Extension connecting bolt for solar photovoltaic support

Abstract

The utility model discloses an extension connecting bolt for a solar photovoltaic support, which comprises a bolt head, a screw rod, a first protective cover, a nut and a second protective cover, the screw rod is fixed at the bottom of the bolt head, the nut is screwed on the main screw rod, the top of the bolt head is provided with a first threaded hole, the first protective cover covers the bolt head, and the second protective cover covers the second threaded hole. A stud matched with the first threaded hole is arranged in the first protective cover and screwed on the first threaded hole, and a first water expansion sealing ring is fixed to the end, close to the nut, of the first protective cover. The first protective cover covers the bolt head, and the second protective cover covers the nut and the screw rod located on the same side of the nut with the connecting sleeve, so that the bolt can be isolated from the external environment, the bolt is located in a relatively independent space, the bolt is not prone to making contact with external rainwater, dust, insect and bird excrement and other substances, and the service life of the bolt is prolonged. And the service life of the bolt is prolonged, and the connection reliability of the bolt is improved.

Description

[Technical field]

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of bolts. [Background technology]

[0002] Solar photovoltaic brackets are special brackets designed for placing, installing and fixing solar panels in solar photovoltaic power generation systems. In order to maximize the power output of the entire photovoltaic power generation system, the solar panels are fixed in a certain direction, arrangement and spacing according to the geographical, climatic and solar energy resource conditions of the construction site. The supporting structure is usually a steel structure, an aluminum alloy structure, or a mixture of the two.

[0003] Solar photovoltaic brackets are often made of a combination of various special profiles. Sometimes, in order to extend the solar photovoltaic bracket, bolts and other components are needed. Since the solar photovoltaic bracket is set up in the open air, its use environment is relatively harsh. The bolts are easily corroded by external substances such as rain, dust, insects and bird feces. Once the corrosion reaches a certain level, the bolts are prone to failure, which will reduce the reliability of the solar photovoltaic bracket and bring safety hazards. [Contents of the utility model]

[0004] The purpose of the utility model is to solve the problems in the prior art and to provide an extended connecting bolt for a solar photovoltaic bracket, which can make the bolt less susceptible to corrosion and make the bolt safer and more reliable to use.

[0005] To achieve the above-mentioned purpose, the utility model proposes an extended connecting bolt for a solar photovoltaic bracket, including a bolt head, a screw rod, a first protective cover, a nut, and a second protective cover. A screw rod is fixed at the bottom of the bolt head, a nut is screwed on the main screw rod, a first threaded hole is provided at the top of the bolt head, the first protective cover covers the bolt head, a stud matched with the first threaded hole is provided inside the first protective cover, the stud is screwed on the first threaded hole, a first water-swelling sealing ring is fixed to the end of the first protective cover close to the nut, a connecting sleeve is fixed to the end of the nut away from the bolt head, an external thread is provided on the outer wall of the connecting sleeve, the second protective cover covers the nut and the screw rod located on the same side of the nut as the connecting sleeve, a second threaded hole matched with the connecting sleeve is provided inside the second protective cover, the connecting sleeve is screwed on the second threaded hole, and a second water-swelling sealing ring is fixed to the end of the second protective cover close to the bolt head.

[0006] Preferably, the threads on the stud, the external threads on the connecting sleeve, and the threads on the screw have the same rotation direction.

[0007] Preferably, flanges are provided at the end of the bolt head close to the nut and at the end of the nut close to the bolt head.

[0008] Preferably, a first annular embedding groove is provided near the nut end of the first protective cover, a first embedding ring matching the embedding groove is provided on the first water-swelling sealing ring, and the first embedding ring is embedded in the first embedding groove; a second annular embedding groove is provided near the bolt head end of the second protective cover, a second water-swelling sealing ring matching the embedding groove is provided on the second water-swelling sealing ring, and the second embedding ring is embedded in the second embedding groove.

[0009] The beneficial effects of the utility model are as follows: the utility model covers the bolt head with the first protective cover, and covers the nut and the screw rod on the same side of the nut as the connecting sleeve with the second protective cover, so that the bolt can be isolated from the external environment, and the bolt is placed in a relatively independent space. The bolt is not easily contacted with external rainwater, dust, insect and bird droppings and other substances, and the bolt is not easily corroded, thereby improving the service life and connection reliability of the bolt.

[0010] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0011] Figure 1 It is a front view of an extended connecting bolt for a solar photovoltaic support of the utility model.

[0012] In the figure: 1-bolt head, 2-first protective cover, 3-nut, 4-second protective cover, 10-first threaded hole, 15-screw, 16-flange, 20-stud, 21-first embedded groove, 25-first water-swelling sealing ring, 26-first embedded ring, 30-connecting sleeve, 40-second threaded hole, 41-second embedded groove, 45-second water-swelling sealing ring, 46-second embedded ring. [Specific implementation method]

[0013] Embodiment 1:

[0014] See also Figure 1The utility model extends the connecting bolt for the solar photovoltaic bracket, comprises a bolt head 1, a screw rod 15, a first protective cover 2, a nut 3, and a second protective cover 4. The bottom of the bolt head 1 is fixed with a screw rod 15, the bolt head 1 and the screw rod 15 are an integrated structure, a nut 3 is screwed on the main screw rod 15, a first threaded hole 10 is provided on the top of the bolt head 1, the first protective cover 2 covers the bolt head 1, a stud 20 matching the first threaded hole 10 is provided inside the first protective cover 2, the stud 20 is screwed on the first threaded hole 10, and the first protective cover 2 is provided with a bolt head 20. The stud 20 is screwed on the first threaded hole 10. A first water-swelling sealing ring 25 is fixed to the end of the cover 2 close to the nut 3, and a connecting sleeve 30 is fixed to the end of the nut 3 away from the bolt head 1. The nut 3 and the connecting sleeve 30 are an integral structure, and an external thread is provided on the outer wall of the connecting sleeve 30. The second protective cover 4 covers the nut 3 and the screw 15 located on the same side of the nut 3 as the connecting sleeve 30. A second threaded hole 40 matching the connecting sleeve 30 is provided inside the second protective cover 4. The connecting sleeve 30 is screwed on the second threaded hole 40, and a second water-swelling sealing ring 45 is fixed to the end of the second protective cover 4 close to the bolt head 1.

[0015] The threads on the stud 20 , the external threads on the connecting sleeve 30 , and the threads on the screw rod 15 rotate in the same direction.

[0016] Embodiment 2:

[0017] In order to improve the anti-loosening effect of the bolt, the end of the bolt head 1 close to the nut 3 and the end of the nut 3 close to the bolt head 1 are both provided with flanges 16, and the bolt head 1 and the flange 16, the nut 3 and the flange 16 are an integrated structure.

[0018] Embodiment three:

[0019] In order to prevent the first water-swelling sealing ring 25 and the second water-swelling sealing ring 26 from falling off easily, an annular first embedding groove 21 is provided at the end of the first protective cover 2 close to the nut 3, and a first embedding ring 26 matching the embedding groove is provided on the first water-swelling sealing ring 25, and the first embedding ring 26 is embedded in the first embedding groove 21; an annular second embedding groove 41 is provided at the end of the second protective cover 4 close to the bolt head 1, and a second embedding ring 46 matching the embedding groove is provided on the second water-swelling sealing ring 45, and the second embedding ring 46 is embedded in the second embedding groove 41.

[0020] Working process of this utility model:

[0021] During the operation of the extended connection bolt for the solar photovoltaic bracket of the utility model, after the bolt body composed of the bolt head 1 and the screw rod 15 and the nut 3 are installed, the first protective cover 2 is screwed on the bolt head 1 until the first protective cover 2 completely covers the bolt head 1, and the second protective cover 4 is screwed on the connecting sleeve 30 until the second protective cover 4 completely covers the nut 2. At this time, the bolt body and the nut 3 can be isolated from the external environment, so that the bolt body and the nut 3 are in a relatively independent space, and the bolt body and the nut 3 are not easy to contact with rainwater, dust, insect and bird feces and other substances in the outside world, and the bolt body and the nut 3 are not easy to be corroded, thereby improving the service life of the bolt and the connection reliability.

[0022] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. Extended connecting bolts for solar photovoltaic brackets, characterized by: The invention comprises a bolt head (1), a screw rod (15), a first protective cover (2), a nut (3), and a second protective cover (4); a screw rod (15) is fixed to the bottom of the bolt head (1); a nut (3) is screwed onto the main screw rod (15); a first threaded hole (10) is provided at the top of the bolt head (1); the first protective cover (2) covers the bolt head (1); a stud (20) matching the first threaded hole (10) is provided inside the first protective cover (2); the stud (20) is screwed onto the first threaded hole (10); the end of the first protective cover (2) close to the nut (3) is A first water-swelling sealing ring (25) is fixed thereto; a connecting sleeve (30) is fixed to the end of the nut (3) away from the bolt head (1); an external thread is provided on the outer wall of the connecting sleeve (30); a second protective cover (4) covers the nut (3) and a screw rod (15) located on the same side of the nut (3) as the connecting sleeve (30); a second threaded hole (40) matching the connecting sleeve (30) is provided inside the second protective cover (4); the connecting sleeve (30) is screwed onto the second threaded hole (40); and a second water-swelling sealing ring (45) is fixed to the end of the second protective cover (4) close to the bolt head (1).

2. The extended connecting bolt for solar photovoltaic support according to claim 1, characterized in that: The threads on the stud (20), the external threads on the connecting sleeve (30), and the threads on the screw rod (15) rotate in the same direction.

3. The extended connecting bolt for solar photovoltaic support according to claim 1, characterized in that: The end of the bolt head (1) close to the nut (3) and the end of the nut (3) close to the bolt head (1) are both provided with flanges (16).

4. The extended connecting bolt for solar photovoltaic support according to claim 1, characterized in that: The first protective cover (2) is provided with an annular first embedding groove (21) at the end close to the nut (3), the first water-expandable sealing ring (25) is provided with a first embedding ring (26) matching with the embedding groove, and the first embedding ring (26) is embedded in the first embedding groove (21), and the second protective cover (4) is provided with an annular second embedding groove (41) at the end close to the bolt head (1), the second water-expandable sealing ring (45) is provided with a second embedding ring (46) matching with the embedding groove, and the second embedding ring (46) is embedded in the second embedding groove (41).

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