CN214789481U - Pipeline sampling composite tool and external member - Google Patents

Pipeline sampling composite tool and external member Download PDF

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Publication number
CN214789481U
CN214789481U CN202121013230.3U CN202121013230U CN214789481U CN 214789481 U CN214789481 U CN 214789481U CN 202121013230 U CN202121013230 U CN 202121013230U CN 214789481 U CN214789481 U CN 214789481U
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sampling
pipeline
compression
tool
sample
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铁文军
张峥智
冯涛
赵志浩
李秀明
耿昌
杜正刚
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Landspace Technology Co Ltd
Zhejiang Landspace Technology Co Ltd
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Landspace Technology Co Ltd
Zhejiang Landspace Technology Co Ltd
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Abstract

The utility model provides a compound frock of pipeline sample, include: the compression tool comprises at least 3 pull rods and is used for adjusting the compression amount of a pipeline, a circular ring is arranged on the upper end face of the compression tool and is used for fixing the upper ends of the pull rods, and a circular ring is arranged on the lower end face of the compression tool and is used for fixing the lower ends of the pull rods; and the positioning tool is used for being installed at the connecting position between the pipelines so as to limit the circumferential rotation between the pipelines. The device can carry out the pipeline sample fast and accurately through simple compression frock and location frock, has improved sampling efficiency and has reduced the dependence to the personnel's experience of taking a sample.

Description

Pipeline sampling composite tool and external member
Technical Field
The utility model relates to a sample field, concretely relates to compound frock of pipeline sample and external member.
Background
The pressurized conveying system pipeline in the space carrier is a blood vessel of the space carrier and plays roles in fuel conveying, storage tank pressurization, gas emission and the like. The traditional sampling manufacture of the guide pipe of the spacecraft generally adopts a bent pipe or an elbow to sample on the spacecraft on site, and the bent pipe or the elbow is repaired to adapt to the deviation at two ends of a pipeline.
Traditional major diameter pipeline sample mode sample need repair repeatedly and try on dress, and a pipeline is repaired and is tried on dress and often up to ten times, still has the repair and has crossed the head, and the condemned risk of sample pipeline spare has seriously influenced whole space carrier's final assembly progress. Meanwhile, sampling operation needs certain sampling experience accumulation, the requirements on skills and experiences of operators are high, the indexes of professional sampling personnel of domestic spacecraft pipelines are flexible, and the dependence degree on personnel is high.
In view of this, it is desirable to design a pipeline sampling composite tool and a kit that do not depend on the experience of operators, are simple to operate, and have high accuracy.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the not enough of prior art, provide a compound frock of pipeline sample and external member.
The utility model provides a compound frock of pipeline sample, include: the compression tool comprises at least 3 pull rods and is used for adjusting the compression amount of a pipeline, a circular ring is arranged on the upper end face of the compression tool and is used for fixing the upper ends of the pull rods, and a circular ring is arranged on the lower end face of the compression tool and is used for fixing the lower ends of the pull rods; and the positioning tool is used for being installed at the connecting position between the pipelines so as to limit the circumferential rotation between the pipelines.
According to the utility model discloses an embodiment, the compression frock comprises 4 pull rods and is used for adjusting the pipeline compression volume.
According to the utility model discloses an embodiment, the ring of compression frock comprises two half snap ring butt joints, through the adjustable fixed of nut.
According to the utility model discloses an embodiment, the location frock comprises two semicircle rings, two semicircle rings are used for docking into a whole ring each other through the nut.
According to the utility model discloses an embodiment, two semicircle ring part fretworks, the junction of being convenient for between the pipeline passes through the fretwork carries out spot welding.
According to the utility model discloses an embodiment, pipeline sample composite frock still includes: and the guide core rod is used for being installed inside the connecting position between the pipelines so as to limit the axial sliding of the pipelines.
According to an embodiment of the present invention, the guiding core rod is formed of a cylinder adapted to the size of the inner wall of the pipeline.
According to an embodiment of the present invention, the guiding core rod is a hollow cylinder.
On the other hand, the utility model also provides a pipeline sampling kit, which comprises the pipeline sampling composite tool, a first sampling straight pipe, a second sampling straight pipe and a sampling bent pipe; the sampling elbow is used for being connected first sample straight tube with between the second sample straight tube, the compression frock is installed be used for through adjusting the compression volume on the first sample straight tube, make sampling elbow adaptation is connected first sample straight tube with between the second sample straight tube, the other end of first sample straight tube be used for being connected to the storage tank bottom of the case the other end of second sample straight tube is used for being connected to on the engine.
According to the utility model discloses an embodiment, the location frock includes first location frock and second location frock, and first location frock is used for installing the sample return bend with the junction of first sample straight tube, second location frock is used for installing the sample return bend with the junction of second sample straight tube.
The pipeline sampling composite tool in the application can be used for rapidly and accurately connecting the bottom of the storage box with an engine through a simple compression tool and a positioning tool, and the accuracy of pipeline sampling is improved due to the fact that operation is simple, sampling efficiency is improved, dependence on sampling experience of sampling personnel is reduced, and the pipeline sampling accuracy is improved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of the specification of the invention, illustrate exemplary embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a schematic view of a compression tool in a pipeline sampling composite tool according to an embodiment of the present invention;
fig. 2 is a schematic view of a positioning tool in the pipeline sampling composite tool according to an embodiment of the present invention;
fig. 3 is a schematic view of a pipeline sampling kit according to an embodiment of the present invention;
fig. 4 is a perspective view of a tubing sampling kit according to another embodiment of the present invention;
fig. 5 is a schematic view of the pipeline sampling kit according to an embodiment of the present invention after installation.
Reference numerals:
201-a first straight sampling pipe, 202-a second straight sampling pipe, 203-a bent sampling pipe, 204-a compression tool, 2041-a pull rod, 205-a first positioning tool, 206-a second positioning tool, 207-a first guide mandrel and 208-a second guide mandrel.
Detailed Description
The features and exemplary embodiments of various aspects of the present invention will be described in detail below, and in order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention, for the purposes of illustrating the principles of the invention. Additionally, the components in the drawings are not necessarily to scale. For example, the dimensions of some of the structures or regions in the figures may be exaggerated relative to other structures or regions to help improve understanding of embodiments of the present invention.
The directional terms appearing in the following description are directions shown in the drawings and do not limit the specific structure of the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise stated, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.
Furthermore, the terms "comprises," "comprising," "includes," "including," "has," "having" or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a structure or component comprising a list of elements does not include only those elements but may include other mechanical components not expressly listed or inherent to such structure or component. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional like elements in the article or device comprising the element.
Spatially relative terms such as "below," "… below," "lower," "above," "… above," "upper," and the like are used for convenience in describing the positioning of one element relative to a second element and are intended to encompass different orientations of the device in addition to different orientations than those illustrated in the figures. Further, for example, the phrase "one element is over/under another element" may mean that the two elements are in direct contact, or that there is another element between the two elements. Furthermore, terms such as "first", "second", and the like, are also used to describe various elements, regions, sections, etc. and should not be taken as limiting. Like terms refer to like elements throughout the description.
It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention.
Fig. 1 is a schematic view of a compression tool in a pipeline sampling composite tool according to an embodiment of the present invention; fig. 2 is a schematic view of a positioning tool in the pipeline sampling composite tool according to an embodiment of the present invention; fig. 3 is a schematic view of a pipeline sampling kit according to an embodiment of the present invention; fig. 4 is a perspective view of a tubing sampling kit according to another embodiment of the present invention; fig. 5 is a schematic view of the pipeline sampling kit according to an embodiment of the present invention after installation.
As shown in fig. 1 and 2, the utility model provides a compound frock of pipeline sample, include: the compression tool 204 is composed of at least 3 pull rods 2041 and used for adjusting the compression amount of the pipeline, a circular ring is arranged on the upper end face of the compression tool 204 and used for fixing the upper end of the pull rod 2041, and a circular ring is arranged on the lower end face of the compression tool 204 and used for fixing the lower end of the pull rod 2041; and the positioning tools 205 and 206 are used for being installed at the connecting positions between the pipelines so as to limit the circumferential rotation of the pipelines.
According to the utility model discloses an embodiment, compression frock 204 comprises 4 pull rods 2041 and is used for adjusting the pipeline compression volume.
According to the utility model discloses an embodiment, compression frock 204's ring comprises two half snap ring butt joints, through the adjustable fixed of nut.
According to an embodiment of the present invention, the positioning tools 205, 206 are composed of two semicircular rings, which are butt-jointed to form a whole ring through a nut.
According to the utility model discloses an embodiment, two semicircle ring parts fretwork, the junction of being convenient for between the pipeline carries out spot welding through the fretwork.
As shown in fig. 2, according to the utility model discloses an embodiment, pipeline sample composite frock still includes: guide mandrels 207, 208 for mounting inside the joints between the pipes to limit axial sliding movement of the pipes relative to each other.
According to one embodiment of the present invention, the guiding mandrels 207, 208 are comprised of cylinders that are adapted to the size of the inner wall of the pipeline.
According to one embodiment of the present invention, the guiding mandrels 207, 208 are hollow cylinders.
On the other hand, as shown in fig. 3 and 4, the present invention further provides a pipeline sampling kit, which includes the pipeline sampling composite tool, a first sampling straight pipe 201, a second sampling straight pipe 202, and a sampling bent pipe 203; sampling elbow 203 is used for connecting between first sample straight tube 201 and second sample straight tube 202, and compression frock 204 is installed and is used for through adjusting the compression volume on first sample straight tube 201, makes sampling elbow 203 adaptation connect between first sample straight tube 201 and second sample straight tube 202, and the other end of first sample straight tube 201 is used for being connected to the storage tank bottom of the case, the other end of second sample straight tube 202 is used for being connected to on the engine.
According to the utility model discloses an embodiment, the location frock includes first location frock 205 and second location frock 206, and first location frock 205 is used for installing in the junction of sample return bend 203 and first sample straight tube 201, and second location frock 206 is used for installing in the junction of sample return bend 203 and second sample straight tube 202.
As shown in fig. 5, the specific operation of the pipeline sampling composite tool can be divided into the following steps:
s101, movably connecting a first sampling straight pipe 201 to the bottom Z of a storage box, and movably connecting a second sampling straight pipe 202 to an engine F;
s102, a compression tool 204 is arranged on the first sampling straight pipe 201;
s103, installing the sampling bent pipe 203 between the first sampling straight pipe 201 and the second sampling straight pipe 202 through rough adjustment of the compression tool 204, determining the sampling allowance of the second sampling straight pipe 202, and cutting off the sampling allowance;
s104, installing a second positioning tool 206 at the joint of the sampling bent pipe 203 and the second sampling straight pipe 202, finely adjusting the compression tool 204 until the butt joint gap between the sampling bent pipe 203 and the first sampling straight pipe 201 is tightly attached, and determining and cutting off the sampling allowance of the first sampling straight pipe 201 according to the adjustment amount of the compression tool 204;
s105, removing the compression tool 204, and installing the first positioning tool 205 at the joint of the sampling bent pipe 203 and the first sampling straight pipe 201 to complete sampling repair and temporary fixation of the pipeline assembly.
According to the utility model discloses an embodiment, installation compression frock 204 includes on first sample straight tube 201: the compression tool 204 is sleeved outside the compensator of the first sampling straight pipe 201.
In step S101, since the first sampling straight pipe 201 and the second sampling straight pipe 202 are components on the spacecraft, in order to accommodate actual production variation of the whole pipeline, the sizes of the first sampling straight pipe 201 and the second sampling straight pipe 202 are both left with a certain sampling margin from a theoretical value. The first sampling straight pipe 201 is movably connected to the bottom Z of the storage box, the second sampling straight pipe 202 is movably connected to the engine F, and the two sampling straight pipes are firstly tested.
In step S102, a compression tool 204 is installed on the first sampling straight pipe 201, and the compression tool 204 is directly sleeved outside the compensator of the first sampling straight pipe 201 to ensure that the compensator is in an initial free length state. The compression tool 204 can drive the compensator to adjust the length of the first sampling straight pipe 201.
In step 103, a sampling elbow 203 is installed between a first sampling straight pipe 201 and a second sampling straight pipe 202 for trial installation, the circumferential positions of the two sampling straight pipes on the space vehicle are preliminarily determined, the compression amount of a compression tool 204 is adjusted through rough adjustment of the compression tool 204 until the sampling elbow 203 is installed between the first sampling straight pipe 201 and the second sampling straight pipe 202, and then the sampling allowance of the second sampling straight pipe 202 is determined and cut off.
In step S104, in order to fix the sampling bent pipe 203 to the second sampling straight pipe 202 at a proper angle, a second positioning tool 206 is installed at the joint of the sampling bent pipe 203 and the second sampling straight pipe 202 to limit the circumferential rotation of the sampling bent pipe 203 and the second sampling straight pipe 202 relative to each other. The compression length of the compensator is finely adjusted through the compression tool 204 until the sampling bent pipe 203 and the first sampling straight pipe 201 are tightly attached to each other in a butt joint gap, and the sampling allowance of the first sampling straight pipe 201 is determined and cut off according to the adjustment amount of the compression length adjusted by the compression tool 204.
In step S105, the compression tool 204 is removed, and in order to fix the sampling bent pipe 203 to the first sampling straight pipe 201 at a proper angle, the first positioning tool 205 is installed at the connection position of the sampling bent pipe 203 and the first sampling straight pipe 201 to limit the circumferential rotation of the sampling bent pipe 203 and the first sampling straight pipe 201, so as to complete the sampling repair and temporary fixation of the whole pipeline assembly.
Wherein, the compound frock of pipeline sample in this embodiment is through increasing compression frock 204, first location frock 205 and second location frock 206, and cooperation first sample straight tube 201, second sample straight tube 202 and sample return bend 203 can be fast and accurately couple together storage tank bottom of the case Z and engine F, has improved the sampling efficiency and has reduced the reliance to the personnel's experience of taking a sample, has increased the accuracy of pipeline sample, provides a new method for solving the pipeline sample.
According to the utility model discloses an embodiment, the rough adjustment through compression frock 204 includes: and adjusting the compression amount of the compression tool 204, wherein the compression amount is not more than 15 mm.
Specifically, the compression amount of the compression tool 204 is adjusted according to actual conditions, and in this embodiment, the compression amount should not be greater than 15mm, so that the adjustment amount of the first sampling straight pipe 201 and the second sampling straight pipe 202 is prevented from exceeding the sampling allowance of the first sampling straight pipe and the second sampling straight pipe.
According to the utility model discloses an embodiment, the meticulous adjustment through compression frock 204 includes: the compression amount is adjusted by at least 3 pull rods 2041 arranged on the outer side face of the compression tool 204.
Specifically, in step S103, the fine adjustment of the compression tool 204 is performed by uniformly distributing at least 3 tie rods 2041 on the upper outer side of the compression tool 204 in the circumferential direction. As one embodiment, the outer side surface of the compression tool 204 may be provided with 4 pull rods 2041 which are uniformly distributed in the circumferential direction for adjustment, and two ends of each pull rod 2041 are provided with structures capable of adjusting the length of the pull rod 2041, for example, adjustment modes of nuts and screws.
According to the utility model discloses an embodiment, the fine tuning through compression frock 204 still includes: the compression amount is adjusted by at least two nuts respectively arranged on the upper end and the lower end of the compression tool 204 in the circumferential direction.
Specifically, the upper end face of the compression tool 204 is provided with a ring for fixing the upper end of the pull rod 2041, the lower end face of the compression tool 204 is provided with a ring for fixing the lower end of the pull rod 2041, and at least two nuts are uniformly distributed on the circumference of each ring for fixing, so that the compression amount is conveniently adjusted. In order to facilitate the installation of the nut, two ends of the joint of the circular rings are respectively extended outwards, the nut is installed on the extended parts at the two ends, the circumference of the circular rings is compressed when the nut is screwed down, and the circumference of the circular rings is expanded when the nut is unscrewed. As one embodiment, two nuts are arranged for fixing each circular ring, the compression amount can be adjusted at the same time, and the circular ring is formed by butting two half clamping rings.
According to an embodiment of the present invention, determining the sampling margin and cutting of the first sampling straight tube 201 comprises: the sampling allowance of the first sampling straight pipe 201 is converted by the compression amount adjusted by at least 3 tie rods 2041 of the compression tool 204.
Specifically, when the compression amount length is determined, the sampling margin of the first sampling straight tube 201 is calculated by measuring the compression length adjusted by at least 3 tie rods 2041 or the compression length adjusted by 4 tie rods 2041 through different conversion calculation methods, and the sampling margin of the first sampling straight tube 201 is removed at one time.
According to the utility model discloses an embodiment, install second location frock 206 in the junction of sample return bend 203 and second sample straight tube 202 and include: the second positioning tool 206 is installed at the outer side of the joint of the sampling bent pipe 203 and the second sampling straight pipe 202, and the second guide core rod 208 is installed at the inner side of the joint of the sampling bent pipe 203 and the second sampling straight pipe 202 so as to limit circumferential rotation and axial sliding between pipeline components.
Specifically, the second positioning tool 206 is installed outside the joint of the sampling elbow 203 and the second sampling straight pipe 202 to limit circumferential rotation between the pipe components, the second guide mandrel 208 is installed inside the joint of the sampling elbow 203 and the second sampling straight pipe 202 to limit axial sliding between the pipe components, and the second guide mandrel 208 is composed of a cylinder body adapting to the size of the inner wall of the pipe.
According to the utility model discloses an embodiment, install first location frock 205 in the junction of sample return bend 203 and first sample straight tube 201 and include: the first positioning tool 205 is installed at the outer side of the joint of the sampling bent pipe 203 and the first sampling straight pipe 201, and the first guide core rod 207 is installed at the inner side of the joint of the sampling bent pipe 203 and the first sampling straight pipe 201 so as to limit circumferential rotation and axial sliding between pipeline components.
Specifically, the first positioning tool 205 is installed outside the joint of the sampling elbow 203 and the first sampling straight pipe 201 and can limit circumferential rotation between the pipeline components, the first guide mandrel 207 is installed inside the joint of the sampling elbow 203 and the first sampling straight pipe 201 and can limit axial sliding between the pipeline components, and the first guide mandrel 207 is composed of a cylinder body adapting to the size of the inner wall of the pipeline.
According to the utility model discloses an embodiment, will first location frock 205 install and include after the junction of sample return bend 203 and first sample straight tube 201: integrally taking out a pipeline assembly consisting of the first sampling straight pipe 201, the sampling bent pipe 203 and the second sampling straight pipe 202; respectively performing spot welding on the first sampling straight pipe 201, the sampling bent pipe 203, the second sampling straight pipe 202 and the sampling bent pipe 203 in the hollow structures of the first positioning tool 205 and the second positioning tool 206; and removing the first positioning tool 205 and the second positioning tool 206 to obtain the pipeline assembly.
Specifically, after step S105, after the first positioning tool 205 and the second positioning tool 206 are installed, the first sampling straight pipe 201, the sampling bent pipe 203, and the second sampling straight pipe 202 form an integral pipeline assembly. Firstly, integrally taking out an assembled pipeline assembly, respectively performing spot welding on the joint of the first sampling straight pipe 201 and the sampling bent pipe 203 and the joint of the second sampling straight pipe 202 and the sampling bent pipe 203 in the hollow-out structures of the first positioning tool 205 and the second positioning tool 206, performing positioning spot welding on the pipeline assembly, finally removing the first positioning tool 205 and the second positioning tool 206, obtaining the pipeline assembly capable of being installed on a space carrier, and completing the task of sampling spot welding on the pipeline assembly.
According to an embodiment of the present invention, the sizes of the first sampling straight pipe 201 and the second sampling straight pipe 202 are 5-10mm larger than the theoretical value, and the size of the sampling bent pipe 203 is consistent with the theoretical value.
As shown in fig. 5, specifically, when the aerospace vehicle is initially designed, the pipelines connecting the tank bottom Z and the engine F have theoretical values, the tank bottom Z is formed by welding a plurality of melon petals, and the size of the tank bottom Z is affected by welding deformation and has a certain deviation. The mounting deviation of the interface F of the engine is accumulated, and certain deviation exists relative to the rack of the engine F and the arrow body mounting surface, so that the pipeline cannot be produced according to a theoretical model during mounting. In the present embodiment, the sizes of the first straight sampling pipe 201 and the second straight sampling pipe 202 are 5-10mm larger than the theoretical value, and the size of the bent sampling pipe 203 is consistent with the theoretical value.
The application the utility model provides a compound frock of pipeline sample adopts compression frock precompression pipeline, and two location frocks and direction plug can fix the welding seam of sample pipeline, and the pipeline is good to neutrality, can carry out the pipeline spot welding under the fixed state, have improved sample efficiency, have reduced the reliance to the sample personnel experience of taking a sample, have improved pipeline sample efficiency and accuracy.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a compound frock of pipeline sample which characterized in that includes:
the compression tool comprises at least 3 pull rods and is used for adjusting the compression amount of a pipeline, a circular ring is arranged on the upper end face of the compression tool and is used for fixing the upper ends of the pull rods, and a circular ring is arranged on the lower end face of the compression tool and is used for fixing the lower ends of the pull rods;
and the positioning tool is used for being installed at the connecting position between the pipelines so as to limit the circumferential rotation between the pipelines.
2. The pipeline sampling composite tool according to claim 1, wherein the compression tool is composed of 4 pull rods and used for adjusting the compression amount of the pipeline.
3. The pipeline sampling composite tool according to claim 1, wherein the ring of the compression tool is formed by butting two half snap rings and is adjustably fixed through a nut.
4. The pipeline sampling composite tool according to claim 1, wherein the positioning tool is composed of two semicircular rings, and the two semicircular rings are butted with each other through a nut to form a whole ring.
5. The pipeline sampling composite tool according to claim 4, wherein the two semicircular ring parts are hollowed out, so that spot welding can be conveniently carried out at the joint between the pipelines through the hollowed-out parts.
6. The pipeline sampling composite tool according to claim 1, further comprising:
and the guide core rod is used for being installed inside the connecting position between the pipelines so as to limit the axial sliding of the pipelines.
7. The pipeline sampling composite tool according to claim 6, wherein the guide core rod is composed of a cylinder body which is adaptive to the size of the inner wall of the pipeline.
8. The pipeline sampling composite tool of claim 7, wherein the guide core rod is a hollow cylinder.
9. A pipeline sampling kit, comprising the pipeline sampling composite tool according to any one of claims 1 to 8, and a first sampling straight pipe, a second sampling straight pipe and a sampling bent pipe;
the sampling elbow is used for being connected first sample straight tube with between the second sample straight tube, the compression frock is installed be used for through adjusting the compression volume on the first sample straight tube, make sampling elbow adaptation is connected first sample straight tube with between the second sample straight tube, the other end of first sample straight tube be used for being connected to the storage tank bottom of the case the other end of second sample straight tube is used for being connected to on the engine.
10. The pipeline sampling kit of claim 9, wherein the positioning tool comprises a first positioning tool and a second positioning tool, the first positioning tool is used for being installed at the joint of the sampling elbow pipe and the first sampling straight pipe, and the second positioning tool is used for being installed at the joint of the sampling elbow pipe and the second sampling straight pipe.
CN202121013230.3U 2021-05-12 2021-05-12 Pipeline sampling composite tool and external member Active CN214789481U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202121013230.3U CN214789481U (en) 2021-05-12 2021-05-12 Pipeline sampling composite tool and external member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202121013230.3U CN214789481U (en) 2021-05-12 2021-05-12 Pipeline sampling composite tool and external member

Publications (1)

Publication Number Publication Date
CN214789481U true CN214789481U (en) 2021-11-19

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