Plasma blasting boulder test device

Abstract

The utility model relates to the technical field of boulder blasting tests, in particular to a plasma blasting boulder test device which comprises a test operating mechanism, the test operating mechanism comprises a blasting chamber and a first storage rack arranged at the bottom of the blasting chamber, and one side of the test operating mechanism is connected with a control mechanism. The control mechanism is arranged on one side, far away from the first storage rack, of the first storage rack, the control mechanism comprises a control table for placing a control box, and a second storage rack is arranged at the bottom of the control table; wherein plasma blasting equipment is placed in the blasting chamber, and the control box is connected with the plasma blasting equipment and used for supplying power to the plasma blasting equipment. According to the utility model, a plurality of boulder blasting test data records are carried out in the blasting chamber, the damage, fracture degree and fracture direction after boulder blasting are analyzed from a large amount of data, and the problem of inaccurate parameter setting of plasma directional blasting shield tunnel boulders can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of boulder blasting test, in particular to a plasma blasting boulder test device. Background Art

[0002] The shield machine is currently the most commonly used large-scale engineering equipment for excavating soft soil tunnels. It has the significant advantages of fast construction speed, small environmental disturbance, and high tunnel quality. However, in some special strata, the shield machine cutterhead will encounter large boulders embedded in the soft soil. If they are not removed, it will seriously affect the excavation of the shield machine and even damage the cutter. Because the space in front of the shield machine cutterhead is small and the soil pressure must be maintained to prevent the face from collapsing, the method of manually loading explosives is usually used to break the boulders in current projects. However, this method is highly dangerous, has low construction efficiency, serious pollutant emissions, and strong blasting will damage the shield machine cutterhead.

[0003] Plasma is an effective means of breaking boulders. Compared with traditional explosive blasting, it is safe, efficient, and environmentally friendly. However, in practice, due to the changes in the properties of boulders and the existence of structural cracks, the parameter settings for using plasma directional blasting to break boulders in shield tunnels cannot be accurately determined. At present, there is a lack of conditions and equipment for laboratory simulation of plasma blasting of boulders in shield tunnels. Therefore, it is urgent to carry out relevant experimental research to reveal the influence of plasma parameters on different boulder blasting states.

[0004] In view of this, the inventor provides a plasma blasting boulder test device for carrying out experimental research on plasma breaking of boulders to solve the above technical problems. Utility Model Content

[0005] The purpose of the utility model is to overcome the disadvantages of the above-mentioned prior art and provide a plasma blasting boulder test device. By using plasma to blast the boulder in a blasting chamber, several blasting test data are recorded in the blasting chamber, and the degree and direction of damage and rupture of the boulder after blasting are analyzed from a large amount of data, which provides a new technology for the further development of boulder blasting.

[0006] The purpose of the utility model is to solve the problem through the following technical solutions:

[0007] The utility model provides a plasma blasting boulder test device, comprising a test operating mechanism, the test operating mechanism comprising a blasting chamber provided with sand and soil and a first storage rack arranged at the bottom of the blasting chamber, one side of the test operating mechanism is connected with a control mechanism, and the control mechanism is arranged away from the side of the first storage rack, the control mechanism comprises a console for placing a control box, and a second storage rack is arranged at the bottom of the console;

[0008] Wherein, a plasma blasting device is placed in the blasting chamber, and the control box is connected to the plasma blasting device for supplying power to the plasma blasting device.

[0009] Furthermore, a ZVS amplifier circuit is arranged in the control box, and the plasma blasting equipment comprises a discharge electrode, and the discharge electrode is connected to the ZVS amplifier circuit, and power is transmitted to the discharge electrode after the ZVS amplifier circuit is powered on.

[0010] Furthermore, the control box is also provided with a switch for controlling the opening or closing of the ZVS amplifier circuit.

[0011] Furthermore, a groove is provided on the top of the console, and the control box is placed in the groove.

[0012] Furthermore, a first protective baffle is provided on the console.

[0013] Furthermore, a ventilation hole is provided on the top of the blasting chamber, a fan is installed on the top of the ventilation hole, and the control box is connected to the fan for supplying power to the fan.

[0014] Furthermore, the top of the blasting chamber, located on one side of the ventilation hole, is arranged as an opening structure, the opening structure is farther away from the control mechanism than the ventilation hole, and a detachably connected cover plate is arranged on the opening structure.

[0015] More specifically, the cover plate and the blasting chamber are detachably connected by screws or bolts.

[0016] Furthermore, an observation window is provided on the side of the blasting chamber in the direction of the control mechanism, and the observation window is used to observe the operation process inside the blasting chamber. A ventilation window that can be opened or closed is provided on the side of the blasting chamber in the vertical direction of the control mechanism.

[0017] Furthermore, a second protective baffle is provided on the outer edge of the test operating mechanism and on a side close to the control mechanism.

[0018] It should be noted that the test device of the utility model can also be used in blasting test analysis of rocks, without limitation on the blasting object, and has a wide range of applications.

[0019] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0020] The utility model provides a plasma blasting boulder test device. By using plasma to blast boulders in a blasting chamber, compared with traditional rock breaking methods, the safety is improved and the blasting cost is reduced. The device can replace explosives and will not produce toxic polluting gases. At the same time, data of several blasting boulder tests are recorded in the blasting chamber, and the damage and fracture degree and fracture direction of the boulder after blasting are analyzed from a large amount of data. This provides a new technology for the further development of boulder blasting and can solve the problem of inaccurate parameter setting of plasma directional blasting of shield tunnel boulders. The utility model is simple to use, safe to operate, and suitable for vigorous promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings herein are incorporated into and constitute a part of this specification, and together with the description, are used to explain the principles of the present utility model.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0023] Figure 1 This is a schematic diagram of the overall structure of the plasma blasting boulder test device of the utility model;

[0024] Figure 2 This is a schematic diagram of the top structure of the plasma blasting boulder test device of the utility model;

[0025] Figure 3 This is a front view of the utility model plasma blasting boulder test device;

[0026] Figure 4 This is a ZVS amplifier circuit in the prior art.

[0027] Among them: 1 is the test operation mechanism; 2 is the control mechanism; 11 is the blasting chamber; 12 is the first storage rack; 13 is the second protective baffle; 14 is the cover plate; 21 is the control console; 22 is the second storage rack; 111 is the ventilation hole; 112 is the observation window; 113 is the air permeable window; 211 is the groove; 212 is the first protective baffle. DETAILED DESCRIPTION

[0028] Here, exemplary embodiments will be described in detail, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the utility model. Instead, they are only examples of devices consistent with some aspects of the utility model as detailed in the attached claims.

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] See also Figure 1 to Figure 3 The utility model provides a plasma blasting boulder test device, including a test operating mechanism 1, the test operating mechanism 1 includes a blasting chamber 11 with sand and soil and a first storage rack 12 arranged at the bottom of the blasting chamber 11, one side of the test operating mechanism 1 is connected to a control mechanism 2, and the control mechanism 2 is arranged away from the side of the first storage rack 12, the control mechanism 2 includes a control console 21 for placing a control box, and a second storage rack 22 is arranged at the bottom of the control console 21;

[0031] A plasma blasting device is placed in the blasting chamber 11 , and the control box is connected to the plasma blasting device to supply power to the plasma blasting device.

[0032] Specifically, the test device is made of 45# steel plate, the blasting chamber 11 is connected to the first storage rack 12 by bolts or welding, the control mechanism 2 is connected to the test operation mechanism 1 by bolts or welding, and the console 21 is connected to the second storage rack 22 by bolts or welding.

[0033] In order to facilitate the control of the ZVS amplifier circuit and thus control the operation of the plasma blasting device, further, the control box is provided with a ZVS amplifier circuit, and the plasma blasting device includes a discharge electrode, and the discharge electrode is connected to the ZVS amplifier circuit. Furthermore, the control box is also provided with a switch for controlling the opening or closing of the ZVS amplifier circuit. The ZVS amplifier circuit is a prior art and will not be described in detail here.

[0034] Specifically, a lead hole can be opened on the side of the blasting chamber 11, close to the console 21. Of course, the lead hole can also be opened at other positions close to the console 21, as long as the equipment in the blasting chamber 11 can be connected to the control box.

[0035] In order to facilitate the safe and stable placement of the control box, a groove 211 is further provided on the top of the console 21 , and the control box is placed in the groove 211 .

[0036] In order to protect the control box, a first protective baffle 212 is further provided on the console 21. Specifically, the first protective baffle 212 is made of No. 45 steel plate.

[0037] In order to quickly discharge the gas inside the blasting chamber 11 into the atmosphere after the boulder blasting is completed, a ventilation hole 111 is further opened on the top of the blasting chamber 11, and a fan is installed on the top of the ventilation hole 111. The control box is connected to the fan for supplying power to the fan.

[0038] In order to facilitate operation in the blasting chamber 11, the top of the blasting chamber 11, located on one side of the ventilation hole 111, is further configured as an open structure, which is farther away from the control mechanism 2 than the ventilation hole 111, and is provided with a detachably connected cover plate 14. Specifically, in this embodiment, the cover plate and the blasting chamber are detachably connected by bolts.

[0039] In order to be able to observe the boulder blasting process inside the blasting chamber 11 more clearly from the outside, and to quickly exhaust the internal air after the blasting is completed, further, an observation window 112 is correspondingly provided on the side of the blasting chamber 11, located in the direction of the control mechanism 2, and the observation window 112 is used to observe the operation process inside the blasting chamber 11, and a ventilation window 113 that can be opened or closed is correspondingly provided on the side of the blasting chamber 11, located in the vertical direction of the control mechanism 2. In addition, the ventilation window 113 can also be used as a channel for manual operation in the blasting chamber 11.

[0040] Specifically, the observation window 112 and the ventilation window 113 are made of explosion-proof glass.

[0041] In order to provide double protection for the control box, a second protective baffle 13 is further provided on the outer edge of the test operating mechanism 1 and on a side close to the control mechanism 2. Specifically, the second protective baffle 13 is made of 45# steel plate.

[0042] The specific application process of the plasma blasting boulder test device in practice is as follows:

[0043] Step 1: Take out the solitary rock to be blasted from the first storage rack 12 or the second storage rack 22, arrange the plasma blasting hole position in the solitary rock structure, and use an electric drill to drill the hole, requiring the blast hole to be vertically downward to ensure that the electrolyte solution subsequently poured in will not flow out by itself, and then place it in the sand in the blasting chamber 11, and expose the blasting hole position to the outside; specifically, the power cord of the electric drill is connected to the control box through the lead hole;

[0044] Step 2: Prepare a suitable electrolyte solution and pour it into the blasting hole;

[0045] Step 3: insert the discharge electrode into the strong electrolyte solution in the blasting hole, power on the control box, and operate the switch of the ZVS amplifier circuit on the control box to make the ZVS amplifier circuit supply power to the discharge electrode of the plasma blasting equipment. The electrolyte solution generates high-density plasma under the action of the electric energy emitted by the discharge electrode, and generates high temperature and shock waves at the moment of discharge, breaking the boulders on the wall of the blasting hole, and completing a plasma boulder blasting operation;

[0046] Step 4: After the blasting is completed, the fan and the ventilation window 113 are turned on to allow the air in the blasting chamber 11 to be quickly discharged into the atmosphere, thereby achieving the purpose of replacing the air inside and outside.

[0047] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention.

[0048] It should be understood that the present invention is not limited to the above-described contents, and various modifications and changes can be made without departing from its scope. The scope of the present invention is limited only by the appended claims.

Claims

1. A plasma blasting boulder test device, characterized in that: The test operating mechanism (1) comprises a blasting chamber (11) provided with sand and soil and a first storage rack (12) arranged at the bottom of the blasting chamber (11); a control mechanism (2) is connected to one side of the test operating mechanism (1), and the control mechanism (2) is arranged away from the side of the first storage rack (12); the control mechanism (2) comprises a control console (21) for placing a control box, and a second storage rack (22) is arranged at the bottom of the control console (21); Wherein, a plasma blasting device is placed in the blasting chamber (11), and the control box is connected to the plasma blasting device and is used to supply power to the plasma blasting device.

2. The plasma explosion boulder test device according to claim 1, characterized in that: A ZVS amplifier circuit is arranged in the control box, and the plasma blasting equipment comprises a discharge electrode, which is connected to the ZVS amplifier circuit.

3. The plasma explosion boulder test device according to claim 2, characterized in that: The control box is also provided with a switch for controlling the opening or closing of the ZVS amplifier circuit.

4. The plasma explosion boulder test device according to claim 1, characterized in that: The top of the console (21) is provided with a groove (211), and the control box is placed in the groove (211).

5. The plasma explosion boulder test device according to claim 1, characterized in that: The console (21) is provided with a first protective baffle (212).

6. The plasma explosion boulder test device according to claim 1, characterized in that: A ventilation hole (111) is provided on the top of the blasting chamber (11), a fan is installed on the top of the ventilation hole (111), and the control box is connected to the fan for supplying power to the fan.

7. The plasma explosion boulder test device according to claim 6, characterized in that: The top of the blasting chamber (11) and one side of the ventilation hole (111) is provided with an opening structure, the opening structure is farther away from the control mechanism (2) than the ventilation hole (111), and a detachably connected cover plate (14) is provided on the opening structure.

8. The plasma explosion boulder test device according to claim 1, characterized in that: An observation window (112) is provided on the side of the blasting chamber (11) in the direction of the control mechanism (2), and the observation window (112) is used to observe the operation process inside the blasting chamber (11). A ventilation window (113) that can be opened or closed is provided on the side of the blasting chamber (11) in the vertical direction of the control mechanism (2).

9. The plasma explosion boulder test device according to claim 1, characterized in that: A second protective baffle (13) is provided on the outer edge of the test operating mechanism (1) and on a side close to the control mechanism (2).

Images