CN104180955A - Heat collector channel vertical type automatic pressure testing machine - Google Patents

Heat collector channel vertical type automatic pressure testing machine Download PDF

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Publication number
CN104180955A
CN104180955A CN201410387007.3A CN201410387007A CN104180955A CN 104180955 A CN104180955 A CN 104180955A CN 201410387007 A CN201410387007 A CN 201410387007A CN 104180955 A CN104180955 A CN 104180955A
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CN
China
Prior art keywords
water
heat collector
pressure
pipeline
collector runner
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201410387007.3A
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Chinese (zh)
Inventor
鲍业喜
李振锋
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Guangdong Fivestar Solar Energy Co Ltd
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Guangdong Fivestar Solar Energy Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Guangdong Fivestar Solar Energy Co Ltd filed Critical Guangdong Fivestar Solar Energy Co Ltd
Priority to CN201410387007.3A priority Critical patent/CN104180955A/en
Publication of CN104180955A publication Critical patent/CN104180955A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a heat collector channel vertical type automatic pressure testing machine. The heat collector channel vertical type automatic pressure testing machine comprises a support and a control case arranged at one side of the support. The support at least comprises a test station, the control case is internally provided with a water injection system and a pressure charging system, and water is injected into a heat collector channel simultaneously through the water injection system and the pressure charging system, such that the work time of a pressure charging water pump is greatly shortened, energy consumption and wearing are reduced, and the problem of a nest gas phenomenon generated in the heat collector channel can be eliminated. Besides, a water outlet pipeline employs an electric ball valve or other valves capable of slow closure, such that a water hammer phenomenon is eliminated. Through a reasonable design method, several procedures of water injection, pressure charging, pressure maintaining and pressure relieving during pressure testing can be reliably automatically operated, an interruption function is added to a circuit design, i.e., in case that a water leak is discovered in a water injection phase, a pressure charging phase and a pressure maintaining phase, after a water leakage position is determined, an interruption button is pressed, and a system immediately enters a pressure relieving phase, such that the system operation time is shortened, and the work efficiency is improved.

Description

The vertical automatic pressure test device of heat collector runner
Technical field
The present invention relates to a kind of pressure testing machine for whether there is leakage to check to pipeline, more particularly, relate to a kind of vertical automatic pressure test device for whether there is leakage to check to heat collector runner.
Background technology
Heat collector runner is the vitals of flat-plate solar collector, the collector plate core of heat collector runner and absorber plate composition flat-plate solar collector.Heat collector runner is to be made up of with some combs that weld mutually with collector collector, the heat collector runner being welded by collector and some combs need to check, determine without holding plate with suction again after leaking and be assembled into collector plate core, thereby the quality of flat-plate solar collector is effectively guaranteed.Otherwise, if the quality that makes flat-plate solar collector is had a greatly reduced quality because heat collector runner exists to leak, even cannot use, be unfavorable for improving the product percent of pass of flat-plate solar collector, also bring huge loss to user.
At present, in sun power industry, the pressure testing of heat collector runner adopts manual type in the majority, and small part adopts pressure testing equipment.Artificial pressure testing exists that labour intensity is large, workman's fatiguability, cost of labor are high, pressure test pressure and dwell time all cannot ensure for a long time, and security incident and product quality accident easily occur, and this kind of mode belongs to superseded ranks already.In view of all drawbacks of artificial pressure testing, Some Enterprises has been manufactured experimently pressure testing equipment, but this kind equipment is because design time has problems, and causes reliability extreme difference, even so sun power industry has developed into industry in large scale, but this kind equipment does not still obtain extensive popularization.Mainly there is following defect for the vertical pressure testing equipment of heat collector runner in tradition:
1, there is " water hammer " problem for the vertical pressure testing equipment of heat collector runner in tradition, and easily pipeline and the pipe fitting of the vertical pressure testing equipment to heat collector runner cause damage, have a strong impact on the serviceable life of equipment.
2, tradition can only be by pressure piping to water filling in heat collector runner for the vertical pressure testing equipment of heat collector runner, flow in inflow heat collector runner is little, water injection time is long, working time and the wearing and tearing of booster water pump are greatly increased, and causing the needed time of pressure testing long, the work pressure test efficiency of equipment is low.
If 3, find to leak at water filling, supercharging, packing stage, can not carry out in time pressure release, interrupt pressure testing process, extend operation hours, the inefficiency of equipment pressure testing.
4, tradition can only be by pressure piping to water filling in heat collector runner for the vertical pressure testing equipment of heat collector runner, flow in input heat collector runner is little, the water filling stage can not ensure that outlet pipeline full-section pipe-flow goes out current, cause exhaust not smooth, in heat collector runner, there is the problem of " choking with resentment ", water discharging valve on outlet pipeline has been closed, can not injected water on the position of " choking with resentment " due to the generation of the problem of choking with resentment in heat collector runner, and water filling pressure testing is carried out in the position that cannot choke with resentment to this generation, the position that some these generations are choked with resentment exists leaks and cannot be examined out, greatly reduce the reliability of pressure test leak-detecting.
Summary of the invention
The object of the invention is to overcome above-mentioned defect of the prior art, a kind of problem of water hammer that can eliminate in the vertical pressure testing equipment of heat collector runner is provided, thereby extend the serviceable life of the vertical pressure testing equipment of heat collector runner, can significantly improve the work efficiency of the vertical pressure testing equipment of heat collector runner and the reliability of pressure test leak-detecting, be convenient to subsequent handling and carry out the vertical automatic pressure test device of heat collector runner of assembling product.
For achieving the above object, technical scheme provided by the invention is as follows:
The vertical automatic pressure test device of a kind of heat collector runner, comprise support, be arranged on the control box of support one side, on described support, at least comprise a test station, described test station has the first drive unit being installed on support, the second drive unit, water supply connector, water out adapter, the first sealing adaptor and the second sealing adaptor, described water supply connector or the first sealing adaptor and the first drive unit are in transmission connection, described water out adapter or the second sealing adaptor and the second drive unit are in transmission connection, also comprise be installed in control box and with the inlet pipeline waterflood system being communicated with in parallel of this water supply connector and pressure charging system and be installed on the outlet pipeline of water out adapter for eliminate water hammer can slowly closing valve.
Described waterflood system comprises the water injecting pipeline being connected with inlet pipeline, is installed in the first solenoid valve and the first retaining valve on water injecting pipeline, and water injecting pipeline is connected with the inlet pipeline of water supply connector.
Described pressure charging system comprises reserve tank, and the pressure piping being connected with reserve tank is installed in booster water pump and the second retaining valve on pressure piping, and pressure piping is connected with the inlet pipeline of water supply connector.
Also comprise a controller, be installed in the pressure transducer on the inlet pipeline of described water supply connector, be installed in the supervising device on the outlet pipeline of water out adapter, the signal input part of controller is connected with pressure transducer and supervising device communication, and the signal output part of controller and described booster water pump, the first solenoid valve and valve communication that can slowly closing are connected.
As preferential choosing, in the technical scheme of the vertical automatic pressure test device of above-mentioned heat collector runner, on the inlet pipeline of described water supply connector, being equiped with the first threeway, water supply connector, waterflood system and pressure charging system are connected with corresponding interface in the first threeway respectively.
As preferential choosing, in the technical scheme of the vertical automatic pressure test device of above-mentioned heat collector runner, on described water injecting pipeline, be equiped with the second threeway, the inlet pipeline of reserve tank is connected with this second threeway, is positioned on the inlet pipeline of reserve tank of reserve tank and is equiped with ball-cock assembly.
As preferential choosing, in the technical scheme of the vertical automatic pressure test device of above-mentioned heat collector runner, on the outlet pipeline of described water out adapter, be equiped with the tensimeter for showing the pressure in heat collector runner.
Furthermore, in the technical scheme of the vertical automatic pressure test device of above-mentioned heat collector runner, the bottom of described reserve tank is equiped with blowdown apparatus, this blowdown apparatus is by the blow-off pipe being connected with reserve tank, the second solenoid valve being installed on blow-off pipe forms, and the second solenoid valve is connected with controller communication.
Furthermore, on described support, be also provided with the control hand valve of controlling the first drive unit and the second drive unit.
Compared with prior art, beneficial effect of the present invention is: by install at least one test station on support, this test station has the first drive unit being installed on support, the second drive unit, water supply connector, water out adapter, the first sealing adaptor and the second sealing adaptor, described water supply connector or the first sealing adaptor and the first drive unit are in transmission connection, described water out adapter or the second sealing adaptor and the second drive unit are in transmission connection, also comprise be installed in control box and with the inlet pipeline waterflood system being communicated with in parallel of this water supply connector and pressure charging system and be installed on the outlet pipeline of water out adapter for eliminate water hammer can slowly closing valve.The water filling stage can be simultaneously by waterflood system and pressure charging system to the water filling of heat collector runner, greatly shorten the time of water filling, large flow water inlet is quicker, easily the air of heat collector runner is thoroughly discharged, eliminate and in heat collector runner, produce the problem of choking with resentment, can significantly improve the work efficiency of the vertical pressure testing equipment of heat collector runner and the reliability of pressure test leak-detecting; On outlet pipeline, adopt can slowly closing valve, even eliminate water hammer thereby weaken, thereby extend the serviceable life of the vertical pressure testing equipment of heat collector runner.
Brief description of the drawings
Fig. 1 is the structure principle chart of the vertical automatic pressure test device of heat collector of the present invention;
Fig. 2 is the three-dimensional structure diagram of the vertical automatic pressure test device embodiment mono-of single station heat collector of the present invention;
Fig. 3 is the three-dimensional structure diagram of the vertical automatic pressure test device embodiment bis-of double heat collector of the present invention.
Below in conjunction with drawings and Examples, the three-dimensional automatic pressure test device of heat collector runner of the present invention is described further.
Embodiment
Be below the preferred example of the three-dimensional automatic pressure test device of heat collector runner of the present invention, therefore do not limit protection scope of the present invention.
Embodiment mono-
Please refer to Fig. 1 and Fig. 2, Fig. 1 and Fig. 2 show the vertical automatic pressure test device of a kind of single station heat collector runner, comprise support 1, be installed in the control box 20 of support 1 one sides, on support 1, be provided with a test station 21, described test station 21 comprises the first drive unit 2 being installed on support 1, the second drive unit 3, water supply connector 4, water out adapter 5, the first sealing adaptor 22 and the second sealing adaptor 23, the first drive unit 2 in this enforcement, the second drive unit 3 adopts cylinder, certain also available hydraulic cylinder or the device that adopts servomotor and screw mandrel etc. can realize straight line back and forth movement substitute, described the first sealing adaptor 22 and the first drive unit 2 are in transmission connection, described water out adapter 5 and the second drive unit 3 are in transmission connection, also comprise and be installed in the waterflood system 7 and the pressure charging system 8 that in control box 20 and with the inlet pipeline parallel connection of this water supply connector 4, are communicated with, and be installed on the outlet pipeline of water out adapter 5 can slowly closing valve 9, the valve 9 that in the present embodiment, this can slowly closing is electrical ball valve, also can use fluid automatic controlling valve, multifunctional water pump control valve etc. can slowly closing device, system pipeline can be carried out stably in the time closing supercharging, thereby weaken even except water hammer, improve the reliability of system, guarantee that equipment can stablize use for a long time.
Certainly, also can adopt water supply connector 4 and the first drive unit 2 to be in transmission connection, the second sealing adaptor 23 and two drive units 3 are in transmission connection.
When heat collector runner is arranged on test station, the first drive unit 2 and the second drive unit 3 advance, heat collector runner is compressed, thereby water supply connector 4, water out adapter 5, the first sealing adaptor 22 and the second sealing adaptor 23 are tightly connected with the corresponding water inlet of heat collector runner or water delivering orifice respectively.
While unloading heat collector runner, the first drive unit 2 and the second drive unit 3 retreat, and heat collector runner is unclamped, then heat collector runner is unloaded.
In the present embodiment, waterflood system 7 comprises the water injecting pipeline 71 being connected with inlet pipeline, be installed in the first solenoid valve 72 and the first retaining valve 73 on water injecting pipeline 71, in order to control waterflood system 7 and anti-backflow, waterflood system 7 is connected with the inlet pipeline of water supply connector 4; Pressure charging system 8 comprises reserve tank 81, and the pressure piping 82 being connected with reserve tank 81 is installed in booster water pump 83 and the second retaining valve 84 on pressure piping 82, and pressure piping 82 is connected with the inlet pipeline of water supply connector 4.
In this enforcement, in described control box 20, be also provided with a controller 13, control box 20 is provided with the control panel 201 being connected with controller 13 communications, control panel 201 is provided with " power switch ", " power lights ", " blowdown ", " interruption ", " pressurize lamp ", function button and display lamps such as " startups ", on the inlet pipeline of described water supply connector 4, be equiped with pressure transducer 10, the signal input part of controller 13 is connected with pressure transducer 10 communications, the signal output part of controller 13 and described booster water pump 83, the first solenoid valve 72 is connected with valve 9 communications that can slowly closing.
Preferably, be also provided with the first threeway 15 on the inlet pipeline of described water supply connector 4, waterflood system 7, pressure charging system 8 and water supply connector 4 are connected with corresponding interface respectively.
Preferably, the water injecting pipeline 71 of described waterflood system 7 is provided with the second threeway 14, the inlet pipeline of reserve tank 81 is connected with this second threeway 14, be positioned on the inlet pipeline of reserve tank 81 of reserve tank 81 and be equiped with ball-cock assembly 85, in the time that the water level in reserve tank 81 reaches setting value, ball-cock assembly 85 is closed, and stops adding water in reserve tank 81.
Preferably, on the outlet pipeline of described water out adapter 5, be also equiped with the tensimeter 18 for showing heat collector runner internal pressure, can be observed the pressure in heat collector runner by tensimeter 18, can also on control box 20, display be set, by controller 13, pressure transducer 10 is detected to signal outputs on display and show, also can observe the pressure in heat collector runner.
Whether on the outlet pipeline of water out adapter 5, be also equiped with for judging water lines is the supervising device 51 that full-section pipe-flow goes out current, this supervising device 51 is connected with the signal input end communication of controller 13, what in the present embodiment, this supervising device 51 used is flow detector, in the time that flow detector detects that outlet pipeline reaches maximum flow, signal is passed to controller 13, then controller 13 export control signal make can slowly closing valve 9 slowly closings, certainly this supervising device 51 also can be judged the water lines device whether full-section pipe-flow goes out current with other and substitutes, as the time relay, this time relay is connected with valve 9 communications that can slowly closing, the minimum time needing need to measure by experiment outlet pipeline and reach full packages flowing water time, service time is when relay, time parameter that should the time relay is set to be more than or equal to this minimum time, certainly, also can with time condenser arrange simultaneously can slowly closing valve 9 time and the needed dwell time of closing, when water injection time reaches the time that the time relay is set, now outlet pipeline flows out with full packages water, the time relay sends signal, valve 9 that can slowly closing is closed, enter pressurization stages, packing stage reached after the dwell time that the time relay sets, and the valve 9 that time relay control can slowly closing is opened and carried out pressure release.
The bottom of reserve tank 81 is also equiped with blowdown apparatus 19, and this blowdown apparatus 19 is by the blow-off pipe 191 being connected with reserve tank 81, and the second solenoid valve 192 being installed on blow-off pipe 191 forms, and the second solenoid valve 192 is connected with controller 13 communications.
Furthermore, on described support, be also provided with the control hand valve 6 of controlling the first drive unit 2 and the second drive unit 3, by controlling hand valve 6, the first drive unit 2 and the second drive unit are controlled, the first drive unit 2 and the second drive unit 3 also can be controlled automatically by controller 13.
While adopting the vertical automatic pressure test device of above-mentioned heat collector runner to carry out pressure testing to heat collector runner, comprise water filling, supercharging, pressurize, interrupt, pressure release double teacher, while starting working, manually make two cylinders drive the first sealing adaptor 22 by controlling hand valve 6, the second sealing adaptor 23 lifts, manually heat collector runner is put in pressure testing district, heat collector collector end opening is aimed at respectively water supply connector 4, the second sealing adaptor 23, first sealing adaptor 22 of aiming at respectively suitable for reading, water out adapter 5, control two cylinders the first sealing adaptor 22 by controlling hand valve 6 again, water out adapter 5 is fallen compression collector, confirm without after deflection, access power supply, press " power switch ", now " power lights " on control panel 201 can light.
One, water filling, press " startup " button on control panel 201, controller 13 start signal output booster water pumps 83 are also opened the first solenoid valve 72, pressure charging system 8 and waterflood system 7 is simultaneously to water filling in heat collector runner, enter the water filling stage, in the time that flow detector detects outlet pipeline and goes out current with full-section pipe-flow, controller 13 output signal control electrical ball valves 9 are closed, and electrical ball valve 9 closes to eliminate water hammer with slow speed;
Two, supercharging, the first output signal of controller 13 is closed the first solenoid valve 72, waterflood system 7 stops water filling, pressure charging system 8 continues to water filling in heat collector runner, enter pressurization stages, set needed pressure test pressure by controller 13, when the pressure in pressure transducer 10 detects heat collector runner reaches the pressure test pressure of setting, controller 13 output signals quit work booster water pump 83, and pressure charging system 8 stops to water filling in heat collector runner;
Three, pressurize, set the needed dwell time, enter packing state, whether now " the pressurize lamp " on control panel can light, can check everywhere whether leak, and observe heat collector runner internal pressure by tensimeter 18 and reduce simultaneously, if heat collector runner is without leaking, skip to the 5th step, if heat collector runner leaks, then carry out the 4th step;
Four, interrupt, press " interruption " button on control panel 201, valve 9 that directly can slowly closing by controller 13 output signal controls is opened and is carried out pressure release, and heat collector runner internal pressure declines, unload this heat collector runner, this heat collector runner is underproof heat collector runner;
Five, pressure release, reached after the dwell time setting, and " pressurize lamp " closes automatically, controller 13 output signal controls can slowly closing valve 9 open and carry out pressure release, heat collector runner internal pressure declines, and unloads this heat collector runner, and this heat collector runner is qualified heat collector runner.
After long-term use, in reserve tank 81, have dirt, impurity, can be by pressing " blowdown " button on control panel 201, the second solenoid valve 192 of opening on blow-off pipe 191 by controller 13 carries out blowdown, after removing contamination, press again this key, the resilience of " blowdown " button, controller 13 controls the second solenoid valve 192 and cuts out.
Embodiment bis-
The vertical automatic pressure test device of a kind of double heat collector runner has been shown in Fig. 3, only need on support 1, install test battery stations 21 more, a set of and newly-increased test station 21 inlet pipelines waterflood system 7 and the pressure charging system 8 being communicated with in parallel is set in control box more, described waterflood system 7, pressure charging system 8 shares a reserve tank 81 to save space, two cover test stations 21 are provided with separately the independently tensimeter 18 of detected pressures, pressure transducer 10, and whether judged water lines on outlet pipeline is that full-section pipe-flow goes out the supervising device 51 of current and valve 9 that can slowly closing, can be by the separate work of key control two cover system of pressing on control panel 201, other structures are identical with embodiment mono-, repeat no more.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.

Claims (7)

1. the vertical automatic pressure test device of heat collector runner, comprise support (1), be arranged on the control box (20) of support (1) one side, it is characterized in that: on described support (1), at least comprise a test station (21), described test station (21) has the first drive unit (2) being installed on support (1), the second drive unit (3), water supply connector (4), water out adapter (5), the first sealing adaptor (22) and the second sealing adaptor (23), described water supply connector (4) or the first sealing adaptor (22) are in transmission connection with the first drive unit (2), described water out adapter (5) or the second sealing adaptor (23) are in transmission connection with the second drive unit (3), also comprise be installed in control box (20) and with the inlet pipeline waterflood system (7) being communicated with in parallel of this water supply connector (4) and pressure charging system (8) and be installed on the outlet pipeline of water out adapter (5) for eliminate water hammer can slowly closing valve (9),
Described waterflood system (7) comprises the water injecting pipeline (71) being connected with inlet pipeline, be installed in the first solenoid valve (72) and the first retaining valve (73) on water injecting pipeline (71), water injecting pipeline (71) is connected with the inlet pipeline of water supply connector (4);
Described pressure charging system (8) comprises reserve tank (81), the pressure piping (82) being connected with reserve tank (81), be installed in booster water pump (83) and the second retaining valve (84) on pressure piping (82), pressure piping (82) is connected with the inlet pipeline of water supply connector (4);
Also comprise a controller (13), be installed in the pressure transducer (10) on the inlet pipeline of described water supply connector (4), the signal input part of controller (13) is connected with pressure transducer (10) communication, and the signal output part of controller (13) and described booster water pump (83), the first solenoid valve (72) and valve (9) communication that can slowly closing are connected.
2. the vertical automatic pressure test device of heat collector runner according to claim 1, it is characterized in that: on the inlet pipeline of described water supply connector (4), be equiped with the first threeway (15), water supply connector (4), waterflood system (7) and pressure charging system (8) are connected with the upper corresponding interface of the first threeway (15) respectively.
3. the vertical automatic pressure test device of heat collector runner according to claim 1, it is characterized in that: on described water injecting pipeline (71), be equiped with the second threeway (14), the inlet pipeline of reserve tank (81) is connected with this second threeway (14), is positioned on the inlet pipeline of reserve tank (81) of reserve tank (81) and is equiped with ball-cock assembly (85).
4. the vertical automatic pressure test device of heat collector runner according to claim 1, is characterized in that: on the outlet pipeline of described water out adapter (5), be equiped with the tensimeter (18) for showing the pressure in heat collector runner.
5. the vertical automatic pressure test device of heat collector runner according to claim 1, it is characterized in that: on the outlet pipeline of described water out adapter (5), be equiped with for monitoring the outlet pipeline supervising device (51) whether full packages flows out, this supervising device (51) is connected with the signal input part communication of controller (13).
6. the vertical automatic pressure test device of heat collector runner according to claim 1, it is characterized in that: the bottom of described reserve tank (81) is equiped with blowdown apparatus (19), this blowdown apparatus (19) is by the blow-off pipe (191) being connected with reserve tank (81), the second solenoid valve (192) being installed on blow-off pipe (191) forms, and the second solenoid valve (192) is connected with controller (13) communication.
7. according to the vertical automatic pressure test device of heat collector runner described in claim 1, it is characterized in that: on described support (1), be also provided with the control hand valve (6) of controlling the first drive unit (2) and the second drive unit (3).
CN201410387007.3A 2014-08-07 2014-08-07 Heat collector channel vertical type automatic pressure testing machine Pending CN104180955A (en)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1647317A1 (en) * 1988-06-17 1991-05-07 Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции Method of monitoring corrosion of heat-exchanger tubes
CN201653657U (en) * 2010-02-04 2010-11-24 深圳市鹏桑普太阳能股份有限公司 Multifunctional heat collector board core air tightness pressure testing device
CN201765100U (en) * 2010-02-10 2011-03-16 徐贤胜 Leakage detecting unit for sealed pipeline and leakage detecting device with same
CN201765099U (en) * 2010-08-17 2011-03-16 北京昌日新能源科技有限公司 Pressure test connecting part and pressure test blocking part for flow channel of flat plate collector
CN202075103U (en) * 2011-01-25 2011-12-14 天津市金润天太阳能科技有限公司 Fully automatic pressurizing device for solar heat collector board core
CN204064591U (en) * 2014-08-07 2014-12-31 广东五星太阳能股份有限公司 The vertical automatic pressure test device of heat collector runner

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1647317A1 (en) * 1988-06-17 1991-05-07 Киевский Политехнический Институт Им.50-Летия Великой Октябрьской Социалистической Революции Method of monitoring corrosion of heat-exchanger tubes
CN201653657U (en) * 2010-02-04 2010-11-24 深圳市鹏桑普太阳能股份有限公司 Multifunctional heat collector board core air tightness pressure testing device
CN201765100U (en) * 2010-02-10 2011-03-16 徐贤胜 Leakage detecting unit for sealed pipeline and leakage detecting device with same
CN201765099U (en) * 2010-08-17 2011-03-16 北京昌日新能源科技有限公司 Pressure test connecting part and pressure test blocking part for flow channel of flat plate collector
CN202075103U (en) * 2011-01-25 2011-12-14 天津市金润天太阳能科技有限公司 Fully automatic pressurizing device for solar heat collector board core
CN204064591U (en) * 2014-08-07 2014-12-31 广东五星太阳能股份有限公司 The vertical automatic pressure test device of heat collector runner

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