A pressure warning method for steel-plastic conversion pipe assembly

Abstract

The present invention relates to the technical field of steel-plastic conversion pipe fitting assembly, and discloses a pressure early warning method for steel-plastic conversion pipe fitting assembly, comprising: using an annular pressure measuring device to measure the pressure distribution of the pipe fitting, judging the uniformity, if it is uneven, comparing the forward and reverse quantities, checking the pressure pattern, if the pressure pattern decreases, rotating and performing a secondary inspection, and determining the adjustment direction and point according to the pressure distribution situation, executing the adjustment strategy and continuing the assembly after completion, and if the total pressure is lower than the preset value, an alarm is issued, otherwise the pipe fitting is retained; the number of alarms and waste are reduced through the adjustment strategy, resource waste and cost are reduced, product yield and quality stability are improved, and production efficiency is optimized; the pressure distribution is used to determine the adjustment direction and point, accurately determine the adjustment strategy, avoid trial and error and repeated adjustments, improve efficiency, quickly achieve ideal results, avoid blind overall adjustments, and solve problems in a targeted manner.

Description

Technical Field

[0001] The present invention relates to the technical field of steel-plastic conversion pipe fitting assembly, and in particular to a pressure early warning method for steel-plastic conversion pipe fitting assembly. Background Art

[0002] Steel-plastic conversion fittings are a type of pipe connector, usually used to connect steel pipes and plastic pipes to achieve the conversion from steel pipes to plastic pipes; reducer fittings for converting large-diameter steel pipes to small-diameter plastic pipes are a relatively common steel-plastic conversion fittings. For this type of reducer fittings, when assembling and connecting large-diameter steel pipes and small-diameter plastic pipes, they are generally pressed together.

[0003] Currently, the more common press-fitting method is to place the steel pipe and the plastic pipe separately in the assembly position, and apply pressure to one of the pipes through a force-applying device, so that it is nested with the other pipe fitting to form a whole, thus completing the assembly of the pipe fittings. In this process, due to the inclination of the cross-section of the pipe fitting itself or problems with the force-applying direction of the force-applying device, some pipe fittings will be skewed from the central axis during the assembly process, resulting in the final assembled steel-plastic conversion pipe fitting being an unqualified product. In the existing assembly process of such pipe fittings, when encountering this skew phenomenon, it is generally directly alarmed and discarded, which to a certain extent causes waste of raw materials and increases production costs. This scheme intends to propose a method for adjusting the skew during the assembly process so that the final assembled pipe fittings meet product requirements, reduce alarms and discards, and help reduce production costs. Summary of the Invention

[0004] The present invention provides a pressure warning method for assembling a steel-plastic conversion pipe fitting, which is used to facilitate solving the problems mentioned in the above background technology.

[0005] The present invention provides the following technical solution: a pressure early warning method for steel-plastic conversion pipe assembly, comprising:

[0006] Use an annular pressure measuring device to measure the pressure at various positions of the pipe during the pressurized assembly process, obtain the pressure values measured by each measuring unit of the annular pressure measuring device, and form a pressure set;

[0007] Perform data processing on the pressure values in the pressure set to determine whether the current pressure distribution is uniform;

[0008] If the pressure distribution is even, continue to pressurize the assembly until the assembly is completed;

[0009] Otherwise, obtain the forward quantity and the reverse quantity and compare them to determine whether the forward quantity and the reverse quantity are similar in quantity;

[0010] If the forward and reverse quantities are similar in quantity, determine whether the pressure value decreases regularly, otherwise the pipe fitting will be discarded;

[0011] If the pressure value decreases regularly, rotate the pipe and perform a second test to determine whether to keep the pipe;

[0012] If the pipe fittings are retained, the direction of connection adjustment is obtained based on the distribution of pressure values on the annular pressure measuring device;

[0013] According to the connection adjustment direction, the connection adjustment point, the force application point and the force application direction are obtained;

[0014] Execute adjustment strategies for pipe fittings based on the adjustment direction of the connection and the force application point;

[0015] Continue to pressurize and assemble the pipe fittings that have completed the adjustment strategy until the assembly is completed;

[0016] Obtain the sum of all pressure values measured by the annular pressure measuring device when the pipe assembly is completed. If the sum of all pressure values is lower than the preset pressure value, an alarm will be issued;

[0017] If the sum of all pressure values is greater than or equal to the preset pressure value, the assembled pipe fitting is retained.

[0018] Optional: Determining whether the current pressure distribution is uniform includes:

[0019] S1. Set the uniform determination deviation threshold K;

[0020] S2. Process the pressure values in the pressure set and calculate the average of all pressure values in the pressure set, which is recorded as the pressure set average;

[0021] S3. Calculate the absolute value of the difference between each pressure value and the pressure set average, and record it as the pressure average difference;

[0022] S4. Calculate the ratio of each pressure average difference to the pressure set average to form a ratio set;

[0023] S5. Compare each ratio in the ratio set with K. If all ratios in the ratio set are less than or equal to K, the pressure distribution is deemed to be uniform.

[0024] S6. When there is a ratio greater than K in the ratio set, it is determined that the pressure distribution is uneven.

[0025] Optional: The determining whether the forward quantity and the reverse quantity are similar in quantity includes:

[0026] S7. Obtain the maximum pressure value and the minimum pressure value in the pressure set;

[0027] S8. Based on the actual distribution of pressure values on the annular pressure measuring device, starting from the maximum pressure value and moving clockwise to the minimum pressure value is recorded as the forward direction, and starting from the maximum pressure value and moving counterclockwise to the minimum pressure value is recorded as the reverse direction;

[0028] S9. Obtain the number of pressure measurement units starting from the maximum pressure value and proceeding to the minimum pressure value, and record it as the forward number;

[0029] S10, obtaining the number of pressure measurement units that exist in the reverse direction starting from the maximum pressure value and going back to the minimum pressure value, and recording it as the reverse number;

[0030] S11, setting the quantity deviation threshold J;

[0031] S12, obtaining the difference between the forward quantity and the reverse quantity, recorded as H, and calculating the ratio of H to the total number of pressure measurement units, recorded as Q;

[0032] S13. If Q>J, the pipe fitting is discarded;

[0033] S14. If Q≤J, it is determined that the forward quantity and the reverse quantity are similar in quantity.

[0034] Optional: The step of determining whether the pressure value decreases regularly includes:

[0035] S15, setting a regular decreasing deviation threshold F;

[0036] S16, obtaining all existing pressure values in the forward direction, calculating the difference between all adjacent pressure values, and recording it as the forward difference;

[0037] S17. Calculate the average of all orthogonal differences, record it as G, and calculate the absolute value of the difference between each orthogonal difference and G, record it as the orthogonal average difference;

[0038] S18. Obtain the ratio of each forward average difference to G, and record it as the forward ratio. If all forward ratios are less than or equal to F, then all forward differences are considered equal.

[0039] S19. If there is a forward ratio greater than F, it is determined that the forward differences are unequal.

[0040] Optionally, the step of determining whether the pressure value decreases regularly further includes:

[0041] S20, obtaining all reverse pressure values, calculating the difference between all adjacent pressure values, and recording it as the reverse difference;

[0042] S21. Calculate the average of the reverse differences, record it as B, and calculate the absolute value of the difference between each reverse difference and B, record it as the reverse average difference;

[0043] S22. Obtain the ratio of each reverse average difference to B, and record it as the reverse ratio. If all reverse ratios are less than or equal to F, then all reverse differences are deemed equal.

[0044] S23. If there is an inverse ratio greater than K, the inverse differences are deemed unequal;

[0045] S24. When the forward difference is equal and the reverse difference is equal, it is determined that the pressure value is regularly decreasing.

[0046] Optional: Rotating the pipe and performing a secondary inspection includes:

[0047] Rotate the pipe to any angle, change its position, and pressurize and assemble it again;

[0048] The annular pressure measuring device measures the pressure value at each position of the pipe at this time;

[0049] According to the pressure value obtained by measurement, execute steps S7-S24 again for secondary detection;

[0050] If after rotating the pipe, the forward and reverse quantities are similar in number and the pressure values decrease regularly, then keep the pipe.

[0051] Optional: the obtaining of the connection adjustment direction includes:

[0052] According to the actual distribution of pressure values on the annular pressure measuring device, the points where the maximum pressure value and the minimum pressure value are located are obtained;

[0053] On the annular pressure measuring device, point the point where the minimum pressure value is located in the direction of the point where the maximum pressure value is located as the adjustment direction of the connection.

[0054] Optionally, the step of obtaining the connection adjustment point, the force application adjustment point, and the force application adjustment direction includes:

[0055] Select the pipe fitting that is perpendicular to the measuring surface of the annular pressure measuring device and record it as the reference pipe fitting;

[0056] Obtain the center axis of the reference pipe fitting and record it as the reference center axis;

[0057] On the annular pressure measuring device, draw a straight line through the points where the maximum and minimum pressure values are located, and record it as the reference line;

[0058] Construct a plane through the reference line and the reference median axis, and record it as the reference plane;

[0059] Obtain four intersection points between the reference plane and the outer pipe surface and name them respectively;

[0060] Draw a perpendicular line to the measuring surface of the annular pressure measuring device through the point where the minimum pressure value is located, and record it as the reference perpendicular line;

[0061] For the two intersection points at the force application point, obtain the distance between each intersection point and the reference vertical line and compare them. The intersection point with a closer distance to the reference vertical line is named the first intersection point, and the intersection point with a farther distance from the reference vertical line is named the second intersection point.

[0062] For the two intersection points at the connection, obtain the distance between each intersection point and the reference straight line and compare them. The intersection point with a closer distance to the reference perpendicular line is named the third intersection point, and the intersection point with a farther distance from the reference perpendicular line is named the fourth intersection point.

[0063] The first intersection point is used as the force application point for adjustment, and the third intersection point is used as the connection point for adjustment;

[0064] The direction starting from the adjustment point of the force application location and parallel to the reference line pointing to the connection location is obtained as the adjustment direction of the force application location.

[0065] Optionally, the step of executing an adjustment strategy on the pipe fitting includes:

[0066] Adjust the pipe fittings by adjusting the point at the connection, applying pressure in the direction of the connection, adjusting the point at the force application point, and applying pressure in the direction of the force application point;

[0067] During the pipe fitting adjustment process, the pressure value measured by the annular pressure measuring device is obtained, and steps S1 to S6 are executed to determine whether the current pressure distribution is uniform;

[0068] When the pressure measured by the annular pressure measuring device is evenly distributed, the application of pressure to the pipe fitting is stopped, and the adjustment strategy for the pipe fitting is completed.

[0069] The present invention has the following beneficial effects:

[0070] 1. The annular pressure measuring device is used to measure the pressure values at various positions along the pipe. Based on the relationship between the pressure values, the current state of the pipe during assembly can be obtained. It can also be determined whether the pipe is deviating from the normal axis and becoming skewed, which is used to determine the subsequent treatment method for the pipe.

[0071] 2. By comparing the forward quantity and the reverse quantity, the status of the currently skewed pipe can be determined, and whether the skew can be adjusted can be judged. When the forward quantity and the reverse quantity are similar in quantity, it means that the current skew has the possibility of being adjusted to a normal state; a certain difference between the forward quantity and the reverse quantity is allowed, and it is not required to be completely equal. This can reduce the impact caused by measurement errors, better reflect the actual situation of the measured object, and reduce unnecessary interference caused by small fluctuations.

[0072] 3. Secondary inspection can ensure whether the pipe fittings really need adjustment, avoid extra work and possible problems caused by misjudgment or unnecessary adjustment, and avoid unnecessary operations caused by premature adjustment, which helps save time and resources and improve work efficiency. At the same time, it also strengthens the quality control of the pipe fitting assembly process, ensuring that each step of the operation is verified and confirmed, which helps to improve the accuracy and quality of the assembly process.

[0073] 4. By implementing adjustment strategies for pipe fittings, the generation of waste can be reduced, the waste of raw materials and human resources can be reduced, which is conducive to reducing production costs, reducing losses, improving product yield and quality stability, optimizing production efficiency, saving production time, and improving production efficiency.

[0074] 5. Determine the adjustment strategy based on the actual distribution of pressure. The specific analysis of pressure distribution can more accurately determine the adjustment points at the connection, the adjustment points at the force application points, the adjustment directions at the connection and the adjustment directions at the force application points, avoid unnecessary trial and error and repeated adjustments, improve adjustment efficiency, and achieve the ideal adjustment results more quickly, avoiding blind overall adjustments and solving problems in a targeted manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0075] Figure 1 This is a schematic diagram of the distribution of pressure measuring units in the annular pressure measuring device of the present invention.

[0076] Figure 2 It is a schematic cross-sectional view of the steel-plastic conversion pipe fitting of the present invention along the reference plane. DETAILED DESCRIPTION

[0077] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0078] Example

[0079] A pressure early warning method for steel-plastic conversion pipe assembly, comprising:

[0080] Use an annular pressure measuring device to measure the pressure at various positions of the pipe during the pressurized assembly process, obtain the pressure values measured by each measuring unit of the annular pressure measuring device, and form a pressure set; Figure 1The annular pressure measuring device is composed of a plurality of pressure measuring units, which are equidistantly distributed on the measuring surface of the annular pressure measuring device in an annular arrangement. The pressure measuring units can be configured to include a structure of a pressure sensor. The annular pressure measuring device measures the pressure values at various positions along a circle of the pipe fitting, and thus, based on the relationship between the pressure values, the current state of the pipe fitting during the assembly process is obtained, and it is determined whether the pipe fitting deviates from the normal axis and becomes skewed, so as to determine the subsequent treatment method for the pipe fitting.

[0081] Perform data processing on the pressure values in the pressure set to determine whether the current pressure distribution is uniform;

[0082] If the pressure distribution is even, it means that the current pipe fitting has not deviated or tilted during the assembly process, and the pressure assembly will continue until the assembly is completed;

[0083] Otherwise, obtain the forward quantity and the reverse quantity and compare them to determine whether the forward quantity and the reverse quantity are similar in quantity; by comparing the forward quantity and the reverse quantity, know the status of the currently skewed pipe fitting and determine whether the skewness can be adjusted. When the forward quantity and the reverse quantity are similar in quantity, it means that the current skewness has the possibility of being adjusted to a normal state; allowing a certain difference between the forward quantity and the reverse quantity, rather than requiring them to be completely equal, can reduce the impact caused by measurement errors, better reflect the true situation of the measured object, and reduce unnecessary interference caused by small fluctuations.

[0084] If the forward and reverse quantities are similar in quantity, determine whether the pressure value decreases regularly. Otherwise, the pipe fitting should be discarded. If the pressure decreases regularly, it means that the pipe fitting is skewed based on the axis of a certain pipe end section. In this case, the pipe fitting can be adjusted by applying pressure in two directions, and a good adjustment effect can be achieved. After adjustment, the finally assembled pipe fitting can meet the product requirements.

[0085] If the pressure value decreases regularly, rotate the pipe and perform a secondary inspection to determine whether to retain the pipe. This secondary inspection can ensure whether the pipe really needs adjustment, avoid additional work and possible problems caused by misjudgment or unnecessary adjustments, and avoid unnecessary operations caused by premature adjustments. This helps save time and resources and improve work efficiency. It also strengthens quality control of the pipe assembly process, ensuring that each step of the operation is verified and confirmed, which helps improve the accuracy and quality of the assembly process.

[0086] If the pipe fittings are retained, the direction of connection adjustment is obtained based on the distribution of pressure values on the annular pressure measuring device;

[0087] According to the connection adjustment direction, the connection adjustment point, the force application point and the force application direction are obtained;

[0088] Adjustment strategies are implemented for pipe fittings based on the adjustment directions of the connections and the force application points. Implementing adjustment strategies for pipe fittings can reduce the generation of waste, reduce the waste of raw materials and human resources, and help reduce production costs, reduce losses, improve product yield and quality stability, optimize production efficiency, save production time, and improve production efficiency.

[0089] Continue to pressurize and assemble the pipe fittings that have completed the adjustment strategy until the assembly is completed;

[0090] Obtain the sum of all pressure values measured by the annular pressure measuring device when the pipe assembly is completed. If the sum of all pressure values is lower than the preset pressure value, an alarm will be issued;

[0091] If the sum of all pressure values is greater than or equal to the preset pressure value, the assembled pipe fitting is retained.

[0092] The determining whether the current pressure distribution is uniform includes:

[0093] S1. Set the uniformity determination deviation threshold K. The value of K is set based on the offset skew requirement of the assembled pipe. If the offset skew of the assembled pipe is required to be very small, the value of K is set smaller accordingly. The smaller the K value, the closer the assembled pipe is to a straight line.

[0094] S2. Process the pressure values in the pressure set and calculate the average of all pressure values in the pressure set, which is recorded as the pressure set average;

[0095] S3. Calculate the absolute value of the difference between each pressure value and the pressure set average, and record it as the pressure average difference;

[0096] S4. Calculate the ratio of each pressure average difference to the pressure set average to form a ratio set;

[0097] S5. Compare each ratio in the ratio set with K. If all ratios in the ratio set are less than or equal to K, it is determined that the pressure distribution is uniform, and the pipe fittings with uniform pressure distribution are assembled.

[0098] S6. When a ratio greater than K exists in the ratio set, it is determined that the pressure distribution is uneven, and the current state of the pipe is determined to check whether there is a possibility of adjustment.

[0099] The determining whether the forward quantity and the reverse quantity are similar in quantity includes:

[0100] S7. Obtain the maximum pressure value and the minimum pressure value in the pressure set;

[0101] S8. Based on the actual distribution of pressure values on the annular pressure measuring device, starting from the maximum pressure value and moving clockwise to the minimum pressure value is recorded as the forward direction, and starting from the maximum pressure value and moving counterclockwise to the minimum pressure value is recorded as the reverse direction;

[0102] S9. Obtain the number of pressure measurement units starting from the maximum pressure value and proceeding to the minimum pressure value, and record it as the forward number;

[0103] S10, obtaining the number of pressure measurement units that exist in the reverse direction starting from the maximum pressure value and going back to the minimum pressure value, and recording it as the reverse number;

[0104] S11. Setting a quantity deviation threshold J; the value of J is set according to the state requirements of the adjustable pipe fitting. The smaller the value of J is set, the closer the axis of the pipe fitting that is skewed is to the center line of the pipe fitting, thereby making the assembly effect after adjustment more perfect.

[0105] S12, obtaining the difference between the forward quantity and the reverse quantity, recorded as H, and calculating the ratio of H to the total number of pressure measurement units, recorded as Q;

[0106] S13. If Q>J, the current skew of the pipe fitting is considered irregular. Even if adjustments are made, the final effect will not meet the product requirements. There is no need for adjustment, and the pipe fitting is discarded.

[0107] S14. If Q≤J, it is determined that the forward quantity and the reverse quantity are similar in quantity, and the current status of the pipe fitting is further determined to check whether it can be adjusted.

[0108] The determining whether the pressure value is decreasing regularly includes:

[0109] S15. Setting a regular decreasing deviation threshold F; the setting of the F value is also set according to the state requirements of the adjustable pipe fitting. The smaller the F value is set, the more regular the pressure distribution is when the pipe fitting is skewed, and the easier it is to adjust the skewness of the pipe fitting.

[0110] S16, obtaining all existing pressure values in the forward direction, calculating the difference between all adjacent pressure values, and recording it as the forward difference;

[0111] S17. Calculate the average of all orthogonal differences, record it as G, and calculate the absolute value of the difference between each orthogonal difference and G, record it as the orthogonal average difference;

[0112] S18. Obtain the ratio of each forward average difference to G, and record it as the forward ratio. If all forward ratios are less than or equal to F, then all forward differences are considered equal.

[0113] S19. If there is a forward ratio greater than F, it is determined that the forward differences are unequal.

[0114] The determining whether the pressure value is decreasing regularly also includes:

[0115] S20, obtaining all reverse pressure values, calculating the difference between all adjacent pressure values, and recording it as the reverse difference;

[0116] S21. Calculate the average of the reverse differences, record it as B, and calculate the absolute value of the difference between each reverse difference and B, record it as the reverse average difference;

[0117] S22. Obtain the ratio of each reverse average difference to B, and record it as the reverse ratio. If all reverse ratios are less than or equal to F, then all reverse differences are deemed equal.

[0118] S23. If there is an inverse ratio greater than K, the inverse differences are deemed unequal;

[0119] S24. When the forward difference is equal and the reverse difference is equal, it is determined that the pressure value is regularly decreasing.

[0120] The rotating pipe and performing secondary inspection include:

[0121] Rotate the pipe to any angle, change its position, and pressurize and assemble it again;

[0122] The annular pressure measuring device measures the pressure value at each position of the pipe at this time;

[0123] According to the pressure value obtained by measurement, execute steps S7-S24 again for secondary detection;

[0124] If after rotating the pipe, the forward and reverse quantities are similar in number and the pressure values decrease regularly, then keep the pipe.

[0125] The obtaining of the connection adjustment direction includes:

[0126] According to the actual distribution of pressure values on the annular pressure measuring device, the points where the maximum pressure value and the minimum pressure value are located are obtained;

[0127] On the annular pressure measuring device, point the point where the minimum pressure value is located in the direction of the point where the maximum pressure value is located as the adjustment direction of the connection.

[0128] The obtaining of the connection adjustment point, the force application adjustment point, and the force application adjustment direction includes:

[0129] Select the pipe fitting that is perpendicular to the measuring surface of the annular pressure measuring device and record it as the reference pipe fitting;

[0130] Obtain the center axis of the reference pipe fitting and record it as the reference center axis;

[0131] On the annular pressure measuring device, draw a straight line through the points where the maximum and minimum pressure values are located, and record it as the reference line;

[0132] Construct a plane through the reference line and the reference median axis, and record it as the reference plane;

[0133] Reference Figure 2 , obtain the four intersection points between the reference plane and the outer pipe surface, and name them respectively;

[0134] Draw a perpendicular line to the measuring surface of the annular pressure measuring device through the point where the minimum pressure value is located, and record it as the reference perpendicular line;

[0135] For the two intersection points at the force application point, obtain the distance between each intersection point and the reference vertical line and compare them. The intersection point with a closer distance to the reference vertical line is named the first intersection point, and the intersection point with a farther distance from the reference vertical line is named the second intersection point.

[0136] For the two intersection points at the connection, obtain the distance between each intersection point and the reference straight line and compare them. The intersection point with a closer distance to the reference perpendicular line is named the third intersection point, and the intersection point with a farther distance from the reference perpendicular line is named the fourth intersection point.

[0137] The first intersection point is used as the force application point for adjustment, and the third intersection point is used as the connection point for adjustment;

[0138] The direction from the force-applying adjustment point as the starting point, parallel to the reference line, toward the connection, is obtained as the force-applying adjustment direction. The adjustment strategy is determined based on the actual pressure distribution. A detailed analysis of the pressure distribution can more accurately determine the connection adjustment point, force-applying adjustment point, connection adjustment direction, and force-applying adjustment direction. This avoids unnecessary trial and error and repeated adjustments, improves adjustment efficiency, and allows for faster achievement of desired adjustment results. It avoids blind, holistic adjustments and instead addresses the problem in a targeted manner.

[0139] The step of executing the adjustment strategy on the pipe fitting includes:

[0140] Adjust the pipe fittings by adjusting the point at the connection, applying pressure in the direction of the connection, adjusting the point at the force application point, and applying pressure in the direction of the force application point;

[0141] During the pipe fitting adjustment process, the pressure value measured by the annular pressure measuring device is obtained, and steps S1 to S6 are executed to determine whether the current pressure distribution is uniform;

[0142] When the pressure measured by the annular pressure measuring device is evenly distributed, the application of pressure to the pipe fitting is stopped, and the adjustment strategy for the pipe fitting is completed.

[0143] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0144] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A pressure warning method for steel-plastic conversion pipe assembly, characterized in that: The method includes using an annular pressure measuring device to measure the pressure at various positions of the pipe during the pressurized assembly process, obtaining the pressure values measured by each measuring unit of the annular pressure measuring device, and forming a pressure set; Perform data processing on the pressure values in the pressure set to determine whether the current pressure distribution is uniform; if the pressure distribution is uniform, continue to apply pressure and assemble until the assembly is completed; otherwise, obtain the forward number and the reverse number and compare them to determine whether the forward number and the reverse number are similar in quantity; determining whether the forward number and the reverse number are similar in quantity includes obtaining the maximum pressure value and the minimum pressure value in the pressure set; according to the actual distribution of the pressure values on the annular pressure measuring device, take the maximum pressure value as the starting point, go clockwise to the minimum pressure value, and record it as the forward direction, and take the maximum pressure value as the starting point, go counterclockwise to the minimum pressure value, and record it as the reverse direction; obtain the number of pressure measurement units that exist from the maximum pressure value in the forward direction to the minimum pressure value, and record it as the forward number; obtain the number of pressure measurement units that exist from the maximum pressure value in the reverse direction to the minimum pressure value, and record it as the reverse number; Set a quantity deviation threshold J; obtain the difference between the forward quantity and the reverse quantity, record it as H, and calculate the ratio of H to the total number of pressure measurement units, record it as Q; if Q>J, discard the pipe fitting; if Q≤J, the forward quantity and the reverse quantity are considered to be similar in quantity; If the number of forward and reverse pressures is similar in number, determine whether the pressure value is regularly decreasing; determining whether the pressure value is regularly decreasing includes setting a regular decreasing deviation threshold F; obtaining all forward pressure values, calculating the difference between all adjacent pressure values, and recording it as a forward difference; calculating the average of all forward differences, and recording it as G, and calculating the absolute value of the difference between each forward difference and G, and recording it as a forward average difference; Obtain the ratio of each forward average difference to G, recorded as the forward ratio. If all forward ratios are less than or equal to F, then all forward differences are considered equal. If there is a forward ratio greater than F, the forward differences are considered unequal; And obtain all the pressure values that exist in the reverse direction, calculate the difference between all adjacent pressure values, and record it as the reverse difference; Calculate the average of the reverse differences, record it as B, and calculate the absolute value of the difference between each reverse difference and B, record it as the reverse average difference; Obtain the ratio of each reverse average difference to B, recorded as the reverse ratio. If all reverse ratios are less than or equal to F, then all reverse differences are considered equal; if there is a reverse ratio greater than F, then the reverse differences are considered unequal; when the forward differences are equal and the reverse differences are equal, then the pressure value is considered to be regularly decreasing; If the pressure values decrease regularly, the pipe is rotated and a secondary inspection is performed to determine whether to retain the pipe. Rotating the pipe and performing the secondary inspection includes rotating the pipe to any angle, changing the position of the pipe, and re-pressurizing and assembling the pipe; the annular pressure measuring device measures the pressure values at various positions of the pipe at this time; based on the pressure values obtained by the measurements, the above steps are repeated for a secondary inspection; if, after rotating the pipe, the number of forward and reverse pressure values is similar and the pressure values decrease regularly, the pipe is retained; if the pipe is retained, the direction of connection adjustment is determined based on the distribution of pressure values on the annular pressure measuring device; According to the connection adjustment direction, the connection adjustment point, the force application point and the force application direction are obtained; Execute adjustment strategies for pipe fittings based on the adjustment direction of the connection and the force application point; Continue to pressurize and assemble the pipe fittings that have completed the adjustment strategy until the assembly is completed; Obtain the sum of all pressure values measured by the annular pressure measuring device when the pipe assembly is completed. If the sum of all pressure values is lower than the preset pressure value, an alarm will be issued; If the sum of all pressure values is greater than or equal to the preset pressure value, the assembled pipe fitting is retained.

2. A steel-plastic conversion pipe assembly pressure warning method according to claim 1, characterized in that: The determining whether the current pressure distribution is uniform includes: S1. Set the uniform determination deviation threshold K; S2. Process the pressure values in the pressure set and calculate the average of all pressure values in the pressure set, which is recorded as the pressure set average; S3. Calculate the absolute value of the difference between each pressure value and the pressure set average, and record it as the pressure average difference; S4. Calculate the ratio of each pressure average difference to the pressure set average to form a ratio set; S5. Compare each ratio in the ratio set with K. If all ratios in the ratio set are less than or equal to K, the pressure distribution is deemed to be uniform. S6. When there is a ratio greater than K in the ratio set, it is determined that the pressure distribution is uneven.

3. A steel-plastic conversion pipe assembly pressure warning method according to claim 2, characterized in that: The method of obtaining the connection adjustment direction includes: obtaining the points where the maximum pressure value and the minimum pressure value are located based on the actual distribution of the pressure values on the annular pressure measuring device; and pointing the point where the minimum pressure value is located on the annular pressure measuring device in the direction of the point where the maximum pressure value is located as the connection adjustment direction.

4. A steel-plastic conversion pipe assembly pressure warning method according to claim 3, characterized in that: The implementation of the adjustment strategy for the pipe fitting includes: adjusting the pipe fitting by adjusting the point position at the connection, applying pressure in the adjustment direction of the connection, adjusting the point position at the force application location, and applying pressure in the adjustment direction of the force application location; during the pipe fitting adjustment process, obtaining the pressure value measured by the annular pressure measuring device, and determining whether the current pressure distribution is uniform by executing steps S1-S6; when the pressure distribution measured by the annular pressure measuring device is uniform, stopping applying pressure to the pipe fitting, and completing the adjustment strategy for the pipe fitting.

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