Anti-dragging system of silane gas filling station and tension detection method

Abstract

The invention discloses an anti-pulling system of a silane gas filling station and a pulling force detection method, and relates to the technical field of gas filling safety, and the anti-pulling system of the silane gas filling station comprises a filling assembly which comprises a filling pipeline and an electromagnetic valve; the monitoring assembly is used for monitoring the pulling force borne by the filling pipeline; the control unit is in signal connection with the filling assembly and the monitoring assembly; wherein the control unit is used for receiving a tension signal from the monitoring assembly, controlling the on-off of the electromagnetic valve and monitoring the tension and extension state of the filling pipeline. According to the anti-pulling system of the silane gas filling station and the pulling force detection method, the pulling force borne by the filling pipeline is monitored in real time, gas supply is automatically cut off, and the gas leakage risk caused by pipeline dragging is reduced, so that possible fire or explosion accidents are prevented, and the safety performance is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas filling safety, and particularly relates to a silane gas filling station anti-pulling system and a pulling force detection method. BACKGROUND

[0002] In a silane gas filling station, it is crucial to safely and reliably fill gas from a gas cylinder to a vehicle's gas storage tank. At present, the filling station usually adopts manual monitoring and operation to ensure the safety of the filling process, including monitoring the state of the filling pipeline and preventing the pipeline from being accidentally pulled after filling is completed, which may cause damage or gas leakage.

[0003] An electromagnetic valve is usually arranged on the existing filling pipeline to turn on and off the gas supply. After filling is completed, the manual operation is used to close the electromagnetic valve to disconnect the gas supply, and the filling pipeline is disconnected from the vehicle. Since the joint of the filling pipeline is usually threadedly connected with the threaded port on the filling vehicle, if the manual monitoring is not in place and the pipeline is not disconnected from the vehicle in time after filling is completed, the vehicle may move without being disconnected from the pipeline, which may cause the joint of the pipeline to be directly disconnected from the vehicle under stress, thereby causing gas leakage and even serious safety accidents such as fire or explosion. Therefore, improvement is needed. SUMMARY

[0004] In view of the problems existing in the prior art silane gas filling station anti-pulling system and the pulling force detection method, the present application is proposed.

[0005] Therefore, the present application aims to provide a silane gas filling station anti-pulling system and a pulling force detection method, which aims to automatically cut off the gas supply when the pulling force caused by the filling vehicle directly leaving without being disconnected from the pipeline reaches a preset threshold value due to manual misoperation, thereby preventing gas leakage.

[0006] To solve the above technical problems, the present application provides the following technical scheme: a silane gas filling station anti-pulling system, comprising a filling assembly including a filling pipeline and an electromagnetic valve; a monitoring assembly for monitoring the pulling force on the filling pipeline; a control unit in signal connection with the filling assembly and the monitoring assembly; wherein the control unit is used to receive the pulling force signal from the monitoring assembly, control the on-off of the electromagnetic valve, and monitor the pulling force and extension state of the filling pipeline.

[0007] As a preferred scheme of the silane gas filling station anti-pulling system of the present application, wherein: the filling pipeline comprises a fixed pipeline and a corrugated pipeline connected in communication; the fixed pipeline is connected in communication with a silane gas cylinder to provide a fixed support for the connection of the filling station and the filling vehicle; wherein the corrugated pipeline has a certain tensile resistance and can be greatly extended without breaking when subjected to a pulling force.

[0008] As a preferred solution of the silane gas filling station anti-pulling system, wherein: the corrugated pipe is provided with a connecting head connected with the filling vehicle; the connecting head is threadedly connected with a threaded hole at the tail of the filling vehicle, and the connecting head and the threaded hole are automatically disconnected under force when the corrugated pipe extends to a certain limit.

[0009] As a preferred solution of the silane gas filling station anti-pulling system, wherein: the monitoring assembly comprises a pull wire, a tension sensor and a pressure transmitter; the two ends of the pull wire are respectively connected with a fixed panel and two hooks at the tail of the filling vehicle; the tension sensor is arranged on the pull wire and is used for monitoring the tension of the filling pipe and outputting a tension signal P proportional to the tension; the pressure transmitter is connected with the tension sensor and the electromagnetic valve and is used for receiving the tension signal P generated by the tension sensor and converting it into a control signal F suitable for controlling the electromagnetic valve.

[0010] The pressure transmitter and the electromagnetic valve are provided with an interlocking function, and when the tension monitored by the tension sensor reaches a preset safety threshold A, the control signal F generated by the pressure transmitter triggers the electromagnetic valve to close, thereby cutting off the gas supply of the filling pipe and preventing gas leakage.

[0011] As a preferred solution of the silane gas filling station anti-pulling system, wherein: the pull wire comprises a first connecting wire, a second connecting wire, a plug-in part and a clamping part; the plug-in part is arranged at the end of the first connecting wire; the clamping part is arranged at the end of the second connecting wire and is used for fixing the plug-in part and ensuring the stability of the plug-in part in the connected state.

[0012] As a preferred solution of the silane gas filling station anti-pulling system, wherein: the plug-in part comprises a pressure spring rod arranged in the plug-in part and used for providing axial pressure.

[0013] The axial pressure of the pressure spring rod is equal to a preset safety threshold A of the control unit, and when the tension monitored by the tension sensor reaches the preset safety threshold A, the connection between the plug-in part and the clamping part is automatically disconnected.

[0014] As a preferred solution of the silane gas filling station anti-pulling system, wherein: the control unit comprises a threshold setting module and a signal processing module; the threshold setting module is used for setting the preset tension safety threshold A; and the signal processing module is used for receiving an electrical signal from the pressure transmitter and comparing it with the preset safety threshold A of the threshold setting module.

[0015] Another object of the present application is to provide a tension detection method, which aims to: when the signal processing module detects that the electric signal exceeds the preset tension safety threshold A, the control unit controls the electromagnetic valve to close to cut off the gas supply.

[0016] To solve the above technical problems, the present application provides the following technical solutions: a tension detection method, including a silane gas filling station anti-pulling system, further comprising the following steps:

[0017] Step S1: monitoring the tension applied by the vehicle to the filling pipeline through a tension sensor;

[0018] Step S2: when the tension reaches the preset safety threshold A, the pressure transmitter converts the tension signal P into a control signal F;

[0019] Step S3: receiving the control signal F from the pressure transmitter and comparing it with the preset safety threshold A;

[0020] Step S4: the control unit receives the comparison result and controls the electromagnetic valve to close to cut off the gas supply.

[0021] As a preferred scheme of the tension detection method of the present application, the tension detection method further comprises step S5: if the vehicle continues to apply tension, causing the length of the corrugated pipeline to extend to the preset limit L, the threaded connector is automatically disconnected from the threaded port.

[0022] The present application has the beneficial effect that by monitoring the tension applied to the filling pipeline in real time and automatically cutting off the gas supply, the risk of gas leakage caused by pipeline dragging is reduced, thereby preventing possible fire or explosion accidents and improving safety performance. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0024] Fig. 1 The overall structure of the silane gas filling station anti-pulling system is shown in the schematic diagram;

[0025] Fig. 2 The structural connection of the filling assembly and the monitoring assembly is shown in the schematic diagram;

[0026] Fig. 3 The structural connection of the tension cable is shown in the schematic diagram;

[0027] Fig. 4 The flowchart of the control unit is shown in the schematic diagram;

[0028] Fig. 5 A flowchart of the tension detection method is shown. DETAILED DESCRIPTION

[0029] In order for those skilled in the art to better understand the present application, the present application will be further described in detail below in conjunction with specific embodiments and drawings.

[0030] The terms used in the present application are those general terms currently widely used in the art in consideration of the functions related to the present application, but these terms can be changed according to the intention of those skilled in the art, precedents, or new technology in the art. In addition, specific terms can be selected by the applicant, and in this case, the detailed meaning thereof will be described in the detailed description of the present application. Therefore, the terms used in the specification should not be understood as simple names, but based on the meaning of the terms and the overall description of the present application.

[0031] REFERENCE Figs. 1-2 The present embodiment provides a silane gas filling station anti-pulling system, which comprises a filling assembly 100 comprising a filling pipeline 101 and a solenoid valve 102.

[0032] The filling pipeline 101 is used to connect the silane gas cylinder and the filling vehicle, and the solenoid valve 102 is arranged on the filling pipeline 101 to turn on and off the gas supply; wherein the solenoid valve 102 is connected with the control unit 300, for receiving the control signal generated by the monitoring assembly 200, and controlling the on-off of the filling pipeline 101 according to the state of the control signal.

[0033] The filling pipeline 101 comprises a fixed pipeline 101a and a corrugated pipeline 101b connected in communication; wherein the fixed pipeline 101a is connected in communication between the silane gas cylinder and the fixed pipeline 101a connected to the silane gas cylinder, and the fixed pipeline 101a is provided to provide fixed support for the connection of the filling station and the filling vehicle; the corrugated pipeline 101b is a corrugated pipeline 101b, which has a certain tensile resistance and can be greatly extended without breaking when subjected to tension. Wherein the design of the corrugated pipeline 101b provides an elastic deformation space, so that the tension sensor 202 has enough time to detect the change of tension, which is the first layer of protection of the safety mechanism of this scheme.

[0034] The corrugated pipe 101b has a connecting head 101c connected with the filling vehicle; wherein one end of the corrugated pipe 101b is fixedly connected with the connecting head 101c, and the connecting head 101c is threadedly connected with a threaded hole at the tail of the filling vehicle; when the corrugated pipe 101b extends to a certain limit, the connecting head 101c and the threaded hole will be automatically disconnected under force; wherein even if the connecting head 101c at the end of the corrugated pipe 101b is disconnected from the tail of the filling vehicle, there will be no leakage of silane gas due to the fact that the electromagnetic valve 102 has been closed, which is the third layer of protection of the safety mechanism of the scheme.

[0035] During use, in the case of manual misoperation, the filling vehicle directly drives away, and a pulling force is generated on the filling pipe 101, so that the corrugated pipe 101b gradually extends to provide an elastic deformation space, so that the change of the pulling force on the filling pipe 101 has enough time to be monitored, achieving the first layer of protection of the safety mechanism.

[0036] When the pulling force on the filling pipe 101 reaches a preset safety threshold A, the electromagnetic valve 102 is automatically closed to cut off the gas supply, achieving the first layer of protection of the safety mechanism.

[0037] After the pulling force on the filling pipe 101 reaches the preset safety threshold A, the filling pipe 101 is still not disconnected from the filling vehicle, and then during the process of the filling vehicle continuing to apply the pulling force, the length of the corrugated pipe 101b extends to a preset limit L, at which time the threaded connecting head 101c and the threaded hole are automatically disconnected, ensuring that the vehicle and the filling pipe 101 are safely separated, thereby achieving the third layer of protection of the safety mechanism.

[0038] Through the above-mentioned three-layer protection mechanism, in the case that the manual monitoring or operation is not in place, the phenomenon that the filling vehicle and the filling pipe 101 directly drive away without being disconnected can be caused, and through the setting of the multi-layer protection mechanism, the safety performance of the device is improved, and the gas leakage is avoided.

[0039] Referring to Figs. 1-2 The embodiment provides a silane gas filling station anti-pulling system, which comprises a monitoring assembly 200, and the monitoring assembly 200 comprises a pull wire 201, a tension sensor 202 and a pressure transmitter 203.

[0040] The two ends of the pull wire 201 are respectively used for connecting two pull hooks of a fixed panel and a tail of a filling vehicle.

[0041] The tension sensor 202 is arranged on the pull wire 201 and is used for monitoring the pulling force on the filling pipe 101 and outputting a pulling force signal P proportional to the pulling force; wherein the tension sensor 202 provides accurate pulling force data, thereby providing a basis for automatic control of the system.

[0042] The pressure transmitter 203 is in signal connection with the tension sensor 202 and the electromagnetic valve 102, for receiving the tension signal P generated by the tension sensor 202 and converting it into a control signal F suitable for the control of the electromagnetic valve 102; wherein the conversion of the tension signal P into the control signal F facilitates the processing and control of the on-off of the electromagnetic valve 102 by the control unit 300, so as to realize automatic control and prevent gas leakage caused by the direct disconnection of the filling pipeline 101 from the vehicle after excessive stretching.

[0043] Wherein, the pressure transmitter 203 is provided with interlocking function with the electromagnetic valve 102, when the tension monitored by the tension sensor 202 reaches the preset safety threshold A, the control signal F generated by the pressure transmitter 203 triggers the electromagnetic valve 102 to close, so as to cut off the gas supply of the filling pipeline 101 and prevent gas leakage.

[0044] Referring to Fig. 3 The embodiment provides a silane gas filling station anti-pulling system, which comprises a tension line 201, and the tension line 201 comprises a first connecting line 201a, a second connecting line 201b, a plug-in part 201c and a clamping part 201d.

[0045] The plug-in part 201c is arranged at the end of the first connecting line 201a.

[0046] Further, the plug-in part 201c comprises a pressure spring rod 201e.

[0047] Wherein, the plug-in part 201c is fixedly connected at the end of the first connecting line 201a, and the pressure spring rod 201e is arranged in two groups and symmetrically distributed on the plug-in part 201c, so that the stability and firmness of the plug-in part 201c when connected with the clamping part 201d can be improved.

[0048] Wherein, the pressure spring rod 201e is arranged in the plug-in part 201c and used for providing axial pressure; wherein the pressure spring rod 201e comprises a sliding rod, a pressure spring and a clamping part; the sliding rod is slidingly arranged in the plug-in part 201c, one end of the sliding rod is fixedly connected with the clamping part, the pressure spring is arranged on the outer periphery of the sliding rod and has two ends fixedly connected with the plug-in part 201c and the clamping part respectively, and the two clamping parts are oppositely arranged and the clamping part and the clamping part 201d are in plane clamping.

[0049] Further, the clamping part 201d is arranged at the end of the second connecting line 201b and used for fixing the plug-in part 201c and ensuring the stability of the plug-in part 201c in the connected state.

[0050] Wherein, the clamping part 201d is fixedly connected at the end of the second connecting line 201b.

[0051] The axial pressure of the pressure spring rod 201e is equal to the safety threshold A preset by the control unit 300, and when the pulling force monitored by the pulling force sensor 202 reaches the preset safety threshold A, the connection between the plug-in part 201c and the clamping part 201d is automatically disconnected.

[0052] The clamping part 201d is clamped in the plane by the upper and lower pressure spring rods 201e, and when the safety pulling force threshold A is reached, that is, when the pulling force generated by the vehicle on the filling pipeline 101 is A, the on-off of the electromagnetic valve 102 is cut off. The pulling force generated by the vehicle on the filling pipeline 101 is equal to the force with which the clamping part 201d is pulled out from between the two clamping parts; since the clamping part 201d is clamped in the plane by the pressure spring rod 201e, the force with which the clamping part 201d is pulled out is affected by the static friction.

[0053] Static friction formula:

[0054] F 静max = μ 静 × N

[0055] Where μ 静 is the static friction coefficient, and N is the normal pressure (i.e. the pressure exerted by the pressure spring rod on the clamping part 201d).

[0056] When the force with which the clamping part 201d is pulled out is A, this force needs to overcome the static friction force generated by the two pressure spring rods 201e;

[0057] If the maximum value F 静max of the static friction force is greater than or equal to A, the clamping part 201d cannot be pulled out smoothly;

[0058] If the maximum value F 静max of the static friction force is less than A, the clamping part 201d can be pulled out;

[0059] Since the vehicle needs to continue to exert a pulling force on the filling pipeline 101 and the pulling wire 201 after the electromagnetic valve 102 is closed, the corrugated pipeline 101b needs to be extended to a certain limit before the connection head 101c and the vehicle are automatically disconnected, therefore, the maximum value F 静max of the static friction force needs to be greater than or equal to A, so that when the pulling force on the filling pipeline 101 reaches A, the electromagnetic valve 102 is automatically turned on and off, and the plug-in part 201c and the clamping part 201d are not disconnected, but when the electromagnetic valve 102 is closed, the plug-in part 201c and the clamping part 201d are disconnected only when the pulling force is continued to be exerted;

[0060] By disconnecting the plug 201c and the card connector 201d after the electromagnetic valve 102 is closed, the vehicle and the pull wire 201 cannot be separated, which causes the pull wire 201 to be damaged and affects the detection ability of the subsequent pull wire 201.

[0061] The positive pressure (N) calculation formula is:

[0062]

[0063] According to the positive pressure (N) calculation formula, the total pressure N exerted by the two pressure spring rods 201e on the card connector 201d is:

[0064]

[0065] Referring to Fig. 4 The present embodiment provides a silane gas filling station anti-pulling system, which comprises a control unit 300, and the control unit 300 comprises a threshold setting module 301 and a signal processing module 302.

[0066] The threshold setting module 301 is used to set a preset tension safety threshold A.

[0067] The signal processing module 302 is used to receive an electric signal from the pressure transmitter 203 and compare it with the preset threshold of the threshold setting module 301.

[0068] Further, when the signal processing module 302 detects that the electric signal exceeds the preset tension safety threshold A, the control unit 300 controls the electromagnetic valve 102 to be closed to cut off the gas supply.

[0069] The core of the present application is to design an anti-pulling system that can automatically detect and respond to changes in tension. By installing a tension sensor 202 on the filling pipeline 101, the tension on the filling pipeline 102 is monitored in real time and compared with the set tension threshold A. When the tension reaches or exceeds the set threshold A, the electromagnetic valve 102 will be immediately cut off, the gas source will be closed, and gas leakage will be prevented.

[0070] In order to determine a reasonable tension threshold, a large number of experimental studies have been carried out. The purpose of the experiment is to find a tension value that can effectively prevent pipeline rupture and avoid false triggering. The following is the experimental design and result analysis:

[0071] Purpose of the experiment: to determine the optimal tension threshold to achieve the best balance between safety, reliability and response speed of the device.

[0072] Experimental method: Under different tension threshold values, simulate the tension situation when the vehicle is driving away, record the safety of the pipeline (whether it breaks), reliability (whether it is mis-triggered), and response speed (the time from the tension reaching the threshold to the electromagnetic valve 102 being cut off);

[0073] The experiment covers a tension threshold range from 30N to 125N, and a total of 20 experiments are conducted.

[0074] The following is the specific experimental data table:

[0075] Experimental data table

[0076]

[0077]

[0078] In order to comprehensively evaluate the performance of the system, a comprehensive performance index (CPI) calculation method combining entropy weight method and grey correlation analysis is adopted. The following are the detailed calculation steps:

[0079] I. Entropy weight method, entropy weight method is a weight calculation method based on information entropy, which can objectively reflect the importance of each index. The calculation steps are as follows:

[0080] For the normalization processing of benefit type index:

[0081]

[0082] For the normalization processing of cost type index:

[0083]

[0084] x ij The original value of the jth index of the ith experiment.

[0085] Where i is the experiment index (i = 1, 2, …, n), j is the index index (j = 1, 2, …, m).

[0086] min(x ij ), max(x ij ) are the minimum and maximum values of all 20 experiments on the jth index.

[0087] r ij In the normalization process, x ij usually represents the value after preprocessing.

[0088] Calculate the entropy value of the index:

[0089] e j The information entropy of the jth index, the entropy value ej The larger, the more dispersed the data representing the index, the less information provided.

[0090] n: number of experimental groups (sample size). In the entropy formula, lnn is used to adjust the range of entropy values, ensuring that e j ∈[0,1].

[0091] where is the sum of all experimental groups on the jth index value.

[0092] p ij is the proportion of the characteristics of the ith sample under the jth index (normalized value).

[0093] Calculate the difference coefficient of the index: d j =1-e j .

[0094] Calculate the difference coefficient of the index:

[0095] where d j is the difference coefficient of the jth index (also known as information utility value), the larger the difference coefficient, the higher the importance of the index; w j is the weight of the jth index, where is the sum of the difference coefficients of all indexes. The weight w j satisfies m: number of indexes (number of indexes), in the weight calculation formula, m represents the total number of indexes.

[0096] II. Grey correlation analysis, grey correlation analysis is used to evaluate the correlation of each index with the ideal state. The calculation steps are as follows:

[0097] Determine the reference sequence: the index value under the ideal state, denoted as x j (For example, the safety index is 100%, the reliability index is 100%, and the response speed index is 0s).

[0098] Determine the comparison sequence: the index value of each experiment, denoted as x ij (the jth index value of the ith experiment). The same as x ij in the entropy weight method.

[0099] Calculate the grey correlation coefficient:

[0100]

[0101] where ξ ij is the grey correlation coefficient of the ith experiment on the jth index.

[0102] minmin|xj -x ij | : Two-level minimum difference, the minimum absolute difference of all experimental groups and all indicators from the reference value; maxmax|x j -x ij | : Two-level maximum difference, the maximum absolute difference of all experimental groups and all indicators from the reference value; p: resolution coefficient, used to adjust the calculation range of the correlation coefficient, usually taking the value of 0.5. The smaller p is, the stronger the resolution ability is.

[0103] Calculate the grey correlation degree: Where, γ i The grey correlation degree of the ith experimental group.

[0104] Calculate the comprehensive performance index (CPI):

[0105]

[0106] Where, S i The comprehensive performance index (CPI) of the ith experimental group, w j is the index weight obtained from the entropy weight method, γ ij is the grey correlation of the ith experimental group on the jth index.

[0107] According to the above method, the experimental data is calculated to obtain the comprehensive performance index (CPI) of each experimental group. The calculation result shows that when the tension threshold is 80N, the comprehensive performance index reaches the highest value (0.75), indicating that the system has reached the best balance between safety, reliability and response speed; therefore, the preset tension safety threshold A of the system is 80N.

[0108] Wherein, the working principle of a tension prevention system is as follows:

[0109] The tension sensor 202 monitors the tension of the filling pipeline 101 in real time and generates a tension signal P proportional to the tension. The pressure transmitter 203 receives the tension signal P generated by the tension sensor 202 and converts it into a control signal F suitable for the control of the electromagnetic valve 102. The signal processing module 302 receives the electrical signal from the pressure transmitter 203 and compares it with the preset safety threshold A set by the threshold setting module 301. When the monitored tension exceeds the preset safety threshold A (i.e. exceeds 80N), the signal processing module 302 generates a control signal F, which is received by the control unit 300 and controls the electromagnetic valve 102 to close, cutting off the gas supply. If the vehicle continues to apply tension, the length of the corrugated pipe 101b will extend to the preset limit L, and the threaded connector 101c will automatically disconnect from the threaded port, achieving safe separation of the vehicle and the filling pipeline 101.

[0110] When the tension value is less than the preset safety threshold A (80N), it means that the tension value is less than the maximum value F between the pressure spring rod 201e and the clamping piece 201d 静max Therefore, before the electromagnetic valve 102 is closed, the tension caused by the vehicle cannot automatically separate the plug-in piece 201c and the clamping piece 201d.

[0111] When the tension value is equal to 80N, it means that the tension value is equal to the maximum value F between the pressure spring rod 201e and the clamping piece 201d 静max At this time, the electromagnetic valve 102 is controlled to be closed by the control unit 300, but the tension caused by the vehicle at present cannot automatically separate the plug-in piece 201c and the clamping piece 201d.

[0112] After the electromagnetic valve 102 is closed, in the process of the vehicle continuing to apply tension, at this time the tension value is greater than 80N, that is, the tension value is greater than the preset safety threshold A and the maximum value F between the pressure spring rod 201e and the clamping piece 201d 静max , it means that the tension value has been greater than the preset safety threshold A (80N), so the tension generated by the vehicle on the pull wire 201 can make the clamping piece 201d smoothly out of the plug-in piece 201c, thereby realizing the automatic separation of the plug-in piece 201c and the clamping piece 201d.

[0113] Referring to Fig. 5 The embodiment provides a tension detection method, including a silane gas filling station anti-pulling system, and further includes the following steps:

[0114] Step S1: monitoring the tension applied by the vehicle to the filling pipeline 101 through the tension sensor 202;

[0115] Step S2: when the tension reaches the preset safety threshold A, the pressure transmitter 203 converts the tension signal P into a control signal F;

[0116] Step S3: receiving the control signal F from the pressure transmitter 203 and comparing it with the preset safety threshold A;

[0117] Step S4: the control unit 300 receives the comparison result and controls the electromagnetic valve 102 to be closed to cut off the gas supply;

[0118] Further, the tension detection method further includes step S5: if the vehicle continues to apply tension, causing the length of the corrugated pipeline 101b to extend to the preset limit L, the threaded connector 101c and the threaded port are automatically disconnected.

[0119] The preset safety threshold A is set according to the safety requirements and operating conditions of the filling station.

[0120] The safety threshold A takes into account the material properties of the filling line 101, the maximum force that can be encountered during the filling process, and a safety factor. Through the threshold setting module 301, the operator can adjust the safety threshold A according to the actual situation to adapt to different filling requirements.

[0121] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A silane gas filling station anti-pulling system characterized by: The utility model relates to a kind of silane filling system, including, Filling assembly (100), it includes filling pipeline (101) and solenoid valve (102); Monitoring assembly (200) is used to monitor the tension suffered by filling pipeline (101); Control unit (300) is signal connected with filling assembly (100) and monitoring assembly (200); Wherein, the control unit (300) is used to receive tension signal from monitoring assembly (200), control the on-off of solenoid valve (102), and monitor the tension and extension state of filling pipeline (101).

2. The silane gas filling station anti-pulling system according to claim 1, characterized in that: The filling pipeline (101) includes fixed pipeline (101a) and corrugated pipeline (101b) connected to each other; The fixed pipeline (101a) is connected to the silane cylinder and provides a fixed support for the connection between the filling station and the filling vehicle. Wherein, the corrugated pipeline (101b) has a certain tensile resistance and can extend greatly without breaking when subjected to tension.

3. The silane gas filling station anti-pulling system according to claim 2, characterized in that: The corrugated pipeline (101b) has a connector (101c) connected to the filling vehicle; Wherein, the connector (101c) is threadedly connected to the threaded hole at the tail of the filling vehicle, and the connector (101c) and the threaded hole will be automatically disconnected under force when the corrugated pipeline (101b) extends to a certain limit.

4. The silane gas filling station anti-pulling system according to claim 1 or 3, characterized in that: The monitoring assembly (200) includes a tension wire (201), a tension sensor (202), and a pressure transmitter (203); Both ends of the tension wire (201) are used to connect a fixed panel and two hooks at the tail of the filling vehicle, respectively. The tension sensor (202) is arranged on the tension wire (201) and is used to monitor the tension of the filling pipeline (101) and output a tension signal P proportional to the tension. The pressure transmitter (203) is signal connected with the tension sensor (202) and the solenoid valve (102), used to receive the tension signal P generated by the tension sensor (202) and convert it into a control signal F suitable for the control of the solenoid valve (102). Wherein, the pressure transmitter (203) and the solenoid valve (102) are provided with an interlocking function, when the tension monitored by the tension sensor (202) reaches a preset safety threshold A, the control signal F generated by the pressure transmitter (203) triggers the solenoid valve (102) to close, thereby cutting off the gas supply of the filling pipeline (101) and preventing gas leakage.

5. The silane gas filling station anti-pulling system according to claim 4, characterized in that: The tension wire (201) includes a first connecting wire (201a), a second connecting wire (201b), a plug-in part (201c), and a clamping part (201d); The plug-in part (201c) is arranged at the end of the first connecting wire (201a); The clamping part (201d) is arranged at the end of the second connecting wire (201b) and is used to fix the plug-in part (201c) and ensure its stability in the connected state.

6. The silane gas filling station anti-pulling system according to claim 5, characterized in that: The plug-in part includes a pressure spring rod (201e) arranged in the plug-in part (201c) and used to provide axial pressure. The axial pressure of the pressure spring rod (201e) is equal to the preset safety threshold A of the control unit (300), and when the tension monitored by the tension sensor (202) reaches the preset safety threshold A, the connection between the plug-in connector (201c) and the clamping connector (201d) is automatically disconnected.

7. The silane gas filling station anti-pulling system according to claim 5 or 6, characterized in that: The control unit (300) comprises a threshold setting module (301) and a signal processing module (302); The threshold setting module (301) is used to set the preset tension safety threshold A; The signal processing module (302) is used to receive the electrical signal from the pressure transmitter (203) and compare it with the preset safety threshold A of the threshold setting module (301).

8. The silane gas filling station anti-pulling system according to claim 7, characterized in that: When the signal processing module (302) detects that the electrical signal exceeds the preset tension safety threshold A, the control unit (300) controls the electromagnetic valve (102) to close to cut off the gas supply.

9. A tension detection method characterized by: The anti-pulling system of the silane gas filling station comprises the following steps: Step S1: Monitor the tension applied by the vehicle to the filling pipeline (101) through the tension sensor (202); Step S2: When the tension reaches the preset safety threshold A, the pressure transmitter (203) converts the tension signal P into a control signal F; Step S3: Receive the control signal F from the pressure transmitter (203) and compare it with the preset safety threshold A; Step S4: The control unit (300) receives the comparison result and controls the electromagnetic valve (102) to close to cut off the gas supply.

10. The tension detection method according to claim 9, characterized by: The tension detection method further comprises step S5: If the vehicle continues to apply tension, causing the length of the corrugated pipeline (101b) to extend to the preset limit L, the threaded connector (101c) and the threaded port are automatically disconnected.

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