A bursting disc energy focusing cutting device

Abstract

The present application relates to the technical field of blasting, in particular to a bursting disc energy-gathering cutting device, which comprises a cutting head assembly, an initiating device connected with the cutting head assembly through a transmission assembly, wherein the cutting head assembly comprises a cutting unit, a protective shell and double-sided adhesive tape, the cutting unit is installed in a chute at the bottom of the protective shell, one side of the double-sided adhesive tape is adhered to the bottom of the protective shell, and the other side is detachably installed on the bursting disc, the bursting disc energy-gathering cutting device has a novel structure and can quickly reduce the pressure in the device, thereby avoiding equipment damage, property loss, personnel injury and other accidents.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of blasting technology, in particular to a bursting disc energy-gathering cutting device. BACKGROUND

[0002] The bursting disc is a non-reseating overpressure relief device, which is divided into reseating and non-reseating according to the reset condition after pressure relief. The safety valve is a reseating pressure relief device, and the bursting disc device and the fusible plug are non-reseating pressure relief devices. Generally, it is composed of a bursting disc and a holder. Simply put, the bursting disc is a one-time pressure relief device, which is widely used in chemical, petroleum, light industry, fire protection, aviation and other industrial departments. Its working principle is that the bursting disc breaks or falls off rapidly due to the limit of the pressure difference between the two sides under the set temperature environment, thereby forming a discharge port and discharging the medium. According to the structure, the bursting disc is generally divided into positive arch type, reverse arch type and flat plate type, and according to the material, it is divided into metal, non-metal and metal composite non-metal.

[0003] The bursting disc is characterized by reliable sealing, no leakage, suitable for various working media, unlimited discharge capacity, and quick explosion reaction. It is an ideal safety device for widely used super-high pressure vessels. The bursting disc mainly relies on the strength limit of the diaphragm to control the bursting pressure. For many years, many people engaged in the research of bursting disc have sought a calculation method to accurately calculate the bursting pressure of the bursting disc. However, due to many factors affecting the bursting pressure of the bursting disc, even if the theoretical calculation formula is very accurate, it is difficult to make the design value and the actual value completely consistent. For example, the tolerance of the thickness and diameter of the diaphragm, the change of the metallographic structure and the difference of the chemical composition of the diaphragm material, and the surface quality of the diaphragm and the clamping method will all cause the actual bursting pressure value of each diaphragm to be unstable, and there will be a certain deviation between the actual bursting pressure and the design bursting pressure.

[0004] The existing bursting disc often appears in two conditions during use. One is that the actual bursting pressure of the bursting disc is smaller than the designed bursting pressure, that is, the bursting disc explodes prematurely when the pressure value of the pressure vessel has not reached the set value. The other is that the actual pressure value of the bursting disc is greater than the designed bursting pressure, that is, the bursting disc does not explode when the pressure vessel has reached the upper limit of the pressure. The above two situations will cause the pressure vessel to rupture due to overpressure, resulting in significant property loss and even personnel injury accidents. Therefore, in view of the above situation, it is urgent to develop a bursting disc energy-gathering cutting device to overcome the shortcomings in current practical application. SUMMARY

[0005] The present application aims to provide a bursting disc energy-gathering cutting device to solve the problems raised in the background.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0007] A bursting disc energy-gathering cutting device, comprising:

[0008] a cutting head assembly;

[0009] an initiating device connected with the cutting head assembly through a transmission assembly;

[0010] The cutting head assembly comprises a cutting unit, a protective shell and double-sided adhesive tape, the cutting unit is installed in a sliding groove at the bottom of the protective shell, one side of the double-sided adhesive tape is attached to the bottom of the protective shell, and the other side is detachably attached to the bursting disc.

[0011] Compared with the prior art, the bursting disc energy-gathering cutting device has the following advantages:

[0012] During the overall assembly of the energy-gathering cutting device, the back of the cutting unit is first coated with adhesive, and is then installed in the sliding groove of the protective shell; all the cutting units are installed in the sliding groove of the protective shell in the same way, and then the output end of the transmission assembly is installed from the central hole at the top of the protective shell until it is attached to the cutting unit; subsequently, the double-sided adhesive tape is attached to the bottom of the protective shell, so that the energy-gathering cutting device is perfectly attached to the surface of the bursting disc during use; finally, the input end of the transmission assembly is connected with the initiating device.

[0013] During the use of the energy-gathering cutting device, the cutting head assembly is pre-installed on the non-pressure surface of the bursting disc, and the wall thickness of the bursting disc is preferably 3 mm; when the actual pressure in the pressure equipment exceeds the burst pressure of the bursting disc, the bursting disc has not yet worked, or when the pressure needs to be released in advance before the pressure reaches the burst pressure of the bursting disc;

[0014] In the two cases, the initiating device rapidly starts the cutting unit through the transmission assembly, one end of the transmission assembly is installed in the central hole at the top of the protective shell of the cutting head assembly and is connected with the cutting unit, and the other end is connected with the initiating device; when the cutting unit works, 3-10 cracks can be cut on the bursting disc in an instant, so that the high-pressure substance (gas or liquid) in the pressure equipment is rapidly released from the cutting seam, the effect of rapidly reducing the pressure in the pressure device is achieved, and accidents such as equipment damage, property loss and even personnel injury are avoided, which is worth promoting. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the bursting disc energy-gathering cutting device.

[0016] Figure 2 It is a sectional structural schematic view of the cutting head assembly.

[0017] Figure 3The structure diagram of the booster assembly part in the present application.

[0018] Figure 4 The structure diagram of the detonator part in the present application.

[0019] In the figure: 1 - cutting head assembly, 11 - cutting unit, 12 - protective shell, 13 - double-sided tape, 111 - metal shell, 112 - high-energy explosive, 2 - booster assembly, 21 - output end booster tube, 22 - detonating cord, 23 - input end booster tube, 3 - detonator, 31 - detonating element body, 311 - body scale line, 32 - rotating disc, 321 - rotating disc scale line, 33 - rotating shaft, 34 - locking pin, 35 - detonator, 351 - short-circuit protection cap. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0021] The specific implementation of the present application will be described in detail below in combination with specific embodiments.

[0022] Please refer to Figures 1-4 The blast disc energy-gathering cutting device provided by the embodiments of the present application comprises:

[0023] The cutting head assembly 1;

[0024] The detonator 3 is connected with the cutting head assembly 1 through the booster assembly 2.

[0025] The cutting head assembly 1 comprises the cutting unit 11, the protective shell 12 and the double-sided tape 13. The cutting unit 11 is installed in the sliding groove at the bottom of the protective shell 12. One side of the double-sided tape 13 is adhered to the bottom of the protective shell 12, and the other side is detachably installed on the blast disc.

[0026] During the overall assembly of the energy-gathering cutting device, the back of the cutting unit 11 is first smeared with adhesive and installed into the sliding groove at the bottom of the protective shell 12. All the cutting units 11 are installed into the sliding grooves of the protective shell 12 in the same way. Then, the output end of the booster assembly 2 is installed from the center hole at the top of the protective shell 12 until it is in close contact with the cutting unit 11. Subsequently, the double-sided tape 13 is attached to the bottom of the protective shell 12, so as to ensure that the energy-gathering cutting device is perfectly attached to the surface of the blast disc during use. Finally, the input end of the booster assembly 2 is connected with the detonator 3.

[0027] In the use of the energy focusing cutting device, the cutting head assembly 1 is installed in advance on the non-pressure surface of the bursting disc, wherein the wall thickness of the bursting disc is preferably 3 mm, the bursting disc has not worked when the actual pressure in the pressure equipment exceeds the burst pressure of the bursting disc, or the pressure needs to be released in advance when the pressure does not reach the burst pressure of the bursting disc;

[0028] In the two cases, the detonator 3 starts the cutting unit 11 through the detonating assembly 2, wherein one end of the detonating assembly 2 is installed in the central hole at the top of the protective shell of the cutting head assembly 1 and connected with the cutting unit, and the other end is connected with the detonator 3, and when the cutting unit 11 works, 3-10 cracks can be cut on the bursting disc instantaneously, so that the high-pressure substance (gas or liquid) in the pressure equipment is quickly released from the cutting seam, the effect of quickly reducing the pressure in the pressure equipment is achieved, and accidents such as equipment damage, property loss, and even personnel injury are avoided, which is worth promoting.

[0029] In an embodiment of the present application, please refer to Figure 1 and Figure 2 , the cutting unit 11 comprises a metal shell 111 and high-energy explosives 112, the metal shell 111 is internally provided with high-energy explosives 112, and the cross section of the metal shell 111 is composed of a V-shaped structure at the bottom and a circular arc structure at the top, and the inner hollow part of the metal shell 111 is filled with high-energy explosives 112.

[0030] The material of the metal shell 111 is flexible lead or red copper, which can be bent to change the shape.

[0031] The protective shell 12 is integrally formed by a non-metal material, and the protective shell 12 is composed of a plurality of T-shaped sliding grooves with open bottoms, the T-shaped sliding grooves converge at the center of the protective shell 12, and a cylindrical central hole is arranged at the center.

[0032] The number of T-shaped sliding grooves is 3-10.

[0033] In an embodiment of the present application, please refer to Figure 1 , Figure 3 and Figure 4 , the detonating assembly 2 comprises an output detonating tube 21, an explosive cord 22 and an input detonating tube 23, the two ends of the explosive cord 22 are respectively provided with the output detonating tube 21 and the input detonating tube 23, and the output detonating tube 21 and the input detonating tube 23 are respectively connected with the cutting head assembly 1 and the detonator 3.

[0034] The charge shell of the explosive cord 22 is made of silver, and the outer layer is covered with fiber knitted fabric.

[0035] The initiating device 3 comprises an initiating element body 31, a rotating disc 32, a rotating shaft 33, a locking pin 34 and an initiator 35, the locking pin 34 is arranged in the positioning hole on the rotating disc 32, and the rotating disc 32 is rotationally connected with the initiating element body 31 through the rotating shaft 33, the initiating element body 31 is connected with the transmission and explosion assembly 2, and the initiator 35 is threadedly connected with the rotating disc 32.

[0036] The initiator 35 is provided with a short-circuit protection cap 351.

[0037] The initiating element body 31 and the rotating disc 32 are each provided with a body scale line 311 and a rotating disc scale line 321 on the cylindrical surface, when the rotating disc scale line 321 is aligned with the body scale line 311, the initiating device 3 is in an active state.

[0038] Before the cutting head assembly 1 is installed, according to the thickness and outer diameter of the bursting disc and the number of required cutting seams, the appropriate model of the shaped charge cutting device is installed on the bursting disc, when the pressure in the pressure device needs to be released, the initiating network is connected, the field is cleared and warned, and initiation is performed, due to the effect of the shock wave generated by the charge in the cutting unit, the V-shaped structure of the cutting unit forms a linear metal jet knife acting on the surface of the bursting disc at a high speed, combined with the effect of the shock wave and the explosion gas, thereby forming 3-10 cutting seams on the bursting disc, and the high-pressure material in the pressure device is instantaneously discharged from the cutting seam, wherein the metal shell 111 is made of flexible lead or red copper, and can be bent to change the shape according to the operation requirement.

[0039] The protection shell 12 is arranged, so that the output end of the transmission and explosion assembly can be connected, the bottom shape of the protection shell 12 can be adjusted according to the shape of the bursting disc, and the protection shell is suitable for positive arch type, reverse arch type and flat plate type bursting discs, and will not produce large fragments during initiation, so as to not cause collateral damage;

[0040] The detonating cord is silver detonating cord, that is, the detonating cord charge shell is made of silver, and the outer layer is covered with fiber knitted fabric, so that no fragments are generated during initiation, and the collateral damage is greatly reduced;

[0041] During assembly of the initiating device 3, the locking pin 34 is first arranged in the positioning hole of the rotating disc 32, then the rotating disc 32 is connected with the initiating element body 31 through the rotating shaft 33, and the initiator 35 is connected with the rotating disc 32 through threads during use; meanwhile, the initiator 35 and the transmission and explosion assembly 2 are designed to be 180° staggered and explosion-proof, the initiator 35 and the transmission and explosion assembly 2 are staggered and explosion-proof during storage and transportation, the locking pin 34 is pulled out during use, the rotating disc 32 is rotated, and the initiator 35 is aligned with the input end of the transmission and explosion assembly 2.

[0042] The detonator 35 is also designed with a short circuit protection cap 351, which ensures that the detonator is always in a short circuit state during storage and transportation, improving safety;

[0043] The detonator 35 is also designed with a short circuit protection cap 351, which ensures that the detonator is always in a short circuit state during storage and transportation, improving safety;

[0044] In the process of using the rupture disc, the back adhesive of the double-sided adhesive tape 13 under the cutting unit 11 of the shaped cutting device is torn off, then the cutting unit 11 of the shaped cutting device is installed at the center of the rupture disc of the pressure vessel, then the output end of the booster assembly 2 is connected in the center hole of the protective shell 12, finally the input end of the booster assembly 2 is connected with the detonator 3, then the short circuit head of the detonator is pulled out by pulling the short circuit protection cap, the detonation circuit is connected with the line of the detonator 35, finally the locking pin 34 is pulled out, the disc 32 is rotated, the input end of the detonator 35 is aligned with the input end of the booster assembly 2, that is, the detonating element body 31 is aligned with the two scale lines on the cylindrical surface of the disc 32 at this time, then the personnel are evacuated, and appropriate protection is performed if necessary, the field is cleared and guarded, and detonation is performed.

[0045] Due to the action of the shock wave generated by the main charge, the linear liner in the shaped cutting unit 11 forms a high-temperature, high-pressure and high-density metal jet to act on the surface of the rupture disc at a very high speed, and the shock wave and explosion gas also act on the surface of the rupture disc, so that a cutting crack is formed on the surface of the rupture disc along the arrangement position of the shaped cutting unit, at this time, the substances in the pressure vessel are discharged along the cut crack.

[0046] It should be noted that, in the present application, unless otherwise specified and limited, the terms "sliding", "rotating", "fixing", "provided with" and the like should be understood in a broad sense, for example, can be welded connection, or bolted connection, or integrated; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In addition, it should be understood that, although the present specification is described in terms of embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

Claims

1. A rupture disc shaped charge cutting device, characterized in that, The rupture disc shaped charge cutting device includes: Cutting head assembly; An initiation device, wherein the initiation device is connected to the cutting head assembly via a detonation transmission component; The cutting head assembly includes a cutting unit, a protective housing, and double-sided adhesive. The cutting unit is installed in a groove at the bottom of the protective housing. One side of the double-sided adhesive is attached to the bottom of the protective housing, and the other side is detachably installed on the rupture disc. The cutting unit includes a metal shell and high-energy explosives. The metal shell contains high-energy explosives, and the cross-section of the metal shell is composed of a V-shaped structure at the bottom and a circular arc structure at the top. The hollow part inside the metal shell is filled with high-energy explosives. The metal casing is made of flexible lead or copper, which can be bent and changed shape. The protective shell is integrally formed from non-metallic material and consists of several T-shaped grooves with bottom openings. The T-shaped grooves converge at the center of the protective shell, where a cylindrical central hole is provided. The number of T-shaped grooves is 3-10.

2. The blasting disc shaped charge cutting device according to claim 1, characterized in that, The detonation transmission assembly includes an output detonation tube, a detonating cord, and an input detonation tube. The output detonation tube and the input detonation tube are respectively installed at both ends of the detonating cord. The output detonation tube and the input detonation tube are respectively connected to the cutting head assembly and the detonation device.

3. The blasting disc shaped charge cutting device according to claim 2, characterized in that, The detonating cord's explosive casing is made of silver, with an outer layer covered by a fibrous knitted fabric.

4. The shaped charge cutting device according to any one of claims 1-3, characterized in that, The detonation device includes a detonating element body, a turntable, a rotating shaft, a locking pin, and a detonator. The locking pin is installed in the positioning hole on the turntable, and the turntable is rotatably connected to the detonating element body through the rotating shaft. The detonating element body is connected to the detonation transmission assembly, and the detonator is threadedly connected to the turntable.

5. The blasting disc shaped charge cutting device according to claim 4, characterized in that, The detonator is equipped with a short-circuit protection cap.

6. The blasting disc shaped charge cutting device according to claim 5, characterized in that, The detonating element body and the rotary table each have a scale line on their cylindrical surfaces. When the rotary table scale line is aligned with the body scale line, the detonation device is in operation.

Images