An ultra-large cold-plate air tightness testing device

Abstract

This invention belongs to the field of mechanical structure design technology and relates to an airtightness testing device for ultra-large cold-rolled steel plates. It includes a rotating pressure rod, a first positioning boss, a tightening rod, a C-shaped bracket, an outer nut, a bearing, a static pressure head, a second positioning boss, an air inlet head, a limiting ring, a third positioning boss, an anti-detachment ring, a sealing ring, a rubber pad, a clamping steel plate, and an airtight joint. During the tightening process, the rolling friction of the bearing replaces the rotational sliding friction, significantly reducing the rotational torque on the joint end face when applying clamping force. This prevents joint twisting and deformation and scratches on the joint end face, effectively ensuring the production quality of the cold-rolled steel plate, ensuring timely delivery to customers, and achieving customer satisfaction. This airtightness testing device effectively seals the joint end, has a simple structure, is easy to operate, and boasts good stability and high reliability. It allows for rapid replacement, contributing to the mass production of cold-rolled steel plates and improving production efficiency; thereby ensuring the brazing quality of the cold-rolled steel plates.

Description

Technical Field

[0001] This invention belongs to the field of mechanical structure design technology and relates to an airtightness testing device for ultra-large cold-rolled steel plates. Background Technology

[0002] Currently, with the trend towards larger and more integrated equipment, there is an increasing demand for ultra-large (size greater than 1.5m × 800mm) cold plates in heat exchange applications. These cold plates have a typical planar structure, with the joint lying on one end of the plate's flat surface. They are devices used for thermal management in electronic equipment. During their production and development, the joint end face of the cold plate needs to be sealed to enable airtightness testing. However, after brazing the cold plate, the joint end face lacks a sealing fastening structure (such as through holes or threaded blind holes), and the large size of the cold plate makes handling inconvenient, posing significant challenges to airtightness testing, slowing down research and production progress, and posing challenges to both production efficiency and manufacturing costs.

[0003] In existing technology, for horizontal joint cold plates, typically around 500mm × 300mm in size, conventional airtight fixtures usually consist of two rectangular pressure plates at both ends of the cold plate along the inlet and outlet axis of the horizontal joint. These pressure plates are then tightened by screws, causing deformation of the rubber gasket between the pressure plates and the cold plate (joint end face), thus sealing the joint end face and facilitating airtightness testing. However, this airtight fixture has drawbacks. During screw tightening, uneven force applied by the screws on both sides can easily cause joint deformation, damage, and reduced sealing reliability, increasing the risk of cold plate scrapping and fixture reassembly. Furthermore, the relatively long and heavy screws are prone to scratching the cold plate during assembly, compromising its appearance quality. Summary of the Invention

[0004] Purpose of the invention

[0005] This invention provides an ultra-large-size cold-rolled steel plate airtightness testing device, achieving effective sealing at the joint ends, enabling rapid replacement, facilitating mass production of cold-rolled steel plates, improving production efficiency, and ensuring the quality of cold-rolled steel plate brazing. Simultaneously, during the tightening process, the rolling friction of the bearing replaces the rotational sliding friction, significantly reducing the rotational torque on the joint end face when applying clamping force, preventing joint twisting deformation and scratches on the joint end face. Furthermore, this device allows for universal application to different joint sizes, greatly reducing the production cost of cold-rolled steel plates.

[0006] Technical solution

[0007] An airtightness testing device for ultra-large cold-rolled steel plates includes a rotating pressure rod, a first positioning boss, a tightening rod, a C-shaped bracket, an outer nut, a bearing, a static pressure head, a second positioning boss, an air inlet seal, a limiting ring, a third positioning boss, an anti-loosening ring, a sealing ring, a rubber pad, a pressing steel plate, and an airtight joint. The rotating pressure rod is provided with a first positioning boss and an external thread; one end of the C-shaped bracket is provided with an internal thread, and the rotating pressure rod is threadedly engaged with the C-shaped bracket. The tightening rod passes through a through hole on the rotating pressure rod. The bearing contacts the first positioning boss on the rotating pressure rod and the second positioning boss on the static pressure head, respectively, and is positioned between the first and second positioning bosses. The second positioning boss is inserted into a loosening ring on the bearing, and the first positioning boss is... The bearing has a tight ring insertion; the outer nut is threadedly connected to the static pressure head; the air inlet end cap is provided with a limit ring, a third positioning boss, and an anti-detachment ring; one end of the air inlet end cap contacts the static pressure head, and the anti-detachment ring on the air inlet end cap prevents uneven force on the contact surface between the air inlet end cap and the static pressure head; the other end of the air inlet end cap is in positioning contact with the joint of the cold plate, and is positioned by the third positioning boss; the sealing ring is set between the joint of the air inlet end cap and the cold plate, and is limited by the limit ring; the rubber pad and the pressing steel plate are assembled between the other end of the C-shaped frame and the joint of the cold plate, and are in compression contact; the airtight joint is in positioning contact with the air inlet end cap and is sealed by argon arc welding, and high-pressure gas enters the inner cavity of the cold plate through the airtight joint.

[0008] In use, the two sets of airtightness testing devices are respectively installed on two joints of the cold plate. The airtight joint of one set of airtightness testing devices is sealed with an airtight plug, and the airtight joint of the other set of airtightness testing devices is connected to the equipment to carry out airtightness testing.

[0009] Furthermore, the airtight plug is made of one or more metals with a hardness lower than stainless steel.

[0010] Furthermore, the sealing ring and rubber gasket are made of rubber.

[0011] Furthermore, the diameter of the third positioning boss should be 0.2 mm smaller than the inner diameter of the connector.

[0012] Furthermore, the height of the limiting ring should be greater than 1.5mm, while ensuring that the distance between the sealing surface of the joint and the axial end face of the limiting ring 71 is 1mm.

[0013] Furthermore, the height of the anti-detachment ring should be greater than 1 mm.

[0014] Furthermore, the rotating rod is deformed.

[0015] Furthermore, the bearing is a thrust ball bearing, which requires the application of grease before use.

[0016] Furthermore, after tightening, the rotating pressure rod and the outer nut should not be in axial contact and should have a 0.5mm gap. Simultaneously, ensure that the thread direction is either right-handed or consistent.

[0017] Furthermore, the rubber pad and the pressing steel plate are the same size, the same as the joint size, and larger than the size of the C-frame pressing position, and the thickness of the pressing steel plate is greater than 2mm.

[0018] The beneficial effects of this application are as follows:

[0019] This cold-rolled steel plate airtightness testing device effectively seals the joint ends. It features a simple structure, convenient operation, high stability and reliability, and allows for rapid changeover, facilitating mass production of cold-rolled steel plates and improving production efficiency, thereby ensuring the quality of cold-rolled steel plate brazing. Simultaneously, during tightening, the rolling friction of the bearing replaces the rotational sliding friction, significantly reducing the rotational torque on the joint end face when applying pressure. This prevents joint twisting and deformation, as well as scratches on the joint end face, effectively ensuring the production quality of the cold-rolled steel plate, enabling on-time delivery to customers, and achieving customer satisfaction. Furthermore, the device can seal the end faces of different joint inlet and outlet orifices by changing the air inlet end caps of different sizes, improving the adaptability of the airtightness testing device to cold-rolled steel plates of different sizes and specifications, and enabling the rapid, standardized, and low-cost development of cold-rolled steel plates. Due to its innovative structural design, the device is also suitable for airtightness testing of vertical joint cold-rolled steel plate structures, with significant results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the airtightness testing device.

[0021] Figure 2 A 3D diagram of a handheld capillary bending device;

[0022] Figure 3 This is a magnified view of a portion of the image.

[0023] Among them, there are: rotating pressure rod 1, first positioning boss 101, tightening rod 2, C-shaped frame 3, outer nut 4, bearing 5, static pressure head 6, second positioning boss 61, air inlet seal head 7, limit ring 71, third positioning boss 72, anti-detachment ring 73, sealing ring 8, joint 9, rubber pad 10, pressing steel plate 11, cold plate 12, airtight joint 13, and airtight plug 14. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions in the embodiments of this invention will be described in more detail below. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this invention. The embodiments described below with reference to reference are exemplary and intended to explain this invention, and should not be construed as limiting the invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The embodiments of this invention will be described in detail below.

[0025] An airtightness testing device for ultra-large cold-rolled steel plates includes a rotating pressure rod 1, a first positioning boss 101, a tightening rod 2, a C-shaped frame 3, an outer nut 4, a bearing 5, a static pressure head 6, a second positioning boss 61, an air inlet seal 7, a limiting ring 71, a third positioning boss 72, an anti-detachment ring 73, a sealing ring 8, a rubber pad 10, a pressing steel plate 11, and an airtight joint 13. The rotating pressure rod 1 is provided with the first positioning boss 101 and an external thread; one end of the C-shaped frame 3 is provided with an internal thread, and the rotating pressure rod 1 and the C-shaped frame 3 are threadedly connected. The tightening rod 2 passes through a through hole on the rotating pressure rod 1. The bearing 5 contacts the first positioning boss 101 on the rotating pressure rod 1 and the second positioning boss 61 on the static pressure head 6, and is positioned between the first positioning boss 101 and the second positioning boss 61. The second positioning boss 61 is inserted into a loosening ring on the bearing 5. 101 is inserted into the tight ring on the bearing 5; the outer nut 4 is threadedly connected to the static pressure head 6; the air inlet end cap 7 is provided with a limit ring 71, a third positioning boss 72, and an anti-detachment ring 73; one end of the air inlet end cap 7 contacts the static pressure head 6, and the anti-detachment ring 73 on the air inlet end cap 7 prevents uneven force on the contact surface between the air inlet end cap 7 and the static pressure head 6; the other end of the air inlet end cap 7 is in positioning contact with the joint 9 of the cold plate 12, and is positioned by the third positioning boss 72; the sealing ring 8 is set between the air inlet end cap 7 and the joint 9 of the cold plate 12, and is limited by the limit ring 71; the rubber pad 10 and the pressing steel plate 11 are assembled between the other end of the C-shaped frame 3 and the joint 9 of the cold plate 12, and are in compression contact; the airtight joint 13 is in positioning contact with the air inlet end cap 7 and is sealed by argon arc welding, and high-pressure gas enters the inner cavity of the cold plate 12 through the airtight joint 13.

[0026] In use, the two sets of airtightness testing devices are respectively installed on the two joints 9 of the cold plate 12. The airtightness joint 13 of one set of airtightness testing devices is sealed with an airtightness plug 14, and the airtightness joint 13 of the other set of airtightness testing devices is connected to the equipment to carry out airtightness testing.

[0027] In one possible embodiment, the airtight plug 14 is made of brass or one or more of a hardness lower than stainless steel. The remaining metal parts are all made of stainless steel.

[0028] In one possible embodiment, the sealing ring 8 and the rubber gasket 10 are made of one or more types of rubber or silicone rubber.

[0029] In one possible embodiment, the diameter of the third positioning boss 72 should be 0.2 mm smaller than the inner diameter of the connector 9. (This enables small-gap positioning and allows for a very small amount of wobble.)

[0030] In one possible embodiment, the height of the limiting ring 71 should be greater than 1.5 mm, while ensuring that the distance between the sealing surface of the connector 9 and the axial end face of the limiting ring 71 is 1 mm. Because the sealing ring 8 is 3 mm in this embodiment, the height of the limiting ring 71 should be less than the height of the sealing ring 8 to allow for compression space.

[0031] In one possible embodiment, the height of the anti-detachment ring 73 should be greater than 1 mm.

[0032] In one possible embodiment, the rotating rod 2 is deformed to prevent it from falling out of the through hole of the rotating pressure rod 1.

[0033] In one possible embodiment, the bearing 5 is a thrust ball bearing, which requires the application of grease before use.

[0034] In one possible embodiment, after tightening, the rotating pressure rod 1 and the outer nut 4 should not be in axial contact and should have a gap of 0.5mm. At the same time, the thread direction should be either right-handed or consistent.

[0035] In one possible embodiment, the rubber pad 10 and the pressing steel plate 11 are the same size (length and width), which is comparable to the joint size and larger than the pressing position size of the C-frame 3, and the thickness of the pressing steel plate 11 is greater than 2mm.

[0036] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the present invention. Within the spirit and principles of the present invention, any person skilled in the art may use the disclosed technical content to make changes or modifications to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention, any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of the present invention.

Claims

1. A device for testing the airtightness of ultra-large cold-rolled steel plates, characterized in that, The assembly includes a rotating pressure rod, a first positioning boss, a tightening rod, a C-shaped bracket, an outer nut, a bearing, a static pressure head, a second positioning boss, an air inlet seal, a limiting ring, a third positioning boss, an anti-loosening ring, a sealing ring, a rubber gasket, a clamping steel plate, and an airtight joint. The rotating pressure rod has a first positioning boss and an external thread; one end of the C-shaped bracket has an internal thread, and the rotating pressure rod is threadedly engaged with the C-shaped bracket. The tightening rod passes through a through hole on the rotating pressure rod. The bearing contacts the first positioning boss on the rotating pressure rod and the second positioning boss on the static pressure head, respectively, and is positioned between the first and second positioning bosses. The second positioning boss is inserted into a loose ring on the bearing, and the first positioning boss is inserted into a tight ring on the bearing. The outer nut is threadedly connected to the static pressure head; the air inlet end cap is provided with a limit ring, a third positioning boss, and an anti-detachment ring; one end of the air inlet end cap contacts the static pressure head, and the anti-detachment ring on the air inlet end cap prevents uneven force on the contact surface between the air inlet end cap and the static pressure head; the other end of the air inlet end cap is in positioning contact with the joint of the cold plate, and is positioned by the third positioning boss; the sealing ring is set between the joint of the air inlet end cap and the cold plate, and is limited by the limit ring; the rubber pad and the pressing steel plate are assembled between the other end of the C-shaped frame and the joint of the cold plate, and are in compression contact; the airtight joint is in positioning contact with the air inlet end cap and is sealed by argon arc welding, and high-pressure gas enters the inner cavity of the cold plate through the airtight joint.

2. The apparatus as claimed in claim 1, characterized in that, In use, the two sets of airtightness testing devices are respectively installed on two joints of the cold plate. The airtight joint of one set of airtightness testing devices is sealed with an airtight plug, and the airtight joint of the other set of airtightness testing devices is connected to the equipment to carry out airtightness testing.

3. The apparatus as described in claim 2, characterized in that, The airtight plug is made of one or more metals with a hardness lower than that of stainless steel.

4. The apparatus as described in claim 3, characterized in that, The sealing ring and rubber gasket are made of rubber.

5. The apparatus as claimed in claim 4, characterized in that, The diameter of the third positioning boss should be 0.2 mm smaller than the inner diameter of the connector.

6. The apparatus as claimed in claim 5, characterized in that, The height of the limiting ring should be greater than 1.5mm, and the distance between the sealing surface of the joint and the axial end face of the limiting ring should be 1mm.

7. The apparatus as claimed in claim 6, characterized in that, The height of the anti-detachment ring should be greater than 1mm; the tightening rod should be deformed.

8. The apparatus as claimed in claim 7, characterized in that, The bearing is a thrust ball bearing, which requires the application of grease before use.

9. The apparatus as claimed in claim 8, characterized in that, After tightening, the rotating pressure rod and the outer nut should not be in axial contact and should have a gap of 0.5mm; at the same time, the thread direction should be right-handed or consistent.

10. The apparatus as claimed in claim 9, characterized in that, The rubber pad and the pressing steel plate are the same size, the same as the joint size, and larger than the size of the C-frame pressing position. The thickness of the pressing steel plate is greater than 2mm.

Images