阅读说明：本技术 混合式气体发生器注气装置与注气工艺 (Gas injection device and gas injection process of hybrid gas generator ) 是由 刘超 李贤萍 于 2021-08-16 设计创作，主要内容包括：本发明公开了一种混合式气体发生器注气装置与注气工艺,其技术方案要点是注气装置,包括机架,机架设有放置板,放置板开设有通孔,放置板的上方设有活塞杆指向放置的上压气缸；放置板的下方设有竖直的注气管,注气管的上端伸入通孔,注气管内设有竖直升降的焊接杆,注气管连接有气源；机架设有电阻焊接机,电阻焊接机的正极线设在放置板的上表面,电阻焊接机的负极线设置在焊接杆；注气工艺,包括步骤,先,金属球放入到焊接杆的上端；再,横向气缸的活塞杆抵压在金属球上端；然后,壳体和注气管的密封圈压合；在之后,壳体内注满压缩的惰性气体；接着,焊接杆上升,金属球进入到壳体的开孔；之后,电阻焊接机启动,金属球的边沿和开孔的边沿实现焊接密封。(The invention discloses a gas injection device and a gas injection process of a hybrid gas generator, and the technical scheme is that the gas injection device comprises a rack, wherein the rack is provided with a placing plate, the placing plate is provided with a through hole, and an upper pressure cylinder with a piston rod pointing to the placing is arranged above the placing plate; a vertical gas injection pipe is arranged below the placing plate, the upper end of the gas injection pipe extends into the through hole, a vertically lifting welding rod is arranged in the gas injection pipe, and the gas injection pipe is connected with a gas source; the frame is provided with a resistance welding machine, a positive electrode wire of the resistance welding machine is arranged on the upper surface of the placing plate, and a negative electrode wire of the resistance welding machine is arranged on the welding rod; the gas injection process comprises the steps of firstly, placing a metal ball at the upper end of a welding rod; then, a piston rod of the transverse cylinder is pressed against the upper end of the metal ball; then, the shell is pressed with a sealing ring of the gas injection pipe; thereafter, the housing is filled with compressed inert gas; then, the welding rod rises, and the metal ball enters the opening of the shell; and then, starting the resistance welding machine, and realizing welding sealing of the edge of the metal ball and the edge of the opening.)

1. The utility model provides a hybrid gas generator gas injection device, includes frame (1), characterized by: the frame (1) is provided with a placing plate (2), the placing plate (2) is provided with a through hole (22),

an upper air cylinder (3) with a piston rod pointing to the placing plate (2) is arranged above the placing plate (2);

a vertical gas injection pipe (4) is arranged below the placing plate (2), and the upper port of the gas injection pipe (4) extends into the through hole (22) to be attached to the gas inlet of the gas generator;

a welding rod (5) which can vertically lift is arranged in the gas injection pipe (4), a metal ball (91) for plugging a gas inlet hole in the gas generator is arranged on the upper end surface of the welding rod (5), and the gas injection pipe (4) is connected with a gas source (81);

frame (1) is equipped with resistance welding machine (7), and the positive pole line of resistance welding machine (7) is established at the upper surface of placing board (2), and the negative pole line setting of resistance welding machine (7) is at welding pole (5).

2. The hybrid gas generator gas injection apparatus of claim 1, wherein: the upper surface of the placing plate (2) is provided with a groove (21) for placing the gas generator, the through hole (22) penetrates through the groove (21), and the positive wire of the resistance welding machine (7) is arranged in the groove (21).

3. The hybrid gas generator gas injection apparatus of claim 2, wherein: the edge of the upper port of the gas injection pipe (4) is provided with an insulating sealing ring (41).

4. The hybrid gas generator gas injection apparatus of claim 3, wherein: a transverse cylinder (61) is fixed on the frame (1), a piston rod of the transverse cylinder (61) slides in a sealing mode on the gas injection pipe (4), and the piston rod of the transverse cylinder (61) is separated and blocked above the metal ball (91) when extending out.

5. The hybrid gas generator gas injection apparatus of claim 4, wherein: the frame (1) is equipped with vertical cylinder (62), and welding rod (5) are fixed at the piston rod of vertical cylinder (62).

6. The hybrid gas generator gas injection apparatus of claim 5, wherein: the gas source (81) is provided with a gas outlet pipe, the gas outlet pipe is connected with the gas injection pipe (4), the gas outlet pipe is provided with a stop valve (82), a proportional valve (83), an inflation valve (84) and an exhaust valve (85), and the gas outlet pipe is connected with a pressure detector (86).

7. The hybrid gas generator gas injection apparatus of claim 6, wherein: the upper end surface of the welding rod (5) is a concave arc-shaped curved surface (52).

8. The hybrid gas generator gas injection apparatus of claim 7, wherein: a metal elastic sheet (71) is arranged in the groove (21), and a positive wire of the resistance welding machine (7) is communicated with the metal elastic sheet (71).

9. The hybrid gas generator gas injection apparatus of claim 8, wherein: an insulating column (51) is fixed between the welding rod (5) and a piston rod of the vertical cylinder (62).

10. A gas injection process of a hybrid gas generator is characterized in that: comprises the following steps of (a) carrying out,

step 1, raising the welding rod (5) of claim 9, placing the welded metal ball (91) from the upper end of the gas injection pipe (4) into the upper end of the welding rod (5), and retracting the welding rod (5);

step 2, a piston rod of the transverse cylinder (61) extends out and is pressed against the upper end of the metal ball (91);

step 3, placing a shell (92) with an opening (93) in the side surface on the plate (2), aligning the opening (93) of the shell (92) with the through hole (22), and enabling the upper end of the gas injection pipe (4) to be attached to the opening (93) of the shell (92);

step 4, a piston rod of the upper air cylinder (3) extends out and abuts against the shell (92), so that the side surface of the shell (92) is tightly pressed with the sealing ring (41) of the air injection pipe (4);

step 5, the gas source (81) is deflated, so that compressed inert gas is injected into the shell (92) until the pressure in the shell (92) and the gas injection pipe (4) is stable;

step 6, retracting a piston rod of the transverse cylinder (61), and lifting the welding rod (5) under the pushing of the vertical cylinder (62) until the metal ball (91) enters the opening (93) of the shell (92);

step 7, starting the resistance welding machine (7), and realizing welding sealing on the edge of the metal ball (91) and the edge of the opening (93);

and 8, closing the resistance welding machine (7), closing the gas source (81), and exhausting gas by the gas injection pipe (4).

Technical Field

The invention relates to production equipment and a production process of a gas generator, in particular to a gas injection device and a gas injection process of a hybrid gas generator.

Background

A chinese patent document No. CN201822198700.2 is retrieved, and its name is a hybrid gas generator for side airbag, which is mainly to seal high pressure mixed inert gas in the housing in advance, the original mixed compressed gas in the housing is heated to expand, the gas is expanded at the combustion position of the booster, the booster and the mixed compressed gas are used cooperatively, so as to reduce the usage of gas producing medicine, reduce the generation of heat and powder, protect the safety of the user, and the airbag is inflated quickly.

However, in the above solutions, it is difficult to seal the housing after the housing is filled with the inert gas, and the housing is easily leaked after being sealed due to the large internal pressure of the high-pressure mixed inert gas.

Disclosure of Invention

The first purpose of the invention is to provide a gas injection device of a hybrid gas generator, which can realize firm sealing of a shell by sealing an opening of the shell for gas inlet through welding in a high-pressure state.

The technical purpose of the invention is realized by the following technical scheme:

a gas injection device of a hybrid gas generator comprises a rack, wherein the rack is provided with a placing plate, the placing plate is provided with a through hole, and an upper pressure cylinder with a piston rod pointing to the placing plate is arranged above the placing plate; a vertical gas injection pipe is arranged below the placing plate, and the upper port of the gas injection pipe extends into the through hole to be attached to the gas inlet of the gas generator; a vertically lifting welding rod is arranged in the gas injection pipe, a metal ball for plugging a gas inlet hole in the gas generator is arranged on the upper end face of the welding rod, and the gas injection pipe is connected with a gas source; the frame is equipped with resistance welding machine, and resistance welding machine's positive pole line is established at the upper surface of placing the board, and resistance welding machine's negative pole line sets up at the welding rod.

By adopting the technical scheme, the gas generator is placed on the placing plate, the outer wall of the gas inlet hole in the gas generator is attached and sealed with the upper end part of the gas injection pipe, and the gas generator and the gas injection pipe are tightly pressed through the upper pressure cylinder, so that the gas inlet hole and the gas injection pipe are sealed and communicated;

and then, the gas injection pipe injects gas into the gas generator, the welding rod rises to send the metal ball into the gas inlet hole of the gas generator, and the resistance welding machine is started.

Resistance welding refers to a method of welding by applying a strong current through the contact point between an electrode and a workpiece, and generating heat from the contact resistance. When welding, a certain pressure is needed to be applied to the electrode and the workpiece. Resistance welding is classified into spot welding, projection welding, seam welding, butt welding, resistance bolt welding, and the like. Because the electrifying time is short, the production efficiency is high, and the welding quality is stable.

Preferably, the upper surface of the placing plate is provided with a groove for placing the gas generator, the through hole penetrates through the groove, and the positive wire of the resistance welding machine is arranged in the groove.

Through adopting above-mentioned technical scheme, the recess is used for the location to place gas generator, also is convenient for gas generator and positive line contact.

Preferably, the edge of the upper port of the gas injection pipe is provided with an insulating sealing ring.

Through adopting above-mentioned technical scheme, the effect of sealing washer is that the sealed effect when contradicting for making gas injection pipe and gas generator's outer wall is stable, and the insulating nature of sealing washer is the interference to resistance welding process production when reducing gas injection pipe and gas generator contact electrically conductive.

Preferably, the frame is fixed with horizontal cylinder, and the piston rod of horizontal cylinder is sealed to slide on the gas injection pipe, and the piston rod of horizontal cylinder separates when stretching out and keeps off above the metal ball.

Through adopting above-mentioned technical scheme, when the action is aerifyd to the gas injection pipe, the metal ball on the welding rod can take place upwards the drunkenness because of the factor of air current, consequently separates the piston rod of horizontal cylinder and keeps off in the metal ball top, can reduce the play action on the metal ball, and in the stage of aerifing, the metal ball can be more stable be located the welding rod.

Preferably, the frame is equipped with vertical cylinder, and the piston rod at vertical cylinder is fixed to the welding rod.

Through adopting above-mentioned technical scheme, the welding rod carries out the action of going up and down under the drive of vertical cylinder, has realized upwards carrying the action in the gas generator inlet port with the metal ball.

Preferably, the gas source is provided with an air outlet pipe, the air outlet pipe is connected with the gas injection pipe, the air outlet pipe is provided with a stop valve, a proportional valve, an inflation valve and an exhaust valve, and the air outlet pipe is connected with a pressure detector.

Through adopting above-mentioned technical scheme, stop valve, proportional valve, inflation valve and discharge valve set up and are used for controlling the air current switching and the atmospheric pressure size of outlet duct, and pressure detector is used for showing the intraductal atmospheric pressure numerical value of gas injection.

Preferably, the upper end surface of the welding rod is a concave arc-shaped curved surface.

Through adopting above-mentioned technical scheme, sunken arc curved surface is convenient for sinking of metal ball and is placed, and can cooperate with the piston rod of horizontal cylinder, because the upper end of this piston rod separates and keeps off, the metal ball is difficult to roll out the arc curved surface from the side direction.

Preferably, a metal elastic sheet is arranged in the groove, and a positive electrode wire of the resistance welding machine is communicated with the metal elastic sheet.

Through adopting above-mentioned technical scheme, metal shrapnel is for the stable switch-on of the outer wall of positive electrode line and gas generator.

Preferably, an insulating column is fixed between the welding rod and the piston rod of the vertical cylinder.

Through adopting above-mentioned technical scheme, the effect of insulated column is that reduce negative pole line and piston rod electricity and communicate, and when gas injection pipe and gas generator contact were electrically conductive, the insulated column can reduce the interference in the resistance welds.

The second purpose of the invention is to provide a gas injection process of the hybrid gas generator, which is used for plugging the air inlet opening of the shell by welding under a high-pressure state so as to realize firm plugging of the shell.

The technical purpose of the invention is realized by the following technical scheme:

a gas injection process of a hybrid gas generator comprises the following steps,

step 1, the welding rod of claim 6 is raised, and a welded metal ball is put into the upper end of the welding rod from the upper end of the gas injection pipe, and the welding rod is retracted;

step 2, a piston rod of the transverse cylinder extends out and is pressed against the upper end of the metal ball;

step 3, placing the shell with the opening on the side surface on a plate, wherein the opening of the shell is aligned with the through hole, and the upper end of the gas injection pipe is attached to the opening of the shell;

step 4, a piston rod of the upper pressure cylinder extends out and abuts against the shell, so that the side surface of the shell is tightly pressed with a sealing ring of the gas injection pipe;

step 5, the gas source is deflated, so that compressed inert gas is injected into the shell until the pressure in the shell and the pressure in the gas injection pipe are stable;

step 6, retracting a piston rod of the transverse cylinder, and lifting the welding rod under the pushing of the vertical cylinder until the metal ball enters the opening of the shell;

step 7, starting the resistance welding machine, and realizing welding sealing of the edge of the metal ball and the edge of the opening;

and 8, closing the resistance welding machine, closing the gas source, and exhausting by the gas injection pipe.

In conclusion, the invention has the following beneficial effects: compressed gas is injected into the shell through the gas injection pipe, the shell refers to the shell of the gas generator, constant high pressure is kept in the gas injection pipe, at the moment, the welding rod is ejected upwards in the gas injection pipe, the metal ball for plugging the opening of the shell rises into the opening, the opening refers to the gas inlet hole of the gas generator, then the resistance welding machine is started, and the metal ball and the shell are respectively connected with two ends of the resistance welding machine, so that the metal ball is welded with the edge of the opening, and the opening is plugged completely.

And the performance of the inert gas is very stable when the gas is compressed, so that the heat energy generated during the welding of the metal ball can not cause the explosion of the compressed gas.

The opening of the shell can be a horn-shaped hole, the large opening of the opening faces outwards, and the small opening of the opening points into the shell;

the opening of the shell can also be a spherical notch, so that the edge of the opening is matched with the metal ball;

the opening of the housing may be a straight through hole.

Drawings

FIG. 1 is a first schematic view of the structure of a gas injection apparatus according to the first embodiment;

FIG. 2 is a schematic structural view II of the gas injection apparatus in the example;

FIG. 3 is a schematic structural view of a welding rod, an insulating column and an arc-shaped curved surface in the embodiment;

FIG. 4 is a schematic diagram I of a gas injection process in an example;

FIG. 5 is a schematic diagram of a gas injection process in the second embodiment.

In the figure:

1. a frame;

2. placing the plate; 21. a groove; 22. a through hole;

3. an upper pressure cylinder;

4. a gas injection pipe; 41. a seal ring;

5. welding a rod; 51. an insulating column; 52. curved surface

61. A transverse cylinder; 62. a vertical cylinder;

7. resistance welding machine; 71. a metal spring sheet;

81. a gas source; 82. a stop valve; 83. a proportional valve; 84. an inflation valve; 85. an exhaust valve; 86. a pressure detector;

91. a metal ball; 92. a housing; 93. and (6) opening holes.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Embodiment 1, a gas injection device of a hybrid gas generator, refer to fig. 1-5, including frame 1, frame 1 is equipped with places board 2, places board 2 and is a flat board, and frame 1 includes a riser that metal was made, places board 2 and fixes on the riser, and other embodiments also can install vertical and horizontal track on the riser, will place board 2 and install in the track to realize placing board 2's vertical and lateral shifting. .

The upper surface of the placing plate 2 is provided with a groove 21, the groove 21 is long, the cross section of the groove 21 is semicircular, the groove 21 is used for placing a shell 92 waiting for inflation, the shell 92 refers to an inflated shell in the gas generator, and the outer surface of the shell 92 is cylindrical, so that the shell 92 can be placed in the groove 21 in a fitting manner.

The placing plate 2 is provided with a through hole 22, the through hole 22 penetrates the groove 21, and when the housing 92 is placed in the groove 21, the opening 93 of the housing 92 is placed in the through hole 22.

An upper air cylinder 3 with a piston rod pointing to the placing plate 2 is arranged above the placing plate 2, and a cylinder body of the upper air cylinder 3 is fixed on the rack 1; a vertical gas injection pipe 4 is arranged below the placing plate 2, the upper end of the gas injection pipe 4 extends into the through hole 22, and a sealing ring 41 is arranged on the upper end face of the gas injection pipe 4.

After the housing 92 is placed in the groove 21, the piston rod of the upper air cylinder 3 extends out and abuts against the housing 92, so that the housing 92 and the edge of the opening 93 are tightly attached to the sealing ring 41, and the housing 92 is stably mounted on the placing plate 2.

After the sealing ring 41 of the gas-injection pipe 4 and the housing 92 are butted against each other, the gas-injection pipe 4 and the opening 93 of the housing 92 are communicated with each other, and the gas-injection pipe 4 can inject gas into the housing 92.

The gas injection pipe 4 is connected with a gas source 81, the gas source 81 is provided with a gas outlet pipe, the gas outlet pipe is communicated with the gas injection pipe 4, the gas outlet pipe is provided with a stop valve 82, a proportional valve 83, an inflation valve 84 and an exhaust valve 85, and the gas outlet pipe is connected with a pressure detector 86.

Frame 1 is equipped with vertical cylinder 62, and welding rod 5 is fixed at the piston rod of vertical cylinder 62, and the hot melt is fixed with insulating column 51 between welding rod 5 and the piston rod of vertical cylinder 62, and insulating column 51 is the plastics post. The cylinder body sealing connection of gas injection pipe 4 and vertical cylinder 62, sealing connection can adopt the sealing ring sealed, also can be directly realize sealing with both welded fastening, therefore vertical cylinder 62 drives when welding rod 5 reciprocates, and the inside encapsulated situation that still keeps of gas injection pipe 4 to vertical cylinder 62's piston rod reciprocates and influences lessly to the atmospheric pressure in the gas injection pipe 4.

The upper end surface of the welding rod 5 is a concave arc-shaped curved surface 52, and a metal ball 91 is placed in the arc-shaped curved surface 52.

The frame 1 is provided with a resistance welding machine 7, the resistance welding machine 7 is an alternating current transformer welding machine, a positive electrode wire of the resistance welding machine 7 is arranged on the upper surface of the placing plate 2, and a negative electrode wire of the resistance welding machine 7 is arranged on the welding rod 5.

A metal elastic sheet 71 is fixed in the groove 21 of the placing plate 2, the metal elastic sheet 71 is a copper sheet, the metal elastic sheet 71 slightly tilts in the groove 21, when the shell 92 is placed in the groove 21, the metal elastic sheet 71 and the shell 92 can be stably attached to realize the electrical connection between the metal elastic sheet 71 and the shell 92, and the positive electrode wire of the resistance welding machine 7 is communicated with the metal elastic sheet 71.

A negative electrode wire of the resistance welding machine 7 penetrates into the gas injection pipe 4 and is hermetically connected with a through hole, the through hole can be sealed through a plurality of layers of sealing rings, or the through hole can be sealed through a hot melt adhesive tape, and the like; the negative electrode wire of the resistance welding machine 7 is communicated with the welding rod 5 after entering the gas injection pipe 4, and the welding rod 5 is placed with the metal balls 91 which are conductive to each other.

Obviously, when the welding rod 5 feeds the metal ball 91 into the opening 93, the resistance welding machine 7 is started, and a strong current passes between the wall of the opening 93 and the metal ball 91 to generate heat to realize welding.

The frame 1 is fixed with the horizontal cylinder 61, and the piston rod of horizontal cylinder 61 seals to slide on gas injection pipe 4, and the sealed welding has the pipe box between the cylinder body of horizontal cylinder 61 and the gas injection pipe 4, and the piston rod of horizontal cylinder 61 stretches out and draws back in the pipe box, therefore can not cause the condition of gas leakage in the gas injection pipe 4 to take place when the piston rod of horizontal cylinder 61 gets into gas injection pipe 4 or leaves gas injection pipe 4.

When the piston rod of horizontal cylinder 61 stretches out, separate the fender in welding rod 5 top, aim at places metal ball 91 on welding rod 5, and metal ball 91 is contradicted by horizontal cylinder 61's piston rod, and then metal ball 91 can not take place the shake.

Example 2, a gas injection apparatus and process for a hybrid gas generator using the gas injection apparatus of the hybrid gas generator of example 1. With reference to figures 1-5 of the drawings,

comprises the following steps of (a) carrying out,

step 1, the welding rod 5 of claim 6 is raised, the welded metal ball 91 is put into the upper end of the welding rod 5 from the upper end of the gas injection pipe 4, and the welding rod 5 is retracted downward;

step 2, a piston rod of the transverse cylinder 61 extends out and is pressed against the upper end of the metal ball 91, so that the metal ball 91 is prevented from escaping from the welding rod 5 under the action of air flow;

step 3, placing a shell 92 with an opening 93 on the side surface on the plate 2, aligning the opening 93 of the shell 92 with the through hole 22, and enabling the upper end of the gas injection pipe 4 to be attached to the outer wall of the periphery of the opening 93;

step 4, the piston rod of the upper air cylinder 3 extends out and abuts against the shell 92, so that the side surface of the shell 92 and the sealing ring 41 of the air injection pipe 4 are tightly pressed;

step 5, the gas source 81 is deflated, the gas injection pipe 4 injects compressed inert gas into the shell 92 until the pressure in the shell 92 and the gas injection pipe 4 is stable, and the pressure detector 86 displays the set pressure value;

step 6, retracting a piston rod of the transverse cylinder 61, and lifting the welding rod 5 under the pushing of the vertical cylinder 62 until the metal ball 91 enters the opening 93 of the shell 92, so that the metal ball 91 is attached to the wall of the opening 93;

step 7, starting the resistance welding machine 7, and realizing resistance welding sealing of the outer wall of the metal ball 91 and the inner wall of the opening 93;

and 8, closing the resistance welding machine 7, closing the gas source 81 and exhausting the gas by the gas injection pipe 4.

The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.