Device for detecting tightening degree of scaffold fastener

Abstract

The utility model relates to the technical field of scaffold detection tools, and discloses a device for detecting the tightening degree of a scaffold fastener, which comprises a piezoelectric ceramic sensor, a control module, a sleeve and a middle part integrally formed in the sleeve, the middle part divides the sleeve into a mounting cavity and a detection cavity; the piezoelectric ceramic sensor is connected into the detection cavity and used for detecting a voltage change signal when the middle part and the fastener body are extruded, and the end, away from the middle part, of the piezoelectric ceramic sensor protrudes out of the sleeve; the control module is connected in the mounting cavity and electrically connected with the piezoelectric ceramic sensor, and the control module calculates the tightening torque of the scaffold fastener according to a voltage change signal collected by the piezoelectric ceramic sensor. The scaffold fastener tightening torque detection device solves the problems that in the prior art, when a scaffold fastener tightening torque detection device is used for detection, operability is poor, and internal structural components are prone to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of scaffold detection tooling, in particular to a device for detecting the tightening degree of scaffold fasteners. Background Art

[0002] Scaffolding is widely used in construction scenarios such as building exterior wall construction, building interior loading and unloading, and stage setting. When in use, a temporary structure built on the scaffolding provides a working platform for workers to carry out construction. At present, the structure of the scaffolding mainly includes a base, a pad, vertical poles, cross bars, and fasteners for fixing the vertical poles and cross bars, wherein the vertical poles are arranged vertically and the cross bars are arranged horizontally, and the fasteners are connected to the connection position of the vertical poles and cross bars. In the prior art, according to the setting form of the fasteners, there are mainly three types: right-angle fasteners, rotating fasteners, and butt fasteners. However, during the fixing process, the fasteners are generally used to lock the cross bars, vertical poles, etc. with fastener bolts.

[0003] In order to ensure the stability of the connection, according to relevant technical specifications, the tightening torque of the fastener bolts should not be less than 40N·m and should not be greater than 65N·m. However, during the actual construction and erection process, the tightening degree of the fastener bolts is determined based on the experience of the construction personnel, which can easily cause the fastener locking to not meet the requirements and create safety hazards. In order to reduce the situation of non-compliance with the specifications during the fastener installation process, a variety of detection tools and detection and monitoring methods have appeared on the market, which are used to detect and monitor whether the fasteners are correct and safe and whether they are within the safe use range. For example, the invention patent with publication number CN114061820A discloses a monitoring device and monitoring method for the tightening torque of scaffold fasteners. By setting a monitoring device that cooperates with the fastener bolts, it detects whether the fasteners meet the installation requirements, and monitors the fasteners in key positions during the use of the scaffold, effectively improving the safety of construction.

[0004] During the installation of the fasteners in the above patent, the entire detection device needs to be set between the fastener nut and the fastener body, and then the fastener nut is rotated to tighten the fastener nut and the fastener screw. During the rotation, the fastener nut squeezes the information acquisition module (i.e., the piezoelectric ceramic sensor). The piezoelectric ceramic sensor is pressurized to collect the voltage change information when the fastener nut squeezes the bottom of the groove, and transmits the voltage change information to the control module. The control module calculates the tightening torque of the scaffolding fastener based on the voltage change information collected by the information acquisition module, thereby realizing the detection of the tightening torque of the fastener. Although this patent can complete the detection and monitoring of the fastener tightening torque, the following problems still exist in the actual application process: during the detection process, since the fastener nut is located in the receiving groove, the space of the receiving groove is small and it is not convenient to rotate the fastener nut, which makes the tightening process of the fastener nut inconvenient, affecting the operability and detection efficiency of the detection; in addition, the entire control module is located between the fastener and the fastener nut. During the tightening process of the fastener nut, if the tightening force of the fastener nut is too large, it will cause the upper cover plate to deform and be damaged. At this time, the fastener nut may directly squeeze the control module and damage the control module, causing unnecessary losses. Therefore, it is necessary to improve the existing detection device to improve the operability of the detection device during the tightening torque detection process and enhance the safety of the internal structural components. Utility Model Content

[0005] The utility model aims to provide a device for detecting the tightening degree of scaffold fasteners, so as to solve the problems in the prior art of poor operability and easy damage to internal structural components when using the scaffold fastener tightening torque detection device for detection.

[0006] To solve the above problems, the present invention adopts the following technical solutions: a device for detecting the tightening degree of scaffolding fasteners, including a piezoelectric ceramic sensor and a control module, and also including a sleeve and an intermediate part integrally formed in the sleeve, wherein the intermediate part is provided with an internal thread that cooperates with the fastener screw along the axial direction of the sleeve, and the intermediate part divides the sleeve into an installation cavity and a detection cavity; the piezoelectric ceramic sensor is connected to the detection cavity, and the piezoelectric ceramic sensor is used to detect the voltage change signal when the intermediate part and the fastener body are squeezed, and the end of the piezoelectric ceramic sensor away from the intermediate part protrudes out of the sleeve; the control module is connected to the installation cavity and the control module is electrically connected to the piezoelectric ceramic sensor, and the control module calculates the tightening torque of the scaffolding fastener based on the voltage change signal collected by the piezoelectric ceramic sensor.

[0007] The principles of this program are:

[0008] In the present application, a sleeve is provided and an intermediate portion is integrally formed in the sleeve, an internal thread of the fastener screw is provided in the middle portion, and the internal thread passes through the middle portion along the axial direction of the sleeve. Therefore, in actual use, the middle portion can play the role of the fastener nut in the prior art. Therefore, during the tightening and tightening torque detection process, it is only necessary to rotate the entire sleeve to complete the installation of the fastener, which is simpler in structure. In addition, the middle part in the present application divides the internal space of the sleeve into an installation cavity and a detection cavity located at both ends of the middle part, the piezoelectric ceramic sensor is arranged in the detection cavity, and the control module is arranged in the installation cavity. During the tightening process, the detection cavity is located between the middle part and the fastener body. Since one end of the piezoelectric ceramic sensor in the detection cavity protrudes out of the sleeve, during the tightening process of the rotating sleeve, the end of the piezoelectric ceramic sensor protruding from the sleeve first contacts the fastener body. As the sleeve continues to rotate and tighten, the piezoelectric ceramic sensor located between the fastener body and the middle part is subjected to increasing extrusion force. During this process, the piezoelectric ceramic sensor will transmit the voltage change signal when the middle part and the fastener body are squeezed to the control module. The control module calculates the tightening torque of the scaffolding fastener based on the voltage change signal, and the entire detection process is more direct.

[0009] In addition, in the present application, since the control module is arranged in the installation cavity, during the process of rotating the tightening sleeve, the control module is located on the end of the sleeve away from the fastener body. Therefore, during the rotation of the sleeve, the force generated during the tightening process will not be transmitted to the control module. Even if the tightening torque is too large, the control module in the installation cavity will not be at risk of being squeezed and damaged, thereby ensuring the safety of the control module in use.

[0010] The beneficial effects of this program are:

[0011] 1. Tightening torque detection is more operable: Compared with the prior art, which requires tightening the fastener nut in the receiving groove during the tightening process, the space of the receiving groove is small, making the tightening process difficult to operate and possibly causing damage to the internal structure of the detection device during the tightening process. In this application, by providing a sleeve and an intermediate part, the intermediate part is directly used as a fastener nut, which not only reduces the part features, but also the intermediate part and the sleeve are integrally formed, and the connection between the intermediate part and the sleeve is stable. When tightening, only the sleeve needs to be rotated, and the tightening process is more convenient to operate, so that the tightening process can be completed quickly and stably, effectively improving the efficiency of scaffolding installation and detection.

[0012] 2. The detection device is safer: In this application, since the control module is located on the end of the sleeve away from the fastener body during the sleeve tightening and tightening torque detection process, the piezoelectric ceramic sensor used only for pressure detection is located between the middle part and the fastener body, thereby completely avoiding the risk of the control module being squeezed and damaged during the tightening detection process, and effectively improving the safety of the detection components during the detection process of the detection device.

[0013] Preferably, as an improvement, a sealing end cover is fixedly connected to one end of the sleeve where the installation cavity is set, and a protrusion is fixedly connected to the side of the sealing end cover facing the installation cavity, and an upper through hole is opened on the protrusion along the axial direction of the sleeve for the fastener screw to pass through; an annular installation space is provided between the protrusion and the inner wall of the sleeve, and the control module is connected in the annular installation space.

[0014] In this solution, a sealing end cover is used to seal the end of the sleeve away from the fastener body, and the control module is connected to the annular installation space surrounded by the raised portion and the inner wall of the sleeve, so that the control module is in a relatively sealed environment, which effectively protects the control module. The setting of the raised portion avoids contact friction with the control module when the fastener screw passes through the installation cavity, further improving the protection effect of the control module and allowing the control module to work more stably.

[0015] Preferably, as an improvement, an annular circuit board is provided in the annular installation space, the annular circuit board is fixedly connected to the sealing end cover, and the control module is fixed on the annular circuit board.

[0016] In this solution, the annular circuit board is fixedly connected to the side of the sealing end cover facing the installation cavity, and the control module is arranged on the annular circuit board, so that the control module can work more stably.

[0017] Preferably, as an improvement, the raised portion is in contact with the middle portion, and a sealing ring is fixedly connected between the raised portion and the middle portion.

[0018] In this solution, the length of the raised portion extended to the installation cavity is extended to offset the middle portion, and a sealing ring is fixedly connected between the raised portion and the middle portion. Therefore, after the sealing end cover is fixed, the annular installation space enclosed by the raised portion and the inner wall of the sleeve is in a sealed state, preventing rainwater, dust, etc. from the external environment from entering the annular installation space and affecting the operation of the control module, thereby further improving the stability of the control module and the safety of the detection device.

[0019] Preferably, as an improvement, a limiting end cover is fixedly connected to one end of the sleeve where the detection chamber is set, and a lower through hole coaxially arranged with the sleeve is opened on the limiting end cover; an intermediate sleeve is connected to the sleeve, and an intermediate through hole is provided in the intermediate sleeve for the fastener screw to pass through, and the outer wall of the intermediate sleeve has a small diameter section and a large diameter section, and the large diameter section is located between the piezoelectric ceramic sensor and the limiting end cover, and the end of the small diameter section away from the large diameter section passes through the lower through hole and extends to the outside of the sleeve.

[0020] In this solution, an intermediate sleeve is connected to the sleeve. When in use, the intermediate sleeve is located between the piezoelectric ceramic sensor and the fastener body. The intermediate sleeve is used to transmit the extrusion force applied during the tightening process to the piezoelectric ceramic sensor, and then the piezoelectric ceramic sensor is used to detect the voltage change signal. Due to the setting method of this solution, the piezoelectric ceramic sensor can be completely set in the detection cavity. Without affecting the detection accuracy, the piezoelectric ceramic sensor is protected, reducing the risk of the piezoelectric ceramic sensor being exposed and damaged; in addition, in this solution, the outer wall of the intermediate sleeve is set to two sections, a large diameter section and a small diameter section. By utilizing the limiting effect of the limiting end cover, only the small diameter section is allowed to protrude out of the sleeve and contact the fastener body, thereby avoiding the piezoelectric ceramic sensor and the intermediate sleeve from being detached from the detection cavity during use, thereby improving the stability of the entire detection device during use.

[0021] Preferably, as an improvement, an insulating gasket is provided between the intermediate sleeve and the piezoelectric ceramic sensor, the outer diameter of the insulating gasket is larger than the outer diameter of the piezoelectric ceramic sensor, and the outer diameter of the insulating gasket is smaller than the inner diameter of the detection cavity.

[0022] During the actual inspection process, the sleeve needs to be rotated. When the small-diameter section of the intermediate sleeve contacts and compresses the fastener body, as the sleeve continues to rotate, the intermediate sleeve and the fastener body may rotate relative to each other while the compressive force continues to increase. At the same time, the intermediate sleeve and the piezoelectric ceramic sensor may also rotate relative to each other. If the intermediate sleeve and the piezoelectric ceramic sensor rotate relative to each other, it may damage the piezoelectric ceramic sensor. In this solution, an insulating gasket is provided between the intermediate sleeve and the piezoelectric ceramic sensor to cushion and protect the piezoelectric ceramic sensor, and to minimize wear on the piezoelectric ceramic sensor during sleeve rotation.

[0023] Preferably, as an improvement, a wire hole is opened on the middle part, one end of the wire hole is connected to the installation cavity, and the other end is connected to the detection cavity.

[0024] In this solution, a wire hole is directly opened on the middle part so that the control module and the piezoelectric ceramic sensor can be electrically connected through signal lines and the like.

[0025] Preferably, as an improvement, an isolation sleeve extending into the detection cavity is provided on the middle portion, and an isolation space is formed between the isolation sleeve and the inner wall of the detection cavity. The piezoelectric ceramic sensor, insulating gasket and the large diameter section of the middle sleeve are all located in the isolation space.

[0026] In this solution, an isolation space is formed between the isolation sleeve and the inner wall of the detection cavity, and the piezoelectric ceramic sensor, insulating gasket and the large diameter section of the intermediate sleeve are all located in the isolation space, avoiding contact between the fastener screw and the piezoelectric ceramic sensor, insulating gasket and the large diameter section of the intermediate sleeve during the rotation of the sleeve. On the one hand, it protects the piezoelectric ceramic sensor, insulating gasket and the large diameter section of the intermediate sleeve, and on the other hand, it avoids friction between the fastener screw and the insulating gasket and the intermediate sleeve, which may affect the accuracy of the tightening torque detection.

[0027] Preferably, as an improvement, the outer wall of the sleeve is fixedly connected with a reinforcement portion, the reinforcement portion is located outside the middle portion, and at least two locking clamping surfaces arranged opposite to each other are provided on the outer wall of the reinforcement portion.

[0028] In this solution, a reinforcement portion is used to structurally reinforce the outer wall of the sleeve, and the reinforcement portion is located on the outside of the middle portion, so that the position where the middle portion is set is structurally reinforced in a targeted manner, so that the middle portion can be more stably matched with the fastener screw; at the same time, a locking clamping surface is provided on the reinforcement portion, which is convenient for clamping the sleeve and rotating the sleeve using auxiliary tools in the existing technology, and after the reinforcement portion is provided, the sleeve is not easily deformed during the process of clamping and rotating the sleeve, thereby ensuring stable rotation and tightening.

[0029] Preferably, as an improvement, an alarm is connected to the sealing end cover, and the alarm is electrically connected to the control module.

[0030] In this solution, an alarm is set on the sealing end cover. When the tightening torque of the scaffolding fastener exceeds the standard threshold range, the control module controls the alarm to sound an alarm to remind construction workers that the fastener installation does not meet the requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of Example 1 of the present utility model.

[0032] Figure 2 for Figure 1 Cross-sectional view along AA.

[0033] Figure 3 This is an exploded view of a hidden fastener screw according to embodiment 1 of the present invention.

[0034] Figure 4 The same as in the second embodiment of the present invention Figure 1 Cross-sectional view along AA position.

[0035] Figure 5 This is a schematic diagram of the third embodiment of the present invention. DETAILED DESCRIPTION

[0036] The following is further described in detail through specific implementation methods:

[0037] The figure marks in the drawings of the specification include: sleeve 1, locking clamping surface 101, middle part 2, fastener screw 3, piezoelectric ceramic sensor 4, control module 5, wire hole 6, fastener body 7, sealing end cover 8, annular installation space 9, annular circuit board 10, power supply module 11, alarm 12, sealing ring 13, limit end cover 14, intermediate sleeve 15, large diameter section 1501, small diameter section 1502, insulating gasket 16, isolation sleeve 17, reinforcement part 18.

[0038] Example 1

[0039] This embodiment is as shown in the attached Figure 1 and Figure 2 As shown: A device for detecting the tightening degree of scaffolding fasteners includes a sleeve 1 and an intermediate portion 2 integrally formed in the sleeve 1. Two locking clamping surfaces 101 arranged opposite each other are provided on the outer wall of the sleeve 1, so that the sleeve 1 can be clamped and driven to rotate by a tightening tool; the intermediate portion 2 is located in the middle position of the sleeve 1, and the intermediate portion 2 divides the internal space of the sleeve 1 into an installation cavity and a detection cavity, and an internal thread is coaxially provided in the intermediate portion 2 along the axial direction of the sleeve 1. The internal thread passes through the intermediate portion 2 and the internal thread is used to threadably cooperate with the fastener screw 3 in the prior art. When in use, the intermediate portion 2 in the sleeve 1 is threadedly connected to the fastener screw 3 in the prior art, and the detection cavity is located between the intermediate portion 2 and the fastener body 7 in the prior art.

[0040] Combine Figure 1 and Figure 2 A piezoelectric ceramic sensor 4 is installed in the detection cavity, and a control module 5 is connected to the mounting cavity. The control module 5 and the piezoelectric ceramic sensor 4 are electrically connected. A wire hole 6 is formed in the middle portion 2, one end of which is connected to the mounting cavity and the other end is connected to the detection cavity, so that the control module 5 and the piezoelectric ceramic sensor 4 can be electrically connected via a signal line. The piezoelectric ceramic sensor 4 is used to detect the voltage change signal during the tightening and extrusion process between the middle portion 2 and the fastener body 7. The control module 5 calculates the tightening torque of the scaffolding fastener based on the voltage change signal collected by the piezoelectric ceramic sensor 4.

[0041] Specifically, when the piezoelectric ceramic sensor 4 is subjected to compression, it undergoes mechanical deformation, generating an electric field. When the degree of tightening changes, the degree of mechanical deformation of the piezoelectric ceramic sensor 4 changes, and the generated electric field signal changes. Therefore, based on the electric field change signal generated by the piezoelectric ceramic sensor 4, the degree of tightening of the middle portion 2 can be obtained, and the degree of change in the tightening torque of the scaffolding fastener can be obtained. In addition, the control module 5 in this embodiment is a single-chip microcomputer, including an A / D conversion unit and a calculation unit. The A / D conversion unit is used to convert the voltage signal into a digital signal that can be recognized by the calculation unit, and the calculation unit is used to calculate based on the digital signal to obtain the tightening torque of the scaffolding fastener. Since the use of the piezoelectric ceramic sensor 4 for detection and the control module 5 for calculation to obtain the tightening torque are prior art, the details can be referred to the description of the invention with publication number CN114061820A and the invention titled "A Monitoring Device and Method for the Tightening Torque of Scaffolding Fasteners", which will not be repeated in this embodiment.

[0042] Combine Figure 2 and Figure 3 In order to make the control module 5 operate more stably, in this embodiment, a sealing end cap 8 is fixedly connected to the end of the sleeve 1 near the installation cavity by bonding, welding or screwing. The sealing end cap 8 has a cylindrical protrusion integrally formed on the side facing the installation cavity. The center of the protrusion has an upper through hole extending axially along the sleeve 1, through which the fastener screw 3 can pass. The end of the protrusion contacts the middle part 2, and an annular installation space 9 is formed between the outer wall of the protrusion and the inner wall of the sleeve 1. The side of the sealing end cap 8 facing the installation cavity is fixedly connected to an annular circuit board 10 by screws. The annular circuit board 10 is sleeved on the outer wall of the protrusion and is located in the annular installation space 9. The control module 5 is mounted on the annular circuit board 10.

[0043] At the same time, in order to enable the entire device to operate independently for a long time, in this embodiment, a power supply module 11 is connected to the annular circuit board 10, and an alarm 12 is connected to the end face of the sealing cover plate facing outside the installation cavity. The alarm module is electrically connected to the control module 5. When the pressure borne by the piezoelectric ceramic sensor 4 is not within the preset range, the control module 5 controls the alarm 12 to sound an alarm. The alarm 12 can use sound and / or light to realize the alarm. The preset range value borne by the piezoelectric ceramic sensor 4 is determined according to the tightening torque range value of the fastener, wherein the preset threshold range of the tightening torque of the fastener is preferably 40N·m~65N·m. The calculation formula of the pressure borne by the piezoelectric ceramic sensor 4 and the tightening torque of the fastener is T=kdF, wherein T is the tightening torque, k is the torque coefficient, d is the nominal diameter of the internal thread on the middle part 2, and F is the pressure borne by the piezoelectric ceramic sensor 4. Its calculation formula is similar to the calculation method of the invention patent with publication number CN114061820A, and will not be described in detail here.

[0044] The piezoelectric ceramic sensor 4, the control module 5 and the alarm 12 are all electrically connected to the power supply module 11, and the power supply module 11 is used to power the piezoelectric ceramic sensor 4 and the control module 5; of course, a power switch and a charging socket can also be installed on the outer wall of the sleeve 1 ( Figure 3 (not shown) The power switch controls the opening and closing of the entire device, while the charging module is charged via the charging socket. The specific structure and connection method of the power switch and charging socket are not detailed here. In addition, a circular sealing ring 13 is clamped onto the end of the raised portion. The sealing ring 13 seals the contact point between the raised portion and the middle portion 2, thereby maintaining an airtight annular installation space 9 and preventing external dust and water from entering the annular installation space 9 and damaging the electronic components.

[0045] Combine Figure 1 and Figure 2 The end of the sleeve 1 where the detection cavity is set is fixedly connected to the limit end cover 14 by bonding, welding or screwing. The limit end cover 14 has a lower through hole coaxially arranged with the sleeve 1, and the sleeve 1 is connected to the intermediate sleeve 15. An insulating gasket 16 is provided between the intermediate sleeve 15 and the piezoelectric ceramic sensor 4. The outer diameter of the insulating gasket 16 is larger than the outer diameter of the piezoelectric ceramic sensor 4, and the outer diameter of the insulating gasket 16 is smaller than the inner diameter of the detection cavity. Figure 3The intermediate sleeve 15 has a large diameter section 1501 and a small diameter section 1502, and an intermediate through hole is opened in the intermediate sleeve 15 along the axial direction of the sleeve 1 for the fastener screw 3 to pass through. The large diameter section 1501 is located between the piezoelectric ceramic sensor 4 and the limiting end cover 14, and the end of the small diameter section 1502 away from the large diameter section 1501 passes through the lower through hole and extends to the outside of the sleeve 1 and then contacts the fastener body 7. Under the limiting action of the limiting end cover 14, the large diameter section 1501 of the intermediate sleeve 15 is limited in the detection cavity, preventing the intermediate sleeve 15, the insulating gasket 16 and the piezoelectric ceramic sensor 4 from falling out of the detection cavity during use, thereby ensuring the stability of the detection. Specific implementation method:

[0047] When the device of this embodiment is used to tighten the scaffolding fastener, the fastener body 7 and the fastener screw 3 are connected to the predetermined position of the vertical pole in the prior art, and then the fastener screw 3 is passed through the intermediate sleeve 15 and the insulating gasket 16 and contacts the internal thread of the middle part 2. Then, the sleeve 1 is clamped and rotated using the clamping tool in the prior art, so that the fastener screw 3 is threadedly fixed to the internal thread of the middle part 2, and as the sleeve 1 continues to rotate, the small diameter section 1502 of the intermediate sleeve 15 gradually approaches the fastener body 7. And it is against the fastener body 7. As the pressing force between the small diameter section 1502 of the intermediate sleeve 15 and the fastener body 7 gradually increases, the intermediate sleeve 15 will be subjected to the extrusion force of the fastener body 7 and transmitted in reverse through the insulating gasket 16 to the piezoelectric ceramic sensor 4. The piezoelectric ceramic sensor 4 is subjected to pressure and collects voltage change signals, and transmits the collected voltage change signals to the control module 5. After receiving the voltage change signals, the control module 5 calculates the tightening torque of the fastener, thereby detecting the tightening degree of the scaffolding fastener.

[0048] In this embodiment, during the detection and fastener locking process, the sleeve 1 and the middle part 2 can be used as the fastener nut in the prior art, thereby effectively reducing the part features, making the fastener connection and detection costs lower, and during detection, only the sleeve 1 needs to be rotated, which is very convenient to operate and can effectively improve the detection efficiency; in addition, the control module 5 and the like in this embodiment are all located in the annular installation space 9, and will not cause extrusion damage to the electrical components in the annular installation space 9 during the fixing and detection process, so that the entire device can operate stably for a long time, effectively improving the safety protection effect of electrical components.

[0049] Example 2

[0050] The difference between the second embodiment and the first embodiment is that: Figure 4As shown, the middle part 2 has an isolation sleeve 17 integrally formed at one end facing the detection cavity, which extends into the detection cavity. The isolation sleeve 17 is in the shape of an annular sleeve, and an isolation space is enclosed between the isolation sleeve 17 and the inner wall of the detection cavity. The piezoelectric ceramic sensor 4, the insulating gasket 16 and the large diameter section 1501 of the middle sleeve 15 are all located in the isolation space, so that when the fastener screw 3 is inserted into the middle through hole and connected to the internal thread, the fastener screw 3 is prevented from contacting with the electric ceramic sensor, the insulating gasket 16, etc. during the tightening process, which not only improves the stability during the tightening process and protects the electric ceramic sensor and the insulating gasket 16, but also prevents the fastener screw 3 from contacting with the electric ceramic sensor and the insulating gasket 16 to generate friction and affect the accuracy of the detection.

[0051] Example 3

[0052] The difference between the third embodiment and the first embodiment is that: Figure 5 As shown, in this embodiment, a reinforcement portion 18 is integrally formed on the outer wall of the sleeve 1, the reinforcement portion 18 is located on the outside of the middle portion 2, and the length of the reinforcement portion 18 along the axial direction of the sleeve 1 is equal to the length of the middle portion 2, and the locking clamping surface 101 is arranged on the outer wall of the reinforcement portion 18, and the number of the locking clamping surfaces 101 is three pairs, so that the outer wall of the reinforcement portion 18 is a regular hexagon, which makes it more convenient to clamp during the clamping process.

[0053] In this embodiment, the reinforcement portion 18 is used to specifically reinforce the structure of the outer side of the middle portion 2 to improve the stability of the structure of the sleeve 1. When clamping the sleeve 1, since the reinforcement portion 18 protrudes from the outer wall of the sleeve 1, the locking clamping surface 101 on the reinforcement portion 18 can be conveniently and accurately clamped, and then force is applied to rotate the sleeve 1, making the rotation and tightening process more stable. At the same time, it avoids deformation of the sleeve 1 caused by clamping the outer side of the installation cavity or the detection cavity, thereby reducing the risk of internal electrical components of the sleeve 1 being squeezed and damaged.

[0054] The above description is merely an embodiment of the present invention, and the commonly known specific technical solutions and / or features of the solution are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several variations and improvements can be made, which should also be considered as the scope of protection of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection claimed in this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A device for detecting the tightening degree of scaffold fasteners, comprising a piezoelectric ceramic sensor and a control module, characterized in that: It also includes a sleeve and an intermediate part integrally formed in the sleeve, an internal thread cooperating with the fastener screw is provided in the intermediate part along the axial direction of the sleeve, and the intermediate part divides the sleeve into an installation cavity and a detection cavity; the piezoelectric ceramic sensor is connected to the detection cavity, and the piezoelectric ceramic sensor is used to detect the voltage change signal when the intermediate part and the fastener body are squeezed, and the end of the piezoelectric ceramic sensor away from the intermediate part protrudes out of the sleeve; the control module is connected to the installation cavity and the control module is electrically connected to the piezoelectric ceramic sensor, and the control module calculates the tightening torque of the scaffolding fastener based on the voltage change signal collected by the piezoelectric ceramic sensor.

2. The device for detecting the tightening degree of scaffold fasteners according to claim 1, characterized in that: A sealing end cover is fixedly connected to one end of the sleeve where the installation cavity is set, and a protrusion is fixedly connected to the side of the sealing end cover facing the installation cavity. An upper through hole for the fastener screw to pass through is opened on the protrusion along the axial direction of the sleeve; an annular installation space is provided between the protrusion and the inner wall of the sleeve, and the control module is connected in the annular installation space.

3. The device for detecting the tightening degree of scaffold fasteners according to claim 2, characterized in that: An annular circuit board is provided in the annular installation space. The annular circuit board is fixedly connected to the sealing end cover. The control module is fixed on the annular circuit board.

4. The device for detecting the tightening degree of scaffold fasteners according to claim 2, characterized in that: The raised portion is in contact with the middle portion, and a sealing ring is fixedly connected between the raised portion and the middle portion.

5. The device for detecting the tightening degree of scaffold fasteners according to claim 2, characterized in that: The sleeve is fixedly connected to a limiting end cover at one end where the detection cavity is set, and the limiting end cover is provided with a lower through hole coaxially arranged with the sleeve; an intermediate sleeve is connected to the sleeve, and an intermediate through hole is provided in the intermediate sleeve for the fastener screw to pass through, and the outer wall of the intermediate sleeve has a small diameter section and a large diameter section, and the large diameter section is located between the piezoelectric ceramic sensor and the limiting end cover, and the end of the small diameter section away from the large diameter section passes through the lower through hole and extends to the outside of the sleeve.

6. The device for detecting the tightening degree of scaffold fasteners according to claim 5, characterized in that: An insulating gasket is provided between the intermediate sleeve and the piezoelectric ceramic sensor. The outer diameter of the insulating gasket is larger than the outer diameter of the piezoelectric ceramic sensor, and the outer diameter of the insulating gasket is smaller than the inner diameter of the detection cavity.

7. The device for detecting the tightening degree of scaffold fasteners according to claim 2, characterized in that: A wire passing hole is provided on the middle portion, one end of the wire passing hole is communicated with the installation cavity, and the other end is communicated with the detection cavity.

8. The device for detecting the tightening degree of scaffold fasteners according to claim 6, characterized in that: The middle portion is provided with an isolation sleeve extending into the detection cavity, and an isolation space is enclosed between the isolation sleeve and the inner wall of the detection cavity. The piezoelectric ceramic sensor, the insulating gasket and the large diameter section of the middle sleeve are all located in the isolation space.

9. The device for detecting the tightening degree of scaffold fasteners according to claim 2, characterized in that: The outer wall of the sleeve is fixedly connected with a reinforcement portion, the reinforcement portion is located outside the middle portion, and at least two locking clamping surfaces arranged opposite to each other are provided on the outer wall of the reinforcement portion.

10. The device for detecting the tightening degree of scaffold fasteners according to any one of claims 2 to 9, characterized in that: The sealing end cover is connected with an alarm, and the alarm is electrically connected to the control module.

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