Self-sealing self-drilling screw for waterproof fastening of photovoltaic roof

Abstract

The utility model provides a self-sealing self-drilling screw for waterproof fastening of a photovoltaic roof, and belongs to the technical field of screws. The self-sealing self-drilling screw for waterproof fastening of the photovoltaic roof comprises a self-tapping drill bit which is tapped into a photovoltaic roof structure. The top of the threaded section is integrally connected with the sealing column, the outer wall of the sealing column is provided with the external thread type sealing strip, and the external thread type sealing strip is matched with the main thread in shape, so that when the self-tapping drill bit drills a hole, the threaded section is tapped into a roof structure, and the external thread type sealing strip can be screwed into a drilled thread groove; the self drilling screw is arranged between the main threads to improve the sealing performance between the self drilling screw and a roof structure, meanwhile, the auxiliary threads are arranged between the main threads, the sealing column is provided with the internal thread type sealing strip, and the internal thread type sealing strip is matched with the auxiliary threads in shape, so that the internal thread type sealing strip can be screwed into the thread groove, and the sealing effect is further improved; and the drawing strength of the self drilling screw can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of screws, in particular to a self-sealing drill tail screw for waterproof fastening of photovoltaic roof. BACKGROUND

[0002] Photovoltaic panels are assembled on photovoltaic roof, and photovoltaic panel supports are fixed on the roof structure through self-tapping screws. Drill tail screws are widely used in the connection of metal, wood and composite materials due to their self-tapping hole characteristics. However, when the traditional drill tail screw is used in a humid environment or liquid medium, the liquid is easy to penetrate into the connection part through the thread gap, resulting in corrosion or connection failure. In the prior art, a surface coating is often used to improve the sealing performance, but the coating is easy to be damaged during the screw installation process, thereby affecting the sealing performance. Therefore, the present application provides a self-sealing drill tail screw for waterproof fastening of photovoltaic roof. CONTENT OF THE UTILITY MODEL

[0003] In order to make up for the above shortcomings, the present application provides a self-sealing drill tail screw for waterproof fastening of photovoltaic roof, which aims to improve the low sealing performance of the existing drill tail screw.

[0004] The present application provides a self-sealing drill tail screw for waterproof fastening of photovoltaic roof, which comprises a self-tapping drill bit that penetrates into the photovoltaic roof structure. The top of the self-tapping drill bit is integrally connected with a threaded segment, the top of the threaded segment is integrally connected with a sealing column, the outer wall of the sealing column is provided with an external thread type sealing strip, and the top of the sealing column is integrally connected with a sealing head.

[0005] In a specific embodiment, a cutting groove is formed on the self-tapping drill bit, and the cutting groove extends to the threaded segment.

[0006] In a specific embodiment, the threaded segment comprises a connecting column, which is integrally connected with the self-tapping drill bit and the sealing column. The connecting column is provided with a main thread, and the pitch of the external thread type sealing strip is the same as the pitch of the main thread.

[0007] In a specific embodiment, the connecting column is provided with a secondary thread, and the secondary thread is located between the main threads.

[0008] In a specific embodiment, the sealing column is further provided with an internal thread type sealing strip, and the pitch of the internal thread type sealing strip is the same as the pitch of the secondary thread.

[0009] In a specific embodiment, an annular groove is formed at the bottom of the sealing head, and an annular sealing ring is inserted into the annular groove.

[0010] In a specific embodiment, the sealing head top is provided with a plum blossom groove, and a drainage groove is formed in the side wall of the plum blossom groove, and the bottom of the drainage groove is flush with the bottom of the plum blossom groove.

[0011] In a specific embodiment, the outer thread type sealing strip is elastically arranged, and a thread type cavity is formed in the outer thread type sealing strip.

[0012] The beneficial effects of the present application are as follows: by integrally connecting a sealing column on the top of the thread segment, and mounting an outer thread type sealing strip on the outer wall of the sealing column, the outer thread type sealing strip is matched with the shape of the main thread, so that when the self-tapping drill bit drills a hole, the thread segment is tapped into the roof structure, and then the outer thread type sealing strip can be screwed into the threaded groove drilled, to improve the sealing between the drill tail screw and the roof structure, and at the same time, a secondary thread is arranged between the main thread, an inner thread type sealing strip is mounted on the sealing column, the inner thread type sealing strip is matched with the shape of the secondary thread, so that the inner thread type sealing strip can also be screwed into the threaded groove, to further improve the sealing effect, and at the same time, the main thread and the secondary thread are arranged, to improve the pull-out strength of the drill tail screw. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor.

[0014] Figure 1 is a schematic diagram of the main structure of the self-sealing drill tail screw for waterproof fastening of photovoltaic roof provided by the embodiments of the present application;

[0015] Figure 2 is a schematic diagram of the front structure of the self-sealing drill tail screw for waterproof fastening of photovoltaic roof provided by the embodiments of the present application;

[0016] Figure 3 is a schematic diagram of the front sectional structure of the self-sealing drill tail screw for waterproof fastening of photovoltaic roof provided by the embodiments of the present application;

[0017] Figure 4 is Figure 3 is a local enlarged view of A in FIG. 4;

[0018] Figure 5 is Figure 3 is a local enlarged view of B in FIG. 4.

[0019] In the figure: 10 - self-tapping drill; 110 - cutting groove; 20 - threaded section; 210 - connecting column; 220 - main thread; 230 - secondary thread; 30 - sealing column; 310 - internally threaded sealing strip; 40 - externally threaded sealing strip; 410 - threaded cavity; 50 - sealing head; 510 - annular groove; 520 - annular sealing ring; 530 - keyway; 540 - drainage groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application.

[0021] Please refer to Figures 1-5 The present application provides a self-sealing drill tail screw for waterproof fastening of photovoltaic roof, which comprises a self-tapping drill 10 penetrating into the photovoltaic roof structure, the top of the self-tapping drill 10 is integrally connected with a threaded section 20, the top of the threaded section 20 is integrally connected with a sealing column 30, the outer wall of the sealing column 30 is provided with an externally threaded sealing strip 40, and the top of the sealing column 30 is integrally connected with a sealing head 50. Specifically, after installing the support of the photovoltaic panel on the roof structure, the sealing head 50 is rotated by the drilling equipment, and the sealing head 50 drives the self-tapping drill 10 to rotate through the sealing column 30 and the threaded section 20, so that the self-tapping drill 10 penetrates into the roof structure through the photovoltaic support, the externally threaded sealing strip 40 is adapted to the threaded section 20, and after the threaded section 20 drills a threaded groove on the roof structure, the externally threaded sealing strip 40 can be screwed into the threaded groove, and the externally threaded sealing strip 40 is in close contact with the threaded groove to improve the sealing effect.

[0022] Please refer to Figure 2 The self-tapping drill 10 is provided with a cutting groove 110 extending to the threaded section 20, which cuts the top of the roof structure when installed, so that the self-tapping drill 10 can enter the roof structure. Further, the threaded section 20 comprises a connecting column 210 integrally connected with the self-tapping drill 10 and the sealing column 30, the connecting column 210 is provided with a main thread 220, the pitch of the externally threaded sealing strip 40 is the same as that of the main thread 220, the bottom of the main thread 220 is provided with a notch, and the bottom of the secondary thread 230 is also provided with a notch, so that the main thread 220 penetrates into the roof structure, the externally threaded sealing strip 40 is adapted to the main thread 220, the externally threaded sealing strip 40 can be screwed into the threaded groove, and the distance between the externally threaded sealing strip 40 and the main thread 220 is an integer multiple of the pitch, so that when the externally threaded sealing strip 40 is screwed in, it can correspond to the top inlet of the threaded groove, thereby making the externally threaded sealing strip 40 screwed into the threaded groove.

[0023] Please refer to Figure 2, the secondary thread 230 is located between the primary threads 220, the sealing column 30 is also provided with an internal thread type sealing strip 310, the pitch of the internal thread type sealing strip 310 is same with the pitch of the secondary thread 230, in the specific setting, the internal thread type sealing strip 310 is matched with the secondary thread 230, and the secondary thread 230 is provided with another thread groove on the inner wall of the thread groove, and the internal thread type sealing strip 310 is screwed into the thread groove, so that the sealing effect is improved, and the drawing degree between the drill screw and the roof structure is improved, and the photovoltaic support is prevented from shaking.

[0024] Referring to Figure 1 and 2 , the bottom of the sealing head 50 is provided with an annular groove 510, the annular groove 510 is inserted with an annular sealing ring 520, the top of the sealing head 50 is provided with a quincunx groove 530, the sidewall of the quincunx groove 530 is provided with a drainage groove 540, the bottom of the drainage groove 540 is flush with the bottom of the quincunx groove 530, specifically, the quincunx groove 530 is matched with the drill bit of the drilling machine, so that the drilling machine can drive the sealing head 50 to rotate, and the annular sealing ring 520 is installed at the bottom of the sealing head 50, so as to further improve the sealing effect, and after the rainwater enters the quincunx groove 530, it can be discharged through the drainage groove 540 on the sidewall of the quincunx groove 530, thereby avoiding the accumulation of water in the quincunx groove 530 and preventing the rusting rate of the sealing head 50 from being accelerated.

[0025] Referring to Figure 5 , the external thread type sealing strip 40 is elastically arranged, and the external thread type sealing strip 40 is provided with a thread type cavity 410, it should be noted that the internal thread type sealing strip 310 is also elastically arranged, so that the external thread type sealing strip 40 and the internal thread type sealing strip 310 can be in close contact with the thread groove, so as to improve the sealing effect.

[0026] When the self-sealing drill screw for waterproof fastening of photovoltaic roof is used: the photovoltaic support is placed on the roof structure, then the self-tapping drill bit 10 is inserted through the mounting hole on the photovoltaic support, the drill bit of the drilling machine is inserted into the quincunx groove 530, the drilling machine is started, the sealing head 50 is driven to rotate, the sealing head 50 drives the self-tapping drill bit 10 to rotate through the sealing column 30 and the connecting column 210, so that the self-tapping drill bit 10 is tapped into the roof structure, further, the threaded section 20 is tapped into the roof structure to form a thread groove in the roof structure, so that the external thread type sealing strip 40 and the internal thread type sealing strip 310 can be screwed into the thread groove, until the sealing head 50 is pressed on the photovoltaic support and the rotation is stopped, the external thread type sealing strip 40 and the internal thread type sealing strip 310 fill the thread groove, so as to improve the sealing effect, and the installation of the drill screw is completed.

[0027] It should be noted that the specific model and specification of the self-tapping drill bit 10 need to be determined according to the actual specification of the device, and the specific selection calculation method adopts the existing technology in the art, so it will not be described in detail.

[0028] The above only describes the embodiments of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, the present application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

Claims

1. A self-sealing lag bolt for photovoltaic roofing waterproofing fastening, characterized by, The utility model provides self -drilling tap (10) including attack into photovoltaic roof structure, the top of self -drilling tap (10) is integrally connected with threaded section (20), the top of threaded section (20) is integrally connected with sealing post (30), the outer wall of sealing post (30) is provided with outer thread type sealing strip (40), the top of sealing post (30) is integrally connected with sealing head (50).

2. A self-sealing lag screw for photovoltaic roofing waterproofing fastening according to claim 1, characterized in that, The self -drilling tap (10) is provided with a cutting groove (110), and the cutting groove (110) extends to the threaded section (20).

3. A self-sealing lag screw for photovoltaic roofing waterproofing fastening according to claim 1, characterized in that, The threaded section (20) comprises a connecting column (210) integrally connected with the self -drilling tap (10) and the sealing post (30), and the connecting column (210) is provided with a main thread (220).

4. A self-sealing lag screw for photovoltaic roofing waterproofing fastening according to claim 3, characterized in that, The connecting column (210) is provided with a secondary thread (230) between the main thread (220).

5. A self-sealing lag screw for photovoltaic roofing waterproofing fastening according to claim 4, characterized in that, The sealing post (30) is further provided with an inner thread type sealing strip (310), and the pitch of the inner thread type sealing strip (310) is the same as that of the secondary thread (230).

6. A self-sealing lag screw for photovoltaic roofing waterproofing fastening according to claim 1, characterized in that, The bottom of the sealing head (50) is provided with an annular groove (510), and the annular groove (510) is inserted with an annular sealing ring (520).

7. A self-sealing lag screw for photovoltaic roofing waterproofing fastening according to claim 6, characterized in that, The top of the sealing head (50) is provided with a keyway (530), and the sidewall of the keyway (530) is provided with a drainage groove (540) flush with the bottom of the keyway (530).

8. A self-sealing lag screw for photovoltaic roofing waterproofing fastening according to claim 1, characterized in that, The outer thread type sealing strip (40) is elastically arranged, and the outer thread type sealing strip (40) is provided with a threaded cavity (410).

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