CN111420948B - Metal expansion joint belt cleaning device - Google Patents
Metal expansion joint belt cleaning device Download PDFInfo
- Publication number
- CN111420948B CN111420948B CN202010336111.5A CN202010336111A CN111420948B CN 111420948 B CN111420948 B CN 111420948B CN 202010336111 A CN202010336111 A CN 202010336111A CN 111420948 B CN111420948 B CN 111420948B
- Authority
- CN
- China
- Prior art keywords
- expansion joint
- bearing
- cleaning
- cylinder body
- flange
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/032—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing
- B08B9/0321—Cleaning the internal surfaces; Removal of blockages by the mechanical action of a moving fluid, e.g. by flushing using pressurised, pulsating or purging fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L51/00—Expansion-compensation arrangements for pipe-lines
- F16L51/02—Expansion-compensation arrangements for pipe-lines making use of bellows or an expansible folded or corrugated tube
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cleaning In General (AREA)
Abstract
The invention provides a metal expansion joint cleaning device which comprises a cylinder body arranged in an expansion joint, wherein one end of the cylinder body is closed, the other end of the cylinder body is communicated with a high-pressure cleaning medium communicating pipe, a plurality of injection holes which are arranged in rows are arranged along the axial direction of the cylinder body, and the number of the injection holes is not less than the number of wave troughs of the expansion joint. The cleaning device is suitable for cleaning the metal expansion joint with the continuous corrugated structure, and is particularly suitable for cleaning the metal expansion joint with continuous U-shaped corrugations, omega-shaped corrugations and M-shaped corrugations; the cleaning device is not only suitable for cleaning the metal expansion joint in the extension state, but also suitable for cleaning the metal expansion joint in the compression state; the cleaning device has good cleaning effect and can be used for cleaning scale, dust and other adhesive dirt at the trough of the inner wall of the expansion joint; the cleaning device has high cleaning efficiency, only needs 1-2 minutes for the cleaning stage, and has good stability and flexibility in the cleaning process.
Description
Technical Field
The invention relates to a metal expansion joint cleaning device.
Background
Expansion joints are commonly used in pipe networks in the fields of petroleum, chemical engineering, sewage, pharmacy and the like, and are used for eliminating stress generated by expansion caused by heat and contraction caused by cold of pipelines and ensuring safe use of the pipe networks. Whether a gas pipe network or a liquid pipe network is adopted, the medium in the pipe contains one or more chemical substances, the medium can cause scaling or dust deposition at the inner corrugation position of the expansion joint on one hand, corrosion can be caused on the other hand, and in addition, factors such as long-term use, aging, deformation and the like can easily cause damage to the expansion joint, if the medium is not timely disposed, production is influenced, safety can be threatened, and even accidents such as poisoning, fire catching, explosion and the like can be caused. For this purpose, the conventional disposal method is to replace the expansion joint with a new one, but this method requires a high spare part cost.
Although document CN203517149U discloses an expansion joint with a flushing structure, which includes a connection pipe, a corrugated pipe welded together with the connection pipe, two ring plates welded on two sides of the corrugated pipe, a screw hole opened on the upper portion of the ring plate, a screw bolt threaded through the screw hole and a nut, the expansion joint further includes a flushing pipe, one end of the flushing pipe is connected to a plug of the connection pipe, and the other end of the flushing pipe is opposite to the wave trough of the corrugated pipe. However, the structure is only suitable for expansion joints with wide adjacent wave trough spacing and single corrugation, and the wave crest of the corrugated pipe on the expansion joint is clamped between the two ring plates, so that the expansion joint cannot stretch out and draw back, and the value of the expansion joint is lost.
Disclosure of Invention
The invention aims to provide a cleaning device suitable for cleaning a metal expansion joint with a continuous corrugated structure.
In order to achieve the above object, the present invention adopts the following technical solutions.
The utility model provides a metal expansion joint belt cleaning device, is including setting up in the inside barrel of expansion joint, and barrel one end is sealed, other end intercommunication high pressure cleaning medium communicating pipe, is provided with a plurality of jet orifices that the row was arranged along the barrel axial, and the trough quantity of expansion joint is no less than to the quantity of jet orifice. In the invention, the high pressure refers to that the pressure of the cleaning medium is not lower than 1Mpa and not higher than the rated pressure which can be borne by the metal expansion joint, and can be specifically selected according to the test pressure of the pipeline in which the metal expansion joint is positioned.
In order to improve the cleaning effect of the metal expansion joint, the distance between adjacent spray holes is 3/1-1/2 of the distance between adjacent wave troughs on the inner wall of the expansion joint.
Preferably, the cylinder body adopts a non-hollow structure, and the injection hole is communicated with the high-pressure cleaning medium communicating pipe through a medium channel arranged in the cylinder body.
Preferably, the hole diameter of the injection hole is 0.5 to 1.5 mm.
In order to further improve the cleaning effect of the metal expansion joint, 2-3 rows of injection holes are arranged along the axial direction of the cylinder body, and the cylinder body and the expansion joint can relatively rotate around the axis of the expansion joint.
In order to improve the cleaning efficiency of the expansion joint and enable the cleaning process to be more flexible, as one of the preferable schemes of the invention, a first bearing is arranged at one end part of a cylinder body, the inner wall of the first bearing is matched and connected with the cylinder body, the outer wall of the first bearing is matched and connected with a first flange, and the first flange is matched and connected with a flange A of the expansion joint; a first gear is arranged at the end part of the cylinder body close to the first bearing, the first gear is fixedly connected with the cylinder body and is matched with a second gear, and the second gear is connected with an output shaft of the motor; a second bearing is arranged at the central part of the first gear, the inner wall of the second bearing is connected with a cleaning medium communicating pipe in a matching way, and the outer wall of the second bearing is connected with the first gear in a matching way; the gear I and the cylinder body are driven to rotate by the rotation of the motor driving gear II, and the gear I rotates around the cleaning medium communicating pipe.
In order to improve the stability of the expansion joint in the cleaning process, a third bearing is arranged at the end part of the cylinder body far away from the first bearing, the inner wall of the third bearing is matched and connected with the cylinder body, the outer wall of the third bearing is matched and connected with a second flange, and the second flange is matched and connected with a flange B of the expansion joint.
In order to improve the cleaning efficiency of the expansion joint and enable the cleaning process to be more flexible, as a second preferred scheme of the invention, a bearing IV is respectively arranged at two end parts of the cylinder body, the inner wall of the bearing IV is matched and connected with the cylinder body, and the outer wall of the bearing IV is respectively matched and connected with a flange A and a flange B of the expansion joint; a baffle plate used for limiting the expansion joint to move outwards in the axial direction is arranged on the outer side of the bearing IV; the relative rotation of the cylinder and the expansion joint is realized by rotating the flange A or the flange B.
Furthermore, a drain hole is formed in the bottom of the barrel, a plug is arranged at the outlet of the drain hole in a matched mode, and during cleaning, the plug 24 is firstly detached and then cleaned, so that accumulated liquid is prevented.
Further, the length of the bearing IV is not less than the sum of the elongation and the compression of the expansion joint; during cleaning, the expansion joint is adjusted to be in an extension state, a compression state or a free state through a split screw assembly connected to the flange A and the flange B.
Has the advantages that: the cleaning device is suitable for cleaning the metal expansion joint with the continuous corrugated structure, and is particularly suitable for cleaning the metal expansion joint with continuous U-shaped corrugations, omega-shaped corrugations and M-shaped corrugations; the cleaning device is not only suitable for cleaning the metal expansion joint in the extension state, but also suitable for cleaning the metal expansion joint in the compression state; the cleaning device has good cleaning effect and can be used for cleaning scale, dust and other adhesive dirt at the trough of the inner wall of the expansion joint; the cleaning device has high cleaning efficiency, only needs 1-2 minutes for the cleaning stage, and has good stability and flexibility in the cleaning process.
Drawings
FIG. 1 is a schematic illustration of an embodiment metal expansion joint;
FIG. 2 is a schematic view of a cleaning apparatus for a metal expansion joint in example 1;
FIG. 3 is a schematic view of a cleaning apparatus for a metal expansion joint in example 2;
FIG. 4 is a schematic view of a cleaning apparatus for a metal expansion joint in example 3 (without drain holes and plugs);
FIG. 5 is a schematic view of a metal expansion joint cleaning apparatus (provided with drain holes and plugs) in example 3.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and specific embodiments, but the following embodiments are only used for understanding the principle of the present invention and the core idea thereof, and do not limit the scope of the present invention. It should be noted that modifications to the invention as described herein, which do not depart from the principles of the invention, are intended to be within the scope of the claims which follow.
Example 1
A metal expansion joint cleaning device is shown in figures 1 and 2 and comprises a cylinder body 9 arranged inside an expansion joint, one end of the cylinder body 9 is closed, the other end of the cylinder body is communicated with a high-pressure cleaning medium communicating pipe 6, a plurality of injection holes 11 which are arranged in rows are arranged along the axial direction of the cylinder body 9, and the number of the injection holes 11 is not less than the number of wave troughs 10 of the expansion joint. The expansion joint corrugations in this embodiment are omega-shaped corrugations.
In this embodiment, the distance between adjacent injection holes 11 is 1/3-1/2 of the distance between adjacent troughs 10 on the inner wall of the expansion joint.
In this embodiment, the cylinder 9 has a non-hollow structure, and the injection hole 11 is communicated with the high-pressure cleaning medium communication pipe 6 through a medium passage 13 provided in the cylinder 9.
In this embodiment, the hole diameter of the injection hole 11 is 0.5 mm.
In this embodiment, 3 rows of the injection holes 11 are provided along the axial direction of the cylinder 9, and the cylinder 9 and the expansion joint are relatively rotatable around the expansion joint axis.
As shown in fig. 2, a first bearing 4 is arranged at one end of the cylinder 9, the inner wall of the first bearing 4 is connected with the cylinder 9 in a matching manner, the outer wall of the first bearing is connected with a first flange 3 in a matching manner, and the first flange 3 is connected with an expansion joint flange a7 in a matching manner; a first gear 8 is arranged at the end part of the cylinder 9 close to the first bearing 4, the first gear 8 is fixedly connected with the cylinder 9 and is matched with a second gear 2, and the second gear 2 is connected with an output shaft of the motor 1; a second bearing 5 is arranged at the central part of the first gear 8, the inner wall of the second bearing 5 is connected with a cleaning medium communicating pipe 6 in a matching way, and the outer wall of the second bearing 5 is connected with the first gear 8 in a matching way; the gear 2 is driven by the motor 1 to rotate so as to drive the gear I8 and the cylinder 9 to rotate, and meanwhile, the gear I8 rotates around the cleaning medium communicating pipe 6. And a third bearing 15 is arranged at the end part of the cylinder 9 far away from the first bearing 4, the inner wall of the third bearing 15 is matched and connected with the cylinder 9, the outer wall of the third bearing is matched and connected with a second flange 16, and the second flange 16 is matched and connected with a flange B14 of the expansion joint.
Example 2
A metal expansion joint cleaning device is shown in figures 1 and 3 and comprises a cylinder body 9 arranged inside an expansion joint, one end of the cylinder body 9 is closed, the other end of the cylinder body is communicated with a high-pressure cleaning medium communicating pipe 6, a plurality of injection holes 11 which are arranged in rows are arranged along the axial direction of the cylinder body 9, and the number of the injection holes 11 is not less than the number of wave troughs 10 of the expansion joint. The expansion joint corrugations in this embodiment are U-shaped corrugations.
In this embodiment, the distance between adjacent injection holes 11 is equal to the distance between adjacent troughs 10 on the inner wall of the expansion joint.
In this embodiment, the hole diameter of the injection hole 11 is 1.5 mm.
In this embodiment, 2 rows of the injection holes 11 are arranged along the axial direction of the cylinder 9, and the cylinder 9 and the expansion joint can rotate relatively around the axis of the expansion joint.
As shown in fig. 3, a first bearing 4 is disposed at one end of the cylinder 9, the inner wall of the first bearing 4 is connected with the cylinder 9 in a matching manner, the outer wall of the first bearing is connected with a first flange 3 in a matching manner, and the first flange 3 is connected with an expansion joint flange a7 in a matching manner; a first gear 8 is arranged at the end part of the cylinder 9 close to the first bearing 4, the first gear 8 is fixedly connected with the cylinder 9 and is matched with a second gear 2, and the second gear 2 is connected with an output shaft of the motor 1; a second bearing 5 is arranged at the central part of the first gear 8, the inner wall of the second bearing 5 is connected with a cleaning medium communicating pipe 6 in a matching way, and the outer wall of the second bearing 5 is connected with the first gear 8 in a matching way; the gear 2 is driven by the motor 1 to rotate so as to drive the gear I8 and the cylinder 9 to rotate, and meanwhile, the gear I8 rotates around the cleaning medium communicating pipe 6.
Example 3
A metal expansion joint cleaning device is shown in figures 1 and 4 and comprises a cylinder body 9 arranged inside an expansion joint, one end of the cylinder body 9 is closed, the other end of the cylinder body is communicated with a high-pressure cleaning medium communicating pipe 6, a plurality of injection holes 11 which are arranged in rows are arranged along the axial direction of the cylinder body 9, and the number of the injection holes 11 is not less than the number of wave troughs 10 of the expansion joint. The expansion joint corrugations in this embodiment are U-shaped corrugations.
In this embodiment, the distance between adjacent injection holes 11 is equal to the distance between adjacent troughs 10 on the inner wall of the expansion joint.
In this embodiment, the hole diameter of the injection hole 11 is 1 mm.
In this embodiment, 3 rows of the injection holes 11 are provided along the axial direction of the cylinder 9, and the cylinder 9 and the expansion joint are relatively rotatable around the expansion joint axis.
Specifically, as shown in fig. 4 and 5, two ends of the cylinder 9 are respectively provided with a bearing four 21, the inner wall of the bearing four 21 is connected with the cylinder 9 in a matching manner, and the outer wall of the bearing four 21 is respectively connected with a flange a7 and a flange B14 of the expansion joint in a matching manner; a baffle 22 for limiting the axial outward movement of the expansion joint is arranged on the outer side of the bearing IV 21, and the baffle 22 is fixed on the cylinder 9 through bolts; the relative rotation of the cylinder 9 and the expansion joint is achieved by rotating the flange a7 or the flange B14. A drain hole 23 is arranged at the bottom (left side in fig. 5) of the barrel 9, a plug 24 is arranged at the outlet of the drain hole 23 in a matching way, and when cleaning, the plug 24 is firstly detached and then cleaned, so as to prevent liquid accumulation. In the cleaning process, the expansion joint of the cleaning device and the cylinder 9 rotate relatively.
In the embodiment, the length of the bearing four 21 is not less than the sum of the elongation and the compression of the expansion joint; during cleaning, the expansion joint is adjusted to an extended state, a compressed state, or a free state by the split screw assembly 18 attached to flange a7 and flange B14.
In the cleaning process, the cleaning devices in the embodiment 1 and the embodiment 2 drive the cylinder to rotate relative to the expansion joint through the motor; for the cleaning device in embodiment 3, the expansion joint can be driven to rotate relative to the cylinder body by external force. High-pressure cleaning liquid enters the injection hole 11 in the cylinder 9 from the high-pressure cleaning medium communicating pipe 6 and is injected to the inner wall of the expansion joint under the action of pressure, and when the scheme in the embodiment 1 is adopted and the expansion joint is in a free state, an extension state or a compression state, the high-pressure cleaning liquid can be injected to the wave troughs and the wave crests of the inner wall of the expansion joint, so that an excellent cleaning effect is realized; when the schemes in the embodiment 2 and the embodiment 3 are adopted and the expansion joint is in a free state or an extension state, the high-pressure cleaning liquid is mainly sprayed to the wave troughs of the inner wall of the expansion joint. After the cleaning device is installed, chemical cleaning liquid or water is adopted to clean the metal expansion joint for only 1-2 minutes, and the cylinder body and the expansion joint can be cleaned after being rotated for 1-2 minutes. If only the dust needs to be cleaned, the dust can be cleaned by using compressed air.
The cleaning device is suitable for cleaning the metal expansion joint with the continuous corrugated structure, and is particularly suitable for cleaning the metal expansion joint with continuous U-shaped corrugations, omega-shaped corrugations and M-shaped corrugations; the cleaning device is not only suitable for cleaning the metal expansion joint in the extension state, but also suitable for cleaning the metal expansion joint in the compression state; the cleaning device has good cleaning effect and can be used for cleaning scale, dust and other adhesive dirt at the trough of the inner wall of the expansion joint; the cleaning device has high cleaning efficiency, only needs 1-2 minutes for the cleaning stage, and has good stability and flexibility in the cleaning process.
Claims (5)
1. The utility model provides a metal expansion joint belt cleaning device which characterized in that: the cleaning device comprises a cylinder body (9) arranged in the expansion joint, one end of the cylinder body (9) is closed, the other end of the cylinder body (9) is communicated with a high-pressure cleaning medium communicating pipe (6), a plurality of injection holes (11) which are arranged in rows are axially arranged along the cylinder body (9), the number of the injection holes (11) is not less than the number of wave troughs (10) of the expansion joint, and the distance between every two adjacent injection holes (11) is 3/1-1/2 of the distance between every two adjacent wave troughs (10) on the inner wall of the expansion joint; a first bearing (4) is arranged at one end of the cylinder body (9), the inner wall of the first bearing (4) is connected with the cylinder body (9) in a matching way, the outer wall of the first bearing (4) is connected with a first flange (3) in a matching way, and the first flange (3) is connected with an expansion joint flange A (7) in a matching way; a first gear (8) is arranged at the end part of the cylinder (9) close to the first bearing (4), the first gear (8) is fixedly connected with the cylinder (9) and is matched with a second gear (2), and the second gear (2) is connected with an output shaft of the motor (1); a second bearing (5) is arranged at the central part of the first gear (8), the inner wall of the second bearing (5) is connected with a cleaning medium communicating pipe (6) in a matching way, and the outer wall of the second bearing (5) is connected with the first gear (8) in a matching way; the gear II (2) is driven by the motor (1) to rotate so as to drive the gear I (8) and the cylinder body (9) to rotate, and meanwhile, the gear I (8) rotates around the cleaning medium communicating pipe (6); a third bearing (15) is arranged at the end part of the cylinder body (9) far away from the first bearing (4), the inner wall of the third bearing (15) is connected with the cylinder body (9) in a matching way, the outer wall of the third bearing (15) is connected with a second flange (16) in a matching way, and the second flange (16) is connected with a flange B (14) of the expansion joint in a matching way; a bearing four (21) is respectively arranged at two end parts of the cylinder body (9), the inner wall of the bearing four (21) is matched and connected with the cylinder body (9), and the outer wall of the bearing four (21) is respectively matched and connected with a flange A (7) and a flange B (14) of the expansion joint; a baffle plate (22) used for limiting the axial outward movement of the expansion joint is arranged on the outer side of the bearing IV (21); the cylinder (9) and the expansion joint can relatively rotate around the axis of the expansion joint, and the relative rotation of the cylinder (9) and the expansion joint is realized by rotating the flange A (7) or the flange B (14); the length of the bearing IV (21) is not less than the sum of the elongation and the compression of the expansion joint; during cleaning, the expansion joint is adjusted to be in an extended state, a compressed state or a free state by a split screw assembly (18) connected to the flange A (7) and the flange B (14).
2. The metal expansion joint cleaning device according to claim 1, wherein: the cylinder (9) adopts a non-hollow structure, and the jet hole (11) is communicated with the high-pressure cleaning medium communicating pipe (6) through a medium channel (13) arranged in the cylinder (9).
3. The metal expansion joint cleaning device according to claim 2, wherein: the aperture of the injection hole (11) is 0.5-1.5 mm.
4. The metal expansion joint cleaning device according to claim 1, 2 or 3, wherein: 2-3 rows of jet holes (11) are arranged along the axial direction of the cylinder body (9).
5. The metal expansion joint cleaning device according to claim 4, wherein: a liquid discharge hole (23) is arranged at the bottom of the cylinder body (9), and a plug (24) is arranged at the outlet of the liquid discharge hole (23) in a matching way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010336111.5A CN111420948B (en) | 2020-04-25 | 2020-04-25 | Metal expansion joint belt cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010336111.5A CN111420948B (en) | 2020-04-25 | 2020-04-25 | Metal expansion joint belt cleaning device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111420948A CN111420948A (en) | 2020-07-17 |
| CN111420948B true CN111420948B (en) | 2022-03-11 |
Family
ID=71556788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010336111.5A Active CN111420948B (en) | 2020-04-25 | 2020-04-25 | Metal expansion joint belt cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111420948B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09281271A (en) * | 1996-04-16 | 1997-10-31 | Ishikawajima Harima Heavy Ind Co Ltd | Bellows cleaning device |
| WO2010074134A1 (en) * | 2008-12-26 | 2010-07-01 | セントラル硝子株式会社 | Cleaning agent for silicon wafer |
| CN204756279U (en) * | 2015-07-23 | 2015-11-11 | 卢江 | Expansion joint |
| CN109647815A (en) * | 2018-12-25 | 2019-04-19 | 内蒙古晶环电子材料有限公司 | A kind of Full-automatic bellows cleaning plant |
| CN209458558U (en) * | 2018-12-06 | 2019-10-01 | 江苏扬光机械制造有限公司 | A kind of slag feed pipe type metal expansion joint |
| CN210266370U (en) * | 2019-06-19 | 2020-04-07 | 南京云天波管补偿器有限公司 | Expansion joint with flushing structure |
-
2020
- 2020-04-25 CN CN202010336111.5A patent/CN111420948B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09281271A (en) * | 1996-04-16 | 1997-10-31 | Ishikawajima Harima Heavy Ind Co Ltd | Bellows cleaning device |
| WO2010074134A1 (en) * | 2008-12-26 | 2010-07-01 | セントラル硝子株式会社 | Cleaning agent for silicon wafer |
| CN204756279U (en) * | 2015-07-23 | 2015-11-11 | 卢江 | Expansion joint |
| CN209458558U (en) * | 2018-12-06 | 2019-10-01 | 江苏扬光机械制造有限公司 | A kind of slag feed pipe type metal expansion joint |
| CN109647815A (en) * | 2018-12-25 | 2019-04-19 | 内蒙古晶环电子材料有限公司 | A kind of Full-automatic bellows cleaning plant |
| CN210266370U (en) * | 2019-06-19 | 2020-04-07 | 南京云天波管补偿器有限公司 | Expansion joint with flushing structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111420948A (en) | 2020-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211423633U (en) | Flange protection device | |
| CN111501053B (en) | Cleaning method of corrugated pipe | |
| CN111420948B (en) | Metal expansion joint belt cleaning device | |
| CN109668005A (en) | A kind of good antiscale property efficient liquid delivery pipe | |
| CN111594399A (en) | Cleaning device for wind driven generator | |
| CN215635597U (en) | Novel pipeline is with anticorrosive sealed pad | |
| CN214947189U (en) | Pipe connecting device with anti-falling function | |
| CN213529828U (en) | Egg type washing spray head | |
| CN204267730U (en) | Gas pipe line on-line rinsing seal arrangement | |
| CN112629311B (en) | Heat exchange tube plugging device, plugging tool, plugging system and plugging method | |
| CN112253878A (en) | Novel semicircle formula low temperature expansion joint | |
| CN201193742Y (en) | Solderless flange-connected stainless steel metal hose of word 'omega' shap | |
| RU181266U1 (en) | HEAT EXCHANGER "PIPE IN PIPE" | |
| CN214946702U (en) | Small-bore gate valve | |
| CN217234832U (en) | Enhanced anti-corrosion metal compensator | |
| CN212309902U (en) | Novel rotary cleaning spray head | |
| CN110925502B (en) | Metal hose with good installation tightness | |
| CN218626033U (en) | Hot water engineering pipeline anticorrosion heat preservation device | |
| CN214500413U (en) | Bidirectional anti-drop sealed pipe connecting structure | |
| CN220487509U (en) | Easy-to-connect water injection anticorrosion central tube for petroleum machinery | |
| CN215568558U (en) | PE pipe with inner wall cleaning function | |
| CN216201412U (en) | Pipeline intermediate head with two-way anti structure of buckling | |
| CN220828127U (en) | Water storage type spraying enclosure | |
| CN220366077U (en) | Novel pipeline flange anticorrosion protection cover | |
| CN2384087Y (en) | Expansion joint for metal pipe |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |