Bolt tensioner for mounting tower drum at bottom section of fan

Abstract

The utility model relates to the technical field of bolt tensioners, in particular to a bolt tensioner for mounting a tower drum at the bottom section of a fan, which comprises a fixing frame, an inserting groove is arranged at the top end of the fixing frame, a fixing ring is mounted on the inner wall of the inserting groove, an inserting hole is arranged on the surface of the fixing ring, a threaded ring is arranged on the inner wall of the fixing ring, and the threaded ring is connected with the inserting groove. And one side of the threaded ring is rotationally connected with a threaded rod. According to the bolt tensioner for installing the tower drum at the bottom section of the fan, through the arrangement of the fixing frame, the inserting groove, the fixing ring, the inserting hole, the threaded ring and the threaded rod, when the bolt tensioner is used, the threaded rod is rotated, the threaded rod rotates on the surface of the fixing ring and pushes the threaded ring to move towards the middle of the fixing ring, and bolts of different sizes are clamped; and then by inserting the inserting rod into the inserting hole and rotating the inserting rod, the threaded ring and the bolt can be connected and fixed, and the fixing ring is driven downwards to move downwards in the inserting groove formed in the fixing frame, so that the effect of being adaptive to bolts of different sizes for clamping is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt tensioners, in particular to a bolt tensioner for installing a bottom section tower of a wind turbine. Background Art

[0002] The bolt tensioner uses the hydraulic pressure provided by a hydraulic booster pump (ultra-high pressure hydraulic pump) to determine the tensile force based on the tensile strength, yield factor, and elongation of the material. It utilizes the tensile force generated by the ultra-high pressure pump to stretch the bolt within its elastic deformation zone, slightly deforming the bolt diameter and thus facilitating the loosening of the nut.

[0003] However, the existing bolt tensioners for installing the bottom section of the wind turbine tower have the following disadvantages:

[0004] (1) The existing bolt tensioner for installing the bottom section of the wind turbine tower has a weak adaptability. When in use, the bolt tensioner of the existing technology cannot adapt to different bolts for tensioning, which has certain limitations;

[0005] (2) The existing bolt tensioner for installing the bottom section of the wind turbine tower has a weak limit sealing function. When in use, the existing technology may cause excessive stretching due to the lack of a limit structure inside the continuous release device of the hydraulic oil when stretching the bolt. Utility Model Content

[0006] The purpose of the utility model is to provide a bolt tensioner for installing the bottom section tower of a wind turbine, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a bolt tensioner for installing the bottom section tower of a wind turbine, comprising a fixing frame, a slot is provided at the top of the fixing frame, a fixing ring is installed on the inner wall of the slot, a socket is provided on the surface of the fixing ring, a threaded ring is provided on the inner wall of the fixing ring, a threaded rod is rotatably connected to one side of the threaded ring, the threaded rod is connected to the fixing ring, a limiting ring is installed on the inner wall of the slot at the bottom end of the fixing ring, a sealing ring is installed on the surface of the limiting ring, a limiting block is fixedly connected to one side of the sealing ring, and a sliding groove is provided on the inner wall of the slot.

[0008] Optionally, a connecting port is fixedly connected to one side of the fixing frame, and the connecting port fits in the slot. Through the installation of the connecting port, the connecting port is made of high-strength material and can withstand the pressure of hydraulic oil transmission.

[0009] Optionally, an oil inlet is opened on one side of the connecting port, and a transmission pipe is installed on the inner wall of the oil inlet, and the transmission pipe is used to transmit hydraulic oil.

[0010] Optionally, a fixed groove is opened on one side of the transmission pipe, and a high-pressure hydraulic pump is fixedly connected to the inner wall of the fixed groove. The high-pressure hydraulic pump is connected to an external power supply and can transmit hydraulic oil from the transmission pipe to the slide groove.

[0011] Optionally, a buffer pad is fixedly connected to the bottom end of the fixing ring, and the bottom end of the buffer pad fits with the limiting ring. The installation of the buffer pad can avoid wear caused by the contact between the fixing ring and the limiting ring.

[0012] Optionally, a slot is provided on the surface of the transmission pipe, and a pressure gauge is fixedly connected to the inner wall of the slot. The pressure gauge is installed to check the internal pressure of the hydraulic oil for timely regulation.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The bolt tensioner for installing the bottom section of the wind turbine tower is arranged through the setting of a fixing frame, a slot, a fixing ring, a socket, a threaded ring and a threaded rod. When in use, by rotating the threaded rod, the threaded rod rotates on the surface of the fixing ring and pushes the threaded ring to move toward the middle of the fixing ring, and clamps bolts of different sizes. Then, by inserting the insertion rod into the socket and rotating it, the threaded ring can be connected and fixed with the bolt and the fixing ring can be driven downward to move downward in the slot opened in the fixing frame, thereby achieving the effect of adapting to bolts of different sizes for clamping.

[0015] 2. The bolt tensioner for installing the bottom section of the wind turbine tower is equipped with a limit ring, a sealing ring, a limit block and a slide. When in use, hydraulic oil is introduced into the slide, and the hydraulic oil pushes the limit ring upward. The sealing ring connected to the limit ring is used to prevent hydraulic oil leakage. After the limit ring moves to the highest stretching limit, the limit block presses against the slide to prevent the limit ring from moving upward, thereby achieving the effect of avoiding the bolt limitation caused by the inability of the stretching bolt to be limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall appearance of the utility model;

[0017] Figure 2 This is a schematic diagram of the disassembly of the fixed frame of the utility model;

[0018] Figure 3 This is a schematic diagram of the disassembly of the fixing ring of the utility model;

[0019] Figure 4 It is a schematic cross-sectional view of the interior of the fixing frame of the present invention.

[0020] In the figure: 1. Fixing frame; 2. Slot; 3. Fixing ring; 4. Jack; 5. Threaded ring; 6. Threaded rod; 7. Limiting ring; 8. Sealing ring; 9. Limiting block; 10. Slide; 11. Connecting port; 12. Transmission pipe; 13. High-pressure hydraulic pump; 14. Buffer pad; 15. Pressure gauge. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-Figure 4 As shown, the utility model provides a technical solution: a bolt tensioner for installing the bottom section tower of a wind turbine, comprising a fixing frame 1, a slot 2 is provided at the top of the fixing frame 1, a fixing ring 3 is installed on the inner wall of the slot 2, a socket 4 is provided on the surface of the fixing ring 3, a threaded ring 5 is provided on the inner wall of the fixing ring 3, a threaded rod 6 is rotatably connected to one side of the threaded ring 5, the threaded rod 6 is connected to the fixing ring 3, a limiting ring 7 is installed on the inner wall of the slot 2 at the bottom end of the fixing ring 3, a sealing ring 8 is installed on the surface of the limiting ring 7, a limiting block 9 is fixedly connected to one side of the sealing ring 8, a sliding groove 10 is provided on the inner wall of the slot 2, and the threaded rod 6 is rotated on the surface of the fixing ring 3. By rotating and pushing the threaded ring 5 to move toward the middle of the fixing ring 3 and clamping bolts of different sizes, the threaded ring 5 can be fixedly connected to the bolt by inserting the insertion rod into the insertion hole 4 and rotating it, and the fixing ring 3 can be driven downward to move downward in the slot 2 opened in the fixing frame 1, thereby achieving the effect of adapting to bolts of different sizes for clamping. By introducing hydraulic oil into the slide groove 10, the hydraulic oil pushes the limit ring 7 upward, and the sealing ring 8 connected to the limit ring 7 is used to prevent hydraulic oil leakage. After the limit ring 7 moves to the highest tensile limit, the limit block 9 presses against the slide groove 10 to prevent the limit ring 7 from moving upward, thereby achieving the effect of preventing the tensile bolt from being unable to limit and causing the bolt to be limited.

[0023] A connection port 11 is fixedly connected to one side of the fixing frame 1. The connection port 11 fits in the slot 2. The connection port 11 is made of high-strength material and can withstand the pressure of hydraulic oil transmission.

[0024] An oil inlet is provided on one side of the connection port 11, and a transmission pipe 12 is installed on the inner wall of the oil inlet. The transmission pipe 12 is used to transmit hydraulic oil.

[0025] A fixed groove is opened on one side of the transmission pipe 12, and a high-pressure hydraulic pump 13 is fixedly connected to the inner wall of the fixed groove. The high-pressure hydraulic pump 13 is connected to an external power source and can transmit hydraulic oil from the transmission pipe 12 to the chute 10;

[0026] The bottom end of the fixing ring 3 is fixedly connected with a buffer pad 14, and the bottom end of the buffer pad 14 is in contact with the limiting ring 7. The installation of the buffer pad 14 can avoid wear caused by the contact between the fixing ring 3 and the limiting ring 7;

[0027] A slot is provided on the surface of the transmission pipe 12, and a pressure gauge 15 is fixedly connected to the inner wall of the slot. The pressure gauge 15 is installed to check the internal pressure of the hydraulic oil for timely regulation.

[0028] In the present invention, the working steps of the device are as follows:

[0029] Step 1: By rotating the threaded rod 6, the threaded rod 6 rotates on the surface of the fixing ring 3 and pushes the threaded ring 5 to move toward the middle of the fixing ring 3, thereby clamping bolts of different sizes. Then, by inserting the insertion rod into the insertion hole 4 and rotating it, the threaded ring 5 can be connected and fixed with the bolt and downwardly drive the fixing ring 3 to move downward in the slot 2 opened in the fixing frame 1, thereby achieving the effect of adapting to bolts of different sizes for clamping;

[0030] The second step: by injecting hydraulic oil into the chute 10, the hydraulic oil pushes the limit ring 7 upward, and the sealing ring 8 connected to the limit ring 7 is used to prevent hydraulic oil leakage. After the limit ring 7 moves to the highest stretching limit, the limit block 9 presses against the chute 10 to prevent the limit ring 7 from moving upward, thereby achieving the effect of preventing the tension bolt from being unable to limit and causing the bolt to be limited;

[0031] The third step: through the installation of the connecting port 11, the connecting port 11 is made of high-strength material and can withstand the pressure of hydraulic oil transmission. The transmission pipe 12 is used to transmit hydraulic oil. The high-pressure hydraulic pump 13 is connected to an external power supply to transmit the hydraulic oil from the transmission pipe 12 to the slide 10. The installation of the buffer pad 14 can avoid wear caused by the contact between the fixed ring 3 and the limit ring 7. The installation of the pressure gauge 15 is used to check the internal pressure of the hydraulic oil, which is convenient for timely regulation.

[0032] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A bolt tensioner for installing a bottom section tower of a wind turbine, comprising a fixing frame (1), characterized in that: The top of the fixing frame (1) is provided with a slot (2), the inner wall of the slot (2) is provided with a fixing ring (3), the surface of the fixing ring (3) is provided with a socket (4), the inner wall of the fixing ring (3) is provided with a threaded ring (5), one side of the threaded ring (5) is rotatably connected to a threaded rod (6), the threaded rod (6) is connected to the fixing ring (3), the inner wall of the slot (2) is provided with a limiting ring (7) at the bottom end of the fixing ring (3), the surface of the limiting ring (7) is provided with a sealing ring (8), a limiting block (9) is fixedly connected to one side of the sealing ring (8), and the inner wall of the slot (2) is provided with a sliding groove (10).

2. A bolt tensioner for installing a wind turbine bottom tower according to claim 1, characterized in that: A connection port (11) is fixedly connected to one side of the fixing frame (1), and the connection port (11) fits in contact with the slot (2).

3. A bolt tensioner for installing a wind turbine bottom tower according to claim 2, characterized in that: An oil inlet is provided on one side of the connecting port (11), and a transmission pipe (12) is installed on the inner wall of the oil inlet.

4. A bolt tensioner for installing a wind turbine bottom tower according to claim 1, characterized in that: The bottom end of the fixing ring (3) is fixedly connected to a buffer pad (14), and the bottom end of the buffer pad (14) is in contact with the limiting ring (7).

5. The bolt tensioner for installing the bottom section tower of a wind turbine according to claim 3, characterized in that: A card slot is provided on the surface of the transmission pipe (12), and a pressure gauge (15) is fixedly connected to the inner wall of the card slot.

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