阅读说明：本技术 一种低压测时箱准确测时机构、低压测时箱及测时方法 (Low-voltage time measurement box accurate time measurement mechanism, low-voltage time measurement box and time measurement method ) 是由 周文斌 刘晋湘 薛珂宇 于 2019-12-10 设计创作，主要内容包括：本发明提供一种低压测时箱准确测时机构,包括：箱体1、箱门2、打击滑块9、打击杆10、击锤11、触碰块12、限位开关13、熔断丝14、测时电源线15、垫座16,所述打击滑块9可上下滑动,所述触碰块12与打击滑块9固定连接,所述打击滑块9下滑撞击打击杆10时触碰块12触发限位开关13启动测时装置,所述打击杆10的下端设置击锤11,引信放置在所述垫座16上密封在箱体1内,在打击杆10被打击滑块9撞击时击锤11击打引信起爆,当引信起爆时垫座16上的熔断丝14熔断,通过测时电源线15连接的测时电源中断,测时装置测得引信延期作用时间,利用电路开合的原理测引信延期作用时间非常准确。(The invention provides an accurate time measuring mechanism of a low-voltage time measuring box, which comprises: the device comprises a box body 1, a box door 2, a striking slider 9, a striking rod 10, a striking hammer 11, a touch block 12, a limit switch 13, a fuse wire 14, a time measurement power wire 15 and a cushion base 16, wherein the striking slider 9 can slide up and down, the touch block 12 is fixedly connected with the striking slider 9, the touch block 12 triggers the limit switch 13 to start the time measurement device when the striking slider 9 slides down to strike the striking rod 10, the striking hammer 11 is arranged at the lower end of the striking rod 10, a fuse is placed on the cushion base 16 and sealed in the box body 1, the fuse 11 strikes the fuse to detonate when the striking rod 10 is struck by the striking slider 9, the fuse wire 14 on the cushion base 16 is fused when the fuse is detonated, the time measurement device measures the time delay action time of the fuse through the time measurement power wire 15, and the time delay action time of the fuse is measured by utilizing the principle of circuit opening and closing.)

1. The utility model provides a low pressure time measurement case accuracy time measurement mechanism which characterized in that includes: the box body (1), a box door (2), a striking slider (9), a striking rod (10), a striking hammer (11), a touch block (12), a limit switch (13), a fuse (14), a time measurement power line (15) and a cushion seat (16), wherein the box body (1) is opened and closed through the box door (2), a fuse is placed on the cushion seat (16) and sealed in the box body (1), the striking slider (9) can slide, the touch block (12) is fixedly connected with the striking slider (9) and slides along with the striking slider (9), when the striking slider (9) slides to strike the striking rod (10), the touch block (12) triggers the limit switch (13) to start time measurement, the striking hammer (11) is arranged at the tail end of the striking rod (10), when the striking rod (10) is struck by the striking slider (9), the striking hammer (11) strikes the fuse, and the fuse (14) on the cushion seat (16) is fused when the fuse is detonated, the time measurement device measures the delay action time of the fuse when the time measurement power supply connected by the time measurement power line (15) is interrupted and the time measurement is ended.

2. The accurate time measuring mechanism of the low-voltage time measuring box according to claim 1, wherein the striking slider (9) is arranged above the box body (1), the striking rod (10) is arranged below the striking slider (9), and the striking slider (9) quickly strikes the striking rod (10) along the sliding rod under the action of gravity.

3. The accurate time measuring mechanism of the low-voltage time measuring box according to claim 1, wherein the touch block (12) is located at one side of the striking slider (9), and the limit switch (13) is arranged at one side corresponding to the touch block (12) above the box body (1).

4. A low-pressure time measurement box is characterized by comprising the accurate time measurement mechanism of the low-pressure time measurement box according to any one of claims 1 to 3, wherein the box body (1) is provided with an air suction hole for connecting a vacuum pump to vacuumize the box body (1) to form different low-pressure environments.

5. The low pressure measurement chamber of claim 4, further comprising: 8 groups of compression bolts (3) and compression nuts (4) are arranged between the box door (2) and the box body (1), 2 groups of compression bolts and compression nuts are arranged on each side, after the box door (2) is closed, the compression bolts (3) are fastened, and the box door (2) and the box body (1) are tightly attached and sealed through the compression nuts (4).

6. A low pressure measurement chamber as claimed in claim 4 or claim 5, further comprising: the explosion venting device comprises an explosion venting cylinder (5), an explosion venting piston (6), a spring (7) and an O-shaped sealing ring (8), wherein the explosion venting cylinder (5) is positioned on a box body (1), the explosion venting piston (6) is positioned in the explosion venting cylinder (5) and can move as a piston in the explosion venting cylinder (5), the spring (7) is sleeved on the explosion venting piston (6), the O-shaped sealing ring (8) is positioned on a contact surface of the explosion venting piston (6) and the box body (1), when the air pressure in the air pumping box body (1) is reduced, the explosion venting piston (6) is more attached to the surface of the box body to compress the O-shaped sealing ring (8) due to pressure difference, so that sealing is ensured, after fuze is initiated, shock waves push the explosion venting piston (6) to open an explosion venting port, so that the pressure in the box body (1) is reduced to normal pressure, and safety when the box body (1) is opened is ensured.

7. The low-pressure time measuring box according to claim 6, characterized in that the explosion venting cylinder (5) is arranged at one side of the box body (1) and is connected and sealed.

8. The method of claim 6, comprising the steps of:

1) after a test fuse is placed in the box body (1), 8 groups of compression bolts (3) and compression nuts (4) are screwed down to enable the box door (2) and the box body (1) to be tightly attached and sealed;

2) the box body (1) is vacuumized by connecting a vacuum pump through an air exhaust hole, and an explosion venting piston (6) automatically compresses an O-shaped sealing ring (8) under a low-pressure environment to ensure that the box body (1) is sealed;

3) the striking slide block (9) is put down, the striking slide block (9) falls under the action of gravity, the contact block (12) is driven to trigger the limit switch (13) to automatically start the time measurement device to start time measurement, the striking slide block (9) quickly strikes the striking rod (10), the striking hammer (11) strikes the fuse to detonate, the fuse wire (14) on the pad seat (16) is fused when the fuse detonates, the time measurement power supply connected through the time measurement power line (15) is interrupted, the time measurement is automatically terminated, the time measurement device measures the fuse delay action time, the shock wave pushes the explosion venting piston (6), and the explosion venting port is automatically opened, so that the pressure in the box body (1) is reduced to normal pressure;

4) and after the test is finished, the box door (2) can be safely opened.

Technical Field

The invention relates to equipment used in the performance test field of military fuses, in particular to an accurate time measuring mechanism of a low-voltage time measuring box, the low-voltage time measuring box and a time measuring method.

Background

The fuse has the function of detonating the bomb, when the bomb flies to the enemy, the bomb cannot be detonated within a certain distance (which is required to be larger than the killing distance) from the enemy, namely the fuse can be detonated after a certain time (called fuse delay action time), so that the safety of personnel in the enemy can be ensured. The pressure is low in the plateau environment, the delay action time of the fuse is prolonged, and the use efficiency of the product is influenced. It is necessary to test the delay action time of the fuse, and the test conditions can simulate different altitude heightsIn a low-pressure environment, the military requires that the pressure in the container is respectively reduced to 10 x 10⁴Pa、8×10⁴Pa、6×10⁴Pa、5×10⁴Pa, time measurement is performed and must be accurate.

In the past, when a stopwatch is used for listening to sound in a steel box under normal temperature and pressure, manual detonation and stopwatch timing are adopted to test the delay time of a fuse, the timing precision (0.01 second) of the stopwatch is relatively low, and starting and stopping points of time testing need to be manually judged, so that the consistency of a testing result is poor, the precision is low, and the error is large.

The device for accurately measuring the delay time of the detonation of the novel fuse under the low-voltage state is developed, and the delay action time of the fuse is very accurate by utilizing the principle of opening and closing a circuit.

Disclosure of Invention

The invention aims to provide an accurate time measuring mechanism of a low-voltage time measuring box and the low-voltage time measuring box, which solve the three problems: 1) accurately measuring the delay time of detonation; 2) a low-pressure space is generated and ensured during detonation; 3) how to release the pressure after explosion.

In order to achieve the purpose, the invention adopts the following technical scheme:

an accurate time measuring mechanism of a low-voltage time measuring box comprises: the box body (1), a box door (2), a striking slider (9), a striking rod (10), a striking hammer (11), a touch block (12), a limit switch (13), a fuse (14), a time measurement power line (15) and a cushion seat (16), wherein the box body (1) is opened and closed through the box door (2), a fuse is placed on the cushion seat (16) and sealed in the box body (1), the striking slider (9) can slide, the touch block (12) is fixedly connected with the striking slider (9) and slides along with the striking slider (9), when the striking slider (9) slides to strike the striking rod (10), the touch block (12) triggers the limit switch (13) to start time measurement, the striking hammer (11) is arranged at the tail end of the striking rod (10), when the striking rod (10) is struck by the striking slider (9), the striking hammer (11) strikes the fuse, and the fuse (14) on the cushion seat (16) is fused when the fuse is detonated, the time measurement device measures the delay action time of the fuse when the time measurement power supply connected by the time measurement power line (15) is interrupted and the time measurement is ended.

The technical scheme provides an accurate time measuring mechanism, timing is started from the time when a fuse is struck, the time when the detonation of the fuse is stopped is counted, and the obtained time difference is the delay action time of the fuse.

Furthermore, the accurate time measurement mechanism of low pressure time measurement case, strike slider (9) and set up in the top of box (1), strike pole (10) are located the below of striking slider (9), strike the pole (10) fast under the action of gravity along the slide bar along strike slider (9).

Furthermore, the accurate time measuring mechanism of the low-voltage time measuring box is characterized in that the touch block (12) is positioned on one side of the striking sliding block (9), and the limit switch (13) is arranged on one side, corresponding to the touch block (12), above the box body (1).

The low-pressure time measurement box comprises the accurate time measurement mechanism of the low-pressure time measurement box, wherein the box body (1) is provided with an air suction hole for connecting a vacuum pump to vacuumize the box body (1) to form different low-pressure environments.

Further, the low pressure time measuring box further comprises: 8 groups of compression bolts (3) and compression nuts (4) are arranged between the box door (2) and the box body (1), 2 groups of compression bolts and compression nuts are arranged on each side, after the box door (2) is closed, the compression bolts (3) are fastened, and the box door (2) and the box body (1) are tightly attached and sealed through the compression nuts (4).

Further, the low pressure time measuring box further comprises: the explosion venting device comprises an explosion venting cylinder (5), an explosion venting piston (6), a spring (7) and an O-shaped sealing ring (8), wherein the explosion venting cylinder (5) is positioned on a box body (1), the explosion venting piston (6) is positioned in the explosion venting cylinder (5) and can move as a piston in the explosion venting cylinder (5), the spring (7) is sleeved on the explosion venting piston (6), the O-shaped sealing ring (8) is positioned on a contact surface of the explosion venting piston (6) and the box body (1), when the air pressure in the air pumping box body (1) is reduced, the explosion venting piston (6) is more attached to the surface of the box body to compress the O-shaped sealing ring (8) due to pressure difference, so that sealing is ensured, after fuze is initiated, shock waves push the explosion venting piston (6) to open an explosion venting port, so that the pressure in the box body (1) is reduced to normal pressure, and safety when the box body (1) is opened is ensured.

Further, according to the low-pressure time measuring box, the explosion venting cylinder (5) is located on one side of the box body (1) and is connected and sealed.

An accurate time measuring method of a low-voltage time measuring box comprises the following steps:

1) after a test fuse is placed in the box body (1), 8 groups of compression bolts (3) and compression nuts (4) are screwed down to enable the box door (2) and the box body (1) to be tightly attached and sealed;

2) the box body (1) is vacuumized by connecting a vacuum pump through an air exhaust hole, and an explosion venting piston (6) automatically compresses an O-shaped sealing ring (8) under a low-pressure environment to ensure that the box body (1) is sealed;

3) the striking slide block (9) is put down, the striking slide block (9) falls under the action of gravity, the contact block (12) is driven to trigger the limit switch (13) to automatically start the time measurement device to start time measurement, the striking slide block (9) quickly strikes the striking rod (10), the striking hammer (11) strikes the fuse to detonate, the fuse wire (14) on the pad seat (16) is fused when the fuse detonates, the time measurement power supply connected through the time measurement power line (15) is interrupted, the time measurement is automatically terminated, the time measurement device measures the fuse delay action time, the shock wave pushes the explosion venting piston (6), and the explosion venting port is automatically opened, so that the pressure in the box body (1) is reduced to normal pressure;

4) and after the test is finished, the box door (2) can be safely opened.

The invention has the advantages that: the detonation time is accurately and timely measured by utilizing the circuit fusing principle; by utilizing the pressure difference, the piston at the pressure relief opening is more tightly attached; the explosion venting device is detonated by utilizing gravity hammering, after a fuse is exploded, shock waves push the explosion venting piston to move outwards, so that an explosion venting port is opened, the internal pressure is reduced to a normal state, and a box door can be opened safely.

Drawings

FIG. 1 is a top view of a low pressure measurement chamber;

FIG. 2 is a front view of the low pressure test chamber;

FIG. 3 is a cross-sectional view A-A of the low pressure measurement chamber;

FIG. 4 is a cross-sectional view of the low pressure measurement chamber at B;

reference numbers in the figures: 1-a box body; 2-a box door; 3-pressing the bolt; 4-pressing the nut; 5-explosion venting cylinder; 6-explosion venting piston; 7-a spring; 8-O-shaped sealing rings; 9-striking the slider; 10-a striking rod; 11-a hammer; 12-a touch block; 13-limit switch; 14-fuse wire; 15-time measuring power line; 16-shoe.

Detailed Description

The present invention will be further described with reference to the accompanying drawings so as to facilitate the understanding of the present invention by those skilled in the art.

The attached figures 1-4 show a low-voltage time measuring box, which comprises: the explosion venting device comprises a box body (1), a box door (2), a compression bolt (3), a compression nut (4), an explosion venting cylinder (5), an explosion venting piston (6), a spring (7), an O-shaped sealing ring (8), a striking slider (9), a striking rod (10), a striking hammer (11), a touch block (12), a limit switch (13), a fuse (14), a time measuring power line (15) and a cushion seat (16); the cushion seat (16) is positioned in the box body (1) and used for placing a fuse, a fuse wire (14) is arranged below the cushion seat (16) for placing the fuse, the fuse wire (14) is connected with a time measurement power line (15), the fuse wire (14) is fused after the fuse is detonated, the time measurement power line (15) is connected with the time measurement power line and is powered off, the box body (1) needs to be sealed, the sealing between the box door (2) and the box body (1) is realized through 8 groups of compression bolts (3) and compression nuts (4), the pressure in the box body (1) can be increased after the fuse is detonated, the sealing during testing and the pressure relief after the detonation striking are automatically realized through arranging a detonation venting cylinder (5), a venting piston (6), a spring (7) and an O-shaped sealing ring (8), the low-pressure environment is realized through connecting a suction hole with a suction vacuum pump, and the principle of an accurate time measurement mechanism is that a sliding block (9) slides down under the action of, through the position design that striking pole (10) and limit switch (13) correspond, when striking slider (9) strikes striking pole (10), touch block (12) trigger limit switch (13) and start the time measurement device and begin the timing, the detonator is detonated after the detonator delay action time under the impact of hammer (11), fuse wire (14) fusing after the detonation, the timing ends, begin the timing when the detonator is struck, end the timing when detonating, the automatic recording time, need not manual intervention timing, time measurement accuracy.

The above examples are only intended to illustrate specific embodiments of the present invention, but not to limit the present invention, and it will be apparent to those skilled in the art that several modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should be construed as the protection scope of the present invention.