阅读说明：本技术 气囊爆破试验夹具 (Air bag blasting test fixture ) 是由 张振华 刘仁凯 张重杰 王宏芝 杨阳 蔺凤英 吴燕 于 2021-07-20 设计创作，主要内容包括：本发明具体涉及一种气囊爆破试验夹具；包括夹具腔体,夹具腔体为上部为敞口的箱体,夹具腔体的前面板和左侧面板上共同铰接有L形的压板,夹具腔体的腔体内安装有囊体充气支撑辅助块,靠近夹具腔体后面板容纳腔内设置有缓冲阻尼器,夹具腔体前面板上还设置有进气嘴支撑圈,与进气嘴支撑圈相对应的夹具腔体前面板上还安装有进气嘴接口支架,进气嘴接口支架上设有快速锁紧螺母,夹具腔体的左右面板外侧共同铰接有夹具腔体敞口处的防护罩；本发明保证了气囊充气过程中因气囊尺寸和体积变化而所受的反力不会瞬间增加也不会瞬间减小,实现充气气流均匀流入,也实现减小瞬间破裂时气囊所受反力的冲击作用,提高了试验的安全性。(The invention relates to an air bag blasting test fixture; the clamp comprises a clamp cavity, the clamp cavity is a box body with an open upper part, an L-shaped pressing plate is hinged to a front panel and a left side panel of the clamp cavity together, a bag body inflating and supporting auxiliary block is installed in the clamp cavity, a buffer damper is arranged in a containing cavity close to a rear panel of the clamp cavity, an air inlet nozzle support ring is further arranged on the front panel of the clamp cavity, an air inlet nozzle interface support is further installed on the front panel of the clamp cavity corresponding to the air inlet nozzle support ring, a quick locking nut is arranged on the air inlet nozzle interface support, and a protective cover at the open part of the clamp cavity is hinged to the outer sides of the left panel and the right panel of the clamp cavity together; the invention ensures that the counter force borne by the air bag due to the size and volume change of the air bag in the air inflation process cannot be instantly increased or instantly reduced, realizes the uniform inflow of inflation airflow, also realizes the reduction of the impact effect of the counter force borne by the air bag during instant rupture, and improves the safety of the test.)

1. An air bag explosion test fixture is characterized by comprising a fixture cavity (1), wherein the fixture cavity (1) is a box body with an open upper part, an L-shaped notch is formed in a front panel and a left side panel of the fixture cavity (1) together, an L-shaped pressing plate (8) is hinged to the notch, an air bag inflating and supporting auxiliary block (2) is installed in the cavity of the fixture cavity (1), accommodating cavities are respectively formed in two side faces, close to the front panel and the rear panel of the fixture cavity (1), of the air bag inflating and supporting auxiliary block (2), an air bag is placed in the accommodating cavity, close to the rear panel of the fixture cavity (1), a buffer damper (3) is arranged in the accommodating cavity, a connecting pipe is installed on one side, facing the rear panel of the fixture cavity (1), of the buffer damper (3), and a spring (11) is sleeved on the outer side of the connecting pipe, a pressure spring screw (10) is screwed at the end part of the connecting pipe, and the pressure spring screw (10) penetrates through the rear panel of the clamp cavity (1) and then is in threaded connection with the inside of the connecting pipe; still be provided with suction nozzle lock ring (5) on anchor clamps cavity (1) front panel, offer the breach that is used for holding suction nozzle lock ring (5) on clamp plate (8), still install suction nozzle interface support (6) on anchor clamps cavity (1) front panel corresponding with suction nozzle lock ring (5), be equipped with quick lock nut (7) on suction nozzle interface support (6), the panel outside articulates jointly has protection casing (9) of anchor clamps cavity (1) opening department about anchor clamps cavity (1).

2. The clamp for air bag bursting tests according to claim 1, wherein a rubber pad (12) is laid on the inner side of the front panel of the clamp cavity (1).

3. The clamp for the air bag bursting test according to claim 1, wherein the pressing plate (8) is hinged with the horizontal end of the notch of the left panel of the clamp cavity (1), and the pressing plate (8) moves in a vertical plane.

4. The clamp for the air bag bursting test according to claim 1, wherein the accommodating cavity of the bag body inflating and supporting auxiliary block (2) close to the front panel of the clamp cavity (1) is semi-cylindrical.

5. The clamp for the air bag bursting test according to claim 1, wherein the accommodating cavity of the bag body inflating and supporting auxiliary block (2) close to the rear panel of the clamp cavity (1) is two semi-cylindrical cavities arranged in parallel, and a buffer damper (3) is respectively arranged in each of the two semi-cylindrical cavities.

6. The clamp for the air bag bursting test according to any one of claims 1 to 5, wherein the buffer damper (3) is made of a composite polyester elastomer.

7. The air bag bursting test clamp according to any one of claims 1 to 5, wherein the front panel of the clamp cavity (1) is further provided with two air inlet nozzle support rings (5), and the number of the air inlet nozzle interface brackets (6) is also two.

Technical Field

The invention relates to an auxiliary tool for leakage and blasting design of rubber bag products, in particular to an air bag blasting test fixture.

Background

The air bag is a main part of the warhead of the aviation bomb and is an action execution element for gas bomb throwing. It must have high burst strength, i.e. good air tightness under low inflation pressure, and burst in hundreds of milliseconds at burst pressure not lower than 7 MPa. According to the method for testing the air bag performance, the air bag performance explosion performance test fixture is designed and manufactured by combining the conditions of the shape of the air bag, the deformation characteristic in the inflating process, the clamping convenience, the experimental safety and the like through measurement, calculation, strength check and deformation tests of the buffer damper.

The original test fixture mainly comprises a fixture cavity, a sac body inflation supporting block, an air inlet connecting nozzle, an air inlet nozzle supporting ring, an air inlet nozzle interface bracket, a locking nut, a front guard plate, a rear back plate and other elements, and is simple in structure. During the test, the size change, the volume change and the stress change of the air bag before and after the air bag is inflated exist, and during the explosion, the alternating pressure can impact the clamp cavity and other elements, so that the problem of low safety exists.

Disclosure of Invention

The invention provides an air bag blasting test fixture for solving the problems that the original test fixture has impact action on a fixture cavity and other elements due to alternating pressure and has low safety, so that the counter force borne by an air bag due to the size and volume change of the air bag in the air bag inflation process cannot be increased or reduced instantly, the uniform inflow of inflation airflow is realized, the impact action of the counter force borne by the air bag during instant rupture is also realized, and the safety of the test is improved.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an airbag explosion test fixture comprises a fixture cavity, wherein the fixture cavity is a box body with an open upper part, an L-shaped notch is jointly formed in a front panel and a left side panel of the fixture cavity, an L-shaped pressing plate is hinged to the notch, an airbag inflation supporting auxiliary block is installed in the cavity of the fixture cavity, accommodating cavities are respectively formed in two side faces, close to the front panel and a rear panel of the fixture cavity, of the airbag inflation supporting auxiliary block, the accommodating cavities close to the front panel of the fixture cavity are used for placing an airbag, a buffer damper is arranged in the accommodating cavities close to the rear panel of the fixture cavity, a connecting pipe is installed on one side, facing towards the rear panel of the fixture cavity, of the buffer damper, a spring is sleeved outside the connecting pipe, a pressure spring screw is screwed at the end part of the connecting pipe, and the pressure spring screw penetrates through the rear panel of the fixture cavity and then is in threaded connection with the connecting pipe; still be provided with the suction nozzle lock ring on the anchor clamps cavity front panel, set up the breach that is used for holding the suction nozzle lock ring on the clamp plate, still install suction nozzle interface support on the anchor clamps cavity front panel corresponding with the suction nozzle lock ring, be equipped with quick lock nut on the suction nozzle interface support, the common articulated protection casing that has the uncovered department of anchor clamps cavity in the panel outside about the anchor clamps cavity.

The working process is as follows: during the test, the air inlet nozzle supporting ring is arranged on the air inlet nozzle of the air bag, the pressing plate is lifted, the air bag provided with the air inlet nozzle supporting ring is fixed in the groove of the front panel of the clamp cavity, the pressing plate is put down and the notch on the pressing plate is used for assisting in pressing the air inlet nozzle supporting ring and locking the pressing plate, then the air inlet connecting nozzle is screwed into the air inlet nozzle of the air bag through a quick locking nut on a manual rotating air inlet nozzle interface support, the air inlet nozzle is connected, the pretightening force of the spring is adjusted through manually rotating the pressure spring screw, the distance between the air inlet supporting auxiliary block of the bag body and the air bag can be adjusted through axial movement of the pressure spring screw, the original buffering damping size of the buffering damper can be adjusted, the protective cover is put down and is locked, and the blasting test can be carried out. During the test, compressed air enters the inner cavity of the air bag through the air inlet connecting nozzle, the volume of the air bag begins to increase, the air pressure inside the air bag enables the air bag to inflate the auxiliary supporting block to retreat, meanwhile, the air bag inflates the auxiliary supporting block to press the inflatable buffer damper to deform to generate counter force, the spring is gradually compressed, the counter force is gradually increased, when the pressure of the inner cavity of the air bag is larger than 7MPa, the air bag breaks, the counter force disappears suddenly, at the moment, the buffer damper and the spring begin to recover to a free state slowly, and the test is finished.

Compared with the prior art, the invention has the following beneficial effects:

the test fixture has the advantages of compact structure, fewer constituent elements and convenience in maintenance, and the operability and safety are fully considered during design. The pressure impact that bears in the experiment is bigger, has chooseed the buffering damper, the design spring of compound polyester elastomer material for use through the atress calculation, utilizes the deformability and the spring of buffering damper deformation in order to satisfy the gasbag and support the condition that the counter-force slowly increased and support the counter-force slowly reduce after breaking when aerifing, guarantees that internal pressure slowly risees and the back pressure that breaks slowly reduces when the gasbag is aerifyd, properly slows down the quick pressure variation in gasbag inside. Therefore, the counter force borne by the airbag due to the size and volume change of the airbag in the inflating process of the airbag is not increased or reduced instantly, the uniform inflow of inflation airflow is realized, the impact effect of the counter force borne by the airbag during instant rupture is also reduced, the operability and the safety of a test are improved, and the accuracy of a test result is guaranteed.

Drawings

FIG. 1 is an exploded view of the clamp for the air bag burst test of the present invention.

Fig. 2 is a schematic structural view of the airbag burst test fixture of the present invention.

The figures are labeled as follows:

the method comprises the following steps of 1-a clamp cavity, 2-a bag body inflatable supporting auxiliary block, 3-a buffer damper, 4-an air inlet connecting nozzle, 5-an air inlet nozzle supporting ring, 6-an air inlet nozzle interface bracket, 7-a quick locking nut, 8-a pressing plate, 9-a protective cover, 10-a pressure spring screw, 11-a spring and 12-a rubber pad.

Detailed Description

The present invention is further illustrated by the following specific examples.

Examples

As shown in figures 1 and 2, the air bag blasting test fixture comprises a fixture cavity 1, the fixture cavity 1 is a box body with an open upper part, an L-shaped notch is formed on the front panel and the left panel of the fixture cavity 1, an L-shaped pressing plate 8 is hinged at the notch, a sac body inflating and supporting auxiliary block 2 is arranged in the cavity of the clamp cavity 1, two side faces of the sac body inflating and supporting auxiliary block 2, which are close to the front panel and the rear panel of the clamp cavity 1, are respectively provided with an accommodating cavity, the accommodating cavity close to the front panel of the clamp cavity 1 is used for placing an air bag, a buffer damper 3 is arranged in the accommodating cavity close to the rear panel of the clamp cavity 1, one side of the buffer damper 3, which faces the rear panel of the clamp cavity 1, is provided with a connecting pipe, a spring 11 is sleeved outside the connecting pipe, a pressure spring screw 10 is screwed at the end part of the connecting pipe, and the pressure spring screw 10 penetrates through the rear panel of the clamp cavity 1 and then is in threaded connection with the inside of the connecting pipe; still be provided with two suction nozzle lock rings 5 on the anchor clamps cavity 1 front panel, set up the breach that is used for holding suction nozzle lock ring 5 on the clamp plate 8, still install two suction nozzle interface supports 6 on the anchor clamps cavity 1 front panel corresponding with suction nozzle lock ring 5, be equipped with quick lock nut 7 on the suction nozzle interface support 6, the panel outside articulates jointly has the protection casing 9 of the uncovered department of anchor clamps cavity 1 about anchor clamps cavity 1.

The air inlet nozzle support ring 5 can be conveniently and quickly positioned on the front panel of the clamp cavity 1 after being sleeved with an air bag air nozzle, is supported by the pressing plate 8 in an auxiliary way, and is quickly fixed and locked with an air inlet connecting nozzle through the air inlet nozzle interface support 6 and the quick locking nut 7; the prepressing force of the spring on the inflatable supporting unit of the bag body can be adjusted by adjusting the pressure spring screw 10 to obtain a proper buffering effect; so as to meet the requirements of the air bag bursting test and improve the test operability.

Furthermore, a rubber pad 12 is laid on the inner side of the front panel of the clamp cavity 1, and the rubber pad 12 is a thick rubber pad and has a buffering effect on the front panel and the arranged elements of the clamp cavity 1.

Furthermore, the pressing plate 8 is hinged with the horizontal end of the notch of the panel on the left side of the clamp cavity 1, and the pressing plate 8 moves in a vertical plane.

Furthermore, the containing cavity of the auxiliary inflating and supporting block 2 of the capsule body close to the front panel of the clamp cavity 1 is semi-cylindrical and is matched with the hyperbolic profile shape before the plastic deformation is achieved when the air bag is inflated, the containing cavity of the auxiliary inflating and supporting block 2 of the capsule body close to the rear panel of the clamp cavity 1 is two semi-cylindrical cavities which are arranged in parallel, and the two semi-cylindrical cavities are internally provided with a buffer damper 3 respectively. This utricule is aerifyd and is supported auxiliary block 2 and hug closely buffer damper 3, the condition that the back support counter-force slowly reduced after supporting the counter-force slowly increases and breaking through the deformability of buffer damper 3 deformation in order to satisfy the gasbag when aerifing, the internal pressure slowly risees and the back pressure that breaks slowly reduces when guaranteeing the gasbag to aerify, properly slow down the inside quick pressure variation of gasbag, effectively reduce the impact of alternating pressure to components such as anchor clamps cavity 1, suction nozzle lock ring 5, suction nozzle interface support 6.

Furthermore, the buffer damper 3 is made of a composite polyester elastomer, so that the conditions that the supporting counter force is slowly increased when the air bag is inflated and the supporting counter force is slowly reduced after the air bag is broken are met, the internal pressure is slowly increased when the air bag is inflated and the pressure is slowly reduced after the air bag is broken, and the rapid pressure change in the air bag is properly relieved.

During the test, the air inlet nozzle support ring 5 is arranged on the air inlet nozzle of the air bag, the pressing plate 8 is lifted, the air bag with the air inlet nozzle support ring 5 is fixed in the groove of the front panel of the clamp cavity 1, the pressing plate 8 is put down and the notch on the pressing plate is utilized to assist in pressing the air inlet nozzle support ring 5 and locking the pressing plate 8, the air inlet connecting nozzle 4 is screwed into the air inlet nozzle of the air bag through the manual rotation of the quick locking nut 7 on the air inlet nozzle interface support 6, the air inlet nozzle is connected, the pre-tightening force of the spring 11 is adjusted through the manual rotation of the pressure spring screw 10, the distance between the air-inflating support auxiliary block 2 of the bag body and the air bag can be adjusted through the axial movement of the pressure spring screw 10, the original buffering damping size of the buffering damper 3 can be adjusted, the protective cover 9 is put down and is tightly pinned, and the blasting test can be carried out. During the test, compressed air enters the inner cavity of the air bag through the air inlet connecting nozzle 4, the volume of the air bag begins to increase, the air pressure inside the air bag enables the air bag to inflate the support auxiliary block 2 to retreat, meanwhile, the air bag inflates the support auxiliary block 2 to press the inflatable buffer damper 3 to deform to generate counter force, the spring 11 is gradually compressed, the counter force is gradually increased, when the pressure in the inner cavity of the air bag is larger than 7MPa, the air bag breaks, the counter force disappears suddenly, at the moment, the buffer damper 3 and the spring 11 begin to recover to a free state slowly, and the test is finished.

The air bag comprises the conditions of shape change, volume change, stress change and stress change of the air bag and the clamp cavity 1 in the process of an inflation blasting test. The shape of the air bag is changed from a flat rectangle into a drum shape with a hyperbolic contour in the inflating process, the air bag belongs to elastic deformation of a rubber piece, the pressure rises along with the continuous inflation of compressed air, the shape of the air bag is subjected to plastic deformation until the air bag is broken, the inflating quantity at the moment is the compressed air quantity required by each air bag test, and the air bag can be obtained according to the change of the shape size of the air bag and the inflating pressure of an air source in the inflating process. The instantaneous volume change of the air bag in the inflating process has larger pressure impact on the air bag inflating support auxiliary block 2 and the air inlet nozzle interface bracket 6, the air bag inflating support auxiliary block 2 matched with the hyperbolic profile shape before plastic deformation is achieved during air bag inflation is designed in the clamp, the air bag inflating support auxiliary block 2 is tightly attached to the buffer damper 3, the condition that the supporting counter force of the air bag is slowly increased during air bag inflation and the supporting counter force is slowly reduced after rupture is met through the deformability of the buffer damper 3, the slow increase of the internal pressure and the slow reduction of the pressure after rupture are ensured during air bag inflation, the rapid pressure change in the air bag is properly relieved, and the impact of alternating pressure on elements such as a clamp cavity, an air inlet nozzle support ring and the air inlet nozzle interface bracket is effectively reduced; in order to prevent splash after the air bag is broken from hurting people, a protective cover 9 is designed at the top of the clamp cavity 1. These are all effective in demonstrating the operability and safety of the test.

The test fixture provided by the invention designs the unique capsule inflatable support auxiliary block 2, realizes that the support counter force of the capsule inflatable support auxiliary block 2 is slowly increased and slowly reduced along with the gradual swelling and instant rupture of the air bag, so as to eliminate the tearing of the air inlet nozzle of the air bag and the impact action on the pressure plate and the fixture cavity caused by pressure change caused by instant inflation and rupture pressure relief, and also realizes the adjustment of the original buffer damping. The test fixture can be popularized to the leakage and explosion evaluation tests of rubber bag products, can be used as an explosion test device for the rubber product air bags of multiple varieties of single air inlet nozzles and double air inlet nozzles at present, and plays a good quality guarantee role in the explosion performance tests of the air bags of two models at present.

The air inlet nozzle support ring 5, the air inlet nozzle interface support 6, the quick locking nut 7 and the pressing plate 8 are designed on the front panel of the clamp cavity 1, the quick positioning and clamping are realized by adopting a positioning mode of two holes on one surface on the front panel of the clamp cavity 1, the air inlet connecting nozzle can be connected with the air bag air inlet nozzle in a sealing way through the quick locking nut, the convenient positioning and the sealing reliability are realized, the operability of the test is improved

Select for use the buffer damper 3, the design spring 11 of compound polyester elastomer material through the atress calculation to satisfy the gasbag and support the slow increase of counter-force and the condition that the back support counter-force slowly reduces after breaking when aerifing, guarantee that internal pressure slowly risees and the back pressure that breaks slowly reduces when the gasbag is aerifyd, properly slow down the inside quick pressure variation of gasbag. The uniform inflow of inflation airflow is realized, the impact action of the counterforce borne by the air bag during instantaneous rupture is reduced, and the safety of the test is improved.