CN109403320A - A kind of tubular pole with self-locking joint - Google Patents
A kind of tubular pole with self-locking joint Download PDFInfo
- Publication number
- CN109403320A CN109403320A CN201811569624.XA CN201811569624A CN109403320A CN 109403320 A CN109403320 A CN 109403320A CN 201811569624 A CN201811569624 A CN 201811569624A CN 109403320 A CN109403320 A CN 109403320A
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- China
- Prior art keywords
- inserting section
- tubular pole
- self
- mounting hole
- female
- Prior art date
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/52—Piles composed of separable parts, e.g. telescopic tubes ; Piles composed of segments
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
Abstract
The invention discloses a kind of tubular poles with self-locking joint, including tubular pole ontology, male connector and female, male connector is by the first inserting section, second inserting section and limiting plate composition, limiting plate is connected to one end of tubular pole ontology, first inserting section is connect by the second inserting section with limiting plate, the first mounting hole and the second mounting hole are offered in female, first mounting hole is opened up along the length direction of female with the second mounting hole, first mounting hole and the second mounting hole are through-hole and are interconnected, first mounting hole is between the second mounting hole and tubular pole ontology, multiple self-fastening buttons are provided in first mounting hole, the annular spacing groove clamped for self-fastening button is offered on the side wall of first inserting section.For the present invention by the way that male connector and female progress pile extension is respectively set at the both ends of tubular pole ontology, it is convenient to operate, and can effectively improve pile extension efficiency and pile extension quality, reduces pile extension cost, increases the connection reliability between two neighboring tubular pole.
Description
Technical field
The invention belongs to construction engineering technical fields, and in particular to a kind of tubular pole with self-locking joint.
Background technique
Tubular pole is widely used in building field, and when tubular pole piling construction, most of work progress all inevitably encounters
Pile extension problem.Currently, by the connector of two tubular poles to be spliced together to after upper, being used when carrying out pile extension during tube pile construction
Spot welding is welded, and welding technique is time-consuming and laborious, and construction cost is higher, and causes shadow to builder's health and ambient enviroment
Ring, and construction quality is limited by the technical level of welder, construction quality often due to Welder's technical level it is irregular
It is uneven and have a greatly reduced quality.
Summary of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of with self-locking
The tubular pole of connector, by the way that male connector and female progress pile extension is respectively set at the both ends of tubular pole ontology, it is convenient to operate, and can effectively mention
High pile extension efficiency and pile extension quality reduce pile extension cost, increase the connection reliability between two neighboring tubular pole.
In order to solve the above technical problems, the technical solution adopted by the present invention is that: a kind of tubular pole with self-locking joint, it is special
Sign is: including tubular pole ontology and being separately positioned on the male connector and female at tubular pole ontology both ends, the male connector is by the first grafting
Section, the second inserting section and limiting plate composition, the limiting plate are connected to one end of tubular pole ontology, and first inserting section is logical
The second inserting section is crossed to connect with limiting plate, offered in the female the first mounting hole matched with the first inserting section, with
And the second mounting hole matched with the second inserting section, first mounting hole and the second mounting hole are along the length direction of female
It opens up, first mounting hole and the second mounting hole are through-hole and are interconnected, and first mounting hole is located at the second installation
Between hole and tubular pole ontology, it is provided with multiple self-fastening buttons in first mounting hole, is opened up on the side wall of first inserting section
There is the annular spacing groove clamped for self-fastening button.
Above-mentioned a kind of tubular pole with self-locking joint, it is characterised in that: first inserting section, the second inserting section and limit
Position pedestal is integrally formed, and the male connector and female are poured with tubular pole ontology and be integrated.
Above-mentioned a kind of tubular pole with self-locking joint, it is characterised in that: the self-fastening button is mounted on female by spring
On, multiple guide grooves mobile for self-fastening button are offered in the female, the guide groove is connected to the first mounting hole, the bullet
One end of spring is connected on the inner sidewall of guide groove, and the other end of the spring is connected on self-fastening button.
Above-mentioned a kind of tubular pole with self-locking joint, it is characterised in that: the self-fastening button is wedge buckle or trapezoid buckle.
Above-mentioned a kind of tubular pole with self-locking joint, it is characterised in that: first inserting section and limiting plate are
The diameter of cylinder, the limiting plate is equal with the outer diameter of tubular pole ontology, and the diameter of first inserting section is less than tubular pole sheet
The internal diameter of body.
A kind of above-mentioned tubular pole with self-locking joint, it is characterised in that: second inserting section be rotary table, described second
The upper bottom surface of inserting section is connect with the first inserting section, and the bottom surface of second inserting section is connect with limiting plate, and described first
Inserting section, the second inserting section and limiting plate are in coaxial laying, the upper bottom surface diameter of second inserting section and the first grafting
The diameter of section is equal, and the bottom surface diameter of second inserting section is greater than the diameter of the first inserting section and it is not more than limiting plate
Diameter.
Above-mentioned a kind of tubular pole with self-locking joint, it is characterised in that: offered along its length in the male connector
Circular through hole, the circular through hole are connected to tubular pole ontology.
A kind of above-mentioned tubular pole with self-locking joint, it is characterised in that: the female be cylinder, the female it is straight
Diameter is equal with the outer diameter of tubular pole ontology.
Compared with the prior art, the present invention has the following advantages:
1, the present invention is by being respectively set male connector and female at the both ends of tubular pole ontology, in the company for carrying out adjacent two sections of tubular poles
When connecing, it is only necessary to the male connector of one section of tubular pole is inserted in the female of another section of tubular pole, it is convenient to operate, and it is time saving and energy saving, together
When can effectively save construction cost.
2, the present invention inside female by being arranged multiple self-fastening buttons, and the ring clamped for self-fastening button is offered in male connector
The self-locking connection of two neighboring tubular pole may be implemented in shape limiting slot, and structure is simple, at the same can effectively improve two neighboring tubular pole it
Between connection reliability.
3, the present invention is integrated by pouring male connector and female with tubular pole ontology, can make male connector and female and tubular pole
The ontology same service life, avoid as connect it is not close and caused by accident resulting from poor quality of projects.
In conclusion the present invention is by being respectively set male connector and female progress pile extension at the both ends of tubular pole ontology, operation is just
Victory can effectively improve pile extension efficiency and pile extension quality, reduce pile extension cost, and the connection increased between two neighboring tubular pole is reliable
Property.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the left view of Fig. 1.
Fig. 4 is usage state diagram of the invention.
Description of symbols:
1-tubular pole ontology；2-male connectors；The first inserting section of 2-1-；
2-1-1-annular spacing groove；The second inserting section of 2-2-；2-3-limiting plate；
2-4-circular through hole；3-females；The first mounting hole of 3-1-；
The second mounting hole of 3-2-；3-3-guide groove；4-self-fastening buttons；
5-springs.
Specific embodiment
As shown in Figure 1, the present invention includes tubular pole ontology 1 and the male connector 2 for being separately positioned on 1 both ends of tubular pole ontology and mother
First 3, the male connector 2 is made of the first inserting section 2-1, the second inserting section 2-2 and limiting plate 2-3, and the limiting plate 2-3 connects
It connects in one end of tubular pole ontology 1, the first inserting section 2-1 is connect by the second inserting section 2-2 with limiting plate 2-3, described
It offers the first mounting hole 3-1 matched with the first inserting section 2-1 in female 3 and is matched with the second inserting section 2-2
Second length direction of mounting hole 3-2, the first mounting hole 3-1 with the second mounting hole 3-2 along female 3 opens up, and described
One mounting hole 3-1 and the second mounting hole 3-2 is through-hole and is interconnected, and the first mounting hole 3-1 is located at the second mounting hole
Between 3-2 and tubular pole ontology 1, multiple self-fastening buttons 4, the side of the first inserting section 2-1 are provided in the first mounting hole 3-1
The annular spacing groove 2-1-1 clamped for self-fastening button 4 is offered on wall.
As shown in figure 4, in actual use, by the way that male connector 2 and female 3 is respectively set at the both ends of tubular pole ontology 1, carrying out
When the connection of adjacent two sections of tubular poles, it is only necessary to the male connector 2 of one section of tubular pole is inserted into the female 3 of another section of tubular pole, grasped
It is convenient to make, time saving and energy saving, while can effectively save construction cost.
Particularly, it by the way that multiple self-fastening buttons 4 are arranged inside female 3, and offers in male connector 2 and is clamped for self-fastening button 4
Annular spacing groove 2-1-1, the self-locking connection of two neighboring tubular pole may be implemented, structure is simple, while can effectively improve adjacent
Connection reliability between two tubular poles.By offering the annular spacing groove 2-1-1 clamped for self-fastening button 4, energy in male connector 2
Quick pile extension and self-locking function are enough realized, so that two neighboring tubular pole when carrying out pile extension, does not need the insertion of adjustment self-fastening button 4
Angle, it is convenient and efficient.
It should be noted that the quantity of the self-fastening button 4 is preferably three, since triangle has stability,
Three self-fastening buttons 4 can guarantee that two neighboring tubular pole is bonded, and three self-fastening buttons 4 are uniformly distributed on the same circumference.
In the present embodiment, the first inserting section 2-1, the second inserting section 2-2 and limiting plate 2-3 are integrally formed, described
Male connector 2 and female 3, which are poured with tubular pole ontology 1, to be integrated.
In actual use, the male connector 2 and female 3 are made by metal material processing, are carrying out pouring for tubular pole
When, by the way that the male connector 2 and female 3 to be separately positioned on to the two sides of tubular pole ontology 1, make the male connector 2 and female 3 and tubular pole
Ontology 1, which pours, to be integrated, and the male connector 2 and female 3 and the same service life of tubular pole ontology 1 can be made, avoid due to connect it is not close and
Caused by accident resulting from poor quality of projects.
In the present embodiment, the self-fastening button 4 is mounted in female 3 by spring 5, and it is multiple right to offer in the female 3
The guide groove 3-3 that self-fastening button 4 is oriented to, the guide groove 3-3 are connected to the first mounting hole 3-1, and one end of the spring 5 connects
It connects on the inner sidewall of guide groove 3-3, the other end of the spring 5 is connected on self-fastening button 4.
In actual use, when spring 5 is under free state, one end of the self-fastening button 4 is located in guide groove 3-3,
It can guarantee male connector 2 fashionable to 3 interpolation of female, self-fastening button 4 will not be skidded off out of guide groove 3-3 under the extruding of male connector 2,
And then the inside of the first mounting hole 3-1 is extruded into close to the side of tubular pole ontology 1, the forfeiture self-locking of self-fastening button 4；It is described from
The other end of lock 4 is located in the first mounting hole 3-1, it can be ensured that fashionable to 3 interpolation of female, self-fastening button 4 can contract male connector 2
It returns in guide groove 3-3, when male connector 2 is fully inserted into female 3, self-fastening button 4 returns to initial bit under the elastic force effect of spring
It sets, i.e., one end of self-fastening button 4 is located in the annular spacing groove 2-1-1 of male connector 2 and male connector 2 and female 3 are locked.
Particularly, by the way that self-fastening button 4 is connected in female 3 with spring 5, it can guarantee that self-fastening button 4 is being squeezed back
Initial position most can be returned under in spring 5 after to the inside guide groove 3-3, realize the self-locking of tubular pole.By in the mother
The guide groove 3-3 that multiple pairs of self-fastening buttons 4 are oriented to is offered in first 3, self-fastening button 4 can be oriented to, be made self-fastening button edge
Linear motion.
In the present embodiment, the self-fastening button 4 is wedge buckle or trapezoid buckle.
In actual use, the self-fastening button 4 is preferably trapezoid buckle, and the self-fastening button 4 includes being arranged in guide groove 3-3
Interior rectangular block and it is connected to the trapezoid block matched outside rectangular block with annular spacing groove 2-1-1, by trapezoid block
Rectangular block is arranged in side, and self-fastening button 4 can be enable to move along a straight line in guide groove 3-3, avoid self-fastening button 4 that skew occurs, together
When trapezoid buckle intensity it is larger, can guarantee that the self-locking of two neighboring tubular pole may be implemented after male connector 2 is inserted into female 3, keep away
Exempt from two neighboring tubular pole when stress is excessive, the self-locking function failure of self-fastening button 4.
As shown in Fig. 2, the first inserting section 2-1 and limiting plate 2-3 are cylinder in the present embodiment, described
The diameter of one inserting section 2-1 is less than the diameter of limiting plate 2-3, the diameter of the limiting plate 2-3 and the outer diameter of tubular pole ontology 1
Equal, the diameter of the first inserting section 2-1 is less than the internal diameter of tubular pole ontology 1.
In actual use, by setting cylindrical for limiting plate 2-3, and make the outer diameter of its diameter Yu tubular pole ontology 1
It is equal, it can guarantee that limiting plate 2-3 is completely embedded with tubular pole ontology 1, while being convenient for the first inserting section 2-1 and the second inserting section
The installation of 2-2 makes the diameter of the first inserting section 2-1 be less than the internal diameter of tubular pole ontology 1, can guarantee female 3 and tubular pole sheet
The connection reliability of body 1.
In the present embodiment, the second inserting section 2-2 is rotary table, and the upper bottom surface of the second inserting section 2-2 and first insert
A section 2-1 connection is connect, the bottom surface of the second inserting section 2-2 is connect with limiting plate 2-3, the first inserting section 2-1, second
Inserting section 2-2 and limiting plate 2-3 is in coaxial laying, the upper bottom surface diameter and the first inserting section of the second inserting section 2-2
The diameter of 2-1 is equal, and the bottom surface diameter of the second inserting section 2-2 is greater than the diameter of the first inserting section 2-1 and it is not more than
The diameter of limiting plate 2-3.
In actual use, by setting cylindrical for the first inserting section 2-1, and set round for the second inserting section 2-2
Platform, can be improved pile extension efficiency, and when pile extension only needs to inject male connector 2 in female 3, not need to look for angle.
It should be noted that the bottom surface diameter of the second inserting section 2-2 is equal to the internal diameter of tubular pole ontology 1, it can be true
The minimum wall thickness (MINI W.) for protecting female 3 is not less than the wall thickness of tubular pole ontology 1, so that female 3 is had certain intensity, and then guarantee two neighboring
Connective stability between tubular pole.
In the present embodiment, offer circular through hole 2-4 in the male connector 2 along its length, the circular through hole 2-4 with
Tubular pole ontology 1 is connected to.
In actual use, by opening up a circular through hole 2-4 along its length in male connector 2, make two neighboring pipe
Stake is connected to by the through-hole, carries out mortar depositing construction to tubular pole convenient for subsequent.
As shown in figure 3, in the present embodiment, the female 3 is cylinder, the diameter of the female 3 and tubular pole ontology 1 it is outer
Diameter is equal.
The present invention is in use, the male connector 2 of a tubular pole is injected in the female 3 of another tubular pole, as the first inserting section 2-1
During the first mounting hole 3-1 is inserted into across the second mounting hole 3-2, extruding of the self-fastening button 4 by the first inserting section 2-1
Afterwards, it is retracted in guide groove 3-3, after male connector 2 is fully inserted into female 3, self-fastening button 4 is installed on first under the action of spring 5
In annular spacing groove 2-1-1 on inserting section 2-1, the self-locking connection of two neighboring tubular pole is realized.
The above is only presently preferred embodiments of the present invention, is not intended to limit the invention in any way, it is all according to the present invention
Technical spirit any simple modification to the above embodiments, change and equivalent structural changes, still fall within skill of the present invention
In the protection scope of art scheme.
Claims (8)
1. a kind of tubular pole with self-locking joint, it is characterised in that: including tubular pole ontology (1) and be separately positioned on tubular pole sheet
The male connector (2) and female (3) at body (1) both ends, the male connector (2) is by the first inserting section (2-1), the second inserting section (2-2) and limit
Position pedestal (2-3) forms, and the limiting plate (2-3) is connected to one end of tubular pole ontology (1), first inserting section (2-1)
It is connect, is offered on the female (3) and the first inserting section (2-1) phase with limiting plate (2-3) by the second inserting section (2-2)
The first mounting hole (3-1) of cooperation and the second mounting hole (3-2) matched with the second inserting section (2-2), first peace
It fills the length direction of hole (3-1) with the second mounting hole (3-2) along female (3) to open up, first mounting hole (3-1) and second
Mounting hole (3-2) is through-hole and is interconnected, and first mounting hole (3-1) is located at the second mounting hole (3-2) and tubular pole sheet
Between body (1), it is provided with multiple self-fastening buttons (4) in first mounting hole (3-1), the side wall of first inserting section (2-1)
On offer one for self-fastening button (4) clamp annular spacing groove (2-1-1).
2. a kind of tubular pole with self-locking joint described in accordance with the claim 1, it is characterised in that: the first inserting section (2-
1), the second inserting section (2-2) and limiting plate (2-3) are integrally formed, the male connector (2) and female (3) with tubular pole ontology (1)
It pours and is integrated.
3. a kind of tubular pole with self-locking joint described in accordance with the claim 1, it is characterised in that: the self-fastening button (4) passes through
Spring (5) is connect with female (3), offers the guide groove (3-3) that multiple pairs of self-fastening buttons (4) are oriented in the female (3),
The guide groove (3-3) is connected to the first mounting hole (3-1), and one end of the spring (5) is connected to the inside of guide groove (3-3)
On wall, the other end of the spring (5) is connected on self-fastening button (4).
4. a kind of tubular pole with self-locking joint according to claim 1 or 2, it is characterised in that: the self-fastening button (4) is
Wedge buckle or trapezoid buckle.
5. a kind of tubular pole with self-locking joint according to claim 1 or 2, it is characterised in that: first inserting section
(2-1) and limiting plate (2-3) are cylinder, and the diameter of first inserting section (2-1) is straight less than limiting plate (2-3)
The diameter of diameter, the limiting plate (2-3) is equal with the outer diameter of tubular pole ontology (1), and the diameter of first inserting section (2-1) is small
Internal diameter in tubular pole ontology (1).
6. a kind of tubular pole with self-locking joint according to claim 5, it is characterised in that: the second inserting section (2-
It 2) is rotary table, the upper bottom surface of second inserting section (2-2) is connect with the first inserting section (2-1), second inserting section (2-2)
Bottom surface connect with limiting plate (2-3), first inserting section (2-1), the second inserting section (2-2) and limiting plate (2-
3) it is laid in coaxial, the upper bottom surface diameter of second inserting section (2-2) is equal with the diameter of the first inserting section (2-1), institute
It states diameter of the bottom surface diameter greater than the first inserting section (2-1) of the second inserting section (2-2) and it is not more than limiting plate (2-3)
Diameter.
7. a kind of tubular pole with self-locking joint according to claim 1 or 2, it is characterised in that: edge on the male connector (2)
Its length direction offers circular through hole (2-4), and the circular through hole (2-4) is connected to tubular pole ontology (1).
8. a kind of tubular pole with self-locking joint according to claim 1 or 2, it is characterised in that: the female (3) is circle
The diameter of cylindricality, the female (3) is equal with the outer diameter of tubular pole ontology (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569624.XA CN109403320A (en) | 2018-12-21 | 2018-12-21 | A kind of tubular pole with self-locking joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811569624.XA CN109403320A (en) | 2018-12-21 | 2018-12-21 | A kind of tubular pole with self-locking joint |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109403320A true CN109403320A (en) | 2019-03-01 |
Family
ID=65460334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811569624.XA Pending CN109403320A (en) | 2018-12-21 | 2018-12-21 | A kind of tubular pole with self-locking joint |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109403320A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112593550A (en) * | 2020-11-10 | 2021-04-02 | 柏铁全 | Prestressed concrete tubular pile locking type mechanical quick joint |
| CN114508096A (en) * | 2022-03-03 | 2022-05-17 | 李硕 | Cement precast pile connecting piece |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04136393U (en) * | 1991-06-11 | 1992-12-18 | 日東工器株式会社 | pipe fittings |
| WO2003012212A1 (en) * | 2001-08-01 | 2003-02-13 | Zhaohong Zhong | A joint for connecting the members of preformed prestressed concrete pipe pile |
| CN1676774A (en) * | 2005-05-17 | 2005-10-05 | 周兆弟 | Eleastic expansion meshing body pile connecting end plate and prefab |
| CN1676772A (en) * | 2005-05-17 | 2005-10-05 | 周兆弟 | Double-end inserting elastic meshing body pile connecting fastener and prefab |
| CN204385725U (en) * | 2014-12-30 | 2015-06-10 | 韩雪峰 | Pile body mechanical connecting device |
-
2018
- 2018-12-21 CN CN201811569624.XA patent/CN109403320A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04136393U (en) * | 1991-06-11 | 1992-12-18 | 日東工器株式会社 | pipe fittings |
| WO2003012212A1 (en) * | 2001-08-01 | 2003-02-13 | Zhaohong Zhong | A joint for connecting the members of preformed prestressed concrete pipe pile |
| CN1676774A (en) * | 2005-05-17 | 2005-10-05 | 周兆弟 | Eleastic expansion meshing body pile connecting end plate and prefab |
| CN1676772A (en) * | 2005-05-17 | 2005-10-05 | 周兆弟 | Double-end inserting elastic meshing body pile connecting fastener and prefab |
| CN204385725U (en) * | 2014-12-30 | 2015-06-10 | 韩雪峰 | Pile body mechanical connecting device |
Non-Patent Citations (1)
| Title |
|---|
| 上海锁具技术教材编写组编: "《锁具机械加工工艺》", 31 January 1991, 上海科学普及出版社, pages: 325 - 326 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112593550A (en) * | 2020-11-10 | 2021-04-02 | 柏铁全 | Prestressed concrete tubular pile locking type mechanical quick joint |
| CN114508096A (en) * | 2022-03-03 | 2022-05-17 | 李硕 | Cement precast pile connecting piece |
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