CN112325008B - Novel double-nut pipe joint - Google Patents
Novel double-nut pipe joint Download PDFInfo
- Publication number
- CN112325008B CN112325008B CN202011304458.8A CN202011304458A CN112325008B CN 112325008 B CN112325008 B CN 112325008B CN 202011304458 A CN202011304458 A CN 202011304458A CN 112325008 B CN112325008 B CN 112325008B
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- nut
- groove
- accommodating groove
- fixture block
- clamping groove
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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
- F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
- F16L15/08—Screw-threaded joints; Forms of screw-threads for such joints with supplementary elements
Abstract
The invention provides a novel double-nut pipe joint which comprises a joint body, a first nut, a second nut, a third nut and a fixed lantern ring, wherein the first nut is fixedly connected with the joint body; the first nut and the second nut have the same size parameters; the first nut and the second nut are sequentially connected to the joint body in a threaded manner; one end of the first nut, facing the second nut, is provided with an external thread section, and the third nut is in threaded connection with the external thread section; the inner ring and the outer ring of the fixed lantern ring are both in a regular hexagon shape, the inner ring of the fixed lantern ring is matched with the outer rings of the first nut and the second nut, and the radius of an inscribed circle of the fixed lantern ring is larger than that of an circumscribed circle of the third nut; the side edges of the first nut, the second nut and the third nut are respectively provided with a first clamping groove, a second clamping groove and a third clamping groove, and the groove bottoms of the first clamping groove, the second clamping groove and the third clamping groove are flush and have the same width; and clamping blocks are arranged on the fixed lantern ring corresponding to the first clamping groove, the second clamping groove and the third clamping groove. The invention has the characteristic of high connection stability.
Description
Technical Field
The invention relates to a pipe fitting, in particular to a novel double-nut pipe joint.
Background
The pipe joint is a connecting tool between a pipeline and a connecting point between an element and the pipeline, and can be disassembled and assembled. Plays an indispensable important role in the pipe fitting, which is one of the two main components of the hydraulic pipe. The pipe joint is used for straight line connection of instruments and the like, and the connection form is socket welding or threaded connection. The device is mainly used for low-pressure pipelines with small calibers, parts needing to be frequently assembled and disassembled or final adjustment of pipelines using threaded pipes. The structure form is preferably a metal surface contact sealing structure, and the gasket sealing structure form is usually used for general pipelines for conveying water, oil, air and the like and is made of malleable cast iron materials.
For the pipe joint in a threaded connection mode, a fixing mode of adding a gasket or double nuts is mostly adopted at present; in the fixing mode of the double nuts, after the two nuts are sequentially screwed in place, the nuts on the inner side need to be turned over by a certain angle, and then the two nuts are simultaneously screwed. This process can lead to the unloading of the inner nut and the difficulty in simultaneously threading both nuts.
Disclosure of Invention
In view of this, the present invention aims to provide a novel double-nut pipe joint, which has the characteristic of high connection stability.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a novel double-nut pipe joint comprises a joint body, a first nut, a second nut, a third nut and a fixed lantern ring; the first nut and the second nut have the same size parameters; the first nut and the second nut are sequentially connected to the joint body in a threaded manner; one end of the first nut, facing the second nut, is provided with an external thread section, and the third nut is in threaded connection with the external thread section; the length of the external thread section is the same as that of the third nut; the inner ring and the outer ring of the fixed lantern ring are both in a regular hexagon shape, the inner ring of the fixed lantern ring is matched with the outer rings of the first nut and the second nut, and the radius of an inscribed circle of the fixed lantern ring is larger than that of an circumscribed circle of the third nut; the side edges of the first nut, the second nut and the third nut are respectively provided with a first clamping groove, a second clamping groove and a third clamping groove, and the groove bottoms of the first clamping groove, the second clamping groove and the third clamping groove are flush and have the same width; and clamping blocks are arranged on the fixed lantern ring corresponding to the first clamping groove, the second clamping groove and the third clamping groove.
Preferably, the side edge of the fixed lantern ring is radially provided with a mounting groove in a penetrating manner; an installation plate is fixedly arranged in the installation groove, an adjusting bolt is vertically connected to the installation plate through threads, and a T-shaped connecting part is formed at the end part of the adjusting bolt; the fixture block is movably arranged in the mounting groove, and a T-shaped groove matched with the T-shaped connecting portion is formed in the top of the fixture block.
Preferably, the bottom end of the fixture block is arranged in a wedge shape to form a transition inclined plane.
Preferably, the side wall of the fixture block is provided with a telescopic ejector block; and the fixture block is also provided with a driving assembly for driving the ejector block to move.
Preferably, a first accommodating groove is formed in the fixture block, and a threaded hole communicated with the T-shaped groove is formed in the top of the first accommodating groove; one side of the fixture block is provided with a second accommodating groove communicated with the first accommodating groove, and the other side of the fixture block is provided with a third accommodating groove communicated with the first accommodating groove; the top block is movably arranged in the second accommodating groove; one side of the top block is fixedly provided with a movable rod, and one end of the movable rod extends into the second accommodating groove and is provided with a clamping seat; a first spring is sleeved on the rod body of the movable rod positioned in the second accommodating groove, one end of the first spring is abutted against the clamping seat, and the other end of the first spring is abutted against the side wall of the second accommodating groove; the driving assembly comprises a rotating rod, and the rotating rod sequentially penetrates through the mounting plate and the T-shaped groove, then extends into the first accommodating groove and is in threaded connection with the threaded hole; the bottom of dwang is provided with the gear, the side of movable rod is provided with the rack with gear engagement.
Preferably, the surface of the transition inclined plane and the outer side surface of the top block are both provided with rubber layers.
Preferably, the top block is close to one side of the fixture block facing the third nut.
Preferably, a fourth accommodating groove is formed in the fixture block, and a threaded hole communicated with the T-shaped groove is formed in the top of the fourth accommodating groove; one side of the fixture block is provided with a fifth accommodating groove communicated with the fourth accommodating groove; the top block is movably arranged in the fifth accommodating groove; one side of the top block facing the fourth accommodating groove is in a wedge shape, and a guide inclined plane is formed; a sixth accommodating groove communicated with the fifth accommodating groove is further formed in the clamping block and above the fifth accommodating groove; a top plate extending into the sixth accommodating groove is arranged on one side, facing the sixth accommodating groove, of the top block; a second spring is arranged in the sixth accommodating groove, one end of the second spring is abutted against the top plate, and the other end of the second spring is abutted against the side wall of the sixth accommodating groove; in a natural state, the top plate is pushed towards the fourth accommodating groove by the second spring; the driving assembly comprises a rotating rod, and the rotating rod sequentially penetrates through the mounting plate and the T-shaped groove, then extends into the fourth accommodating groove and is in threaded connection with the threaded hole; the bottom of dwang is provided with the briquetting, the briquetting with the direction inclined plane is contradicted.
The technical effects of the invention are mainly reflected in the following aspects: 1. the inner nut can be pressed against the outer nut without unloading the inner nut; 2. the nuts on the inner side and the outer side simultaneously form larger pressure on the screw threads, so that the looseness can be well prevented.
Drawings
FIG. 1 is an exploded view of the novel double nut coupling of the embodiment;
FIG. 2 is a schematic view illustrating the mounting of the fixture block in the embodiment;
FIG. 3 is an enlarged view of portion A of FIG. 2;
FIG. 4 is a schematic illustration of a first condition of the novel double nut coupling of the embodiment;
FIG. 5 is a schematic illustration of a second state of the novel double nut coupling of the embodiment;
FIG. 6 is a schematic diagram of a third state of the novel double nut coupling of the embodiment;
FIG. 7 is a schematic view showing an installation of one example of a driving assembly in the embodiment;
FIG. 8 is an enlarged view of portion B of FIG. 7;
FIG. 9 is an overall view of the fixture block in the embodiment;
fig. 10 is a schematic view showing the mounting of another example of the driving assembly in the embodiment;
fig. 11 is an enlarged view of a portion C in fig. 10.
Reference numerals: 1. a connector body; 2. a first nut; 21. a first card slot; 22. an external threaded section; 3. a third nut; 31. a third card slot; 4. a second nut; 41. a second card slot; 5. a fixed collar; 51. mounting grooves; 61. a clamping block; 611. a T-shaped slot; 6111. a threaded hole; 612. a second accommodating groove; 6121. a receiving cavity; 613. a first accommodating groove; 614. a third accommodating groove; 615. a transition bevel; 616. a fourth accommodating groove; 617. a fifth accommodating groove; 618. a sixth accommodating groove; 62. adjusting the bolt; 621. a T-shaped connecting portion; 63. mounting a plate; 71. rotating the rod; 711. briquetting; 72. a top block; 721. a guide slope; 722. a top plate; 73. a movable rod; 74. a card holder; 75. a first spring; 76. a second spring.
Detailed Description
The following detailed description of the embodiments of the present invention is provided in order to make the technical solution of the present invention easier to understand and understand.
Referring to fig. 1, the present embodiment provides a novel double nut pipe joint, which includes a joint body 1, a first nut 2, a second nut 4, a third nut 3, and a fixing collar 5. The first nut 2 and the second nut 4 have the same size parameters; the first nut 2 and the second nut 4 are sequentially connected to the joint body 1 in a threaded manner; one end of the first nut 2 facing the second nut 4 is provided with an external thread section 22, and the third nut 3 is connected to the external thread section 22 in a threaded mode; the length of the external threaded section 22 is the same as the length of the third nut 3.
The inner ring and the outer ring of the fixed lantern ring 5 are both regular hexagons, the inner ring of the fixed lantern ring 5 is matched with the outer rings of the first nut 2 and the second nut 4, and the radius of the inscribed circle of the fixed lantern ring 5 is larger than that of the circumscribed circle of the third nut 3.
With reference to fig. 1 to 3, the first clamping groove 21, the second clamping groove 41 and the third clamping groove 31 are respectively formed on the side edges of the first nut 2, the second nut 4 and the third nut 3, and the groove bottoms of the first clamping groove 21, the second clamping groove 41 and the third clamping groove 31 are flush and have the same width. The fixing ring 5 is provided with a latch 61 at a position corresponding to the first, second and third latch grooves 21, 41 and 31. Meanwhile, the side edge of the fixed lantern ring 5 is provided with a mounting groove 51 in a penetrating way along the radial direction; an installation plate 63 is fixedly arranged in the installation groove 51, an adjusting bolt 62 is vertically screwed on the installation plate 63, and a T-shaped connection part 621 is formed at the end part of the adjusting bolt 62; the latch 61 is movably disposed in the mounting groove 51, and a T-shaped groove 611 adapted to the T-shaped connecting portion 621 is disposed at the top of the latch 61. Therefore, when the adjusting bolt 62 is rotated, the displacement of the latch 61 in the mounting groove 51 can be achieved. In addition, the bottom end of the latch 61 is wedge-shaped, and a transition inclined surface 615 is formed, so that when the latch 61 is lifted, the width adjustment of the latch 61 can be realized.
When the nut is installed, the third nut 3 is screwed on the external thread section 22 of the first nut 2, and the third clamping groove 31 is aligned with the first clamping groove 21; then, the second nut 4 is tightly attached to the external thread section 22, and the second card slot 41 is aligned with the first card slot 21 and the third card slot 31 at the same time; then, the fixing lantern ring 5 is sleeved from the second nut 4, and the first nut 2, the second nut 4 and the third nut 3 are covered at the same time; at this time, the first nut 2, the second nut 4, the third nut 3, and the fixing collar 5 are integrally combined. The combined components are then screwed onto the fitting body 1 until the first nut 2 has reached the appropriate position, which is the first state with reference to fig. 4. Then, the fixing collar 5 is slid onto the first nut 2 to be separated from the third nut 3, the third nut 3 is reversely screwed by a certain angle, referring to fig. 5, and the fixing collar is in a second state, that is, the third slot 31 has a certain included angle with the first slot 21 and the second slot 41, and then the overlapping portion of the third slot 31 with the first slot 21 and the second slot 41 forms the width of the current actual slot. Then, the adjusting bolt 62 is rotated to lift the fixture block 61 upwards until the effective width of the part of the fixture block 61 extending out of the mounting groove 51 is the same as the width of the actual card slot on the premise of not departing from the third card slot 31; a portion of the fixing collar 5 is then slid onto the third nut 3, in this case in a third state, see fig. 6. Referring to fig. 7 and 8, at this time, the transition inclined surface 615 on the latch 61 abuts against the right side of the third slot 31, and a certain gap still exists on the left side; to compensate for this gap, a retractable top piece 72 is provided on the side wall of the latch 61, and the top piece 72 is close to the side of the latch 61 facing the third nut 3. The fixture block 61 is further provided with a driving assembly for driving the top block 72 to move. Promote kicking block 72 to the left side through this drive assembly to contradict with the left side of third draw-in groove 31, whole fixture block 61 homoenergetic this moment can contradict with the lateral wall of first draw-in groove 21, second draw-in groove 41, and then first nut 2 and third nut 3 can't take place relative rotation, and then guaranteed synchronism between them.
In this embodiment, two driving methods of the top block 72 are exemplified, and will be described separately below.
In a first way,
Referring to fig. 7 to 9, a first receiving groove 613 is formed in the fixture block 61, and a threaded hole communicating with the T-shaped groove 611 is formed at the top of the first receiving groove 613; one side of the latch 61 is opened with a second receiving groove 612 communicated with the first receiving groove 613, and the other side is opened with a third receiving groove 614 communicated with the first receiving groove 613; the top block 72 is movably disposed in the second receiving groove 612; one side of the top block 72 is fixedly provided with a movable rod 73, and one end of the movable rod 73 extends into the second accommodating groove 612 and is provided with a clamping seat 74; a spring is sleeved on the rod body of the movable rod 73 positioned in the second accommodating groove 612, one end of the spring is abutted against the clamping seat 74, and the other end of the spring is abutted against the side wall of the second accommodating groove 612; the driving assembly comprises a rotating rod 71, and the rotating rod 71 sequentially penetrates through the mounting plate 63 and the T-shaped groove 611, then extends into the first accommodating groove 613, and is in threaded connection with the threaded hole; the bottom end of the rotating rod 71 is provided with a gear, and the side surface of the movable rod 73 is provided with a rack meshed with the gear. The top of the rotating rod 71 can be provided with a cross groove, a hexagonal groove or a straight groove, and the top block 72 can be driven to displace through a gear by rotating the rotating rod 71.
The surface of the transition inclined plane 615 and the outer side surface of the top block 72 are both provided with rubber layers, and certain damage can be avoided by the arrangement of the rubber layers.
The second way,
With reference to fig. 9-11, a fourth receiving groove 616 is formed in the fixture block 61, and a threaded hole 6111 communicating with the T-shaped groove 611 is formed at the top of the fourth receiving groove 616; one side of the latch 61 is provided with a fifth receiving groove 617 communicated with the fourth receiving groove 616; the top block 72 is movably disposed in the fifth accommodating groove 617; the top block 72 is wedge-shaped toward one side of the fourth receiving groove 616 and forms a guide slope 721; a sixth accommodating groove 618 communicated with the fifth accommodating groove 617 is further arranged in the latch 61 and above the fifth accommodating groove 617; a top plate 722 extending into the sixth receiving groove 618 is arranged on one side of the top block 72 facing the sixth receiving groove 618; a second spring 76 is disposed in the sixth receiving groove 618, one end of the second spring 76 abuts against the top plate 722, and the other end abuts against the side wall of the sixth receiving groove 618; in a natural state, the second spring 76 pushes the top plate 722 toward the fourth receiving groove 616; the driving assembly comprises a rotating rod 71, and the rotating rod 71 sequentially penetrates through the mounting plate 63 and the T-shaped groove 611, then extends into the fourth accommodating groove 616, and is in threaded connection with the threaded hole 6111; the bottom end of the rotating lever 71 is provided with a pressing block 711, and the pressing block 711 abuts against the guide inclined surface 721. The top of the rotating rod 71 can be provided with a cross groove, a hexagonal groove or a straight groove, and the downward movement of the pressing block 711 can be realized by rotating the rotating rod 71, and the pressing block is matched with the guide inclined surface 721 to realize the displacement of the ejecting block 72.
The above are only typical examples of the present invention, and besides, the present invention may have other embodiments, and all the technical solutions formed by equivalent substitutions or equivalent changes are within the scope of the present invention as claimed.
Claims (5)
1. A novel double-nut pipe joint is characterized by comprising a joint body (1), a first nut (2), a second nut (4), a third nut (3) and a fixed lantern ring (5); the first nut (2) and the second nut (4) have the same size parameters; the first nut (2) and the second nut (4) are sequentially connected to the joint body (1) in a threaded manner; an external thread section (22) is arranged at one end, facing the second nut (4), of the first nut (2), and the third nut (3) is connected to the external thread section (22) in a threaded mode; the length of the external thread section (22) is the same as that of the third nut (3); the inner ring and the outer ring of the fixed lantern ring (5) are both regular hexagons, the inner ring of the fixed lantern ring (5) is matched with the outer rings of the first nut (2) and the second nut (4), and the radius of an inscribed circle of the fixed lantern ring (5) is larger than that of an circumscribed circle of the third nut (3); the side edges of the first nut (2), the second nut (4) and the third nut (3) are respectively provided with a first clamping groove (21), a second clamping groove (41) and a third clamping groove (31), and the groove bottoms of the first clamping groove (21), the second clamping groove (41) and the third clamping groove (31) are flush and have the same width; clamping blocks (61) are arranged on the fixed lantern ring (5) at positions corresponding to the first clamping groove (21), the second clamping groove (41) and the third clamping groove (31);
the side edge of the fixed lantern ring (5) is radially provided with a mounting groove (51) in a penetrating manner; an installation plate (63) is fixedly arranged in the installation groove (51), an adjusting bolt (62) is vertically connected to the installation plate (63) in a threaded manner, and a T-shaped connection part (621) is formed at the end part of the adjusting bolt (62); the fixture block (61) is movably arranged in the mounting groove (51), and a T-shaped groove (611) matched with the T-shaped connecting part (621) is formed in the top of the fixture block (61); the bottom end of the fixture block (61) is arranged in a wedge shape to form a transition inclined plane (615);
a telescopic ejector block (72) is arranged on the side wall of the fixture block (61); the fixture block (61) is further provided with a driving assembly for driving the ejector block (72) to move.
2. The novel double-nut pipe joint according to claim 1, wherein a first accommodating groove (613) is formed in the fixture block (61), and a threaded hole communicated with the T-shaped groove (611) is formed in the top of the first accommodating groove (613); one side of the fixture block (61) is provided with a second accommodating groove (612) communicated with the first accommodating groove (613), and the other side of the fixture block is provided with a third accommodating groove (614) communicated with the first accommodating groove (613); the top block (72) is movably arranged in the second accommodating groove (612); a movable rod (73) is fixedly arranged on one side of the top block (72), one end of the movable rod (73) extends into the second accommodating groove (612) and is provided with a clamping seat (74); a first spring (75) is sleeved on the rod body of the movable rod (73) positioned in the second accommodating groove (612), one end of the first spring (75) is abutted against the clamping seat (74), and the other end of the first spring is abutted against the side wall of the second accommodating groove (612); the driving assembly comprises a rotating rod (71), and the rotating rod (71) sequentially penetrates through the mounting plate (63) and the T-shaped groove (611), then extends into the first accommodating groove (613), and is in threaded connection with the threaded hole; the bottom of dwang (71) is provided with the gear, the side of movable rod (73) is provided with the rack with gear engagement.
3. The novel double nut pipe joint according to claim 2, wherein the surface of the transition bevel (615) and the outer side surface of the top block (72) are provided with rubber layers.
4. The new double nut pipe joint according to claim 3, wherein said top block (72) is close to the side of said latch (61) facing the third nut (3).
5. The novel double-nut pipe joint according to claim 1, wherein a fourth accommodating groove (616) is formed in the fixture block (61), and a threaded hole (6111) communicated with the T-shaped groove (611) is formed in the top of the fourth accommodating groove (616); one side of the fixture block (61) is provided with a fifth accommodating groove (617) communicated with the fourth accommodating groove (616); the top block (72) is movably arranged in the fifth accommodating groove (617); one side of the top block (72) facing the fourth accommodating groove (616) is arranged in a wedge shape, and a guide inclined surface (721) is formed; a sixth accommodating groove (618) communicated with the fifth accommodating groove (617) is further formed in the fixture block (61) and above the fifth accommodating groove (617); one side, facing the sixth accommodating groove (618), of the top block (72) is provided with a top plate (722) extending into the sixth accommodating groove (618); a second spring (76) is arranged in the sixth accommodating groove (618), one end of the spring is abutted against the top plate (722), and the other end of the spring is abutted against the side wall of the sixth accommodating groove (618); in a natural state, the second spring (76) pushes the top plate (722) toward the fourth receiving groove (616); the driving assembly comprises a rotating rod (71), and the rotating rod (71) sequentially penetrates through the mounting plate (63) and the T-shaped groove (611), then extends into the fourth accommodating groove (616), and is in threaded connection with the threaded hole (6111); the bottom of dwang (71) is provided with briquetting (711), briquetting (711) with direction inclined plane (721) are contradicted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011304458.8A CN112325008B (en) | 2020-11-19 | 2020-11-19 | Novel double-nut pipe joint |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011304458.8A CN112325008B (en) | 2020-11-19 | 2020-11-19 | Novel double-nut pipe joint |
Publications (2)
| Publication Number | Publication Date |
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| CN112325008A CN112325008A (en) | 2021-02-05 |
| CN112325008B true CN112325008B (en) | 2022-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011304458.8A Active CN112325008B (en) | 2020-11-19 | 2020-11-19 | Novel double-nut pipe joint |
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| Country | Link |
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| CN (1) | CN112325008B (en) |
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| CH541087A (en) * | 1970-06-01 | 1973-08-31 | Skf Ind Trading & Dev | Screw and nut device, with clearance adjustment |
| JPS6445589A (en) * | 1987-08-14 | 1989-02-20 | Matsushima Kogyo Kk | Chuck |
| JP2016125622A (en) * | 2015-01-07 | 2016-07-11 | ハードロック工業株式会社 | Special double hard-lock nuts |
| CN107269665A (en) * | 2017-08-08 | 2017-10-20 | 张亚宁 | Super fastening kit |
| CN107678230A (en) * | 2017-11-17 | 2018-02-09 | 深圳市中科创想科技有限责任公司 | A kind of installation by adhering safety monitoring equipment |
| CN107845516A (en) * | 2017-12-26 | 2018-03-27 | 安徽开诚电器有限公司 | A kind of auto-manual intelligent double-control switch |
| CN109461367A (en) * | 2018-12-20 | 2019-03-12 | 安徽择正公路工程有限责任公司 | Quick detachable label and its mounting process |
| CN209333382U (en) * | 2018-12-26 | 2019-09-03 | 青海汉尧农副产品有限责任公司 | A kind of cloth-bag type pulse dust collector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5466014A (en) * | 1994-10-21 | 1995-11-14 | Cummings; Dave | Clamp for line fitting |
| CN2585003Y (en) * | 2002-11-19 | 2003-11-05 | 河南上蝶阀门股份有限公司 | Limit expansion joint |
| JP6077168B1 (en) * | 2016-08-25 | 2017-02-08 | 邦義 井石 | Fastening member |
| CN107489683A (en) * | 2017-09-19 | 2017-12-19 | 芜湖铁路桥梁制造有限公司 | Rail fixing bolt |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH541087A (en) * | 1970-06-01 | 1973-08-31 | Skf Ind Trading & Dev | Screw and nut device, with clearance adjustment |
| JPS6445589A (en) * | 1987-08-14 | 1989-02-20 | Matsushima Kogyo Kk | Chuck |
| JP2016125622A (en) * | 2015-01-07 | 2016-07-11 | ハードロック工業株式会社 | Special double hard-lock nuts |
| CN107269665A (en) * | 2017-08-08 | 2017-10-20 | 张亚宁 | Super fastening kit |
| CN107678230A (en) * | 2017-11-17 | 2018-02-09 | 深圳市中科创想科技有限责任公司 | A kind of installation by adhering safety monitoring equipment |
| CN107845516A (en) * | 2017-12-26 | 2018-03-27 | 安徽开诚电器有限公司 | A kind of auto-manual intelligent double-control switch |
| CN109461367A (en) * | 2018-12-20 | 2019-03-12 | 安徽择正公路工程有限责任公司 | Quick detachable label and its mounting process |
| CN209333382U (en) * | 2018-12-26 | 2019-09-03 | 青海汉尧农副产品有限责任公司 | A kind of cloth-bag type pulse dust collector |
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| CN112325008A (en) | 2021-02-05 |
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