CN113653867A - Auxiliary device for butting bell and spigot of nodular cast iron pipe - Google Patents
Auxiliary device for butting bell and spigot of nodular cast iron pipe Download PDFInfo
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- CN113653867A CN113653867A CN202110990231.1A CN202110990231A CN113653867A CN 113653867 A CN113653867 A CN 113653867A CN 202110990231 A CN202110990231 A CN 202110990231A CN 113653867 A CN113653867 A CN 113653867A
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- fixing
- tensioning
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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
- F16L21/00—Joints with sleeve or socket
- F16L21/08—Joints with sleeve or socket with additional locking means
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Abstract
The application relates to an auxiliary device for socket butt joint of a nodular cast iron pipe, which relates to the field of socket butt joint technology of the nodular cast iron pipe and comprises a fixing mechanism and a tensioning piece; the fixing mechanism comprises two fixing pieces with the same shape and structure, and the two fixing pieces are named as a first fixing piece and a second fixing piece respectively; the tensioning piece is arranged between the two fixing pieces; the first fixing piece is fixed to one of the two pipelines to be butted, the second fixing piece is fixed to the other of the two pipelines to be butted, and the tensioning piece is used for pulling the first fixing piece and the second fixing piece to be close to each other so as to realize the butt joint of the two pipelines. This application has the advantage that improves pipeline butt joint efficiency.
Description
Technical Field
The application relates to the field of a socket butt joint technology of ductile cast iron pipes, in particular to an auxiliary device for socket butt joint of ductile cast iron pipes.
Background
In the process of pipeline construction, the butt joint work between two adjacent ductile cast iron pipelines is often involved, namely the process of assembling two adjacent ductile cast iron pipes together to form a pipeline, and the butt joint of the ductile cast iron pipes is generally the butt joint of sockets of the ductile cast iron pipes. For convenience of subsequent description, the end with the smaller diameter of the nodular cast iron pipe is named as a connecting end, the end with the larger diameter of the nodular cast iron pipe is named as a sleeving end, and the process that the sleeving end of one pipeline is sleeved on the connecting pipe of the other pipeline is the butt joint of the bell sockets of the nodular cast iron pipe.
In the related art, in the process of butting two adjacent ductile cast iron pipelines together, the inventor finds that in the splicing process, a worker needs to align the axes of the two pipelines, and then manually sleeve the sleeve end of one pipeline on the connecting end of the other pipeline, so that the mode of manual butting is labor-consuming and low in efficiency when the pipelines are butted.
Disclosure of Invention
In order to improve the problem that efficiency is low and extravagant manpower in the butt joint of two nodular cast-iron pipes among the relevant correlation technique, this application provides an auxiliary device is used in the butt joint of nodular cast-iron pipe bell and spigot.
The application provides a pair of auxiliary device is used in joint of nodular cast-iron pipe socket joint adopts following technical scheme:
an auxiliary device for butting bell and spigot joints of ductile cast iron pipes comprises a fixing mechanism and a tensioning piece;
the fixing mechanism comprises two fixing pieces with the same shape and structure, and the two fixing pieces are named as a first fixing piece and a second fixing piece respectively;
the tensioning piece is arranged between the two fixing pieces;
the first fixing piece is fixed to one of the two pipelines to be butted, the second fixing piece is fixed to the other of the two pipelines to be butted, and the tensioning piece is used for pulling the first fixing piece and the second fixing piece to be close to each other so as to realize the butt joint of the two pipelines.
Through adopting above-mentioned technical scheme, at the in-process of pipeline butt joint, fix two mountings to two pipelines respectively, then be close to each other through two mountings of tensioning piece pulling, can assist the staff like this to cup joint two pipelines together, improve pipeline butt joint efficiency.
Optionally, the tensioning member is a hydraulic or pneumatic cylinder.
Through adopting above-mentioned technical scheme, pneumatic cylinder or cylinder can pull two mountings and be close to each other.
Optionally, the fixing member is a ring structure;
the fixing piece comprises two splicing parts; both ends of the splicing part are fixedly connected with connecting plates;
when the two splicing parts are spliced together, the two connecting plates on the first fixing part correspond to the two connecting plates on the second fixing part one by one, and the two corresponding connecting plates are detachably fixed through bolts and nuts
Through adopting above-mentioned technical scheme, the staff splices two concatenation portions together, then fixes two concatenation portions through bolt and nut, makes two concatenation portions press from both sides tight pipeline simultaneously and can realize the fixed of mounting and pipeline.
Optionally, the fixing member is of a ring structure, and the fixing member includes an arc-shaped main body portion and two arc-shaped portions;
the main body part is less than or equal to a half circular ring;
the inner side surface of the main body part is provided with an installation groove with the same radian as the main body part, and two ends of the installation groove respectively extend to two end surfaces of the main body part; the two arc-shaped parts are connected into the mounting groove in a sliding manner;
the outer side surface of the main body portion is in threaded connection with two sets of jacking screws, the two sets of jacking screws are in one-to-one correspondence with the arc-shaped portions respectively, and the jacking screws penetrate through the wall thickness of the main body portion and jack up the arc-shaped portions.
Through adopting above-mentioned technical scheme, the staff locates the pipeline with the mounting cover on, then makes the tight screw in top on the mounting promote the arc portion and compress tightly the pipeline, can realize the fixed between mounting and the pipeline.
Optionally, the inner wall of the main body part is provided with a slideway with the same radian as the main body part; the arc-shaped parts are integrally provided with sliding blocks, and the sliding blocks on the two arc-shaped parts are connected into the slide ways in a sliding manner; the width of the slide way is larger than that of the slide block.
By adopting the technical scheme, the connection relation exists between the arc-shaped part and the main body part, so that the fixing part can be conveniently moved and transported by workers.
Optionally, the tensioning piece is provided with through holes at corresponding positions on the two fixing pieces;
the piston rod of the tensioning piece sequentially penetrates through the through holes in the two fixing pieces, the end part of the piston rod of the tensioning piece is provided with a limiting piece, and the two fixing pieces are located between the limiting piece and the cylinder body of the tensioning piece.
By adopting the technical scheme, when the piston rod of the tensioning piece retracts to the cylinder body, the action force between the limiting piece and the cylinder body can push the two fixing pieces to be close to each other, so that the butt joint effect of the two auxiliary pipelines is realized.
Optionally, the limiting member is detachably connected with the piston rod of the tensioning member.
Through adopting above-mentioned technical scheme, because the transportation requirement of taut piece and fixed establishment is different, at the in-process of auxiliary device transportation, can dismantle the classified transportation of separating back with fixed establishment and taut piece, can reduce the damage to taut piece like this.
Optionally, the limiting piece is provided with a threaded hole;
the piston rod of the tensioning piece is in threaded connection with the piston rod of the tensioning piece through the threaded hole.
By adopting the technical scheme, when pipelines which are butted together are required to be disassembled and separated, the two fixing pieces are respectively fixed on the two pipelines, the tensioning piece is arranged between the two fixing pieces, and the limiting piece is arranged on the piston rod of the tensioning piece; and then starting the tensioning piece to gradually increase the extension amount of the piston rod of the tensioning piece, so that the tensioning piece can drive the first fixing piece and the second fixing piece to be away from each other through the limiting piece, and the two spliced pipelines are driven to be separated from each other.
Optionally, a plurality of groups of guide pieces are arranged between the two fixing pieces;
guide holes are formed in the two fixing pieces corresponding to the guide pieces;
the guide piece sequentially penetrates through the guide holes of the two fixing pieces, and the two fixing pieces are connected with the guide piece in a sliding mode.
Through adopting above-mentioned technical scheme, when auxiliary device is in the butt joint of two adjacent pipelines of supplementary or dismantle the separation, the guide can play the guide effect to the relative motion between two fixings.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the two fixing pieces are respectively fixed to the two pipelines to be butted, and then the two pipelines to be butted are pulled to be close to each other through the tensioning piece, so that the pipeline butt joint can be completed by workers, and the pipeline butt joint is convenient and fast;
2. the fixing piece is provided with the two splicing parts, and the two splicing parts are fixed through the bolts and the nuts, so that the fixing piece can be fixed to the pipeline more conveniently;
3. through setting up the mounting into the form of main part and two arc portions, can be more convenient fix the mounting to the pipeline like this.
Drawings
Fig. 1 is a schematic structural diagram of an external form of an auxiliary device in embodiment 1 of the present application.
Fig. 2 is a schematic view of the auxiliary device in the working state in embodiment 1 of the present application.
Fig. 3 is a schematic view of the installation structure of the tension member of the prominent limiting member in embodiment 1 of the present application.
Fig. 4 is a schematic structural diagram of an external form of an auxiliary device in embodiment 2 of the present application.
Fig. 5 is a schematic view of the structure of the prominent slipway in embodiment 2 of the present application.
Fig. 6 is a schematic view of the auxiliary device in the working state in embodiment 2 of the present application.
Description of reference numerals: 1. a fixing member; 11. a first fixing part; 12. a second fixing part; 13. a through hole; 15. a guide hole; 16. a splice; 161. a connecting plate; 17. a main body portion; 171. mounting grooves; 172. a slideway; 173. jacking the screw tightly; 18. an arc-shaped portion; 181. a slider; 2. a tension member; 21. a limiting member; 3. a guide member; 4. a pipeline.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses auxiliary device is used in butt joint of nodular cast-iron pipe socket. Referring to fig. 1, the auxiliary device includes a fixing mechanism and a tension member 2.
The fixing mechanism comprises two fixing pieces 1 with the same shape and structure.
The tension member 2 can be a hydraulic cylinder, the tension member 2 can also be a pneumatic cylinder, and the tension member 2 is a hydraulic cylinder in the embodiment of the application. The number of the tension members 2 may be one, two or more, and in this embodiment, the number of the tension members 2 is two. Two tensioning pieces 2 are symmetrically arranged on the fixing mechanism
The tensioning piece 2 is arranged between the two fixing pieces 1, and through holes 13 are formed in the positions, corresponding to the tensioning piece 2, of the two fixing pieces 1.
A stopper 21 is mounted to the end of the piston rod of the tension member 2. The piston rod of the tension member 2 passes through the through holes 13 of the two fixing members 1 in sequence, and the two fixing members 1 are both located between the limiting member 21 and the cylinder body of the tension member 2.
Referring to fig. 2, in the process of butting the pipelines 4, firstly, two pipelines 4 to be butted are aligned, one fixing member 1 in the fixing mechanism is fixed to the connecting end of one pipeline 4 in the two pipelines 4 to be butted, the other fixing member 1 in the fixing mechanism is fixed to the sleeving end of the other pipeline 4 in the two pipelines 4 to be butted, so that the axes of the two pipelines 4 are aligned, then, two tensioning members 2 are started to retract the piston rods of the tensioning members 2, and at this time, the tensioning members 2 drive the two fixing members 1 to approach, so that the two pipelines 4 are butted together.
The limiting part 21 is detachably connected with the piston rod of the tensioning part 2, the limiting part 21 and the tensioning part 2 can be detachably connected through a bolt, namely the bolt sequentially penetrates through the limiting part 21 and the tensioning part 2, the bolt is in threaded connection with the limiting part 21, and the bolt is in threaded connection with the piston rod of the tensioning part 2.
Referring to fig. 3, in the present embodiment, a threaded hole is formed in the limiting member 21, and the piston rod of the tensioning member 2 is in threaded connection with the limiting member 21 through the threaded hole in the limiting member 21, so that the limiting member 21 and the piston rod of the tensioning member 2 can be detachably connected.
Because the piston rod of the limiting part 21 and the tensioning part 2 is detachably connected, when the auxiliary device is not used, a worker can detach the limiting part 21 from the piston rod of the tensioning part 2, then detach the tensioning part 2 from the two fixing parts 1, and classify and transport the fixing mechanism and the tensioning part 2.
Referring to fig. 2, for convenience of subsequent description, two fixing members 1 are respectively named as a first fixing member 11 and a second fixing member 12.
When two pipelines 4 which are butted together are required to be disassembled and separated, the fixing piece I11 is fixed to the connecting end of one pipeline 4 in the two pipelines 4 to be butted, the fixing piece II 12 is fixed to the sleeving end of the other pipeline 4 in the two pipelines 4 to be butted, the limiting piece 21 is installed on the piston rod of the tensioning piece 2, and then the tensioning piece 2 is placed between the two fixing pieces 1; and then starting the tensioning member 2 to gradually increase the extension amount of the piston rod of the tensioning member 2, so that the tensioning member 2 can drive the first fixing member 11 and the second fixing member 12 to be away from each other, and the two spliced pipelines 4 are driven to be separated from each other.
Referring to fig. 2, further, a plurality of sets of guiding members 3 are disposed between the two fixing members 1, and the guiding members 3 are disposed to guide the relative movement between the two fixing members 1 when the auxiliary device assists the abutting or detaching of the two adjacent pipes 4.
Specifically, the guide 3 is a rod-shaped structure with a circular cross section, guide holes 15 are formed in the corresponding positions of the guide 3 on the two fixing members 1, the guide 3 sequentially penetrates through the guide holes 15 on the two fixing members 1, and the guide 3 is connected with the guide 3 in a sliding manner through the guide holes 15.
The both ends of guide 3 are all threaded connection has the nut, and two mounting 1 all are located between two nuts.
The purpose that two nuts set up is in the auxiliary device transportation or the in-process that removes, can use the cooperation of guide bar and two nuts to assemble two mounting 1 and transport or remove as a whole a fixed establishment, and fixed establishment's removal or transportation can be more convenient like this.
Example 1
Referring to fig. 1, the two fixing members 1 are in a ring structure with the same shape and structure, and the inner diameter of the first fixing member 11 in the two fixing members 1 is smaller than the inner diameter of the second fixing member 12, and the axis of the first fixing member 11 is collinear with the axis of the second fixing member 12. The guide 3 and the two tension members 2 are arranged in the axial direction of the fixing mechanism. And a plurality of guide members 3 are uniformly arranged around the axis of the first fixing member 11.
The fixing member 1 includes two splicing parts 16 with the same shape, the two ends of the splicing part 16 are fixedly connected with connecting plates 161, and when the two splicing parts 16 are spliced together, the two corresponding connecting plates 161 are detachably fixed by bolts and nuts.
In embodiment 1 of the present application, an implementation principle of an auxiliary device for socket docking of a ductile cast iron pipe is as follows: in the process of butting the pipelines 4, firstly, aligning the pipelines 4 to be butted, fixing a first fixing piece 11 to the connecting end of one pipeline 4 of the two pipelines 4 to be butted, fixing a second fixing piece 12 to the sleeving end of the other pipeline 4 of the two pipelines 4 to be butted, in the fixing process, firstly, separating the two splicing parts 16, then sleeving the two splicing parts 16 on the pipelines 4, then, fixing the two splicing parts 16 together through bolts and nuts, and enabling the two splicing parts 16 to clamp the pipelines 4; and then fixing the second fixing piece 12 to the pipeline 4 with the larger diameter in the two pipelines 4 to be butted according to the same mode. And a plurality of guide members 3 are installed between the first fixing member 11 and the second fixing member 12.
Then, the two tensioning pieces 2 are installed between the first fixing piece 11 and the second fixing piece 12, the piston rods of the tensioning pieces 2 sequentially penetrate through the through holes 13 in the two fixing pieces 1 in the installation process, then the limiting piece 21 is installed on the piston rods of the tensioning pieces 2, the two tensioning pieces 2 are sequentially installed according to the mode, the two tensioning pieces 2 are started, the piston rods of the tensioning pieces 2 retract, and the tensioning pieces 2 drive the first fixing piece 11 and the second fixing piece 12 to be close to each other, so that the two pipelines 4 are in butt joint.
Example 2
Referring to fig. 4, the two fixing members 1 are in an annular structure with the same shape and structure, each fixing member 1 includes a main body portion 17 and two arc portions 18, the main body portion 17 is a half ring, an installation groove 171 with a radian corresponding to the main body portion 17 is formed in the inner side surface of the main body portion 17, and two ends of the installation groove 171 extend to end surfaces of two ends of the main body portion 17.
Two arc portions 18 are quarter rings, the radian of two arc portions 18 is adapted to main body portion 17, and two arc portions 18 are connected into main body portion 17 in a sliding manner.
Referring to fig. 5, a slide 172 is disposed on a side wall of the mounting groove 171, the slide 172 is arc-shaped, and the arc of the slide 172 is adapted to the arc of the mounting groove 171.
The two corresponding arc-shaped parts 18 are integrally provided with sliding blocks 181 matched with the radian of the main body part 17, and the sliding blocks 181 on the two arc-shaped parts 18 are connected into the slide ways 172 in a sliding manner.
The width of the slide way 172 is greater than that of the slide block 181, two tightening screws 173 are connected to the outer side surface of the main body portion 17 in a threaded manner, the two tightening screws 173 correspond to the two arc-shaped portions 18 one by one, and the tightening screws 173 can penetrate through the wall thickness of the main body portion 17 and extend into the mounting groove 171 to tighten the arc-shaped portions 18.
Because main part 17 is half ring, arc portion 18 is the quarter ring, installing mounting 1 to the in-process of pipeline 4 like this, can hide two arc portions 18 in main part 17 at first, then make the medial surface of main part 17 set up in the top of pipeline 4, later remove the restriction to arc portion 18, arc portion 18 can the lapse under the action of gravity of self, later promote arc portion 18 through the tight screw 173 in top and compress tightly pipeline 4 can, easy operation and convenient.
In embodiment 2 of the present application, an implementation principle of an auxiliary device for socket docking of a ductile cast iron pipe is as follows: referring to fig. 6, in the process of butting the pipelines 4, firstly, the pipelines 4 to be butted are aligned, the first fixing piece 11 is fixed to the connecting end of one pipeline 4 of the two pipelines 4 to be butted, and the second fixing piece 12 is fixed to the sleeving end of the other pipeline 4 of the two pipelines 4 to be butted, in the fixing process, firstly, the main body part 17 is lapped on the top of the pipeline 4, the inner side surface of the main body part 17 is attached to the pipelines 4, the two arc-shaped parts 18 slide downwards under the action of self gravity, and then, the arc-shaped parts 18 are pushed by using the tightening screws 173 to clamp the pipelines 4; and a plurality of guide members 3 are installed between the first fixing member 11 and the second fixing member 12.
Then, the two tensioning pieces 2 are installed between the first fixing piece 11 and the second fixing piece 12, the piston rods of the tensioning pieces 2 sequentially penetrate through the through holes 13 in the two fixing pieces 1 in the installation process, then the limiting piece 21 is installed on the piston rods of the tensioning pieces 2, the two tensioning pieces 2 are sequentially installed according to the mode, the two tensioning pieces 2 are started, the piston rods of the tensioning pieces 2 retract, and the tensioning pieces 2 drive the first fixing piece 11 and the second fixing piece 12 to be close to each other, so that the two pipelines 4 are in butt joint.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (9)
1. The utility model provides an auxiliary device is used in butt joint of nodular cast-iron pipe socket, its characterized in that: comprises a fixing mechanism and a tensioning piece (2);
the fixing mechanism comprises two fixing pieces (1) with the same shape and structure, and the two fixing pieces (1) are named as a first fixing piece (11) and a second fixing piece (12) respectively;
the tensioning piece (2) is arranged between the two fixing pieces (1);
the first fixing piece (11) is fixed to one pipeline (4) of the two pipelines (4) to be butted, the second fixing piece (12) is fixed to the other pipeline (4) of the two pipelines (4) to be butted, and the tensioning piece (2) is used for pulling the first fixing piece (11) and the second fixing piece (12) to be close to each other so as to realize the butt joint of the two pipelines (4).
2. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 1, wherein: the tensioning member (2) is a hydraulic or pneumatic cylinder.
3. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 2, wherein: the fixing piece (1) is of an annular structure;
the fixing piece (1) comprises two splicing parts (16); both ends of the splicing part (16) are fixedly connected with connecting plates (161);
when the two splicing parts (16) are spliced together, the two connecting plates (161) on the first fixing piece (11) correspond to the two connecting plates (161) on the second fixing piece (12) one by one, and the two corresponding connecting plates (161) are detachably fixed through bolts and nuts.
4. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 2, wherein: the fixing piece (1) is of an annular structure, and the fixing piece (1) comprises an arc-shaped main body part (17) and two arc-shaped parts (18);
the body portion (17) is less than or equal to a half ring;
the inner side surface of the main body part (17) is provided with an installation groove (171) with the same radian as that of the main body part (17), and two ends of the installation groove (171) respectively extend to two end surfaces of the main body part (17); the two arc-shaped parts (18) are connected into the mounting groove (171) in a sliding manner;
the lateral surface threaded connection of main part (17) has two sets of tight screws in top (173), two sets of tight screws in top (173) respectively with two arc portion (18) one-to-one, tight screw in top (173) pass the wall thickness top of main part (17) tightly arc portion (18).
5. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 4, wherein: the inner wall of the main body part (17) is provided with a slideway (172) with the same radian as the main body part (17); the arc-shaped parts (18) are integrally provided with sliding blocks (181), and the sliding blocks (181) on the two arc-shaped parts (18) are connected into the slide ways (172) in a sliding manner; the width of the slide way (172) is larger than that of the sliding block (181).
6. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 2, 3, 4 or 5, wherein: through holes (13) are formed in the corresponding positions of the tensioning piece (2) on the two fixing pieces (1);
the piston rod of the tensioning piece (2) sequentially penetrates through the through holes (13) in the two fixing pieces (1), the limiting piece (21) is installed at the end part of the piston rod of the tensioning piece (2), and the two fixing pieces (1) are located between the limiting piece (21) and the cylinder body of the tensioning piece (2).
7. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 6, wherein: the limiting part (21) is detachably connected with a piston rod of the tensioning part (2).
8. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 7, wherein: the limiting piece (21) is provided with a threaded hole;
the piston rod of the tensioning piece (2) is in threaded connection with the piston rod of the tensioning piece (2) through the threaded hole.
9. The auxiliary device for the bell and spigot joint of the nodular cast iron pipe as claimed in claim 1, wherein: a plurality of groups of guide pieces (3) are arranged between the two fixing pieces (1);
guide holes (15) are formed in the two fixing pieces (1) corresponding to the guide pieces (3);
the guide piece (3) sequentially penetrates through two guide holes (15) of the fixing piece (1), and the fixing piece (1) is connected with the guide piece (3) in a sliding mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990231.1A CN113653867A (en) | 2021-08-26 | 2021-08-26 | Auxiliary device for butting bell and spigot of nodular cast iron pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110990231.1A CN113653867A (en) | 2021-08-26 | 2021-08-26 | Auxiliary device for butting bell and spigot of nodular cast iron pipe |
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| Publication Number | Publication Date |
|---|---|
| CN113653867A true CN113653867A (en) | 2021-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110990231.1A Pending CN113653867A (en) | 2021-08-26 | 2021-08-26 | Auxiliary device for butting bell and spigot of nodular cast iron pipe |
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| CN (1) | CN113653867A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837085A (en) * | 2022-04-19 | 2022-08-02 | 中交第二航务工程局有限公司 | Self-adaptive high-water-level variable reservoir area bridge concrete pumping device and construction method |
-
2021
- 2021-08-26 CN CN202110990231.1A patent/CN113653867A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837085A (en) * | 2022-04-19 | 2022-08-02 | 中交第二航务工程局有限公司 | Self-adaptive high-water-level variable reservoir area bridge concrete pumping device and construction method |
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