurities may impact the foot line 101 under the influence of the water flow.

[0048] During the simulation test, after sampling the water flow to obtain the impurity density distribution in the water, the cover 20 is opened according to the density of the impurities in the water, and a small ball 23 is placed in the hopper 19. Under the action of gravity, the small ball 23 enters the air outlet pipe 9 along the feed hose 21. After entering the air outlet pipe 9, the small ball 23 will be accelerated by the air flow in the air outlet pipe 9. The accelerated small ball 23 impacts the foot line 101 along the surface of the aluminum plate 7, thereby simulating the impact of impurities in the water flow on the foot line 101.

[0049] After the small ball 23 completes the collision work, it will fall into the collection box 1 under the action of gravity, and slide along the slide plate 22 to the bottom of the hopper 19, so that the staff can take the small ball 23 and fill the small ball 23 into the hopper 19.

[0050] Working principle and workflow:

[0051] When testing the leg wire 101 of the detonator 103, first place the detonator 103 on the aluminum plate 7, then pass one end of the leg wire 101 through the pipe 3 and clamp it on the wire clamp 5 at the tail of the pipe 3; after the other end of the leg wire 101 passes through the wire tube 17, manually rotate the two clamping bolts 18 to clamp and fix the leg wire 101 in the wire tube 17.

[0052] After the two ends of the foot line 101 are clamped, the test can be carried out. The working principle and test process are as follows:

[0053] Step 1: Start the stepper motor 24. The stepper motor 24 drives the ring gear 4 to rotate through the driving gear 25. The rotation of the ring gear 4 will drive the support plate 6 to rotate synchronously. The aluminum plate 7 is fixed on the support plate 6. The rotation of the support plate 6 will drive the aluminum plate 7 to rotate to change the angle of the aluminum plate 7.

[0054] Step 2: (Since the leg line 101 has a high density and a small volume, the influence of buoyancy is not considered during the laboratory simulation process) Simulate the underwater environment:

[0055] During the simulation test, the water flow rate was gradually increased starting from 0:

[0056] In the actual environment, when the water flow velocity is 0, the foot line 101 will droop naturally; corresponding to the present test device, the aluminum plate 7 is in a vertical state;

[0057] When the water flow velocity in the actual environment is greater than 0, the water flow generates a horizontal impact force on the footing 101. Under the action of the impact force and the weight of the footing 101 itself, the footing 101 will tilt in the direction of the water flow with the force points at both ends as the center of the circle, and the inclination angle of the footing 101 is positively correlated with the magnitude of the water flow velocity; corresponding to the present experimental device, the aluminum plate 7 is tilted, and the greater the water flow velocity in the actual environment, the greater the inclination angle of the aluminum plate 7 will be, and the inclination angle of the footing 101 placed on its surface will also increase.

[0058] Step 3: In the actual environment, when the water flow velocity is not 0, when the water flows through the foot line 101, the water body will also produce friction with the surface of the foot line 101. The test device simulates the friction force through the airflow emitted by the constant pressure chamber 27, simulating the continuous impact of the water flow on the foot line 101. The simulation process is as follows:

[0059] like Figure 6-Figure 8 As shown, the airflow emitted from the constant pressure chamber 27 enters the first ventilation groove 15 through the connecting pipe 26, and when the aluminum plate 7 rotates with the support plate 6 to adjust the angle, the support plate 6 drives the air pipe 8 to rotate, and the rotating disk 12 is connected to the air pipe 8 through the joint 11. During the rotation of the air pipe 8, the rotating disk 12 is driven to rotate in the housing 13;

[0060] After the rotating disk 12 rotates in the housing 13, part of the second ventilation groove 14 will overlap with the first ventilation groove 15, so that the second ventilation groove 14 is connected with the first ventilation groove 15. After the two ventilation grooves are connected, the airflow emitted from the constant pressure chamber 27 will pass through the first ventilation groove 15, the second ventilation groove 14 and the joint 11 in sequence, enter the air pipe 8, and be emitted from the air outlet pipe 9 provided outside the air pipe 8;

[0061] Since the air outlet pipe 9 is aligned with the foot line 101 on the surface of the aluminum plate, the wind force generated by the airflow emitted by the air outlet pipe 9 will act on the foot line 101, thereby simulating the impact force and friction force of the water flow on the foot line 101 in the actual environment.

[0062] Since the tensile strength of materials is different at different temperatures, the present invention changes the temperature of the aluminum plate 7 by injecting water flows of different temperatures into the coil 10 to increase or decrease the temperature of the foot line 101 on the aluminum plate 7, thereby simulating the temperature of water flow in an actual environment.

[0063] In the actual environment, there are impurities in the water flow, and these impurities may impact the foot line 101 under the influence of the water flow. During the simulation test, after sampling the water flow in advance to obtain the density distribution of impurities in the water, according to the density of the impurities in the water, the cover plate 20 is opened, and a small ball 23 is placed in the hopper 19. The small ball 23 enters the outlet pipe 9 along the feeding hose 21 under the action of gravity. After entering the outlet pipe 9, the small ball 23 will be accelerated by the air flow in the outlet pipe 9. The accelerated small ball 23 impacts the foot line 101 along the surface of the aluminum plate 7, thereby simulating the impact of impurities in the water flow on the foot line 101.

[0064] Compared with the stretching equipment in the prior art, the detonator tensile test device provided by the present invention can simulate the radial impact force to which the detonator leg line 101 is subjected in an underwater environment, and can simulate the temperature of the underwater environment through the coil 10. The impact of the small ball 23 on the leg line 101 can simulate the impact of impurities in the water on the leg line 101, thereby greatly improving the accuracy of the test results.

[0065] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A detonator tensile test device, comprising two vertically arranged support plates (2), the two support plates (2) being parallel to each other, characterized in that: A pipe fitting (3) for accommodating the leg wire (101) is fixedly connected horizontally to the middle of one of the support plates (2), the pipe fitting (3) passes through the support plate (2), an L-shaped support plate (6) is rotatably mounted on the outer wall of the pipe fitting (3), a ring gear (4) is sleeved on the outside of the pipe fitting (3), the ring gear (4) is fixedly connected to the support plate (6), and an aluminum plate (7) is fixedly connected to the support plate (6) for supporting the leg wire (101); A shaft tube (16) is fixedly connected to the middle of the other support plate (2), the axis of the shaft tube (16) and the axis of the pipe (3) are in the same straight line, a circular shell (13) is fixedly connected to the outer wall of the shaft tube (16), an arc-shaped first ventilation groove (15) is provided on the inner end surface of the shell (13), a constant pressure chamber (27) with a constant internal pressure is fixedly connected to the outer wall of the support plate (2), a connecting pipe (26) is fixedly connected to the outer wall end surface of the shell (13), and the connecting pipe (26) connects the constant pressure chamber (27) and the first ventilation groove (15) 5), a rotating disk (12) is rotatably mounted in the shell (13), one end surface of the rotating disk (12) is fixedly connected to a joint (11), the other end surface of the rotating disk (12) abuts against the inner end surface of the shell (13) and is provided with a second arc-shaped ventilation groove (14), the joint (11) is connected to the second ventilation groove (14), the joint (11) is connected to an air pipe (8), the outer wall of the air pipe (8) is connected to an air outlet pipe (9), and the air outlet pipe (9) is aligned with the foot line (101) on the support plate (6).

2. The detonator tensile test device according to claim 1, characterized in that: The surface of the support plate (6) is fixedly connected to a serpentine coil (10), and the coil (10) is used to accommodate water flow passing therethrough, and the temperature of the aluminum plate (7) is changed according to the temperature of the water flow.

3. The detonator tensile test device according to claim 2, characterized in that: A stepper motor (24) is fixedly connected to the support plate (2) where the pipe (3) is located. A driving gear (25) is fixedly connected to the output end of the stepper motor (24). The driving gear (25) matches the ring gear (4).

4. The detonator tensile test device according to claim 3, characterized in that: A hopper (19) for accommodating small balls (23) is fixedly connected to the top of the support plate (2), a cover plate (20) is hingedly connected to the top of the hopper (19), a conveying hose (21) is connected to the bottom of the hopper (19), and the bottom end of the conveying hose (21) is connected to the air outlet pipe (9) so as to convey the small balls (23) in the hopper (19) to the air outlet pipe (9).

5. The detonator tensile test device according to claim 4, characterized in that: A collecting box (1) is fixedly connected to the bottom of the support plate (2) for collecting the small balls (23), and a sliding plate (22) is fixedly connected in an inclined manner in the collecting box (1) for conveying the small balls (23) to the bottom of the hopper (19).

6. The detonator tensile test device according to claim 1, characterized in that: A wire clamp (5) is fixed to the tail of the pipe (3) to clamp and fix the end of the foot line (101).

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