A retractable confined space air duct flange fastening device

Abstract

A telescopic confined space air duct flange fastening device comprises a telescopic mother rod; a telescopic sub-rod is slidably provided in the telescopic mother rod; clamping pieces are symmetrically rotatably provided on both sides of the telescopic sub-rod away from one end of the telescopic mother rod; a stretching mother rod is slidably provided on one side of the telescopic mother rod; a stretching sub-rod is slidably provided in the stretching mother rod; a mounting groove is provided on the upper side of the telescopic sub-rod near the clamping piece; a connecting shaft is slidably provided in the mounting groove on the stretching sub-rod; connecting pieces are rotatably provided on both sides of the connecting shaft and are rotatably connected to the opposite clamping pieces; two clamping pieces are provided with rotating shafts relative to each other; sleeves are provided on the two rotating shafts in a relatively pluggable manner. The present invention can adjust the length of the entire device and is suitable for the installation of air duct flanges of different specifications; the driving shaft drives the rotating shaft sleeve in the clamping piece to rotate the fastening nut and screw, so that the screw and nut in a small space can be completely fastened, avoiding air duct installation quality problems caused by installation difficulties in a confined space.

Description

Technical Field

[0001] The invention belongs to the field of air duct installation equipment, and in particular relates to a telescopic confined space air duct flange fastening device. Background Art

[0002] In the existing air duct installation process, the use of bolt fixation is still the most common installation method. It is characterized by good stability and high cost performance. However, the air duct is generally installed near the roof and is very close to the roof. During the installation process, it is difficult for the installer to extend his hands or installation tools to the position of the fixing bolts. Therefore, the air duct installation quality problems often occur due to the difficulty of installation in limited space.

[0003] There are currently related patents addressing this issue, such as the patent CN215470810U titled "Fastening Device for Bolts and Nuts in Duct Installation." The patent comprises: a removable mounting structure secured to the duct flange, the mounting structure having a stopper corresponding to the bolt hole in the duct flange, the stopper securing the bolt; a first horizontal rod having a first spiral bevel gear secured to one end; a second vertical rod having a second spiral bevel gear secured to one end that engages the first spiral bevel gear; and a magnetic sleeve secured to the other end of the second rod for absorbing the nut. The first rod drives the second rod to rotate to tighten the nut and bolt. This patent allows the installation tool to be extended to the screw position and then secure the screw using a connecting rod. However, it also has drawbacks. First, the alignment of the screw and nut is problematic when operating the tool from a distance, making installation inconvenient. Another issue is that the nut needs to be secured to the flange in advance, which can easily cause the screw to become misaligned during on-site installation and handling, resulting in problems with the duct docking. Summary of the Invention

[0004] The present invention aims to provide a retractable confined space air duct flange fastening device to solve the technical problem that air ducts are generally installed near the roof and are very close to the roof. During the installation process, it is difficult for the installer to extend his hands or installation tools to the position of the fixing bolts. Therefore, the air duct installation quality problems often occur due to the difficulty of installation in a confined space.

[0005] To achieve the above objectives, the specific technical solution of the telescopic confined space air duct flange fastening device of the present invention is as follows:

[0006] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0007] Furthermore, the interior of the telescopic mother rod is a square hollow structure; a first bolt is provided between the telescopic mother rod and the telescopic sub-rod.

[0008] Furthermore, the interior of the stretching mother rod is a square hollow structure; a second bolt is provided between the stretching mother rod and the stretching sub-rod.

[0009] Furthermore, a fixed handle is provided at one end of the telescopic mother rod away from the telescopic sub-rod; and a telescopic handle is provided inside the fixed handle at one end of the stretching mother rod away from the stretching sub-rod.

[0010] Furthermore, a spring is provided between the connecting shaft and the mounting groove.

[0011] Furthermore, the interior of the sleeve is made of magnetic steel; the sleeve on one side close to the universal joint is a nut-fixed sleeve; and the sleeve on the other side is a screw-fixed sleeve.

[0012] Furthermore, a sliding groove is provided on the lower side of one end of the telescopic sub-rod close to the clamping piece; the sliding groove is connected to the telescopic sub-rod through a third bolt; and the sliding groove can be replaced and installed according to the width of the working flange.

[0013] Furthermore, the size of the sleeve can be selected according to the bolt specifications and models specified in the flange design.

[0014] The telescopic confined space air duct flange fastening device of the present invention has the following advantages: the cooperation of a telescopic mother rod, a telescopic sub-rod, a stretching mother rod, and a stretching sub-rod is adopted to achieve the adjustment of the length of the overall device, which is suitable for the installation of air duct flanges of different specifications; the driving shaft drives the rotating shaft sleeve in the clamping piece to rotate the fastening nut and the screw, so that the screw and nut in the narrow space can be completely tightened, avoiding the quality problem of air duct installation caused by the difficulty of installation in the confined space; the sleeve arranged on the rotating shaft can be selected in different specifications according to needs, and the applicability is high; a replaceable and adjustable sliding groove is provided on the lower side of the telescopic sub-rod, which can be selected for installation according to the flange width, and is suitable for the installation of flanges of different specifications, models and widths. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0016] Figure 2 For the present invention Figure 1 A magnified schematic diagram of area A in the middle;

[0017] Figure 3 It is a schematic diagram of the structure of the present invention from above;

[0018] Figure 4 It is a side structural schematic diagram of the present invention;

[0019] Explanation of the marks in the figure: 1. Telescopic mother rod; 2. Telescopic sub-rod; 201. Mounting slot; 3. Clamping plate; 4. Tensile mother rod; 5. Tensile sub-rod; 6. Connecting shaft; 7. Connecting plate; 8. Rotating shaft; 9. Sleeve; 10. Universal joint; 11. Commutator; 12. Transmission mother rod; 13. Transmission sub-rod; 14. Drive shaft; 15. First bolt; 16. Second bolt; 17. Fixed handle; 18. Telescopic handle; 19. Spring; 20. Sliding groove; 21. Third bolt. DETAILED DESCRIPTION

[0020] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of a retractable confined space air duct flange fastening device of the present invention in conjunction with the accompanying drawings.

[0021] like Figure 1-4As shown, the present invention is a telescopic confined space air duct flange fastening device, comprising a telescopic mother rod 1; a telescopic sub-rod 2 is slidably provided in the telescopic mother rod 1, and the interior of the telescopic mother rod 1 is a square hollow structure; a first bolt 15 is provided between the telescopic mother rod 1 and the telescopic sub-rod 2, and the telescopic sub-rod 2 is symmetrically rotated on both sides away from one end of the telescopic mother rod 1; a stretching mother rod 4 is slidably provided on one side of the telescopic mother rod 1; a stretching sub-rod 5 is slidably provided in the stretching mother rod 4, and a second bolt 16 is provided between the stretching mother rod 4 and the stretching sub-rod 5, an installation groove 201 is provided on the upper side of the telescopic sub-rod 2 near the clamping piece 3, a connecting shaft 6 is slidably provided on the stretching sub-rod 5 in the installation groove 201, a spring 19 is provided between the connecting shaft 6 and the installation groove 201, and a spring 19 is provided on both sides of the connecting shaft 6 for rotation. The connecting piece 7 is connected to the relative clamping piece 3 by rotation; the two clamping pieces 3 are provided with rotating shafts 8 relative to each other, and the two rotating shafts 8 are relatively pluggable and provided with sleeves 9, and one rotating shaft 8 extends outward to the outside of the clamping piece 3 and is provided with a universal joint 10; the telescopic mother rod 1 and the telescopic sub-rod 2 are symmetrically provided with a commutator 11 on the side away from one end; a mechanical connection is adopted between the universal joint 10 and the commutator 11 provided on one side of the telescopic sub-rod 2; the two commutators 11 are mechanically connected by a transmission mother rod 12 and a transmission sub-rod 13 connected by a sliding connection; the commutator 11 provided on one side of the telescopic mother rod 1 is extended outwardly and is provided with a drive shaft 14, the telescopic mother rod 1 is provided with a fixed handle 17 on the end away from the telescopic sub-rod 2, and the stretching mother rod 4 is provided with a telescopic handle 18 inside the fixed handle 17 on the end away from the stretching sub-rod 5.

[0022] Combine Figure 1-4As shown, when in use, according to the width of the flange for installing the air duct, the length of the telescopic mother rod 1 and the telescopic child rod 2 is adjusted, and the lengths of the stretching mother rod 4, the stretching child rod 5 and the transmission mother rod 12 and the transmission child rod 13 are matched and adjusted. After the adjustment is completed, the length of the telescopic mother rod 1 and the telescopic child rod 2 are fixed by the first bolt 15, and the length of the stretching mother rod 4 and the stretching child rod 5 are fixed by the second bolt 16. The nut and the screw are placed in the corresponding sleeve 9. The staff holds the fixed handle 17 and extends the device into the gap between the flange of the air duct to be installed and the roof, pulls the telescopic handle 18, and the telescopic handle 18 drives the stretching mother rod 4 and the stretching child rod 5 to move. The stretching child rod 5 drives the connecting shaft 6 set in the installation groove 201 of the telescopic child rod 2 to slide, compresses the spring 19 and pulls the connecting piece 7 at the same time, drives the clamping pieces 3 on both sides to open, and The opened clamping piece 3 is placed on the flange, and the telescopic handle 18 is released. The spring 19 pushes the connecting shaft 6 and the connecting piece 7 so that the opened clamping pieces 3 on both sides are clamped on the duct flange. At this time, the staff holds the fixed handle 17 and pushes the device along the flange. When the sleeve 9 reaches the position of the duct flange bolt mounting hole, the spring 19 pushes the clamping pieces 3 on both sides to drive the screws and nuts installed in the sleeve 9 through the mounting holes of the flange. Then, the drive shaft 14 is driven by the handheld driving device. The drive shaft 14 drives the universal joint 10 through the commutator 11, the transmission mother rod 12, and the transmission sub-rod 13, driving the rotating shaft 8 and the sleeve 9 set on one side of the clamping piece 3 to rotate, tighten the nut and screw, and then pull the telescopic handle 18 to remove the tightened nut and screw from the sleeve 9, withdraw the device, and complete the fastening installation of the duct flange in the confined space.

[0023] The interior of the sleeve 9 is made of magnetic steel. When the nuts and screws are installed inside the sleeve 9, the magnetic steel sleeve 9 can absorb the nuts or screws to avoid the nuts or screws falling off when the device is extended into the confined space between the air duct and the roof, affecting the installation progress; the sleeve 9 on the side close to the universal joint 10 is a nut fixing sleeve, and the sleeve 9 on the other side is a screw fixing sleeve. During the use of this device, the commutator 11 is driven by the drive shaft 14 to drive the mother rod 12, the transmission sub-rod 13 and the universal joint 10 to drive the rotating shaft 8 on the side close to the universal joint 10 to rotate, drive the sleeve 9 and the nut set inside to rotate, and cooperate with the screw in the sleeve 9 on the other side to rotate and tighten the screw and nut to complete the fastening installation of the air duct flange.

[0024] The telescopic rod 2 is provided with a sliding groove 20 on the lower side of one end near the clamping piece 3. The sliding groove 20 is connected to the telescopic rod 2 by a third bolt 21. The sliding groove 20 can be replaced and installed according to the flange width of the working air duct. Before extending the device into the gap between the flange of the air duct to be installed and the roof, a suitable sliding groove 20 is selected according to the flange width of the air duct and fixed to the lower side of the telescopic rod 2 by the third bolt 21. When using the device to install the air duct flange, the sliding groove 20 provided on the lower side of the telescopic rod 2 is replaced and installed. It is buckled on the flange of the air duct, so that the sliding groove 20 can be used to push the device to slide on the air duct flange; according to the height of the mounting hole of the air duct flange, the distance between the sliding groove 20 and the telescopic sub-rod 2 is adjusted by the third bolt 21, so that the rotating shaft 8 and the sleeve 9 set on the two clamping pieces 3 are opposite to the mounting hole of the air duct flange in the vertical direction, and then the device is pushed to slide on the air duct flange. When the sleeve 9 is aligned with the mounting hole position of the air duct flange, the device is used to tighten the screws and nuts for installation, making the installation of the air duct flange more convenient and efficient.

[0025] A sleeve 9 is installed on the rotating shaft 8 in a pluggable manner. The size of the sleeve 9 can be selected according to the bolt specifications and models specified in the flange design and installed on the rotating shaft 8, so that the device is suitable for the installation and tightening of various types of duct flanges. Combined with the telescopic mother rod 1 and the telescopic sub-rod 2, the stretching mother rod 4 and the stretching sub-rod 5, the transmission mother rod 12 and the transmission sub-rod 13 that can freely adjust the length, the device can be freely telescoped and adjusted in length according to the actual situation on site, matching the model specifications of the duct flange, and performing bolt tightening installation work on the position of the duct flange in the confined space at the edge of the duct. The on-site operator does not need to enter the confined space, thereby improving work efficiency and project quality.

[0026] It will be understood that the present invention is described by way of some embodiments, and it will be appreciated by those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A retractable confined space air duct flange fastening device, characterized in that: The invention comprises a telescopic mother rod (1); a telescopic sub-rod (2) is slidably provided in the telescopic mother rod (1); a clamping piece (3) is symmetrically rotated on both sides of the telescopic sub-rod (2) away from one end of the telescopic mother rod (1); a stretching mother rod (4) is slidably provided on one side of the telescopic mother rod (1); a stretching sub-rod (5) is slidably provided in the stretching mother rod (4); a mounting groove (201) is provided on the upper side of the telescopic sub-rod (2) near the clamping piece (3); a connecting shaft (6) is slidably provided in the mounting groove (201); a connecting piece (7) is rotatably provided on both sides of the connecting shaft (6) and is rotatably connected to the opposite clamping piece (3); a rotating shaft (8) is relatively provided on the two clamping pieces (3); a sleeve (9) is relatively pluggable and provided on the two rotating shafts (8); a universal joint (10) is provided on the outer side of the clamping piece (3); the telescopic mother rod (1) and the telescopic sub-rod (2) are relatively far away from each other. A commutator (11) is symmetrically arranged on one side of one end; a mechanical connection is adopted between the universal joint (10) and the commutator (11) arranged on one side of the telescopic sub-rod (2); the two commutators (11) are mechanically connected by a transmission mother rod (12) and a transmission sub-rod (13) that are slidably connected; the commutator (11) arranged on one side of the telescopic mother rod (1) is provided with a drive shaft (14) extending outward; a spring (19) is provided between the connecting shaft (6) and the mounting groove (201); the interior of the sleeve (9) is made of magnetic steel; the sleeve (9) on the side close to the universal joint (10) is a nut fixing sleeve; the sleeve (9) on the other side is a screw fixing sleeve; a sliding groove (20) is provided on the lower side of one end of the telescopic sub-rod (2) close to the clamping piece (3); the sliding groove (20) is connected to the telescopic sub-rod (2) through a third bolt (21); the sliding groove (20) can be replaced and installed according to the width of the working flange.

2. The retractable confined space air duct flange fastening device according to claim 1, characterized in that: The interior of the telescopic mother rod (1) is a square hollow structure; a first bolt (15) is provided between the telescopic mother rod (1) and the telescopic sub-rod (2).

3. The retractable confined space air duct flange fastening device according to claim 1, characterized in that: The interior of the stretching mother rod (4) is a square hollow structure; a second bolt (16) is provided between the stretching mother rod (4) and the stretching sub-rod (5).

4. The retractable confined space air duct flange fastening device according to claim 1, characterized in that: The telescopic mother rod (1) is provided with a fixed handle (17) at one end away from the telescopic sub-rod (2); and the stretching mother rod (4) is provided with a telescopic handle (18) inside the fixed handle (17) at one end away from the stretching sub-rod (5).

5. The retractable confined space air duct flange fastening device according to claim 1, characterized in that: The size of the sleeve (9) can be selected according to the bolt specifications specified in the flange design.

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