CN214248283U - Self-tightening inner sealing structure of high-pressure manhole of compressed air heat exchanger - Google Patents

Self-tightening inner sealing structure of high-pressure manhole of compressed air heat exchanger Download PDF

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Publication number
CN214248283U
CN214248283U CN202023169756.9U CN202023169756U CN214248283U CN 214248283 U CN214248283 U CN 214248283U CN 202023169756 U CN202023169756 U CN 202023169756U CN 214248283 U CN214248283 U CN 214248283U
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China
Prior art keywords
manhole
heat exchanger
compressed air
air heat
self
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CN202023169756.9U
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Chinese (zh)
Inventor
洪增元
许亚东
崔艳艳
王铎
赵云云
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Harbin Turbine Co Ltd
Harbin Turbine Auxiliary Equipment Engineering Co Ltd
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Harbin Turbine Co Ltd
Harbin Turbine Auxiliary Equipment Engineering Co Ltd
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Priority to CN202023169756.9U priority Critical patent/CN214248283U/en
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Abstract

A self-tightening inner sealing structure for a high-pressure manhole of a compressed air heat exchanger relates to the technical field of compressed air heat exchangers. The utility model provides a manhole structure of current pressure vessel have that internals is many and manufacturing procedure is complicated to and dismantle inconvenient problem. The utility model discloses a cartridge is taken over at heat exchanger high pressure manhole to the manhole, be sealing connection between outer wall and the heat exchanger high pressure manhole hole is taken over to the manhole, the outside terminal surface setting of manhole is taken over and is drawn the ring, the inside terminal surface of manhole is taken over and is set up the manhole apron, it is fixed through drawing piece and manhole cover connection to draw the ring, the manhole is taken over and is equipped with wedge-shaped sealing pad and O type sealing pad from interior to exterior between the recess of mutually supporting with the manhole apron in proper order, link assembly sets up and takes over the inboard at the manhole, link assembly's one end and manhole are taken over the articulated connection of inner wall, link assembly's the other end and manhole cover inner wall articulate and are connected. The utility model is used for well pressure, high-pressure compressed air heat exchanger's manhole is sealed.

Description

Self-tightening inner sealing structure of high-pressure manhole of compressed air heat exchanger
Technical Field
The utility model relates to a compressed air heat exchanger technical field, concretely relates to seal structure in compressed air heat exchanger high pressure manhole self-tightening formula.
Background
Abnormal conditions of the pressure container often occur in long-term operation, the pressure container needs to be checked and analyzed in time, and shutdown maintenance is needed when the fault is serious; meanwhile, the power plant needs to regularly maintain and overhaul the interior of the container, particularly the accessories in the power plant need to be overhauled, and maintenance personnel need to frequently enter and exit the container during overhauling. The manhole is a passage into the pressure vessel and is the most important compression element of the pressure vessel. In order to meet the requirements of process operation conditions, production and manufacturing and the like, the reasonable design and selection of the sealing structure are the key points for ensuring the safe and effective operation of the heat exchanger. In addition, carry out reasonable optimization to the manhole structure, also can let the maintenance personal more convenient and fast ground business turn over jar body, provide the assurance for promoting maintenance efficiency. Therefore, the manhole structure has the characteristics of good sealing performance and simple installation and disassembly procedures, has better universality on domestic conventional thermal power, nuclear power and new products, and can better meet the requirements of users.
In summary, the manhole structure of the existing pressure vessel has the problems of many internal parts, complex processing procedures and inconvenient disassembly.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the manhole structure of current pressure vessel and having many and manufacturing procedure complicacy of internals to and dismantle inconvenient problem, and then provide a seal structure in compressed air heat exchanger high pressure manhole self-tightening formula.
The technical scheme of the utility model is that:
the utility model provides a seal structure in compressed air heat exchanger high pressure manhole self-clinching formula, seal structure in compressed air heat exchanger high pressure manhole self-clinching formula includes that manhole takeover 2, and manhole takeover 2 is circular tubular structure, and 2 cartridges are in heat exchanger high pressure manhole, and be sealing connection between 2 outer walls and the heat exchanger high pressure manhole hole is taken over to the manhole, seal structure in compressed air heat exchanger high pressure manhole self-clinching formula still includes and draw system ring 1, wedge sealed pad 3, manhole apron 4, O type sealed pad 5, draw the piece, flat cover otic placode 9 and link assembly, and manhole apron 4 is circular platelike structure, and manhole takeover 2 outside terminal surface sets up and draws system ring 1, and draw system ring 1 is annular platelike structure, and manhole apron 4 internal end sets up manhole apron 4 in manhole, and draw system ring 1 and manhole apron 4 to be connected fixedly through drawing the piece, and be equipped with wedge sealed pad 3 and O type sealed pad 5 from inside to outside in proper order between the recess that manhole takeover 2 and manhole apron 4 mutually supported The connecting rod assembly is arranged on the inner side of the manhole connecting pipe 2, one end of the connecting rod assembly is hinged to the inner wall of the manhole connecting pipe 2, and the other end of the connecting rod assembly is hinged to the inner wall of the manhole cover plate 4.
Further, the self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger further comprises a lifting bolt 6, a first threaded hole is formed in the center of the upper end face of the manhole cover plate 4, and the lifting bolt 6 is spirally installed in the first threaded hole of the manhole cover plate 4.
Further, the number of the pulling members is 8, and the 8 pulling members are arranged around the lifting bolt 6 in an annular array.
Furthermore, each of the restraining pieces comprises a restraining bolt 7 and a nut 8, a through hole is formed in the end face of the restraining ring 1, a second threaded hole corresponding to the through hole of the restraining ring 1 is formed in the outer wall of the manhole cover plate 4, one end of the restraining bolt 7 is in threaded connection with the second threaded hole of the manhole cover plate 4, the other end of the restraining bolt 7 penetrates through the through hole of the restraining ring 1, and the other end of the restraining bolt 7 extends out of part of the restraining ring 1 and is in threaded connection with the nut 8.
Further, the connecting rod component comprises a first pin shaft 10a, a first connecting rod 11a, a second pin shaft 10b, a second connecting rod 11b, a third pin shaft 10c and two connecting pipe ear plates 12, wherein the two connecting pipe ear plates 12 are respectively arranged on the inner walls of the manhole cover plate 4 and the manhole connecting pipe 2, one end of the first connecting rod 11a is hinged to the connecting pipe ear plate 12 on the inner wall of the manhole cover plate 4 through the first pin shaft 10a, one end of the second connecting rod 11b is hinged to the connecting pipe ear plate 12 on the inner wall of the manhole connecting pipe 2 through the third pin shaft 10c, and the other ends of the first connecting rod 11a and the second connecting rod 11b are hinged to each other through the second pin shaft 10 b.
Furthermore, a rectangular groove is formed in the outer wall of the manhole cover plate 4 along the radial direction, and an O-shaped sealing gasket 5 is installed in the rectangular groove.
Further, the round platform is processed to 4 excircles of manhole cover plate near the one end of pin ring 1, the round platform side is the sealing ring contact surface, and the one end that the round platform is close to eyebolt 6 is the minor diameter end, installs wedge sealed pad 3 between sealing ring contact surface and the manhole takeover 2.
Further, be equipped with the boss on the inside wall of manhole takeover 2, 2 are taken over to the manhole of boss below is equipped with the conical surface, the internal diameter of conical surface from top to bottom dwindles gradually until with the vertical section contact of the lateral wall of manhole apron 4, the aperture of 2 is taken over to the manhole of boss below is unchangeable, 2 is taken over to the manhole from top to bottom gradually reduce the internal diameter and the round platform of manhole apron 4 excircle and passes through the sealed 3 of wedge packing and mutually support.
Further, the O-ring seal 5 is made of high temperature-resistant fluororubber.
Further, the wedge-shaped gasket 3 is made of high-strength flexible graphite +06Cr19Ni 10.
Compared with the prior art, the utility model has the following effect:
1. the utility model discloses seal structure inner structure is simple in the self-tightening formula of compressed air heat exchanger high pressure manhole, and the installation is dismantled portably, improve equipment maintenance efficiency.
2. The utility model discloses a clearance that 2 was taken over to manhole apron 4 and manhole does not receive the sealed influence of filling up 5 of O type, can suitably increase clearance between the two, very big reduction the machining precision requirement that 2 was taken over to manhole apron 4 and manhole.
3. Medium pressure is used in the utility model discloses a sealed 5 of the sealed pad of O type and the sealed 3 combined seal of pad of wedge use in 4 bottoms of manhole cover plate, guarantee the utility model discloses seal structure has good sealing performance in the high-pressure manhole self-tightening formula of compressed air heat exchanger.
4. The utility model discloses a 2 internals are taken over to the manhole is small in quantity, occupation space not, and structure height is little, and the total weight is light, practices thrift the cost.
Drawings
Fig. 1 is the structural schematic diagram of the self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger of the utility model.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1, and the high-pressure manhole self-tightening inner sealing structure of the compressed air heat exchanger of the embodiment comprises a manhole connecting pipe 2, the manhole connecting pipe 2 is of a circular tubular structure, the manhole connecting pipe 2 is inserted into a high-pressure manhole of the heat exchanger, the outer wall of the manhole connecting pipe 2 is in sealing connection with the inner hole of the high-pressure manhole of the heat exchanger, the high-pressure manhole self-tightening inner sealing structure of the compressed air heat exchanger further comprises a drag ring 1, a wedge-shaped sealing gasket 3, a manhole cover plate 4, an O-shaped sealing gasket 5, a drag piece, a flat cover ear plate 9 and a connecting rod assembly, the manhole cover plate 4 is of a circular plate structure, the drag ring 1 is arranged on the outer end surface of the manhole connecting pipe 2, the drag ring 1 is of an annular plate structure, the manhole cover plate 4 is arranged on the inner end surface of the manhole 2, and the drag ring 1 is fixedly connected with the manhole cover plate 4 through the drag piece, a wedge-shaped sealing gasket 3 and an O-shaped sealing gasket 5 are sequentially arranged between grooves matched with the manhole connecting pipe 2 and the manhole cover plate 4 from inside to outside, a connecting rod assembly is arranged on the inner side of the manhole connecting pipe 2, one end of the connecting rod assembly is hinged to the inner wall of the manhole connecting pipe 2, and the other end of the connecting rod assembly is hinged to the inner wall of the manhole cover plate 4.
The second embodiment is as follows: the embodiment is described with reference to fig. 1, the self-tightening inner sealing structure for a high-pressure manhole of a compressed air heat exchanger further includes a lifting bolt 6, a first threaded hole is formed in the center of the upper end surface of the manhole cover plate 4, and the lifting bolt 6 is spirally installed in the first threaded hole of the manhole cover plate 4. Other components and connections are the same as in the first embodiment.
The third concrete implementation mode: referring to fig. 1, the number of the pulling members in the present embodiment is 8, and the 8 pulling members are arranged around the lifting bolt 6 in an annular array. Other compositions and connections are the same as in the first or second embodiments.
The fourth concrete implementation mode: referring to fig. 1, the present embodiment is described, each of the restraining members of the present embodiment includes a restraining bolt 7 and a nut 8, a through hole is formed in an end surface of the restraining ring 1, a second threaded hole corresponding to the through hole of the restraining ring 1 is formed in an outer wall of the manhole cover plate 4, one end of the restraining bolt 7 is in threaded connection with the second threaded hole of the manhole cover plate 4, the other end of the restraining bolt 7 penetrates through the through hole of the restraining ring 1, and the other end of the restraining bolt 7 extends out of the part of the restraining ring 1 and is in threaded connection with the nut 8. So set up, hold back ring 1 and manhole apron 4 through holding back bolt 7 and nut 8 fixed connection to give certain pretightning force. Other compositions and connection relationships are the same as in the first, second or third embodiment.
The fifth concrete implementation mode: the present embodiment is described with reference to fig. 1, the connecting rod assembly of the present embodiment includes a first pin 10a, a first connecting rod 11a, a second pin 10b, a second connecting rod 11b, a third pin 10c, and two pipe connection ear plates 12, where the two pipe connection ear plates 12 are respectively disposed on the inner walls of the manhole cover plate 4 and the manhole pipe connection 2, one end of the first connecting rod 11a is hinged to the pipe connection ear plate 12 on the inner wall of the manhole cover plate 4 through the first pin 10a, one end of the second connecting rod 11b is hinged to the pipe connection ear plate 12 on the inner wall of the manhole pipe connection 2 through the third pin 10c, and the other ends of the first connecting rod 11a and the second connecting rod 11b are hinged to each other through the second pin 10 b. So set up, link assembly can supply to dismantle manhole cover plate 4 when overhauing and adjust the use. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.
The sixth specific implementation mode: referring to fig. 1, the manhole cover plate 4 of the present embodiment is provided with a rectangular groove along the radial direction on the outer wall thereof, and an O-ring seal 5 is installed in the rectangular groove. With this arrangement, the fitting gap between the manhole cover plate 4 and the manhole cover 2 can be increased appropriately due to the presence of the O-ring seal 5. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.
The seventh embodiment: the embodiment is described with reference to fig. 1, a circular truncated cone is machined at one end of the excircle of the manhole cover plate 4, which is close to the containment ring 1, the side surface of the circular truncated cone is a sealing ring contact surface, one end of the circular truncated cone, which is close to the lifting eye screw 6, is a small-diameter end, and a wedge-shaped sealing gasket 3 is installed between the sealing ring contact surface and the manhole connecting pipe 2. Thus, the wedge-shaped gasket 3 and the O-shaped gasket 5 are combined and sealed for use. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.
The specific implementation mode is eight: explaining this embodiment in combination with fig. 1, the manhole of this embodiment is taken over and is equipped with the boss on 2's the inside wall, the manhole of boss below is taken over 2 and is equipped with the conical surface, the internal diameter of conical surface from top to bottom reduces gradually until with the vertical section contact of the lateral wall of manhole apron 4, the aperture of 2 is taken over to the manhole of boss below is unchangeable, the manhole is taken over 2 and is passed through the sealed 3 of wedge packing mutually supporting of round platform of internal diameter and manhole apron 4 excircle that reduces gradually from top to bottom. So set up, sealed pad position department is sealed in manhole takeover and manhole apron installation, is equipped with the conical surface structure of mutually supporting. A certain deformation space is provided for the wedge-shaped sealing gasket 3 and the O-shaped sealing gasket 5, and a prerequisite is provided for the self-tightening effect. Other compositions and connection relationships are the same as those of embodiment one, two, three, four, five, six or seven.
The specific implementation method nine: the present embodiment will be described with reference to fig. 1, and the O-ring seal 5 of the present embodiment is made of high temperature-resistant fluororubber. So set up, pressure is at first acted on O type sealed 5, fills to manhole apron 4 and manhole takeover 2 clearance, plays the first layer sealed effect. Other compositions and connection relationships are the same as those in the first, second, third, fourth, fifth, sixth, seventh or eighth embodiment.
The detailed implementation mode is ten: referring to fig. 1, the wedge-shaped gasket 3 of the present embodiment is made of high-strength flexible graphite +06Cr19Ni10, and the wedge-shaped gasket 3 is formed by winding a layer of flexible graphite and a layer of metal wire. So set up, medium pressure promotes manhole cover plate 4 outwards to move, compresses tightly wedge sealed pad 3, produces the self-tightening effect, forms the sealed effect of second floor. Other compositions and connections are the same as those of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth embodiments. Principle of operation
The working principle of the self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger of the utility model is described with reference to fig. 1: the utility model discloses a sealing mechanism is by the sealed pad 5 of O type in the recess and 3 pressurized and the manhole is taken over 2 inner wall contacts and is realized of wedge sealed pad. At the initial moment, a pretightening force is applied to the manhole cover plate 4 through the restraining bolt 7 and the nut 8 to form initial sealing; when the unit works, medium pressure acts on the manhole cover plate 4 and the O-shaped sealing gasket 5, the pressure acts on the O-shaped sealing gasket 5 firstly, and a gap between the manhole cover plate 4 and the manhole connecting pipe 2 is filled to play a role of first layer sealing; the medium pressure pushes the manhole cover plate 4 to move outwards, the wedge-shaped sealing gasket 3 is compressed, a self-tightening effect is generated, and a second layer of sealing effect is formed. The manhole cover plate 4, the manhole connecting pipe 2 and the sealing ring surface are made into an inclined shape, and a prerequisite condition is established for the self-tightening action. The quick-opening device is quick in opening speed and suitable for quick-opening occasions. When the unit overhauls, take off and hold down bolt 7, nut 8 and hold down ring 1, inside pushing into pressure vessel manhole cover plate 4, connect manhole takeover 2 maintainers through link assembly and can get into the inside inspection of pipe case, overhaul the completion back, need change O type sealed pad 5 and wedge sealed pad 3, lift by crane hold down bolt 7, nut 8 and hold down ring 1, accomplish maintenance work.
The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (10)

1. The utility model provides a seal structure in compressed air heat exchanger high pressure manhole self-clinching formula, seal structure in compressed air heat exchanger high pressure manhole self-clinching formula includes that the manhole takes over (2), and the manhole takes over (2) and is circular tubular structure, and the manhole takes over (2) cartridge and is in heat exchanger high pressure manhole, and the manhole takes over (2) outer wall and heat exchanger high pressure manhole and is sealing connection, its characterized in that between the hole: the high-pressure manhole self-tightening inner sealing structure of the compressed air heat exchanger further comprises a traction ring (1), a wedge-shaped sealing gasket (3), a manhole cover plate (4), an O-shaped sealing gasket (5), a traction piece, a flat cover ear plate (9) and a connecting rod assembly, wherein the manhole cover plate (4) is of a circular plate structure, the traction ring (1) is arranged on the outer end face of the manhole connecting pipe (2), the traction ring (1) is of an annular plate structure, the manhole cover plate (4) is arranged on the inner end face of the manhole connecting pipe (2), the traction ring (1) is fixedly connected with the manhole cover plate (4) through the traction piece, the wedge-shaped sealing gasket (3) and the O-shaped sealing gasket (5) are sequentially arranged between grooves, matched with each other, of the manhole connecting pipe (2) and the manhole cover plate (4) from inside to outside, the connecting rod assembly is arranged on the inner side of the manhole connecting pipe (2), one end of the connecting rod assembly is hinged with the inner wall of the manhole connecting pipe (2), the other end of the connecting rod component is hinged with the inner wall of the manhole cover plate (4).
2. The self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger as claimed in claim 1, wherein: the self-tightening inner sealing structure for the high-pressure manhole of the compressed air heat exchanger further comprises a lifting bolt (6), a first threaded hole is formed in the center of the upper end face of the manhole cover plate (4), and the lifting bolt (6) is spirally installed in the first threaded hole of the manhole cover plate (4).
3. A self-tightening inner sealing structure of a high-pressure manhole of a compressed air heat exchanger according to claim 1 or 2, wherein: the number of the pulling pieces is 8, and the 8 pulling pieces are arranged around the lifting ring screw (6) in an annular array mode.
4. A self-tightening inner sealing structure of a high-pressure manhole of a compressed air heat exchanger according to claim 3, wherein: each restraining part comprises a restraining bolt (7) and a nut (8), a through hole is formed in the end face of the restraining ring (1), a second threaded hole corresponding to the through hole of the restraining ring (1) is formed in the outer wall of the manhole cover plate (4), one end of the restraining bolt (7) is in threaded connection with the second threaded hole of the manhole cover plate (4), the other end of the restraining bolt (7) penetrates through the through hole of the restraining ring (1), and the other end of the restraining bolt (7) extends out of part of the threaded connection nut (8) of the restraining ring (1).
5. The self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger as claimed in claim 1 or 4, wherein: the connecting rod component comprises a first pin shaft (10a), a first connecting rod (11a), a second pin shaft (10b), a second connecting rod (11b), a third pin shaft (10c) and two pipe connection lug plates (12), the two pipe connection lug plates (12) are respectively arranged on the inner walls of the manhole cover plate (4) and the manhole pipe connection (2), one end of the first connecting rod (11a) is hinged to the pipe connection lug plate (12) on the inner wall of the manhole cover plate (4) through the first pin shaft (10a), one end of the second connecting rod (11b) is hinged to the pipe connection lug plate (12) on the inner wall of the manhole cover plate (4) through the third pin shaft (10c), and the other ends of the first connecting rod (11a) and the second connecting rod (11b) are hinged to each other through the second pin shaft (10 b).
6. The self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger as claimed in claim 5, wherein: the outer wall of the manhole cover plate (4) is provided with a rectangular groove along the radial direction, and an O-shaped sealing gasket (5) is arranged in the rectangular groove.
7. The self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger as claimed in claim 6, wherein: the one end processing round platform that manhole apron (4) excircle was close to and draws system ring (1), the round platform side is the sealing ring contact surface, and the one end that the round platform is close to eyebolt (6) is the minor diameter end, installs wedge sealing pad (3) between sealing ring contact surface and the manhole takeover (2).
8. The self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger as claimed in claim 7, wherein: be equipped with the boss on the inside wall that (2) were taken over to the manhole, manhole of boss below is taken over (2) and is equipped with the conical surface, the internal diameter of conical surface from top to bottom reduces gradually until with the vertical section contact of the lateral wall of manhole apron (4), the aperture that (2) were taken over to the manhole of boss below is unchangeable, the round platform that the internal diameter that (2) were taken over gradually from top to bottom and manhole apron (4) excircle were taken over to the manhole passes through wedge seal pad (3) and mutually supports.
9. The self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger as claimed in claim 1, wherein: the O-shaped sealing gasket (5) is made of high-temperature-resistant fluororubber.
10. The self-tightening inner sealing structure of the high-pressure manhole of the compressed air heat exchanger as claimed in claim 1, wherein: the wedge-shaped sealing gasket (3) is made of high-strength flexible graphite +06Cr19Ni 10.
CN202023169756.9U 2020-12-24 2020-12-24 Self-tightening inner sealing structure of high-pressure manhole of compressed air heat exchanger Active CN214248283U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023169756.9U CN214248283U (en) 2020-12-24 2020-12-24 Self-tightening inner sealing structure of high-pressure manhole of compressed air heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023169756.9U CN214248283U (en) 2020-12-24 2020-12-24 Self-tightening inner sealing structure of high-pressure manhole of compressed air heat exchanger

Publications (1)

Publication Number Publication Date
CN214248283U true CN214248283U (en) 2021-09-21

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Application Number Title Priority Date Filing Date
CN202023169756.9U Active CN214248283U (en) 2020-12-24 2020-12-24 Self-tightening inner sealing structure of high-pressure manhole of compressed air heat exchanger

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