Method for judging whether water pressure test is qualified or not

Abstract

The invention discloses a method for judging whether a water pressure test is qualified or not, and relates to the technical field of water-power engineering survey design tests. The method comprises the following steps: collecting and determining pre-test data; collecting data in the test process, and sorting the data to obtain the maximum pressure Pmax and the corresponding flow Qz; the length L of the output test section is calculated, and meanwhile q = QZ / (Pmax * L) is output; and performing test evaluation. According to the invention, the test problem can be handled in the first time, and the timeliness and accuracy of water pressure test result judgment are improved.

Description

Technical Field

[0001] The invention relates to the technical field of hydropower engineering survey, design and testing, and in particular to a method for determining whether a water pressure test is qualified or not. Background Art

[0002] Compared with general projects, hydropower projects are more professional, have higher technical standards, and require close integration of various disciplines. Water pressure test is a basic test, and the test results are used to evaluate the permeability level of rock mass and determine the engineering rock mass grade.

[0003] The water pressure test needs to be carried out in the borehole, involving mechanical equipment, engineering geology, structural design and other disciplines. It has the characteristics of complicated process, multiple operating procedures, complex test environment, long test cycle, etc. Due to objective factors such as the complexity of engineering geological conditions, the water pressure test in the past was mostly related to the core of this section of the project site, focusing on the q value. When the data is sorted and analyzed, it is combined with the engineering geological conditions of the entire project area. Only then can it be found that the possibility of failure of this water pressure test is high. It is necessary to conduct in-depth research and analysis to determine whether this water pressure test is successful. Therefore, the failure of the test is found in the surrounding area. The period is long. When it is found that the water pressure test is an unsuccessful test, it is difficult to make up for it in time. In view of this, there is an urgent need for a method to determine whether the water pressure test is successful in time. This method can immediately find out whether the test is a successful water pressure test after the test. Based on this, the unsuccessful test can be remedied in time, and each link of the test can be reviewed. After the parts that do not meet the test requirements are rectified, the water pressure test can be re-performed on this test section in time to ensure that successful water pressure test results are obtained in this section of the borehole, providing an accurate data basis for subsequent technical and professional work. Summary of the invention

[0004] The present invention aims at solving the problems in the prior art and provides a method for determining whether a water pressure test is qualified or not.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A method for determining whether a water pressure test is qualified or not comprises the following steps: step 1, collecting and determining data before the test; step 2, collecting data during the test, arranging the data to obtain the maximum pressure P max And the corresponding flow rate Qz; Step 3, based on the data of step 1 and step 2, calculate and output the test section length L, and at the same time, output q = Q Z / (P max ×L); Step 4, perform test evaluation based on the data from Steps 1 to 3.

[0007] Based on the above technical solution, further, in step 1, the data before the test include the thickness of the covering layer at the drilling position of x meters, the water pressure test position in the drilling depth range of y meters-z meters, and the test section length of the water pressure test is obtained: L=zy, in meters.

[0008] Based on the above technical solution, further, in step 2, the three pressures in the test process are respectively represented by P 1 , P 2 , P 3 Indicated by MPa, the maximum pressure in the test is assigned to P max , assign the corresponding flow Q under the maximum pressure to Q Z .

[0009] Based on the above technical solution, further, during the test process, the pressure data is monitored and displayed using a pressure gauge, and the flow data is monitored and displayed using a water meter.

[0010] Based on the above technical solution, further, in step 4, when the data situation is the first situation: under the condition of yx<15m, when in P max >0.35MPa, the output test is unsuccessful; when 0.35MPa≥P max >0.20MPa, then according to P 1 , P 2 , P 3 , Q1, Q2, Q3, Q4, Q5 to conduct water pressure tests at multiple pressures and multiple stages; when in P max ≤0.20MPa: If Q Z >100L / min, the output needs to check whether the plug, pipeline and its joints are leaking, and re-perform water pressure test according to technical requirements; if Q Z ≤100L / min, it means that the water pressure test is unsuccessful and it is necessary to repeat the water pressure test according to the technical requirements.

[0011] Based on the above technical solution, further, when 0.35MPa≥P max >0.20MPa, the water pressure test process is: when P 1 <P 2 <P 3 , at this time P 3 P max , and according to P 1 , P 2 , P 3 , P 2 , P 1 When the water pressure test of 3 pressures and 5 stages is completed in sequence, (P 1 ,Q1)(P 2 , Q2)(P3 , Q3)(P 2 ,Q4)(P 1 , Q5) are drawn into the PQ rectangular coordinate system with P as the ordinate and Q as the abscissa. A solid line is used to connect the origin o and (P 1 , Q1) point connection, (P 1 , Q1) point and (P 2 , Q2) point connection, (P 2 , Q2) point and (P 3 , Q3) and use a dotted line to connect (P 3 , Q3) point and (P 2 , Q4) point connection, (P 2 , Q4) point and (P 1 , Q5) point connection, (P 1 , Q5) point is connected with point o to draw a PQ curve of the relationship between pressure and flow. If this PQ curve is one of the standard curves A, B, C, D, and E, then the output of this water pressure test is successful; if this PQ curve is not any of the standard curves A, B, C, D, and E, then the output of this water pressure test is unsuccessful; when P 1 <P 2 <P 3 , at this time P 3 P max , and according to P 1 , P 2 , P 3 When the water pressure test of three pressures and three stages is completed sequentially, if q < 1, the water pressure test is output as successful, otherwise the water pressure test is output as unsuccessful.

[0012] Based on the above technical solution, further, when the data situation is the first situation: under the condition of 15m≤yx<30m; when in P max >0.65MPa; the output test is unsuccessful; when 0.65MPa≥P max >0.50MPa, then according to P 1 , P 2 , P 3 , Q1, Q2, Q3, Q4, Q5 to conduct water pressure tests at multiple pressures and multiple stages; when in P max When ≤0.50MPa, Q Z >100L / min, the output needs to check whether the plug, pipeline and its joints are leaking, and re-perform water pressure test according to technical requirements; Q Z ≤100L / min, the water pressure test was unsuccessful and needs to be repeated according to technical requirements.

[0013] Based on the above technical solution, further, when 0.65MPa≥P max When the pressure is higher than 0.50MPa, the water pressure test process is: 1 <P 2 <P 3 , at this time P 3 P max , and according to P 1 , P 2 , P 3 , P 2 , P 1 The water pressure test of 3 pressures and 5 stages was completed in sequence, and (P 1 ,Q1)(P 2 , Q2)(P 3 , Q3)(P 2 ,Q4)(P 1 , Q5) are drawn into the PQ rectangular coordinate system with P as the ordinate and Q as the abscissa. A solid line is used to connect the origin o and (P 1 , Q1) point connection, (P 1 , Q1) point and (P 2 , Q2) point connection, (P 2 , Q2) point and (P 3 , Q3) and use a dotted line to connect (P 3 , Q3) point and (P 2 , Q4) point connection, (P 2 , Q4) point and (P 1 , Q5) point connection, (P 1 , Q5) point is connected with point o to draw a PQ curve of the relationship between pressure and flow. If this PQ curve is one of the standard curves A, B, C, D, and E, then the output of this water pressure test is successful; if this PQ curve is not one of the standard curves A, B, C, D, and E, then the output of this water pressure test is unsuccessful; P 1 <P 2 <P 3 , at this time P 3 P max , and according to P 1 , P 2 , P 3 The water pressure test of 3 pressures and 3 stages is completed sequentially. If q < 1, the water pressure test is output as successful; otherwise, the water pressure test is output as unsuccessful.

[0014] Based on the above technical solution, further, in step 4, when the data situation is the first situation: under the condition of 30m≤yx; when P max >1.2MPa; the output test is unsuccessful; when 1.2MPa≥Pmax >0.90MPa, then according to P 1 , P 2 , P 3 , Q1, Q2, Q3, Q4, Q5 to conduct water pressure tests at multiple pressures and multiple stages; when P max ≤0.90MPa; Q Z >100L / min, the output needs to check whether the plug, pipeline and its joints are leaking, and re-perform water pressure test according to technical requirements; Q Z ≤100L / min, the water pressure test is output as unsuccessful and needs to be repeated according to technical requirements.

[0015] Based on the above technical solution, further, when 1.2MPa≥P max >0.90MPa, the water pressure test process is: when P 1 <P 2 <P 3 , at this time P 3 P max , and according to P 1 , P 2 , P 3 , P 2 , P 1 The water pressure test of 3 pressures and 5 stages was completed in sequence, and (P 1 ,Q1)(P 2 , Q2)(P 3 , Q3)(P 2 ,Q4)(P 1 , Q5) are drawn into the PQ rectangular coordinate system with P as the ordinate and Q as the abscissa. A solid line is used to connect the origin o and (P 1 , Q1) point connection, (P 1 , Q1) point and (P 2 , Q2) point connection, (P 2 , Q2) point and (P 3 , Q3) and use a dotted line to connect (P 3 , Q3) point and (P 2 , Q4) point connection, (P 1 , Q4) point and (P 1 , Q5) point connection, (P 1 , Q5) point is connected with point o to draw a PQ curve of the relationship between pressure and flow; if this PQ curve is one of the standard curves A, B, C, D, and E, then the output of this water pressure test is successful; if this PQ curve is not any of the standard curves A, B, C, D, and E, then the output of this water pressure test is unsuccessful; when P 1 <P 2<P 3 , at this time P 3 P max , and according to P 1 , P 2 , P 3 The water pressure test of 3 pressures and 3 stages is completed sequentially. If q < 1, the water pressure test is output as successful; otherwise, the water pressure test is output as unsuccessful.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The purpose of the present invention is to provide a method for evaluating whether a water pressure test is successful. After the water pressure test is completed in the field, the test result data can be judged in time by this method, and whether the water pressure test is successful can be immediately judged. If it is unsuccessful, the problem will be pointed out to ensure that the test problem is dealt with in the first time, thereby improving the timeliness and accuracy of the judgment. This method can not only be applied to the survey and design of hydropower projects, but also can be extended to water-related projects such as water conservancy projects and municipal projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Flow chart of the determination method of the present invention. DETAILED DESCRIPTION

[0019] The present invention is further described and illustrated below in conjunction with the accompanying drawings and specific embodiments. The technical features of each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0020] In order to make the above-mentioned purpose, features and advantages of the present invention more obvious and easy to understand, the specific implementation mode of the present invention is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below. The technical features in each embodiment of the present invention can be combined accordingly without conflicting with each other.

[0021] Example 1

[0022] This embodiment provides a method for determining whether a water pressure test is qualified or not, comprising the following steps:

[0023] Step 1, collect and determine the data before the test; specifically, the data before the test mainly includes the thickness of the overburden at the borehole location of x meters, the water pressure test location in the borehole depth range of y meters-z meters, and the test section length of the water pressure test is obtained: L=zy, both in meters. It should be noted that y and z refer to the depth of the borehole, that is, the water pressure test is carried out at a depth of y meters to z meters in the borehole; and x, y, and z can all be measured by a ruler.

[0024] Step 2: Collect the data during the test and sort the data to obtain the maximum pressure P max And the corresponding flow rate Qz: Specifically, the three pressures P during the test are 1 , P 2 , P 3 , the unit is MPa, and the maximum pressure in the test is assigned to P max , assign the corresponding flow Q under the maximum pressure to Q Z ; During the test, the pressure data is monitored and displayed by a pressure gauge, and the flow data is monitored and displayed by a water meter. It should be noted that Qz is the physical quantity of the water flow entering the hole; Qz is the maximum pressure P max The corresponding water flow, Q1 pressure is P 1 The water flow rate under action, Q2 is the pressure P 2 Water flow under action.

[0025] Step 3: Output the test section length L and q=Q Z / (P max ×L); where q is the Lu Rong value, which represents the water flow rate per 1m hole section under the action of 1MPa water pressure.

[0026] Step 4: Conduct test evaluation.

[0027] The first case: under the condition of yx<15m, yx represents the thickness of the rock mass outside the covering layer above the water pressure test hole section.

[0028] (1) When P max When the pressure is greater than 0.35MPa, the output is: the test is unsuccessful. It should be noted that, based on practical experience, the maximum test pressure value is set to 0.3MPa before conducting the test.

[0029] (2) When 0.35MPa≥P max >0.20MPa, then according to P 1 , P 2 , P 3 , Q1, Q2, Q3, Q4, Q5 and carry out water pressure tests with 3 pressures and 5 stages.

[0030] In this embodiment, ①P 1 <P2 <P 3 , at this time P 3 That is, P max , and according to P 1 , P 2 , P 3 , P 2 , P 1 The three pressure and five-stage water pressure tests were completed in sequence, respectively (P 1 ,Q1)(P 2 , Q2)(P 3 , Q3)(P 2 , Q4)(P 1 , Q5) are plotted in the PQ rectangular coordinate system with P as the ordinate (the ordinate: the origin is 0MPa, the maximum value is 1.0MPa, and 1cm represents 0.1MPa) and Q as the abscissa (the abscissa: the origin is 0L / min, the maximum value is 100L / min, and 1cm represents 10L / min). Use a solid line to connect the coordinate origin o (0L / min, 0MPa) and (P 1 , Q1) point connection, (P 1 , Q1) point and (P 2 , Q2) point connection, (P 2 , Q2) point and (P 3 , Q3) and use a dotted line to connect (P 3 , Q3) point and (P 2 , Q4) point connection, (P 2 , Q4) point and (P 1 , Q5) point connection, (P 1 , Q5) and point o are connected to draw a PQ curve of the relationship between pressure and flow. If this PQ curve is the standard curve type A (o-(P 1 ,Q1)-(P 2 ,Q2)-(P 3 , Q3) is a straight line, and (P 3 , Q3)-(P 2 ,Q4)-(P 1 , Q5)-o connection line basically coincides), B type (o-(P 1 ,Q1)-(P 2 ,Q2)-(P 3 , Q3) connecting line convex to the horizontal axis, and (P 3 , Q3)-(P 2 ,Q4)-(P 1 , Q5)-o connection line basically coincides), C type (o-(P 1 ,Q1)-(P 2 ,Q2)-(P 3, Q3) connecting line convex to the ordinate axis, and (P 3 , Q3)-(P 2 ,Q4)-(P 1 , Q5)-o connection line basically coincides), D type (o-(P 1 ,Q1)-(P 2 ,Q2)-(P 3 , Q3) connecting line convex to the ordinate axis, and (P 3 , Q3)-(P 2 ,Q4)-(P 1 , Q5)-o connection line is clockwise ring), E type (o-(P 1 ,Q1)-(P 2 ,Q2)-(P 3 , Q3) connecting line convex to the horizontal axis, and (P 3 , Q3)-(P 2 、Q4)-

[0031] (P 1 , Q5)-o connecting line is counterclockwise ring), then output: this water pressure test is successful. If this PQ curve is not one of the standard curves A, B, C, D, E, then output: this water pressure test is unsuccessful.

[0032] In this embodiment, ②P 1 <P 2 <P 3 (P max ), and according to P 1 , P 2 , P 3 The water pressure test of 3 pressures and 3 stages is completed in sequence. If q < 1, then the output is: this water pressure test is successful. Otherwise, the output is: this water pressure test is unsuccessful and it is necessary to repeat the water pressure test according to the technical requirements.

[0033] (3)P max ≤0.20MPa:

[0034] Q Z >100L / min, then output: Check the plug, pipeline and joints for leaks, and perform water pressure test again according to technical requirements. Z ≤100L / min, the water pressure test was unsuccessful and needs to be repeated according to technical requirements.

[0035] The second case: when 15m≤yx<30m:

[0036] (1) When P max>0.65MPa; then the output is: the test is unsuccessful. It should be noted that according to the actual situation, the maximum test pressure value is set to 0.6MPa before the test is performed.

[0037] (2) When 0.65MPa≥P max >0.50MPa: According to P 1 , P 2 , P 3 , Q1, Q2, Q3, Q4, Q5 conduct water pressure tests with multiple pressures and multiple stages.

[0038] In this embodiment, ①P 1 <P 2 <P 3 (P max ), and according to P 1 , P 2 , P 3 , P 2 , P 1 The water pressure test of 3 pressures and 5 stages was completed in sequence, and (P 1 ,Q1)(P 2 , Q2)(P 3 , Q3)(P 2 , Q4)(P 1 , Q5) are plotted in the PQ rectangular coordinate system with P as the ordinate (the ordinate: the origin is 0MPa, the maximum value is 1.0MPa, and 1cm represents 0.1MPa) and Q as the abscissa (the abscissa: the origin is 0L / min, the maximum value is 100L / min, and 1cm represents 10L / min). Use a solid line to connect the coordinate origin o (0L / min, 0MPa) and (P 1 , Q1) point connection, (P 1 , Q1) point and (P 2 , Q2) point connection, (P 2 , Q2) point and (P 3 , Q3) and use a dotted line to connect (P 3 , Q3) point and (P 2 , Q4) point connection, (P 2 , Q4) point and (P 1 , Q5) point connection, (P 1 , Q5) point is connected with point o to draw a PQ curve of the relationship between pressure and flow. If this PQ curve is one of the standard curves A, B, C, D, and E, then output: This water pressure test is successful. If this PQ curve is not one of the standard curves A, B, C, D, and E, then output:

[0039] The water pressure test was unsuccessful.

[0040] In this embodiment, ②P 1 <P 2 <P 3 (P max ), and according to P 1 , P 2 , P 3 The water pressure test of 3 pressures and 3 stages is completed in sequence. If q < 1, then the output is: This water pressure test is successful. Otherwise, the output is: This water pressure test is unsuccessful.

[0041] (3)P max ≤0.50MPa. Z >100L / min, then output: Check the plug, pipeline and joints for leaks, and perform water pressure test again according to technical requirements. Z ≤100L / min, the water pressure test was unsuccessful and needs to be repeated according to technical requirements.

[0042] The third case: 30m≤yx:

[0043] (1) When P max >1.2MPa; then the output is: the test is unsuccessful. It should be noted that the maximum test pressure value should be set to 1.0MPa before the test is performed.

[0044] (2) When 1.2MPa≥P max >0.90MPa; In this embodiment, ①P 1 <P 2 <P 3 (P max ), and according to P 1 , P 2 , P 3 , P 2 , P 1 The water pressure test of 3 pressures and 5 stages was completed in sequence, and (P 1 ,Q1)(P 2 , Q2)(P 3 , Q3)(P 2 ,Q4)(P 1 , Q5) are plotted in the PQ rectangular coordinate system with P as the ordinate (the ordinate: the origin is 0MPa, the maximum value is 1.0MPa, and 1cm represents 0.1MPa) and Q as the abscissa (the abscissa: the origin is 0L / min, the maximum value is 100L / min, and 1cm represents 10L / min). Use a solid line to connect the coordinate origin o (0L / min, 0MPa) and (P 1 , Q1) point connection, (P 1 , Q1) point and (P 2 , Q2) point connection, (P2 , Q2) point and (P 3 , Q3) and use a dotted line to connect (P 3 , Q3) point and (P 2 , Q4) point connection, (P 2 , Q4) point and (P 1 , Q5) point connection, (P 1 , Q5) point is connected with point o to draw a PQ curve of the relationship between pressure and flow. If this PQ curve is one of the standard curves A, B, C, D, and E, then output: the water pressure test is successful. If this PQ curve is not one of the standard curves A, B, C, D, and E, then output: the water pressure test is unsuccessful.

[0045] In this embodiment, ②P 1 <P 2 <P 3 (P max ), and according to P 1 , P 2 , P 3 The water pressure test of 3 pressures and 3 stages is completed in sequence. If q < 1, then the output is: This water pressure test is successful. Otherwise, the output is: This water pressure test is unsuccessful.

[0046] (3)P max ≤0.90MPa. Q Z >100l / min, then output: Check the plug, pipeline and joints for leaks, and perform water pressure test again according to technical requirements. Z ≤100l / min, the water pressure test was unsuccessful and needs to be repeated according to technical requirements.

[0047] Finally, it should be noted that the above content is only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Simple modifications or equivalent substitutions of the technical solution of the present invention by ordinary technicians in this field do not deviate from the essence and scope of the technical solution of the present invention.

Claims

1. A method for determining whether a water pressure test is qualified or not, characterized in that: The following steps are involved: Step 1: Collect and determine pre-test data; Step 2: Collect the data during the test and sort the data to obtain the maximum pressure P max And the corresponding flow Q Z ; Step 3: Calculate and output the test section length L based on the data of steps 1 and 2, and output q=Q Z / (P max ×L); Step 4: Conduct test evaluation based on the data from steps 1 to 3.

2. A method for determining whether a water pressure test is qualified or not according to claim 1, characterized in that: In step 1, the data before the test include the thickness of the covering layer at the drilling position x meters, the water pressure test position in the drilling depth range of y meters-z meters, and the test section length of the water pressure test is obtained: L=zy, in meters.

3. A method for determining whether a water pressure test is qualified or not according to claim 1, characterized in that: In step 2, the three pressures in the test process are represented by P1, P2, and P3, and the unit is MPa. The maximum pressure in the test is assigned to P max , assign the corresponding flow Q under the maximum pressure to the flow Q Z .

4. A method for determining whether a water pressure test is qualified or not according to claim 3, characterized in that: During the test, the pressure data is monitored and displayed by a pressure gauge, and the flow data is monitored and displayed by a water meter.

5. A method for determining whether a water pressure test is qualified or not according to claim 4, characterized in that: In step 4, when the data situation is the first situation: under the condition of yx<15m, When in P max >0.35MPa, the output test is unsuccessful; When 0.35MPa≥P max When the pressure is higher than 0.20MPa, water pressure tests at multiple pressures and stages are carried out according to P1, P2, P3, Q1, Q2, Q3, Q4 and Q5; When in P max ≤0.20MPa: If Q Z >100L / min, the output needs to check whether the plug, pipeline and its joints are leaking, and re-perform water pressure test according to technical requirements; if Q Z ≤100L / min, it means that the water pressure test is unsuccessful and it is necessary to repeat the water pressure test according to the technical requirements.

6. A method for determining whether a water pressure test is qualified or not according to claim 5, characterized in that: When 0.35MPa≥P max When the pressure is greater than 0.20MPa, the water pressure test process is as follows: When P1<P2<P3, P3 is P max , and when the water pressure test of 3 pressures and 5 stages is completed in the order of P1, P2, P3, P2, P1, the five points (P1, Q1) (P2, Q2) (P3, Q3) (P2, Q4) (P1, Q5) are plotted in the PQ rectangular coordinate system with P as the ordinate and Q as the abscissa, and the coordinate origin o is connected with the point (P1, Q1) by a solid line, the point (P1, Q1) is connected with the point (P2, Q2) and the point (P2, Q2) is connected with the point (P3, Q3) , use dotted lines to connect point (P3, Q3) with point (P2, Q4), point (P2, Q4) with point (P1, Q5), and point (P1, Q5) with point o, and draw a PQ curve of the relationship between pressure and flow. If the PQ curve is one of the standard curves of type A, type B, type C, type D, and type E, then the output is that the water pressure test is successful; if the PQ curve is not any of the standard curves of type A, type B, type C, type D, and type E, then the output is that the water pressure test is unsuccessful; When P1<P2<P3, P3 is P max , and when the three pressure and three stages of water pressure test are completed in the order of P1, P2, and P3, if q < 1, then the water pressure test is output as successful, otherwise the water pressure test is output as unsuccessful.

7. A method for determining whether a water pressure test is qualified or not according to claim 6, characterized in that: When the data situation is the first situation: under the condition of 15m≤yx<30m; When in P max >0.65MPa; the output test is unsuccessful; When 0.65MPa≥P max When the pressure is higher than 0.50MPa, water pressure tests at multiple pressures and stages are carried out according to P1, P2, P3, Q1, Q2, Q3, Q4 and Q5; When in P max When ≤0.50MPa, Q Z >100L / min, the output needs to check whether the plug, pipeline and its joints are leaking, and re-perform water pressure test according to technical requirements; Q Z ≤100L / min, the water pressure test was unsuccessful and needs to be repeated according to technical requirements.

8. A method for determining whether a water pressure test is qualified or not according to claim 7, characterized in that: When 0.65MPa≥P max When the pressure is greater than 0.50MPa, the water pressure test process is as follows: P1<P2<P3, at this time P3 is P max , and the water pressure test of 3 pressures and 5 stages is completed in the order of P1, P2, P3, P2, and P1. The five points (P1, Q1)(P2, Q2)(P3, Q3)(P2, Q4)(P1, Q5) are plotted in the PQ rectangular coordinate system with P as the ordinate and Q as the abscissa. A solid line is used to connect the origin o with the point (P1, Q1), the point (P1, Q1) with the point (P2, Q2), and the point (P2, Q2) with the point (P3, Q3). Then, use dotted lines to connect point (P3, Q3) with point (P2, Q4), point (P2, Q4) with point (P1, Q5), and point (P1, Q5) with point o, and draw a PQ curve of the relationship between pressure and flow. If the PQ curve is one of the standard curves A, B, C, D, and E, then the output is that the water pressure test is successful; if the PQ curve is not one of the standard curves A, B, C, D, and E, then the output is that the water pressure test is unsuccessful; P1<P2<P3, at this time P3 is P max , and the three pressure and three stage water pressure test is completed in the order of P1, P2, and P3. If q is less than 1, the water pressure test is output as successful; otherwise, the water pressure test is output as unsuccessful.

9. A method for determining whether a water pressure test is qualified or not according to claim 8, characterized in that: When the data situation is the first situation: under the condition of 30m≤yx; When P max >1.2MPa; the output test is unsuccessful; When 1.2MPa≥P max When the pressure is higher than 0.90MPa, water pressure tests at multiple pressures and stages are carried out according to P1, P2, P3, Q1, Q2, Q3, Q4 and Q5; When P max ≤0.90MPa; Q Z >100L / min,, then the output needs to check whether the plug, pipeline and its joints are leaking, and re-perform water pressure test according to technical requirements; Q Z ≤100L / min, the water pressure test is considered unsuccessful and needs to be repeated according to technical requirements.

10. A method for determining whether a water pressure test is qualified or not according to claim 9, characterized in that: When 1.2MPa≥P max When the pressure is greater than 0.90MPa, the water pressure test process is as follows: When P1<P2<P3, P3 is P max , and the water pressure test of 3 pressures and 5 stages is completed in the order of P1, P2, P3, P2, and P1. The five points (P1, Q1)(P2, Q2)(P3, Q3)(P2, Q4)(P1, Q5) are plotted in the PQ rectangular coordinate system with P as the ordinate and Q as the abscissa. The coordinate origin o is connected with the point (P1, Q1) by a solid line, the point (P1, Q1) is connected with the point (P2, Q2), and the point (P2, Q2) is connected with the point (P3, Q3). , use dotted lines to connect point (P3, Q3) with point (P2, Q4), point (P2, Q4) with point (P1, Q5), and point (P1, Q5) with point o, and draw a PQ curve of the relationship between pressure and flow; if the PQ curve is one of the standard curves of type A, type B, type C, type D, and type E, then output that the water pressure test is successful; if the PQ curve is not any of the standard curves of type A, type B, type C, type D, and type E, then output that the water pressure test is unsuccessful; When P1<P2<P3, P3 is P max , and the water pressure test of 3 stages with 3 pressures is completed in the order of P1, P2, and P3. If q < 1, then the water pressure test is output as successful; otherwise, the water pressure test is output as unsuccessful.

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