A quality inspection device adaptable to valves with different numbers of channels

Abstract

The present invention discloses a quality inspection device adaptable to valves with different numbers of channels, belonging to the technical field of valve detection, and comprising a machine platform; a conveying mechanism and an inner diameter detection mechanism are installed on the machine platform; a plurality of mounting brackets are arranged at one end of the machine platform, and an airtightness detection mechanism is installed on the mounting brackets; a plurality of carriers are installed at the output end of the conveying mechanism, and a clamping mechanism for placing valves is installed on the carriers; the clamping mechanism comprises a driving component and a main body component, the main body component is installed on the carrier, and the driving component is installed on the machine platform and the carrier; the inner diameter detection mechanism comprises a pushing component and a detection component, a plurality of driving components are installed on the machine platform, and the detection component is installed at the output end of the driving component. By the above method, the inner diameter detection mechanism and the airtightness detection mechanism can detect the valves according to the number of channels of the valves; thereby realizing the continuous detection of valves with different numbers of channels and further improving the detection efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of valve detection, and particularly to a quality inspection device adaptable to valves with different numbers of channels. Background Art

[0002] During the use of industrial valves, it is necessary to ensure the normal operation of pipelines. Therefore, strict inspections are required during production to ensure that the valves meet the standards. Conventional inspections of valves include airtightness inspection, shell inspection, appearance inspection, and thickness and inner diameter inspection, etc.

[0003] For example, Chinese Patent CN112857706B discloses a pneumatic valve detection device. This device sequentially conveys valves to the lower side of the airtightness detection device through a conveying mechanism, and then starts the sealing detection device and the valve to detect the valve. Subsequently, the detected valves are conveyed to the area to be processed through a blanking mechanism to achieve continuous detection of the valves.

[0004] However, there are valves with multiple passages such as double-pass and triple-pass in the market. It is difficult for this device to detect triple-pass valves. Moreover, when detecting some multi-channel valves, airtightness inspections need to be carried out for various connection states respectively, and it is difficult for this device to achieve detection of various connection states of valves.

[0005] Based on this, the present invention designs a quality inspection device adaptable to valves with different numbers of channels to solve the above problems. Summary of the Invention

[0006] Aiming at the above-mentioned shortcomings of the prior art, the present invention provides a quality inspection device adaptable to valves with different numbers of channels.

[0007] To achieve the above purposes, the present invention is realized through the following technical solutions:

[0008] A quality inspection device adaptable to valves with different numbers of channels includes a machine platform;

[0009] A conveying mechanism and an inner diameter detection mechanism are installed on the machine platform. A plurality of mounting brackets are provided at one end of the machine platform, and an airtightness detection mechanism is installed on the mounting brackets. A plurality of carriers are installed at the output end of the conveying mechanism, and a clamping mechanism for placing valves is installed on the carriers.

[0010] The clamping mechanism includes a driving component and a main body component. The main body component is installed on the carrier, and the driving component is installed on the machine platform and the carrier.

[0011] The inner diameter detection mechanism includes a pushing component and a detection component. A plurality of pushing components are installed on the machine platform, and the detection component is installed at the output end of the pushing component.

[0012] Further, the pushing component includes a linear module, a moving frame, a reduction motor, and a support rod. The linear module is installed on the machine table, a moving frame is fixedly installed on the output end of the linear module, a reduction motor is fixedly installed on the moving frame, and a support rod is fixedly installed on the output end of the reduction motor.

[0013] Further, the detection component includes a limiting rod, a spring, a mounting block, a universal ball, a sensor, and a retracting and extending component. The limiting rod is in limiting sliding connection with the support rod, a mounting block is fixedly installed at the end of the limiting rod, a spring is fixedly installed between the mounting block and the support rod, and a sensor for detecting the relative displacement between the mounting block and the support rod is fixedly installed on the mounting block; the retracting and extending component is installed on the mounting block and the support rod; a universal ball for rolling connection with the inner wall of the communication port is fixedly installed on the mounting block.

[0014] Further, the retracting and extending component includes an electromagnetic component and a magnetic block. The electromagnetic component is fixedly installed on the support rod, and the magnetic block is fixedly installed on the mounting block.

[0015] Further, the airtightness detection mechanism includes a detection component and an opening and closing component. The opening and closing component and multiple groups of detection components are installed on the mounting frame.

[0016] Further, the detection component includes a pushing device, a baffle, and a through hole. The pushing device is fixedly installed on the mounting frame, a baffle is fixedly installed on the output end of the pushing device, and a through hole communicating with the air delivery device is provided on the baffle.

[0017] Further, the opening and closing component includes a first push rod, a mounting plate, and a pushing component. The first push rod is fixedly installed on the mounting frame, a mounting plate is fixedly installed on the output end of the first push rod, and the pushing component is installed on the mounting plate.

[0018] Further, the pushing component includes a second push rod, a connecting rod, a rotating plate, and a pushing frame. The second push rod is fixedly installed on the mounting plate, the output end of the second push rod is rotatably connected to one end of the connecting rod, the other end of the connecting rod is rotatably connected to one end of the rotating plate, the other end of the rotating plate is rotatably installed on the mounting plate, and a pushing frame is fixedly installed at the end of the rotating plate.

[0019] Further, the main body component includes a base, a centering component, a receiving groove, a sliding rod, and a clamping block. The base is fixedly installed on the carrier table, and a receiving groove for receiving the base is provided on the base; the centering component is installed on the base, and there are two centering components which are symmetrically distributed on the centering component; sliding rods are respectively fixedly installed at both ends of the centering component, clamping blocks are fixedly installed on the sliding rods, and the sliding rods are in limiting sliding connection with the base.

[0020] Further, the driving component includes a movable frame, rollers and a slide rail. The slide rail is fixedly installed on the machine table. A movable frame is fixedly installed on the slide bar near one side of the slide rail. One end of the roller is fixedly installed on the movable frame, and the other end of the roller is in rolling connection with the slide rail. Moreover, the bottom of the slide rail is higher than the highest point of the conveying mechanism, and the rotation center of the slide rail coincides with the rotation center of the conveying mechanism. The slide rail is composed of a clamping section and a releasing section.

[0021] The present invention has the following technical effects:

[0022] 1. Through the cooperation of the conveying mechanism, the clamping mechanism and the slide rail, the device can automatically clamp the valve after loading, which is convenient for loading and unloading and improves the detection efficiency. At the same time, the inner diameter detection and airtightness detection of the valve can be carried out according to the number of channels of the valve. Thus, the continuous detection of valves with different numbers of channels is realized, and the detection efficiency is further greatly improved.

[0023] 2. The first push rod drives the mounting plate to move downward, thereby driving the rotating plate and the pushing frame to move downward until the pushing frame clamps the handle. Then, the second push rod is started to operate. The second push rod drives the rotating plate to rotate through the connecting rod, thereby driving the pushing frame to rotate. The pushing frame pushes the handle to rotate, changing the communication state of the communication port, so as to cooperate with the air supply device to detect the airtightness in various communication states. The airtightness detection of valves with different numbers of channels is realized, and the airtightness in various communication situations can be automatically detected.

[0024] 3. Through the cooperation of the rolling balls with the releasing section and the clamping section of the slide rail, the clamping blocks on both sides are driven to move away from or close to each other by the slide bars on both sides and the centering device. In the releasing section, the rolling balls pull the clamping blocks on both sides, making the relative distance between the two sides larger until the clamping blocks do not hinder the movement of the valve, which is convenient for placing the base on the valve into the receiving groove on the base. In the clamping section, the rolling balls push the slide bars and the clamping blocks on both sides through the centering mechanism, clamping the valve body by the clamping blocks on both sides to prevent the valve from moving. Thus, the automatic clamping and releasing of the valve are realized, which is convenient for the continuous detection work. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 Isometric view of a quality inspection device for valves adaptable to different numbers of channels of the present invention Figure 1 ;

[0027] Figure 2Front view of a quality inspection device for valves adaptable to different numbers of channels according to the present invention;

[0028] Figure 3 Partial view of a quality inspection device for valves adaptable to different numbers of channels according to the present invention;

[0029] Figure 4 Isometric view of the valve Figure 1 ;

[0030] Figure 5 Isometric view of the valve Figure 2 ;

[0031] Figure 6 Isometric view of the clamping mechanism;

[0032] Figure 7 Isometric view of a quality inspection device for valves adaptable to different numbers of channels according to the present invention Figure 2 ;

[0033] Figure 8 Isometric view of the airtightness detection mechanism and its connection structure;

[0034] Figure 9 Isometric view of the inner diameter detection mechanism and its connection structure;

[0035] Figure 10 Is Figure 9 Enlarged view of part A in

[0036] The labels in the figure respectively represent:

[0037] 1, machine platform; 2, conveying mechanism; 3, carrier platform; 4, clamping mechanism; 41, base; 42, centering component; 43, receiving groove; 44, sliding rod; 45, clamping block; 46, movable frame; 47, roller; 5, slide rail; 51, clamping section; 52, release section; 6, inner diameter detection mechanism; 61, pushing component; 611, linear module; 612, moving frame; 613, reduction motor; 614, support rod; 62, detection component; 621, limiting rod; 622, spring; 623, mounting block; 624, universal ball; 625, sensor; 626, electromagnetic component; 627, magnetic block; 7, airtightness detection mechanism; 71, detection component; 711, pushing device; 712, baffle; 713, through hole; 714, gas conveying device; 72, opening and closing component; 721, first push rod; 722, mounting plate; 723, second push rod; 724, connecting rod; 725, rotating plate; 726, pushing frame; 8, mounting frame; 9, valve; 91, base; 92, handle; 93, communication port; 94, valve body. Detailed implementation manners

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] The present invention will be further described below with reference to the embodiments.

[0040] As mentioned in the following description, "left", "right", "front", "rear", "up", and "down" are oriented in the perspective direction of the front view.

[0041] Embodiment 1

[0042] Please refer to the attached specification Figures 1-7 , a quality inspection device adaptable to valves with different numbers of channels, comprising a machine table 1;

[0043] A conveying mechanism 2 and an inner diameter detection mechanism 6 are installed on the machine table 1; a plurality of mounting brackets 8 are provided at one end of the machine table 1, and an airtightness detection mechanism 7 is installed on the mounting brackets 8; a plurality of carriers 3 are installed at the output end of the conveying mechanism 2, and a clamping mechanism 4 for placing a valve 9 is installed on the carrier 3;

[0044] The clamping mechanism 4 includes a driving component and a main body component. The main body component is installed on the carrier 3, and the driving component is installed on the machine table 1 and the carrier 3;

[0045] The inner diameter detection mechanism 6 includes a pushing component 61 and a detection component 62. A plurality of pushing components 61 are installed on the machine table 1, and the detection component 62 is installed at the output end of the pushing component 61.

[0046] In this embodiment, when the quality inspection device adaptable to valves with different numbers of channels is working properly and the main body assembly is at the loading and unloading station, the driving assembly is used to release the main body assembly; the valve 9 is placed into the main body assembly, and then the conveying mechanism 2 drives the main body assembly to move through the carrier 3. When the main body assembly moves to the working station, the driving assembly drives the main body assembly to clamp the valve 9; the conveying mechanism 2 drives the valve 9 to move through the carrier 3 and the main body assembly. When the valve 9 moves to the position aligned with the inner diameter detection mechanism 6, according to the number of channels of the valve 9, the pushing assembly 61 that aligns with the channels of the valve 9 is then started to drive the detection assembly 62 to move. After the inner diameter of the valve 9 is detected by the detection assembly 62, the pushing assembly 61 drives the detection assembly 62 away from the valve 9 so that the pushing assembly 61 and the detection assembly 62 do not obstruct the movement of the valve 9; when the valve 9 moves to the position aligned with the airtightness detection mechanism 7, the airtightness of the valve 9 is detected by the airtightness detection mechanism 7; after the detection is completed, the conveying mechanism 2 drives the valve 9 to move back to the loading and unloading station through the carrier 3 and the main body assembly, and the driving assembly drives the main body to make the main body assembly no longer clamp the valve 9; the detected valve 9 is removed, and then the valve 9 to be detected is placed into the main body assembly to continue the detection; thus, the continuous detection of valves 9 with different numbers of channels is realized, greatly improving the detection efficiency.

[0047] Embodiment 2

[0048] As Figures 1-10 shown, as a preferred embodiment of the present invention, the pushing assembly 61 includes a linear module 611, a moving frame 612, a reduction motor 613, and a support rod 614. The linear module 611 is installed on the machine table 1, a moving frame 612 is fixedly installed on the output end of the linear module 611, a reduction motor 613 is fixedly installed on the moving frame 612, and a support rod 614 is fixedly installed on the output end of the reduction motor 613;

[0049] The detection assembly 62 includes a limit rod 621, a spring 622, a mounting block 623, a universal ball 624, a sensor 625, and a retracting and releasing assembly. The limit rod 621 is in limit sliding connection with the support rod 614, a mounting block 623 is fixedly installed at the end of the limit rod 621, a spring 622 is fixedly installed between the mounting block 623 and the support rod 614, and a sensor 625 for detecting the relative displacement between the mounting block 623 and the support rod 614 is fixedly installed on the mounting block 623; the retracting and releasing assembly is installed on the mounting block 623 and the support rod 614; a universal ball 624 for rolling connection with the inner wall of the communication port 93 is fixedly installed on the mounting block 623;

[0050] The retracting and releasing assembly includes an electromagnetic assembly 626 and a magnetic block 627. The electromagnetic assembly 626 is fixedly installed on the support rod 614, and the magnetic block 627 is fixedly installed on the mounting block 623.

[0051] The airtightness detection mechanism 7 includes a detection component 71 and an opening and closing component 72. The opening and closing component 72 and multiple groups of detection components 71 are installed on the mounting rack 8;

[0052] The detection component 71 includes a pushing device 711, a baffle 712, and a through hole 713. The pushing device 711 is fixedly installed on the mounting rack 8. A baffle 712 is fixedly installed on the output end of the pushing device 711. A through hole 713 communicating with the air delivery device 714 is formed in the baffle 712;

[0053] The opening and closing component 72 includes a first push rod 721, a mounting plate 722, and a pushing component. The first push rod 721 is fixedly installed on the mounting rack 8. A mounting plate 722 is fixedly installed on the output end of the first push rod 721. The pushing component is installed on the mounting plate 722;

[0054] The pushing component includes a second push rod 723, a connecting rod 724, a rotating plate 725, and a pushing frame 726. The second push rod 723 is fixedly installed on the mounting plate 722. The output end of the second push rod 723 is rotatably connected to one end of the connecting rod 724. The other end of the connecting rod 724 is rotatably connected to one end of the rotating plate 725. The other end of the rotating plate 725 is rotatably installed on the mounting plate 722. A pushing frame 726 is fixedly installed at the end of the rotating plate 725.

[0055] In this embodiment, when the pushing component 61, the detecting component 62 and the airtightness detecting mechanism 7 are working properly, in the initial state, the distance between the end of the universal ball 624 and the center of the support rod 614 is slightly greater than the inner diameter of the communication port 93; when the electromagnetic component 626 is turned on, the electromagnetic component 626 and the magnet block 627 attract each other magnetically, the magnet block 627 drives the mounting block 623 and the limiting rod 621 to move, the limiting rod 621 moves horizontally under the limiting action of the support rod 614, and the spring 622 is compressed; at this time, the distance between the end of the universal ball 624 and the center of the support rod 614 is less than the inner diameter of the communication port 93; start the linear module 611 to operate, the linear module 611 drives the reduction motor 613 to move horizontally through the moving frame 612, so as to drive the support rod 614 to move horizontally; the support rod 614 drives the limiting rod 621 to insert into the communication port 93, at this time, turn off the electromagnetic component 626, and the spring 622 resets to push the mounting block 623 and the limiting rod 621 to move horizontally until the universal ball 624 abuts against the inner wall of the communication port 93; start the reduction motor 613 to operate, the reduction motor 613 drives the mounting block 623 to rotate through the support rod 614 and the limiting rod 621, so as to drive the universal ball 624 and the sensor 625 to rotate; the sensor 625 detects the position of the end of the universal ball 624 from the center of the support rod 614, so as to detect the inner diameter of the communication port 93; after the communication port 93 on the valve 9 is aligned with the baffle 712, according to the number of channels of the valve 9, start the pushing device 711 aligned with the communication port 93 to operate, the pushing device 711 drives the baffle 712 to move, after the baffle 712 blocks the communication port 93, start the air delivery device 714 to inject gas into the valve body 94 through the through hole 713, and detect the airtightness of the valve body 94 according to the air pressure change; drive the mounting plate 722 to move downward through the first push rod 721, so as to drive the rotating plate 725 and the pushing frame 726 to move downward until the pushing frame 726 clamps the handle 92, start the second push rod 723 to operate, the second push rod 723 drives the rotating plate 725 to rotate through the connecting rod 724, so as to drive the pushing frame 726 to rotate, the pushing frame 726 pushes the handle 92 to rotate, changing the communication state of the communication port 93, so as to cooperate with the air delivery device 714 to detect the airtightness in multiple communication states; realize the airtightness detection of valves with different channel numbers, and be able to automatically detect the airtightness in multiple communication situations, further improving the detection efficiency.

[0056] Embodiment 3

[0057] As Figures 1-6As shown in the figure, as a preferred embodiment of the present invention, the main body assembly includes a base 41, a centering assembly 42, a receiving groove 43, a sliding rod 44, and a clamping block 45. The base 41 is fixedly installed on the carrier 3, and a receiving groove 43 for receiving the base 91 is provided on the base 41; the centering assembly 42 is installed on the base 41, and there are two centering assemblies 42, which are symmetrically distributed on the centering assembly 42; both ends of the centering assembly 42 are fixedly installed with sliding rods 44, and clamping blocks 45 are fixedly installed on the sliding rods 44. The sliding rods 44 are in limiting sliding connection with the base 41;

[0058] The driving assembly includes a movable frame 46, a roller 47, and a slide rail 5. The slide rail 5 is fixedly installed on the machine table 1; a movable frame 46 is fixedly installed on the sliding rod 44 on one side close to the slide rail 5. One end of the roller 47 is fixedly installed on the movable frame 46, and the other end of the roller 47 is in rolling connection with the slide rail 5; and the bottom of the slide rail 5 is higher than the highest point of the conveying mechanism 2, and the rotation center of the slide rail 5 coincides with the rotation center of the conveying mechanism 2; the slide rail 5 is composed of a clamping section 51 and a release section 52.

[0059] In this embodiment, when the clamping mechanism 4, the pushing assembly 61, and the detection assembly 62 are working properly, in the initial state, the roller 47 is in contact with the release section 52 of the slide rail 5, and the sliding rods 44 and the clamping blocks 45 on both sides are far away from each other. When the relative distance between the clamping blocks 45 on both sides is the largest, the clamping blocks 45 do not hinder the movement of the valve 9; the base 91 on the valve 9 is placed in the receiving groove 43 on the base 41, and the conveying mechanism 2 drives the base 41 to move through the carrier 3, thereby driving the movable frame 46 and the roller 47 to move. In the release section 52, the roller 47 pushes the movable frame 46 to move, the movable frame 46 pushes the sliding rod 44 to move, and the sliding rod 44 moves horizontally under the limiting action of the base 41. The centering assembly 42 drives the sliding rods 44 and the clamping blocks 45 on both sides to approach synchronously until the roller 47 moves to contact the clamping section 51 of the slide rail 5. At this time, the clamping blocks 45 on both sides clamp the valve body 94; after the detection is completed, the conveying mechanism 2 drives the base 41 to move through the carrier 3, thereby driving the roller 47 to move to the position in contact with the release section 52 of the slide rail 5. The release section 52 of the slide rail 5 pulls the movable frame 46 through the roller 47, so that the clamping blocks 45 on both sides are far away from each other through the sliding rod 44 and the centering assembly 42. After the sliding rod 44 and the clamping block 45 are reset, the detected valve 9 is removed, thereby realizing the automatic clamping and release of the valve 9, facilitating the continuous detection work, and greatly improving the detection efficiency.

[0060] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A quality inspection device that can adapt to valves with different numbers of channels, comprising a machine (1), characterized in that: The machine platform (1) is equipped with a conveying mechanism (2) and an inner diameter detection mechanism (6); a plurality of mounting frames (8) are provided at one end of the machine platform (1), and the airtightness detection mechanism (7) is mounted on the mounting frame (8); a plurality of carriers (3) are installed at the output end of the conveying mechanism (2), and a clamping mechanism (4) for placing a valve (9) is installed on the carrier (3); The clamping mechanism (4) comprises a driving component and a main body component, the main body component is mounted on the carrier (3), and the driving component is mounted on the machine platform (1) and the carrier (3); The inner diameter detection mechanism (6) comprises a pushing component (61) and a detection component (62); a plurality of pushing components (61) are mounted on the machine platform (1); and the detection component (62) is mounted on the output end of the pushing component (61); The main body component comprises a base (41), a centering component (42), a receiving groove (43), a sliding rod (44) and a clamping block (45); the base (41) is fixedly mounted on the carrier (3); the base (41) is provided with a receiving groove (43) for accommodating the base (91); the centering component (42) is mounted on the base (41); two centering components (42) are provided, and the two centering components (42) are symmetrically distributed on the centering component (42); sliding rods (44) are fixedly mounted at both ends of the centering component (42); a clamping block (45) is fixedly mounted on the sliding rod (44); the sliding rod (44) is connected to the base (41) in a limited sliding manner; The driving assembly comprises a movable frame (46), a roller (47) and a slide rail (5), wherein the slide rail (5) is fixedly mounted on the machine platform (1); the movable frame (46) is fixedly mounted on the slide rod (44) close to one side of the slide rail (5); one end of the roller (47) is fixedly mounted on the movable frame (46), and the other end of the roller (47) is rollingly connected to the slide rail (5); the bottom of the slide rail (5) is higher than the highest point of the conveying mechanism (2), and the rotation center of the slide rail (5) coincides with the rotation center of the conveying mechanism (2); the slide rail (5) is composed of a clamping section (51) and a releasing section (52); The pushing assembly (61) comprises a linear module (611), a moving frame (612), a reduction motor (613) and a support rod (614); the linear module (611) is mounted on the machine platform (1); the moving frame (612) is fixedly mounted on the output end of the linear module (611); the reduction motor (613) is fixedly mounted on the moving frame (612); and the support rod (614) is fixedly mounted on the output end of the reduction motor (613); The detection assembly (62) comprises a limit rod (621), a spring (622), a mounting block (623), a universal ball (624), a sensor (625) and a retractable assembly. The limit rod (621) is connected to the support rod (614) in a limited sliding manner. The end of the limit rod (621) is fixedly mounted with a mounting block (623). A spring (622) is fixedly mounted between the mounting block (623) and the support rod (614). A sensor (625) for detecting the relative displacement between the mounting block (623) and the support rod (614) is fixedly mounted on the mounting block (623). The retractable assembly is mounted on the mounting block (623) and the support rod (614). The universal ball (624) for rolling connection with the inner wall of the connecting port (93) is fixedly mounted on the mounting block (623). The retractable assembly comprises an electromagnetic assembly (626) and a magnetic block (627); the electromagnetic assembly (626) is fixedly mounted on the support rod (614), and the magnetic block (627) is fixedly mounted on the mounting block (623); The airtightness detection mechanism (7) comprises a detection component (71) and an opening and closing component (72), and the opening and closing component (72) and the plurality of detection components (71) are mounted on a mounting frame (8); The detection assembly (71) comprises a pushing device (711), a baffle (712) and a through hole (713); the pushing device (711) is fixedly mounted on the mounting frame (8); a baffle (712) is fixedly mounted on the output end of the pushing device (711); and a through hole (713) communicating with the gas delivery device (714) is formed on the baffle (712); The opening and closing assembly (72) comprises a first push rod (721), a mounting plate (722) and a pushing assembly, wherein the first push rod (721) is fixedly mounted on the mounting frame (8), a mounting plate (722) is fixedly mounted on the output end of the first push rod (721), and the pushing assembly is mounted on the mounting plate (722); The pushing assembly comprises a second push rod (723), a connecting rod (724), a rotating plate (725) and a pushing frame (726); the second push rod (723) is fixedly mounted on the mounting plate (722); the output end of the second push rod (723) is rotatably connected to one end of the connecting rod (724); the other end of the connecting rod (724) is rotatably connected to one end of the rotating plate (725); the other end of the rotating plate (725) is rotatably mounted on the mounting plate (722); and the pushing frame (726) is fixedly mounted on the end of the rotating plate (725).

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