CN116659761B - Pneumatic test platform for single-double U-shaped connectors of ground source heat pump - Google Patents
Pneumatic test platform for single-double U-shaped connectors of ground source heat pump Download PDFInfo
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- CN116659761B CN116659761B CN202310684783.9A CN202310684783A CN116659761B CN 116659761 B CN116659761 B CN 116659761B CN 202310684783 A CN202310684783 A CN 202310684783A CN 116659761 B CN116659761 B CN 116659761B
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- 238000001514 detection method Methods 0.000 claims abstract description 194
- 239000002184 metal Substances 0.000 claims description 98
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 39
- 238000003825 pressing Methods 0.000 claims description 38
- 230000001360 synchronised effect Effects 0.000 claims description 26
- 238000001125 extrusion Methods 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000007547 defect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 210000001503 joint Anatomy 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002650 habitual effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
- G01M3/06—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool
- G01M3/08—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds
- G01M3/085—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by observing bubbles in a liquid pool for pipes, cables or tubes; for pipe joints or seals; for valves; for welds for pipe joints or seals
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The utility model belongs to the technical field of detection, and particularly provides a single-double U joint pneumatic test platform of a ground source heat pump, which solves the problem that in the prior art, air tightness detection cannot be carried out on a plurality of short pipes on the single-double U joint at the same time.
Description
Technical Field
The utility model relates to the technical field of detection, in particular to a single-double U-joint pneumatic test platform of a ground source heat pump.
Background
The U-shaped joint for the ground source heat pump is a joint used for being connected between the ground source heat pump and a heat supply pipeline, a single U-shaped joint is connected to the joint, and double short pipes are connected to the joint, and because the short pipes are in U-shaped distribution and are arranged at one end of the joint, the U-shaped joint is called as a U-shaped joint according to the distribution mode of the short pipes, the single short pipe forms a branch in the joint, the double short pipes are communicated with each other in two phases in the joint to form two branches, and according to the heat supply environment and the heat supply requirement, the single U-shaped joint or the double U-shaped joint can be selectively used for butt joint when butt joint is implemented on the heat source pipeline.
After the U-shaped joint is spliced with the heat source pipeline through the short pipe at the end part for a period of time, the air pressure can be increased along with the unstable air pressure of the heat source, the impact and other reasons, and if a gap exists between the short pipe of the U-shaped joint and the heat pipeline, the air leakage phenomenon can occur. Chinese patent application publication No. CN202329956U, entitled: the inventor considers that the pneumatic test platform of the single-double U joint of the ground source heat pump disclosed in the patent application is only used for detecting whether the welding part of the single-double U joint (the single-double U joint product per se) leaks air or not, but in the prior art, the air tightness of a plurality of short pipes on the single-double U joint cannot be detected at the same time, and if the single-double U joint is applied to the situation that the air tightness between the short pipe on the single-double U joint and the ground source heat pipe is poor, the air pressure of the whole pipeline is influenced.
Disclosure of Invention
Aiming at the problem that the air tightness between the short pipe on the single-double U joint and the ground source heat pipe is detected when the short pipe on the single-double U joint is applied to the ground source pipeline and is connected with the ground source heat pipe, if the air tightness between the single-double U joint and the ground source heat pipe is poor, the air pressure of a pipeline is affected, the utility model provides a single-double U joint pneumatic test platform of a ground source heat pump. (hereinafter referred to as "tube to be inspected" is referred to as "short tube on single-double-U joint" in the background art).
The technical scheme of the utility model is that the single-double U joint pneumatic test platform of the ground source heat pump comprises a bottom plate and a vertical frame fixed on the bottom plate, wherein an air cylinder is fixed at the top end of the vertical frame, a carrying platform is fixed at the bottom end of the vertical frame, a water tank filled with clean water is fixed at the top of the carrying platform, a metal detection tube is fixed in the water tank, a positioning seat positioned below the air cylinder is arranged in the vertical frame, a vertically upward slide rail is fixed at the top end of the carrying platform, the positioning seat is a long slat, a feeding part is arranged at the front end of the positioning seat, a slide seat is arranged at the rear end of the positioning seat and is in sliding fit on the slide rail, the front end of the feeding part protrudes upward, the front of the feeding part is a gradually upward inclined plane, a part clamping face vertical to the top surface of the positioning seat is arranged at the rear of the feeding part, a positioning frame is fixed on the vertical frame, a positioning roller is arranged on the positioning frame and is positioned at the rear side of the positioning seat, the top end of the carrying platform is fixedly provided with two piston cylinders which are symmetrical to two sides of the water tank, the pistons are slidably matched with the piston cylinders, an air inlet pipe is connected between the piston cylinders and the metal detection pipes, at least two groups of the metal detection pipes are respectively arranged at two positions, the two metal detection pipes at the same side are respectively arranged at the same piston cylinder at the same side, the two metal detection pipes at the same side are jointly connected with the same piston cylinder at the same side, each metal detection pipe is sleeved with a detection unit cover which can move up and down along the metal detection pipe, a detection space is formed between the detection unit cover and the metal detection pipes, a plurality of observation holes are formed in the detection unit cover, the inner ends of the observation holes are communicated with the detection space, the outer ends of the observation holes are communicated with the water tank, a U-shaped joint to be detected is arranged on the positioning seat, the U-shaped joint to be detected is vertically downward, and are respectively on the same vertical axis with the four metal detection pipes.
As a further preferred option, the positioning frame is a telescopic frame, and the positioning frame can drive the positioning roller to adjust back and forth.
As a further preferable mode, the loading platform is provided with connecting holes, the number of the connecting holes is consistent with that of the metal detection tubes, the top ends of the metal detection tubes are higher than the top ends of the detection unit covers, the bottom ends of the two metal detection tubes on the same side penetrate through the bottom ends of the loading platform, and the two metal detection tubes on the same side are connected with the piston cylinder on the same side after being connected with the pipeline from the bottom ends of the loading platform.
As a further preferable aspect, the actuating rod of the cylinder is provided with a pressing seat, the pressing seat is positioned above the positioning seat, and the bottom surface of the pressing seat is parallel to the top surface of the positioning seat.
As a further preferred mode, the detection unit cover is of a circular ring structure, the number of the observation holes is several, one quarter of the positions of the outer circular surface of the detection unit cover are arranged on the detection unit cover, sliding holes are formed in the middle of the detection unit cover, the detection unit cover is arranged on the metal detection pipe in a lifting sliding mode through the sliding holes, a first reset spring is sleeved on the metal detection pipe, the top end of the first reset spring is connected to the bottom surface of the detection unit cover, the bottom end of the first reset spring is connected to the bottom surface of an inner cavity of the water tank, the elastic strength of the first reset spring is larger than the tight fit degree between the pipe to be detected and the metal detection pipe when the pipe to be detected slides downwards along the metal detection pipe, a second reset spring is arranged in the piston cylinder, the bottom end of the second reset spring is connected to the bottom surface of the inner cavity of the piston cylinder, the top end of the second reset spring is connected to the piston, and a gas spring is connected between the rear end of the bottom surface of the positioning seat and the top surface of the loading platform.
As a further preferable mode, a circle of height cones are arranged on the bottom surface of the detection unit cover in an annular array mode, the height cones are located in the detection space, the height of each height cone is one half of the height of the detection space, and an exhaust gap is reserved between every two adjacent height cones.
As a further preferred mode, a synchronous pressing seat is arranged in the vertical frame and is suspended between the positioning seat and the water tank, a guide sleeve is arranged at the front end of the synchronous pressing seat, limiting blocks are respectively fixed at the front end and the rear end of the bottom surface of the positioning seat, guide posts are fixed on the bottom surfaces of the limiting blocks at the front end, the guide posts are in sliding fit in the guide sleeve, connecting rods are respectively fixed at the two sides of the rear end of the synchronous pressing seat, the two connecting rods are symmetrically arranged and respectively face the directions of the two piston cylinders after being bent, the two connecting rods are respectively fixedly connected with pistons in the two piston cylinders, two groups of limiting blocks are fixed on the top surface of the synchronous pressing seat, the bottom surfaces of the two limiting blocks are located above the limiting blocks, and the distance between the bottom surfaces of the two limiting blocks and the top surfaces of the limiting blocks is equal to the distance between the bottom end of a tube to be detected and the top end of the metal detection tube.
As a further preferable mode, the connecting rod is a double-section L-shaped bent rod, one end of the connecting rod horizontally extends above the water tank and then is connected to the synchronous pressing seat, and the other end of the connecting rod vertically extends above the water tank and then is downwards bent outside the water tank and then is connected to the piston.
Compared with the prior art, the utility model has the advantages that when the pipe to be detected descends along the metal detection pipe and is subjected to airtight detection, gas is discharged into the detection unit cover along the space between the metal detection pipe and the pipe to be detected (the pipe to be detected is a short pipe mentioned in the background art), then bubbles are generated in the detection unit cover through the detection holes of the detection unit cover, the detection unit covers are independently arranged at a certain position of the water tank along with the metal detection pipe where the detection unit covers are positioned, therefore, when one pipe to be detected on the U-shaped joint detects bubbles, most of the bubbles are concentrated on the detection unit cover spliced by the pipe to be detected, then bubbles are generated by the detection holes formed in the detection unit cover in an independent direction, so that detection personnel can more pertinently observe which pipe to detect the air leakage defect according to the detection unit cover generated by the bubbles, the detection efficiency is improved, the metal detection pipe is multiple, the air leakage defect can be detected simultaneously by utilizing the one-time pressing action of the air cylinder, and the air leakage detection efficiency can be further improved when the pipe to be detected along with the metal detection pipe to be detected, and the air leakage detection pipe is further improved in a three-way when the air leakage detection is realized, and the air leakage detection is realized.
Drawings
Fig. 1 is a first structural schematic diagram of a ground source heat pump single-double-U-joint pneumatic test platform according to an embodiment of the present utility model;
fig. 2 is a second structural schematic diagram of a single-double U-joint pneumatic test platform of a ground source heat pump according to an embodiment of the present utility model;
fig. 3 is a schematic structural diagram of the ground source heat pump single-double-U joint pneumatic test platform according to the embodiment of the present utility model when the water cabin is removed;
fig. 4 is an enlarged schematic diagram of a portion a of the ground source heat pump single-double-U-joint pneumatic test platform according to the embodiment of the present utility model, which is led out from fig. 3;
FIG. 5 is a schematic view of a detecting unit cover in a single-double U-joint pneumatic test platform of a ground source heat pump according to an embodiment of the present utility model;
FIG. 6 is a schematic diagram of a piston cylinder of a single-double U-joint pneumatic test platform of a ground source heat pump in the embodiment of the utility model;
fig. 7 is a schematic structural diagram of the ground source heat pump single-double-U-joint pneumatic test platform according to the embodiment of the present utility model under another view angle led out from fig. 1;
fig. 8 is a schematic diagram of the working principle of the ground source heat pump single-double-U-joint pneumatic test platform according to the embodiment of the utility model;
fig. 9 is a schematic diagram of a ground source heat pump single-double-U joint pneumatic test platform according to an embodiment of the present utility model when a slide rail is fully cut and a positioning frame is partially cut from a bottom view angle led out in fig. 3;
fig. 10 is a schematic structural diagram of a ground source heat pump with a single-double U joint pneumatic test platform according to an embodiment of the present utility model in a bottom view of a water tank;
fig. 11 is an enlarged view of the B part of fig. 9, to show the positioning frame being adjustable back and forth.
In the figure: 1. a bottom plate; 2. a vertical frame; 3. a cylinder; 4. a loading platform; 41. a slide rail; 42. a connection hole; 5. a water tank; 6. a metal detection tube; 7. a positioning seat; 71. a feed section; 72. a slide; 73. an inclined plane; 74. a component clamping surface; 75. a limiting block; 76. a guide post; 8. a positioning frame; 81. positioning rollers; 9. a piston cylinder; 91. a piston; 10. an air inlet pipe; 11. a detection unit cover; 111. an observation hole; 112. a height cone; 12. a detection space; 13. extruding a base; 14. a first return spring; 200. the U-shaped joint to be tested; 100. a tube to be inspected; 15. a second return spring; 16. synchronous pressing seat; 161. guide sleeve; 162. a connecting rod; 163. a limit protrusion; 17. and a gas spring.
Detailed Description
The foregoing and other embodiments and advantages of the utility model will be apparent from the following, more complete, description of the utility model, taken in conjunction with the accompanying drawings. It will be apparent that the described embodiments are merely some, but not all, embodiments of the utility model.
In one embodiment, as shown in fig. 1-10.
The utility model provides a pneumatic test platform of single or double U joint of ground source heat pump, it includes bottom plate 1 and the grudging post 2 of fixing on bottom plate 1, the top of grudging post 2 is fixed with cylinder 3, the bottom mounting of grudging post 2 has year platform 4, the top of year platform 4 is fixed with the sump 5 that is equipped with the clear water, be fixed with metal detection tube 6 in the sump 5, be equipped with the positioning seat 7 that is located cylinder 3 below in the grudging post 2, the top of year platform 4 is fixed with the slide rail 41 that makes progress vertically, positioning seat 7 is the rectangular board, the front end of positioning seat 7 is equipped with feed portion 71, the rear end of positioning seat 7 is equipped with slide 72, slide 72 sliding fit is on slide rail 41, the front end of feed portion 71 makes progress the arch, the front of feed portion 71 is the inclined plane 73 that makes progress gradually, the rear of feed portion 71 is equipped with the part joint face 74 that is perpendicular with the top surface of positioning seat 7, the vertical frame 2 is fixedly provided with a positioning frame 8, the positioning frame 8 is provided with a positioning roller 81, the positioning roller 81 is positioned at the rear side of the positioning seat 7, the top end of the loading platform 4 is fixedly provided with two piston cylinders 9 which are symmetrical to the two sides of the water tank 5, a piston 91 is in sliding fit in the piston cylinders 9, an air inlet pipe 10 is connected between the piston cylinders 9 and the metal detection pipes 6, at least two groups of the metal detection pipes 6 are respectively arranged at two positions, the two metal detection pipes 6 at the same side are respectively arranged at one piston cylinder 9 at the same side, the two metal detection pipes 6 at the same side are jointly connected with the same piston cylinder 9 at the same side, the metal detection pipes 6 are respectively sleeved with a detection unit cover 11, the detection unit cover 11 can move along the metal detection pipes 6 in a lifting mode, a detection space 12 is formed between the detection unit cover 11 and the metal detection pipes 6, a plurality of observation holes 111 are formed in the detection unit cover 11, the inner end of the observation hole 111 is communicated with the detection space 12, the outer end of the observation hole 111 is communicated with the water tank 5, the U-shaped joint 200 to be detected is arranged on the positioning seat 7, and the four pipes 100 to be detected on the U-shaped joint 200 to be detected are vertically downward and are respectively on the same vertical axis with the four metal detection pipes 6. The outer diameter of the metal detection tube 6 is enough to simulate a third-party heat pipe, and the metal detection tube is simulated to be in butt joint with the tube 100 to be detected on the U-shaped joint 200 to be detected during detection.
In this embodiment, the U-shaped joint 200 to be tested is pushed onto the positioning seat 7 along the feeding portion 71 at the front end of the positioning seat 7, at this time, the bottom surface of the U-shaped joint 200 to be tested is attached to the top surface of the positioning seat 7, the rear surface of the U-shaped joint 200 to be tested is supported by the positioning roller 81, the front end of the U-shaped joint 200 to be tested is limited by the component clamping surface 74, both sides of the U-shaped joint 200 to be tested are limited by two groups of tubes 100 carried by the bottom surface itself, thereby positioning the U-shaped joint 200 to be tested under the cylinder 3, the actuating rod of the cylinder 3 is lowered, and the pressing seat 13 at the bottom end of the actuating rod is utilized to implement the pressing action of the U-shaped joint 200 to be tested, when the U-shaped joint 200 to be tested is pressed down, the positioning seat 7 is synchronously lowered, and under the damping of the gas spring 17 and under the rolling assistance of the slide seat 72 along the slide rail 41 and the positioning roller 81 can ensure that the U-shaped joint 200 to be tested is stably lowered, the U-shaped joint 200 to be tested descends to the position that the pipe 100 to be tested at the bottom is butted with the metal detection pipe 6 and then enters the detection unit cover 11 and pushes the detection unit cover 11 to continuously descend along the metal detection pipe 6, meanwhile, the pistons 91 in the two piston cylinders 9 synchronously descend, gas in the piston cylinders 9 is injected into the metal detection pipe 6 along the gas inlet pipe 10 in the descending process, the metal detection pipe 6 sends the gas into the pipe 100 to be tested, the gas generates air pressure in the U-shaped joint 200 to be tested, if the inner wall of the pipe cavity of the pipe 100 to be tested has defects, or the pipe cavity of the pipe 100 to be tested generates plastic deformation due to the deformation when the pipe cavity of the pipe 100 to be tested is connected to the U-shaped joint 200 by a hot melting process, the pipe 100 to be tested descends along the metal detection pipe 6 and is discharged into the detection unit cover 11 between the metal detection pipe 6 and the pipe 100 to be tested in an airtight manner, then, bubbles are generated in the detection unit cover 11 through the observation holes 111 on the detection unit cover 11, and because the detection unit covers 11 are independently arranged at a certain position of the water tank 5 along with the metal detection pipe 6 where the detection unit covers 11 are positioned, when a certain pipe 100 to be detected on the U-shaped joint 200 to be detected detects bubbles, most of the bubbles are concentrated on the detection unit cover 11 inserted by the pipe 100 to be detected, and then the observation holes 111 independently arranged on the detection unit cover 11 are concentrated at a certain local position in clean water to generate bubbles, so that a detector can more pertinently observe which pipe 100 to be detected has a leakage defect according to the detection unit cover 11 generating the bubbles. The metal detection tube 6 has a plurality of positions, and can simultaneously detect whether the plurality of tubes 100 to be detected have air leakage defects in actual use by one-time pressing action of the air cylinder 3, thereby improving the detection efficiency. The metal detection tube 6 simulates a third-party heat pipe, the tube to be detected 100 slides downwards along the outer wall of the metal detection tube 6 in a tightly sliding mode during detection, and the air leakage phenomenon of the tube to be detected 100 can be detected in a piston type air pressing mode, so that whether leakage is defective or not is judged when the tube to be detected 100 is connected with the third-party heat pipe during simulation in actual use.
As shown in fig. 9 and 11, the positioning frame 8 is a telescopic frame, and is formed by telescoping an inner part and an outer part, an outer pipe is fixed on the vertical frame 2, when the inner pipe stretches and moves along the outer pipe, the positioning roller 81 can be elastically supported on the rear surface of the U-shaped joint 200 to be tested to form a rear limit, and the positioning frame 8 can drive the positioning roller 81 to perform front-back adjustment movement and then position self-locking, namely, the rear end positioning of the positioning seat 7 has adjustability, the rear side positioning of the U-shaped joint 200 to be tested in various specifications can be satisfied, the telescopic principle of the positioning frame 8 refers to a telescopic pipe, a spring is filled in the telescopic pipe, a bolt or a locking bolt for performing position locking after stretching is installed on the telescopic pipe on the outer layer, other telescopic principles can be adopted, and the existing telescopic technology is not repeated. When the single U joint with a narrow front-back size can be detected in a telescopic mode, the locating frame 8 is adjusted forwards through telescopic characteristics, and then the locating roller 81 is in rolling contact with the rear face of the single U joint to achieve locating.
The loading platform 4 is provided with connecting holes 42, the number of the connecting holes 42 is consistent with that of the metal detection tubes 6, the top ends of the metal detection tubes 6 are higher than the top ends of the detection unit covers 11, the bottom ends of the two metal detection tubes 6 on the same side penetrate through the bottom ends of the loading platform 4, and the two metal detection tubes 6 on the same side are connected with the piston cylinder 9 on the same side after being connected with a pipeline from the bottom ends of the loading platform 4.
The action bars of the air cylinders 3 are provided with extrusion seats 13 which are used for extruding the tops of the U-shaped connectors 200 to be tested in the descending and extending movement process, the extrusion seats 13 are positioned above the positioning seats 7, and the bottom surfaces of the extrusion seats 13 are parallel to the top surfaces of the positioning seats 7.
As shown in fig. 3-5, the detecting unit cover 11 is in a circular ring structure, the number of the observing holes 111 is several, a quarter of the positions of the plurality of observing holes 111 along the outer circular surface of the detecting unit cover 11 are arranged on the detecting unit cover 11, sliding holes are arranged in the middle of the detecting unit cover 11, the detecting unit cover 11 is matched on the metal detecting tube 6 through the sliding of the arranged sliding holes in a lifting mode, a first reset spring 14 is sleeved on the metal detecting tube 6, the top end of the first reset spring 14 is connected on the bottom surface of the detecting unit cover 11, the bottom end of the first reset spring 14 is connected on the bottom surface of an inner cavity of the water tank 5, the elastic strength of the first reset spring 14 is larger than the tight fitting degree between the detecting tube 100 and the metal detecting tube 6 when the detecting tube 100 slides downwards along the metal detecting tube 6, after the detecting tube 100 slides downwards along the metal detecting tube 6 and is detected in the sliding process, a pressing seat 13 is reset upwards from the top end of the U-shaped connector 200 to be detected, when the top end of the U-shaped connector 200 to be detected loses pressing, the first reset spring 14 releases elasticity upwards, the top end of the first reset spring is connected on the bottom surface of the metal detecting tube 6 through the upper end of the upper reset spring, the upper end of the first reset spring 14 is pushed upwards, the piston seat is connected with the second reset spring 9, the piston 15 is positioned on the bottom surface of the upper end of the piston seat 9, and the piston 15 is positioned on the bottom surface of the piston seat 9, and the piston seat is positioned between the piston seat and the piston seat 9 when the piston is connected to the bottom surface is reset to the top end of the piston seat 9, and the piston seat 9 is positioned on the bottom surface and the bottom surface of the top end of the piston seat 9.
As shown in fig. 5, a circle of height cones 112 are arranged on the bottom surface of the detection unit cover 11 in an annular array, the height cones 112 are located in the detection space 12, when the bottom end of the tube 100 to be detected is inserted into the detection space 12, the bottom end of the tube 100 to be detected is propped against the height cones 112, and as the height of the height cones 112 is half of the height of the detection space 12, when the bottom end of the tube 100 to be detected is propped against the height cones 112 to push the detection unit cover 11 to descend, once the pipe cavity of the tube 100 to be detected has defects such as deformation and the like, and when an air leakage gap is formed between the tube and the metal detection tube 6 to be detected and the air is exhausted downwards, air passes through the exhaust gap between the two adjacent height cones 112 and is effectively exhausted into the detection unit cover 11, and then is exhausted into clear water around the observation hole 111 on the detection unit cover 11, so that bubbles are generated.
In another embodiment, as shown in fig. 3, 4 and 8, a synchronous pressing seat 16 is disposed in the stand 2, the synchronous pressing seat 16 is suspended between the positioning seat 7 and the water tank 5, a guide sleeve 161 is disposed at the front end of the synchronous pressing seat 16, two limiting blocks 75 are respectively fixed at the front end and the rear end of the bottom surface of the positioning seat 7, a guide post 76 is fixed on the bottom surface of the limiting block 75 at the front end, the guide posts 76 are slidably matched in the guide sleeve 161, two connecting rods 162 are respectively fixed at two sides of the rear end of the synchronous pressing seat 16, the two connecting rods 162 are symmetrically disposed, after respectively bending towards the directions of the two piston cylinders 9, are respectively fixedly connected with the pistons 91 in the two piston cylinders 9, two groups of limiting protrusions 163 are fixed on the top surface of the synchronous pressing seat 16, the bottom surfaces of the two limiting blocks 75 are located above the limiting protrusions 163, and the distance between the bottom surfaces of the two limiting blocks 75 and the top surfaces of the limiting protrusions 163 is equal to the distance between the bottom end of the tube 100 to be inspected and the top end of the metal detection tube 6.
In this embodiment, when the positioning seat 7 carries the U-shaped connector 200 to be tested and needs to be lowered to a certain position, the tube 100 to be tested on the U-shaped connector 200 to be tested is in contact with the metal detection tube 6, so that a detection distance is reserved between the bottom end of the tube 100 to be tested and the metal detection tube 6, when the detection of the U-shaped connector 200 to be tested is completed and the positioning seat 7 is reset and raised, a material returning space can be reserved between the bottom end of the tube 100 to be tested and the top end of the metal detection tube 6, so that the detected U-shaped connector 200 to be tested is conveniently taken outwards from the front end of the positioning seat 7, and when the U-shaped connector 200 to be tested is lowered to be in contact with the positioning seat 7 and the bottom end of the tube 100 to be tested is in contact with the top end of the metal detection tube 6, the two limiting blocks 75 on the bottom surface of the positioning seat 7 are just in contact with the limiting protrusions 163 on the top surface of the synchronous pressing seat 16, and the limiting protrusions 163 are propped against the limiting blocks 75 to force the synchronous pressing seat 16 to continuously descend along with the continuous descending action of the positioning seat 7, so that the synchronous pressing seat 16 can simultaneously descend along with the two connecting rods 162 in the descending process, the purpose of downwards pressing and exhausting in the piston cylinder 9 is achieved by driving the two pistons 91 through the two connecting rods 162, namely, even if the two piston cylinders 9 automatically exhaust, gas is fed into the metal detection tube 6 through the gas inlet tube 10, and the purpose of automatic gas leakage detection is achieved when the tube 100 to be detected on the U-shaped joint 200 descends along the metal detection tube 6.
The connecting rod 162 is a double-section L-shaped bent rod, one end of the connecting rod 162 extends horizontally above the water tank 5 and is connected to the synchronous pressing seat 16, the other end of the connecting rod 162 extends vertically above the water tank 5 and then bends downwards outside the water tank 5 and is connected to the piston 91, and when the connecting rod 162 descends along with the synchronous pressing seat 16, a bending part of the connecting rod 162, which is close to the synchronous pressing seat 16, can enter the water tank 5, so that the descending stroke of the piston 91 in the piston cylinder 9 is improved by the connecting rod 162, and when the tube to be detected 100 continues to slide downwards along the outer wall of the metal detection tube 6 and air leakage detection is carried out, the piston cylinder 9 can provide enough detection gas for the metal detection tube 6 through the air inlet pipe 10.
Working principle: the operator pushes the U-shaped joint 200 to be tested upwards along the inclined plane 73 from the front side of the vertical frame 2, and in the pushing process, the positioning seat 7 is forced to be pressed downwards by utilizing the extrusion relation generated between the bottom surface of the U-shaped joint 200 to be tested and the inclined plane 73, so that the top end of the U-shaped joint 200 to be tested is just limited below the extrusion seat 13 when riding on the positioning seat 7, meanwhile, the two to-be-tested pipes 100 on the bottom surface of the U-shaped joint 200 to be tested (when the U-shaped joint 200 to be tested is a single U-shaped joint, the two to-be-tested pipes 100 on the bottom surface of the U-shaped joint 200 to be tested are two, when the U-shaped joint 200 to be tested is a double U-shaped joint, the four to-be-tested pipes 100 on the bottom surface of the U-shaped joint are not repeated, the prior product structure is limited on the two sides of the positioning seat 7 respectively, the rear end of the U-shaped joint 200 to be tested is limited by the positioning roller 81, the front end of the U-shaped joint 200 to be tested is limited by the component clamping surface 74, thereby ensuring that the bottom end of the tube to be detected 100 is just corresponding to the upper part of the metal detection tube 6 and is on the same vertical axis with the metal detection tube 6, at the moment, the air cylinder 3 is electrified and is propped against the top surface of the U-shaped joint 200 to be detected through the extrusion seat 13 at the bottom end, the U-shaped joint 200 to be detected is forced to descend, when the U-shaped joint 200 to be detected descends, the tube to be detected 100 with the bottom of the U-shaped joint 200 to be detected is carried down, the positioning seat 7 is pushed to descend in the descending process, the positioning seat 7 is in descending process, not only is the rear end formed into a rear side stable guide by sliding fit of the sliding seat 72 on the sliding rail 41, but also a front side stable guide is formed by the guide pillar 76 at the front end of the bottom surface of the positioning seat 7 in a descending way along the guide sleeve 161, when the limiting blocks 75 at the two ends of the bottom surface of the positioning seat 7 are descended to be contacted with the limiting projections 163 at the top end of the synchronous pressing seat 16, the bottom end of the tube to be detected 100 is just contacted with the top end of the metal detection tube 6, the U-shaped joint 200 to be tested pushes the positioning seat 7 to continuously descend under the action of the air cylinder 3, at the moment, the positioning seat 7 pushes the whole synchronous pressing seat 16 to descend through the limiting block 75 on the bottom surface, the tube 100 to be tested slides downwards along the corresponding metal detection tube 6, the detection unit cover 11 is pushed downwards along the metal detection tube 6 by utilizing the bottom end top in the detection unit cover 11 in the process of sliding downwards, simultaneously the synchronous pressing seat 16 simultaneously descends with the two connecting rods 162, the two pistons 91 are respectively descended in the two piston cylinders 9 by utilizing the tail ends of the two connecting rods 162, so that gas in the two piston cylinders 9 is automatically injected into the metal detection tube 6 along the air inlet pipe 10, then the gas enters the tube 100 to be tested along the metal detection tube 6, when the U-shaped joint 200 to be tested is in a single U shape, the U-shaped joint 200 to be tested is in two tubes 100 to be tested, if plastic deformation occurs on the inner walls of the tube cavities of the two tubes to be detected 100 when the two tubes to be detected are welded to the U-shaped joint 200, a matching gap may be formed between the inner walls of the tube cavities of the two tubes to be detected 100 and the outer wall of the metal detection tube 6, when gas enters the two tubes to be detected 100, the two tubes to be detected 100 form air pressure due to internal intercommunication, the air passes through the matching gap formed between the tubes to be detected 100 and the metal detection tube 6 and blows into the detection unit cover 11 on the metal detection tube 6, the air is collected by the detection unit cover 11 and then discharged into clear water through the tiny observation holes 111, at this time, a surge effect occurs in the local position of the detection unit cover 11, and according to the position of the sliding effect, the problem of the tube to be detected 100 can be intuitively observed. When the detected U-shaped joint 200 is double U-shaped, the detected U-shaped joint 200 is four tubes 100 to be detected, and if the inner walls of the tube cavities of the four tubes 100 to be detected deform due to plastic deformation when the four tubes are welded to the U-shaped joint 200 to be detected, the detection is completed in a manner of butting with the four metal detection tubes 6 in the detection manner. When the four detection tubes 100 have the air leakage phenomenon, the air leakage phenomenon can be fed back to the detection unit covers 11 on the four metal detection tubes 6 for detection, and because the positions of the observation holes 111 formed on the two adjacent detection unit covers 11 are different, the detection unit covers 11 exhaust outwards through the observation holes 111, and the surge positions in the clean water are different, so that the fact that the air leakage problem is caused on one detection tube 100 on one metal detection tube 6 where one detection unit cover 11 is positioned can be judged according to the surge position in the clean water, and the reworking and the replacement of the qualified detection tubes 100 are facilitated when the joint is produced in batch. The detection mode shows that the power component is only one cylinder 3, so that the loss is reduced. The air leakage phenomenon of a plurality of tubes 100 to be detected can be detected simultaneously by one pressing action, so that the detection efficiency is improved.
The above-described orientation is not intended to represent a specific orientation of each component in the present embodiment, but is merely provided to facilitate description of the embodiments, and is set by referring to the orientation in the drawings, and it is essential that the specific orientation of each component be described according to the actual installation and actual use thereof and the orientation that is habitual to a person skilled in the art, and this is described.
The above-described embodiments are provided to further explain the objects, technical solutions, and advantageous effects of the present utility model in detail. It should be understood that the foregoing is only illustrative of the present utility model and is not intended to limit the scope of the present utility model. It should be noted that any modifications, equivalent substitutions, improvements, etc. made by those skilled in the art without departing from the spirit and principles of the present utility model are intended to be included in the scope of the present utility model.
Claims (8)
1. A pneumatic test platform for a single-double U joint of a ground source heat pump is characterized by comprising a bottom plate (1) and a vertical frame (2) fixed on the bottom plate (1), wherein an air cylinder (3) is fixed at the top end of the vertical frame (2), a carrying platform (4) is fixed at the bottom end of the vertical frame (2), a water tank (5) filled with clean water is fixed at the top of the carrying platform (4), a metal detection tube (6) is fixed in the water tank (5), a positioning seat (7) positioned below the air cylinder (3) is arranged in the vertical frame (2), a vertical sliding rail (41) is fixed at the top end of the carrying platform (4), the positioning seat (7) is a long slat, a feeding part (71) is arranged at the front end of the positioning seat (7), a sliding seat (72) is arranged at the rear end of the positioning seat (7), the sliding seat (72) is in sliding fit on the sliding rail (41), the front end of the feeding part (71) is upward protruded, the front of the feeding part (71) is a slope (73) which is gradually inclined upwards, a part (74) perpendicular to the top surface of the positioning seat (7) is arranged in the rear of the vertical sliding seat, a part (74) positioned on the top surface of the positioning seat (8), a positioning roller (81) is positioned on the vertical positioning seat (8), the top end of the carrying platform (4) is fixedly provided with two piston cylinders (9) which are symmetrical to two sides of the water tank (5), the piston cylinders (9) are slidably matched with pistons (91), an air inlet pipe (10) is connected between each piston cylinder (9) and each metal detection tube (6), at least two groups of the metal detection tubes (6) are arranged, the two groups of the metal detection tubes (6) are respectively arranged at two positions, the two metal detection tubes (6) at the same side are respectively arranged at one piston cylinder (9) at the same side, the two metal detection tubes (6) at the same side are commonly connected with the same piston cylinder (9) at the same side, the metal detection tubes (6) are respectively sleeved with a detection unit cover (11), the detection unit cover (11) can move up and down along the metal detection tube (6), a detection space (12) is formed between the detection unit cover (11) and the metal detection tube (6), a plurality of observation holes (111) are formed in the detection unit cover (11), the inner ends of the observation holes (111) are communicated with the detection space (12), the outer ends of the observation holes (111) are communicated with the water tank (5), the opening positions of the observation holes (111) on two adjacent detection unit covers (11) are mutually far away, a U-shaped joint (200) to be detected is placed on the positioning seat (7), the four pipes (100) to be detected on the U-shaped joint (200) to be detected are vertically downward, and are respectively on the same vertical axis with the four metal detection tubes (6).
2. The ground source heat pump single-double U joint pneumatic test platform according to claim 1, wherein the positioning frame (8) is a telescopic frame, and the positioning frame (8) can drive the positioning roller (81) to adjust back and forth.
3. The ground source heat pump single-double U joint pneumatic test platform according to claim 2, wherein the carrying platform (4) is provided with connecting holes (42), the number of the connecting holes (42) is consistent with that of the metal detection tubes (6), the top ends of the metal detection tubes (6) are higher than the top ends of the detection unit covers (11), the bottom ends of the two metal detection tubes (6) on the same side penetrate through the bottom ends of the carrying platform (4), and the two metal detection tubes (6) on the same side are connected on a piston cylinder (9) on the same side together after being connected with a pipeline from the bottom end of the carrying platform (4).
4. A ground source heat pump single-double-U joint pneumatic test platform according to claim 3, characterized in that the action bars of the air cylinders (3) are provided with extrusion seats (13), the extrusion seats (13) are positioned above the positioning seats (7), and the bottom surfaces of the extrusion seats (13) are parallel to the top surfaces of the positioning seats (7).
5. The ground source heat pump single-double U joint pneumatic test platform according to claim 4, wherein the detection unit cover (11) is of a circular ring structure, the observation holes (111) are a plurality of, the quarter of the outer circle surface of the detection unit cover (11) is provided with the detection unit cover (11) along the observation holes (111), the middle part of the detection unit cover (11) is provided with the sliding hole, the detection unit cover (11) is slidably matched on the metal detection tube (6) through the sliding hole, the metal detection tube (6) is sleeved with the first reset spring (14), the top end of the first reset spring (14) is connected on the bottom surface of the detection unit cover (11), the bottom end of the first reset spring (14) is connected on the bottom surface of the inner cavity of the water tank (5), the elastic strength of the first reset spring (14) is larger than the tightness between the metal detection tube (100) and the metal detection tube (6) when the metal detection tube (6) slides downwards, the piston cylinder (9) is internally provided with the second reset spring (15), the bottom end of the second reset spring (15) is connected on the bottom surface of the piston cylinder (9), and the top end of the second reset spring (15) is connected with the top surface of the piston cylinder (17) and is positioned between the top ends of the piston cylinder (7).
6. The ground source heat pump single-double U joint pneumatic test platform according to claim 5, wherein a circle of height cones (112) are arranged on the bottom surface of the detection unit cover (11) in an annular array mode, the height cones (112) are located in the detection space (12), the height of each height cone (112) is one half of the height of the detection space (12), and an exhaust gap is reserved between every two adjacent height cones (112).
7. The ground source heat pump single-double U joint pneumatic test platform according to claim 6, wherein a synchronous pressing seat (16) is arranged in the vertical frame (2), the synchronous pressing seat (16) is suspended between the positioning seat (7) and the water tank (5), guide sleeves (161) are arranged at the front end of the synchronous pressing seat (16), a limiting block (75) is respectively fixed at the front end and the rear end of the bottom surface of the positioning seat (7), guide posts (76) are fixed on the bottom surface of the limiting block (75) at the front end, the guide posts (76) are in sliding fit in the guide sleeves (161), one connecting rod (162) is respectively fixed at the two sides of the rear end of the synchronous pressing seat (16), the two connecting rods (162) are symmetrically arranged, after the two connecting rods (162) are respectively bent towards the directions of the two piston cylinders (9), the two connecting rods are respectively fixedly connected with the pistons (91) in the two piston cylinders (9), the top surfaces of the synchronous pressing seat (16) are fixedly provided with front limiting projections and the rear limiting projections (163), the bottom surfaces of the two limiting blocks (75) are respectively located above the limiting projections (163), the bottom surfaces of the two limiting blocks (75) are located above the top surfaces of the limiting projections, and the bottom surfaces of the two limiting blocks (75) are equal to the distance between the top surfaces of the two limiting projections (163) and the top surfaces of the limiting blocks is equal to the distance between the top ends of the metal tube (100.
8. The ground source heat pump single-double U joint pneumatic test platform according to claim 7, wherein the connecting rod (162) is a double-section L-shaped bent rod, one end of the connecting rod (162) horizontally extends above the water tank (5) and then is connected to the synchronous pressing seat (16), and the other end of the connecting rod (162) vertically extends above the water tank (5) and then is downwards bent outside the water tank (5) and then is connected to the piston (91).
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| CN202310684783.9A CN116659761B (en) | 2023-06-12 | 2023-06-12 | Pneumatic test platform for single-double U-shaped connectors of ground source heat pump |
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| CN202310684783.9A CN116659761B (en) | 2023-06-12 | 2023-06-12 | Pneumatic test platform for single-double U-shaped connectors of ground source heat pump |
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| CN116659761B true CN116659761B (en) | 2023-10-24 |
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| CN117006340B (en) * | 2023-10-07 | 2024-01-09 | 山东华翼绿色生态发展有限公司 | Pipe fitting connecting equipment for installation of vertical ground source heat pump deep well |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033079A (en) * | 2010-11-15 | 2011-04-27 | 南京大学 | Instrument and method for testing stratum in-situ thermal property of ground source heat pump and heat exchange quantity of buried pipe |
| CN202329956U (en) * | 2011-11-14 | 2012-07-11 | 联塑市政管道（河北）有限公司 | Pneumatic testing platform for single/double-U joint of ground source heat pump |
| CN204694654U (en) * | 2014-12-31 | 2015-10-07 | 江苏南华地下空间研究所有限公司 | Combined type ground source heat pump rock soil thermal physical property and buried pipe heat exchange capacity tester |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102033079A (en) * | 2010-11-15 | 2011-04-27 | 南京大学 | Instrument and method for testing stratum in-situ thermal property of ground source heat pump and heat exchange quantity of buried pipe |
| CN202329956U (en) * | 2011-11-14 | 2012-07-11 | 联塑市政管道（河北）有限公司 | Pneumatic testing platform for single/double-U joint of ground source heat pump |
| CN204694654U (en) * | 2014-12-31 | 2015-10-07 | 江苏南华地下空间研究所有限公司 | Combined type ground source heat pump rock soil thermal physical property and buried pipe heat exchange capacity tester |
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