Bolt torque detection device of bolt tensioner and use method of bolt torque detection device

Abstract

The invention relates to the technical field of bolt torque detection devices, and discloses a bolt torque detection device of a bolt tensioner, aiming at bolts distributed at the upper part of a tensioner main body, corresponding fastening sleeve heads are arranged at the lower part of the device, and the fastening sleeve heads are connected and driven through a transmission assembly, so that synchronous tightening and mounting of a plurality of bolts can be completed at the same time; the torque transmission caulking groove and the torque transmission protruding block are connected in an aligned and embedded mode under pushing and pressing of the spring, an adjustable torque type driving connection structure is adopted, and the transmission torque between the fastening rotating base and the sleeve head connecting base can be controlled and adjusted by screwing the adjusting head column to change the pushing and pressing force of the spring. According to the device, the torque of the bolt can be accurately controlled while the bolt is tightened, the fastening sleeve head is of a split structure, the fastening sleeve head is detachably installed on the lower portion of the sleeve head connecting base, the fastening sleeve heads of different specifications can be replaced according to the types of the bolts, and the device can meet the fastening and torque detection requirements of the bolts of different specifications.

Description

Technical Field

[0001] The present invention relates to the technical field of bolt torque detection devices, in particular to a bolt torque detection device for a bolt tensioner and a use method thereof. Background Art

[0002] Bolt tensioners are hydraulic sources provided by hydraulic booster pumps. The tensile force is determined according to the tensile strength, yield coefficient and elongation of the material. The tensile force generated by the ultra-high pressure oil pump is used to stretch the bolts to which force is applied within their elastic deformation zone, causing the bolt diameter to deform slightly, making it easy to loosen or tighten the nuts. There is no torsional shear force or lateral force, and there is no friction damage to the contact surface of the connection. They are widely used in petrochemical, nuclear power, wind power, hydropower, thermal power, shipbuilding, railways, aerospace, mining, heavy machinery and other fields.

[0003] In order to install and tighten, the bolts need to be tightened after being stretched by the cylinder. In order to meet the tightening requirements, the bolt tightening has torque requirements. In order to ensure that the torque of all bolts on the entire bolt tensioner is within the standard range, a torque detector is required to measure the bolt tightening torque. In order to improve the stretching efficiency, the existing bolt tensioners mostly adopt a workstation stretching structure. In order to tighten the stretched bolts with a fixed torque, multiple bolts need to be tightened and measured alternately through a torque detection device. The operation is complicated and inconvenient to use. Therefore, a bolt torque detection device for a bolt tensioner is proposed. Summary of the invention

[0004] The object of the present invention is to provide a bolt torque detection device for a bolt tensioner and a method of using the same, so as to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a bolt torque detection device for a bolt tensioner, comprising a detection mechanism for measuring the tightening of bolts on the upper part of a tensioner body, the detection mechanism comprising a housing assembly and a drive assembly, the housing assembly comprising a mounting housing and a mounting cover, the drive assembly being mounted inside the mounting housing through the mounting cover; The driving assembly includes a fastening driving column, a transmission gear column, an adjusting head column, a spring, a fastening rotary seat, a sleeve head connecting seat and a fastening sleeve head. The fastening rotary seats are provided in plurality, and several of the fastening rotary seats are equidistantly rotatably installed inside the mounting shell seat. The transmission gear column is meshingly installed between two adjacent fastening rotary seats. The fastening driving column is installed on the upper part of the transmission gear column on one side. The spring is movably pressed against the upper part of the fastening rotary seat installed under the push of the adjusting head column. The connecting sides of the fastening rotary seat and the sleeve head connecting seat are respectively provided with a torque transmission groove and a torque transmission protrusion. The torque transmission groove and the torque transmission protrusion are aligned and engaged with each other under the push of the spring, and the fastening sleeve head is detachably installed on the lower part of the sleeve head connecting seat.

[0006] Preferably, the interior of the above-mentioned mounting shell seat is evenly provided with mounting grooves, the fastening rotary seat and the sleeve connecting seat are concentrically rotatably engaged and installed on the inner side of the mounting groove, the fastening rotary seat is located at the upper part of the sleeve connecting seat, the upper part of the sleeve connecting seat is provided with an annular groove, the lower part of the fastening rotary seat is provided with an annular boss, and the annular boss is movably engaged and installed with the annular groove.

[0007] Preferably, the torque transmission groove is evenly opened on the bottom side of the annular boss in a circular shape, the torque transmission protrusion is evenly fixedly installed on the bottom side of the annular groove in a circular shape, and the torque transmission protrusion is embedded in the inner side of the torque transmission groove.

[0008] Preferably, a ceramic top plate is fixed on both the upper and lower sides of the spring, a circular ring-shaped protrusion is provided at the bottom of the lower ceramic top plate, a circular ring-shaped groove is provided on the upper part of the fastening rotary seat, and the circular ring-shaped protrusion is slidably engaged in the inner side of the circular ring-shaped groove.

[0009] Preferably, a torque reference mark is provided on the circumferential side of the adjusting head column, an adjusting screw seat is fixed to the lower part of the adjusting head column, an adjusting screw hole is provided on the upper part of the mounting shell seat, the adjusting screw seat is threadedly installed on the inner side of the adjusting screw hole, and a hexagonal recessed hole is provided on the upper part of the adjusting head column.

[0010] Preferably, a push post is provided at the lower portion of the adjusting screw seat, a post embedding groove is provided at the upper portion of the ceramic top plate, and the lower end of the push post is embedded in and abuts against the inner side of the post embedding groove.

[0011] Preferably, a gear column mounting groove is provided on the side of the above-mentioned mounting groove, a supporting shaft column is fixedly installed inside the gear column mounting groove, the transmission gear column is rotatably installed on the inner side of the gear column mounting groove through the supporting shaft column, and a transmission tooth groove is provided on the circumferential side of the fastening rotary seat, and the transmission gear column is installed between the two fastening rotary seats through the meshing of the transmission tooth groove.

[0012] Preferably, the above-mentioned mounting cover is fixedly installed on the upper opening side of the mounting shell seat by bolts, the lower part of the fastening drive column movably passes through the mounting cover, the lower part of the fastening drive column is fixedly connected to the upper part of the middle transmission gear column through the shaft column, and the upper part of the fastening drive column is provided with a hexagonal drive hole.

[0013] Preferably, the distribution positions of the fastening sleeve and the upper bolts of the stretcher body correspond to each other, a docking slot is provided at the lower portion of the sleeve connecting seat, a docking pin is fixed at the upper portion of the fastening sleeve, the docking pin is inserted and installed in the inner side of the docking slot, a ball head protrusion is provided on the side of the docking pin, and the ball head protrusion is inserted and connected in the limiting groove on the inner side of the docking slot.

[0014] To achieve the above object, the present invention also provides the following technical solution: a method for using a bolt torque detection device of a bolt tensioner, the steps of which are: (1) When using, select the appropriate specification of the fastening sleeve according to the bolt model; (2) After the bolt is stretched by the tensioner body, the fastening sleeve is placed on the end of the bolt, and then the fastening sleeve and the sleeve connector are docked and installed by alignment and engagement; (3) Then firmly install the shell base and use a hexagonal wrench to turn the adjustment head column. According to the torque reference mark on the upper part of the adjustment head column, adjust and set the tightening torque of the bolt; (4) When the adjusting head column is turned, the thread feed action is performed through the adjusting screw seat at the lower part of the adjusting head column and the adjusting screw hole at the lower part of the installation cover, and the ceramic top plate on the upper part of the spring is pushed by pushing. By changing the compression amount of the spring, the clamping force between the fastening seat and the sleeve connection seat is changed, and the control and adjustment of the tightening torque is completed; (5) After completion, align the head of the hexagonal wrench or electric wrench and insert it into the hexagonal hole on the upper part of the fastening drive column, and then drive the fastening drive column to rotate. Under the drive of the fastening drive column, the transmission tooth column drives multiple fastening rotary seats to rotate synchronously through meshing transmission. The fastening rotary seats transmit the torque to the socket connection seat below through the slot block engagement transmission, and the socket connection seat drives the fastening socket to tighten the bolt; (6) When the set torque is reached, the torque transmission protrusion is disengaged from the torque transmission groove under the action of the torque and pushes up the fastening seat; (7) The tightening seat and the sleeve connection seat are separated, the torque transmission is lost and the tightening operation is stopped. The user will hear a rhythmic clicking sound when the slot block is pulled out, completing the tightening and torque measurement operation of the bolt.

[0015] Compared with the prior art, the present invention adopts the above technical solution and has the following technical effects: 1. This torque detection device adopts a multi-head structure for tightening multiple bolts. Corresponding tightening heads are arranged at the lower part of the device for the bolts on the upper part of the tensioner body. The tightening heads are connected and driven by the transmission assembly, and can complete the synchronous tightening and installation of multiple bolts at the same time without multiple tightening. Compared with the traditional single-head detection device, it has better operation convenience.

[0016] 2. An adjustable torque-type drive connection structure is adopted. The fastening seat and the sleeve connection seat are connected through the torque transmission protrusion and the torque transmission groove under the push of the spring. After the set torque is reached, the fastening seat and the sleeve connection seat automatically slide and separate. The transmission torque between the fastening seat and the sleeve connection seat can be controlled and adjusted by turning the adjusting head column to change the pushing force of the spring. The tightening torque of the fastening sleeve can be accurately adjusted by turning the adjusting head column corresponding to the scale mark. The torque of the bolt can be accurately controlled while tightening the bolt, and there is no need for secondary detection.

[0017] 3. The device has a simple structure and compact layout, and adopts a split structure setting for the fastening sleeve. The fastening sleeve is engaged with the groove at the bottom of the sleeve connecting seat through the engaging head seat, which is easy to disassemble and assemble. Fastening sleeves of different specifications and quantities can be replaced according to the type of bolts and the number of fastenings, so that the device can meet the fastening and torque detection requirements of bolts of different specifications, greatly improving the flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the overall working installation structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the stretcher main body of the present invention; Figure 3 It is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 4 It is a schematic diagram of the overall split upper side structure of the present invention; Figure 5 It is a schematic diagram of the overall split lower side structure of the present invention; Figure 6 It is a schematic diagram of the installation structure of the drive structure of the present invention; Figure 7 It is a schematic diagram of the split structure of the overall upper side of the drive assembly of the present invention; Figure 8 It is a schematic diagram of the overall split structure of the lower side of the drive assembly of the present invention.

[0020] Explanation of the reference numerals: 1. stretcher body; 2. mounting shell seat; 3. mounting cover; 4. fastening drive column; 5. transmission gear column; 6. adjusting head column; 7. spring; 8. fastening rotary seat; 9. sleeve connecting seat; 10. fastening sleeve; 11. adjusting screw seat; 12. adjusting screw hole; 13. ceramic top plate; 14. torque transmission groove; 15. torque transmission bump. 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 described embodiments 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 creative work are within the scope of protection of the present invention.

[0022] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the effects and purposes that can be achieved by this application.

[0023] Example See also Figure 1-8 The present invention provides a technical solution: a bolt torque detection device for a bolt tensioner, comprising a detection mechanism for determining the tightening of bolts on a tensioner body 1, the detection mechanism comprising a housing assembly and a drive assembly, the housing assembly being used for mounting support of the drive assembly, the housing assembly comprising a mounting housing 2 and a mounting cover 3, as shown in the attached Figure 3 As shown, the installation cover 3 is fixedly installed on the upper opening side of the installation shell 2 by bolts, and is used for installing and sealing the internal components of the installation shell 2.

[0024] The drive assembly is installed inside the mounting housing 2 through the mounting cover 3, and is used for tightening and driving the bolts. The drive assembly includes a tightening drive column 4, a transmission gear column 5, an adjustment head column 6, a spring 7, a tightening rotary seat 8, a sleeve connection seat 9 and a tightening sleeve 10. Four tightening rotary seats 8 are provided. In order to facilitate the connection and installation of the tightening rotary seats 8, as shown in the attached Figure 4As shown, installation grooves are evenly arranged inside the installation shell 2, and four fastening rotary seats 8 are equidistantly rotatably installed inside the installation shell 2. The transmission gear column 5 is used for connecting and transmitting the driving force. In order to connect and install the transmission gear column 5, a gear column mounting groove is arranged on the side of the installation groove, and a supporting shaft column is fixedly installed inside the gear column mounting groove. The transmission gear column 5 is rotatably installed on the inner side of the gear column mounting groove through the supporting shaft column. In order to perform transmission connection with the transmission gear column 5, a transmission tooth groove is arranged on the peripheral side of the fastening rotary seat 8, and the transmission gear column 5 is installed between the two fastening rotary seats 8 through the meshing of the transmission tooth groove. Under the transmission connection of the transmission gear column 5, the four fastening rotary seats 8 can perform synchronous rotation movement, and can simultaneously complete the synchronous tightening and installation of multiple bolts without multiple tightening. Compared with the traditional single-head detection device, it has better operation convenience.

[0025] The fastening drive column 4 is used for the overall drive of the device. The lower part of the fastening drive column 4 movably penetrates the installation cover 3. The lower part of the fastening drive column 4 is fixedly connected to the upper part of the middle transmission gear column 5 through a shaft column. In order to cooperate with an external driving tool for installation, a hexagonal driving hole is provided on the upper part of the fastening drive column 4.

[0026] The adjusting head column 6 is used for controlling and adjusting the tightening torque. In order to facilitate precise adjustment, a torque reference mark is arranged on the circumferential side of the adjusting head column 6. An adjusting screw seat 11 is fixed to the lower part of the adjusting head column 6, and an adjusting screw hole 12 is arranged on the upper part of the mounting shell seat 2. The adjusting screw seat 11 is threadedly installed on the inner side of the adjusting screw hole 12. The axial position of the adjusting head column 6 can be moved and adjusted by screwing. In order to facilitate the screwing operation of the adjusting head column 6, a hexagonal recessed hole is arranged on the upper part of the adjusting head column 6.

[0027] In order to be installed in conflict with the ceramic top plate 13, as shown in the attached Figure 7 As shown, a push column is provided at the lower part of the adjusting screw seat 11 to reduce the connection friction. Figure 7 As shown, a ceramic top sheet 13 is fixed on both the upper and lower sides of the spring 7, and a top column embedding groove is provided on the upper part of the ceramic top sheet 13, and the lower end of the push top column is embedded and abuts against the inner side of the top column embedding groove, as shown in the attached Figure 7 As shown, the fastening rotary seat 8 is located at the upper part of the sleeve connecting seat 9, and the fastening rotary seat 8 and the sleeve connecting seat 9 are concentrically rotatably engaged and installed on the inner side of the mounting groove. A circular ring-shaped protrusion is provided at the bottom of the lower ceramic top plate 13, and a circular ring-shaped groove is provided on the upper part of the fastening rotary seat 8. The circular ring-shaped protrusion is slidably engaged with the inner side of the circular ring-shaped groove, and the contact friction between the ceramic top plate 13 and the fastening rotary seat 8 can be reduced while in contact. The spring 7 moves under the push of the adjusting head column 6 to resist the upper part of the fastening rotary seat 8.

[0028] The upper part of the sleeve connecting seat 9 is provided with an annular embedding groove, and the lower part of the fastening rotary seat 8 is provided with an annular convex seat, and the annular convex seat is movably embedded in the annular embedding groove. In order to realize torque transmission, a torque transmission embedding groove 14 and a torque transmission convex block 15 are respectively provided on the connection side of the fastening rotary seat 8 and the sleeve connecting seat 9. The torque transmission embedding groove 14 is uniformly opened on the bottom side of the annular convex seat in a circumferential shape, and the torque transmission convex block 15 is uniformly fixedly installed on the bottom side of the annular embedding groove in a circumferential shape. The torque transmission embedding groove 14 and the torque transmission convex block 15 are in The push-down locking mechanism 7 is used to lock the screw thread 10 and the engagement ring 8 with the engagement ring 9. The engagement ring 8 is used to lock the screw thread 10 and the engagement ring 9 with the engagement ring 9. The engagement ring 8 is used to lock the screw thread 10 and the engagement ring 9 with the engagement ring 9.

[0029] As attached Figure 5 As shown, the fastening sleeve 10 corresponds to the distribution position of the bolts on the upper part of the tensioner body 1. In order to facilitate the connection and installation of the fastening sleeve 10, as shown in the attached Figure 5 As shown, a docking slot is provided at the lower part of the sleeve connecting seat 9, and a docking column is fixed at the upper part of the fastening sleeve 10, and the docking column is inserted and installed in the inner side of the docking slot, and a ball head protrusion is provided on the side of the docking column, and the ball head protrusion is inserted and connected with the limiting groove on the inner side of the docking slot. The fastening sleeve 10 is detachably installed at the lower part of the sleeve connecting seat 9, and is easy to disassemble and assemble. Different specifications and quantities of fastening sleeves 10 can be replaced according to the type of bolts and the number of fastenings, so that the device can meet the fastening and torque detection requirements of bolts of different specifications, which greatly improves the flexibility of the device.

[0030] Working principle or structural principle, when using, select the fastening sleeve 10 of appropriate specifications according to the bolt model, after completing the bolt stretching by completing the tensioner main body 1, put the fastening sleeve 10 on the end head of the bolt, and then complete the docking installation of the fastening sleeve 10 and the sleeve connecting seat 9 through alignment and fitting, then firmly install the shell seat 2 and use the hexagonal wrench to screw the adjusting head column 6, and adjust and set the tightening torque of the bolt by comparing with the torque reference mark on the upper part of the adjusting head column 6. When screwing the adjusting head column 6, the thread feed effect is performed through the adjusting screw seat 11 at the lower part of the adjusting head column 6 and the adjusting screw hole 12 at the lower part of the installation cover 3, and the ceramic top plate 13 on the upper part of the spring 7 is pushed by pushing, and the clamping force between the fastening rotary seat 8 and the sleeve connecting seat 9 is changed by changing the compression amount of the spring 7, so as to complete the control and adjustment of the tightening torque. After completion, the head of the hexagonal wrench or electric wrench is inserted into the The hexagonal hole on the upper part of the fastening driving column 4 is then driven to rotate. Under the drive of the fastening driving column 4, the transmission tooth column 5 drives multiple fastening rotary seats 8 to rotate synchronously through meshing transmission. The fastening rotary seat 8 transmits the torque to the sleeve connecting seat 9 below through the groove block engagement transmission, and the sleeve connecting seat 9 drives the fastening sleeve 10 to tighten the bolt. When the set torque is reached, the torque transmission protrusion 15 is disengaged from the torque transmission embedding groove 14 under the action of the torque and pushes up the fastening rotary seat 8. The fastening rotary seat 8 is separated from the sleeve connecting seat 9, the torque transmission is lost and the tightening operation is stopped. The user will hear a rhythmic clicking sound due to the disengagement of the groove block, completing the tightening and torque measurement operation of the bolt. The device can also perform the tightening operation of a single bolt. When performing the tightening measurement of a single bolt, only a single fastening sleeve 10 needs to be installed. The tightening measurement operation of a single bolt can be completed according to the above operation process.

[0031] In summary, the torque detection device adopts a multi-head structure for tightening multiple bolts. Corresponding tightening sleeves 10 are arranged at the lower part of the device for the bolts on the upper part of the tensioner body 1. The tightening sleeves 10 are connected and driven by a transmission assembly, and can simultaneously complete the synchronous tightening and installation of multiple bolts without multiple tightening. Compared with the traditional single-head detection device, it has better operation convenience and adopts an adjustable torque drive connection structure. The tightening seat 8 and the sleeve connecting seat 9 are engaged and connected with the torque transmission groove 14 through the torque transmission protrusion 15 under the push of the spring 7. After reaching the set torque, the tightening seat 8 and the sleeve connecting seat 9 automatically slide and separate, and the spring 7 is changed by turning the adjustment head column 6. The pushing force can control and adjust the transmission torque between the fastening rotary seat 8 and the sleeve connecting seat 9. The corresponding scale mark can be used to accurately adjust the screwing torque of the fastening sleeve 10 by turning the adjusting head column 6. The torque of the bolt can be accurately controlled while tightening the bolt, and there is no need for secondary detection. The device has a simple structure and compact layout, and a split structure is adopted for the fastening sleeve 10. The fastening sleeve 10 is engaged with the groove at the bottom of the sleeve connecting seat 9 through the engaging head seat, which is easy to disassemble and assemble. Fastening sleeves 10 of different specifications and quantities can be replaced according to the type of bolt and the number of fastenings, so that the device can meet the fastening and torque detection requirements of bolts of different specifications, greatly improving the flexibility of the device.

[0032] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

Claims

1. A bolt torque detection device for a bolt tensioner, comprising a detection mechanism for measuring the tightening of a bolt on an upper portion of a tensioner body (1), characterized in that: The detection mechanism comprises a housing assembly and a drive assembly, the housing assembly comprises a mounting housing (2) and a mounting cover (3), and the drive assembly is mounted inside the mounting housing (2) via the mounting cover (3); The drive assembly comprises a fastening drive column (4), a transmission tooth column (5), an adjustment head column (6), a spring (7), a fastening rotary seat (8), a sleeve connecting seat (9) and a fastening sleeve (10), wherein a plurality of fastening rotary seats (8) are provided, and a plurality of fastening rotary seats (8) are rotatably mounted in an equidistant manner inside the mounting shell seat (2), the transmission tooth column (5) is meshedly mounted between two adjacent fastening rotary seats (8), and the fastening drive column (4) is mounted on one side of the transmission tooth column. (5), the spring (7) moves against the upper part of the fastening rotary seat (8) under the push of the adjusting head column (6), and the connection side of the fastening rotary seat (8) and the sleeve connecting seat (9) are respectively provided with a torque transmission groove (14) and a torque transmission protrusion (15), and the torque transmission groove (14) and the torque transmission protrusion (15) are aligned and engaged with each other under the push of the spring (7), and the fastening sleeve (10) is detachably installed on the lower part of the sleeve connecting seat (9).

2. The bolt torque detection device for a bolt tensioner according to claim 1, characterized in that: The interior of the mounting housing (2) is evenly provided with mounting grooves, the fastening rotary seat (8) and the sleeve connecting seat (9) are concentrically rotatably engaged and installed on the inner side of the mounting grooves, the fastening rotary seat (8) is located on the upper part of the sleeve connecting seat (9), the upper part of the sleeve connecting seat (9) is provided with an annular groove, and the lower part of the fastening rotary seat (8) is provided with an annular convex seat, and the annular convex seat is movably engaged and installed with the annular groove.

3. The bolt torque detection device for a bolt tensioner according to claim 2, characterized in that: The torque transmission embedding groove (14) is evenly opened on the bottom side of the annular convex seat in a circumferential shape, the torque transmission convex block (15) is evenly fixedly installed on the bottom side of the annular embedding groove in a circumferential shape, and the torque transmission convex block (15) is embedded in the inner side of the torque transmission embedding groove (14).

4. The bolt torque detection device for a bolt tensioner according to claim 3, characterized in that: Ceramic top plates (13) are fixed to both the upper and lower sides of the spring (7); a circular ring-shaped protrusion is provided at the bottom of the lower ceramic top plate (13); a circular ring-shaped groove is provided at the upper part of the fastening rotary seat (8); and the circular ring-shaped protrusion is slidably engaged with the inner side of the circular ring-shaped groove.

5. The bolt torque detection device for a bolt tensioner according to claim 4, characterized in that: The circumferential side of the adjusting head column (6) is provided with a torque reference mark, the lower portion of the adjusting head column (6) is fixed with an adjusting screw seat (11), the upper portion of the mounting shell seat (2) is provided with an adjusting screw hole (12), the adjusting screw seat (11) is threadedly mounted on the inner side of the adjusting screw hole (12), and the upper portion of the adjusting head column (6) is provided with a hexagonal recessed hole.

6. The bolt torque detection device for a bolt tensioner according to claim 5, characterized in that: A push post is provided at the bottom of the adjusting screw seat (11), a post embedding groove is provided at the top of the ceramic top plate (13), and the lower end of the push post is embedded in contact with the inner side of the post embedding groove.

7. The bolt torque detection device for a bolt tensioner according to claim 6, characterized in that: A tooth column installation groove is arranged on the side of the installation rotation groove, a support shaft column is fixedly installed inside the tooth column installation groove, the transmission tooth column (5) is rotatably installed on the inner side of the tooth column installation groove through the support shaft column, and a transmission tooth groove is arranged on the circumference of the fastening rotary seat (8), and the transmission tooth column (5) is installed between the two fastening rotary seats (8) through the meshing of the transmission tooth grooves.

8. The bolt torque detection device for a bolt tensioner according to claim 2, characterized in that: The mounting cover (3) is fixedly mounted on the upper opening side of the mounting housing (2) by means of bolts, the lower part of the fastening drive column (4) movably penetrates the mounting cover (3), the lower part of the fastening drive column (4) is fixedly connected to the upper part of the middle transmission gear column (5) via a shaft column, and the upper part of the fastening drive column (4) is provided with a hexagonal drive hole.

9. The bolt torque detection device for a bolt tensioner according to claim 8, characterized in that: The fastening sleeve (10) corresponds to the distribution position of the bolts on the upper part of the stretcher body (1); a docking slot is provided at the lower part of the sleeve connection seat (9); a docking plug is fixed at the upper part of the fastening sleeve (10); the docking plug is inserted and installed on the inner side of the docking slot; a ball head protrusion is provided on the side of the docking plug, and the ball head protrusion is inserted and connected with the limiting groove on the inner side of the docking slot.

10. The method for using the bolt torque detection device of the bolt tensioner according to any one of claims 1 to 9, characterized in that: The steps are: (1) When using, select the appropriate specification of the fastening sleeve according to the bolt model; (2) After the bolt is stretched by the tensioner body, the fastening sleeve is placed on the end of the bolt, and then the fastening sleeve and the sleeve connector are docked and installed by alignment and engagement; (3) Then firmly install the shell base and use a hexagonal wrench to turn the adjustment head column. According to the torque reference mark on the upper part of the adjustment head column, adjust and set the tightening torque of the bolt; (4) When the adjusting head column is turned, the thread feed action is performed through the adjusting screw seat at the lower part of the adjusting head column and the adjusting screw hole at the lower part of the installation cover, and the ceramic top plate on the upper part of the spring is pushed by pushing. By changing the compression amount of the spring, the clamping force between the fastening seat and the sleeve connection seat is changed, and the control and adjustment of the tightening torque is completed; (5) After completion, align the head of the hexagonal wrench or electric wrench and insert it into the hexagonal hole on the upper part of the fastening drive column, and then drive the fastening drive column to rotate. Under the drive of the fastening drive column, the transmission tooth column drives multiple fastening rotary seats to rotate synchronously through meshing transmission. The fastening rotary seats transmit the torque to the socket connection seat below through the slot block engagement transmission, and the socket connection seat drives the fastening socket to tighten the bolt; (6) When the set torque is reached, the torque transmission protrusion is disengaged from the torque transmission groove under the action of the torque and pushes up the fastening seat; (7) The tightening seat and the sleeve connection seat are separated, the torque transmission is lost and the tightening operation is stopped. The user will hear a rhythmic clicking sound when the slot block is pulled out, completing the tightening and torque measurement operation of the bolt.

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