A pressure testing device for stainless steel heat exchange tubes

Abstract

The present invention relates to the technical field of stainless steel heat exchanger processing, specifically a pressure test device for stainless steel heat exchange tubes, including a conveying mechanism, a lifting mechanism and a sorting slot, a fixed block on the sorting slot, a transmission shaft in the fixed block, a pressure test frame on the transmission shaft, the pressure test frame including a hexagonal rotating plate, a cross bar and a pull rod, and an electric telescopic rod, an electromagnetic adsorption plate and a sealing rubber pad on the transmission shaft. The present invention lifts a single heat exchange tube to the top of the pressure test frame through a lifting mechanism, and slides it between two cross bars, the electromagnetic adsorption plate adsorbs the heat exchange tube, and then the two ends of the heat exchange tube are blocked by the electric telescopic rod and the sealing rubber pad, and the inflation pressure test is performed, and the unqualified heat exchange tube will fall into the sorting slot through the rotation of the transmission shaft, and vice versa, it will be sent to the discharge guide rail through the action of the electromagnetic adsorption plate. The single pressure test method does not require the step-by-step feeding of the feeding mechanism, which can prevent missed inspections on the one hand, and reduce the difficulty of operating the pressure test equipment on the other hand.

Description

Technical Field

[0001] The invention relates to a pressure testing device, in particular to a pressure testing device used for a stainless steel heat exchange tube, and belongs to the technical field of stainless steel heat exchanger processing. Background Art

[0002] Stainless steel heat exchanger is a kind of heat exchange equipment widely used in industrial and civil fields. It can maintain stable performance in various harsh working environments, is not easily corroded by chemical substances, and has high strength and good mechanical properties, which ensures the normal operation of the heat exchanger under high pressure and high temperature conditions. Because of these excellent properties, stainless steel heat exchangers play an important role in many fields. During the processing of stainless steel heat exchangers, the heat exchange tubes need to be pressure tested, so a pressure test equipment is required.

[0003] According to the heat exchange tube pressure testing device disclosed in the Chinese patent document with the announcement number CN114993577A, the heat exchange tubes 7 are divided into multiple groups and placed side by side on the conveying mechanism 6, and several placement positions for heat exchange tubes can be vacated between each group of heat exchange tubes (or the placement positions may not be vacated, which can be determined according to production needs). The driving mechanism drives the heat exchange tubes to translate along their radial direction, that is, to translate on the driving plane of the driving mechanism. The detection mechanism is arranged on both sides of the conveying mechanism (that is, located at both ends of the heat exchange tubes), and the ends of a group of heat exchange tubes located at the detection position can be inserted at the same time to measure the air pressure.

[0004] Based on the search of the above patents and in combination with the equipment in the prior art, it is found that when the above equipment is used, it is necessary to push the groups of heat exchange tubes into the detection mechanism 4 for detection through the semicircular grooves on the chain. At this time, the conveying mechanism needs to stop working, and when a few placement positions of heat exchange tubes are vacated between each group of heat exchange tubes, the step transmission distance of the feeding mechanism also needs to be adjusted, otherwise there may be problems of missed detection, and the feeding mechanism will inevitably have insufficient remaining material. Therefore, the step transmission distance of the feeding mechanism needs to be adjusted in real time, which not only increases the difficulty of operating the heat exchange tube pressure testing device, but also may cause missed detection due to untimely adjustment.

[0005] Therefore, there is an urgent need to improve the pressure testing equipment used for stainless steel heat exchange tubes to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a pressure testing device for stainless steel heat exchange tubes, which can lift a single heat exchange tube to the top of the pressure testing frame through a conveying mechanism and a lifting mechanism, and slide it between two cross bars. The electromagnetic adsorption plate adsorbs the heat exchange tube, and then the two ends of the heat exchange tube are sealed by an electric telescopic rod and a sealing pad, and an inflation pressure test is performed. Unqualified heat exchange tubes will fall into the sorting trough through the rotation of the transmission shaft, and conversely, they will be transported to the discharge guide rail for delivery through the action of the electromagnetic adsorption plate. The single-tube pressure testing method does not require step-by-step feeding of the feeding mechanism, which can prevent missed inspections on the one hand, and reduce the difficulty of operating the pressure testing equipment on the other hand.

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] A pressure test device for a stainless steel heat exchange tube, comprising a conveying mechanism, a lifting mechanism is fixedly installed at the output end of the conveying mechanism, a sorting slot is fixedly installed at one end of the lifting mechanism away from the conveying mechanism, fixed blocks are fixedly installed on both sides of the upper end of the sorting slot, a transmission shaft is rotatably arranged inside the fixed block, the transmission shaft passes through two fixed blocks and extends to the outside of the sorting slot, and a pressure test frame is fixedly installed on the transmission shaft;

[0009] The pressure test frame includes two hexagonal rotating plates, six cross bars are fixedly installed between the two hexagonal rotating plates, a number of pull rods are fixedly installed between the cross bars and the transmission shaft, six uniform electric telescopic rods are fixedly arranged on the transmission shaft, and the output end of the electric telescopic rod is connected to the external booster mechanism, six uniformly distributed electromagnetic adsorption plates are fixedly installed on the inner side of one of the hexagonal rotating plates, and a sealing rubber pad is fixedly installed on one side of the other hexagonal rotating plate corresponding to the electromagnetic adsorption plate, and the electric telescopic rod, the electromagnetic adsorption plate and the sealing rubber pad are all arranged between two adjacent cross bars, and correspond to each other one by one;

[0010] A discharging guide rail is fixedly mounted on a side of the sorting trough away from the lifting mechanism, and the discharging guide rail extends into the interior of the sorting trough and extends to the bottom of the pressure test frame.

[0011] Preferably, a driving motor is fixedly installed on one side of the sorting slot, a coupling is fixedly installed on the output end of the driving motor, one end of the transmission shaft extends to the interior of the coupling, the driving motor is used to drive the transmission shaft to rotate through the coupling, and the sealing rubber pad is arranged on the hexagonal rotating plate away from the driving motor.

[0012] Preferably, a first slide groove is opened on the inner side of the fixed block close to the driving motor, a guide rib is fixedly installed inside the first slide groove, a group of first C-shaped electrode plates are fixedly arranged on the inner side of the first slide groove, a group of second C-shaped electrode plates are fixedly arranged on the outer side of the guide rib, the first C-shaped electrode plates and the second C-shaped electrode plates are distributed in opposite directions, a ring is fixedly installed on the side of the hexagonal rotating plate corresponding to the first slide groove, a number of evenly distributed U-shaped sliders are fixedly arranged on the ring, the U-shaped slider is slidably arranged inside the first slide groove, a group of first electrode sheets are fixedly arranged on the outer side of the U-shaped slider, and a group of second electrode sheets are fixedly arranged on the inner side of the U-shaped slider.

[0013] Preferably, the first electrode sheet corresponds to the first C-shaped electrode plate, and the first electrode sheet is electrically connected to the positive and negative poles of the electric telescopic rod and the electromagnetic adsorption plate through a wire, the second electrode sheet corresponds to the second C-shaped electrode plate, and the second electrode sheet is electrically connected to the positive and negative poles of the electric telescopic rod through a wire, the first C-shaped electrode plate and the second C-shaped electrode plate are connected in parallel in the power supply circuit of the electric telescopic rod, and the first C-shaped electrode plate and the second C-shaped electrode plate have opposite current transmission directions to the electric telescopic rod.

[0014] Preferably, the hexagonal rotating plate is provided with six evenly distributed holes and grooves corresponding to the positions of the sealing rubber pad, a piston is slidably arranged inside the holes and grooves, one side of the piston is abutted against one side of the sealing rubber pad, a side of the piston away from the sealing rubber pad is fixedly connected to a spring, and the piston is fixedly provided with a conductive column on the inner side of the spring.

[0015] Preferably, a second slide groove is provided on the fixed block near the sealing rubber pad, and a circular electrode plate is fixedly installed on the inner side of the second slide groove. During the sliding process of the piston, the conductive column penetrates the hexagonal rotating plate and extends to the inside of the second slide groove to contact the circular electrode plate. The conductive column and the circular electrode plate are both connected in series in the power circuit of the electromagnetic adsorption plate through wires.

[0016] Preferably, an arc-shaped clamping plate is fixedly provided on the bottom side of the second slide groove, the central angle of the arc-shaped clamping plate is 60 degrees, and a clamping slot is opened on the conductive column, and the clamping slot corresponds to the arc-shaped clamping plate.

[0017] Preferably, a roller motor is fixedly installed inside the conveying mechanism, a conveyor belt is rotatably provided on the roller motor, a material guide plate is fixedly installed on the lifting mechanism at a position corresponding to the conveyor belt, and the material guide plate extends to the top of the pressure test frame.

[0018] Preferably, a plurality of evenly distributed material blocking plates are fixedly mounted on the lifting mechanism, a sliding plate is vertically slidably arranged inside the lifting mechanism, a plurality of evenly distributed material pushing plates are fixedly mounted on the sliding plate, and the material pushing plates and the material blocking plates are staggered.

[0019] Preferably, a feeding motor is fixedly mounted on the outer side of the lifting mechanism, and a rotating rod is fixedly mounted on the output end of the feeding motor. The rotating rod passes through the lifting mechanism and extends to the other side of the lifting mechanism. A plurality of evenly distributed elliptical wheels are fixedly mounted on the rotating rod, and the side surfaces of the elliptical wheels are in contact with the bottom side of the sliding plate.

[0020] The present invention has at least the following beneficial effects:

[0021] The present invention lifts a single heat exchange tube to the top of the pressure test frame through a lifting mechanism and slides it between two cross bars. The electromagnetic adsorption plate adsorbs the heat exchange tube, and then the two ends of the heat exchange tube are sealed by an electric telescopic rod and a sealing rubber pad, and an inflation pressure test is performed. Unqualified heat exchange tubes will fall into the sorting trough through the rotation of the transmission shaft, and conversely will be transmitted to the discharge guide rail for delivery through the action of the electromagnetic adsorption plate. The single pressure test method does not require step-by-step feeding of a feeding mechanism, which can prevent missed inspections on the one hand, and reduce the difficulty of operating the pressure test equipment on the other hand.

[0022] The cross bar of the present invention can make the rotation of the two hexagonal rotating plates more stable, and the pull rod further improves the stability of the pressure test frame following the rotation of the transmission shaft, and can divide the pressure test frame into six independent detection spaces, avoiding the mutual influence when multiple heat exchange tubes are detected at the same time, and also reduces the load of the boosting mechanism, thereby improving the accuracy of the pressure test.

[0023] When the present invention is used, unqualified heat exchange tubes will leak during inflation, and the air pressure inside them will be insufficient to cause the sealing rubber pad to produce a certain deformation, so it is insufficient to push the conductive column to the position in contact with the circular electrode plate. Then the bayonet cannot reach the determined position and hold the arc-shaped clamping plate, but will touch the conductive column to reset the piston. Therefore, the unqualified heat exchange tubes will fall at the bottom, and the qualified heat exchange tubes will pass the bottom, which is more efficient and convenient than manual sorting.

[0024] The feeding motor of the present invention is used to drive the sliding plate to rise or fall at a uniform speed during the rotation of the elliptical wheel, and the combination of the pushing plate and the blocking plate realizes the effect of gradually lifting a single heat exchange tube. The feeding motor can cooperate with the driving motor to continuously feed and test pressure, which greatly improves the continuity of production of stainless steel heat exchanger processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0026] Figure 1 A schematic diagram of the three-dimensional structure provided by the present invention;

[0027] Figure 2 A cross-sectional elevation view of a conveying mechanism and a lifting mechanism provided by the present invention;

[0028] Figure 3 A schematic diagram of the structure of the sorting slot provided by the present invention;

[0029] Figure 4 A cross-sectional elevation view of a fixing block, a transmission shaft and a pressure test frame provided by the present invention;

[0030] Figure 5 A schematic cross-sectional view of a pressure test frame and a sorting slot provided by the present invention;

[0031] Figure 6 A vertical view of the ring structure provided by the present invention;

[0032] Figure 7 A schematic diagram of the working state of the U-shaped slider provided by the present invention;

[0033] Figure 8 A schematic diagram of the working of the piston provided by the present invention;

[0034] Fig. 9 A circuit diagram provided by the present invention.

[0035] In the figure, 1, conveying mechanism; 2, lifting mechanism; 3, sorting slot; 31, driving motor; 32, coupling; 4, fixing block; 410, first slide slot; 411, guide rib; 412, first C-type electrode plate; 413, second C-type electrode plate; 420, second slide slot; 421, circular electrode plate; 422, arc-shaped card plate; 5, transmission shaft; 6, pressure test frame; 61, hexagonal rotating plate; 62, cross bar; 63, pull rod; 64, collar; 641 , U-shaped slider; 642, first electrode sheet; 643, second electrode sheet; 65, hole groove; 651, piston; 652, spring; 653, conductive column; 654, bayonet; 7, electric telescopic rod; 8, electromagnetic adsorption plate; 9, sealing rubber pad; 10, discharge guide rail; 12, roller motor; 13, conveyor belt; 21, guide plate; 22, blocking plate; 23, sliding plate; 24, pushing plate; 25, feeding motor; 26, rotating rod; 27, elliptical wheel. DETAILED DESCRIPTION

[0036] The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0037] like Figure 1 - Fig. 9 As shown, the pressure test equipment for stainless steel heat exchange tubes provided in this embodiment includes a conveying mechanism 1, a lifting mechanism 2 is fixedly installed at the output end of the conveying mechanism 1, the conveying mechanism 1 is used to convey the heat exchange tube to the inlet of the lifting mechanism 2, and a sorting slot 3 is fixedly installed at one end of the lifting mechanism 2 away from the conveying mechanism 1, and fixed blocks 4 are fixedly arranged on both sides of the upper end of the sorting slot 3. A transmission shaft 5 is rotatably arranged inside the fixed block 4. The sorting slot 3 and the fixed block 4 are used to fix the two ends of the transmission shaft 5. The transmission shaft 5 passes through the two fixed blocks 4 and extends to the outside of the sorting slot 3. A pressure test frame 6 is fixedly installed on the transmission shaft 5, and the lifting mechanism 2 can push a single heat exchange tube to the upper end of the pressure test frame 6;

[0038] The pressure test frame 6 includes two hexagonal rotating plates 61, six cross bars 62 are fixedly installed between the two hexagonal rotating plates 61, a number of pull rods 63 are fixedly installed between the cross bars 62 and the transmission shaft 5, six uniform electric telescopic rods 7 are fixedly arranged on the transmission shaft 5, and the output end of the electric telescopic rod 7 is connected to the external booster mechanism. Six uniformly distributed electromagnetic adsorption plates 8 are fixedly installed on the inner side of one of the hexagonal rotating plates 61, and a sealing rubber pad 9 is fixedly installed on one side of the other hexagonal rotating plate 61 corresponding to the electromagnetic adsorption plate 8. The electric telescopic rod 7, the electromagnetic adsorption plate 8 and the sealing rubber pad 9 are all It is arranged between two adjacent cross bars 62 and corresponds to each other one by one. A discharge guide rail 10 is fixedly installed on the side of the sorting slot 3 away from the lifting mechanism 2. The discharge guide rail 10 extends to the inside of the sorting slot 3 and extends to the bottom of the pressure test frame 6; a single heat exchange tube is pushed to the upper end of the pressure test frame 6 and falls between two adjacent cross bars 62 through the guide plate 21 and is adsorbed by the electromagnetic adsorption plate 8. At this time, the electric telescopic rod 7 works with the sealing rubber pad 9 to seal the two ends of the heat exchange tube, and then the pressure test is performed by inflating through the booster mechanism. The booster mechanism is a prior art and will not be described in detail here;

[0039] Among them, a single heat exchange tube is lifted to the top of the pressure test frame 6 by the conveying mechanism 1 and the lifting mechanism 2, and slides between the two cross bars 62. The electromagnetic adsorption plate 8 adsorbs the heat exchange tube, and then the two ends of the heat exchange tube are sealed by the electric telescopic rod 7 and the sealing rubber pad 9, and the inflation pressure test is performed. Unqualified heat exchange tubes will fall into the sorting slot 3 through the rotation of the transmission shaft 5, and conversely, they will be transmitted to the discharge guide rail 10 for delivery through the action of the electromagnetic adsorption plate 8. The single pressure test method does not require the step-by-step feeding of the lifting mechanism 2, which can not only prevent missed inspections, but also greatly reduce the difficulty of operating the pressure test equipment.

[0040] Further, such as Figure 1 - Fig. 9 As shown, a driving motor 31 is fixedly installed on one side of the sorting slot 3, and a coupling 32 is fixedly installed on the output end of the driving motor 31. One end of the transmission shaft 5 extends to the inside of the coupling 32. The driving motor 31 is used to drive the transmission shaft 5 to rotate through the coupling 32. The sealing rubber pad 9 is arranged on the hexagonal rotating plate 61 away from the driving motor 31; the cross bar 62 can make the rotation of the two hexagonal rotating plates 61 more stable, and the pull rod 63 further improves the stability of the pressure test frame 6 following the rotation of the transmission shaft 5, and can divide the pressure test frame 6 into six independent detection spaces, avoiding the mutual influence when multiple heat exchange tubes are detected at the same time, and also reducing the load of the booster mechanism, thereby improving the accuracy of the pressure test.

[0041] Furthermore, Figure 1 - Fig. 9 As shown, a first slide groove 410 is provided on the inner side of the fixed block 4 close to the driving motor 31, a guide rib 411 is fixedly installed inside the first slide groove 410, a group of first C-shaped electrode plates 412 are fixedly installed on the inner side of the first slide groove 410, a group of second C-shaped electrode plates 413 are fixedly installed on the outer side of the guide rib 411, the first C-shaped electrode plates 412 and the second C-shaped electrode plates 413 are distributed in opposite directions, a collar 64 is fixedly installed on one side of the hexagonal rotating plate 61 corresponding to the first slide groove 410, a plurality of evenly distributed U-shaped sliders 641 are fixedly installed on the collar 64, the U-shaped slider 641 is slidably arranged inside the first slide groove 410, a group of first electrode sheets 642 are fixedly arranged on the outer side of the U-shaped slider 641, and a group of second electrode sheets 643 are fixedly arranged on the inner side of the U-shaped slider 641;

[0042] At the same time, if Figure 1 - Fig. 9 As shown, the first electrode sheet 642 corresponds to the first C-shaped electrode plate 412, and the first electrode sheet 642 is electrically connected to the positive and negative poles of the electric telescopic rod 7 and the electromagnetic adsorption plate 8 through a wire, the second electrode sheet 643 corresponds to the second C-shaped electrode plate 413, and the second electrode sheet 643 is electrically connected to the positive and negative poles of the electric telescopic rod 7 through a wire, the first C-shaped electrode plate 412 and the second C-shaped electrode plate 413 are connected in parallel in the power supply circuit of the electric telescopic rod 7, and the first C-shaped electrode plate 412 and the second C-shaped electrode plate 413 have opposite current transmission directions to the electric telescopic rod 7;

[0043] Among them, when the electric telescopic rod 7 rotates to the uppermost end following the pressure test frame 6, the first electrode sheet 642 contacts the first C-type electrode plate 412, and the electric telescopic rod 7 and the electromagnetic adsorption plate 8 are energized. The electromagnetic adsorption plate 8 adsorbs the heat exchange tube dropped from the guide plate 21. At the same time, the electric telescopic rod 7 works to seal the two ends of the heat exchange tube and conducts a pressure test. When this group of electric telescopic rods 7 and the electromagnetic adsorption plate 8 rotate to the bottom end, the second electrode sheet 643 contacts the second C-type electrode plate 413, and the electric telescopic rod 7 is retracted by changing the current transmission direction of the electric telescopic rod 7. The electromagnetic adsorption plate 8 will also be powered off, and unqualified heat exchange tubes will also fall from the bottom to the inside of the sorting slot 3.

[0044] Further, if Figure 1 - Fig. 9 As shown, six evenly distributed holes 65 are provided at the positions of the hexagonal rotating plate 61 corresponding to the sealing rubber pad 9, and a piston 651 is slidably provided inside the hole 65, one side of the piston 651 is against one side of the sealing rubber pad 9, and a spring 652 is fixedly connected to the side of the piston 651 away from the sealing rubber pad 9, and the spring 652 is used to reset the piston 651, and a conductive column 653 is fixedly provided on the inner side of the spring 652 of the piston 651, and a second slide groove 420 is provided on the fixed block 4 close to the sealing rubber pad 9, and a circular electrode plate 421 is fixedly installed on the inner side of the second slide groove 420. During the sliding process of the piston 651, the conductive column 653 penetrates the hexagonal rotating plate 61 and extends to the inside of the second slide groove 420 to contact the circular electrode plate 421, and the conductive column 653 and the circular electrode plate 421 are both connected in series to the power supply circuit of the electromagnetic adsorption plate 8 through a wire;

[0045] Among them, during the process of the booster mechanism inflating the inside of the heat exchange tube, the air pressure inside the heat exchange tube gradually increases, and the sealing gasket 9 will be slightly deformed to push the piston 651 to slide inside the hole groove 65. If the heat exchange tube is qualified, then in the process of it rotating from the top to the bottom, the conductive column 653 will pass through the hole groove 65 into the second slide groove 420 and contact the circular electrode plate 421. At this time, the second electrode plate 643 is in contact with the second C-type electrode plate 413, and the current transmission direction of the electric telescopic rod 7 is changed to retract the electromagnetic adsorption plate 8 to cut off the power. However, the contact between the conductive column 653 and the circular electrode plate 421 will make the circuit of the electromagnetic adsorption plate 8 connected again to generate magnetism. The electromagnetic adsorption plate 8 adsorbs the qualified heat exchange tube over the bottom end of the transmission shaft and sends it into the discharge guide rail 10 for discharge.

[0046] In order to solve the problem of the sealing pad 9 being reset when the electric telescopic rod 7 is retracted:

[0047] like Figure 1 - Fig. 9As shown, an arc-shaped clamping plate 422 is fixedly provided on the bottom side of the second slide groove 420, and the central angle of the arc-shaped clamping plate 422 is 60 degrees. A bayonet 654 is provided on the conductive column 653, and the bayonet 654 corresponds to the arc-shaped clamping plate 422. When the sealing rubber pad 9 pushes the piston 651 to slide inside the hole groove 65, the conductive column 653 contacts the circular electrode plate 421, and the bayonet 654 contacts the arc-shaped clamping plate 422 before the heat exchange tube rotates to the bottom. Therefore, after the heat exchange tube rotates to the bottom, the bayonet 654 is engaged with the arc-shaped clamping plate 422. Even if the electric telescopic rod 7 retracts, the conductive column 653 will still contact the circular electrode plate 421, so that the electromagnetic adsorption plate 8 works. Until the cross bar 62 is docked with the discharge guide rail 10, the bayonet 654 is separated from the arc-shaped clamping plate 422 under the action of the spring 652 and the air pressure in the hole groove 65, and the electromagnetic adsorption plate 8 is completely powered off.

[0048] Specifically, an unqualified heat exchange tube will leak when inflated, and the air pressure inside it is not enough to cause a certain deformation of the sealing gasket 9, and therefore is not enough to push the conductive column 653 to a position in contact with the circular electrode plate 421. Then the bayonet 654 cannot reach a determined position and clamp the arc-shaped clamping plate 422, but will touch the conductive column 653 to reset the piston 651. Therefore, the unqualified heat exchange tube will fall to the bottom, and the qualified heat exchange tube will pass the bottom.

[0049] Furthermore, if Figure 1 - Fig. 9 As shown, a roller motor 12 is fixedly installed inside the conveying mechanism 1, and a conveyor belt 13 is rotatably arranged on the roller motor 12. A guide plate 21 is fixedly arranged on the upper end of the lifting mechanism 2, and the guide plate 21 extends to the top of the pressure test frame 6. A plurality of evenly distributed blocking plates 22 are fixedly installed on the lifting mechanism 2. A sliding plate 23 is vertically slidably arranged inside the lifting mechanism 2, and a plurality of evenly distributed pushing plates 24 are fixedly installed on the sliding plate 23. The pushing plates 24 and the blocking plates 22 are staggered. The pushing plates 24 are used to push a single heat exchange tube to rise. The pushing plates 24 rise to a position flush with or slightly higher than the blocking plates 22, and the heat exchange tube falls onto the upper blocking plates 22, so that the single heat exchange tube is lifted step by step.

[0050] In addition, if Figure 1 - Fig. 9As shown, a feeding motor 25 is fixedly installed on the outer side of the lifting mechanism 2, and a rotating rod 26 is fixedly installed on the output end of the feeding motor 25. The rotating rod 26 penetrates the lifting mechanism 2 and extends to the other side of the lifting mechanism 2. A number of evenly distributed elliptical wheels 27 are fixedly installed on the rotating rod 26. The side of the elliptical wheel 27 contacts the bottom side of the sliding plate 23. The feeding motor 25 is used to drive the elliptical wheel 27 to rotate. During the rotation of the elliptical wheel 27, the sliding plate 23 is raised or lowered at a uniform speed, and the effect of step-by-step lifting of a single heat exchange tube is achieved through the combination of the pushing plate 24 and the blocking plate 22. The feeding motor 25 can cooperate with the driving motor 31 to provide uninterrupted feeding and pressure testing, which greatly improves the continuity of production of stainless steel heat exchanger processing.

[0051] like Figure 1 - Fig. 9 As shown, the principle of a pressure test device for stainless steel heat exchange tubes provided in this embodiment is as follows:

[0052] The heat exchange tube is placed on the conveying mechanism 1. The feeding motor 25 drives the sliding plate 23 to rise or fall at a uniform speed through the elliptical wheel 27, and the combination of the pushing plate 24 and the blocking plate 22 realizes the effect of step-by-step lifting of a single heat exchange tube. The feeding motor 25 can cooperate with the driving motor 31 to continuously feed and test the pressure. The heat exchange tube slides between the two cross bars 62 through the guide plate 21, and the electromagnetic adsorption plate 8 adsorbs the heat exchange tube, and then the two ends of the heat exchange tube are blocked by the electric telescopic rod 7 and the sealing rubber pad 9. , and perform inflation pressure test. Unqualified heat exchange tubes will leak when inflated, and the air pressure inside them is not enough to cause a certain deformation of the sealing gasket 9, so it is not enough to push the conductive column 653 to the position in contact with the circular electrode plate 421, and then the bayonet 654 cannot reach the determined position and hold the arc-shaped clamping plate 422, but will touch the conductive column 653 to reset the piston 651. Therefore, the unqualified heat exchange tubes will fall at the bottom, and the qualified heat exchange tubes will pass the bottom to complete the sorting.

[0053] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0054] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0055] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A pressure testing device for a stainless steel heat exchange tube, comprising a conveying mechanism (1), characterized in that: A lifting mechanism (2) is fixedly mounted on the output end of the conveying mechanism (1); a sorting slot (3) is fixedly mounted on one end of the lifting mechanism (2) away from the conveying mechanism (1); fixed blocks (4) are fixedly mounted on both sides of the upper end of the sorting slot (3); a transmission shaft (5) is rotatably mounted inside the fixed block (4); the transmission shaft (5) passes through the two fixed blocks (4) and extends to the outside of the sorting slot (3); a pressure test frame (6) is fixedly mounted on the transmission shaft (5); The pressure test frame (6) comprises two hexagonal rotating plates (61), six cross bars (62) are fixedly installed between the two hexagonal rotating plates (61), a plurality of pull rods (63) are fixedly installed between the cross bars (62) and the transmission shaft (5), six uniform electric telescopic rods (7) are fixedly arranged on the transmission shaft (5), and the output end of the electric telescopic rod (7) is connected to an external boost mechanism, six uniformly distributed electromagnetic adsorption plates (8) are fixedly installed on the inner side of one of the hexagonal rotating plates (61), and a sealing rubber pad (9) is fixedly installed on the side of the other hexagonal rotating plate (61) corresponding to the electromagnetic adsorption plate (8), and the electric telescopic rod (7), the electromagnetic adsorption plate (8) and the sealing rubber pad (9) are all arranged between two adjacent cross bars (62) and correspond to each other one by one; A discharge guide rail (10) is fixedly mounted on a side of the sorting trough (3) away from the lifting mechanism (2), and the discharge guide rail (10) extends into the interior of the sorting trough (3) and extends to below the pressure test frame (6).

2. The pressure test equipment for stainless steel heat exchange tubes according to claim 1, characterized in that: A drive motor (31) is fixedly mounted on one side of the sorting slot (3); a coupling (32) is fixedly mounted on the output end of the drive motor (31); one end of the transmission shaft (5) extends into the interior of the coupling (32); the drive motor (31) is used to drive the transmission shaft (5) to rotate via the coupling (32); and the sealing rubber pad (9) is arranged on the hexagonal rotating plate (61) away from the drive motor (31).

3. The pressure test equipment for stainless steel heat exchange tubes according to claim 2, characterized in that: A first slide groove (410) is provided on the inner side of the fixed block (4) near the drive motor (31), a guide rib (411) is fixedly installed inside the first slide groove (410), a group of first C-shaped electrode plates (412) are fixedly installed on the inner side of the first slide groove (410), a group of second C-shaped electrode plates (413) are fixedly installed on the outer side of the guide rib (411), and the first C-shaped electrode plates (412) and the second C-shaped electrode plates (413) are distributed in opposite directions. A collar (64) is fixedly installed on one side of the hexagonal rotating plate (61) corresponding to the first slide groove (410), and a plurality of evenly distributed U-shaped sliders (641) are fixedly installed on the collar (64), and the U-shaped slider (641) is slidably arranged inside the first slide groove (410), a group of first electrode sheets (642) are fixedly installed on the outer side of the U-shaped slider (641), and a group of second electrode sheets (643) are fixedly installed on the inner side of the U-shaped slider (641).

4. The pressure test equipment for stainless steel heat exchange tubes according to claim 3, characterized in that: The first electrode sheet (642) corresponds to the first C-shaped electrode plate (412), and the first electrode sheet (642) is electrically connected to the positive and negative poles of the electric telescopic rod (7) and the electromagnetic adsorption plate (8) through a wire; the second electrode sheet (643) corresponds to the second C-shaped electrode plate (413), and the second electrode sheet (643) is electrically connected to the positive and negative poles of the electric telescopic rod (7) through a wire; the first C-shaped electrode plate (412) and the second C-shaped electrode plate (413) are connected in parallel to the power supply circuit of the electric telescopic rod (7), and the first C-shaped electrode plate (412) and the second C-shaped electrode plate (413) transmit current to the electric telescopic rod (7) in opposite directions.

5. The pressure testing equipment for stainless steel heat exchange tubes according to claim 4, characterized in that: The hexagonal rotating plate (61) is provided with six evenly distributed holes (65) at positions corresponding to the sealing rubber pad (9), a piston (651) is slidably arranged inside the hole (65), one side of the piston (651) is in contact with one side of the sealing rubber pad (9), a spring (652) is fixedly connected to the side of the piston (651) away from the sealing rubber pad (9), and a conductive column (653) is fixedly arranged on the inner side of the spring (652) of the piston (651).

6. The pressure test equipment for stainless steel heat exchange tubes according to claim 5, characterized in that: A second slide groove (420) is provided on the fixed block (4) near the sealing pad (9), and a circular electrode plate (421) is fixedly installed on the inner side of the second slide groove (420). During the sliding of the piston (651), the conductive column (653) penetrates the hexagonal rotating plate (61) and extends to the inside of the second slide groove (420) to contact the circular electrode plate (421). The conductive column (653) and the circular electrode plate (421) are both connected in series to the power circuit of the electromagnetic adsorption plate (8) through a wire.

7. The pressure testing equipment for stainless steel heat exchange tubes according to claim 6, characterized in that: An arc-shaped clamping plate (422) is fixedly provided on the bottom side of the second sliding groove (420), and the central angle of the arc-shaped clamping plate (422) is 60 degrees. A clamping opening (654) is provided on the conductive column (653), and the clamping opening (654) corresponds to the arc-shaped clamping plate (422).

8. The pressure testing equipment for stainless steel heat exchange tubes according to claim 1, characterized in that: A roller motor (12) is fixedly mounted inside the conveying mechanism (1), a conveyor belt (13) is rotatably mounted on the roller motor (12), a material guide plate (21) is fixedly mounted on the lifting mechanism (2) at a position corresponding to the conveyor belt (13), and the material guide plate (21) extends to the top of the pressure test frame (6).

9. The pressure testing equipment for stainless steel heat exchange tubes according to claim 1, characterized in that: A plurality of evenly distributed blocking plates (22) are fixedly mounted on the lifting mechanism (2), a sliding plate (23) is vertically slidably arranged inside the lifting mechanism (2), a plurality of evenly distributed pushing plates (24) are fixedly mounted on the sliding plate (23), and the pushing plates (24) and the blocking plates (22) are arranged in an alternating manner.

10. The pressure testing equipment for stainless steel heat exchange tubes according to claim 9, characterized in that: A feeding motor (25) is fixedly mounted on the outer side of the lifting mechanism (2), and a rotating rod (26) is fixedly mounted on the output end of the feeding motor (25). The rotating rod (26) passes through the lifting mechanism (2) and extends to the other side of the lifting mechanism (2). A plurality of evenly distributed elliptical wheels (27) are fixedly mounted on the rotating rod (26), and the side surfaces of the elliptical wheels (27) are in contact with the bottom side of the sliding plate (23).

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