Hybrid type mixed integrated device for industrial gas filling

Abstract

The application is suitable for the technical field of gas filling, and provides a mixed integrated device for mixed industrial gas filling, which comprises a goods shelf, a gas cylinder, a support and a gas injection interface, the gas cylinder is placed in the interior of the goods shelf, the support is installed above the goods shelf, the gas injection interface is installed in the interior of the support, and the device further comprises: a locking assembly arranged in the interior of the support and used for keeping the gas cylinder stable on the support; and a gas injection assembly arranged in the interior of the support and used for actively filling the adjusted gas cylinder with gas, wherein the gas injection assembly comprises a gas injection frame slidingly connected to the top of the support, and a limiting frame slidingly connected to the gas injection frame; the application has the beneficial effects that before the device fills the gas cylinder with gas, the limiting frame flips the rocker arms of the plurality of gas injection interfaces connected to the gas cylinder, so that the gas injection interface can ensure a locked state with the gas cylinder during the gas injection process, and the staff's negligence in forgetting to lock the rocker arms is avoided, so that the gas cylinder does not cause a safety hazard to the surroundings during the filling.

Description

Technical Field

[0001] This invention belongs to the field of gas filling technology, and particularly relates to a hybrid integrated device for filling mixed industrial gases. Background Technology

[0002] In the industrial production sector, industrial gas filling is a crucial step, and its efficiency, safety, and accuracy directly impact the continuity and stability of subsequent industrial production. With the expansion of industrial production scale, the demand for batch and automated industrial gas filling is increasing daily.

[0003] For the positioning of gas cylinders, existing positioning devices mostly adopt rigid clamping structures, using clamps to locally tighten and fix the gas cylinder. However, industrial gas cylinders are mostly cylindrical metal canisters, and rigid clamping can easily lead to localized stress concentration on the surface of the gas cylinder. Over time, this can cause wear on the surface of the gas cylinder, and even cause deformation, reducing the internal pressure resistance of the gas cylinder and shortening its service life.

[0004] After the gas injection port is connected to the gas cylinder valve, the locking mechanism must be manually operated to lock the connection. If the operator neglects to lock it properly or the lock is not secure, gas leakage is very likely to occur during the high-pressure gas filling process, and may even cause safety accidents such as explosions and frostbite, seriously threatening the personal safety of the surrounding workers. Summary of the Invention

[0005] The purpose of this invention is to provide a hybrid integrated device for filling mixed industrial gases, which aims to solve the technical problems existing in the prior art mentioned in the background.

[0006] This invention is implemented as follows: a hybrid integrated device for filling mixed industrial gases includes a shelf, a gas tank, a support, and an injection port. The gas tank is placed inside the shelf, the support is installed above the shelf, and the injection port is installed inside the support. The device also includes:

[0007] A locking assembly, located inside the bracket, is used to securely hold the gas cylinder on the bracket.

[0008] An air injection assembly, housed inside a support frame, is used to actively inject and fill an adjusted gas cylinder. The air injection assembly includes an air injection frame slidably connected to the top of the support frame, a limit frame slidably connected to the air injection frame, a second toothed plate fixedly connected to the side wall of the limit frame, a toothed shaft rotatably connected inside the air injection frame meshing with the second toothed plate, a first toothed disc fixedly connected to the end of the toothed shaft away from the air injection frame, a round shaft slidably connected inside the first toothed disc, a second toothed disc fixedly connected to the end of the round shaft away from the first toothed disc, a second spring fixedly connected between the first and second toothed discs, a toothed frame fixedly connected to the support frame, a toothed groove fixedly connected to the toothed frame meshing with the second toothed disc, a sliding groove formed on the toothed frame, a first sliding seat slidably connected inside the sliding groove, and a toothed plate slidably connected to the first sliding seat meshing with the first toothed disc.

[0009] The alignment component, located inside the bracket, is used to adjust the position of the gas cylinder so that the gas cylinder valve faces the bracket.

[0010] As a preferred technical solution of the present invention: a cylinder is installed on the bracket, the telescopic end of the cylinder is fixedly connected to the air injection frame, and a slanted paddle is fixedly connected to the top of the gear frame and the end of the slide groove.

[0011] As another preferred technical solution of the present invention: when the first slide is located at the end of the slide groove near the inclined plate, the toothed plate and the first toothed disc are in a non-meshing state, and the second spring is compressed and in an elastic contraction state.

[0012] As another preferred technical solution of the present invention: a lock head is installed in the injection port of the bracket, a rocker arm that slides with the lock head is rotatably connected to the surface of the air injection interface, and an air injection port is fixedly connected to the surface of the air injection interface.

[0013] As another preferred technical solution of the present invention: the rocker arm is slidably engaged with the limiting frame, and a rubber seat that engages with the rocker arm is installed on the surface of the limiting frame.

[0014] As another preferred technical solution of the present invention: the locking assembly includes a strap fixedly connected to the bracket, a first rotating shaft rotatably connected inside the bracket, the side of the strap away from the bracket being wrapped around the surface of the first rotating shaft, a first gear fixedly connected to the middle of the first rotating shaft, a second rotating shaft rotatably connected inside the bracket, a worm gear meshing with the first gear fixedly connected to the surface of the second rotating shaft, a first toothed plate vertically slidably connected to the bracket, a first spring fixedly connected between the bottom of the first toothed plate and the lower surface of the bracket, and a second gear fixedly connected to the second rotating shaft meshing with the first toothed plate.

[0015] As another preferred technical solution of the present invention: the binding strap is pre-embedded with carbon steel wire for shaping, and the binding strap has a hole in the middle of the side near the first rotating shaft.

[0016] As another preferred technical solution of the present invention: the correction component includes a positioning frame slidably connected to the side wall of the support, a support arm rotatably connected between the side wall of the positioning frame and the side wall of the gas injection frame, a circular hole that slides with the gas tank on the positioning frame, a transmission wheel rotatably connected to the top of the positioning frame and around the circular hole, a toothed ring rotatably connected to the top of the positioning frame and meshing with the transmission wheel, an electric drive toothed disc that meshes with the toothed ring is installed on the positioning frame, and a graphic sensor installed on the gas injection frame is electrically connected to the electric drive toothed disc.

[0017] The beneficial effects of the embodiments of the present invention are as follows:

[0018] Before the gas cylinder is filled with gas, the limiting frame rotates the rocker arms of multiple gas filling interfaces connected to the gas cylinder, ensuring that the gas filling interfaces are locked to the gas cylinder during the filling process. This prevents workers from forgetting to lock the rocker arms due to negligence, thus avoiding safety hazards to the surrounding area during gas filling.

[0019] Before filling, the gas canister is flexibly secured with straps, ensuring that the surface of the gas canister experiences equal stress during positioning. Compared to clamping the gas canister at fixed points, this effectively avoids stress on a single area, preventing wear on the surface of the gas canister due to localized stress. It also effectively prevents deformation of the gas canister caused by clamping, which could reduce its internal pressure resistance and extend its service life. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the overall structure provided in an embodiment of the present invention;

[0021] Figure 2 This is a partial schematic diagram of the gas injection assembly structure provided in an embodiment of the present invention;

[0022] Figure 3 Provided for embodiments of the present invention Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0023] Figure 4 This is a partially enlarged schematic diagram of the locking assembly structure provided in an embodiment of the present invention;

[0024] Figure 5 This is an exploded view of the locking assembly structure provided in an embodiment of the present invention;

[0025] Figure 6 This is an exploded view of the gas injection assembly structure provided in an embodiment of the present invention;

[0026] Figure 7This is a partial exploded view of the gear frame structure provided in an embodiment of the present invention;

[0027] Figure 8 This is a partially enlarged schematic diagram of the gas injection assembly structure provided in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the overall structure of the correction component provided in an embodiment of the present invention;

[0029] Figure 10 This is an exploded view of the correction component structure provided in an embodiment of the present invention;

[0030] Figure 11 This is a cross-sectional view of the correction component structure provided in an embodiment of the present invention.

[0031] In the picture:

[0032] 1. Shelf; 2. Gas cylinder; 3. Support frame; 4. Gas injection port; 5. Locking assembly; 6. Gas injection assembly; 7. Tracking assembly;

[0033] 41. Rocker arm; 42. Lock head; 43. Air inlet;

[0034] 51. Strap; 52. First pivot; 53. First gear; 54. First gear plate; 55. First spring; 56. Second pivot; 57. Worm disc; 58. Second gear;

[0035] 61. Air injection frame; 62. Cylinder; 63. Gear frame; 64. Gear groove; 65. Slide groove; 66. First slide block; 67. Gear plate; 68. Angled paddle; 69. Gear shaft; 610. First gear disc; 611. Round shaft; 612. Second gear disc; 613. Second spring; 614. Limiting frame; 615. Second gear plate;

[0036] 71. Positioning frame; 72. Support arm; 73. Electric drive gear; 74. Drive wheel; 75. Gear ring; 76. Graphic sensor. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0038] It is understood that the terms “first,” “second,” etc., used in this application may be used herein to describe various elements, but unless otherwise stated, these elements are not limited by these terms. These terms are used only to distinguish one element from another.

[0039] like Figures 1 to 8As shown, in one embodiment, a hybrid integrated device for filling mixed industrial gases is proposed, including a shelf 1, a gas tank 2, a support 3, and a gas injection port 4. The gas tank 2 is placed inside the shelf 1, the support 3 is installed above the shelf 1, and the gas injection port 4 is installed inside the support 3. The device also includes:

[0040] Locking component 5, located inside bracket 3, is used to keep gas tank 2 securely on bracket 3;

[0041] The gas injection assembly 6, located inside the bracket 3, is used to actively inject gas into the adjusted gas tank 2. The gas injection assembly 6 includes a gas injection frame 61 slidably connected to the top of the bracket 3. A limit frame 614 is slidably connected to the gas injection frame 61. A second toothed plate 615 is fixedly connected to the side wall of the limit frame 614. A gear shaft 69 rotatably connected inside the gas injection frame 61 meshes with the second toothed plate 615. A first toothed disc 610 is fixedly connected to the end of the gear shaft 69 away from the gas injection frame 61. A slidably connected first toothed disc 610 is slidably connected inside the first toothed disc 610. A round shaft 611 is fixedly connected to a second gear 612 at one end away from the first gear 610. A second spring 613 is fixedly connected between the first gear 610 and the second gear 612. A gear frame 63 is fixedly connected to the bracket 3. A tooth groove 64 that meshes with the second gear 612 is fixedly connected to the gear frame 63. A sliding groove 65 is provided on the gear frame 63. A first slide block 66 is slidably connected inside the sliding groove 65. A toothed plate 67 slidably connected to the first slide block 66 meshes with the first gear 610.

[0042] The alignment component 7 is located inside the bracket 3 and is used to adjust the position of the gas tank 2 so that the valve of the gas tank 2 faces the bracket 3.

[0043] In practical application, the support 3 will descend above the shelf 1 and fix the row of gas canisters 2, so that multiple gas canisters 2 are in close contact with the surface of the support 3. After the gas canisters 2 are fixed on the support 3, the cylinder 62 is started and pushes the gas injection frame 61 to slide above the support 3. During the sliding process, the gas injection frame 61 will move closer to the gas valve of the gas canister 2 and finally connect the gas injection interface 4 inside the gas injection frame 61 with the gas valve of the gas canister 2.

[0044] As the air inlet frame 61 slides laterally above the bracket 3, it drives the gear shaft 69, the first gear plate 610, and the second gear plate 612 to move together. During the lateral movement, the first gear plate 610 drives the first slide block 66 to slide inside the slide groove 65 via the gear plate 67. At this time, because the first gear plate 610 is engaged with the gear plate 67, the first gear plate 610 is limited and cannot rotate. During the lateral movement, the second gear plate 612 rotates due to engagement with the gear groove 64. After the second gear plate 612 rotates, it will cause the second spring 613 to twist and generate torque. The torque of the second spring 613 will apply a rotational force to the first gear plate 610. When the first slide block 66 slides to the end inside the slide groove 65, the inclined plate 6... 8 will squeeze the toothed plate 67, causing it to slide inside the first slide block 66. After sliding, the toothed plate 67 will be misaligned with the surface of the first toothed disc 610, so that the toothed plate 67 and the first toothed disc 610 are no longer meshed. At this time, the first toothed disc 610 is no longer limited. The torque of the second spring 613 is released and drives the first toothed disc 610 to rotate. When the first toothed disc 610 rotates, it drives the limiting frame 614 to slide downward through the meshing of the toothed shaft 69 and the second toothed plate 615. After the limiting frame 614 slides down, it will press down on the rocker arm 41, causing the rocker arm 41 to flip on the gas injection port 4, thereby locking the connection between the gas injection port 4 and the gas tank 2 to prevent loosening or leakage, and to prevent safety hazards to the surrounding personnel during gas injection.

[0045] Before the gas tank 2 is filled with gas, the limiting frame 614 rotates the rocker arms 41 of the multiple gas filling interfaces 4 connected to the gas tank 2, so that the gas filling interfaces 4 can be locked to the gas tank 2 during the gas filling process, so as to prevent the staff from forgetting to lock the rocker arms 41 due to negligence, which could cause safety hazards to the surrounding area when the gas tank 2 is filled.

[0046] like Figure 2 and Figure 7 As shown, in a preferred embodiment of the present invention, a cylinder 62 is mounted on the bracket 3, the telescopic end of the cylinder 62 is fixedly connected to the air injection frame 61, and a beveled paddle 68 is fixedly connected to the top of the gear frame 63 and the end of the slide groove 65.

[0047] like Figure 6 and Figure 7 As shown, in a preferred embodiment of the present invention, when the first slide block 66 is located at the end of the slide groove 65 near the inclined plate 68, the toothed plate 67 and the first toothed disc 610 are in a non-meshing state, and the second spring 613 is compressed and in an elastic contraction state.

[0048] like Figure 6 As shown, in a preferred embodiment of the present invention, a locking head 42 is installed in the injection port of the bracket 3, a rocker arm 41 that slides with the locking head 42 is rotatably connected to the surface of the air injection interface 4, and an air injection port 43 is fixedly connected to the surface of the air injection interface 4.

[0049] In practical application, the lock head 42 is in an expanded state when the rocker arm 41 is not flipped. After the valve of the gas tank 2 is connected to the gas injection port 4, the rocker arm 41 is pressed down and flipped by the limiting frame 614, thereby locking the lock head 42 to the valve of the gas tank 2, so that the gas tank 2 and the gas injection port 4 are in a connected state, and the inner cavity of the gas tank 2 and the gas injection port 4 is isolated from the outside. The gas that needs to be filled into the gas tank 2 is injected into the gas tank 2 through the gas injection port 43.

[0050] like Figure 6 As shown, in a preferred embodiment of the present invention, the rocker arm 41 is slidably engaged with the limiting frame 614, and a rubber seat that engages with the rocker arm 41 is mounted on the surface of the limiting frame 614.

[0051] like Figure 4 and Figure 5 As shown, in a preferred embodiment of the present invention, the locking assembly 5 includes a strap 51 fixedly connected to the bracket 3, a first rotating shaft 52 rotatably connected inside the bracket 3, the side of the strap 51 away from the bracket 3 wrapped around the surface of the first rotating shaft 52, a first gear 53 fixedly connected to the middle of the first rotating shaft 52, a second rotating shaft 56 rotatably connected inside the bracket 3, a worm gear 57 meshing with the first gear 53 fixedly connected to the surface of the second rotating shaft 56, a first toothed plate 54 vertically slidably connected to the bracket 3, a first spring 55 fixedly connected between the bottom of the first toothed plate 54 and the lower surface of the bracket 3, and a second gear 58 fixedly connected to the second rotating shaft 56 meshing with the first toothed plate 54.

[0052] In practical application, when the support 3 moves downward and penetrates into the multiple gas tanks 2, the strap 51 on the support 3 will be wrapped around the outside of the gas tank 2. Then the support 3 continues to move downward, the first toothed plate 54 will abut against the shelf 1 and cause the first spring 55 to elastically contract. During the downward movement of the support 3, the first toothed plate 54 will slide upward relative to the inside of the support 3. During the upward movement of the first toothed plate 54, it will drive the second rotating shaft 56 to rotate together through the meshing with the second gear 58. When the second rotating shaft 56 rotates, it will drive the first rotating shaft 52 to rotate through the meshing of the worm gear 57 and the first gear 53. When the first rotating shaft 52 rotates, it will roll up the strap 51, thereby shortening the length of the strap 51 and tightly wrapping the strap 51 around the outer wall of the gas tank 2. Thus, when the gas tank 2 is in contact with the outer wall of the support 3, it will be clamped by the strap 51 and cannot shake.

[0053] Because the worm gear 57 and the first gear 53 have unidirectional meshing, after the first gear 53 rotates to the point that the strap 51 is slightly stretched, the strap 51 cannot make the worm gear 57 rotate through the first gear 53. Therefore, after the strap 51 is wound up, the first shaft 52 will not rotate in the opposite direction due to the elasticity of the strap 51.

[0054] Before filling, the straps 51 flexibly fix the gas tank 2, ensuring that the surface of the gas tank 2 is subjected to equal force during positioning. Compared with clamping the gas tank 2 at fixed points, this effectively avoids force on a single area, prevents wear on the surface of the gas tank 2 due to localized force, and effectively prevents deformation of the gas tank 2 caused by clamping, which would reduce its internal pressure resistance and improve its service life.

[0055] like Figure 5 As shown, in a preferred embodiment of the present invention, the binding strap 51 has a carbon steel wire for shaping embedded inside, and the binding strap 51 has a hole in the middle of the side near the first rotating shaft 52.

[0056] In practical applications, the carbon steel wires embedded inside the strap 51 are used to shape the strap 51, so that the strap 51 can maintain a horizontal state in both the extended and retracted states, and will not collapse due to gravity.

[0057] like Figures 9 to 11 As shown, in a preferred embodiment of the present invention, the correction assembly 7 includes a positioning frame 71 slidably connected to the side wall of the support 3. A support arm 72 is rotatably connected between the side wall of the positioning frame 71 and the side wall of the air injection frame 61. The positioning frame 71 has a circular hole that slides with the air tank 2. A transmission wheel 74 is rotatably connected to the top of the positioning frame 71 and around the circular hole. A gear ring 75 that meshes with the transmission wheel 74 is rotatably connected to the top of the positioning frame 71. An electric drive gear 73 that meshes with the gear ring 75 is installed on the positioning frame 71. A graphic sensor 76 installed on the air injection frame 61 is electrically connected to the electric drive gear 73.

[0058] In practical application, when the bracket 3 moves down, when the top of the gas tank 2 is horizontal with the gas injection frame 61, the graphic sensor 76 on the gas injection frame 61 will position the valve on the gas tank 2. When the bracket 3 continues to move down, the top of the gas tank 2 will be inserted into the round hole of the positioning frame 71, and the transmission wheel 74 will be in close contact with the surface of the gas tank 2. The graphic sensor 76 will start the electric drive gear 73 by positioning the position of the gas tank 2 valve and drive the gear ring 75 to rotate together. After the gear ring 75 rotates, it will drive multiple transmission wheels 74 to rotate together, so that the gas tank 2 will rotate together under the action of multiple transmission wheels 74, so that the gas tank 2 valve is directly facing the lock head 42, ensuring that the gas injection interface 4 can accurately dock with the gas tank 2 valve when moving towards the gas tank 2.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A hybrid integrated device for filling mixed industrial gases, comprising a shelf (1), a gas tank (2), a support (3), and an injection port (4), wherein the gas tank (2) is placed inside the shelf (1), the support (3) is installed above the shelf (1), and the injection port (4) is installed inside the support (3), characterized in that, Also includes: A locking assembly (5) is provided inside the bracket (3) to keep the gas tank (2) secure on the bracket (3); The gas injection assembly (6), located inside the bracket (3), is used to actively inject gas into the adjusted gas tank (2). The gas injection assembly (6) includes a gas injection frame (61) slidably connected to the top of the bracket (3). A limit frame (614) is slidably connected to the gas injection frame (61). A second toothed plate (615) is fixedly connected to the side wall of the limit frame (614). A toothed shaft (69) rotatably connected inside the gas injection frame (61) meshes with the second toothed plate (615). A first toothed disc (610) is fixedly connected to the end of the toothed shaft (69) away from the gas injection frame (61). A round shaft (…) is slidably connected inside the first toothed disc (610). 611), the end of the round shaft (611) away from the first gear disk (610) is fixedly connected to the second gear disk (612), the first gear disk (610) and the second gear disk (612) are fixedly connected to the second gear disk (613), the bracket (3) is fixedly connected to the gear frame (63), the gear frame (63) is fixedly connected to the gear groove (64) that meshes with the second gear disk (612), the gear frame (63) is provided with a sliding groove (65), the inside of the sliding groove (65) is slidably connected to the first slide seat (66), the toothed plate (67) slidably connected to the first slide seat (66) meshes with the first gear disk (610); The alignment component (7) is located inside the bracket (3) and is used to adjust the position of the gas tank (2) so that the valve of the gas tank (2) faces the bracket (3).

2. The integrated mixing device for filling mixed industrial gases according to claim 1, characterized in that, A cylinder (62) is installed on the bracket (3). The telescopic end of the cylinder (62) is fixedly connected to the air injection frame (61). A beveled paddle (68) is fixedly connected to the top of the gear frame (63) and the end of the slide groove (65).

3. The integrated mixing device for filling mixed industrial gases according to claim 1, characterized in that, When the first slide block (66) is located at the end of the slide groove (65) near the inclined plate (68), the toothed plate (67) and the first toothed disc (610) are in a non-meshing state, and the second spring (613) is compressed and in an elastic contraction state.

4. The integrated mixing device for filling mixed industrial gases according to claim 1, characterized in that, A lock head (42) is installed inside the injection port of the bracket (3). A rocker arm (41) that slides with the lock head (42) is rotatably connected to the surface of the air injection port (4). An air injection port (43) is fixedly connected to the surface of the air injection port (4).

5. The integrated mixing device for filling mixed industrial gases according to claim 4, characterized in that, The rocker arm (41) is slidably engaged with the limiting frame (614), and the surface of the limiting frame (614) is fitted with a rubber seat that engages with the rocker arm (41).

6. The integrated mixing device for filling mixed industrial gases according to claim 1, characterized in that, The locking assembly (5) includes a strap (51) fixedly connected to the bracket (3). A first rotating shaft (52) is rotatably connected inside the bracket (3). The side of the strap (51) away from the bracket (3) is wrapped around the surface of the first rotating shaft (52). A first gear (53) is fixedly connected to the middle of the first rotating shaft (52). A second rotating shaft (56) is rotatably connected inside the bracket (3). A worm gear (57) meshing with the first gear (53) is fixedly connected to the surface of the second rotating shaft (56). A first toothed plate (54) is vertically slidably connected to the bracket (3). A first spring (55) is fixedly connected between the bottom of the first toothed plate (54) and the lower surface of the bracket (3). A second gear (58) fixedly connected to the second rotating shaft (56) meshes with the first toothed plate (54).

7. The integrated mixing device for filling mixed industrial gases according to claim 6, characterized in that, The binding strap (51) has a carbon steel wire embedded inside for shaping, and the binding strap (51) has a hole in the middle of the side near the first rotating shaft (52).

8. The integrated mixing device for filling mixed industrial gases according to claim 1, characterized in that, The correction assembly (7) includes a positioning frame (71) slidably connected to the side wall of the bracket (3). A support arm (72) is rotatably connected between the side wall of the positioning frame (71) and the side wall of the gas injection frame (61). A circular hole is provided on the positioning frame (71) to slide with the gas tank (2). A transmission wheel (74) is rotatably connected to the top of the positioning frame (71) and around the circular hole. A gear ring (75) is rotatably connected to the top of the positioning frame (71) and meshes with the transmission wheel (74). An electric drive gear disk (73) meshes with the gear ring (75) is installed on the positioning frame (71). A graphic sensor (76) installed on the gas injection frame (61) is electrically connected to the electric drive gear disk (73).

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