CN114542843B - Non-resistance balance type ripple compensator with external pressure type ripple compensation - Google Patents
Non-resistance balance type ripple compensator with external pressure type ripple compensation Download PDFInfo
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- CN114542843B CN114542843B CN202210182356.6A CN202210182356A CN114542843B CN 114542843 B CN114542843 B CN 114542843B CN 202210182356 A CN202210182356 A CN 202210182356A CN 114542843 B CN114542843 B CN 114542843B
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- main body
- welded
- type ripple
- compensator
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- 230000000149 penetrating effect Effects 0.000 claims abstract description 7
- 230000008602 contraction Effects 0.000 claims description 4
- 244000043261 Hevea brasiliensis Species 0.000 claims description 3
- 229920003052 natural elastomer Polymers 0.000 claims description 3
- 229920001194 natural rubber Polymers 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 abstract description 5
- 239000002994 raw material Substances 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
-
- 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
- F16L23/00—Flanged joints
- F16L23/02—Flanged joints the flanges being connected by members tensioned axially
- F16L23/024—Flanged joints the flanges being connected by members tensioned axially characterised by how the flanges are joined to, or form an extension of, the pipes
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Supports For Pipes And Cables (AREA)
Abstract
The invention discloses an unobstructed balance type ripple compensator with external pressure type ripple compensation, which comprises a ripple compensator main body and a flange plate which is abutted with the input end of the ripple compensator main body, wherein the end of the flange plate far away from the ripple compensator main body is communicated with an external connecting pipe body, the outer wall of the input end of the ripple compensator main body is welded with a supporting block, and a clamping assembly is arranged in the supporting block in a sliding way; the clamping assembly comprises a supporting rod penetrating through the supporting block, an arc plate is welded at one end, close to the flange, of the supporting rod, a buffer piece is welded on the top surface of the arc plate, the top end of the buffer piece is abutted to the outer wall of the external pipe body, a limiting block is welded at the end, far away from the arc plate, of the supporting rod, a spring is sleeved on the outer wall of the supporting rod, and the spring is located between the limiting block and the supporting block; through the clamping assembly that sets up, effectually avoided current device and pipe connection to receive the temperature to influence and break away from not hard up, be favorable to carrying out the centre gripping to device and pipe connection department and consolidate, improved device life.
Description
Technical Field
The invention relates to the technical field of ripple compensators, in particular to a non-resistance balance type ripple compensator with external pressure type ripple compensation.
Background
The corrugated compensator belongs to a compensation element, and can be used for absorbing dimensional changes of pipelines, ducts, containers and the like caused by expansion caused by heat and contraction caused by cold by the like or compensating axial, transverse and angular displacements of the pipelines, the ducts, the containers and the like by utilizing effective expansion and contraction deformation of a corrugated pipe of a working main body of the corrugated compensator; in pipelines in industries such as petroleum, chemical industry, smelting and the like, except for the requirement of corrosion resistance, a corrugated compensator is also commonly used for solving the problems of compensating and counteracting installation deviation caused by cold and hot expansion of a medium on the pipeline; the flexible connection can also be used for improving the mechanical damage caused by the mechanical vibration between the inlet and outlet of the fan and the pump and the pipeline.
When the existing corrugated compensator is used, the existing corrugated compensator is mostly connected with a flange plate communicated with a pipeline through bolts and nuts, and the bolts and nuts at the joint of the pipeline and the compensator are loosened due to long-term outward transmission of cold and hot temperatures inside the pipeline so as to generate gaps to flow out raw materials inside the pipeline, so that the non-resistance balance type corrugated compensator with external pressure type corrugated compensation is provided.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the non-resistance balance type ripple compensator with the external pressure type ripple compensation, and the clamping assembly effectively avoids the problem that the connection between the traditional device and the pipeline is separated and loosened due to the influence of temperature, is beneficial to clamping and reinforcing the connection part of the device and the pipeline, and prolongs the service life of the device.
In order to solve the technical problems, the invention provides the following technical scheme: the non-resistance balance type ripple compensator with the external pressure type ripple compensation comprises a ripple compensator main body and a flange plate which is in butt joint with the input end of the ripple compensator main body, wherein one end of the flange plate, which is far away from the ripple compensator main body, is communicated with an external connecting pipe body, the outer wall of the input end of the ripple compensator main body is welded with a supporting block, and a clamping assembly is arranged in the supporting block in a sliding way; the clamping assembly comprises a supporting rod penetrating through the supporting block, an arc plate is welded at one end, close to the flange, of the supporting rod, a buffer piece is welded at the top surface of the arc plate, the top end of the buffer piece is abutted to the outer wall of the external tube body, a limiting block is welded at the far end, far from the arc plate, of the supporting rod, a spring is sleeved on the outer wall of the supporting rod, and the spring is located between the limiting block and the supporting block.
Preferably, the buffer comprises poling, buffer spring and sliding tube, the poling bottom welds in the arc top surface, poling inner wall sliding connection has the sliding tube, the parcel of poling inner wall has buffer spring, the sliding tube is located directly over the buffer spring, and sliding tube top butt in external body outer wall.
Preferably, the outer wall of the ripple compensator main body is provided with a wave crest, the inner wall of the ripple compensator main body is provided with a wave trough, a clamping block is adhered to the inner wall of the wave trough, and a guide plate is adhered to one end, far from the wave trough, of the clamping block.
Preferably, the two ends of the guide plate, which are close to the opening of the corrugated compensator main body, are provided with arc surfaces, and the guide plate is made of natural rubber and can deform along with the expansion of the corrugated compensator main body.
Preferably, the supporting block circumferential array is welded on the outer wall of the corrugated compensator main body, a threaded rod is arranged in the supporting block in a threaded mode, and threads of the threaded rod penetrate through nuts of the penetrating ends of the supporting block in a threaded mode.
Preferably, the arc-shaped plate is abutted against the outer wall of the flange plate near one end face of the supporting rod.
Preferably, the extension length of the spring is equal to the length of the supporting rod, and the spring is wrapped on the outer wall of the supporting rod and is positioned between the supporting block and the limiting block.
Preferably, the limiting block is cylindrical, and the diameter of the limiting block is larger than that of the spring.
Compared with the prior art, the invention has the following beneficial effects:
1. the clamping assembly effectively avoids the connection of the traditional device and the pipeline from being separated and loosened due to the influence of temperature, is beneficial to clamping and reinforcing the connection part of the device and the pipeline, and prolongs the service life of the device;
2. through the clamping component that sets up, effectually avoided current device to produce vibrations when using and become flexible its and pipeline junction, be favorable to producing vibrations to the device and cushion, increased device functionality.
3. Through guide plate and fixture block that set up, effectually avoided the inside trough of current device to stop the speed reduction to the raw materials, be favorable to carrying out drainage and reduction and trough friction to the inside raw materials of entering device, improved the inside raw materials flow efficiency of device.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a diagram showing a split structure of the ripple compensator main body and the external connection pipe body in FIG. 1 according to the present invention;
FIG. 3 is a schematic view of the internal structure of the clamping assembly of FIG. 1 according to the present invention;
FIG. 4 is a schematic view of the overall structure of the present invention;
FIG. 5 is a schematic view of the internal structure of the baffle of FIG. 1 according to the present invention;
wherein: 1. a ripple compensator body; 2. an outer connecting pipe body; 3. a peak; 4. a threaded rod; 5. a support block; 6. a clamping assembly; 7. a trough; 8. a deflector; 9. a clamping block; 10. a flange plate; 61. a support rod; 62. an arc-shaped plate; 63. a spring; 64. a limiting block; 65. and a buffer member.
Detailed Description
In order to more clearly illustrate the general inventive concept, a detailed description is given below by way of example with reference to the accompanying drawings.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. In the description of the present specification, the description with reference to the terms "one aspect," "some aspects," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the aspect or example is included in at least one aspect or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily for the same scheme or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more aspects or examples.
Examples:
as shown in fig. 1-5, the non-resistance balance type ripple compensator with external pressure type ripple compensation comprises a ripple compensator main body 1 and a flange plate 10 which is in butt joint with the input end of the ripple compensator main body, wherein one end of the flange plate 10 far away from the ripple compensator main body 1 is communicated with an external connecting pipe body 2, the outer wall of the input end of the ripple compensator main body 1 is welded with a supporting block 5, and a clamping assembly 6 is arranged in the supporting block 5 in a sliding way; the clamping assembly 6 comprises a supporting rod 61 penetrating through the supporting block 5, an arc-shaped plate 62 is welded at one end, close to the flange plate 10, of the supporting rod 61, a buffer piece 65 is welded at the top surface of the arc-shaped plate 62, the top end of the buffer piece 65 is abutted to the outer wall of the outer tube body 2, a limiting block 64 is welded at the end, far away from the arc-shaped plate 62, of the supporting rod 61, a spring 63 is sleeved on the outer wall of the supporting rod 61, and the spring 63 is located between the limiting block 64 and the supporting block 5;
working principle: when the staff is connected with the input end of the corrugated compensator main body 1 through the flange plate 10 communicated with the outer connecting pipe body 2, firstly, the arc plate 62 in the clamping assembly 6 is pulled, the arc plate 62 is moved to drive the supporting rod 61 welded with the arc plate to move along with the arc plate, as shown in fig. 3, the supporting rod 61 is moved to drive the limiting block 64 to move and compress the spring 63 to shrink, at the moment, the flange plate 10 is driven to move the outer connecting pipe body 2 communicated with the flange plate to be attached to the input end of the corrugated compensator main body 1, then the supporting rod 61 is released, at the moment, the spring 63 is rebounded to drive the supporting rod 61 to move to compress and clamp the input end of the corrugated compensator main body 1, and then the staff passes a bolt through the attachment position of the flange plate 10 and the corrugated compensator main body 1 and rotates to screw the nut to be connected, so that the traditional device and the pipeline connection are effectively prevented from being separated and loosened due to temperature influence, clamping and reinforcing of the device and the pipeline connection position are facilitated, and the service life of the device is prolonged.
As shown in fig. 3, the buffer member 65 is composed of a through pipe, a buffer spring and a sliding pipe, the bottom end of the through pipe is welded to the top surface of the arc plate 62, the inner wall of the through pipe is slidably connected with the sliding pipe, the buffer spring is wrapped on the inner wall of the through pipe, the sliding pipe is located right above the buffer spring, and the top end of the sliding pipe is abutted to the outer wall of the outer pipe body 2; when the device produces vibrations, the sliding tube of butt in external pipe body 2 outer wall receives the vibration force and moves extrusion buffer spring down along the poling inner wall and shrink resilience and offset the vibration force, effectually avoided current device to produce vibrations when using and become flexible its and pipeline junction, be favorable to producing vibrations to the device and cushion, increased the device functionality.
As shown in fig. 4 and 5, the outer wall of the corrugated compensator main body 1 is provided with a wave crest 3, the inner wall of the corrugated compensator main body 1 is provided with a wave trough 7, a clamping block 9 is adhered to the inner wall of the wave trough 7, and a guide plate 8 is adhered to the end, far from the wave trough 7, of the clamping block 9; specific: both ends of the guide plate 8, which are close to the opening of the corrugated compensator main body 1, are provided with arc surfaces, and the guide plate 8 is made of natural rubber and can deform along with the expansion and contraction of the corrugated compensator main body 1; when the raw material inside the corrugated compensator main body 1 flows, firstly, the guide plates 8 are contacted with the arc surfaces arranged at two ends of the opening of the corrugated compensator main body 1, the arc surfaces are followed to be drained to the top surface of the guide plates 8 for flowing, the raw material is prevented from being repeatedly blocked by the inner trough 7 of the corrugated compensator main body 1 when flowing, the raw material is effectively prevented from being blocked and decelerated by the inner trough 7 of the traditional device, the raw material entering the device is favorably drained, friction with the trough 7 is reduced, and the flow efficiency of the raw material inside the device is improved.
As shown in fig. 1, the supporting blocks 5 are welded on the outer wall of the corrugated compensator main body 1 in a circumferential array, threaded rods 4 are threaded in the supporting blocks 5, and the threaded rods 4 are threaded through nuts at the penetrating ends of the supporting blocks 5; through the threaded rod 4 that the equal screw thread of inside at supporting shoe 5 was worn to establish to run through the equal screw thread coupling nut of its wearing out end of supporting shoe 5 at the threaded rod 4 screw thread, staff accessible screw the adjusting nut and prescribe a limit to ripple compensator main part 1 extension length in threaded rod 4 position.
As shown in fig. 1 and 3, an end surface of the arc plate 62, which is close to the supporting rod 61, is abutted against the outer wall of the flange 10; by abutting the arc plate 62 against the outer wall of the flange plate 10 near one end face of the support rod 61, the arc plate 62 is favorable for clamping the flange plate 10 between the arc plate 62 and the ripple compensator main body 1 when the spring 63 rebounds to push the arc plate 62 to move.
As shown in fig. 3, the extension length of the spring 63 is equal to the length of the supporting rod 61, and the spring 63 is wrapped on the outer wall of the supporting rod 61 and is located between the supporting block 5 and the limiting block 64; by wrapping the spring 63 around the outer wall of the supporting rod 61, the outer wall of the spring is located between the supporting block 5 and the limiting block 64, and the extension length of the spring is equal to the length of the supporting rod 61, so that the arc plate 62 is pulled to tightly clamp the flange plate 10 when the spring 63 rebounds.
As shown in fig. 3, the limiting block 64 is cylindrical, and the diameter of the limiting block 64 is larger than that of the spring 63; the diameter of the cylindrical limiting block 64 is larger than that of the spring 63, so that the cylindrical limiting block 64 is beneficial to limiting the spring 63, and the spring 63 is prevented from being separated from the space between the supporting block 5 and the limiting block 64.
While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (6)
1. The utility model provides a no resistance balance type ripple compensator with external pressure formula ripple compensation, includes ripple compensator main part (1), with ring flange (10) of its input butt, ring flange (10) are apart from ripple compensator main part (1) one end intercommunication extension pipe body (2), its characterized in that: the outer wall of the input end of the corrugated compensator main body (1) is welded with a supporting block (5), and a clamping assembly (6) is arranged in the supporting block (5) in a sliding manner;
the clamping assembly (6) comprises a supporting rod (61) penetrating through the supporting block (5), an arc plate (62) is welded at one end, close to the flange plate (10), of the supporting rod (61), a buffer piece (65) is welded on the top surface of the arc plate (62), the top end of the buffer piece (65) is abutted to the outer wall of the external pipe body (2), a limiting block (64) is welded at the far end, far from the arc plate (62), of the supporting rod (61), a spring (63) is sleeved on the outer wall of the supporting rod (61), and the spring (63) is located between the limiting block (64) and the supporting block (5);
the corrugated compensator is characterized in that a wave crest (3) is arranged on the outer wall of the corrugated compensator main body (1), a wave trough (7) is arranged on the inner wall of the corrugated compensator main body (1), a clamping block (9) is adhered to the inner wall of the wave trough (7), and a guide plate (8) is adhered to the end, far from the wave trough (7), of the clamping block (9);
the two ends of the guide plate (8) close to the opening of the corrugated compensator main body (1) are provided with arc surfaces, and the guide plate (8) is made of natural rubber and can deform along with the expansion and contraction of the corrugated compensator main body (1).
2. A non-resistance balanced type ripple compensator with external pressure type ripple compensation according to claim 1, wherein: the buffer part (65) is composed of a through pipe, a buffer spring and a sliding pipe, the bottom end of the through pipe is welded on the top surface of the arc-shaped plate (62), the inner wall of the through pipe is slidably connected with the sliding pipe, the buffer spring is wrapped on the inner wall of the through pipe, the sliding pipe is located right above the buffer spring, and the top end of the sliding pipe is abutted to the outer wall of the external pipe body (2).
3. A non-resistance balanced type ripple compensator with external pressure type ripple compensation according to claim 1, wherein: the supporting block (5) is welded on the outer wall of the corrugated compensator main body (1) in a circumferential array mode, a threaded rod (4) is arranged in the supporting block (5) in a threaded mode, and threads of the threaded rod (4) penetrate through nuts of the penetrating ends of the supporting block (5) in a threaded mode.
4. A non-resistance balanced type ripple compensator with external pressure type ripple compensation according to claim 1, wherein: and one end surface of the arc-shaped plate (62) close to the supporting rod (61) is abutted against the outer wall of the flange plate (10).
5. A non-resistance balanced type ripple compensator with external pressure type ripple compensation according to claim 1, wherein: the extension length of the spring (63) is equal to the length of the supporting rod (61), and the spring (63) is wrapped on the outer wall of the supporting rod (61) and is positioned between the supporting block (5) and the limiting block (64).
6. A non-resistance balanced type ripple compensator with external pressure type ripple compensation according to claim 1, wherein: the limiting block (64) is cylindrical, and the diameter of the limiting block (64) is larger than that of the spring (63).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210182356.6A CN114542843B (en) | 2022-02-25 | 2022-02-25 | Non-resistance balance type ripple compensator with external pressure type ripple compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210182356.6A CN114542843B (en) | 2022-02-25 | 2022-02-25 | Non-resistance balance type ripple compensator with external pressure type ripple compensation |
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| Publication Number | Publication Date |
|---|---|
| CN114542843A CN114542843A (en) | 2022-05-27 |
| CN114542843B true CN114542843B (en) | 2023-11-10 |
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| CN202210182356.6A Active CN114542843B (en) | 2022-02-25 | 2022-02-25 | Non-resistance balance type ripple compensator with external pressure type ripple compensation |
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|---|---|---|---|---|
| CN2433498Y (en) * | 2000-08-01 | 2001-06-06 | 上海国电燃机技术工程有限公司 | Anti-sand bellow expansion joint |
| DE102013004015A1 (en) * | 2013-03-08 | 2014-09-11 | Möller Werke GmbH | Length-adjustable tubular element |
| CN209781971U (en) * | 2019-04-15 | 2019-12-13 | 广东首隆管道科技有限公司 | Red copper clamp pressing type connecting pipe fitting |
| CN210266374U (en) * | 2019-07-30 | 2020-04-07 | 河北龙盛管道装备有限公司 | Corrugated compensator |
| CN212004458U (en) * | 2019-12-31 | 2020-11-24 | 上海思探博机电设备有限公司 | Check valve convenient to maintain for air compressor |
| CN212536827U (en) * | 2020-04-28 | 2021-02-12 | 朝阳百盛钛业股份有限公司 | Fastening structure for vacuum pipeline of faucet |
| CN213064877U (en) * | 2020-06-16 | 2021-04-27 | 辽宁省石油化工规划设计院有限公司 | Petrochemical pipeline support |
| CN213117989U (en) * | 2020-08-31 | 2021-05-04 | 内蒙古东蛟电力装备有限公司 | Wear-resisting leak protection formula compensator |
| CN214425350U (en) * | 2021-03-10 | 2021-10-19 | 林镇海 | A pipeline for town sewage treatment |
-
2022
- 2022-02-25 CN CN202210182356.6A patent/CN114542843B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2433498Y (en) * | 2000-08-01 | 2001-06-06 | 上海国电燃机技术工程有限公司 | Anti-sand bellow expansion joint |
| DE102013004015A1 (en) * | 2013-03-08 | 2014-09-11 | Möller Werke GmbH | Length-adjustable tubular element |
| CN209781971U (en) * | 2019-04-15 | 2019-12-13 | 广东首隆管道科技有限公司 | Red copper clamp pressing type connecting pipe fitting |
| CN210266374U (en) * | 2019-07-30 | 2020-04-07 | 河北龙盛管道装备有限公司 | Corrugated compensator |
| CN212004458U (en) * | 2019-12-31 | 2020-11-24 | 上海思探博机电设备有限公司 | Check valve convenient to maintain for air compressor |
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| CN213064877U (en) * | 2020-06-16 | 2021-04-27 | 辽宁省石油化工规划设计院有限公司 | Petrochemical pipeline support |
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| CN214425350U (en) * | 2021-03-10 | 2021-10-19 | 林镇海 | A pipeline for town sewage treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114542843A (en) | 2022-05-27 |
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