CN111854197A - Geothermal heat exchange storage device and use method thereof - Google Patents
Geothermal heat exchange storage device and use method thereof Download PDFInfo
- Publication number
- CN111854197A CN111854197A CN202010754278.3A CN202010754278A CN111854197A CN 111854197 A CN111854197 A CN 111854197A CN 202010754278 A CN202010754278 A CN 202010754278A CN 111854197 A CN111854197 A CN 111854197A
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- rod
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- connecting rod
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24T—GEOTHERMAL COLLECTORS; GEOTHERMAL SYSTEMS
- F24T10/00—Geothermal collectors
- F24T10/10—Geothermal collectors with circulation of working fluids through underground channels, the working fluids not coming into direct contact with the ground
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/082—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys
- F28F21/083—Heat exchange elements made from metals or metal alloys from steel or ferrous alloys from stainless steel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a geothermal heat exchange storage device and a using method thereof. The invention has the beneficial effects that: the utility model discloses a heat exchanger, including mounting sleeve, first screw rod, first slide bar, the tip of stainless steel heat transfer bellows is fixed in the inside of mounting sleeve through limit structure earlier, rotate first screw rod again, threaded connection between first screw rod and the first slide bar, sliding connection between first slide bar and the mounting block, the one end of first slide bar is equipped with the connector, first screw rod rotates and then drives the inside slip of first slide bar at the mounting block, and then the distance between mounting block and the fixed block has been adjusted, the mounting sleeve and then with the inseparable block of connector, adjust the regulation structure again, the angle of adjustment connector, mounting structure through mounting sleeve and on the mounting sleeve is in the same place stainless steel heat transfer bellows and connector zonulae occludens, the stainless steel heat transfer bellows has effectively been prevented from dro.
Description
Technical Field
The invention relates to a storage device, in particular to a geothermal heat exchange storage device and a using method thereof, and belongs to the technical field of geothermal heat exchange equipment.
Background
With the continuous development of the economic level of China and the improvement of scientific technology, people pay more attention to the heating of clean energy, geothermal energy is stored underground, the geothermal energy is natural heat energy extracted from the earth crust and is used, and geothermal water is converted into usable energy through heat exchange equipment.
In the geothermal heat exchange tube and the geothermal heat exchange device in the prior art, heat exchange is carried out between heat exchange fluid in a stainless steel heat exchange corrugated tube and hot water in a geothermal water pool; the connection structure of the stainless steel heat exchange corrugated pipe at the joint is not specifically disclosed, and the stainless steel heat exchange corrugated pipe easily falls off at the joint to influence the normal operation of the geothermal heat exchange device.
Disclosure of Invention
The invention aims to solve the problems and provides a geothermal heat exchange storage device and a using method thereof.
The invention achieves the aim through the following technical scheme that the geothermal heat exchange storage device comprises a mounting sleeve and a mounting structure fixed on the mounting sleeve, the mounting structure comprises a mounting block, a first sliding rod, a fixed block and a first screw rod, the mounting block is arranged on one side of the mounting sleeve, the first slide bar is arranged in the mounting block and is connected with the mounting block in a sliding way, the first screw rod is arranged in the first sliding rod and is in threaded connection with the first sliding rod, the first screw rod is rotationally connected with the mounting block, the end part of the first slide bar is provided with the fixed block, the two fixing blocks are respectively fixedly connected to the connector, the section of the side wall of the end part of the connector is of a convex structure, and the section of the side wall of one end, close to the connector, of the mounting sleeve is of a concave structure; one side of the mounting sleeve is provided with a limiting structure; one end of the mounting sleeve is provided with an adjusting structure.
Preferably, in order to facilitate the rotation of the first screw rod, the mounting structure further comprises a rocker, the rocker is arranged at the end part of the first screw rod, and the rocker is detachably connected with the first screw rod.
Preferably, in order to limit the stainless steel heat exchange corrugated pipe conveniently, the limiting structure comprises an installation frame, an adjusting block, a second sliding rod, a second screw rod, a limiting plate, a pull rod and a limiting block, the installation frame is arranged on one side of the installation sleeve, the adjusting block is arranged on one side of the installation frame, the second sliding rod is arranged inside the adjusting block, the second sliding rod is connected with the adjusting block in a sliding manner, the second screw rod is arranged inside the second sliding rod, the second screw rod is connected with the second sliding rod in a threaded manner, the second screw rod is connected with the adjusting block in a rotating manner, the limiting plate is arranged on one side, away from the adjusting block, of the second sliding rod, the plurality of pull rods are arranged on one side, away from the second sliding rod, of the limiting plate, one end, away from the limiting plate, of the pull rod is connected to the limiting block, the stopper is located the inside of installation cover, the stopper with sliding connection between the installation cover.
Preferably, in order to adjust the angle of the connector, the adjusting structure includes a first connecting rod, a rotating shaft, a second connecting rod, a gear, a rack and a third screw rod, the first connecting rod is disposed at one end of the mounting sleeve at one end of the connector, the second connecting rod is disposed at one end of the mounting sleeve at the other end of the connector, the rotating shaft is disposed inside the first connecting rod, the rotating shaft is rotatably connected to the first connecting rod, the other end of the rotating shaft is disposed inside the second connecting rod, the rotating shaft is welded to the second connecting rod, the rotating shaft is fixedly connected to the gear, the gear is disposed inside the first connecting rod, the rack is disposed at the bottom end of the gear, the rack is engaged with the gear, and the rack is slidably connected to the first connecting rod, the third screw rod is arranged inside the rack, the third screw rod is in threaded connection with the rack, and the third screw rod is in rotational connection with the first connecting rod.
Preferably, in order to facilitate the rotation of the second screw, the cross section of the second screw is a T-shaped structure, and arc-shaped grooves are symmetrically formed in the end portion of the second screw.
Preferably, in order to fix the adjusting structure, a mounting plate is arranged at the bottom end of the first connecting rod, and the cross section of the mounting plate is of an L-shaped structure.
A method of using a geothermal heat exchange storage device, comprising the steps of:
s1, rotating the second screw to drive the second slide bar to slide in the adjusting block, so that the limiting plate, the pull rod and the limiting block at the bottom end of the second slide bar slide, and the limiting block fixes the end of the stainless steel heat exchange corrugated pipe in the mounting sleeve;
s2, rotating the first screw rod, enabling the first screw rod to be in threaded connection with the first slide rod, enabling the first slide rod to be in sliding connection with the mounting block, enabling a fixing block and a connector to be arranged at one end of the first slide rod, enabling the first screw rod to rotate to drive the first slide rod to slide in the mounting block, further adjusting the distance between the mounting block and the fixing block, and enabling the mounting sleeve to be tightly clamped with the connector;
s3, the third screw rod is rotated, the third screw rod is in threaded connection with the rack, the third screw rod rotates to further drive the rack to slide in the first connecting rod, the rack slides to further drive the gear to rotate, the gear rotates to drive the rotating shaft to rotate, the rotating shaft rotates to further drive the second connecting rod to rotate, the angle between the first connecting rod and the second connecting rod is further adjusted, the angle of the connector is further adjusted, and the stainless steel heat exchange corrugated pipe is tightly connected with the connector through the installation sleeve and the installation structure on the installation sleeve.
The invention has the beneficial effects that: the utility model discloses a heat exchanger, including mounting sleeve, first screw rod, first slide bar, the tip of stainless steel heat transfer bellows is fixed in the inside of mounting sleeve through limit structure earlier, rotate first screw rod again, threaded connection between first screw rod and the first slide bar, sliding connection between first slide bar and the mounting block, the one end of first slide bar is equipped with fixed block and connector, first screw rod rotates and then drives first slide bar and slide in the inside of mounting block, and then the distance between mounting block and the fixed block has been adjusted, the mounting sleeve and then with the inseparable block of connector, readjust the regulation structure, the angle of adjustment connector, mounting structure through mounting sleeve and on the mounting sleeve is in the same place stainless steel heat transfer bellows and connector zonulae occludens, the stainless steel heat transfer bellows has effectively been prevented from dro.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of a connection structure between the mounting sleeve and the limiting structure shown in FIG. 1;
FIG. 3 is a schematic view of the connection structure of the adjustment structure shown in FIG. 1 to a mounting plate;
fig. 4 is a schematic view of a connection structure of the first screw and the first slide bar shown in fig. 1.
In the figure: 1. the mounting structure comprises a mounting sleeve, 2, a connector, 3, a mounting structure, 31, a mounting block, 32, a first slide bar, 33, a fixing block, 34, a first screw rod, 35, a rocker, 4, a limiting structure, 41, a mounting frame, 42, an adjusting block, 43, a second slide bar, 44, a second screw rod, 45, a limiting plate, 46, a pull rod, 47, a limiting block, 5, an adjusting structure, 51, a first connecting rod, 52, a rotating shaft, 53, a second connecting rod, 54, a gear, 55, a rack, 56, a third screw rod, 6 and a mounting plate.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a geothermal heat exchanging and storing device and a using method thereof include a mounting sleeve 1 and a mounting structure 3 fixed on the mounting sleeve 1, where the mounting structure 3 includes a mounting block 31, a first slide bar 32, a fixing block 33 and a first screw 34, the mounting block 31 is disposed at one side of the mounting sleeve 1, the first slide bar 32 is disposed inside the mounting block 31, the first slide bar 32 is slidably connected with the mounting block 31, the first screw 34 is disposed inside the first slide bar 32, the first screw 34 is in threaded connection with the first slide bar 32, the first screw 34 is rotatably connected with the mounting block 31, the fixing block 33 is disposed at an end of the first slide bar 32, two fixing blocks 33 are disposed, the two fixing blocks 33 are respectively and fixedly connected to a connector 2, the section of the side wall of the end part of the connector 2 is of a convex structure, and the section of the side wall of one end, close to the connector 2, of the mounting sleeve 1 is of a concave structure; one side of the mounting sleeve 1 is provided with a limiting structure 4; one end of the mounting sleeve 1 is provided with an adjusting structure 5.
As a technical optimization scheme of the present invention, the mounting structure 3 further includes a rocker 35, the rocker 35 is disposed at an end of the first screw 34, and the rocker 35 is detachably connected to the first screw 34.
As a technical optimization scheme of the present invention, the limiting structure 4 includes an installation frame 41, an adjusting block 42, a second sliding rod 43, a second screw 44, a limiting plate 45, a pull rod 46 and a limiting block 47, the installation frame 41 is disposed on one side of the installation sleeve 1, the adjusting block 42 is disposed on one side of the installation frame 41, the second sliding rod 43 is disposed inside the adjusting block 42, the second sliding rod 43 is slidably connected with the adjusting block 42, the second screw 44 is disposed inside the second sliding rod 43, the second screw 44 is in threaded connection with the second sliding rod 43, the second screw 44 is rotatably connected with the adjusting block 42, the limiting plate 45 is disposed on one side of the second sliding rod 43 away from the adjusting block 42, the plurality of pull rods 46 are disposed on one side of the limiting plate 45 away from the second sliding rod 43, one end of the pull rod 46 away from the limiting plate 45 is connected to the limiting block 47, the limiting block 47 is arranged inside the mounting sleeve 1, and the limiting block 47 is connected with the mounting sleeve 1 in a sliding mode.
As a technical optimization scheme of the present invention, the adjusting structure 5 includes a first connecting rod 51, a rotating shaft 52, a second connecting rod 53, a gear 54, a rack 55 and a third screw 56, the first connecting rod 51 is disposed at one end of the mounting sleeve 1 at one end of the connecting head 2, the second connecting rod 53 is disposed at one end of the mounting sleeve 1 at the other end of the connecting head 2, the rotating shaft 52 is disposed inside the first connecting rod 51, the rotating shaft 52 is rotatably connected to the first connecting rod 51, the other end of the rotating shaft 52 is disposed inside the second connecting rod 53, the rotating shaft 52 is welded to the second connecting rod 53, the rotating shaft 52 is fixedly connected to the gear 54, the gear 54 is disposed inside the first connecting rod 51, the rack 55 is disposed at the bottom end of the gear 54, and the rack 55 is engaged with the gear 54, the rack 55 is slidably connected with the first connecting rod 51, the third screw 56 is arranged inside the rack 55, the third screw 56 is in threaded connection with the rack 55, and the third screw 56 is rotatably connected with the first connecting rod 51.
As a technical optimization scheme of the present invention, the cross section of the second screw 44 is a T-shaped structure, and the end of the second screw 44 is symmetrically provided with arc-shaped grooves.
As a technical optimization scheme of the present invention, a mounting plate 6 is disposed at a bottom end of the first connecting rod 51, and a cross section of the mounting plate 6 is an L-shaped structure.
When the invention is used, firstly, the second screw 44 is rotated, the second screw 44 drives the second slide bar 43 to slide in the adjusting block 42, so that the limit plate 45, the pull rod 46 and the limit block 47 at the bottom end of the second slide bar 43 slide, the limit block 47 further fixes the end part of the stainless steel heat exchange corrugated pipe in the mounting sleeve 1, then the first screw 34 is rotated, the first screw 34 is in threaded connection with the first slide bar 32, the first slide bar 32 is in sliding connection with the mounting block 31, one end of the first slide bar 32 is provided with the fixed block 33 and the connector 2, the first screw 34 rotates to drive the first slide bar 32 to slide in the mounting block 31, further the distance between the mounting block 31 and the fixed block 33 is adjusted, the mounting sleeve 1 is tightly clamped with the connector 2, then the third screw 56 is rotated, the third screw 56 is in threaded connection with the rack 55, the third screw 56 rotates to drive the rack 55 to slide in the first connecting bar 51, the rack 55 slides and then drives the gear 54 to rotate, the gear 54 rotates and drives the rotating shaft 52 to rotate, the rotating shaft 52 rotates and then drives the second connecting rod 53 to rotate, and then the angle between the first connecting rod 51 and the second connecting rod 53 is adjusted, and then the angle of the connector 2 is adjusted, the stainless steel heat exchange corrugated pipe and the connector 2 are tightly connected together through the mounting sleeve 1 and the mounting structure 3 on the mounting sleeve 1, the stainless steel heat exchange corrugated pipe is effectively prevented from falling off, and then the normal operation of the geothermal heat exchange device is kept.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (7)
1. A geothermal heat exchange storage device comprising a mounting sleeve (1) and a mounting structure (3) fixed to the mounting sleeve (1), characterized in that: the mounting structure (3) comprises a mounting block (31), a first sliding rod (32), a fixed block (33) and a first screw rod (34), the mounting block (31) is arranged on one side of the mounting sleeve (1), the mounting block (31) is internally provided with the first sliding rod (32), the first sliding rod (32) is in sliding connection with the mounting block (31), the first sliding rod (32) is internally provided with the first screw rod (34), the first screw rod (34) is in threaded connection with the first sliding rod (32), the first screw rod (34) is in rotating connection with the mounting block (31), the end part of the first sliding rod (32) is provided with the fixed block (33), the fixed block (33) is provided with two fixed blocks (33) which are respectively and fixedly connected with the connector (2), the cross section of the side wall of the end part of the connector (2) is of a convex structure, the section of the side wall of one end, close to the connector (2), of the mounting sleeve (1) is of a concave structure; one side of the mounting sleeve (1) is provided with a limiting structure (4); one end of the mounting sleeve (1) is provided with an adjusting structure (5).
2. A geothermal heat exchange storage apparatus according to claim 1, wherein: the mounting structure (3) further comprises a rocker (35), the rocker (35) is arranged at the end part of the first screw rod (34), and the rocker (35) is detachably connected with the first screw rod (34).
3. A geothermal heat exchange storage apparatus according to claim 1, wherein: the limiting structure (4) comprises an installation frame (41), an adjusting block (42), a second sliding rod (43), a second screw rod (44), a limiting plate (45), a pull rod (46) and a limiting block (47), the installation frame (41) is arranged on one side of the installation sleeve (1), the adjusting block (42) is arranged on one side of the installation frame (41), the second sliding rod (43) is arranged inside the adjusting block (42), the second sliding rod (43) is connected with the adjusting block (42) in a sliding mode, the second screw rod (44) is arranged inside the second sliding rod (43), the second screw rod (44) is connected with the second sliding rod (43) in a threaded mode, the second screw rod (44) is connected with the adjusting block (42) in a rotating mode, the limiting plate (45) is arranged on one side, deviating from the adjusting block (42), of the second sliding rod (43), limiting plate (45) deviate from one side of second slide bar (43) is equipped with a plurality ofly pull rod (46), pull rod (46) deviate from the one end of limiting plate (45) connect in stopper (47), stopper (47) are located the inside of installation cover (1), stopper (47) with sliding connection between installation cover (1).
4. A geothermal heat exchange storage apparatus according to claim 1, wherein: the adjusting structure (5) comprises a first connecting rod (51), a rotating shaft (52), a second connecting rod (53), a gear (54), a rack (55) and a third screw rod (56), wherein the first connecting rod (51) is arranged at one end of the mounting sleeve (1) at one end of the connector (2), the second connecting rod (53) is arranged at one end of the mounting sleeve (1) at the other end of the connector (2), the rotating shaft (52) is arranged in the first connecting rod (51), the rotating shaft (52) is rotationally connected with the first connecting rod (51), the other end of the rotating shaft (52) is arranged in the second connecting rod (53), the rotating shaft (52) is welded with the second connecting rod (53), the rotating shaft (52) is fixedly connected with the gear (54), the gear (54) is arranged in the first connecting rod (51), the bottom end of the gear (54) is provided with the rack (55), the rack (55) is meshed with the gear (54), the rack (55) is connected with the first connecting rod (51) in a sliding mode, the third screw (56) is arranged inside the rack (55), the third screw (56) is connected with the rack (55) in a threaded mode, and the third screw (56) is connected with the first connecting rod (51) in a rotating mode.
5. A geothermal heat exchange storage apparatus according to claim 3, wherein: the section of the second screw rod (44) is of a T-shaped structure, and arc-shaped grooves are symmetrically formed in the end portion of the second screw rod (44).
6. A geothermal heat exchange storage apparatus according to claim 4, wherein: the bottom of first connecting rod (51) is equipped with mounting panel (6), the cross-section of mounting panel (6) is L shape structure.
7. A method for using a geothermal heat exchange storage device is characterized in that: the method comprises the following steps:
s1, firstly, by rotating the second screw (44), the second screw (44) drives the second slide bar (43) to slide in the adjusting block (42), so that the limiting plate (45), the pull rod (46) and the limiting block (47) at the bottom end of the second slide bar (43) slide, and the limiting block (47) further fixes the end part of the stainless steel heat exchange corrugated pipe in the mounting sleeve (1);
s2, rotating the first screw (34), enabling the first screw (34) to be in threaded connection with the first sliding rod (32), enabling the first sliding rod (32) to be in sliding connection with the mounting block (31), enabling a fixing block (33) and the connector (2) to be arranged at one end of the first sliding rod (32), enabling the first screw (34) to rotate to further drive the first sliding rod (32) to slide in the mounting block (31), further adjusting the distance between the mounting block (31) and the fixing block (33), and enabling the mounting sleeve (1) to be tightly clamped with the connector (2);
s3, the third screw rod (56) is rotated, the third screw rod (56) is in threaded connection with the rack (55), the third screw rod (56) rotates to drive the rack (55) to slide inside the first connecting rod (51), the rack (55) slides to drive the gear (54) to rotate, the gear (54) rotates to drive the rotating shaft (52) to rotate, the rotating shaft (52) rotates to drive the second connecting rod (53) to rotate, the angle between the first connecting rod (51) and the second connecting rod (53) is adjusted, the angle of the connector (2) is adjusted, and the stainless steel heat exchange corrugated pipe is tightly connected with the connector (2) through the installation sleeve (1) and the installation structure (3) on the installation sleeve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754278.3A CN111854197B (en) | 2020-07-30 | 2020-07-30 | Geothermal heat exchange storage device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010754278.3A CN111854197B (en) | 2020-07-30 | 2020-07-30 | Geothermal heat exchange storage device and use method thereof |
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| Publication Number | Publication Date |
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| CN111854197A true CN111854197A (en) | 2020-10-30 |
| CN111854197B CN111854197B (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010754278.3A Active CN111854197B (en) | 2020-07-30 | 2020-07-30 | Geothermal heat exchange storage device and use method thereof |
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| US7617963B1 (en) * | 2008-08-08 | 2009-11-17 | Ge-Hitachi Nuclear Energy Americas Llc | Apparatus and method for repairing welded elbow joints in a core spray line |
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| Publication number | Publication date |
|---|---|
| CN111854197B (en) | 2021-11-16 |
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