CN219573366U - Joint air tightness detection device - Google Patents

Abstract

The utility model relates to a joint air tightness detection device which is suitable for air tightness detection of a joint with two mutually communicated interfaces, and comprises a double-turntable structure, a test frame and an interface plugging mechanism, wherein the double-turntable structure comprises a rotatable large turntable and a fixed small turntable, the large turntable is positioned below the small turntable, and a plurality of joint placing stations are uniformly distributed on the part of the large turntable, which exceeds the small turntable; the test frame is provided with a pressing mechanism for pressing the joint, the joint plugging mechanism comprises more than one joint plugging component, and the plugging end of the joint plugging component is correspondingly arranged with a joint to be plugged of the joint. The joint air tightness detection device has the advantages of simple structure, strong universality, wide application range and the like.

Description

Joint air tightness detection device

Technical Field

The utility model relates to the technical field of joint air tightness test, in particular to a joint air tightness detection device.

Background

At present, the joint air tightness detection device can only be used for detecting one to two joints, and for the condition that a plurality of joints exist in a factory, the air tightness detection devices with a plurality of specifications are required to be configured for detecting the joints respectively, so that the space occupied by the device is greatly occupied, and the cost of the device is increased.

Disclosure of Invention

The utility model provides the joint air tightness detection device which has the advantages of simple structure arrangement, strong universality and wide application range.

In order to achieve the above object, the following technical solutions are adopted.

The device comprises a double-turntable structure, a test frame and an interface plugging mechanism, wherein the double-turntable structure comprises a rotatable large turntable and a fixed small turntable, the large turntable is positioned below the small turntable, and a plurality of joint placing stations are uniformly distributed on the part of the large turntable, which exceeds the small turntable; the test frame is provided with a pressing mechanism for pressing the joint, the joint plugging mechanism comprises more than one joint plugging component, and the plugging end of the joint plugging component is correspondingly arranged with a joint to be plugged of the joint.

In the technical scheme, the detection device mainly comprises a double-turntable structure, a test frame and an interface plugging mechanism, wherein the double-turntable structure is arranged, a plurality of joint placing stations are arranged on a movable large turntable and used for placing and installing joints, and the interface plugging assembly and the air pipe adjusting joint are arranged on a small turntable, so that the joints are convenient to install and detach, and meanwhile the air pipe is convenient to connect; the setting of test jig is used for installing the hold-down mechanism who compresses tightly the joint on the one hand, and on the other hand is used for installing a plurality of interface shutoff subassembly, and the spatial distribution of make full use of test jig, its structural distribution of this scheme is reasonable, and space utilization is high, and the structure sets up simply, simultaneously, in this scheme, the setting of a plurality of interface shutoff subassemblies makes detection device applicable in the gas tightness detection of the joint of multiple different specifications and interface, and its application scope is wide, has promoted detection device's commonality greatly.

Further, each joint placing station is provided with a joint clamp, and the joint clamp is provided with a plurality of placing clamping grooves for placing joints.

In the above technical scheme, the joint clamp and the arrangement of the clamping groove placed on the joint clamp are corresponding to the matched joint, and the joint clamp corresponding to the joint is selected to be arranged at the joint placing station according to the specifications of different joints, so that the joint clamp is matched with the placed joint.

Further, the number of the interface plugging components is four, namely a first interface plugging component, a second interface plugging component, a third interface plugging component and a fourth interface plugging component, wherein the first interface plugging component, the second interface plugging component, the third interface plugging component and the fourth interface plugging component all comprise more than one joint plugging piece, and the number and the positions of the joint plugging pieces correspond to the number and the positions of joints to be detected on the joint clamp.

Among the above-mentioned technical scheme, every interface shutoff subassembly is suitable for the interface shutoff of the joint of one or more different specifications, and the different directions and the position that four interface shutoff subassemblies set up respectively, and the cooperation setting of its four interface shutoff subassemblies makes detection device can be suitable for the interface shutoff of multiple joint, and then realizes that detection device is suitable for the airtight detection of multiple different specification joints, has promoted detection device's application scope greatly.

Further, the first interface plugging component, the second interface plugging component and the third interface plugging component are respectively fixed on the test frame, the test frame is provided with a plugging fixing frame for respectively fixing and placing the joint plugging pieces on the first interface plugging component, the second interface plugging component and the third interface plugging component, wherein the first interface plugging component is positioned at the position of the test frame corresponding to the joint clamp to be detected, the second interface plugging component is positioned below the first interface plugging component, and the third interface plugging component is positioned below the joint clamp.

In the above technical scheme, the first interface plugging component, the second interface plugging component and the third interface plugging component are respectively fixed on the test frame, the first interface plugging component and the second interface plugging component are respectively positioned on the outer side of the fixing frame, specifically, the first interface plugging component is positioned at the position of the test frame corresponding to the joint clamp to be detected, and plugs the interface on the joint from outside to inside, and the second interface plugging component is positioned below the first interface plugging component and is obliquely arranged from bottom to top to the direction of the joint clamp to be detected; the third interface plugging assembly is located on the inner side of the fixing frame, specifically, the third interface plugging assembly is located below the joint clamp, and plugs the interface of the joint bottom from top to bottom in the direction of the joint clamp to be detected.

Further, the fourth interface plugging component is located above the small rotary disc, a plugging plate for fixing the joint plugging piece in the fourth interface plugging component is arranged on the small rotary disc, and the plugging plate is fixed on the small rotary disc.

According to the technical scheme, the fourth interface plugging assembly is fixedly arranged on the small turntable through the plugging plate, specifically, the plugging end of the fourth interface plugging assembly is located on the inner side of the to-be-detected joint clamp and is correspondingly arranged with the to-be-detected joint clamp, and the fourth interface plugging assembly is used for plugging the interface of the to-be-detected joint in the to-be-detected joint clamp from inside to outside.

Further, the first interface plugging assembly and the fourth interface plugging assembly are horizontally arranged and are respectively positioned at two sides of the joint clamp and used for plugging interfaces of the joint positioned at the outer side and the inner side; the second interface plugging assembly is obliquely arranged and is used for plugging an oblique interface on the joint; the third interface plugging assembly is vertically arranged and is used for plugging an interface of the joint at the bottom.

Among the above-mentioned technical scheme, the first interface shutoff subassembly, second interface shutoff subassembly, the third interface shutoff subassembly that several different positions and different shutoff orientation set up to and the setting of fourth interface shutoff subassembly, make detection device can be applicable to the joint that both sides relatively distribute there is the interface, also can be applicable to one side and distribute there is the interface, and the opposite side distributes there is the slope interface, or one side distributes there is the interface, and the bottom also distributes the gas tightness detection of the joint of the multiple different combination forms of interface.

Further, the joint plugging piece comprises a driving piece and a plug driven by the driving piece, the driving piece is fixed at a position corresponding to the joint to be detected on the plugging fixing frame or the plugging plate, and the driving end of the driving piece is connected with the plug for plugging the joint interface.

Among the above-mentioned technical scheme, the structure that has driving piece and end cap is adopted to connect the shutoff piece constitutes, when needs shutoff connect, starts the interface shutoff that the driving piece can accomplish the joint, and its degree of automation is high, efficient.

Further, hold-down mechanism includes pressing component and pre-compaction subassembly, pressing component includes pressing cylinder and pushes down the casting die, pressing cylinder fixes down on the roof of test jig, pressing cylinder's bottom drive end is connected with down the casting die, pre-compaction subassembly includes pre-compaction cylinder and pre-compaction piece, the pre-compaction cylinder is fixed on the vertical board of test jig, pre-compaction cylinder's bottom drive end is connected with the pre-compaction piece.

Among the above-mentioned technical scheme, adopt the hold-down mechanism that mainly comprises pressing subassembly and pre-compaction subassembly, in specific in-process, carry out the pre-compaction operation to the joint through starting the pre-compaction subassembly earlier and stabilize in suitable position to the joint, the pressing subassembly is pressed down in the restart, effectively ensures the precision and the air density that connect the detection, ensures detection quality.

Further, a first fine tuning piece is arranged on the bottom plate of the test frame and comprises a fixing plate and a fine tuning bolt, a T-shaped pushing block is arranged at the driving end of the fine tuning bolt, and a clamping groove corresponding to the T-shaped pushing block is formed in the bottom plate.

In the above technical scheme, the first fine tuning piece is arranged on the bottom plate of the test frame and used for fine tuning the distance between the test frame and the joint clamp to be detected, so that the pressing mechanism on the test frame and each joint plugging piece are located at proper positions, and the detection accuracy of the detection device is further ensured.

Further, two carousel structural bottoms are equipped with height-adjusting mechanism, height-adjusting mechanism includes adjusting bottom plate and last regulating plate, be equipped with on the adjusting bottom plate and adjust the driving piece, the drive end of adjusting the driving piece is connected with last regulating plate, the both sides of adjusting the bottom plate are equipped with oblong regulation fixed orifices, one end of adjusting the bottom plate still is equipped with the second fine setting spare, the structure and the principle of second fine setting spare are the same with the structure and the principle of first fine setting spare.

In the technical scheme, the position of the joint clamp to be detected is finely adjusted in the height direction through the height adjusting mechanism at the bottom of the turntable; the second fine adjustment piece at one end part of the adjusting bottom plate of the height adjusting mechanism is used for fine adjustment of the position of the joint clamp to be detected in the horizontal direction, so that the position of the joint clamp to be detected corresponds to the pressing mechanism and the joint plugging piece, and the joint position on the joint clamp to be detected is ensured to be accurate.

Compared with the prior art, the joint air tightness detection device has the following beneficial effects:

the structure is simple, the detection device mainly comprises a double-turntable structure, a test frame and an interface plugging mechanism, the whole structure is distributed reasonably, the space utilization rate is high, and the structure is simple to set;

the double-turntable structure is wide in application range and strong in universality, a plurality of joint placing stations are arranged on the movable large turntable and used for placing and installing joints, and the small turntable is used for installing the joint plugging assembly and the air pipe adjusting joint, so that the joints are convenient to install and detach, and meanwhile, the air pipe is convenient to connect; the setting of test frame is used for installing the hold-down mechanism who compresses tightly the joint on the one hand, and on the other hand is used for installing a plurality of interface shutoff subassembly, and the space distribution of make full use of test frame, the setting of a plurality of interface shutoff subassemblies makes detection device applicable in the gas tightness detection of the joint of multiple different specifications and interface, and its application scope is wide, has promoted detection device's commonality greatly.

Drawings

FIG. 1 is a perspective view of a joint air tightness detection device of the present utility model;

FIG. 2 is a perspective view of a portion of the dual turret structure of FIG. 1;

FIG. 3 is a perspective view of the portion of the test rack of FIG. 1;

FIG. 4 is an enlarged partial view of another aspect of the portion of the test rack of FIG. 1;

fig. 5 is an enlarged view of a portion a in fig. 3.

Detailed Description

The joint air tightness detection device of the present utility model will be described in further detail with reference to specific embodiments and drawings.

Referring to fig. 1, in a non-limiting embodiment of the present utility model, a joint air tightness detection device is suitable for air tightness detection of a joint having two mutually communicated interfaces, the detection device includes a double-turntable structure 100, a test rack 200 and an interface plugging mechanism 300, the double-turntable structure 100 includes a rotatable large turntable 110 and a fixed small turntable 120, the large turntable 110 is located below the small turntable 120, and a plurality of joint placing stations 130 are uniformly distributed on a portion of the large turntable 110 beyond the small turntable 120; the test frame 200 is provided with a pressing mechanism 400 for pressing the joint, the joint plugging mechanism 300 comprises more than one joint plugging assembly, and the plugging end of the joint plugging assembly is correspondingly arranged with a joint to be plugged of the joint. In the above technical solution, the detection device mainly comprises a double-turntable structure 100, a test rack 200 and an interface plugging mechanism 300, wherein the double-turntable structure 100 is provided, a plurality of joint placing stations 130 are arranged on the movable large turntable 110 for placing and installing joints, and the small turntable 120 is used for installing an interface plugging assembly and an air pipe adjusting joint, so that the joint is convenient to install and detach, and meanwhile, the air pipe is convenient to connect; the setting of test jig 200 is used for installing the hold-down mechanism 400 that compresses tightly the joint on the one hand, and on the other hand is used for installing a plurality of interface shutoff subassembly, and the space distribution of make full use of test jig 200, its structural distribution of this scheme is reasonable, and space utilization is high, and the structure setting is simple, simultaneously, in this scheme, the setting of a plurality of interface shutoff subassembly makes detection device applicable in the gas tightness detection of the joint of multiple different specifications and interface, and its application scope is wide, has promoted detection device's commonality greatly.

Referring to fig. 1, in a non-limiting embodiment of the present utility model, a joint fixture 500 is provided at each joint placement station 130, and a plurality of placement slots 241510 for placing joints are provided on the joint fixture 500. In the above technical solution, the joint fixture 500 and the arrangement of the holding slot 241510 thereon, the joint fixture 500 corresponds to the matched joint, and according to the specifications of different joints, the joint fixture 500 corresponding to the joint is selected to be arranged at the joint holding station 130, so that the joint fixture 500 is matched with the placed joint. When the device is specifically used, according to the specific specification of the connector, the connector clamp 500 matched with the connector placing station 130 is arranged at the connector placing station 130, then the connector to be detected is sequentially placed in the placing clamping groove 241510 on the connector clamp 500, the large turntable 110 is started to rotate the connector clamp 500 placed in the connector to the position corresponding to the detection of the detection frame 200, the rotation of the large turntable 110 is stopped, and the detection is waited.

Referring to fig. 1, in one non-limiting embodiment of the present utility model, the number of the interface plugging assemblies is four, namely, the first interface plugging assembly 310, the second interface plugging assembly 320, the third interface plugging assembly 330 and the fourth interface plugging assembly 340, and each of the first interface plugging assembly 310, the second interface plugging assembly 320, the third interface plugging assembly 330 and the fourth interface plugging assembly 340 includes more than one connector plugging member 350, and the number and positions of the connector plugging members 350 correspond to the number and positions of the connectors to be detected on the connector fixture 500. Among the above-mentioned technical scheme, every interface shutoff subassembly is suitable for the interface shutoff of the joint of one or more different specifications, and the different directions and the position that four interface shutoff subassemblies set up respectively, and the cooperation setting of its four interface shutoff subassemblies makes detection device can be suitable for the interface shutoff of multiple joint, and then realizes that detection device is suitable for the airtight detection of multiple different specification joints, has promoted detection device's application scope greatly.

Referring to fig. 1, in a non-limiting embodiment of the present utility model, the first interface plugging assembly 310, the second interface plugging assembly 320, and the third interface plugging assembly 330 are respectively fixed on the test frame 200, and the test frame 200 is provided with a plugging fixing frame 210 for fixing and placing the joint plugging members 350 on the first interface plugging assembly 310, the second interface plugging assembly 320, and the third interface plugging assembly 330, respectively, where the first interface plugging assembly 310 is located at a position of the test frame 200 corresponding to the joint fixture 500 to be tested, the second interface plugging assembly 320 is located below the first interface plugging assembly 310, and the third interface plugging assembly 330 is located below the joint fixture 500. In the above technical solution, the first interface plugging component 310, the second interface plugging component 320, and the third interface plugging component 330 are respectively fixed on the test frame 200, the first interface plugging component 310 and the second interface plugging component 320 are respectively located at the outer sides of the test frame 200, specifically, the first interface plugging component 310 is located at a position of the test frame 200 corresponding to the to-be-detected joint fixture 500, and plugs the interface on the joint from outside to inside, and the second interface plugging component 320 is located below the first interface plugging component 310 and is obliquely arranged from bottom to top to the to-be-detected joint fixture 500; the third port plugging assembly 330 is located at the inner side of the test rack 200, specifically, the third port plugging assembly 330 is located below the joint fixture 500, and plugs the port at the bottom of the joint from top to top in the direction of the joint fixture 500 to be tested.

Referring to fig. 1, in a non-limiting embodiment of the present utility model, the fourth port plugging assembly 340 is located above the small turntable 120, and a plugging plate 121 for fixing a joint plugging member 350 in the fourth port plugging assembly 340 is disposed on the small turntable 120, and the plugging plate 121 is fixed on the small turntable 120. In the above technical solution, the fourth interface plugging assembly 340 is fixedly disposed on the small turntable 120 through the plugging plate 121, specifically, the plugging end of the fourth interface plugging assembly 340 is located at the inner side of the joint fixture 500 to be detected and is disposed corresponding to the joint fixture 500 to be detected, so as to plug the interface of the joint to be detected in the joint fixture 500 to be detected from inside to outside. Specifically, the first port plugging assembly 310 and the fourth port plugging assembly 340 are horizontally disposed, and are respectively located at two sides of the joint fixture 500, for plugging the ports of the joint located at the outer side and the inner side; the second port plugging assembly 320 is obliquely arranged and is used for plugging an oblique port on the joint; the third port plugging assembly 330 is vertically arranged and is used for plugging a port of the joint at the bottom. In the above technical solution, the first interface plugging assembly 310, the second interface plugging assembly 320, the third interface plugging assembly 330 and the fourth interface plugging assembly 340, which are disposed at several different positions and in different plugging directions, make the detection device applicable to the air tightness detection of the connectors with interfaces distributed relatively on both sides, and also applicable to the air tightness detection of the connectors with interfaces distributed on one side, inclined interfaces distributed on the other side, or connectors distributed on one side, and interfaces distributed on the bottom.

Referring to fig. 1 and 2, in a non-limiting embodiment of the present utility model, each of the joint plugging members 350 includes a plugging driving member 351 and a plug 352 driven by the plugging driving member 351, wherein the plugging driving member 351 is fixed on the plugging fixing frame 210 or the plugging plate 121 at a position corresponding to a joint to be detected, and a driving end of the driving member is connected with the plug 352 for plugging a joint interface. In the above technical scheme, the joint plugging piece 350 is formed by adopting a structure with the plugging driving piece 351 and the plug 352, when the joint is required to be plugged, the plugging driving piece 351 is started to complete the joint plugging of the joint, and the automatic degree and the efficiency are high. Specifically, in fig. 2 of the present embodiment, a fourth joint plugging assembly 340 mounted on the small turntable 120 and a plurality of joint plugging members 350 in the fourth joint plugging assembly 340 are structured and distributed, the plugging driving member 351 is fixed on the small turntable 120 through the plugging plate 121, and at the same time, after the plugging end of the plugging driving member 351 passes through the plugging plate 121, the plugging driving member 351 drives the joint to move toward the joint to plug the joint, or moves away from the joint.

Referring to fig. 1, 3 and 4, in a non-limiting embodiment of the present utility model, the pressing mechanism 400 includes a pressing assembly 420 and a pre-pressing assembly 410, the pressing assembly 420 includes a pressing cylinder 421 and a pressing piece 422, the pressing cylinder 410 is fixed on the top plate 220 of the test rack 200, the bottom driving end of the pressing cylinder 410 is connected with the pressing piece 422, the pre-pressing assembly 410 includes a pre-pressing cylinder 411 and a pre-pressing piece 412, the pre-pressing cylinder 411 is fixed on the vertical plate of the test rack 200, and the bottom driving end of the pre-pressing cylinder 411 is connected with the pre-pressing piece 412. In the above technical solution, the pressing mechanism 400 mainly comprising the pressing component 420 and the pre-pressing component 410 is adopted, specifically, in this embodiment, the pre-pressing component 412 is a long U-groove plate, one end of the pre-pressing component 412 is connected with the pre-pressing cylinder 411, the other end of the pre-pressing component passes through the vertical plate 230 of the test rack 200 and then protrudes a certain distance, a movable hole (not shown in the figure) for the pre-pressing component to move up and down is provided on the vertical plate 230, in a specific process, the pre-pressing component 410 is started to perform pre-pressing operation on the joint until the joint is stabilized at a proper position, and then the pressing component 420 is started to perform pressing joint, so that the precision and the gas density of joint detection are effectively ensured, and the detection quality is ensured.

Referring to fig. 1, 3 and 5, in a non-limiting embodiment of the present utility model, a first trimming member 700 is disposed on the bottom plate 240 of the test stand 200, the first trimming member 700 includes a fixing plate 710 and a trimming bolt 720, a T-shaped pushing block 730 is disposed at a driving end of the trimming bolt 720, and a clamping groove 241 corresponding to the T-shaped pushing block 730 is disposed on the bottom plate 240. In the above technical solution, the first trimming member 700 is disposed on the bottom plate 240 of the test rack 200, and is used for trimming the distance between the test rack 200 and the joint fixture 500 to be detected, so that the pressing mechanism 400 and the joint plugs 350 on the test rack 200 are located at appropriate positions, and the accuracy of detection by the detection device is further ensured.

Referring to fig. 1 and 2, in a non-limiting embodiment of the present utility model, a height adjusting mechanism 600 is disposed at the bottom of the dual turntable structure 100, the height adjusting mechanism 600 includes an adjusting bottom plate 610 and an upper adjusting plate 620, an adjusting driving member (not shown in the drawing) is disposed on the adjusting bottom plate 610, a driving end of the adjusting driving member is connected with the upper adjusting plate 620, oblong adjusting fixing holes 611 are disposed on two sides of the adjusting bottom plate 610, a second fine adjusting member 630 is further disposed at one end of the adjusting bottom plate 610, and the structure and principle of the second fine adjusting member 630 are the same as those of the first fine adjusting member 700, which are not described herein. In the above technical solution, the position of the joint fixture 500 to be detected is finely adjusted in the height direction by the height adjusting mechanism 600 at the bottom of the large turntable 11; the second fine tuning member 630 at one end of the adjusting bottom plate 610 of the height adjusting mechanism 600 is used for fine tuning the position of the joint clamp 500 to be detected in the horizontal direction, so that the position of the joint clamp 500 to be detected corresponds to the pressing mechanism 400 and the joint plugging member 350, and the joint position on the joint clamp 500 to be detected is ensured to be accurate.

In the description of the present utility model, it should be understood that the terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The foregoing examples are merely exemplary embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the spirit of the utility model, and that these obvious alternatives fall within the scope of the utility model.

Claims (10)

1. The utility model provides a connect gas tightness detection device which characterized in that: the detection device is suitable for detecting the air tightness of the joint with two mutually communicated interfaces, and comprises a double-turntable structure, a test frame and an interface plugging mechanism, wherein the double-turntable structure comprises a rotatable large turntable and a fixed small turntable, the large turntable is positioned below the small turntable, and a plurality of joint placing stations are uniformly distributed on the part of the large turntable, which exceeds the small turntable; the test frame is provided with a pressing mechanism for pressing the joint, the joint plugging mechanism comprises more than one joint plugging component, and the plugging end of the joint plugging component is correspondingly arranged with a joint to be plugged of the joint.

2. The joint air tightness detection device according to claim 1, wherein each joint placing station is provided with a joint clamp, and the joint clamp is provided with a plurality of placing clamping grooves for placing joints.

3. The joint air tightness detection device according to claim 2, wherein the number of the joint plugging components is four, namely a first joint plugging component, a second joint plugging component, a third joint plugging component and a fourth joint plugging component, and the first joint plugging component, the second joint plugging component, the third joint plugging component and the fourth joint plugging component all comprise more than one joint plugging piece, and the number and the positions of the joint plugging pieces correspond to the number and the positions of the joints to be detected on the joint clamp.

4. The joint air tightness detection device according to claim 3, wherein the first interface plugging component, the second interface plugging component and the third interface plugging component are respectively fixed on the test frame, and the test frame is provided with a plugging fixing frame for respectively fixing and placing joint plugging pieces on the first interface plugging component, the second interface plugging component and the third interface plugging component, wherein the first interface plugging component is arranged at a position of the test frame corresponding to a joint clamp to be detected, the second interface plugging component is arranged below the first interface plugging component, and the third interface plugging component is arranged below the joint clamp.

5. The joint air tightness detection device according to claim 4, wherein the fourth joint plugging component is located above the small turntable, and a plugging plate for fixing a joint plugging piece in the fourth joint plugging component is arranged on the small turntable and is fixed on the small turntable.

6. The joint air tightness detection device according to claim 5, wherein the first joint plugging component and the fourth joint plugging component are horizontally arranged and are respectively positioned at two sides of the joint clamp and used for plugging joints positioned at the outer side and the inner side; the second interface plugging assembly is obliquely arranged and is used for plugging an oblique interface on the joint; the third interface plugging assembly is vertically arranged and is used for plugging an interface of the joint at the bottom.

7. The joint air tightness detection device according to claim 6, wherein the joint plugging piece comprises a driving piece and a plug driven by the driving piece, the driving piece is fixed on the plugging fixing frame or the plugging plate at a position corresponding to the joint to be detected, and the driving end of the driving piece is connected with the plug for plugging the joint interface.

8. The joint air tightness detection device according to claim 7, wherein the pressing mechanism comprises a pressing component and a pre-pressing component, the pressing component comprises a pressing cylinder and a pressing piece, the pressing cylinder is fixed on a top plate of the test frame, the bottom driving end of the pressing cylinder is connected with the pressing piece, the pre-pressing component comprises a pre-pressing cylinder and a pre-pressing piece, the pre-pressing cylinder is fixed on a vertical plate of the test frame, and the bottom driving end of the pre-pressing cylinder is connected with the pre-pressing piece.

9. The joint air tightness detection device according to claim 8, wherein a micro-adjusting piece is arranged on a bottom plate of the test frame and comprises a fixing plate and a micro-adjusting bolt, a T-shaped pushing block is arranged at a driving end of the micro-adjusting bolt, and a clamping groove corresponding to the T-shaped pushing block is arranged on the bottom plate.

10. The joint air tightness detection device according to claim 9, wherein a height adjusting mechanism is arranged at the bottom of the double turntable structure.