Air tightness detection device for oversized cold plate

Abstract

The invention belongs to the technical field of mechanical structure design, and relates to an air tightness detection device for an oversized cold plate. Comprising a rotary pressing rod, a first positioning boss, a screwing rod, a C-shaped frame, an outer sleeve nut, a bearing, a static pressure head, a second positioning boss, an air inlet end socket, a limiting ring, a third positioning boss, an anti-disengaging ring, a sealing ring, a rubber pad, a pressing steel plate and an airtight connector. In the screwing force application process, the rolling friction force of the bearing replaces the rotating sliding friction force, and when pressing force is applied to the end face of the connector, the rotating torque of the connector is greatly reduced, distortion and deformation of the connector and scratching of the end face of the connector can be prevented, the production quality of the cold plate is effectively guaranteed, the cold plate is delivered to customers on time, and customer satisfaction is achieved. According to the cold plate air tightness detection device, sealing of the end portion of the connector is effectively achieved, the structure is simple, operation is convenient, stability is good, reliability is high, rapid replacement can be achieved, batch production of cold plates is facilitated, and production efficiency is improved; and therefore, the cold plate brazing quality is ensured.

Description

Technical Field

[0001] The invention belongs to the technical field of mechanical structure design and relates to an air tightness detection device for an oversized cold plate. Background Art

[0002] At present, with the development of equipment towards large-scale and high integration, there is an increasing demand for super-large-sized (specifications greater than 1.5m×800mm) cold plates in terms of heat exchange. The cold plate is a typical planar structure with the joint lying on its side at one end of the cold plate plane. It is a device for achieving heat management of electronic equipment. During its production and development process, it is necessary to seal the end face of the cold plate joint to achieve the air tightness test of the cold plate. After the cold plate is brazed, the end face of the joint lacks a fastening structure for sealing (such as a through hole or a threaded blind hole), and the cold plate is large in size and inconvenient to carry, which causes great difficulties in air tightness testing, slows down the progress of scientific research and production, and poses challenges to production efficiency and manufacturing costs.

[0003] In the prior art, for this type of horizontal joint cold plate, and the size of this type of cold plate is generally around 500mm×300mm, the conventional airtight tooling is generally to set two rectangular pressure plates at both ends of the cold plate in the direction of the inlet and outlet axis of the horizontal joint, and to compress the pressure plates through screws, and then cause the rubber pads set between the pressure plates and the cold plate (joint end face) to deform, so as to achieve the purpose of sealing the joint end face, so that the airtightness detection work can be carried out smoothly. The disadvantage of this airtight tooling is that when the screw is tightened, due to the unbalanced force applied by the screws on both sides, it is very easy to cause defects such as deformation and compression of the joint and reduce the reliability of the joint end face sealing, which increases the risk of scrapping the cold plate and reassembling the tooling. In addition, due to the long length and heavy weight of the screw, it is very easy to scratch the cold plate during the assembly process, and the appearance quality of the cold plate cannot be well guaranteed. Summary of the invention

[0004] Purpose of the Invention

[0005] An oversized cold plate air tightness detection device is provided to achieve effective sealing of the joint end and quick replacement, which is helpful for mass production of cold plates and improves production efficiency; it also ensures the quality of cold plate brazing. At the same time, during the tightening force application process, the rolling friction of the bearing replaces the rotational sliding friction, and when the clamping force is applied to the joint end face, the rotational torque of the joint is greatly reduced, which can prevent the joint from twisting and deformation and scratching the joint end face. In addition, the device can also realize universal application of different joint sizes, greatly reducing the production cost of cold plates.

[0006] Technical Solution

[0007] A device for detecting air tightness of an oversized cold plate, comprising a rotating pressure rod, a first positioning boss, a tightening rod, a C-frame, a sleeve nut, a bearing, a static pressure head, a second positioning boss, an air inlet head, a limit ring, a third positioning boss, an anti-slip ring, a sealing ring, a rubber pad, a clamping 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-frame is provided with an internal thread, and the rotating pressure rod is screwed and connected with the C-frame thread; the tightening rod passes through a through hole on the rotating pressure rod; the bearing contacts with the first positioning boss on the rotating pressure rod and the second positioning boss on the static pressure head respectively, and is located between the first positioning boss and the second positioning boss; the second positioning boss is plugged into a loose ring on the bearing, and the first positioning boss is screwed into The tightening ring on the bearing is plugged in; the outer sleeve nut is screwed and connected with the static pressure head thread; a limit ring, a third positioning boss and an anti-slip ring are arranged on the air inlet head; one end of the air inlet head is in contact with the static pressure head, and the anti-slip ring on the air inlet head is used to prevent uneven force on the contact surface between the air inlet head and the static pressure head; the other end of the air inlet head is in positioning contact with the joint of the cold plate, and the positioning is achieved through the third positioning boss, the sealing ring is arranged between the joint of the air inlet head and the cold plate, and is limited by the limit ring, the rubber pad and the clamping steel plate are assembled between the other end of the C-frame and the joint of the cold plate, and are squeezed in contact; the airtight joint is in positioning contact with the air inlet head, sealed by argon arc welding, and high-pressure gas enters the inner cavity of the cold plate through the airtight joint.

[0008] When in use, the two sets of the air tightness detection devices are respectively arranged on the two joints of the cold plate, the airtight joints of one set of the air tightness detection devices are sealed with an airtight plug, and the airtight joints of the other set of the air tightness detection devices are connected to the equipment to carry out air tightness detection test.

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

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

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

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

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

[0014] Furthermore, the rotating rod is deformed.

[0015] Furthermore, the bearing is a thrust ball bearing and needs to be greased before use.

[0016] Furthermore, after being tightened, the rotating pressure rod and the outer sleeve nut should not be in axial contact and there should be a 0.5mm gap. At the same time, the thread rotation direction should be right-handed or consistent.

[0017] Furthermore, the rubber pad and the pressing steel plate are of the same size, the same size 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 2 mm.

[0018] The beneficial effects of this application are:

[0019] The cold plate air tightness detection device effectively realizes the sealing of the joint end, has a simple structure, is easy to operate, has good stability, high reliability, and can be quickly replaced, which is conducive to the mass production of cold plates and improves production efficiency; thereby ensuring the quality of cold plate brazing. At the same time, during the tightening force application process, the rolling friction of the bearing replaces the rotational sliding friction. When the clamping force is applied to the end face of the joint, the rotational torque of the joint is greatly reduced, which can prevent the joint from twisting and deformation and scratching the end face of the joint, effectively ensuring the production quality of the cold plate, delivering it to customers on time, and achieving customer satisfaction. In addition, the device can perform end face sealing on different joint inlet and outlet apertures by replacing air inlet heads of different sizes, thereby improving the adaptability of the air tightness detection device to cold plates of different sizes and specifications, and providing the possibility for rapid, standardized, and low-cost development of cold plates. In view of the innovative structural design of the device, it is also suitable for air tightness detection of vertical joint cold plate structures, with significant results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the airtight detection device;

[0021] Figure 2 A three-dimensional diagram of a handheld capillary bending device;

[0022] Figure 3 This is a partial enlarged view.

[0023] Among them, there are a rotating pressure rod 1, a first positioning boss 101, a tightening rod 2, a C-frame 3, a sleeve nut 4, a bearing 5, a static pressure head 6, a second positioning boss 61, an air inlet head 7, a limit ring 71, a third positioning boss 72, an anti-slip ring 73, a sealing ring 8, a joint 9, a rubber pad 10, a clamping steel plate 11, a cold plate 12, an airtight joint 13, and an airtight plug 14. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the implementation of the present invention clearer, the technical scheme in the embodiment of the present invention will be described in more detail in combination with the embodiment of the present invention. In the example, the same or similar reference numerals throughout represent the same or similar originals or elements with the same or similar functions. The described embodiments are part of the embodiments of the present invention, not all of them. The embodiments described below by reference are exemplary and intended to be used to explain the present invention, and should not be construed as limitations on the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work belong to the scope of protection of the present invention. The following is a detailed description in combination with the embodiments of the present invention.

[0025] A device for detecting air tightness of an oversized cold plate, comprising a rotating pressure rod 1, a first positioning boss 101, a tightening rod 2, a C-frame 3, a sleeve nut 4, a bearing 5, a static pressure head 6, a second positioning boss 61, an air inlet head 7, a limit ring 71, a third positioning boss 72, an anti-slip ring 73, a sealing ring 8, a rubber pad 10, a clamping steel plate 11, and an airtight joint 13; the rotating pressure rod 1 is provided with a first positioning boss 101 and an external thread, one end of the C-frame 3 is provided with an internal thread, and the rotating pressure rod 1 is threadedly screwed to the C-frame 3; the tightening rod 2 passes through the through hole on the rotating pressure rod 1; the bearing 5 is respectively in contact with 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 located between the first positioning boss 101 and the second positioning boss 61; the second positioning boss 61 is plugged into the loose ring on the bearing 5, and the first positioning boss 101 is plugged into the tightening ring on the bearing 5; the outer sleeve nut 4 is threadedly screwed into the static pressure head 6; a limiting ring 71, a third positioning boss 72, and an anti-slip ring 73 are provided on the air inlet head 7; one end of the air inlet head 7 is in contact with the static pressure head 6, and the anti-slip ring 73 on the air inlet head 7 prevents uneven force on the contact surface between the air inlet head 7 and the static pressure head 6; the other end of the air inlet head 7 is positioned in contact with the joint 9 of the cold plate 12, and is positioned by the third positioning boss 72, the sealing ring 8 is arranged between the air inlet head 7 and the joint 9 of the cold plate 12, and is limited by the limiting ring 71, the rubber pad 10 and the clamping steel plate 11 are assembled between the other end of the C-frame 3 and the joint 9 of the cold plate 12, and are squeezed in contact; the airtight joint 13 is positioned in contact with the air inlet head 7, sealed by argon arc welding, and high-pressure gas enters the inner cavity of the cold plate 12 through the airtight joint 13.

[0026] When in use, the two sets of the air tightness detection devices are respectively arranged on the two joints 9 of the cold plate 12, the airtight joints 13 of one set of the air tightness detection devices are sealed with an airtight plug 14, and the airtight joints 13 of the other set of the air tightness detection devices are connected to the equipment to carry out air tightness detection test.

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

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

[0029] In a possible embodiment, the diameter of the third positioning boss 72 should be 0.2 mm smaller than the inner diameter of the joint 9. (Small clearance positioning can be achieved, and a small amount of shaking is allowed)

[0030] In a possible embodiment, the height of the stop ring 71 should be greater than 1.5 mm, and at the same time, the distance between the sealing surface of the joint 9 and the axial end surface of the stop ring 71 should be 1 mm. Because in this embodiment, the sealing ring 8 is 3 mm, the height of the stop ring 71 should be less than the height of the sealing ring 8 to reserve compression space.

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

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

[0033] In a possible embodiment, the bearing 5 is a thrust ball bearing, which needs to be greased before use.

[0034] In a possible embodiment, after being tightened, the rotating pressure rod 1 and the outer sleeve nut 4 should not be in axial contact and there should be a gap of 0.5 mm. At the same time, the thread rotation direction is ensured to be right-handed or consistent.

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

[0036] It is understood by those skilled in the art that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the present invention belongs. 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 unless defined as here, will not be interpreted with idealized or overly formal meanings. The specific implementation methods described above further describe the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the present invention. Within the spirit and principle of the present invention, any technician familiar with the profession may use the above disclosed technical content to change or modify it into an equivalent embodiment of equivalent changes for application in other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the technical solution content of the present invention, any modification, equivalent replacement, improvement, etc., made according to the technical essence of the present invention, should be included in the protection scope of the present invention.

Claims

1. An oversized cold plate air tightness detection device, characterized in that: It includes a rotating pressure rod, a first positioning boss, a tightening rod, a C-frame, a sleeve nut, a bearing, a static pressure head, a second positioning boss, an air inlet head, a limit ring, a third positioning boss, an anti-slip ring, a sealing ring, a rubber pad, a clamping 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-frame is provided with an internal thread, and the rotating pressure rod is screwed and connected with the C-frame thread; the tightening rod passes through the through hole on the rotating pressure rod; the bearing is respectively in contact with the first positioning boss on the rotating pressure rod and the second positioning boss on the static pressure head, and is located between the first positioning boss and the second positioning boss; the second positioning boss is plugged into the loose ring on the bearing, and the first positioning boss is plugged into the tight ring on the bearing ; The outer sleeve nut is screwed and connected with the static pressure head; a limit ring, a third positioning boss and an anti-slip ring are arranged on the air inlet head; one end of the air inlet head is in contact with the static pressure head, and the anti-slip ring on the air inlet head prevents uneven force on the contact surface between the air inlet head and the static pressure head; the other end of the air inlet head is in positioning contact with the joint of the cold plate, and positioning is achieved through the third positioning boss; the sealing ring is arranged between the joint of the air inlet head and the cold plate, and is limited by the limit ring; the rubber pad and the clamping steel plate are assembled between the other end of the C-frame and the joint of the cold plate, and are squeezed into contact; the airtight joint is in positioning contact with the air inlet head, sealed by argon arc welding, and high-pressure gas enters the inner cavity of the cold plate through the airtight joint.

2. The device according to claim 1, characterized in that When in use, the two sets of the air tightness detection devices are respectively arranged on the two joints of the cold plate, the airtight joints of one set of the air tightness detection devices are sealed with an airtight plug, and the airtight joints of the other set of the air tightness detection devices are connected to the equipment to carry out air tightness detection test.

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

4. The device according to claim 3, characterized in that The sealing ring and rubber pad are made of rubber.

5. The device according to claim 4, characterized in that The diameter of the third positioning boss should be 0.2 mm smaller than the inner hole diameter of the joint.

6. The device according to claim 5, characterized in that The height of the limiting ring should be greater than 1.5 mm, and at the same time, the distance between the joint sealing surface and the axial end surface of the limiting ring 71 should be 1 mm.

7. The device according to claim 6, characterized in that The height of the anti-slip ring should be greater than 1 mm; the rotating rod is deformed.

8. The device according to claim 7, characterized in that The bearing is a thrust ball bearing and needs to be greased before use.

9. The device according to claim 8, characterized in that After being tightened, the rotating pressure rod and the outer sleeve nut should not be in axial contact and there should be a 0.5mm gap; at the same time, the thread rotation direction should be right-handed or consistent.

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

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