A plate heat exchanger air tightness detection device for ship main engine

Abstract

The present invention relates to the technical field of air tightness detection of heat exchangers, and specifically proposes an air tightness detection device for a plate heat exchanger for a ship main engine, comprising: a base, a positioning mechanism and a blocking detection mechanism. The present invention cooperates with the air filling channel group in the blocking detection mechanism and the air channel conversion group, so that the air tightness performance of the four exchange channels of the heat exchanger can be uniformly detected to improve the efficiency of the air tightness detection, and when the air tightness is found to be unqualified, the four exchange channels of the heat exchanger can be detected one by one to determine the specific exchange channel where the leakage occurs, which greatly improves the convenience of the air tightness detection, and drives the fixed disk 1 and the fixed disk 2 to move toward the heat exchanger through the fastening and sealing drive group until the fastening and sealing drive group fastens and seals the two ends of the four exchange channels in an integrated manner, thereby improving the efficiency of the exchange channel sealing, and further improving the efficiency of the air tightness detection.

Description

Technical Field

[0001] The invention relates to the technical field of air tightness detection of heat exchangers, and specifically proposes an air tightness detection device for a plate heat exchanger used in a ship main engine. Background Art

[0002] A plate heat exchanger is a highly efficient heat exchange device consisting of a series of parallel thin metal plates. Flow channels (hereinafter collectively referred to as exchange channels) are formed between these metal plates, allowing two fluids to pass alternately. It is usually used for heat exchange between liquid and liquid or steam and liquid. Due to the advantages of high efficiency, compactness and easy maintenance, plate heat exchangers have been widely used in various thermal management systems.

[0003] Among them, in the cooling system of the ship's main engine, the plate heat exchanger is responsible for heat exchange, which usually involves high-temperature and high-pressure fluids. If the seal is poor, fluid leakage may occur, which will not only reduce the heat exchange efficiency, but may also cause damage to the equipment and even cause safety accidents; therefore, the plate heat exchanger used in the ship's main engine needs to be checked for airtightness during production.

[0004] When the air tightness performance of multiple exchange channels of a heat exchanger is tested by the traditional method, the multiple exchange channels of the heat exchanger are blocked one by one for air tightness testing. However, the air tightness performance of most exchange channels of the heat exchangers that have been produced is qualified, and the exchange channels of the heat exchangers that fail the air tightness performance are exceptions. Therefore, the efficiency of using the traditional method to block the multiple exchange channels of the heat exchanger one by one for air tightness testing is not high. Summary of the invention

[0005] In view of the above problems, an embodiment of the present application provides an air tightness detection device for a plate heat exchanger for a ship main engine to solve the technical problems in the related art.

[0006] In order to achieve the above-mentioned purpose, the embodiment of the present application provides the following technical solution: an air tightness detection device for a plate heat exchanger for a ship main engine, comprising: a base, the top of the base is provided with sliding grooves symmetrically arranged along its length direction, the top of the base is installed with an inverted L-shaped frame located between the two sliding grooves, and a positioning mechanism for positioning the heat exchanger when it is placed is jointly installed between the inverted L-shaped frame and the base.

[0007] The two sliding grooves are jointly provided with a blocking detection mechanism for simultaneously blocking both sides of the four exchange channels of the heat exchanger and performing airtight performance detection.

[0008] The blocking detection mechanism includes a fixed disk 1 and a fixed disk 2, both of which are equipped with ear plates symmetrically arranged up and down, and the fixed disk 1 and the fixed disk 2 are respectively slidably connected in the sliding groove through the ear plates, and the opposite surfaces of the fixed disk 1 and the fixed disk 2 are equipped with a fastening sealing drive group for blocking the two ends of the exchange channel, and the fixed disk 1 and the fixed disk 2 are both provided with an inflation channel group, and the fixed disk 1 and the fixed disk 2 are jointly equipped with an airway conversion group for inflating the inflation channels thereon.

[0009] The inflation channel group includes four gas channels arranged in a rectangular shape and opened on the opposite sides of the fixed disk 1 and the fixed disk 2. The opposite sides of the fixed disk 1 and the fixed disk 2 are each provided with a plug hole, and L-shaped channels connected to the plug hole and the four gas channels are each opened.

[0010] The fixed plate is provided with straight through holes arranged in a rectangular shape and connected to the gas channels one by one. In the initial state, the airway conversion group is connected to the jack to perform air tightness detection on the four exchange channels of the heat exchanger at the same time. When a leak occurs, the airway conversion group is converted to connect with the four straight through holes one by one, and the four exchange channels of the heat exchanger are detected one by one.

[0011] In one possible implementation, the tightening and sealing drive group includes four sealing plugs arranged in a rectangular shape and installed on the opposite surfaces of the fixed disk 1 and the fixed disk 2. The sealing plugs are each provided with an inflation connecting hole connected one by one with the corresponding gas channels. The sealing plug is a convex cylindrical structure. The end of the sealing plug away from the gas channel is a conical structure and the small diameter end of the conical structure is close to the heat exchanger. A sealing rubber sleeve is fixed at the connection between the large diameter section and the small diameter section of the sealing plug. A two-way hydraulic cylinder is installed between the two sliding grooves and the horizontal section of the inverted L-shaped frame. The telescopic end of the two-way hydraulic cylinder is fixedly connected to the corresponding ear plate.

[0012] In one possible implementation, the airway conversion group includes a main ventilation duct connected to the socket and moving axially along the socket, the end of the main ventilation duct located in the socket is a conical structure, and the inner hole of the main ventilation duct is located between the four L-shaped channels and the parallel section of the main ventilation duct, a sealing rubber pad is installed at the end of the main ventilation duct located in the socket, and a sleeve is installed after the end of the main ventilation duct away from the socket passes through the socket, an annular groove slidingly plugged with the sleeve is formed on the fixed disk one and the fixed disk two, and a sealing rubber ring is installed in the annular groove, a single detection connecting component is rotatably connected to the sleeve connected to the fixed disk one, an exhaust pipe is installed on the sleeve connected to the fixed disk two, and a blocking and locking drive component for driving the two sleeves to move axially along the socket is installed on the inverted L-shaped frame.

[0013] In a possible implementation, the plugging member includes a plug-in plugging tube connected to a side wall of the fixed disk, and one end of the plug-in plugging tube away from the fixed disk is conical and a rubber ring is installed on the conical side wall.

[0014] In a possible implementation, four rubber hemispheres arranged in a rectangular shape are provided on the sealing rubber pad, and the four rubber hemispheres correspond one-to-one to the four ends of the L-shaped channel respectively.

[0015] In a possible implementation, a rubber sealing plug is installed on the side wall of the second fixing plate through a support frame, and the rubber sealing plug is used to seal the end of the exhaust pipe away from the second fixing plate.

[0016] In one possible implementation, the single detection connecting component includes a telescopic tube rotatably connected to one end of a sleeve connected to the fixed disk one away from the socket, the end of the telescopic tube away from the sleeve is fixedly connected to a connecting guide sleeve, the connecting guide sleeve is rotatably connected to the sleeve and moves along the axial direction of the sleeve, the end of the connecting guide sleeve away from the sleeve is fixedly connected to a connecting pipe, a rotating frame connected to the connecting pipe is fixedly sleeved, a branch channel is provided on the rotating frame, a plug-in connecting head connected to the branch channel is installed on the end face of the rotating frame away from the connecting pipe and close to the fixed disk one, a ventilation valve assembly matching the plug-in connecting head is provided on the straight through hole, a blocking member for blocking the plug-in connecting head is installed on the fixed disk one, and a single detection driving source for driving the connecting pipe to move and the rotating frame to rotate intermittently is provided on the inverted L-shaped frame.

[0017] In one possible implementation, the blocking and locking drive assembly includes ear seats installed on the arc-shaped side walls of the fixed disk one and the fixed disk two, a connecting frame is installed on the side wall of the sleeve, an L-shaped bar passing through the ear seat is installed on the connecting frame, the inverted L-shaped frame is located between two horizontal sections parallel to the two L-shaped bars, and two horizontal sections parallel to the two L-shaped bars are both provided with rectangular through grooves, the vertical section of the inverted L-shaped frame is installed with a two-way cylinder through the frame, and the two telescopic ends of the two-way cylinder are respectively passed through the corresponding rectangular through grooves and then installed with a card block.

[0018] In one possible implementation, the positioning mechanism includes a support bar connected to the top of the base and symmetrically arranged along its width direction, the top of the support bar is rollingly connected with balls evenly arranged along its length direction, and the vertical section of the inverted L-shaped frame is equipped with a limit group for limiting the movement of the heat exchanger along the width direction of the base.

[0019] In a possible implementation, the limiting group includes a T-shaped bracket connected to the vertical section of the inverted L-shaped bracket and arranged symmetrically from top to bottom, and the vertical section of the T-shaped bracket is equipped with rotating rollers evenly arranged from top to bottom.

[0020] The above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects: 1. The plate heat exchanger air tightness detection equipment designed by the present invention for ship main engine, by cooperating with the inflation channel group and the airway conversion group in the blocking detection mechanism, can not only uniformly perform air tightness performance detection on the four exchange channels of the heat exchanger to improve the efficiency of air tightness detection of the heat exchanger, but also can detect the four exchange channels of the heat exchanger one by one when the air tightness is found to be unqualified, and determine the specific exchange channel where the leakage occurs, which greatly improves the efficiency of air tightness detection.

[0021] 2. The positioning mechanism in the present invention cooperates with the blocking detection mechanism to position the placed heat exchanger so that the blocking detection mechanism can accurately seal the four exchange channels of the heat exchanger, further improving the efficiency of airtightness detection.

[0022] 3. The present invention drives fixed disk 1 and fixed disk 2 to move toward the heat exchanger through a tightening and sealing driving group until the tightening and sealing driving group seals both ends of the four exchange channels in a unified manner, thereby achieving an integrated tightening and sealing effect at both ends of the exchange channels, improving the efficiency of sealing the exchange channels, and further improving the efficiency of air tightness detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the first overall three-dimensional structure of the present invention.

[0025] Figure 2 It is a second overall three-dimensional structural schematic diagram of the present invention.

[0026] Figure 3 It is a structural schematic diagram of a fixing plate 1 and a blocking plug thereon of the present invention.

[0027] Figure 4 It is a schematic cross-sectional view of the fixing plate 1 and the inflation channel group thereon of the present invention.

[0028] Figure 5 It is a schematic diagram of the structure of the heat exchanger.

[0029] Figure 6 It is a left side view of a fixed plate 1 of the present invention.

[0030] Figure 7 The present invention Figure 6 AA section view.

[0031] Figure numerals: 1, base; 2, sliding groove; 3, inverted L-shaped frame; 4, positioning mechanism; 40, support bar; 41, T-shaped support frame; 5, blocking detection mechanism; 50, fixed plate one; 51, fixed plate two; 510, rubber sealing plug; 52, ear plate; 53, fastening seal drive group; 530, blocking plug; 531, inflation connecting hole; 532, two-way hydraulic cylinder; 54, inflation channel group; 540, gas channel; 541, jack; 542, L-shaped channel; 543, straight hole; 55, airway conversion group; 550, main ventilation pipe Channel; 551, sealing rubber pad; 580, rubber hemisphere; 552, sleeve; 554, sealing rubber ring; 555, exhaust pipe; 560, telescopic pipe; 561, connecting guide cylinder; 562, connecting pipe; 563, rotating frame; 564, branch channel; 565, plug-in connecting head; 567, ventilation valve assembly; 568, blocking piece; 570, ear seat; 571, connecting frame; 572, L-shaped strip; 573, rectangular through groove; 574, two-way cylinder; 575, block; 6, heat exchanger; 60, exchange channel; 61, mounting seat. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] In order to enable those skilled in the art to better understand the scheme of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0034] See also Figure 1 and Figure 2 A plate heat exchanger air tightness detection device for a ship main engine comprises: a base 1, a top of the base 1 is provided with sliding grooves 2 symmetrically arranged along its length direction, an inverted L-shaped frame 3 located between the two sliding grooves 2 is installed on the top of the base 1, and a positioning mechanism 4 for positioning the heat exchanger 6 when it is placed is installed between the inverted L-shaped frame 3 and the base 1.

[0035] See also Figure 2 and Figure 5 A blocking detection mechanism 5 is commonly installed on the two sliding grooves 2 to simultaneously block both sides of the four exchange channels 60 of the heat exchanger 6 and perform airtight performance detection.

[0036] See also Figure 1 , Figure 2 and Figure 7The blocking detection mechanism 5 includes a fixed disk 1 50 and a fixed disk 2 51, and the fixed disk 1 50 and the fixed disk 2 51 are both installed with ear plates 52 which are symmetrically arranged up and down. The fixed disk 1 50 and the fixed disk 2 51 are respectively slidably connected in the sliding groove 2 through the ear plates 52. The opposite surfaces of the fixed disk 1 50 and the fixed disk 2 51 are installed with a fastening sealing drive group 53 for blocking the two ends of the exchange channel 60. The fixed disk 1 50 and the fixed disk 2 51 are both provided with an inflation channel group 54. The fixed disk 1 50 and the fixed disk 2 51 are jointly installed with an airway conversion group 55 for inflating the inflation channels thereon.

[0037] See also Figure 4 and Figure 7 The inflation channel group 54 includes four gas channels 540 arranged in a rectangular shape and opened on the opposite surfaces of the fixed disk 1 50 and the fixed disk 2 51, and the opposite surfaces of the fixed disk 1 50 and the fixed disk 2 51 are each provided with a plug hole 541, and L-shaped channels 542 connected to the plug hole 541 and the four gas channels 540 are each opened.

[0038] See also Figure 7 The fixing plate 50 is provided with straight through holes 543 arranged in a rectangular shape and connected one by one with the gas channels 540.

[0039] The airway conversion group 55 is connected to the existing air pump and the air pressure detector, so that the four exchange channels 60 of the heat exchanger 6 can be inflated through the airway conversion group 55 to detect the air tightness. During the detection, the heat exchanger 6 is placed between the fixed disk 1 50 and the fixed disk 2 51, and the positioning mechanism 4 is used to position the placed heat exchanger 6 so that the sealing detection mechanism 5 can accurately seal the two ends of the four exchange channels 60.

[0040] The fixing disk 1 50 and the fixing disk 2 51 are driven to move toward the heat exchanger 6 by the tightening and sealing driving group 53 until the tightening and sealing driving group 53 tightens and seals the two ends of the four exchange channels 60 as a whole. At this time, the corresponding L-shaped channels 542 on both sides of the exchange channels 60 are connected with the socket 541, and the airway conversion group 55 blocks the socket 541 on the fixing disk 2 51. The airway conversion group 55 is connected with the socket 541 on the fixing disk 1 50, so that the four exchange channels 60 of the heat exchanger 6 are inflated at the same time through the socket 541 on the fixing disk 1 50 to perform an airtightness test.

[0041] During inflation, the airway conversion group 55 is connected to the socket 541 on the fixed disk 50, and the gas is dispersed into the four corresponding L-shaped channels 542 through the socket 541, and then enters the four exchange channels 60 of the heat exchanger 6 through the four L-shaped channels 542 and the gas channel 540, until the gas in the four exchange channels 60 is in a saturated state, and then the air pump stops working, and observes whether the value displayed on the air pressure detector changes. If there is no change, it means that the air tightness of the heat exchanger 6 is qualified, and the four exchange channels 60 on the heat exchanger 6 can be tested in an integrated manner, thereby improving the efficiency of the air tightness test.

[0042] If the value on the air pressure detector changes, the airway conversion group 55 is started to block the jack 541 and the end of the L-shaped channel 542 connected to the jack 541, and the airway conversion group 55 is converted to be connected to the four straight holes 543 individually, and the four exchange channels 60 are tested one by one.

[0043] To summarize, by cooperating with the inflation channel group 54 and the airway conversion group 55, the four exchange channels 60 of the heat exchanger 6 can be uniformly tested for air tightness performance to improve the efficiency of air tightness testing, and when the air tightness is found to be unqualified, the four exchange channels 60 of the heat exchanger 6 can be tested one by one to determine the specific exchange channel 60 where the leak occurs, which greatly improves the convenience of air tightness testing.

[0044] See also Figure 1 , Figure 2 , Figure 3 and Figure 7 The fastening and sealing drive group 53 includes four rectangularly arranged blocking plugs 530 installed on the opposite surfaces of the fixed disk 1 50 and the fixed disk 2 51. The blocking plugs 530 are each provided with an inflation connecting hole 531 connected one by one with the corresponding gas channel 540. The blocking plug 530 is a convex cylindrical structure. The end of the blocking plug 530 away from the gas channel 540 is a conical structure and the small diameter end of the conical structure is close to the heat exchanger 6. A sealing rubber sleeve is fixedly provided at the connection between the large diameter section and the small diameter section of the blocking plug 530. A two-way hydraulic cylinder 532 is installed between the two sliding grooves 2 and the horizontal section of the inverted L-shaped frame 3. The telescopic end of the two-way hydraulic cylinder 532 is fixedly connected to the corresponding ear plate 52.

[0045] After the heat exchanger 6 is placed, the two bidirectional hydraulic cylinders 532 are started, and the upper and lower bidirectional hydraulic cylinders 532 drive the fixed disk 1 50 and the fixed disk 2 51 to move toward the heat exchanger 6 through the ear plate 52. During the movement, the blocking plug 530 is gradually inserted into the corresponding exchange channel 60 on the heat exchanger 6 until the blocking plug 530 and the end of the exchange channel 60 are tightly pressed. At this time, the sealing rubber sleeve seals the gap between the blocking plug 530 and the inner wall of the end of the exchange channel 60, and the tightening and sealing drive group 53 drives the blocking plugs 530 on the fixed disk 1 50 and the fixed disk 2 51 to perform integrated tightening and sealing on the two ends of the four exchange channels 60, thereby improving the efficiency and convenience of sealing at both ends during air tightness testing.

[0046] See also Figure 1 , Figure 2 and Figure 7 The airway conversion group 55 includes a main ventilation pipe 550 connected to the plug hole 541 and moving axially along the plug hole 541. The end of the main ventilation pipe 550 located in the plug hole 541 is a tapered structure, and the inner hole of the main ventilation pipe 550 is located between the four L-shaped channels 542 and the parallel section of the main ventilation pipe 550. The end of the main ventilation pipe 550 located in the plug hole 541 is installed with a sealing rubber pad 551. The end of the main ventilation pipe 550 away from the plug hole 541 passes through the plug hole 541. A sleeve 552 is installed behind the hole 541. Both the fixed disk 1 50 and the fixed disk 2 51 are provided with an annular groove slidably plugged with the sleeve 552. A sealing rubber ring 554 is installed in the annular groove. A single detection connection component is rotatably connected to the sleeve 552 connected to the fixed disk 1 50. An exhaust pipe 555 is installed on the sleeve 552 connected to the fixed disk 2 51. A blocking and locking driving component that drives the two sleeves 552 to move axially along the socket 541 is installed on the inverted L-shaped frame 3.

[0047] When the four exchange channels 60 of the heat exchanger 6 are uniformly inspected, the end of the exhaust pipe 555 away from the socket 541 is in a blocked state, and the two main ventilation ducts 550 are connected to the corresponding sockets 541 to facilitate the unified inflation inspection of the air tightness of the four exchange channels 60 of the heat exchanger 6 and the unified exhaust.

[0048] When leakage is detected during the unified inspection process, the sealing and locking drive assembly drives the two sleeves 552 and the main ventilation duct 550 to move, and the sealing rubber pad 551 at the end of the main ventilation duct 550 is pressed against the inner wall of the socket 541. The sealing rubber pad 551 seals the end of the L-shaped channel 542. The inner hole of the main ventilation duct 550 and the ends of the four L-shaped channels 542 are staggered and not connected to each other, so as to facilitate the subsequent airtight performance inspection of the four exchange channels 60 of the heat exchanger 6 one by one.

[0049] Afterwards, the single detection connection component is switched to connect with the four through holes 543 one by one, so as to detect the four exchange channels 60 one by one.

[0050] See also Figure 7 The sealing rubber pad 551 is provided with four rubber hemispheres 580 arranged in a rectangular shape, and the four rubber hemispheres 580 correspond to the ends of the four L-shaped channels 542 respectively. When the main ventilation duct 550 is pressed against the plug hole 541, the rubber hemispheres 580 enter the corresponding ends of the L-shaped channels 542, thereby further blocking the ends of the L-shaped channels 542, thereby improving the accuracy of the subsequent detection of the airtight performance of the exchange channels 60 one by one.

[0051] See also Figure 2 The side wall of the fixed disk 2 51 is installed with a rubber sealing plug 510 through a support frame. The rubber sealing plug 510 is used to seal the end of the exhaust pipe 555 away from the fixed disk 2 51. When the four exchange channels 60 of the heat exchanger 6 are uniformly tested for air tightness, the rubber sealing plug 510 seals the end of the exhaust pipe 555. If the air tightness of the heat exchanger 6 is unqualified, the sealing locking drive assembly drives the sleeve 552 and the main ventilation duct 550 to move, and the sleeve 552 drives the exhaust pipe 555 to move, and the exhaust pipe 555 is separated from the rubber sealing plug 510. During the movement of the main ventilation duct 550, the gas in the four exchange channels 60 of the heat exchanger 6 is discharged from the exhaust pipe 555, so that the exchange channels 60 can be tested one by one and inflated again.

[0052] See also Figure 1 , Figure 2 and Figure 7The single detection connection component includes a telescopic tube 560 that is rotatably connected to the end of the sleeve 552 connected to the fixed disk 50 away from the socket 541, and the end of the telescopic tube 560 away from the sleeve 552 is fixedly connected to a connecting guide cylinder 561, and the connecting guide cylinder 561 is rotatably connected to the sleeve 552 and moves along the axial direction of the sleeve 552. The connecting guide cylinder 561 cooperates with the sleeve 552 to seal the rotating connection between the telescopic tube 560 and the sleeve 552, thereby improving the air tightness of the connection between the telescopic tube 560 and the sleeve 552, and the end of the connecting guide cylinder 561 away from the sleeve 552 is fixedly connected to the connecting tube 562, a rotating frame 563 connected to the connecting pipe 562 is fixedly sleeved thereon, a branch channel 564 is opened on the rotating frame 563, a plug-in connecting head 565 connected to the branch channel 564 is installed on the end face of the rotating frame 563 away from the connecting pipe 562 and close to the fixed plate 50, a vent valve assembly 567 (such as an inflation valve on a tire) matched with the plug-in connecting head 565 is arranged on the straight through hole 543, a blocking member 568 for blocking the plug-in connecting head 565 is installed on the fixed plate 50, and a single detection driving source for driving the connecting pipe 562 to move and the rotating frame 563 to rotate intermittently is arranged on the inverted L-shaped frame 3.

[0053] In the initial state, the plug-in connecting head 565 is pressed against the sealing member 568, so that the gas filled in the connecting pipe 562 connected to the air pump can only enter the plug hole 541 from the main ventilation pipe 550 to uniformly detect the four exchange channels 60 of the heat exchanger 6. After the plugging and locking drive assembly drives the two main ventilation pipes 550 to press against the corresponding plug holes 541, a single detection drive source (specifically, an electric slider connected to the inverted L-shaped frame 3 to drive the connecting pipe 562 to move along its axial direction and a groove wheel mechanism that drives the rotating frame 563 and the connecting pipe 562 to rotate intermittently, the above mechanisms are all existing mechanisms, not shown in the figure) drives the rotating frame 563 and the connecting pipe 562 to move along the axial direction of the connecting pipe 562. At this time, the telescopic tube 560 is extended, the connecting guide cylinder 561 slides axially along the sleeve 552, and the plug-in connecting head 565 is After disengaging from the sealing member 568, the rotating frame 563 and the connecting pipe 562 drive the plug-in connecting head 565 to rotate and align with the four ventilation valve assemblies 567 one by one. When the plug-in connecting head 565 is aligned with the ventilation valve assembly 567, the single detection driving source drives the rotating frame 563 and the connecting pipe 562 to move axially along the connecting pipe 562, and the plug-in connecting head 565 is pressed against the ventilation valve assembly 567. At the same time, the ventilation valve assembly 567 is connected with the plug-in connecting head 565, and then the air pump inflates the connecting pipe 562. The gas passes through the connecting pipe 562, the branch channel 564, the plug-in connecting head 565, the ventilation valve assembly 567, the straight through hole 543 and the gas channel 540 to inflate the corresponding exchange channel 60, thereby performing airtightness performance detection on the four exchange channels 60 of the heat exchanger 6 one by one, thereby greatly improving the convenience of airtightness detection.

[0054] See also Figure 1 The sealing member 568 includes a plug-in sleeve sealing tube connected to the side wall of the fixed disk 50, the end of the plug-in sleeve sealing tube away from the fixed disk 50 is conical and a rubber ring (not shown in the figure) is installed on the conical side wall, and the plug-in sleeve connecting head 565 is sleeved on the plug-in sleeve sealing tube and pressed against the rubber ring, thereby achieving sealing of the end of the plug-in sleeve connecting head 565 to ensure the accuracy of the test result when the sealing detection mechanism 5 performs a unified airtight performance test on the four exchange channels 60 of the heat exchanger 6.

[0055] See also Figure 1 and Figure 2, the plugging and locking drive assembly includes ear seats 570 installed on the arc-shaped side walls of the first fixed plate 50 and the second fixed plate 51. A connecting frame 571 is installed on the side wall of the sleeve 552. An L-shaped bar 572 passing through the ear seat 570 is installed on the connecting frame 571. The inverted L-shaped frame 3 is located between the two parallel horizontal sections of the two L-shaped bars 572. Rectangular through slots 573 are provided in the two parallel horizontal sections of the two L-shaped bars 572. A two-way cylinder 574 is installed on the vertical section of the inverted L-shaped frame 3 through a frame. The two telescopic ends of the two-way cylinder 574 are respectively installed with a clamping block 575 after passing through the corresponding rectangular through slots 573.

[0056] In the initial state, the two L-shaped bars 572 are far away from the inverted L-shaped frame 3, and the L-shaped bars 572 are always sleeved on the telescopic section of the two-way cylinder 574 through the rectangular through slots 573. Then, the two-way cylinder 574 is started. The two-way cylinder 574 drives the clamping block 575 to move. When the clamping block 575 abuts against the L-shaped bar 572, it drives the L-shaped bar 572 to move. The L-shaped bar 572 pulls the sleeve 552 and drives the main ventilation pipe 550 to move until the main ventilation pipe 550 abuts tightly against the jack 541.

[0057] Refer to Figure 1 And Figure 2 , the positioning mechanism 4 includes support bars 40 connected to the top of the base 1 and symmetrically arranged along its width direction. The top of the support bars 40 is connected with balls (not shown in the figure) evenly arranged along its length direction. A limiting group for limiting the movement of the heat exchanger 6 along the width direction of the base 1 is installed on the vertical section of the inverted L-shaped frame 3.

[0058] Refer to Figure 1 And Figure 2 , the limiting group includes T-shaped abutting frames 41 connected to the vertical section of the inverted L-shaped frame 3 and arranged symmetrically up and down. Rotating rollers (not shown in the figure) evenly arranged from top to bottom are installed on the vertical sections of the T-shaped abutting frames 41. The rotating rollers are used to reduce the friction when the heat exchanger 6 moves.

[0059] Refer to Figure 1-Figure 7 , place the heat exchanger 6 between the first fixed plate 50 and the second fixed plate 51, and one side wall of the heat exchanger 6 arranged along its width direction abuts against the T-shaped abutting frame 41. At this time, the two mounting seats 61 in the shape of an inverted U at the bottom of the heat exchanger 6 are respectively aligned with the two support bars 40 up and down one by one. Then, place the heat exchanger 6 downward so that the mounting seats 61 are stuck on the corresponding support bars 40. The heat exchanger 6 is positioned under the cooperation of the support bars 40 and the T-shaped abutting frames 41, so as to facilitate the plugging plug 530 to accurately insert into the end of the corresponding exchange channel 60.

[0060] During detection, the heat exchanger 6 is placed between the fixed disk 1 50 and the fixed disk 2 51, and the heat exchanger 6 is positioned by the positioning mechanism 4. Then, the fixed disk 1 50 and the fixed disk 2 51 are driven to move toward the heat exchanger 6 by the fastening and sealing drive group 53 until the fastening and sealing drive group 53 fastens and seals the two ends of the four exchange channels 60 as a whole. At this time, the airway conversion group 55 blocks the hole 541 on the fixed disk 2 51, and the airway conversion group 55 is connected to the hole 541 on the fixed disk 1 50, so that the four exchange channels 60 of the heat exchanger 6 are simultaneously inflated and tested through the hole 541 on the fixed disk 1 50.

[0061] During inflation, the gas is dispersed into the four corresponding L-shaped channels 542 through the socket 541 on the fixed disk 50, and then enters the four exchange channels 60 of the heat exchanger 6 through the four L-shaped channels 542 and the gas channel 540, until the gas in the four exchange channels 60 is in a saturated state, and then the air pump stops working, and observes whether the displayed value of the air pressure detector changes. If there is no change, it means that the air tightness of the heat exchanger 6 is qualified. If there is a change, the airway conversion group 55 is started to block the socket 541 and the end connecting the L-shaped channel 542 and the socket 541, and connect with the four straight holes 543 separately through the airway conversion group 55, so as to detect the four exchange channels 60 of the heat exchanger 6 one by one and determine the specific exchange channel 60 where the leakage occurs.

[0062] In the description of the present invention, it is necessary to understand that the terms "length", "width", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0063] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A plate heat exchanger air tightness detection device for a ship main engine, characterized in that: include: A base (1), the top of the base (1) is provided with sliding grooves (2) symmetrically arranged along the length direction thereof, the top of the base (1) is provided with an inverted L-shaped frame (3) located between the two sliding grooves (2), and a positioning mechanism (4) for positioning the heat exchanger (6) is installed between the inverted L-shaped frame (3) and the base (1); The two sliding grooves (2) are jointly provided with a blocking detection mechanism (5) for simultaneously blocking both sides of the four exchange channels (60) of the heat exchanger (6) and performing airtightness detection; The blocking detection mechanism (5) comprises a fixed disk 1 (50) and a fixed disk 2 (51), both of which are provided with ear plates (52) symmetrically arranged in an upper and lower direction, and the fixed disk 1 (50) and the fixed disk 2 (51) are respectively slidably connected in the sliding groove (2) through the ear plates (52), and a fastening sealing drive group (53) for blocking both ends of the exchange channel (60) is installed on the opposite surfaces of the fixed disk 1 (50) and the fixed disk 2 (51), and an inflation channel group (54) is opened on the fixed disk 1 (50) and the fixed disk 2 (51), and an airway conversion group (55) for performing inflation conversion is installed on the fixed disk 1 (50) and the fixed disk 2 (51); The inflation channel group (54) comprises four gas channels (540) arranged in a rectangular shape and provided on opposite surfaces of the first fixing plate (50) and the second fixing plate (51); opposite surfaces of the first fixing plate (50) and the second fixing plate (51) are provided with plug holes (541); and L-shaped channels (542) communicating with the plug holes (541) and the four gas channels (540) are provided; The fixed disk (50) is provided with straight through holes (543) arranged in a rectangular shape and connected one by one with the gas channels (540); in the initial state, the air channel switching group (55) is connected with the plug hole (541) to simultaneously perform air tightness detection on the four exchange channels (60); when leakage occurs, the air channel switching group (55) is individually connected with the four straight through holes (543) one by one to detect the four exchange channels (60) one by one.

2. According to claim 1, a plate heat exchanger air tightness detection device for a ship main engine, characterized in that: The tightening and sealing drive group (53) comprises four rectangularly arranged blocking plugs (530) installed on the opposite surfaces of the fixing plate 1 (50) and the fixing plate 2 (51); each of the blocking plugs (530) is provided with an air filling communication hole (531) connected one-to-one with the corresponding gas channel (540); the blocking plug (530) is in a convex cylindrical structure; one end of the blocking plug (530) away from the gas channel (540) is in a conical structure, and the small diameter end of the conical structure is close to the heat exchanger (6); a sealing rubber sleeve is fixedly provided at the connection between the large diameter section and the small diameter section of the blocking plug (530); a bidirectional hydraulic cylinder (532) is installed between the two sliding grooves (2) and the horizontal section of the inverted L-shaped frame (3); and the telescopic end of the bidirectional hydraulic cylinder (532) is fixedly connected to the corresponding ear plate (52).

3. According to claim 1, a plate heat exchanger air tightness detection device for a ship main engine, characterized in that: The airway conversion group (55) comprises a main ventilation pipe (550) connected to the plug hole (541) and movable along the axial direction of the plug hole (541); one end of the main ventilation pipe (550) located in the plug hole (541) is a conical structure, and the inner hole of the main ventilation pipe (550) is located between the four L-shaped channels (542) and the parallel section of the main ventilation pipe (550); the end of the main ventilation pipe (550) located in the plug hole (541) is installed with a sealing rubber pad (551); the end of the main ventilation pipe (550) away from the plug hole (541) passes through the plug hole A sleeve (552) is installed behind the fixing plate (541), an annular groove for slidingly plugging with the sleeve (552) is opened on the fixing plate (50) and the fixing plate (51), a sealing rubber ring (554) is installed in the annular groove, a single detection connection component is rotatably connected to the sleeve (552) connected to the fixing plate (50), an exhaust pipe (555) is installed on the sleeve (552) connected to the fixing plate (51), and a blocking and locking driving component for driving the two sleeves (552) to move axially along the insertion hole (541) is installed on the inverted L-shaped frame (3).

4. According to claim 3, a plate heat exchanger air tightness detection device for a ship main engine is characterized in that: The single detection connection component comprises a telescopic tube (560) rotatably connected to one end of a sleeve (552) connected to a fixed disk (50) and away from the insertion hole (541); one end of the telescopic tube (560) away from the sleeve (552) is fixedly connected to a connecting guide cylinder (561); the connecting guide cylinder (561) is rotatably connected to the sleeve (552) and moves along the axial direction of the sleeve (552); one end of the connecting guide cylinder (561) away from the sleeve (552) is fixedly connected to a connecting tube (562); a rotating frame (563) connected to the connecting tube (562) is fixedly sleeved on the connecting tube (562); The rotating frame (563) is provided with a branch channel (564); an end surface of the rotating frame (563) away from the connecting pipe (562) and close to the fixed disk (50) is provided with a plug-in connecting head (565) connected with the branch channel (564); a venting valve assembly (567) matched with the plug-in connecting head (565) is provided on the straight hole (543); a blocking member (568) for blocking the plug-in connecting head (565) is installed on the fixed disk (50); and a single detection driving source for driving the connecting pipe (562) to move and the rotating frame (563) to rotate intermittently is provided on the inverted L-shaped frame (3).

5. According to claim 3, a plate heat exchanger air tightness detection device for a ship main engine is characterized in that: The blocking and locking drive assembly comprises ear seats (570) mounted on the arc-shaped side walls of the first fixed plate (50) and the second fixed plate (51); a connecting frame (571) is mounted on the side wall of the sleeve (552); an L-shaped bar (572) penetrating the ear seat (570) is mounted on the connecting frame (571); an inverted L-shaped frame (3) is located between two parallel horizontal sections of the two L-shaped bars (572); and two parallel horizontal sections of the two L-shaped bars (572) are both provided with rectangular through grooves (573); a bidirectional cylinder (574) is mounted on the vertical section of the inverted L-shaped frame (3) through a frame; and two telescopic ends of the bidirectional cylinder (574) are respectively passed through corresponding rectangular through grooves (573) and then mounted with a clamping block (575).

6. The air tightness detection device for a plate heat exchanger for a ship main engine according to claim 4, characterized in that: The plugging member (568) comprises a plug-in plugging tube connected to the side wall of the fixed disk (50); one end of the plug-in plugging tube away from the fixed disk (50) is in a conical shape and a rubber ring is installed on the conical side wall.

7. The air tightness detection device for a plate heat exchanger for a ship main engine according to claim 3, characterized in that: The sealing rubber pad (551) is provided with four rubber hemispheres (580) arranged in a rectangular shape, and the four rubber hemispheres (580) correspond one-to-one to the ends of the four L-shaped channels (542), respectively.

8. The air tightness detection equipment for plate heat exchanger for main engine of a ship according to claim 1, characterized in that: The positioning mechanism (4) comprises a support bar (40) connected to the top of the base (1) and arranged symmetrically along the width direction thereof, the top of the support bar (40) is rollingly connected to balls evenly arranged along its length direction, and the vertical section of the inverted L-shaped frame (3) is equipped with a limit group for limiting the movement of the heat exchanger (6) along the width direction of the base (1).

9. The air tightness detection device for a plate heat exchanger for a ship main engine according to claim 8, characterized in that: The limiting group comprises a T-shaped support frame (41) connected to the vertical section of the inverted L-shaped frame (3) and arranged symmetrically from top to bottom, and the vertical section of the T-shaped support frame (41) is equipped with rotating rollers evenly arranged from top to bottom.

10. The air tightness detection device for a plate heat exchanger for a ship main engine according to claim 3, characterized in that: A rubber sealing plug (510) is installed on the side wall of the second fixed disk (51) through a support frame. The rubber sealing plug (510) is used to seal the end of the exhaust pipe (555) away from the second fixed disk (51).

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