CN104972423A - Bolt screwing detection method, device and system and hydraulic wrench - Google Patents

Abstract

The invention provides a bolt fastening detection method, device, system and hydraulic wrench. The method for detecting bolt fastening includes: obtaining state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process; and determining whether the bolt fastening is qualified according to the state data of the pressure changing with time. The bolt fastening detection method, device, system and hydraulic wrench provided by the present invention determine whether the bolt fastening is qualified according to the obtained state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process, without the need for quality inspection personnel to supervise the bolts throughout the process The fastening process can realize the detection of bolt fastening, which reduces labor costs and management costs.

Description

Bolt fastening detection method, device, system and hydraulic wrench

technical field

The invention relates to the field of mechanical technology, in particular to a bolt fastening detection method, device, system and hydraulic wrench.

Background technique

At present, in the on-site installation of large-scale machinery (such as wind power generators), the installation of major components is connected by a large number of high-strength bolts of different specifications. The manufacturer provides on-site installation technical guidance, high-strength bolt construction technology and technical requirements, and the operator of the installation unit uses a hydraulic wrench to tighten the high-strength bolts according to the high-strength bolt construction technology and technical requirements.

Fig. 1 is a structural schematic diagram of an existing hydraulic wrench. As shown in FIG. 1 , a mechanical pointer pressure gauge 12 is installed on the hydraulic pump 11 for detecting the pressure value in the oil pipe 13 , thereby indirectly detecting the torque value of the hydraulic wrench head 14 . The hydraulic pump 11 drives the hydraulic wrench head 14 to fasten the bolt 15 through the oil pipe 13 . However, during the construction process, the installation unit often fails to fasten the bolts according to the process and technical requirements stipulated by the manufacturer due to equipment reasons or the quality of the operators. There are usually the following problems: 1. Mechanical pointer pressure gauges, low resolution and slow response speed , low precision; 2. The operator did not tighten the bolts twice or three times in strict accordance with the process requirements specified by the manufacturer, but tightened the bolts less than the number of times required by the process; 3. The operator did not strictly follow the manufacturer's requirements When tightening the bolts with a certain torque value, there is a problem of under-tightening or over-tightening. During bolt fastening and maintenance, the bolt fastening is generally checked through process sampling and final acceptance. However, the above problems, especially the problems of bolt overtightening and bolt tightening times, cannot be detected or are inconvenient during process sampling and final acceptance. detected.

In the prior art, in order to ensure the construction quality of bolt fastening, quality inspectors are usually required to supervise the whole process of bolt fastening, which increases labor costs and management costs.

Contents of the invention

The embodiment of the present invention provides a bolt fastening detection method, device, system and hydraulic wrench, which can realize the detection of bolt fastening without the need for quality inspection personnel to supervise the whole process of bolt fastening, reducing labor costs and management costs .

In order to achieve the above object, embodiments of the present invention adopt the following technical solutions:

The invention provides a bolt fastening detection method, comprising:

Obtain the state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process;

Whether the bolt tightening is qualified or not is determined according to the state data of the pressure over time.

The present invention also provides a bolt fastening detection device, comprising:

The obtaining module is used to obtain the state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process;

A determining module, configured to determine whether the bolt fastening is qualified according to the state data of the pressure over time.

The present invention also provides a hydraulic wrench, including a hydraulic pump, a mechanical pointer pressure gauge, an oil pipe, a hydraulic wrench head and a pressure recorder, wherein:

The hydraulic pump is connected to the hydraulic wrench head through the oil pipe, the mechanical pointer pressure gauge is connected to the hydraulic pump, and the pressure recorder is respectively connected to the oil outlet of the hydraulic pump and the oil pipe ;

The pressure recorder is used to collect the state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process.

The present invention also provides a bolt fastening detection system, including the above-mentioned bolt fastening detection device and the above-mentioned hydraulic wrench, wherein:

The acquisition module in the bolt fastening detection device is connected with the pressure recorder in the hydraulic wrench;

The acquisition module acquires the state data of the pressure of the hydraulic wrench changing with time collected by the pressure recorder during the bolt tightening process.

The bolt fastening detection method, device, system and hydraulic wrench provided by the present invention can determine whether the bolt fastening is qualified according to the obtained state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process, without the need for quality inspectors to supervise the bolts throughout the process The fastening process can realize the detection of bolt fastening, which reduces labor costs and management costs.

Description of drawings

Fig. 1 is the structural representation of existing hydraulic wrench;

Fig. 2 is a schematic flow chart of an embodiment of the bolt fastening detection method provided by the present invention;

3 is a schematic flow chart of another embodiment of the bolt fastening detection method provided by the present invention;

Fig. 4 is a schematic structural view of an embodiment of a bolt fastening detection device provided by the present invention;

5 is a schematic structural view of another embodiment of the bolt fastening detection device provided by the present invention;

Fig. 6 is a structural schematic diagram of an embodiment of a hydraulic wrench provided by the present invention;

FIG. 7 is a schematic structural view of an embodiment of a bolt fastening detection system provided by the present invention;

Among them: 11-hydraulic pump; 12-mechanical pointer pressure gauge; 13-oil pipe; 14-hydraulic wrench head; 15-bolt; 41-obtaining module; 42-determining module; ; 61-pressure recorder; 62-oil outlet; 63-tee oil pipe joint; 71-bolt fastening detection device; 72-hydraulic wrench.

Detailed ways

The bolt fastening detection method, device, system and hydraulic wrench according to the embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Embodiment one

Fig. 2 is a schematic flowchart of an embodiment of a bolt fastening detection method provided by the present invention. As shown in Figure 2, the bolt fastening detection method in this embodiment may specifically include:

S201. Obtain state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process.

Specifically, the state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process can be obtained through the pressure recorder in the hydraulic wrench.

S202. Determine whether the fastening of the bolts is qualified according to the state data of pressure changes over time.

Specifically, the number of pressure rises and falls during the bolt tightening process and the maximum pressure value during each rise and fall can be obtained according to the state data of pressure changes with time, and can be compared with the standard number of pressure rises and falls and each time when the bolt is tightened normally. The standard maximum pressure value during the pressure rise and fall is compared. If consistent, it is determined that the bolt fastening is qualified, and if not, it is determined that the bolt fastening is unqualified.

The bolt fastening detection method in this embodiment determines whether the bolt fastening is qualified according to the obtained state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process, and can be realized without the need for quality inspectors to supervise the bolt fastening process throughout the process The detection of bolt fastening reduces labor costs and management costs.

Embodiment two

Fig. 3 is a schematic flowchart of another embodiment of the bolt fastening detection method provided by the present invention. As shown in FIG. 3 , the bolt fastening detection method in this embodiment provides a specific implementation of the bolt fastening detection method in the embodiment shown in FIG. 2 . The bolt fastening detection method of this embodiment may specifically include:

S301. Obtain state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process.

Specifically, it is the same as step S201 in the embodiment shown in FIG. 2 . The state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process can be obtained through the pressure recorder in the hydraulic wrench.

Step S201 in the embodiment shown in FIG. 2 may specifically include the following steps S302 and S302.

S302. Generate a pressure-time-varying curve or a pressure-versus-time data list according to the status data of pressure-varying time.

Specifically, statistical product and service solutions (Statistical Product and Service Solutions, referred to as SPSS), statistical analysis software (Statistical Analysis System, referred to as SAS) or Microsoft Office software (Microsoft Excel) and other data analysis software can be used. Generate a pressure-versus-time curve or a list of pressure-versus-time data from the status data.

S303. Determine whether the fastening of the bolts is qualified according to the pressure versus time curve or the pressure versus time data list.

Specifically, the number of pressure rises and falls and the maximum pressure value during each rise and fall are obtained according to the generated pressure versus time curve or data list of pressure versus time, and are compared with the standard number of pressure rises and falls when the bolt is normally tightened and each Compare the standard maximum pressure value in the process of the secondary pressure rise and fall, and determine whether the bolt fastening is qualified according to the comparison result. If consistent, it is determined that the bolt fastening is qualified, and if not, it is determined that the bolt fastening is unqualified.

Among them, the standard number of pressure rises and falls when the bolt is normally tightened and the standard maximum pressure value during each pressure rise and fall can be obtained in the following two ways:

As the first feasible implementation mode, if the standard curve of pressure versus time or the standard data list of pressure versus time when the bolt is normally tightened is known, it can be directly based on the standard curve of pressure versus time when the bolt is normally tightened or the pressure The time-varying standard data list acquires the standard number of pressure rises and falls and the standard maximum pressure value during each pressure rise and fall when the bolt is normally tightened.

As a second feasible implementation mode, if the standard curve of pressure versus time or the standard data list of pressure versus time when the bolt is normally tightened is unknown, the standard times of torque rise and fall can be increased according to the bolt manufacturer’s normal tightening torque And the standard maximum torque value during each torque rise and fall process, the standard number of pressure rise and fall and the standard maximum pressure value during each pressure rise and fall process can be obtained by querying the torque comparison table of the hydraulic wrench.

The bolt fastening detection method of this embodiment generates a pressure-time-varying curve or a pressure-versus-time data list based on the obtained status data of the pressure-varying time of the hydraulic wrench during the bolt-fastening process, and generates a pressure-varying time-varying data list based on the generated pressure The data list of the curve or pressure over time determines whether the bolt fastening is qualified, and the bolt fastening detection can be realized without the need for quality inspectors to supervise the bolt fastening process throughout the process, reducing labor costs and management costs.

Embodiment three

Fig. 4 is a schematic structural view of an embodiment of a bolt fastening detection device provided by the present invention. As shown in FIG. 4 , the bolt fastening detection device of this embodiment can implement the bolt fastening detection method of the embodiment shown in FIG. 2 above. Specifically, the bolt fastening detection device in this embodiment may specifically include: an acquisition module 41 and a determination module 42 . in:

The acquiring module 41 is configured to acquire the state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process.

A determining module 42, configured to determine whether the bolt fastening is qualified according to the state data of pressure changes over time.

Specifically, for the specific process of realizing the functions of each module in this embodiment, refer to the relevant description in the embodiment shown in FIG. 2 , which will not be repeated here.

The bolt fastening detection device of this embodiment determines whether the bolt fastening is qualified according to the obtained state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process, and it can be realized without having quality inspectors to supervise the bolt fastening process throughout the process. The detection of bolt fastening reduces labor costs and management costs.

Embodiment four

Fig. 5 is a structural schematic diagram of another embodiment of the bolt fastening detection device provided by the present invention. As shown in Figure 5, the bolt fastening detection device of this embodiment provides a specific structure of the bolt fastening detection device of the embodiment shown in Figure 4, and the bolt fastening detection device of this embodiment can implement the above-mentioned Figure 3 The bolt fastening detection method of the illustrated embodiment. specific:

The acquisition module 41 in the embodiment shown in Figure 4 can be specifically used for:

The state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process is obtained through the pressure recorder in the hydraulic wrench.

Further, the determining module 42 in the embodiment shown in FIG. 4 may specifically include: a generating submodule 51 and a determining submodule 52 . in:

The generation sub-module 51 is used to generate a pressure variation curve with time or a data list of pressure variation with time according to the state data of pressure variation with time.

The determination sub-module 52 is configured to determine whether the bolt fastening is qualified according to the pressure variation curve with time or the pressure variation data list with time.

Further, the generation sub-module 51 can specifically be used for:

According to the state data of pressure changing with time, use SPSS, SAS or Microsoft Excel to generate pressure changing curve or pressure changing data list with time.

Further, the determining submodule 52 may specifically include: a first acquiring unit, a comparing unit, and a determining unit. in:

The first acquisition unit is configured to acquire the number of pressure rises and falls and the maximum pressure value during each rise and fall according to the pressure versus time curve or the pressure versus time data list.

The comparison unit is used to compare the number of pressure rises and falls and the maximum pressure value during each rise and fall with the standard number of pressure rises and falls and the standard maximum pressure value during each pressure rise and fall when the bolt is normally tightened.

Determination unit used to determine whether the bolt fastening is qualified or not based on the comparison result.

Further, the determining submodule 52 may also include: a second acquiring unit.

The second acquisition unit is used to acquire the standard number of times of pressure rise and fall and the standard maximum pressure value during each pressure rise and fall according to the standard curve of pressure change with time or the standard data list of pressure change with time when the bolt is normally tightened.

Further, the determining submodule 52 may also include: a third acquiring unit.

The third acquisition unit is used to obtain the standard number of pressure rises and falls and the standard maximum torque value during each torque rise and fall process by querying the torque comparison table of the hydraulic wrench according to the standard number of torque rises and falls when the bolt is normally tightened. Standard maximum pressure value during pressure rise and fall.

Specifically, for the specific process of each module, sub-module, and unit in this embodiment to realize their functions, refer to the relevant description in the embodiment shown in FIG. 3 , which will not be repeated here.

The bolt fastening detection device in this embodiment generates a pressure-time-varying curve or a list of pressure-versus-time data based on the obtained state data of the pressure-varying time of the hydraulic wrench during the bolt-fastening process, and generates a pressure-varying time-varying data list based on the generated pressure The data list of the curve or pressure over time determines whether the bolt fastening is qualified, and the bolt fastening detection can be realized without the need for quality inspectors to supervise the bolt fastening process throughout the process, reducing labor costs and management costs.

Embodiment five

Fig. 6 is a schematic structural view of an embodiment of the hydraulic wrench provided by the present invention. As shown in FIG. 6 , the hydraulic wrench of this embodiment adds a pressure recorder 61 on the basis of the existing hydraulic wrench (see FIG. 1 ). Specifically, the hydraulic wrench of this embodiment may specifically include: a hydraulic pump 11, a mechanical pointer pressure gauge 12, an oil pipe 13, a hydraulic wrench head 14, and a pressure recorder 61, wherein:

The hydraulic pump 11 is connected to the hydraulic wrench head 14 through the oil pipe 13 , the mechanical pointer pressure gauge 12 is connected to the hydraulic pump 11 , and the pressure recorder 61 is connected to the oil outlet 62 of the hydraulic pump 11 and the oil pipe 13 respectively.

The pressure recorder 61 is used to collect the state data of the pressure of the hydraulic wrench changing with time.

Specifically, the pressure recorder 61 can be respectively connected to the oil outlet 62 of the hydraulic pump 11 and the oil pipe 13 through a three-way oil pipe joint 63 . The mechanical pointer pressure gauge 12 has low resolution, slow response speed and low precision. The pressure recorder 61 has high resolution, fast response, high precision, and has an electronic digital display function, which can display the instantaneous pressure value in real time. The hydraulic pump 11 drives the hydraulic wrench head 14 to fasten the bolt 15 through the oil pipe 13, and the pressure recorder 61 can collect and store the state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process. The testing personnel can determine whether the bolt fastening is qualified according to the state data of the pressure of the hydraulic wrench changing with time collected by the pressure recorder 61. For the specific process, please refer to the relevant content in the embodiment shown in FIG. 2 or FIG. 3 , and will not repeat them here. .

The pressure recorder in the hydraulic wrench of this embodiment can collect the state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process, so that the inspector can obtain the state of the pressure of the hydraulic wrench changing with time during the bolt tightening process. The data determines whether the bolt fastening is qualified, and the inspection of bolt fastening can be realized without the need for quality inspectors to supervise the whole process of bolt fastening, which reduces labor costs and management costs.

Embodiment six

Fig. 7 is a structural schematic diagram of an embodiment of a bolt fastening detection system provided by the present invention. As shown in FIG. 7 , the bolt fastening detection system of this embodiment includes the bolt fastening detection device 71 of the embodiment shown in FIG. 4 or FIG. 5 and the hydraulic wrench 72 of the embodiment shown in FIG. 6 . in:

The acquisition module 41 in the bolt fastening detection device 71 is connected with the pressure recorder 61 in the hydraulic wrench 72 .

The acquiring module 41 acquires the state data of the pressure of the hydraulic wrench changing with time collected by the pressure recorder 61 during the bolt tightening process.

Specifically, the pressure recorder 61 in the hydraulic wrench 72 can collect and store state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process. The acquisition module 41 in the bolt tightening detection device 71 acquires state data of the pressure of the hydraulic wrench changing with time during the bolt tightening process from the pressure recorder 61 . The bolt fastening detection device 71 determines whether the bolt fastening is qualified according to the obtained state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process. The specific process can refer to the relevant content in the embodiment shown in FIG. 2 or FIG. 3 , here I won't repeat them here.

In the bolt fastening detection system of this embodiment, the pressure recorder in the hydraulic wrench collects the state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process. The bolt fastening detection device obtains the state data of the pressure of the hydraulic wrench changing with time during the bolt fastening process from the pressure recorder, and determines whether the bolt fastening is Qualified, the inspection of bolt fastening can be realized without the need for quality inspectors to supervise the whole process of bolt fastening, which reduces labor costs and management costs.

The above is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Anyone familiar with the technical field can easily think of changes or replacements within the technical scope disclosed in the present invention, and should cover all Within the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (18)

1. a bolted detection method, is characterized in that, comprising:

Obtain the time dependent status data of pressure of hydraulic spanner in bolted process;

Whether qualified according to described pressure time dependent status data determination bolted.

2. bolted detection method according to claim 1, is characterized in that, in described acquisition bolted process, the time dependent status data of pressure of hydraulic spanner comprises:

The time dependent status data of described pressure of hydraulic spanner described in bolted process is obtained by the manograph in described hydraulic spanner.

3. bolted detection method according to claim 1, is characterized in that, describedly comprises according to whether described pressure time dependent status data determination bolted is qualified:

Pressure time curve or pressure delta data list is in time generated according to the time dependent status data of described pressure;

According to described pressure time curve or described pressure delta data list in time determination bolted whether qualified.

4. bolted detection method according to claim 3, is characterized in that, describedly generates pressure time curve according to the time dependent status data of described pressure or pressure delta data list in time comprises:

Statistical product and service solution SPSS, statistical analysis software SAS or MS Office Applications MicrosoftExcel is adopted to generate described pressure time curve or the delta data list in time of described pressure according to the time dependent status data of described pressure.

5. bolted detection method according to claim 3, is characterized in that, described according to described pressure time curve or whether described pressure delta data list in time determination bolted is qualified comprises:

The maximum pressure value in pressure increase decline number of times and each ascending and descending process is obtained according to described pressure time curve or the delta data list in time of described pressure;

By the maximum pressure value in described pressure increase decline number of times and described each ascending and descending process respectively with bolt normal fastening time pressure increase decline standard number and each pressure increase decline process in standard maximum pressure value compare;

Whether qualified according to comparative result determination bolted.

6. bolted detection method according to claim 5, is characterized in that, described according to described pressure time curve or whether described pressure delta data list in time determination bolted is qualified also comprises:

According to bolt normal fastening time pressure change calibration curve or pressure in time and change normal data list in time and obtain standard maximum pressure value in described pressure increase decline standard number and described each pressure increase decline process.

7. bolted detection method according to claim 5, is characterized in that, described according to described pressure time curve or whether described pressure delta data list in time determination bolted is qualified also comprises:

According to bolt normal fastening time moment rise and fall standard number and each moment ascending and descending process in standard maximum moment value, obtain the standard maximum pressure value in described pressure increase decline standard number and described each pressure increase decline process by the moment table of comparisons inquiring about described hydraulic spanner.

8. a bolted checkout gear, is characterized in that, comprising:

Acquisition module, the time dependent status data of the pressure for obtaining hydraulic spanner in bolted process;

Whether determination module, for qualified according to described pressure time dependent status data determination bolted.

9. bolted checkout gear according to claim 8, is characterized in that, described acquisition module specifically for:

The time dependent status data of described pressure of hydraulic spanner described in bolted process is obtained by the manograph in described hydraulic spanner.

10. bolted checkout gear according to claim 8, is characterized in that, described determination module comprises:

Generate submodule, for generating pressure time curve or pressure delta data list in time according to the time dependent status data of described pressure;

Determine submodule, for according to described pressure time curve or described pressure delta data list in time determination bolted whether qualified.

11. bolted checkout gears according to claim 10, is characterized in that, described generation submodule specifically for:

SPSS, SAS or MicrosoftExcel is adopted to generate described pressure time curve or the delta data list in time of described pressure according to the time dependent status data of described pressure.

12. bolted checkout gears according to claim 10, is characterized in that, describedly determine that submodule comprises:

First acquiring unit, for obtaining the maximum pressure value in pressure increase decline number of times and each ascending and descending process according to described pressure time curve or the delta data list in time of described pressure;

Comparing unit, for by the maximum pressure value in described pressure increase decline number of times and described each ascending and descending process respectively with bolt normal fastening time pressure increase decline standard number and each pressure increase decline process in standard maximum pressure value compare;

Whether determining unit, for qualified according to comparative result determination bolted.

13. bolted checkout gears according to claim 12, is characterized in that, describedly determine that submodule also comprises:

Second acquisition unit, for according to bolt normal fastening time pressure change calibration curve or pressure in time and change normal data list in time and obtain standard maximum pressure value in described pressure increase decline standard number and described each pressure increase decline process.

14. bolted checkout gears according to claim 12, is characterized in that, describedly determine that submodule also comprises:

3rd acquiring unit, for according to bolt normal fastening time moment rise and fall standard number and each moment ascending and descending process in standard maximum moment value, obtain the standard maximum pressure value in described pressure increase decline standard number and described each pressure increase decline process by the moment table of comparisons inquiring about described hydraulic spanner.

15. 1 kinds of hydraulic spanners, is characterized in that, comprise hydraulic pump, mechanical pointer Pressure gauge, oil pipe, hydraulic spanner head and manograph, wherein:

Described hydraulic pump is connected with described hydraulic spanner head by described oil pipe, and described mechanical pointer Pressure gauge is connected with described hydraulic pump, and described manograph is connected with the oil-out of described hydraulic pump and described oil pipe respectively;

Described manograph, the time dependent status data of the pressure for gathering hydraulic spanner described in bolted process.

16. hydraulic spanners according to claim 15, is characterized in that, described manograph also for:

Store the time dependent status data of described pressure of the described hydraulic spanner of described collection.

17. hydraulic spanners according to claim 15 or 16, is characterized in that, described manograph is connected with the described oil-out of described hydraulic pump and described oil pipe respectively by threeway oil connection.

18. 1 kinds of bolted detection systems, is characterized in that, comprise the bolted checkout gear as described in any one of claim 8-14 and the hydraulic spanner as described in any one of claim 15-17, wherein:

Acquisition module in described bolted checkout gear is connected with the manograph in described hydraulic spanner;

Described acquisition module obtains the time dependent status data of pressure of the described hydraulic spanner that manograph gathers described in bolted process.