CN102589832A - Drop test system - Google Patents

Abstract

The drop test system disclosed by the present invention belongs to the technical field of drop test. The drop test system is a test system for dropping test pieces by micro-explosive cutting. The cutter is placed in the device for hoisting the drop test piece, the drop pit is set on the vertical ground in the center of the drop support, and steel plates, cement, or rubber can be placed on the dropped ground. The advantages of the present invention are: the drop test system For remote control of the drop, it is suitable for the requirements of the field test field and can ensure the safety of the operator. It is suitable for the drop test of the packaged product with a hoisting mass of no more than 3T, a hoisting connection size of no more than 2m, no power supply in the drop field and the possibility of explosion of the specimen. , this kind of drop test system is simple in structure, easy to carry and install, reusable, with little loss and low cost, it is worth adopting and popularizing.

Description

Drop Test System

1. Technical field

The drop test system disclosed by the present invention belongs to the technical field of drop test, and in particular relates to a drop test system that makes a test piece fall freely by detonating. There is no power supply, and the product drop test where the test piece may explode.

2. Background technology

In the field of national defense and industrial production, some important products need to do drop tests to verify whether the performance of the product will change after the drop, or whether the working status of the internal components of the product will change, or the product’s drop impact assessment, etc.

The general drop test frame is mainly composed of two straight rods of equal length, a guide column and a slider moving along the guide column. The column is erected on the base, and the test piece can be fixed on the slider. Lift the block to a certain height, and then release the slide block to make the slide block do a similar free-fall movement until it hits the cushion block on the base, so as to evaluate the drop impact resistance of the product.

This kind of drop test equipment, due to the limitation of the height of the column and the space on the slider, the drop height and the volume of the loaded test piece are within a certain range, and are generally aimed at parts of small-quality products. And it is only suitable for indoor drop test. For some large mass, such as equipment with a mass greater than 500kg; large diameter, such as installation size greater than 0.5m; or some relatively dangerous products, such as projectiles containing explosives, compressed gas cylinders containing compressed air, etc., these products are in When doing the drop test, it is limited to the quality, volume, danger, etc., and the general drop test equipment cannot meet the requirements. Therefore, it is necessary to develop a new drop test equipment to meet the requirements of remote control drop and suitable for field test sites. For this reason, the present invention has developed a drop test system suitable for packaged products whose mass is not more than 3T, whose hoisting size is not more than 2m, where there is no power supply at the drop site, and where the test piece may explode.

3. Contents of the invention

The purpose of the present invention is: provide this drop test system to the society, this test system is applicable to the product drop test of large mass (as 3T), large size (2m), there is no power supply in the drop site, and the test piece has the possibility of explosion.

The technical scheme of the present invention is as follows: the drop test system has the technical characteristics that: the drop test system is a test system that makes the test piece drop by micro-explosive cutting, and the drop test system consists of a drop bracket and a drop test system hoisted on the bracket. It consists of a test piece, a cutting mechanism and a drop pit. The described test system that makes the test piece drop by micro-explosive cutting has no power supply for the drop site, and can only use batteries as the explosive cutting power supply, and the product drop test that the test piece has the possibility of explosion is very suitable.

According to the above-mentioned drop test system, the technical features are: the specific structure of the drop test system is: a drop bracket, a device for hoisting the drop test piece is arranged on the beam of the bracket, and the directional cutter is placed on the device for lifting the drop test piece Among them, the drop pit is arranged on the vertical ground in the center of the drop bracket, and the steel plate, or cement, or rubber, etc., are placed on the ground to be hit. The device for hoisting the drop test piece provided on the support beam is hoisted to the drop support beam by auxiliary lifting equipment, and then the auxiliary lifting equipment is evacuated from the drop test site. The setting of the drop pit, the placement of steel plates, cement, or rubber, etc. on the ground should be selected according to the different products or test pieces of the drop test.

According to the above-mentioned drop test system, the technical features also include: the drop support of the drop test system is composed of a triangular support A, a triangular support B, and an I-beam beam. The steel beams are fixedly connected. The structures such as the drop bracket and the beam are very suitable for long-term use, use of explosive test pieces, and convenient replacement of various parts of the drop bracket.

According to the above-mentioned drop test system, the technical features also include: the device for hoisting the drop test piece set on the support beam is composed of a sling and an adjustment device: a. The sling is a nylon flat sling, and the nylon flat The sling is made of n layers of nylon belts, where n is an even number between 2 and 8. The two ends of the nylon flat sling are tied or sleeved or connected to the drop test piece. The midpoint of the length of the nylon flat sling is separated into two Layers, each layer is composed of n/2 layers of flat nylon slings, separated into the middle and inserted into the directional cutter, the length of the directional cutter is placed along the width direction of the nylon flat sling, and the center hole of the directional cutter is plugged with a blasting tube. b. The adjustment device is composed of an adjustment shaft, a bearing, a bearing seat, and a bottom plate. The two adjustment shafts are parallel to the I-beam beam and installed in the bearing through the shaft head. The bearing is installed in the bearing seat, and the four bearing seats are welded. On the bottom plate, the bottom plate is welded at the center of the length of the I-beam beam. The adjustment device can adjust the length of both sides of the flat sling by rotating the adjustment shaft, so that the test piece can fall freely along the direction of gravity. The selection of the number of layers, width selection, length selection, directional cutter size selection, cutting burst tube size and explosive charge selection of the nylon flat sling should all be based on the quality of the drop test product or test piece, the volume size, Depends on the drop height.

According to the above-mentioned drop test system, the technical features also include: the cross-section of the directional cutter is an elliptical cylinder, and a hole is opened in the center of the ellipse, and a cutting burst tube is plugged in the hole. The diameter of the hole and the depth of the hole should be matched with the directional cutter, and should be determined according to the quality and size of the drop test product or test piece.

According to the above-mentioned drop test system, the technical features also include: the cutting mechanism is composed of a detonator, a detonator, a wire, a detonating switch or a detonator. The mouth of the detonator is sealed, and the detonator is connected with the detonation switch or the detonator through a wire. The number of the cut-off tube and its built-in explosive column must be selected according to the quality and volume of the drop test product or test piece.

According to the above-mentioned drop test system, the technical features are as follows: In the drop test system: a. The bearing and the adjustment shaft are clearance fit, the bearing and the bearing seat are clearance fit, and the retaining rings for the holes are respectively installed in each In the retaining ring hole of the bearing housing. b. The hole diameter of the directional cutter is 4-5mm smaller than the diameter of the short side of the ellipse. c. A compressed explosive column with a set charge is placed inside the cut-off tube.

The drop test system of the present invention has the following advantages: 1. The present invention is suitable for the drop test of a packaged product whose quality is not more than 3T, the connection size is not more than 2m, and the drop field does not have a power supply and a possible explosion of the test piece. 2. The drop test equipment developed by the present invention is for remote control of the drop, which is suitable for the requirements of the field test field and can ensure the safety of the operators. 3. The drop test system is simple in structure, easy to carry and install, reusable, with little loss and low cost. This drop test system is worth adopting and popularizing.

4. Description of drawings

There are 5 pieces of accompanying drawings in the description of the present invention:

Figure 1 is a schematic structural diagram of the drop test system;

Figure 2 is a structural diagram of the adjustment device of the drop test system;

Fig. 3 is a structural schematic diagram of the adjustment device, the flat sling, and the directional cutter of the drop test system;

Fig. 4 is a schematic diagram of the three-dimensional structure of an elliptical cylinder directional cutter;

Fig. 5 is a structural schematic diagram of a cutting tube, a detonator, a wire, a detonating switch or a detonator of the cutting mechanism.

A unified reference number is used in each figure, that is, the same object uses the same reference number in each figure. In each figure: 1., 7. Triangular bracket A, triangular bracket B; 2. I-beam beam; 3. Drop test piece; 4. Device for lifting the drop test piece; 5. Flat sling; 6. Detonating wire; 8. Floor of drop pit; 9. Setting of drop pit; 10. Bottom plate; 11. Bearing seat; 12. Retaining ring for hole; 13. Bearing; 14. Adjustment shaft; Cylinder; 17. Cut blasting tube; 19. Center hole of oval cylinder; 20. Explosive column; 21. Detonator; 22. Detonation switch or detonator.

5. Specific implementation

The non-limiting examples of the drop test system of the present invention are as follows:

Embodiment 1. Drop test system

The drop test system in this example is a test system that relies on micro-explosive cutting to make the specimen drop. This kind of test system that relies on micro-explosive cutting to cause the specimen to drop has no power supply for the drop site, and can only use batteries as the power source for explosive cutting. The drop test is suitable for products with explosive potential. The drop test system consists of a drop bracket, a drop test piece hoisted on the bracket, a cutting mechanism and a drop pit, and its specific structure is jointly shown in Figures 1 to 5. The specific structure of the drop test system is: a drop bracket, a device for hoisting the drop test piece is arranged on the beam of the bracket, the directional cutter is placed in the device for hoisting the drop test piece, and the drop pit is set on the vertical ground in the center of the drop bracket. When falling to the ground, steel plates, cement, or rubber can be placed on the hit body. The structure of this drop test system is schematically shown in Figure 1, in Figure 1: 1, 7 are triangular support A, triangular support B, 2 is I-beam beam, described 1 triangular support A, 7 triangular support B pass through respectively The bolts are fixedly connected to the I-beam beam 2. The drop support of the drop test system is composed of 1 triangular bracket A, 7 triangular bracket B, and the I-beam beam 2. These drop brackets 1 and 7, beam 2 and other structures are very suitable for long-term Use, use of explosive test pieces, easy replacement of various parts of the drop bracket, etc. 3 is the drop test piece, 4 is the device for hoisting the drop test piece, 5 is the flat sling, 6 is the detonating wire, 8 is the ground of the drop pit, and 9 is the setting of the drop pit. Described drop pit setting 9, drop ground 8 can be placed steel plate, or cement or rubber etc. to be bumped, will make appropriate selection according to the difference of the product of drop test or test piece 3. The device 4 for hoisting the drop test piece provided on the support beam 2 is hoisted to the drop support beam 2 by the auxiliary lifting equipment, and then the auxiliary lifting equipment is evacuated from the drop test site. The device for hoisting and dropping the test piece provided on the support beam 2 is composed of a sling and an adjustment device. Fig. 2 shows the structural diagram of the adjustment device of the drop test system. 14 is parallel to the I-beam beam 2 and installed into the bearing 13 through the shaft head, the bearing 13 is installed in the bearing seat 11, and the four bearing seats 11 are welded on the bottom plate 10, and the bottom plate 10 is welded on the length center of the I-beam beam 2 , the gap fit between the bearing 13 and the adjustment shaft 14, the gap fit between the bearing 13 and the bearing seat 11, the retaining ring 12 for the hole is respectively installed in the retaining ring hole groove of each bearing seat 11, and the direction of the big mouth of the bearing seat 11 faces away from Cut the explosion center direction of the explosion tube, in order to prevent the explosion residue from falling into the bearing 13 gap. The sling 5 is a flat nylon sling, and the flat nylon sling 5 is usually sewn from n layers of nylon belts, where n is an even number between 2 and 8. Fig. 3 shows the structural diagram of the adjustment device, flat sling, and directional cutter of the drop test system. In Fig. 3: 5 is a nylon flat sling. In this example, n layers are selected as 8 layers, and 15 and 18 are the sections of two adjustment shafts , 16 is an elliptical cylinder directional cutter, and 17 is a cut blasting tube. The two ends of the nylon flat sling 5 of this example are tied on the drop test piece, and the midpoint of the length of the nylon flat sling is separated into upper and lower layers. Cutter 16, directional cutter 16 section is ellipse cylinder, has a hole 19 in its ellipse center, is plugged with cutting explosion pipe 17 in the hole 19. Fig. 4 shows elliptic cylinder directional cutter 16 three-dimensional structure schematic diagrams, and 19 is the central hole of elliptic cylinder, and the diameter of hole 19 of directional cutter 16 is smaller than the short side diameter of ellipse 4-5mm, and the diameter of hole 19, The depth will be matched with the directional cutter 16, and more will be determined according to the quality and volume size of the drop test product or test piece. The length of the directional cutter 16 is placed along the width direction of the nylon flat sling 5, and the adjustment device can adjust the length of both sides of the flat sling 5 by rotating the adjustment shaft 14, so that the test piece can freely fall along the direction of gravity. The cutting mechanism of this example is made up of cutting blasting tube 17, explosive charge 20, detonator 21, detonating wire 6, detonation switch or detonator 22 etc. Switch or detonator 22 structural schematic diagrams, cutting detonator 17 is a thin-walled circular tube with an end opening, and cutting detonator 17 inside places the explosive column 20 of pressing molding, setting charge, and seals the mouth of cutting detonator 17 with detonator 21, detonator 21 Link to each other with detonation switch or detonator 22 by wire 6. The selection of the number of layers and the width of the nylon flat sling 5, the selection of the size of the directional cutter 16, the selection of the size of the cutting tube 17 and the number of built-in explosives 20 should all be determined according to the quality and size of the drop test product or test piece and select.

Embodiment 2. Drop test system

The specific structure of the drop test system of this example can be shown in conjunction with Figures 1 to 5. The difference between the drop test system of this example and the drop test system of Embodiment 1 is that the number of layers of the nylon flat sling in this example is 5 layers, and n is 2 layers. , The rest of the drop test system of this example is not described, it is the same as that described in Embodiment 1, and will not be repeated.

Embodiment 3. Drop test system

The specific structure of the drop test system of this example can be jointly shown in Figures 1 to 5, etc. The difference between the drop test system of this example and the drop test system of Embodiment 1 and Embodiment 2 is: the number of nylon flat slings in this example has 5 layers Choose n to be 4 layers or 6 layers. The rest of the drop test system in this example is the same as that described in Embodiment 1 and Embodiment 2, and will not be repeated.

Claims (7)

1. fall-down test system is characterised in that: this fall-down test system is a pilot system of leaning on miniature blast cutting that test specimen is fallen, and this fall-down test system is by falling support, being lifted on falling test specimen, cutting mechanism and form with falling to cheat on the support.

2. fall-down test according to claim 1 system; Be characterised in that: the concrete structure of this fall-down test system is: one is fallen support; Rack beam is provided with the device that test specimen is fallen in lifting; Directed cutter is placed on lifting and falls in the device of test specimen, falls to cheat to be arranged on and falls vertically place, ground of support central authorities, falls ground and places steel plate or cement or rubber by collision body.

3. fall-down test according to claim 2 system; Be characterised in that: the support that falls of this fall-down test system is made up of triangular supports A, triangular supports B, joist steel crossbeam, and said triangular supports A, triangular supports B are fixedly connected with the joist steel crossbeam through bolt respectively.

4. fall-down test according to claim 2 system, be characterised in that: the device of test specimen is fallen in the lifting that is provided with on the described rack beam, is made up of suspender belt and adjusting gear:

A. described suspender belt is the flat suspender belt of nylon, and the flat suspender belt of this nylon is that n layer nylon tape made and formed, wherein; N is 2～8 even numbers; The flat suspender belt of nylon two ends are connected to be fallen on the test specimen, and the length midpoint of the flat suspender belt of nylon is separately up and down two-layer, and every layer is made up of the flat nylon sling of n/2 layer; Fill in directed cutter separately, be plugged with in the center hole of directed cutter and cut booster.

B. described adjusting gear is made up of adjustment axle, bearing, bearing seat, base plate; Two adjustment axle pass through spindle noses parallel with the joist steel crossbeam are installed in the bearing; Bearing Installation is in bearing seat, and four bearing seats are welded on the base plate, and base plate is welded on joist steel crossbeam length center.

5. fall-down test according to claim 4 system, be characterised in that: described directed cutter cross section is an elliptic cylindrical, has a hole at its oval center, is plugged with in the hole and cuts booster.

6. fall-down test according to claim 4 system; Be characterised in that: described cutting mechanism is formed by cutting booster, detonator, lead, a voltage flame proof switch or initiator; Cutting booster is an end opening thin-wall circular tube; Inner place explosive column and seal with detonator cut the booster oral area, detonator links to each other with a voltage flame proof switch or initiator through lead.

7. according to claim 5 or 6 described fall-down test systems, be characterised in that: in this fall-down test system:

A. described bearing is a clearance fit with the adjustment between centers, and bearing and bearing seat are clearance fit, and the hole is respectively charged in the back-up ring hole slot of each bearing seat with back-up ring;

B. described directed cutter holes hole dia is than the little 4-5mm of oval-shaped minor face diameter;

C. the described inner explosive column of placing compression moulding, setting dose of booster of cutting.

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