Airtightness detection device for a domain controller

Abstract

This invention relates to the field of domain controllers, specifically to an airtightness detection device for a domain controller. The device includes a domain controller housing, with a first end cap and a second end cap respectively installed at both ends of the housing. A base plate is installed at the bottom of the housing. Two fixing holes are provided on each side of the housing along its width. A slide is provided on the underside of the base plate, and a base slidably connected to the slide is provided on the underside of the slide. Four positioning rods are evenly installed on the upper surface of the slide. A limiting ring is provided below the fixing holes. A driving component for moving the domain controller housing is installed on one edge of the upper surface of the base. A detection component for detecting the seal between the domain controller housing and the first and second end caps is installed on the side of the upper surface of the base away from the driving component. This invention has the following advantages: it avoids the second end cap being fully subjected to the extrusion force generated by the second cylinder, preventing the second end cap from being deformed and damaged by extrusion.

Description

Technical Field

[0001] This invention is an airtightness detection device for a domain controller, belonging to the field of domain controllers. Background Technology

[0002] A domain controller integrates the application software functions of one or more functional domains of a vehicle into a single controller, facilitating collaborative control and avoiding extensive information exchange via the bus. End caps are installed at both ends of the domain controller, with sealing rings between the end caps and the domain controller housing. After assembly, an airtightness test is required. One common method for this test is air extraction. The air extraction mechanism covers the end cap containing the wiring ports, then compresses the other end cap on the domain controller housing. This compresses the sealing gasket between the end cap and the housing, improving the seal. However, when a cylinder or electric push rod compresses the end cap, it bears significant pressure. Given the thinness of the end cap, it is prone to deformation, potentially damaging the domain controller during the airtightness test and increasing its failure rate. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide an airtightness detection device for a domain controller to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: an airtightness detection device for a domain controller, comprising a domain controller housing, with a first end cover and a second end cover respectively installed at both ends of the domain controller housing. Sealing strips are provided between the first end cover and the domain controller housing, and between the second end cover and the domain controller housing. A wiring port is installed on the side of the second end cover facing away from the first end cover. A base plate is installed at the bottom of the domain controller housing. Two fixing holes are provided on both sides of the domain controller housing along its width direction. The fixing holes are located on the upper surface of the base plate. A slide is provided on the lower side of the base plate. A base slidably connected to the slide is provided on the lower side of the slide. Four positioning rods are evenly installed on the upper surface of the slide. The upper ends of the positioning rods are inserted into the fixing holes. A limiting ring is provided on the lower side of the fixing holes. The limiting ring is sleeved on the positioning rods and connected and fixed to them. A driving component for moving the domain controller housing is installed at one edge of the upper surface of the base. A detection component for detecting the airtightness between the domain controller housing and the first and second end covers is installed on the side of the upper surface of the base away from the driving component.

[0005] Specifically, the driving component includes a support, a vertically arranged support is installed on one edge of the upper surface of the base, two horizontally arranged second cylinders are installed on one side of the support, a first support plate is installed on the upper surface of the slide near the edge of the support, the movable end of the second cylinder passes through the support and is connected to the first support plate, and a pressure plate for pressing the first end cover is installed on the side of the first support plate away from the second cylinders through an adjusting component.

[0006] Specifically, the adjusting component includes a screw, and a second support plate is provided on the side of the first support plate away from the support. The second support plate is installed on the upper surface of the slide. The pressure plate is disposed between the first support plate and the second support plate. Two symmetrically arranged transverse holes are opened on one side of the pressure plate. A screw is inserted into each of the two transverse holes. The two ends of the screw are respectively connected and fixed to the first support plate and the second support plate. Nuts for limiting the relative position of the screw and the pressure plate are provided on both sides of the transverse holes along the length direction of the screw. The nuts are threaded onto the screw.

[0007] Specifically, a rib is fixedly connected to the middle of the side of the pressure plate opposite to the first end cover. The rib is arranged vertically and is perpendicular to the pressure plate.

[0008] Specifically, the detection component includes a cover. The second end cover is located on the side of the outer shell of the domain controller. The side of the cover facing the second end cover is open. A sealing frame that fits with the second end cover is glued to the open end of the cover. A circular opening is located in the middle of the side of the cover away from the second end cover. An air cylinder is arranged concentrically with the circular opening on the outer side of the circular opening. One end of the air cylinder is connected to the cover via a connector. A piston is slidably installed inside the air cylinder. A vertical plate is installed at the end of the air cylinder away from the cover. The lower end of the vertical plate is connected and fixed to the base. A first cylinder is installed on the side of the vertical plate away from the air cylinder. The movable end of the first cylinder passes through the vertical plate and is connected and fixed to the piston. A through hole with an inner diameter larger than the movable end of the first cylinder is opened at the upper part of one side of the vertical plate. The movable end of the first cylinder passes through the through hole. A vent hole is installed at the lower part of the outer surface of the end of the air cylinder near the vertical plate. A pressure gauge is installed on the upper surface of the cover.

[0009] Specifically, the connector includes a connecting ring. The end of the air cylinder near the cover is fitted with a connecting ring that is fixed to the air cylinder. A convex ring is provided between the connecting ring and the cover. The convex ring is fixed to the cover. The convex ring is concentrically arranged with the circular opening. The side of the convex ring facing the connecting ring has multiple screw holes at equal intervals in a ring. The side of the connecting ring facing the convex ring has multiple small holes at equal intervals in a ring that mate with the screw holes. A connecting screw is inserted into the small hole. One end of the connecting screw is threaded into the screw hole. One end of the air cylinder is inserted into the circular opening. The end of the air cylinder near the circular opening is fitted with a sealing sleeve that contacts the inner wall of the circular opening.

[0010] Specifically, a conical head is fixedly connected to the upper end of the positioning rod. The diameter of the conical head gradually decreases from bottom to top. The conical head and the positioning rod are integrally formed. The distance between the conical head and the upper surface of the limiting ring is the same as the depth of the fixing hole.

[0011] Specifically, two connector strips are symmetrically installed on the lower surface of the slide block, and two connector slots that cooperate with the connector strips are opened on the upper surface of the base. The two connector strips are respectively inserted into the two connector slots.

[0012] Specifically, the base has side plates fixed to both parallel sides. The upper surface of the side plates is evenly provided with multiple mounting holes for mounting bolts. The bottom of the insertion groove is provided with multiple slag discharge holes at equal intervals. The slag discharge holes are arranged along the width direction of the insertion groove. The lower surface of the base has two pads fixed symmetrically.

[0013] Specifically, a collection tray is provided between the two pads. The upper end of the collection tray is open. The slag discharge hole is located directly above the collection tray. An overlapping strip is connected and fixed to the side of the collection tray facing the pad. An overlapping groove is provided on the side of the pad facing the collection tray. The overlapping strip is inserted into the overlapping groove.

[0014] The beneficial effects of this invention are:

[0015] 1. Install a tapered head on the upper end of the positioning rod, so that the tapered head is first inserted into the fixing hole, and then guided by the tapered head, the upper end of the positioning rod is easily inserted into the fixing hole, thereby improving the efficiency of the positioning rod and the fixing hole connection.

[0016] 2. After the four positioning rods are inserted into the four fixing holes respectively, the relative position of the positioning rods and the base plate is restricted by the limit ring. At this time, the relative position of the domain controller housing and the slide is restricted, so as to quickly restrict the position of the domain controller housing.

[0017] 3. Adjust the position of the pressure plate along the screw so that the pressure plate contacts the first end cover. Then, use the nut on the screw to limit the relative position of the screw and the pressure plate, so as to adjust the relative position of the pressure plate and the first end cover as needed, so that the pressure plate is always in contact with the first end cover.

[0018] 4. Control the extension of the second cylinder, the pneumatic slide of the second cylinder moves, the slide drives the domain controller housing to move, so that the second end cover fits tightly with the sealing frame. At this time, the holding force generated by the second cylinder acts on the structure formed by the domain controller housing, the first end cover and the second end cover through the pressure plate, the slide and the positioning rod, etc., to avoid the second end cover bearing the extrusion force generated by the second cylinder, and to prevent the second end cover from being deformed and damaged by extrusion.

[0019] 5. After the sealing frame and the second end cover are tightly fitted, control the first cylinder to contract. The first cylinder drives the piston to slide inside the air cylinder, thereby reducing the air pressure in the space formed by the second end cover and the cover. At this time, the air in the space formed by the first end cover, the domain controller housing, and the second end cover will flow into the cover through the wiring port. Continue to control the first cylinder to contract until the air in the domain controller housing completely enters the cover. At this time, the reading on the pressure gauge is stable. If the reading on the pressure gauge is always unstable, it indicates that the airtightness between the first end cover, the second end cover, and the domain controller housing is insufficient, thus achieving the purpose of domain controller airtightness detection.

[0020] 6. When connecting the air cylinder and the cover using connecting screws, pass one end of the connecting screw through the small hole and screw it into the screw hole to locally increase the thickness of the part of the cover where the connecting screw is installed.

[0021] 7. Install two pads at the bottom of the base. With the support of the pads, there is a gap between the base and the support carrier. As the connector moves in the connector slot, the debris in the connector slot will be pushed out from the slag discharge hole by the connector. By installing a collection tray between the two pads, the fallen debris will be collected in the collection tray, thus achieving the purpose of centralized collection of debris. Attached Figure Description

[0022] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the airtightness detection device for a domain controller according to the present invention;

[0024] Figure 2 This is another perspective view of the airtightness detection device for a domain controller according to the present invention;

[0025] Figure 3 This is an assembly diagram of the first end cover, the second end cover, the base plate, and the domain controller housing in the airtightness detection device for a domain controller according to the present invention.

[0026] Figure 4 This is a schematic diagram of the assembly of the piston, connecting ring, air cylinder, vertical plate and first cylinder in the airtightness detection device of the domain controller of the present invention.

[0027] Figure 5 This is a schematic diagram of the assembly of a pressure gauge, sealing frame, and cover in an airtightness detection device for a domain controller according to the present invention.

[0028] Figure 6 This is a schematic diagram of the assembly of a pressure gauge, sealing frame, and cover in an airtightness detection device for a domain controller according to the present invention.

[0029] Figure 7 This is an assembly diagram of the pressure plate, screw, positioning rod and slide in the airtightness detection device of a domain controller according to the present invention;

[0030] Figure 8 This is a schematic diagram of the assembly of the ribs and pressure plate in the airtightness detection device of a domain controller according to the present invention;

[0031] Figure 9 This is an assembly diagram of the side plate, pad, and base in the airtightness detection device for a domain controller according to the present invention.

[0032] Figure 10 This is a schematic diagram of the assembly of the overlap strip and the collection tray in the airtightness detection device of a domain controller according to the present invention.

[0033] In the diagram: 1. Domain controller housing, 2. Pressure gauge, 3. Cover, 4. Convex ring, 5. Connecting ring, 6. Air cylinder, 7. First cylinder, 8. Vertical plate, 9. Base, 10. Insertion slot, 11. Pad, 12. Side plate, 13. Connecting screw, 14. Mounting hole, 15. Base plate, 16. Positioning rod, 17. Limiting ring, 18. Slide, 19. Conical head, 20. First support plate, 21. Second cylinder, 22. Support, 23. Second support plate, 24. First end cap, 25. Nut, 26. Rib, 27. Pressure plate, 28. Collection tray, 29. Second end cap, 30. Wiring port, 31. Fixing hole, 32. Piston, 33. Sealing frame, 34. Insertion strip, 35. Screw, 36. Horizontal hole, 37. Slag discharge hole, 38. Overlap groove, 39. Overlap strip. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] Please see Figures 1-3 The present invention provides a technical solution: an airtightness detection device for a domain controller, comprising a domain controller housing 1, with a first end cover 24 and a second end cover 29 respectively installed at both ends of the domain controller housing 1. Sealing strips are provided between the first end cover 24 and the domain controller housing 1, and between the second end cover 29 and the domain controller housing 1. A wiring port 30 is installed on the side of the second end cover 29 opposite to the first end cover 24. A mounting plate 15 is installed at the bottom of the domain controller housing 1. Two fixing holes 31 are provided on both sides of the domain controller housing 1 along its width direction. The fixing holes 31 are opened on the upper surface of the mounting plate 15, so that screws pass through the fixing holes 31 and are installed at the required position, thereby restricting the position of the domain controller housing 1.

[0036] See Figure 1 , Figure 2 and Figure 7The base plate 15 has a slide 18 on its lower side and a base 9 on its lower side that is slidably connected to the slide 18. Two plug strips 34 are symmetrically installed on the lower surface of the slide 18. Two plug grooves 10 that cooperate with the plug strips 34 are opened on the upper surface of the base 9, so that the two plug strips 34 are respectively inserted into the two plug grooves 10, thereby realizing the plugging of the slide 18 and the base 9.

[0037] See Figure 1 , Figure 2 , Figure 3 and Figure 7 Four positioning rods 16 are evenly installed on the upper surface of the slide block 18. The upper ends of the positioning rods 16 are inserted into the fixing holes 31. A limiting ring 17 is provided on the lower side of the fixing hole 31. The limiting ring 17 is sleeved on the positioning rods 16 and connected and fixed to the positioning rods 16. A conical head 19 is connected and fixed to the upper end of the positioning rod 16. The diameter of the conical head 19 gradually decreases from bottom to top. The conical head 19 and the positioning rod 16 are integrally formed. The distance between the conical head 19 and the upper surface of the limiting ring 17 is the same as the depth of the fixing hole 31. The conical head 19 is first inserted into the fixing hole 31. Then, guided by the conical head 19, the upper end of the positioning rod 16 is smoothly inserted into the fixing hole 31, which improves the efficiency of the insertion of the positioning rod 16 into the fixing hole 31. After the four positioning rods 16 are respectively inserted into the four fixing holes 31, the relative position of the positioning rods 16 and the mounting plate 15 is restricted by the limiting ring 17. At this time, the relative position of the domain controller housing 1 and the slide 18 is restricted, realizing the rapid restriction of the position of the domain controller housing 1.

[0038] See Figure 1 , Figure 2 , Figure 7 and Figure 8A vertically arranged support 22 is installed on one edge of the upper surface of the base 9. Two horizontally arranged second cylinders 21 are installed on one side of the support 22. A first support plate 20 is installed on the upper surface of the slide 18 near the edge of the support 22. The movable end of the second cylinder 21 passes through the support 22 and is connected to the first support plate 20. A second support plate 23 is provided on the side of the first support plate 20 away from the support 22. The second support plate 23 is installed on the upper surface of the slide 18. A pressure plate 27 is located between the first support plate 20 and the second support plate 23. Two symmetrically arranged transverse holes 36 are opened on one side of the pressure plate 27. A screw 35 is inserted into each of the two transverse holes 36. The two ends of the screw 35 are respectively connected and fixed to the first support plate 20 and the second support plate 23. Nuts 25 are provided on both sides of the transverse holes 36 along the length of the screw 35 to limit the relative position of the screw 35 and the pressure plate 27. The nuts 25 are threaded onto the screw 35. The middle part of the side of the pressure plate 27 away from the first end cover 24. A rib 26 is fixedly connected and arranged vertically. The rib 26 is perpendicular to the pressure plate 27. The position of the pressure plate 27 is adjusted along the screw 35 so that the pressure plate 27 contacts the first end cover 24. Then, the nut 25 on the screw 35 restricts the relative position of the screw 35 and the pressure plate 27, so that the relative position of the pressure plate 27 and the first end cover 24 can be adjusted as needed, so that the pressure plate 27 is always in contact with the first end cover 24. The second cylinder 21 is controlled to extend, and the pneumatic slide 18 of the second cylinder 21 moves. The slide 18 drives the domain controller housing 1 to move, so that the second end cover 29 is tightly fitted with the sealing frame 33. At this time, the holding force generated by the second cylinder 21 acts on the structure formed by the domain controller housing 1, the first end cover 24 and the second end cover 29 through the pressure plate 27, the slide 18 and the positioning rod 16, etc., to prevent the second end cover 29 from being fully subjected to the squeezing force generated by the second cylinder 21 and to prevent the second end cover 29 from being squeezed and deformed and damaged.

[0039] See Figure 1 , Figure 4 , Figure 5 and Figure 6The second end cover 29 has a cover 3 on the side facing away from the domain controller housing 1. The side of the cover 3 facing the second end cover 29 is open. A sealing frame 33 that fits the second end cover 29 is glued to the open end of the cover 3. A circular opening is opened in the middle of the side of the cover 3 facing away from the second end cover 29. An air cylinder 6 is arranged concentrically with the circular opening on the outside of the circular opening. A connecting ring 5 is fitted onto the end of the air cylinder 6 near the cover 3 and is fixed to the air cylinder 6. A protruding ring 4 is provided between the connecting ring 5 and the cover 3. The protruding ring 4 is fixed to the cover 3 and is arranged concentrically with the circular opening. The side of the connecting ring 4 facing the connecting ring 5 has multiple screw holes equidistantly arranged in a ring. The side of the connecting ring 5 facing the convex ring 4 has multiple small holes equidistantly arranged in a ring to mate with the screw holes. A connecting screw 13 is inserted into the small hole. One end of the connecting screw 13 is threaded into the screw hole. One end of the air cylinder 6 is inserted into the round opening. The end of the air cylinder 6 near the round opening is fitted with a sealing sleeve that contacts the inner wall of the round opening. When connecting the air cylinder 6 and the cover 3 with the connecting screw 13, one end of the connecting screw 13 is passed through the small hole and screwed into the screw hole, thereby locally increasing the thickness of the part of the cover 3 where the connecting screw 13 is installed.

[0040] See Figures 1-6 A piston 32 is slidably installed inside the air cylinder 6. A vertical plate 8 is installed at the end of the air cylinder 6 away from the cover 3. The lower end of the vertical plate 8 is connected and fixed to the base 9. A first cylinder 7 is installed on the side of the vertical plate 8 away from the air cylinder 6. The movable end of the first cylinder 7 passes through the vertical plate 8 and is connected and fixed to the piston 32. A through hole with an inner diameter larger than the movable end of the first cylinder 7 is opened at the upper part of one side of the vertical plate 8. The movable end of the first cylinder 7 passes through the through hole. A vent hole is installed at the lower part of the outer surface of the end of the air cylinder 6 near the vertical plate 8. A pressure gauge 2 is installed on the upper surface of the cover 3. After the sealing frame 33 is tightly fitted with the second end cap 29, it controls the retraction of the first cylinder 7. The first cylinder 7 drives the piston 32 to slide inside the air cylinder 6, thereby reducing the air pressure in the space formed by the second end cap 29 and the cover 3. At this time, the air in the space formed by the first end cap 24, the domain controller housing 1 and the second end cap 29 will flow into the cover 3 through the wiring port 30, continuously controlling the first cylinder 7 to contract until the air in the domain controller housing 1 completely enters the cover 3. At this time, the reading on the pressure gauge 2 is stable. When the reading on the pressure gauge 2 is always unstable, it indicates that the airtightness between the first end cap 24, the second end cap 29 and the domain controller housing 1 is insufficient, thus achieving the purpose of domain controller airtightness detection.

[0041] See Figure 1 , Figure 2 , Figure 9 and Figure 10The base 9 has two parallel sides with side plates 12 fixedly connected to them. Multiple mounting holes 14 for bolts are evenly distributed on the upper surface of the side plates 12. Multiple slag discharge holes 37 are equidistantly distributed at the bottom of the insertion groove 10, arranged along the width of the insertion groove 10. Two pads 11 are symmetrically fixed to the lower surface of the base 9, with a collection tray 28 between them. The upper end of the collection tray 28 is open, and the slag discharge holes 37 are located directly above it. An overlapping strip 39 is fixedly connected to the side of the collection tray 28 facing the pads 11. The side of the pad 11 facing the collection tray 28 has an overlapping groove 38, and the overlapping strip 39 is inserted into the overlapping groove 38. Two pads 11 are installed at the bottom of the base 9. With the support of the pads 11, there is a gap between the base 9 and the support carrier. As the insertion strip 34 moves in the insertion groove 10, the debris in the insertion groove 10 will be pushed out from the slag discharge hole 37 by the insertion strip 34. By installing the collection tray 28 between the two pads 11, the fallen debris will be collected in the collection tray 28, thus achieving the purpose of centralized collection of debris.

[0042] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A device for detecting the tightness of a domain controller comprising a domain controller housing (1), characterized in that: The two ends of the domain controller shell (1) are respectively provided with a first end cover (24) and a second end cover (29), the first end cover (24) and the second end cover (29) are provided with sealing strips between the first end cover (24) and the domain controller shell (1) and between the second end cover (29) and the domain controller shell (1), one side of the second end cover (29) away from the first end cover (24) is provided with a wiring port (30), the bottom of the domain controller shell (1) is provided with a bottom plate (15), the two sides of the domain controller shell (1) along the width direction are both provided with two fixing holes (31), the fixing holes (31) are arranged on the upper surface of the bottom plate (15), the lower side of the bottom plate (15) is provided with a sliding seat (18), the lower side of the sliding seat (18) is provided with a base (9) which is slidingly connected with the sliding seat (18), the upper surface of the sliding seat (18) is uniformly provided with four positioning rods (16), the upper ends of the positioning rods (16) are inserted into the fixing holes (31), the lower side of the fixing hole (31) is provided with a limiting ring (17), the limiting ring (17) is sleeved on the positioning rod (16) and is connected and fixed with the positioning rod (16), one side edge of the upper surface of the base (9) is provided with a driving member for driving the movement of the domain controller shell (1), the side of the upper surface of the base (9) away from the driving member is provided with a detection member for detecting the sealing performance between the domain controller shell (1) and the first end cover (24) and the second end cover (29).

2. The air tightness detection device of a domain controller according to claim 1, characterized in that: The driving member comprises a support (22), the side edge of the upper surface of the base (9) is provided with a vertical support (22), one side of the support (22) is provided with two horizontal second air cylinders (21), one side edge of the upper surface of the sliding seat (18) close to the support (22) is provided with a first supporting plate (20), the movable ends of the second air cylinders (21) penetrate through the support (22) and are connected with the first supporting plate (20), one side of the first supporting plate (20) away from the second air cylinder (21) is provided with a pressing plate (27) for pressing the first end cover (24) through an adjusting member.

3. The air tightness detection device of a domain controller according to claim 2, characterized in that: The adjusting member comprises a screw rod (35), one side of the first supporting plate (20) away from the support (22) is provided with a second supporting plate (23), the second supporting plate (23) is arranged on the upper surface of the sliding seat (18), the pressing plate (27) is arranged between the first supporting plate (20) and the second supporting plate (23), one side of the pressing plate (27) is provided with two symmetrically arranged transverse holes (36), two screw rods (35) are inserted into the two transverse holes (36), the two ends of the screw rod (35) are connected and fixed with the first supporting plate (20) and the second supporting plate (23), the two sides of the transverse hole (36) along the length direction of the screw rod (35) are both provided with a nut (25) for limiting the relative position of the screw rod (35) and the pressing plate (27), the nut (25) is threadedly connected on the screw rod (35).

4. The air tightness detection device of a domain controller according to claim 2, characterized in that: One side of the pressing plate (27) away from the first end cover (24) is connected and fixed with a rib (26) at the middle position, the rib (26) is vertically arranged, and the rib (26) is arranged perpendicular to the pressing plate (27).

5. The air tightness detection device of a domain controller according to claim 1, wherein: The detection piece includes a cover (3), one side of the second end cover (29) away from the area controller shell (1) is provided with a cover (3), one side of the cover (3) facing the second end cover (29) is open, the open end of the cover (3) is pasted with a sealing frame (33) matched with the second end cover (29) by glue, a circular port is arranged in the middle position of the other side of the cover (3) away from the second end cover (29), an air cylinder (6) is arranged concentrically outside the circular port, one end of the air cylinder (6) is connected with the cover (3) through a connecting piece, a piston (32) is slidably installed in the air cylinder (6), a vertical plate (8) is installed at the end of the air cylinder (6) away from the cover (3), the lower end of the vertical plate (8) is connected and fixed with a base (9), a first air cylinder (7) is installed on the side of the vertical plate (8) away from the air cylinder (6), the movable end of the first air cylinder (7) penetrates through the vertical plate (8) and is connected and fixed with the piston (32), a through hole with an inner diameter larger than the movable end of the first air cylinder (7) is arranged on the vertical plate (8), the movable end of the first air cylinder (7) penetrates through the through hole, a vent hole is installed on the outer surface of the end of the air cylinder (6) close to the vertical plate (8), and a pressure gauge (2) is installed on the upper surface of the cover (3).

6. The air tightness detection device of a domain controller according to claim 5, wherein: The connecting piece includes a connecting ring (5), the end of the air cylinder (6) close to the cover (3) is sleeved with a connecting ring (5) connected and fixed with the air cylinder (6), a convex ring (4) is arranged between the connecting ring (5) and the cover (3), the convex ring (4) is connected and fixed with the cover (3), the convex ring (4) is arranged concentrically with the circular port, a plurality of screw holes are arranged on the side of the convex ring (4) facing the connecting ring (5) in a ring shape and at equal intervals, a plurality of small holes matched with the screw holes are arranged on the side of the connecting ring (5) facing the convex ring (4) in a ring shape and at equal intervals, connecting screws (13) are inserted into the small holes, one end of the connecting screw (13) is threadedly connected in the screw hole, the end of the air cylinder (6) close to the circular port is inserted into the circular port, and a sealing sleeve is sleeved with the inner wall of the circular port.

7. The air tightness detection device of a domain controller according to claim 1, characterized in that: The upper end of the positioning rod (16) is connected and fixed with a conical head (19), the diameter of the conical head (19) gradually decreases from bottom to top, the conical head (19) and the positioning rod (16) are an integral structure, and the spacing between the conical head (19) and the upper surface of the limiting ring (17) is the same as the depth of the fixing hole (31).

8. The air tightness detection device of a domain controller according to claim 1, wherein: The lower surface of the sliding seat (18) is symmetrically provided with two insertion strips (34), and the upper surface of the base (9) is provided with two insertion grooves (10) matched with the insertion strips (34).

9. The air tightness detection device of a domain controller according to claim 8, characterized in that: The base (9) has two parallel sides with side plates (12) fixedly connected to each other. The side plates (12) have multiple mounting holes (14) for mounting bolts evenly opened on the upper surface. The bottom of the insertion groove (10) has multiple slag discharge holes (37) equidistantly opened. The slag discharge holes (37) are arranged along the width direction of the insertion groove (10). The lower surface of the base (9) has two pads (11) symmetrically fixed.

10. The air tightness detection device of a domain controller according to claim 9, wherein: A collection tray (28) is provided between the two pads (11). The upper end of the collection tray (28) is open. The slag discharge hole (37) is located directly above the collection tray (28). An overlapping strip (39) is connected and fixed to the side of the collection tray (28) facing the pad (11). An overlapping groove (38) is provided on the side of the pad (11) facing the collection tray (28). The overlapping strip (39) is inserted into the overlapping groove (38).

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