CN114441287A - Temporary replacing device for expansion joint of low-temperature pipe and using method - Google Patents
Temporary replacing device for expansion joint of low-temperature pipe and using method Download PDFInfo
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- CN114441287A CN114441287A CN202111517729.2A CN202111517729A CN114441287A CN 114441287 A CN114441287 A CN 114441287A CN 202111517729 A CN202111517729 A CN 202111517729A CN 114441287 A CN114441287 A CN 114441287A
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- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims abstract description 20
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 7
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001934 delay Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0044—Pneumatic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0274—Tubular or ring-shaped specimens
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Abstract
The invention relates to a temporary replacing device for a low-temperature pipe expansion joint and a using method thereof, wherein the temporary replacing device comprises a vertical connecting seat, a horizontal connecting seat, an outer sleeve and an inner sleeve which are connected between the vertical connecting seat and the horizontal connecting seat; one end of the inner sleeve is inserted into the outer sleeve, the length of the inner sleeve inserted into the outer sleeve is adjustable, the outer sleeve is arranged vertical to the vertical connecting seat, and the position of the outer sleeve relative to the vertical connecting seat is adjustable; the vertical connecting seat and the horizontal connecting seat are respectively provided with a pipe joint; when the temporary replacing device is used, the two sections of low-temperature expansion pipes are positioned and subjected to strength test through the temporary replacing device for the expansion joint of the low-temperature pipe. The invention can avoid the damage of the expansion joint in the long-term connection construction of the ship low-temperature pipeline and avoid the damage possibly caused by overhigh pressure when the expansion joint participates in the strength test.
Description
Technical Field
The invention relates to the field of ship construction, in particular to a temporary replacing device for a low-temperature pipe expansion joint and a using method thereof.
Background
In ship construction, expansion joints of low-temperature pipelines are generally outsourced products, the price is high, the problems that the expansion joints are damaged to cause large economic loss and the purchase period delays the construction period are solved, and the rated pressure of the expansion joints is smaller than the strength test pressure and cannot participate in the low-temperature pipeline strength test, so the strength test has to be carried out during construction. Therefore, the device capable of replacing the expansion joint for the low-temperature pipeline strength test is needed, the strength test can be met, and the expansion joint can be prevented from being damaged.
Disclosure of Invention
In order to achieve the technical purpose, the invention provides a temporary replacing device for a cryogenic pipe expansion joint and a using method thereof.
The technical purpose of the invention is realized by the following technical scheme:
a temporary replacing device for a low-temperature pipe expansion joint structurally comprises a vertical connecting seat, a transverse connecting seat, an outer sleeve and an inner sleeve, wherein the outer sleeve and the inner sleeve are connected between the vertical connecting seat and the transverse connecting seat; one end of the inner sleeve is movably inserted into the outer sleeve in a clearance way; the vertical connecting base comprises a first blind flange and a first upright post, and the first upright post is vertically fixed in the center of the first blind flange; the transverse connecting base comprises a second blind flange and a second upright post vertically fixed in the center of the second blind flange; one end of the inner sleeve is fixedly connected with the second upright post; one end of the outer sleeve is connected with a sleeve which is sleeved outside the first upright post; a first connecting device used for limiting the distance between the sleeve and the first blind flange is arranged between the sleeve and the first blind flange; a second connecting device used for limiting the length of the inner sleeve inserted into the outer sleeve is connected between the inner sleeve and the outer sleeve; and the first blind flange and the second blind flange are respectively provided with a pipe connector for strength test.
Furthermore, the side wall of the outer sleeve is also provided with a limiting piece for limiting the length of the inner sleeve inserted into the outer sleeve; the side wall of the outer sleeve is provided with an inner threaded hole for installing the limiting piece, and the limiting piece is inserted into the inner wall of the outer sleeve to abut against the outer wall of the inner sleeve by matching with the inner threaded hole.
Furthermore, at least two first connecting devices are arranged between the first blind flange and the sleeve; at least two second connecting devices are connected between the inner sleeve and the outer sleeve.
Furthermore, the first connecting device comprises a positioning sleeve and a first locking screw rod, one end of the positioning sleeve is vertically fixed on the first blind flange, and the other end of the positioning sleeve is provided with an internal thread blind hole; the two ends of the first locking screw are respectively provided with a left thread section and a right thread section, and the middle part of the first locking screw is provided with a pulling means; the right thread section is inserted into the internal thread blind hole in a matching manner; one side of the sleeve, which is close to the first blind flange, is provided with a flange end; the left thread section passes through the flange end of the sleeve, and the two sides of the left thread section passing through the flange end are respectively provided with a locking nut.
Furthermore, the second connecting device comprises a locking sleeve and a second locking screw rod, one end of the locking sleeve is connected with the outer sleeve, and the other end of the locking sleeve is in threaded connection with one end of the second locking screw rod; the other end of the second locking screw is connected with the inner sleeve.
Furthermore, a stud is arranged at one end of the locking sleeve connected with the outer sleeve, and an external thread is arranged at one end of the second locking screw connected with the inner sleeve; and flange ends are respectively arranged on the outer sleeve and the inner sleeve, and one end of the stud and one end of the second locking screw respectively penetrate through the flange ends of the outer sleeve and the inner sleeve and are locked through nuts.
Furthermore, scale marks are respectively arranged on the outer walls of the first upright post and the inner sleeve.
Furthermore, a connecting pipe is connected between the sleeve and the outer sleeve, one end of the connecting pipe is fixedly connected with the sleeve, a flange joint is arranged at the other end of the connecting pipe, a flange joint is arranged at one end of the outer sleeve, and the connecting pipe and the outer sleeve are fixedly connected through the flange joint.
The use method of the temporary replacement device for the expansion joint of the low-temperature pipe is used for the strength test of the low-temperature expansion pipe; the method comprises the following steps:
s1, adjusting the distance between the sleeve and the first blind flange and the length of the inner sleeve inserted into the outer sleeve according to the position of the low-temperature pipeline joint; after the adjustment is finished, the distance between the sleeve and the first blind flange is fixed through the first connecting device, and the length of the inner sleeve inserted into the outer sleeve is fixed through the second connecting device;
s2, connecting the vertical connecting seat and the horizontal connecting seat to flange joints of two sections of low-temperature expansion pipes respectively;
s3, connecting a hose between pipe joints on the first blind flange and the second blind flange, wherein the hose is communicated with two sections of low-temperature expansion hoses;
s4, filling nitrogen into the low-temperature expansion hose to perform a strength test; and (5) removing the temporary replacing device of the expansion joint of the cryogenic pipe after the strength test is finished.
A method of using a temporary replacement device for a cryogenic pipe expansion joint to position a cryogenic expansion pipe, the method comprising the steps of:
and 4, adjusting the positions of the two cryogenic pipes according to the adjusted temporary replacing device for the cryogenic pipe expansion joints, and connecting the pipe joints of the two cryogenic pipes to the first blind flange and the second blind flange to realize the positioning of the two cryogenic expansion pipes.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention can avoid the damage of the expansion joint caused by improper protection in the long-term connection construction of the low-temperature pipeline of the ship, avoid the possible damage caused by overhigh pressure when the expansion joint participates in the strength test, avoid the economic loss and mainly avoid delaying the completion of the shipbuilding node.
2. The device has the adjustable function, can replace the expansion joint of the cryogenic tank of multiple sizes, also can expand to the interim substitute protection that adapts to the expansion joint of 180 degrees and other angles, and it is simple to use swiftly, can used repeatedly many times, and use cost is lower, can be used to in shipbuilding and non-shipbuilding, uses very extensively.
Drawings
Fig. 1 is a schematic view of a temporary substitution device for a cryogenic pipe expansion joint according to the present invention.
Fig. 2 is a schematic view of the structure of the vertical connecting base in the invention.
Fig. 3 is a schematic structural view of a positioning sleeve in the present invention.
Fig. 4 is a schematic view of the first locking screw structure in the present invention.
Fig. 5 is a schematic view of the sleeve structure of the present invention.
Fig. 6 is a schematic view of the structure of the outer sleeve in the present invention.
Fig. 7 is a schematic view of the inner sleeve structure in the present invention.
Fig. 8 is a schematic view of the structure of the horizontal connecting seat of the present invention.
Fig. 9 is a schematic view of a temporary alternative to the cryogenic pipe expansion joint of the present invention.
Fig. 10 is a schematic view of the locking sleeve construction of the present invention.
In the figure, 1, a vertical connecting seat; 2. a horizontal connecting seat; 3. an outer sleeve; 4. an inner sleeve; 5. a first blind flange; 6. a first upright post; 7. a second blind flange; 8. a second upright post; 9. a sleeve; 10. a first connecting means; 11. a second connecting means; 12. a pipe interface; 13. a limiting member; 14. a positioning sleeve; 15. a first locking screw; 16. a left threaded section; 17. a right thread segment; 18. pulling means; 19. locking the nut; 20. locking the sleeve; 21. a second locking screw; 22. a stud; 23. a nut; 24. an internal threaded blind hole; 25. a hose; 26. a low temperature expansion pipe; 27. and (4) connecting the pipes.
Detailed Description
The technical solution of the present invention is further described below with reference to specific embodiments:
a temporary replacing device for a cryogenic pipe expansion joint is shown in figures 1-10, and structurally comprises a vertical connecting seat 1, a horizontal connecting seat 2, an outer sleeve 3 and an inner sleeve 4 which are connected between the vertical connecting seat and the horizontal connecting seat; one end of the inner sleeve 4 is movably inserted into the outer sleeve 3 in a clearance way; the vertical connecting seat 1 comprises a first blind flange 5 and a first upright post 6, and the first upright post 6 is vertically fixed in the center of the first blind flange 5; the transverse connecting seat 2 comprises a second blind flange 7 and a second upright post 8 vertically fixed in the center of the second blind flange 7; one end of the inner sleeve 4 is connected and fixed with the second upright post 8; one end of the outer sleeve 3 is connected with a sleeve 9, and the sleeve 9 is sleeved outside the first upright post 6; a first connecting device 10 for limiting the distance between the sleeve 9 and the first blind flange 7 is arranged between the sleeve 9 and the first blind flange 7; a second connecting device 11 for limiting the length of the inner sleeve 4 inserted into the outer sleeve 3 is also connected between the inner sleeve 4 and the outer sleeve 3; the first blind flange 5 and the second blind flange 7 are respectively provided with a pipe connector 12 for strength test. At least two first connecting devices 10 are arranged between the first blind flange 5 and the sleeve 9; at least two second connecting means 11 are connected between the inner sleeve 4 and the outer sleeve 3.
When the length overlength of outer tube 3 or length are too short, lead to the unable length adjustment that satisfies the length adjustment requirement of interior sleeve pipe 4 relatively of outer tube 3, need change the outer tube, still be connected with connecting pipe 27 between sleeve and outer tube, connecting pipe 27 one end is connected fixedly with sleeve 9, and the other one end of connecting pipe 27 is equipped with flange joint, and the one end of outer tube 3 is equipped with flange joint, and connecting pipe 27 and outer tube 3 pass through flange joint and connect fixedly.
The outer walls of the first upright post 6 and the inner sleeve 4 are respectively provided with scale marks, the position of the sleeve 9 relative to the first upright post 6 is adjusted through the scale marks on the first upright post 6, and the length of the inner sleeve 4 inserted into the outer sleeve 3 is adjusted through the scale marks on the outer wall of the inner sleeve 4.
A limiting piece 13 for limiting the length of the inner sleeve 4 inserted into the outer sleeve 3 is further arranged on the side wall of the outer sleeve 3, and the limiting piece 13 is a bolt in this embodiment; the side wall of the outer sleeve 3 is provided with an internal thread hole for installing the limiting piece 13, and the limiting piece 13 is inserted into the inner wall of the outer sleeve to abut against the outer wall of the inner sleeve 4 by matching with the internal thread hole.
Specifically, the first connecting device 10 comprises a positioning sleeve 14 and a first locking screw 15, one end of the positioning sleeve 14 is vertically fixed on the first blind flange 5, and the other end of the positioning sleeve 14 is provided with an internal threaded blind hole 24; a left thread section 16 and a right thread section 17 are respectively arranged at two ends of the first locking screw 15, and a pulling means 18 is arranged in the middle of the first locking screw 15; the right thread section 17 is inserted into the inner thread blind hole in a matching way; one side of the sleeve 9 close to the first blind flange 5 is provided with a flange end; the left thread section 16 penetrates through the flange end of the sleeve 9, and locking nuts 19 are respectively arranged on two sides of the left thread section 16 penetrating through the flange end; the right thread segment 17 has a length greater than the length of the left thread segment 16.
Specifically, the second connecting device 11 comprises a locking sleeve 20 and a second locking screw 21, one end of the locking sleeve 20 is connected with the outer sleeve 3, and the other end of the locking sleeve 20 is in threaded connection with one end of the second locking screw 21; the other end of the second locking screw 21 is connected to the inner sleeve 4. One end of the locking sleeve 20 connected with the outer sleeve 3 is provided with a stud 22, and one end of the second locking screw 21 connected with the inner sleeve 4 is provided with an external thread; the outer sleeve 3 and the inner sleeve 4 are respectively provided with a flange end, and one end of the stud 22 and one end of the second locking screw 21 respectively penetrate through the flange ends of the outer sleeve and the inner sleeve and are locked through the nut 23.
A method for using a temporary substitute device for a cryogenic pipe expansion joint, as shown in fig. 9, for testing the strength of a cryogenic expansion pipe, the method comprising the steps of:
s1, adjusting the distance between the sleeve 9 and the first blind flange 5 and the length of the inner sleeve 4 inserted into the outer sleeve 2 according to the position of the low-temperature pipeline joint; after the adjustment is finished, the distance between the sleeve 9 and the first blind flange 5 is fixed through a first connecting device 10, and the length of the inner sleeve 4 inserted into the outer sleeve 3 is fixed through a second connecting device 11;
s2, respectively connecting the vertical connecting seat 1 and the horizontal connecting seat 2 to flange joints of two sections of low-temperature expansion pipes;
s3, connecting a hose 25 between the pipe connectors 12 on the first blind flange 5 and the second blind flange 7, wherein the hose 25 is communicated with two sections of low-temperature expansion pipes;
s4, filling nitrogen into the low-temperature expansion pipe for strength test; and (5) removing the temporary replacing device of the expansion joint of the cryogenic pipe after the strength test is finished.
The invention also provides a use method of the temporary replacing device for the expansion joint of the cryogenic pipe, which is used for positioning the cryogenic expansion pipe, as shown in figure 9, and comprises the following steps:
and 4, adjusting the positions of the two low-temperature expansion pipes 26 according to the adjusted temporary replacing device for the expansion joints of the low-temperature pipes, and respectively connecting the flange joints of the two low-temperature expansion pipes 26 to the first blind flange 5 and the second blind flange 7 to realize the positioning of the two low-temperature expansion pipes.
The present invention is further explained and not limited by the embodiments, and those skilled in the art can make various modifications as necessary after reading the present specification, but all the embodiments are protected by the patent law within the scope of the claims.
Claims (10)
1. A temporary replacing device for a low-temperature pipe expansion joint is characterized by comprising a vertical connecting seat, a horizontal connecting seat, an outer sleeve and an inner sleeve, wherein the outer sleeve and the inner sleeve are connected between the vertical connecting seat and the horizontal connecting seat; one end of the inner sleeve is movably inserted into the outer sleeve in a clearance way; the vertical connecting base comprises a first blind flange and a first upright post, and the first upright post is vertically fixed in the center of the first blind flange; the transverse connecting seat comprises a second blind flange and a second upright post vertically fixed in the center of the second blind flange; one end of the inner sleeve is fixedly connected with the second upright post; one end of the outer sleeve is connected with a sleeve, and the sleeve is sleeved outside the first upright post; a first connecting device used for limiting the distance between the sleeve and the first blind flange is arranged between the sleeve and the first blind flange; a second connecting device used for limiting the length of the inner sleeve inserted into the outer sleeve is connected between the inner sleeve and the outer sleeve; and the first blind flange and the second blind flange are respectively provided with a pipe connector for strength test.
2. The device as claimed in claim 1, wherein the outer sleeve has a stop member on its side wall for limiting the length of the inner sleeve inserted into the outer sleeve; the side wall of the outer sleeve is provided with an internal thread hole for installing the limiting piece, and the limiting piece is inserted into the inner wall of the outer sleeve to abut against the outer wall of the inner sleeve in cooperation with the internal thread hole.
3. A temporary replacement for a cryogenic pipe expansion joint as claimed in claim 2, wherein at least two first connection means are provided between the first blind flange and the sleeve; at least two second connecting devices are connected between the inner sleeve and the outer sleeve.
4. The temporary replacing device for the expansion joint of the cryogenic pipe as claimed in claim 3, wherein the first connecting device comprises a positioning sleeve and a first locking screw, one end of the positioning sleeve is vertically fixed on the first blind flange, and the other end of the positioning sleeve is provided with an internally threaded blind hole; the two ends of the first locking screw are respectively provided with a left thread section and a right thread section, and the middle part of the first locking screw is provided with a pulling means; the right thread section is inserted into the internal thread blind hole in a matching manner; one side of the sleeve, which is close to the first blind flange, is provided with a flange end; the left thread section penetrates through the flange end of the sleeve, and locking nuts are respectively installed on two sides of the left thread section, which penetrates through the flange end.
5. The temporary replacing device for the expansion joint of the cryogenic pipe as claimed in claim 3, wherein the second connecting device comprises a locking sleeve and a second locking screw, one end of the locking sleeve is connected with the outer sleeve, and the other end of the locking sleeve is in threaded connection with one end of the second locking screw; the other end of the second locking screw is connected with the inner sleeve.
6. The device as claimed in claim 5, wherein the locking sleeve has a stud at one end connected to the outer sleeve, and the second locking screw has an external thread at one end connected to the inner sleeve; the outer sleeve and the inner sleeve are respectively provided with a flange end, and one end of the stud and one end of the second locking screw respectively penetrate through the flange ends of the outer sleeve and the inner sleeve and are locked through nuts.
7. The apparatus as claimed in claim 1, wherein the first column and the inner sleeve have graduation marks on their outer walls.
8. The temporary replacement device for the expansion joint of a cryogenic pipe as claimed in claim 1, wherein a connecting pipe is further connected between the sleeve and the outer sleeve, one end of the connecting pipe is fixedly connected to the sleeve, the other end of the connecting pipe is provided with a flange joint, one end of the outer sleeve is provided with a flange joint, and the connecting pipe and the outer sleeve are fixedly connected through the flange joint.
9. A method of using a device for temporarily replacing an expansion joint of a cryogenic pipe, the device being as claimed in claim 2, the method being used for testing the strength of the cryogenic pipe, the method comprising the steps of:
s1, adjusting the distance between the sleeve and the first blind flange and the length of the inner sleeve inserted into the outer sleeve according to the position of the low-temperature pipeline joint; after the adjustment is finished, the distance between the sleeve and the first blind flange is fixed through the first connecting device, and the length of the inner sleeve inserted into the outer sleeve is fixed through the second connecting device;
s2, connecting the vertical connecting seat and the horizontal connecting seat to flange joints of two sections of low-temperature expansion pipes respectively;
s3, connecting a hose between pipe joints on the first blind flange and the second blind flange, wherein the hose is communicated with two sections of low-temperature expansion hoses;
s4, filling nitrogen into the low-temperature expansion hose to perform a strength test; and (5) removing the temporary replacing device of the expansion joint of the cryogenic pipe after the strength test is finished.
10. A method of using a cryogenic pipe expansion joint temporary replacement device, the cryogenic pipe expansion joint temporary replacement device as recited in claim 7, the method for locating a cryogenic expansion pipe, the method comprising the steps of:
step 1, preliminarily assembling a vertical connecting seat, a horizontal connecting seat, an outer sleeve, an inner sleeve, a first connecting device and a second connecting device;
step 2, adjusting the distance between the sleeve and the first blind flange and the length of the inner sleeve inserted into the outer sleeve according to the size of the expansion joint, and reading scale marks during adjustment to adjust to the required length;
step 3, fixing the primary adjustment through the first connecting device and the second connecting device;
and 4, adjusting the positions of the two cryogenic pipes according to the adjusted temporary replacing device for the cryogenic pipe expansion joints, and connecting the pipe joints of the two cryogenic pipes to the first blind flange and the second blind flange to realize the positioning of the two cryogenic expansion pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517729.2A CN114441287A (en) | 2021-12-13 | 2021-12-13 | Temporary replacing device for expansion joint of low-temperature pipe and using method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111517729.2A CN114441287A (en) | 2021-12-13 | 2021-12-13 | Temporary replacing device for expansion joint of low-temperature pipe and using method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114441287A true CN114441287A (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111517729.2A Pending CN114441287A (en) | 2021-12-13 | 2021-12-13 | Temporary replacing device for expansion joint of low-temperature pipe and using method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114441287A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204533953U (en) * | 2015-02-16 | 2015-08-05 | 中国海洋石油总公司 | The interim replacement device of pipeline right-angle type valve |
| CN105605307A (en) * | 2016-02-23 | 2016-05-25 | 中国海洋石油总公司 | Variable span flange interface type dummy valve connector |
| CN106641529A (en) * | 2017-02-08 | 2017-05-10 | 南京尚爱机械制造有限公司 | Length-adjustable rubber hose connecting unit |
| CN206310076U (en) * | 2016-12-16 | 2017-07-07 | 中国海洋石油总公司 | Adjustable type flange coupling connector |
| CN207500695U (en) * | 2017-08-07 | 2018-06-15 | 嘉兴通达机械有限公司 | A kind of hydraulic pressure angle coupling |
| CN209484113U (en) * | 2018-11-28 | 2019-10-11 | 中国石油天然气股份有限公司 | Assembling pipe joint and compensator |
| CN212203559U (en) * | 2020-05-29 | 2020-12-22 | 天津津通阀门制造有限责任公司 | Expansion joint |
| CN212616918U (en) * | 2020-06-23 | 2021-02-26 | 浙江佳力科技股份有限公司 | Expansion joint for connecting pump test pipeline |
| CN212839928U (en) * | 2020-05-07 | 2021-03-30 | 崔洁 | Connection structure of high temperature heat pump and pipeline |
-
2021
- 2021-12-13 CN CN202111517729.2A patent/CN114441287A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204533953U (en) * | 2015-02-16 | 2015-08-05 | 中国海洋石油总公司 | The interim replacement device of pipeline right-angle type valve |
| CN105605307A (en) * | 2016-02-23 | 2016-05-25 | 中国海洋石油总公司 | Variable span flange interface type dummy valve connector |
| CN206310076U (en) * | 2016-12-16 | 2017-07-07 | 中国海洋石油总公司 | Adjustable type flange coupling connector |
| CN106641529A (en) * | 2017-02-08 | 2017-05-10 | 南京尚爱机械制造有限公司 | Length-adjustable rubber hose connecting unit |
| CN207500695U (en) * | 2017-08-07 | 2018-06-15 | 嘉兴通达机械有限公司 | A kind of hydraulic pressure angle coupling |
| CN209484113U (en) * | 2018-11-28 | 2019-10-11 | 中国石油天然气股份有限公司 | Assembling pipe joint and compensator |
| CN212839928U (en) * | 2020-05-07 | 2021-03-30 | 崔洁 | Connection structure of high temperature heat pump and pipeline |
| CN212203559U (en) * | 2020-05-29 | 2020-12-22 | 天津津通阀门制造有限责任公司 | Expansion joint |
| CN212616918U (en) * | 2020-06-23 | 2021-02-26 | 浙江佳力科技股份有限公司 | Expansion joint for connecting pump test pipeline |
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