Duckbilled vacuum box for air tightness detection

Abstract

The utility model discloses a duckbilled vacuum box for air tightness detection, and belongs to the technical field of workpiece sealing detection. The technical key points are as follows: a duckbilled lower box body and a duckbilled upper box body form a duckbilled vacuum box; the movable end of the air cylinder is hinged to the rear end of the connecting rod. An upper top plate connecting block is fixedly arranged on the front side of the upper surface of the upper top plate, and the front end of the connecting rod is fixedly connected with the upper top plate connecting block; a rear plate connecting component is fixedly arranged on the rear surface of the rear plate and hinged to the middle of the connecting rod. The utility model aims to provide the duckbilled vacuum box for air tightness detection, so that a workpiece to be detected can be conveniently placed from the front side of the box body, and the workpiece to be detected can be conveniently connected with an inflation joint in the vacuum box body.

Description

Technical Field

[0001] The utility model relates to the technical field of workpiece sealing detection, and more specifically, particularly relates to a duckbill type vacuum box for airtightness detection. Background Art

[0002] The vacuum box airtightness leak detection method uses helium as the tracer gas, evacuates the vacuum box, and fills the workpiece placed in the vacuum box with positive pressure helium. If the workpiece has a leak, helium will leak into the vacuum box, and the helium leak detector can determine whether the workpiece has a leak.

[0003] The vacuum box is a particularly important component in the air tightness testing process. It not only needs to have a good background and very little gas accumulation to ensure the vacuum box's evacuation efficiency, but also needs to have a certain pressure-bearing strength to ensure that the box does not deform when an extremely low vacuum is drawn. The door opening mechanism of the vacuum box also needs to be safe and stable, with reliable sealing to ensure leak detection accuracy.

[0004] The existing vacuum box generally adopts a square structure (such as CN116792009A, CN203141038U), and uses a flat plate of a certain thickness as a single door. Its pressure-bearing strength is insufficient, and it is often necessary to thicken the door plate and weld a lot of reinforcing ribs. When the size of the workpiece to be inspected is too large, the size of the box body needs to be relatively enlarged, which is not convenient for manually placing the workpiece to be inspected. The manual door opening mechanism has poor stability, and the structure needs to be pre-tightened before the box is closed and vacuumed each time. The sealing performance of the leak detection is difficult to ensure. The manual door opening and closing structure not only affects the detection rhythm, but also cannot guarantee safety.

[0005] Therefore, it is necessary to develop a vacuum box with high reliability. Utility Model Content

[0006] The utility model aims to provide a duckbill vacuum box for air tightness detection in view of the above-mentioned deficiencies in the prior art.

[0007] The technical solution of the utility model is:

[0008] A duckbill vacuum box for air tightness testing, comprising: a duckbill lower box body, a duckbill upper box body, and an upper box body opening and closing mechanism;

[0009] The duckbill lower box body comprises: a lower bottom plate, a rear plate, two lower side plates, and a lower flange; the rear plate and the two lower side plates are respectively arranged on the rear side, left side, and right side of the upper surface of the lower bottom plate; the connecting end of the duckbill lower box body is provided with a lower flange;

[0010] The duckbill upper box body comprises: an upper top plate, a front plate, two upper side plates, and an upper flange; the front plate and the two upper side plates are respectively arranged on the front side, the left side, and the right side of the lower surface of the upper top plate; the connecting end of the duckbill upper box body is provided with an upper flange;

[0011] Wherein, the lower side plate and the upper side plate are both upper angled; the lower flange and the upper flange are both oblique flanges:

[0012] The upper box opening and closing mechanism includes: n driving mechanisms arranged in parallel; n is an integer greater than or equal to 2;

[0013] The driving mechanism comprises: a cylinder assembly and a connecting rod; the cylinder assembly comprises: a cylinder support seat and a cylinder;

[0014] The fixed end of the cylinder is hingedly connected to the cylinder support seat, and the movable end of the cylinder is hingedly connected to the rear end of the connecting rod;

[0015] Among them, the cooperation relationship between the duckbill lower box, the duckbill upper box, and the upper box opening and closing mechanism is:

[0016] An upper plate connecting block is fixedly provided on the front side of the upper surface of the upper plate of the duckbill upper box, and the front end of the connecting rod is fixedly connected to the upper plate connecting block;

[0017] A rear plate connecting member is fixedly provided on the rear surface of the rear plate of the duckbill lower box, and the rear plate connecting member is hingedly connected to the middle part of the connecting rod.

[0018] Furthermore, a pressure block is arranged on the rear side of the upper surface of the upper top plate; a groove is arranged on the upper part of the pressure block, the middle part of the connecting rod is adapted to the groove, and the connecting rod is inserted into the groove.

[0019] Furthermore, the duckbill lower box body also includes: a lower box body reinforcement member, and the lower box body reinforcement member is arranged on the lower surface of the lower bottom plate.

[0020] Furthermore, the duckbill upper box also includes: an upper box reinforcement member, and the upper box reinforcement member is arranged on the upper surface of the upper top plate.

[0021] Furthermore, a dovetail groove is designed on the upper side of the lower flange to place an O-type fluororubber ring.

[0022] Furthermore, a driving mechanism connecting rod is arranged between the n connecting rods.

[0023] Furthermore, the duckbill lower box body and the duckbill upper box body are both welded with stainless steel.

[0024] Furthermore, the lower box body reinforcement member and the upper box body reinforcement member are both welded by longitudinal reinforcement ribs and transverse reinforcement ribs.

[0025] Furthermore, the duckbill lower box is provided with the following interfaces: a vacuum extraction interface, a box air release valve interface, a vacuum degree measuring instrument connection interface, and a workpiece inflation interface.

[0026] The beneficial effects of this application are:

[0027] (1) This application proposes a duckbill vacuum box for air tightness testing, which is suitable for the air tightness testing of automobile air-conditioning condensers and evaporators. In the design of the box body, the duckbill lower box body and the duckbill upper box body are connected by oblique flanges. When placing workpieces, the duckbill lower box body and the duckbill upper box body are similar to the lower mouth of a duck. The pressure bearing capacity of the box cover with a duckbill structure is better than that of a flat door panel structure. Its duckbill box body can not only facilitate the placement of the workpiece to be tested from the front side of the box body, but also facilitate the connection between the workpiece to be tested and the inflation joint in the vacuum box body.

[0028] (2) The present application proposes an upper box opening and closing mechanism, which realizes the opening and closing of the duckbill lower box and the duckbill upper box, without the need for a manual pre-tightening structure. The design of the present application makes the duckbill vacuum box door opening smoother, more stable, safer and more reliable, which is suitable for production lines for air tightness testing and can greatly improve the leak detection stability and beat requirements of the workpiece to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described in detail below in conjunction with the embodiments in the accompanying drawings, but this does not constitute any limitation to the present invention.

[0030] Figure 1 It is a three-dimensional structural design diagram of the duckbill vacuum box of Example 1 (in a closed state).

[0031] Figure 2 1 is a side elevation view of the duckbill vacuum box of the first embodiment (in a closed state).

[0032] Figure 3 It is a three-dimensional structural design diagram of the duckbill vacuum box of Example 1 (in the open state).

[0033] Figure 4 It is a three-dimensional structural design diagram of the duckbill vacuum box of Example 1 at another angle (in the open state).

[0034] Figure 5 It is a three-dimensional structural design diagram of the duckbill vacuum box of Example 1 at other angles (in the open state).

[0035] Figure 6 It is a three-dimensional design schematic diagram of the first rod middle hinge component of the first embodiment.

[0036] Figure 7 It is a schematic diagram of the three-dimensional structural design of the upper box opening and closing mechanism of the first embodiment.

[0037] Figure 1-Figure 7 The reference numerals in the figures are described as follows:

[0038] Duckbill vacuum box 1000;

[0039] Duckbill lower box 100, lower bottom plate 101, rear plate 102, lower side plate 103, lower flange 104, lower box reinforcement member 105, O-type fluoro rubber ring 106;

[0040] Duckbill upper box 200, upper top plate 201, front plate 202, two upper side plates 203, upper flange 204, upper box reinforcement member 205;

[0041] Upper box opening and closing mechanism 300, cylinder support seat 301, cylinder 302, connecting rod 303, driving mechanism connecting rod 304;

[0042] A first rod middle hinge member 400, a horizontal connection member 401, a vertical connection ear plate 402, and a hinge shaft 403;

[0043] Upper top plate connecting block 500 and pressing plate device 600. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the utility model. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the utility model.

[0045] <Example 1: A duckbill vacuum box for air tightness testing>

[0046] from Figure 1-7 It can be known that a duckbill vacuum box 1000 for air tightness detection includes: a duckbill lower box body 100, a duckbill upper box body 200, and an upper box body opening and closing mechanism 300.

[0047] Among them, the duckbill lower box 100 includes: a lower base plate 101, a rear plate 102, two lower side plates 103, a lower flange 104, and a lower box reinforcement member 105; the rear plate 102 and the two lower side plates 103 are respectively arranged on the rear side, left side, and right side of the upper surface of the lower base plate 101; the lower surface of the lower base plate 101 is provided with a lower box reinforcement member 105.

[0048] Among them, the duckbill upper box 200 includes: an upper top plate 201, a front plate 202, two upper side plates 203, an upper flange 204, and an upper box reinforcement member 205; the front plate 202 and the two upper side plates 203 are respectively arranged on the front side, left side, and right side of the lower surface of the upper top plate 201; the upper surface of the upper top plate 201 is provided with an upper box reinforcement member 205.

[0049] The matching relationship between the duckbill lower box 100 and the duckbill upper box 200 is:

[0050] (1) The connecting end of the duckbill lower box body 100 is provided with a lower flange 104, and the connecting end of the duckbill upper box body 200 is provided with an upper flange 204;

[0051] (2) The lower side plate 103 and the upper side plate 203 are both upward angled, and the lower flange 104 and the upper flange 204 are both oblique flanges: the angle between the plane where the lower flange 104 is located and the plane where the lower bottom plate 101 is located is α, and the angle between the plane where the upper flange 204 is located and the plane where the lower bottom plate 101 is located is also α.

[0052] (3) A dovetail groove is designed on the upper side of the lower flange 104 to place an O-type fluorine rubber ring 106. The O-type fluorine rubber ring 106 is used to ensure the sealing performance when the duckbill lower box body 100 and the duckbill upper box body 200 are combined together.

[0053] Among them, the upper box opening and closing mechanism includes: 2 driving mechanisms arranged in parallel; the driving mechanism includes: a cylinder assembly, a connecting rod 303; the cylinder assembly includes: a cylinder support seat 301, a cylinder 302; the fixed end of the cylinder 302 is hingedly connected to the cylinder support seat 301, and the movable end of the cylinder 302 is hingedly connected to the rear end of the connecting rod 303.

[0054] The matching relationship between the duckbill lower box 100, the duckbill upper box 200, and the upper box opening and closing mechanism 300 is:

[0055] (1) A rear plate connecting member is fixedly provided on the rear surface of the rear plate of the duckbill lower box 100, and the rear plate connecting member is hingedly connected to the middle part of the connecting rod.

[0056] The rear plate connecting member comprises a horizontal connecting member 401 and a vertical connecting ear plate 402 ; the vertical connecting ear plate 402 is arranged on the upper surface of the horizontal connecting member 401 ; a hinge shaft 403 is fixedly arranged on the vertical connecting ear plate 402 , and the middle part of the connecting rod 303 is hinged on the hinge shaft 403 .

[0057] (2) The front and rear sides of the upper surface of the upper top plate are respectively provided with an upper top plate connecting block 500 and a pressing block 600; the front end of the connecting rod 303 is fixedly connected to the upper top plate connecting block 500; the upper part of the pressing block 600 is provided with a groove, the middle part of the connecting rod 303 is adapted to the groove, and the connecting rod 303 is inserted into the groove. The function of the pressing block 600 is to ensure the sealing of the duckbill upper box 200 and the duckbill lower box 100 at the rear side.

[0058] It should be noted that a driving mechanism connecting rod 304 is arranged between the two parallel connecting rods 303 ; the driving mechanism connecting rod 304 is used to strengthen the integrity of the driving mechanism.

[0059] The duckbill lower box body 100 and the duckbill upper box body 200 are both welded with stainless steel.

[0060] It should be noted that the lower box reinforcement member 105 and the upper box reinforcement member 205 are welded by longitudinal reinforcement ribs and transverse reinforcement ribs, and the lower box reinforcement member 105 and the upper box reinforcement member 205 are used to improve the pressure-bearing strength of the lower bottom plate 101 and the upper top plate 201, thereby reducing the deformation generated during the vacuuming process. The longitudinal and transverse reinforcement ribs are solid rectangular carbon steel bars, which are painted after welding to avoid rust.

[0061] It should be noted that the duckbill lower box 100 is provided with at least the following interfaces: a vacuum extraction interface, a box air release valve interface, a vacuum degree measuring instrument connection interface, and a workpiece inflation interface.

[0062] The above embodiments are preferred implementation modes of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the relevant technical field, if they do not depart from the scope of the technical features of the present invention, can make equivalent embodiments by partial changes or modifications to the technical contents disclosed in the present invention, and they still fall within the scope of the technical features of the present invention without departing from the technical features of the present invention.

Claims

1. A duckbill vacuum box for air tightness testing, characterized in that: include: Duckbill lower box, duckbill upper box, upper box opening and closing mechanism; The duckbill lower box body comprises: a lower bottom plate, a rear plate, two lower side plates, and a lower flange; the rear plate and the two lower side plates are respectively arranged on the rear side, left side, and right side of the upper surface of the lower bottom plate; the connecting end of the duckbill lower box body is provided with a lower flange; The duckbill upper box body comprises: an upper top plate, a front plate, two upper side plates, and an upper flange; the front plate and the two upper side plates are respectively arranged on the front side, the left side, and the right side of the lower surface of the upper top plate; the connecting end of the duckbill upper box body is provided with an upper flange; Wherein, the lower side plate and the upper side plate are both upper angled; the lower flange and the upper flange are both oblique flanges: The upper box opening and closing mechanism includes: n driving mechanisms arranged in parallel; n is an integer greater than or equal to 2; The driving mechanism comprises: a cylinder assembly and a connecting rod; the cylinder assembly comprises: a cylinder support seat and a cylinder; The fixed end of the cylinder is hingedly connected to the cylinder support seat, and the movable end of the cylinder is hingedly connected to the rear end of the connecting rod; Among them, the cooperation relationship between the duckbill lower box, the duckbill upper box, and the upper box opening and closing mechanism is: An upper plate connecting block is fixedly provided on the front side of the upper surface of the upper plate of the duckbill upper box, and the front end of the connecting rod is fixedly connected to the upper plate connecting block; A rear plate connecting member is fixedly provided on the rear surface of the rear plate of the duckbill lower box, and the rear plate connecting member is hingedly connected to the middle part of the connecting rod.

2. A duckbill vacuum box for air tightness testing according to claim 1, characterized in that: A pressure block is arranged on the rear side of the upper surface of the upper top plate; a groove is arranged on the upper part of the pressure block, the middle part of the connecting rod is adapted to the groove, and the connecting rod is stuck in the groove.

3. A duckbill vacuum box for air tightness testing according to claim 1, characterized in that: The duckbill lower box also includes: a lower box reinforcement member, and the lower box reinforcement member is arranged on the lower surface of the lower bottom plate.

4. A duckbill vacuum box for air tightness testing according to claim 3, characterized in that: The duckbill upper box body further comprises: an upper box body reinforcement member, and the upper box body reinforcement member is arranged on the upper surface of the upper top plate.

5. The duckbill vacuum box for air tightness testing according to claim 1, characterized in that: A dovetail groove is designed on the upper side of the lower flange to place an O-type fluororubber ring.

6. A duckbill vacuum box for air tightness testing according to claim 1, characterized in that: A driving mechanism connecting rod is arranged between the n connecting rods.

7. A duckbill vacuum box for air tightness testing according to claim 1, characterized in that: The duckbill lower box and duckbill upper box are welded with stainless steel.

8. A duckbill vacuum box for air tightness testing according to claim 4, characterized in that: The lower box body reinforcement components and the upper box body reinforcement components are both welded by longitudinal reinforcement ribs and transverse reinforcement ribs.

9. The duckbill vacuum box for air tightness testing according to claim 1, characterized in that: The duckbill lower box is provided with the following interfaces: vacuum extraction interface, box air release valve interface, vacuum degree measuring instrument connection interface, and workpiece inflation interface.

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