Multi-fork communicating pipe for establishing hydrostatic leveling network, hydrostatic leveling network and closed-loop data processing method

Abstract

The embodiment of the invention discloses a multi-fork communicating pipe for building a hydrostatic leveling network, the hydrostatic leveling network and a closed loop data processing method.The multi-fork communicating pipe comprises a shell, the interior of the shell is provided with a cavity, the side face of the shell is provided with at least three through holes communicated with the cavity in the circumferential direction, and the through holes are communicated with the cavity; each through hole extends outwards to form a liquid pipe connector; an exhaust hole communicated with the cavity is formed in the top surface of the shell; the liquid pipe is communicated with the cavity through the liquid pipe connector; the sealing assembly is arranged in the liquid pipe connector and used for ensuring that the liquid pipe is in sealed connection with the liquid pipe connector; the elastic locking assembly is coaxially arranged at the tail end of the sealing assembly and is used for limiting the axial movement of the liquid pipe in a connection state; and the exhaust hole plug is used for plugging the exhaust hole. According to the embodiment of the invention, the static leveling measurement can form a net-shaped structure through the multi-fork communicating pipe, a closed leveling ring is formed, the closing error is calculated, the closing error is reasonably distributed, the influence of an observation error on a result is reduced, and the measurement efficiency is improved.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of intelligent surveying and mapping technology, and specifically to a multi-fork connecting pipe for forming a static leveling network, a static leveling network, and a closed-loop data processing method. Background Art

[0002] With the application of intelligent sensors in the field of modern surveying and mapping, the engineering application of automatic deformation monitoring of geological disasters and buildings has gradually been paid attention to. Among them, the static level is a high-precision settlement monitoring instrument, which is widely used in building settlement monitoring in many fields such as dams, towers, high-speed railways and foundation pit settlement.

[0003] The traditional static level uses a single liquid tube to connect two static level sensors, which can only perform single-point measurement and cannot connect multiple sensors at the same time for multi-point monitoring, so its measurement range is limited. It is impossible to achieve comprehensive and accurate monitoring of settlement and deformation monitoring of large-scale projects or complex sites. At the same time, since the static level sensors connected by liquid tubes can only perform single-point measurement, the installation and debugging of each sensor need to be carried out separately, which increases the difficulty and workload of installation and debugging, and is not conducive to the real-time and transmission efficiency of monitoring data. Summary of the invention

[0004] To this end, an embodiment of the present invention provides a multi-branch connecting pipe, a static leveling network and a closed-loop data processing method for establishing a static leveling network, so as to solve the technical problems that the prior art can only perform single-point measurement, cannot simultaneously connect multiple sensors for multi-point monitoring, and has a limited measurement range.

[0005] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0006] According to a first aspect of an embodiment of the present invention, there is provided a multi-fork connecting pipe for forming a static leveling network, characterized in that it comprises:

[0007] A shell 2, wherein the shell 2 has a cavity inside, and at least three through holes communicating with the cavity are opened on the side of the shell 2 along the circumferential direction, each through hole extending outward to form a liquid pipe interface 6; and an exhaust hole 1 communicating with the cavity is opened on the top surface of the shell 2;

[0008] A liquid pipe, connected to the cavity through the liquid pipe interface 6;

[0009] A sealing assembly 3, disposed in the liquid pipe interface 6, for ensuring a sealed connection between the liquid pipe and the liquid pipe interface 6;

[0010] An elastic locking assembly, coaxially mounted on the end of the sealing assembly 3, for limiting the axial movement of the liquid pipe when the liquid pipe is connected to the liquid pipe interface 6;

[0011] The exhaust hole plug is used to seal the exhaust hole 1.

[0012] Furthermore, the sealing component 3 adopts a rubber ring, the outer diameter of the rubber ring is matched with the inner diameter of the liquid pipe interface 6, and the inner diameter of the rubber ring is matched with the outer diameter of the liquid pipe.

[0013] Furthermore, the elastic locking assembly consists of a liquid pipe interface 6 and a retaining spring 4; the liquid pipe interface 6 is a hollow cylinder made of a rigid material, the inner diameter of the liquid pipe interface 6 is the same as the inner diameter of the rubber ring, and a circle of grooves 5 are provided on the inner wall of the cylinder of the liquid pipe interface 6 for placing the retaining spring 4; the retaining spring 4 is a toothed ring structure, the inner diameter of the retaining spring 4 is smaller than the inner diameter of the rubber ring, so that the retaining spring 4 is limited in the groove 5 and the inner circle of the retaining spring 4 protrudes out of the groove 5, thereby limiting the axial movement of the liquid pipe after the liquid pipe is inserted.

[0014] Furthermore, the main body of the shell 2 is in the shape of a cube, and each side is provided with a through hole and a corresponding liquid pipe interface 6; the multi-branch connecting pipe also includes a liquid pipe plug for blocking a certain liquid pipe interface 6 as needed.

[0015] Furthermore, the cavity is a spherical hole, and the through hole and the exhaust hole 1 are both circular holes.

[0016] Furthermore, the exhaust hole plug is a conical rubber rod, and the outer diameter of the conical rubber rod is matched with the inner diameter of the exhaust hole 1.

[0017] According to a second aspect of an embodiment of the present invention, a static leveling network is provided, comprising a reference point and a plurality of observation points, wherein the reference point and each observation point are provided with a corresponding static level; and it is characterized in that the static leveling network is provided with at least one multi-fork connecting pipe, each of the multi-fork connecting pipe is connected with at least three static levels, so that a closed leveling loop exists in the entire static leveling network.

[0018] According to a third aspect of an embodiment of the present invention, a closed-loop data processing method applied to a static leveling network is provided, comprising:

[0019] The height difference of each observation point is measured using the benchmark point and the observation point;

[0020] When there is sedimentation at an observation point, wait for the liquid flow to balance and detect the height difference between two adjacent observation points in each closed loop;

[0021] Calculating the closing error of the closed loop using the height difference;

[0022] Obtaining a difference limit threshold using a preset leveling level, and determining whether the closure error exceeds the difference limit threshold;

[0023] If it does not exceed the limit, the closure error is distributed in the opposite direction on average to make the closure error of the closed loop zero;

[0024] If it exceeds the limit, there will be gross errors in this measurement, the results will be unsatisfactory and need to be abandoned and remeasured.

[0025] Further, the closure difference of the closed loop is obtained by calculating the height difference, including:

[0026] Add up all the height differences in the current closed loop to obtain the closure difference of the closed loop.

[0027] Furthermore, the closure error is averaged and reversely distributed to make the closure error of the closed loop zero, including:

[0028] Add the height differences and correction numbers within the closed loop to make the closing error of the closed loop zero;

[0029] The calculation formula of the correction number is:

[0030]

[0031] Among them, v is the correction number, d h is the closure error, and α is the height difference of the closed loop.

[0032] The embodiments of the present invention have the following advantages:

[0033] The multi-forked connecting tube shell in the embodiment of the present invention has a cavity inside the shell, and the side surface of the shell is provided with at least three through holes connected to the cavity along the circumferential direction, and each through hole extends outward to form a liquid pipe interface; the top surface of the shell is provided with an exhaust hole connected to the cavity; the liquid pipe is connected to the cavity through the liquid pipe interface; the sealing component is arranged in the liquid pipe interface to ensure the sealed connection between the liquid pipe and the liquid pipe interface; the elastic locking component is coaxially installed at the end of the sealing component to limit the axial movement of the liquid pipe when the liquid pipe is connected to the liquid pipe interface; the exhaust hole plug is used to block the exhaust hole. The embodiment of the present invention can form a network structure of static leveling measurement through the multi-forked connecting tube, form a closed leveling ring and calculate the closing difference. If the closing difference is within the limit, the closing difference is reasonably distributed to reduce the influence of observation error on the result; the multi-forked connecting tube is used to make the liquid flow from multiple directions, thereby improving the measurement efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation methods of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the implementation methods or the description of the prior art. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0035] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0036] Figure 1 A schematic diagram of the structure of a multi-fork connecting pipe provided in an embodiment of the present invention;

[0037] Figure 2 Three views of a multi-fork connecting pipe provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the main parts of the multi-fork connecting pipe provided in an embodiment of the present invention;

[0039] Figure 4 A cross-sectional view of a multi-fork connecting pipe provided in an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of an existing static leveling route provided by an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of a static leveling network composed of multi-forked connecting pipes provided in an embodiment of the present invention.

[0042] 1. Exhaust hole; 2. Shell; 3. Sealing assembly; 4. Circlip; 5. Groove; 6. Liquid pipe interface. DETAILED DESCRIPTION

[0043] The following is a description of the implementation of the present invention by specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0044] The static level works based on the "connecting tube" principle: after liquid is injected into the tube with openings at both ends connected to the atmosphere, the liquid will eventually remain at the same horizontal plane under the action of atmospheric pressure and gravity. By measuring the changes in the measuring liquid level, the height difference between adjacent measuring points can be obtained.

[0045] Since the static level (installed at the observation point) has only an inlet and an outlet, the prior art method is to connect the sensors of the reference point and the observation point through a liquid pipe and an air pipe to form a branch leveling route, such as Figure 5 As shown, Represents the reference point, ○ represents the observation point, and the arrow represents the direction of liquid flow. The existing technical method cannot form a network structure, does not have the conditions for calculating the closure error, and cannot be strictly adjusted according to the classical leveling network, so that the difference between the two height differences between the observation point and the reference point, that is, the settlement value of the observation point, is greatly affected by the error.

[0046] For automatic static level, when two static level sensors are connected by liquid pipe, only single-point measurement can be performed, and multiple sensors cannot be connected at the same time for multi-point monitoring. Therefore, its measurement range is limited, and it is impossible to achieve comprehensive and accurate monitoring of settlement and deformation monitoring of large-scale projects or complex sites. At the same time, since the static level sensor connected by liquid pipe can only perform single-point measurement, the installation and debugging of each sensor need to be carried out separately, which increases the difficulty and workload of installation and debugging, and is not conducive to the real-time and transmission efficiency of monitoring data. In order to overcome the above shortcomings, a multi-fork interface can be used to connect multiple liquid pipes and then connect multiple static level sensors to achieve multi-point monitoring and data acquisition, which can not only improve the measurement efficiency, but also reduce the difficulty and workload of installation and debugging.

[0047] Based on the above technical background, the present invention mainly solves the difficulty of connecting multiple sensors in the automatic static leveling measurement system. The application of this technical invention can simultaneously connect multiple static leveling sensors to achieve multi-point monitoring and data acquisition, which not only improves the measurement efficiency, but also reduces the difficulty and workload of installation and debugging.

[0048] In order to solve the above-mentioned technical problems that only single-point measurement can be performed, multiple sensors cannot be connected simultaneously for multi-point monitoring, and the measurement range is limited.

[0049] Example 1

[0050] refer to Figures 1 to 3 The embodiment of the present invention discloses a multi-fork connecting pipe for forming a static leveling network, which is characterized by comprising:

[0051] A shell 2, wherein the shell 2 has a cavity inside, and at least three through holes communicating with the cavity are opened on the side of the shell 2 along the circumferential direction, each through hole extending outward to form a liquid pipe interface 6; and an exhaust hole 1 communicating with the cavity is opened on the top surface of the shell 2;

[0052] A liquid pipe, connected to the cavity through the liquid pipe interface 6;

[0053] A sealing assembly 3, disposed in the liquid pipe interface 6, for ensuring a sealed connection between the liquid pipe and the liquid pipe interface 6;

[0054] An elastic locking assembly, coaxially mounted on the end of the sealing assembly 3, for limiting the axial movement of the liquid pipe when the liquid pipe is connected to the liquid pipe interface 6;

[0055] The exhaust hole plug is used to seal the exhaust hole 1.

[0056] refer to Figure 3 , from left to right are the structural schematic diagrams of the sealing assembly 3, the retaining spring 4, the liquid pipe interface 6, the exhaust hole plug, the liquid pipe plug and the liquid pipe.

[0057] Furthermore, the sealing component 3 adopts a rubber ring, the outer diameter of the rubber ring is matched with the inner diameter of the liquid pipe interface 6, and the inner diameter of the rubber ring is matched with the outer diameter of the liquid pipe.

[0058] Furthermore, the elastic locking assembly consists of a liquid pipe interface 6 and a retaining spring 4; the liquid pipe interface 6 is a hollow cylinder made of a rigid material, the inner diameter of the liquid pipe interface 6 is the same as the inner diameter of the rubber ring, and a circle of grooves 5 are provided on the inner wall of the cylinder of the liquid pipe interface 6 for placing the retaining spring 4; the retaining spring 4 is a toothed ring structure, the inner diameter of the retaining spring 4 is smaller than the inner diameter of the rubber ring, so that the retaining spring 4 is limited in the groove 5 and the inner circle of the retaining spring 4 protrudes out of the groove 5, thereby limiting the axial movement of the liquid pipe after the liquid pipe is inserted.

[0059] Furthermore, the main body of the shell 2 is in the shape of a cube, and each side is provided with a through hole and a corresponding liquid pipe interface 6; the multi-branch connecting pipe also includes a liquid pipe plug for blocking a certain liquid pipe interface 6 as needed.

[0060] Furthermore, the cavity is a spherical hole, and the through hole and the exhaust hole 1 are both circular holes.

[0061] Furthermore, the exhaust hole plug is a conical rubber rod, and the outer diameter of the conical rubber rod is matched with the inner diameter of the exhaust hole 1.

[0062] refer to Figure 4 , the first column is a three-dimensional model diagram of a multi-fork interface connecting pipe, the second column is a longitudinal cross-sectional diagram of a multi-fork interface connecting pipe, and the third column is a transverse cross-sectional diagram of a multi-fork interface connecting pipe. The upper model in the first column is a basic model diagram of a multi-fork interface connecting pipe, and the lower model is a model diagram of a multi-fork interface connecting pipe after adding a liquid pipe, a liquid pipe plug, and a vent plug.

[0063] 1. Exhaust hole

[0064] Note: The exhaust hole 1 is a circular hole with an inner diameter of 4 mm, and is sealed with a conical rubber rod with a diameter of 4 mm and a length of 3 cm.

[0065] Function: When liquid is injected into the empty shell of the multi-fork connecting pipe, bubbles will inevitably penetrate in during the process of injecting liquid. After the liquid flows through the empty shell, the bubbles will gather on the upper part of the shell 2. Pull out the rubber rod that blocks the exhaust hole 1, and the air will be discharged through the exhaust hole 1. When all the liquid flows out of the exhaust hole 1, it indicates that the air in the device and its pipeline in the measuring area has been removed, so that the pressure transmitted by the liquid is not affected by the gas, thereby improving the monitoring accuracy.

[0066] 2. Shell

[0067] Description: The outer part of the shell 2 is a cube with a side length of 3 cm, and there is a spherical hole with a diameter of 3 cm inside. The four side surfaces and the upper bottom surface have circular holes with diameters of 10 mm and 4 mm respectively, which directly pass through the hole inside the shell 2.

[0068] Function: To store liquids.

[0069] 3. Sealing components

[0070] Note: The sealing component 3 is a rubber ring with a length of 2 cm, an inner diameter of 10 mm and an outer diameter of 12 mm.

[0071] Function: ① Under liquid pressure, the sealing component 3 will expand to prevent liquid leakage at the interface; ② Prevent air from entering the three-way connection device.

[0072] 4. Circlip

[0073] Description: The retaining spring 4 is a 304 stainless steel toothed ring structure with a thickness of 1 mm, an outer diameter of 11 mm, and an inner diameter of 9 mm, and is retractable.

[0074] Function: When the liquid pipe is inserted into the device, since the inner diameter of the toothed structure of the retaining spring 4 is smaller than the inner diameter of the liquid pipe, the retaining spring 4 will be locked on the liquid pipe to prevent the liquid pipe from axial movement, thus playing the role of fixing the liquid pipe.

[0075] 5. Liquid pipe interface

[0076] Description: The liquid pipe interface 6 is a 304 stainless steel hollow cylinder with an inner diameter of 10 mm. A groove 5 with a thickness of 1 mm is opened inside the cylinder 2 mm away from the edge. Since the clamping spring 4 is retractable, the clamping spring 4 can be placed in the groove 5 inside the liquid pipe interface 6.

[0077] Function: Place the retaining spring 4 to fix the retaining spring 4.

[0078] 6. Plug and liquid pipe

[0079] Description: The vent plug is a conical rubber rod with a diameter of 4mm and a length of 3cm; the liquid pipe plug is a conical rubber rod with a diameter of 10mm and a length of 3.5cm; the liquid pipe is a PU tube with an outer diameter of 10mm and an inner diameter of 8mm.

[0080] Example 2

[0081] refer to Figure 6 The present invention discloses a static leveling network, including a reference point and multiple observation points, wherein the reference point and each observation point are provided with corresponding static levels; it is characterized in that the static leveling network is provided with at least one multi-fork connecting pipe, each of the multi-fork connecting pipe is connected with at least three static levels, so that the entire static leveling network has a closed leveling loop.

[0082] The sensors of the benchmark point and the observation point are connected by using multi-fork connecting pipes to form a leveling network. The benchmark point and two adjacent observation points form a closed leveling route, and the height difference closure error is theoretically zero. The most probable value of the height difference from the observation point to the benchmark point can be obtained by adjustment, and the error can be reasonably distributed to reduce the impact of the error, thereby reducing the impact of the error on the settlement value of the observation point. On the other hand, the use of multi-fork connecting pipes speeds up the efficiency of liquid flow, so that the horizontal plane of the entire monitoring network quickly reaches the same height.

[0083] Example 3

[0084] The present invention provides a closed-loop data processing method applied to a static leveling network, comprising: using a reference point and an observation point to measure the height difference of each observation point; when an observation point settles, waiting for liquid flow balance, and detecting the height difference between two adjacent observation points in each closed loop; using the height difference to calculate the closure difference of the closed loop; using a preset leveling level to obtain a difference limit threshold, and judging whether the closure difference exceeds the difference limit threshold; if not, averaging and reversely distributing the closure difference to make the closure difference of the closed loop zero; if exceeded, there is a gross error in this measurement, the result is unqualified, and it needs to be abandoned and remeasured.

[0085] Further, using the height difference to calculate and obtain the closure difference of the closed loop includes: adding all the height differences in the current closed loop to obtain the closure difference of the closed loop.

[0086] Furthermore, the closure error is distributed in an average reverse manner to make the closure error of the closed loop zero, including: adding each height difference in the closed loop to the correction number to make the closure error of the closed loop zero; the calculation formula of the correction number is:

[0087]

[0088] Among them, v is the correction number, d h is the closure error, and α is the height difference of the closed loop.

[0089] like Figure 6As shown, the four forks are connected to each other through the red multi-fork connecting pipe in the middle to form a sealed space; according to actual use, a rubber plug can be used to block any one of the forks to form a three-fork connecting pipe; the multi-fork connecting pipe can be used to form the following Figure 6 The static leveling grid shown.

[0090] represents the reference point, ○ represents the observation point, Indicates a four-way connecting pipe. It represents a three-way connecting pipe. Each arrow represents a fork. The dotted line connects the observation points to form a closed leveling loop.

[0091] Assume that 10 static leveling monitoring points need to be set up in the monitoring area, J is used as a fixed reference point, and the reference point needs to be higher than other observation points. The height differences of each observation point measured for the first time are Y i (i=1…10), i represents the point number.

[0092] The four multi-fork interconnection interfaces in the middle need to connect various observation points. Figure 6 It can be seen that three closed loop figures can be formed: C1-C4-C6-C3-C1, C2-C5-C7-C4-C2; and C6-C7-C 10 -C9-C8-C6.

[0093] Assuming that sedimentation occurs at an observation point, after the liquid flow is balanced, taking the closed loop C1-C4-C6-C3-C1 as an example, the height differences between two adjacent measurement points in the closed loop are measured to be h 1,4 ,h 4,6 ,h 6,3 ,h 3,1 .

[0094] Due to the existence of observation error, the closure error d of the closed loop can be calculated h for:

[0095] h 1,4 +h 4,6 +h 6,3 +h 3,1 =d h

[0096] If d h If the limit is not exceeded (the size of the limit depends on the leveling level), the closure error can be evenly distributed in the opposite direction: add a correction number to each height difference on the closed loop:

[0097]

[0098] Among them, 4 is the number of height differences on the closed loop.

[0099] Right now

[0100]

[0101] After these processes, the corrected height difference is taken as the final result; and the closed loop C1-C4-C6-C3-C1 satisfies The same can be done for other closed loops.

[0102] The embodiments of the present invention have the following beneficial effects:

[0103] The application of multi-fork connecting pipes can form a network structure for static leveling measurements, form a closed leveling loop and calculate the closure error. If the closure error is within the limit, the closure error is reasonably distributed to reduce the impact of observation errors on the results; if the closure error exceeds the limit, it is considered that there is a gross error in this measurement, the results are unqualified, and the measurement can be abandoned and re-measured; on the other hand, the present invention uses multi-fork connecting pipes to allow liquid to flow from multiple directions, thereby improving measurement efficiency.

[0104] The existing static leveling system cannot be networked, cannot detect gross errors and allocation errors, and has low measurement efficiency.

[0105] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A multi-fork connecting pipe for forming a static leveling network, characterized in that: include: A shell (2), wherein the shell (2) has a cavity inside, and at least three through holes in communication with the cavity are formed on the side surface of the shell (2) along the circumferential direction, each through hole extending outward to form a liquid pipe interface (6); and an exhaust hole (1) in communication with the cavity is formed on the top surface of the shell (2); A liquid pipe, connected to the cavity through the liquid pipe interface (6); A sealing assembly (3) is arranged in the liquid pipe interface (6) and is used to ensure a sealed connection between the liquid pipe and the liquid pipe interface (6); An elastic locking assembly, coaxially mounted on the end of the sealing assembly (3), and used to limit the axial movement of the liquid pipe when the liquid pipe is connected to the liquid pipe interface (6); An exhaust hole plug is used to seal the exhaust hole (1).

2. The multi-fork connecting pipe for forming a static leveling network according to claim 1, characterized in that: The sealing component (3) adopts a rubber ring, the outer diameter of the rubber ring is matched with the inner diameter of the liquid pipe interface (6), and the inner diameter of the rubber ring is matched with the outer diameter of the liquid pipe.

3. The multi-fork connecting pipe for forming a static leveling network according to claim 2, characterized in that: The elastic locking assembly is composed of a liquid pipe interface (6) and a retaining spring (4); the liquid pipe interface (6) is a hollow cylinder made of a rigid material, the inner diameter of the liquid pipe interface (6) is the same as the inner diameter of the rubber ring, and a circle of grooves (5) are provided on the inner wall of the cylinder of the liquid pipe interface (6) for accommodating the retaining spring (4); the retaining spring (4) is a toothed ring structure, the inner diameter of the retaining spring (4) is smaller than the inner diameter of the rubber ring, so that the retaining spring (4) is limited in the groove (5) and the inner circle of the retaining spring (4) protrudes out of the groove (5), thereby limiting the axial movement of the liquid pipe after the liquid pipe is inserted.

4. The multi-fork connecting pipe for forming a static leveling network according to claim 1, characterized in that: The main body of the shell (2) is in the shape of a cube, and each side surface is provided with a through hole and a corresponding liquid pipe interface (6); the multi-fork connecting pipe also includes a liquid pipe plug for sealing a certain liquid pipe interface (6) as required.

5. The multi-fork connecting pipe for forming a static leveling network according to claim 1, characterized in that: The cavity is a spherical hole, and the through hole and the exhaust hole (1) are both circular holes.

6. The multi-forked connecting pipe for forming a static leveling network according to claim 1, characterized in that: The exhaust hole plug is a conical rubber rod, and the outer diameter of the conical rubber rod is matched with the inner diameter of the exhaust hole (1).

7. A static leveling network, comprising a reference point and a plurality of observation points, wherein the reference point and each observation point are provided with a corresponding static level; characterized in that: The static leveling network is provided with at least one multi-fork connecting pipe as claimed in claim 1, and each of the multi-fork connecting pipes is connected to at least three static levels, so that a closed leveling ring exists in the entire static leveling network.

8. The closed-loop data processing method of the static leveling network as claimed in claim 7, comprising: The height difference of each observation point is measured using the benchmark point and the observation point; When there is sedimentation at an observation point, wait for the liquid flow to balance and detect the height difference between two adjacent observation points in each closed loop; Calculating the closing error of the closed loop using the height difference; Obtaining a difference limit threshold using a preset leveling level, and determining whether the closure error exceeds the difference limit threshold; If it does not exceed the limit, the closure error is distributed in the opposite direction on average to make the closure error of the closed loop zero; If it exceeds the limit, there will be gross errors in this measurement, the results will be unsatisfactory and need to be abandoned and remeasured.

9. The closed-loop data processing method of the static leveling network according to claim 8, characterized in that: The closure error of the closed loop is obtained by calculating the height difference, including: Add up all the height differences in the current closed loop to obtain the closure difference of the closed loop.

10. The closed-loop data processing method of the static leveling network according to claim 9, characterized in that: Average reverse distribution of closure errors to make the closure error of the closed loop zero, including: Add the height differences and correction numbers within the closed loop to make the closing error of the closed loop zero; The calculation formula of the correction number is: Among them, v is the correction number, d h is the closure error, and α is the height difference of the closed loop.

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