A device for opening a hole in a water pipe without stopping water supply

Abstract

The present application relates to the technical fields of transducer installation, in particular to a kind of transducer installation with pressure opening device without stopping water, comprising: base installation unit, including arc generator for welding the base of transducer in corresponding installation position, fixed assembly for providing pre-tightening force to transducer, ceramic heating ring for compensating the heat dissipation difference caused by corrosion of water conveying pipeline inner wall by applying heat;Pressure tapping unit, including driving motor, drill rod for drilling water conveying pipeline, sealing sleeve for realizing sealing, and ball valve for controlling water flow speed;Detection unit, for obtaining the temperature value of the vibration frequency of sealing sleeve and base;Control unit, for determining the output power of ceramic heating ring according to the voltage drop amount in monitoring time period, determining the opening of ball valve according to the vibration frequency of sealing sleeve during the process of drill rod passing through ball valve, and determining the pre-tightening force of fixed assembly according to temperature value.The present application realizes the improvement of transducer installation efficiency.

Description

Technical Field

[0001] This invention relates to the field of transducer installation technology, and in particular to a non-stop water tapping device for pressurized installation of transducers. Background Technology

[0002] In water supply, heating, and industrial fluid transport pipeline systems, the transducers of flow metering devices typically need to be installed inside the water pipeline for accurate measurement. However, in existing technologies, in-service pipelines, especially older water supply pipelines, generally have varying degrees of corrosion on their inner walls. The corroded areas have thinner walls, different thermal conductivity characteristics compared to the base metal, and the corrosion distribution is non-uniform along the water flow direction. During base welding, due to the lack of intelligent sensors capable of detecting the internal corrosion state, operators cannot perceive the differences in heat dissipation characteristics at the welding location, leading to discrepancies between the welding heat input and the internal water flow heat dissipation. Mismatch leads to uneven cooling rates in the molten pool, resulting in anisotropic shrinkage in the weld metal and residual stress. This residual stress may reduce weld strength and cause micro-geometric warping at the contact surface between the base and the water pipe. This micro-geometric warping can cause eccentric vibration of the drill rod during subsequent pressurized drilling. Eccentricity causes the drill rod to periodically collide with the sealing sleeve and ball valve core during high-speed rotation, accelerating component wear. Therefore, there is an urgent need for a transducer pressurized non-stop drilling device that uses intelligent sensors to sense the welding status and the drilling process of the drill rod.

[0003] Chinese Patent Publication No. CN119063807A discloses a centering and installation device for a transducer sleeve in a pipeline ultrasonic flow meter, comprising: a body including a lead screw, a moving device mounted on the lead screw, and a visual recognition device mounted on the moving device; the moving device including a slider, an electric push rod mounted on the slider, and a positioning sleeve mounted at the end of the electric push rod; the visual recognition device for collecting the position and tilt angle information of the body and feeding it back to the control system; grippers mounted at both ends of the body for fixing the body inside the ultrasonic flow meter body; and a control system for controlling the movement of the transducer sleeve according to the received feedback information. The movement and rotation angle of the moving device are controlled to align the positioning sleeve with the transducer sleeve fixing hole. It can be seen that the alignment and installation device for the transducer sleeve in the pipeline ultrasonic flow meter has several problems. Because the thermal resistance of the corroded area inside the water pipeline is lower than that of the normal water pipeline wall, the water flow carries away heat from the inner wall of the water pipeline during welding, amplifying the difference in cooling rates in different directions during the solidification of the weld pool. This causes the weld metal to shrink, leading to periodic mechanical collisions when the drill rod is inserted into the ball valve. Additionally, residual welding stress can cause localized condensation buildup during transducer operation. Summary of the Invention

[0004] To address these issues, the present invention provides a transducer installation device that allows for continuous water supply during installation. This device overcomes the problems in the prior art where the thermal resistance of the corroded area inside the water pipe is lower than that of the normal water pipe wall. Consequently, during the welding of the base, the water flow carries away the heat from the inner wall of the water pipe, amplifying the difference in cooling rates in different directions during the solidification of the weld pool. This causes the weld metal to shrink, leading to periodic mechanical collisions when the drill rod is inserted into the ball valve. Additionally, residual welding stress poses a risk of localized condensation buildup during transducer operation.

[0005] To achieve the above objectives, the present invention provides a transducer pressurized installation non-stop water tapping device, comprising: The base mounting unit is used to fix the transducer to the corresponding mounting position on the outer wall of the water supply pipe. It includes an arc generator for welding the base of the transducer to the corresponding mounting position, a fixing component connected to the base for providing pre-tightening force to the transducer, and a ceramic heating coil connected to the base to compensate for the heat dissipation difference caused by corrosion of the inner wall of the water supply pipe by applying heat to the base. A pressurized drilling unit, which is connected to the base mounting unit, is used to drill holes in the water supply pipeline without interrupting the water supply. It includes a drive motor, a drill rod fixedly connected to the drive rod of the drive motor for drilling holes in the water supply pipeline, a ball valve threadedly connected to the base for controlling the water flow interruption and flow rate, and a sealing sleeve threadedly connected to the ball valve for achieving a seal. The detection unit is connected to the base mounting unit and the pressurized opening unit respectively, and is used to obtain the vibration frequency of the sealing sleeve during the process of drilling pipe passing through the ball valve and several temperatures of the base during the natural cooling period. The control unit, which is connected to the base mounting unit, the pressurized opening unit, and the detection unit respectively, is used to determine the output power of the ceramic heating ring based on the voltage drop of the arc generator during the monitoring period, determine the ball valve opening based on the vibration frequency of the sealing sleeve, and determine the preload of the fixing component based on the temperature fluctuation amplitude of the base.

[0006] Furthermore, the detection unit includes: A vibration sensor is disposed on the outer wall of the sealing sleeve to obtain the vibration frequency of the sealing sleeve; A temperature sensor, connected to the base, is used to obtain several temperatures of the base.

[0007] Furthermore, the control unit is used to determine that the corrosion of the inner wall of the water supply pipe at the corresponding installation location does not meet the requirements for the effect of shrinkage uniformity during the solidification of the weld pool if the voltage drop of the arc generator during the monitoring period is greater than a preset drop amount, and to increase the output power of the ceramic heating ring.

[0008] Furthermore, the output power of the ceramic heating coil is positively correlated with the voltage drop, wherein, The voltage drop is the difference between the voltage value of the arc generator at the beginning and the voltage value of the arc generator at the end of the monitoring period.

[0009] Furthermore, the control unit is connected to the vibration sensor and the ball valve respectively, and is used to determine that the impact of the micro-geometric warping of the base caused by the residual stress of the base welding on the stability of the drill rod rotation drilling process does not meet the requirements if the vibration frequency of the sealing sleeve during the drill rod passing through the ball valve is greater than the preset vibration frequency, and to reduce the opening of the ball valve.

[0010] Furthermore, the opening degree of the ball valve is negatively correlated with the vibration frequency of the sealing sleeve.

[0011] Furthermore, the control unit is connected to the temperature sensor and the fixing component respectively, and is used to determine that the effect of condensate accumulation during the operation of the transducer on the electrical connection stability of the transducer does not meet the requirements if the temperature fluctuation of the base after the end of the monitoring period is greater than the preset temperature fluctuation range, and to increase the preload of the fixing component.

[0012] Furthermore, the fixing assembly includes a fixing plate, a connecting plate, and an electric push rod for providing axial thrust to the fixing assembly to adjust the preload. The fixed disk and the connecting disk are movably connected along the transducer axis, and the electric push rod adjusts the preload by driving the fixed disk to move axially.

[0013] Furthermore, the preload force is positively correlated with the temperature fluctuation amplitude.

[0014] Furthermore, the temperature fluctuation range of the base is the difference between the maximum temperature and the minimum temperature of the base during the natural cooling period.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention addresses the technical problem of uneven shrinkage during the solidification of weld pool caused by corrosion of the inner wall of water pipelines. The uneven shrinkage during weld pool solidification is caused by the reduced wall thickness and the difference in thermal conductivity between iron oxide and the base material in the corroded area of ​​the water pipeline, resulting in a decrease in thermal resistance in the corroded area. The rate at which water flows away heat in the water pipeline is higher than in the uncorroded area, which in turn causes inconsistent cooling rates in different directions of the weld pool, leading to anisotropic shrinkage of the weld metal and the formation of residual welding stress. By acquiring the voltage drop of the arc generator during the monitoring period, when the voltage drop exceeds the preset drop, it is determined that the corrosion does not meet the requirements for uniform shrinkage. The control unit then increases the output power of the ceramic heating coil to actively compensate for the excessively rapid heat dissipation of the corroded area, slowing down its cooling rate and making the cooling in the circumferential direction of the base more uniform. This suppresses anisotropic shrinkage during weld pool solidification, reduces the generation of residual welding stress, improves the stability of the base, and thus improves the installation efficiency of the transducer.

[0016] Furthermore, this invention addresses the technical problem of microscopic geometric warping of the base caused by residual stress from base welding, which leads to mechanical collisions between the drill rod and the valve core of the ball valve. The mechanical collisions are caused by the micron-level geometric warping of the base flange surface, which causes eccentricity between the drill rod's rotation axis and the water pipeline axis. When the drill rod rotates at high speed through the ball valve, the eccentricity causes periodic mechanical collisions between the drill rod and the valve core, resulting in an increased vibration frequency of the sealing sleeve. These mechanical collisions exacerbate wear in the contact area between the drill rod and the ball valve core. In continuous operation under pressure, damage to the valve core can prevent complete sealing, posing a risk of seal failure during transducer installation. The hydrodynamic bearing effect is formed when the control unit reduces the ball valve opening, causing the drill valve... With the water flow channel cross-section at the inlet reduced, the water flow velocity through the valve inlet increases while the original water pressure in the water pipeline remains unchanged. When the high-speed fluid flows in the annular gap between the drill rod and the valve core, due to the fluid viscosity and the annular gap between the drill rod and the valve core, the flow cross-sectional area is large, the flow velocity is relatively low, and the pressure is high in the wide gap. When the fluid enters the narrow gap, the cross-sectional area decreases. According to the continuity equation, the flow velocity increases, which in turn generates a pressure distribution along the radial direction pointing towards the drill rod axis. This, in turn, generates a fluid restoring force pointing towards the axis of the water pipeline. The pressure causes the drill rod to return to the center of the axis. The fluid restoring force counteracts the mechanical eccentricity caused by welding stress, improving the stability of the drill rod rotating at high speed through the ball valve, thereby improving the safety of the transducer installation process.

[0017] Furthermore, this invention addresses the technical problem of uneven base temperature caused by residual stress, which in turn leads to the risk of localized condensation buildup during transducer operation. The cause of this localized condensation buildup is the microscopic warping of the base due to residual stress, preventing tight contact between the base and the connecting plate, resulting in micro-gaps and uneven distribution of contact thermal resistance. During transducer operation, the low-temperature water flow in the water supply pipe continuously cools the base. Areas with low thermal resistance dissipate heat quickly, forming localized low-temperature points. When the temperature of these localized low-temperature points falls below the ambient dew point, condensation preferentially occurs, leading to condensation seeping into the transducer's electrical connections and causing short circuits or signal drift. Therefore... This invention characterizes the thermal resistance uniformity of the contact surface between the base and the subsequent connecting plate by measuring the temperature fluctuation range of the base during the natural cooling period after welding. When the temperature fluctuation range of the base is greater than the preset temperature fluctuation range, it indicates that the probability of local condensation during the operation of the transducer is higher. Therefore, the control unit increases the pre-tightening force of the fixing component and provides axial thrust to the fixing component through the electric push rod, increasing the contact pressure of the metal contact surface between the base and the connecting plate, flattening the micro-unevenness, reducing and homogenizing the contact thermal resistance, eliminating local low temperature points, thereby suppressing the conditions for condensation formation before the transducer is installed, and improving the installation efficiency and service life of the transducer. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the transducer pressurized installation non-stop water tapping device according to an embodiment of the present invention; Figure 2 This is a structural block diagram of a transducer pressurized installation non-stop water tapping device according to an embodiment of the present invention; Figure 3 This is a structural block diagram of the detection unit of the transducer pressurized installation non-stop water tapping device according to an embodiment of the present invention; Figure 4 This is a logic block diagram of the transducer pressurized non-water-stop opening device for determining the output power of the ceramic heating coil according to an embodiment of the present invention. Explanation of reference numerals in the attached drawings: 1-Water supply pipe, 2-Drill hole, 3-Base, 4-Ceramic heating ring, 5-Ball valve, 6-Sealing sleeve, 7-Vibration sensor, 8-Temperature sensor, 9-Drill rod, 10-Drive motor, 11-Drive rod, 12-Angular stroke electric actuator. Detailed Implementation

[0019] To make the objectives and advantages of the present invention clearer, the present invention will be further described below with reference to embodiments; it should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention.

[0020] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0021] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0022] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0023] Please see Figure 1 , Figure 2 as well as Figure 3 The figures shown are a schematic diagram, a block diagram, and a block diagram of the detection unit for a transducer installed under pressure without interrupting water flow, according to an embodiment of the present invention. The transducer installation device for a transducer installed under pressure without interrupting water flow according to an embodiment of the present invention includes: The base mounting unit is used to fix the transducer to the corresponding mounting position on the outer wall of the water supply pipe 1. It includes an arc generator for welding the base 3 of the transducer to the corresponding mounting position, a fixing component connected to the base for providing pre-tightening force to the transducer, and a ceramic heating ring 4 connected to the base to compensate for the heat dissipation difference caused by the corrosion of the inner wall of the water supply pipe by applying heat to the base. A pressurized drilling unit, which is connected to the base mounting unit, is used to drill holes in the water supply pipeline without interrupting the water supply. It includes a drive motor 10, a drill rod 9 fixedly connected to the drive rod 11 of the drive motor for drilling holes in the water supply pipeline, a ball valve 5 threadedly connected to the base for controlling the water flow interruption and flow rate, and a sealing sleeve 6 threadedly connected to the ball valve for achieving a seal. The detection unit is connected to the base mounting unit and the pressurized opening unit respectively, and is used to obtain the vibration frequency of the sealing sleeve during the process of drilling pipe passing through the ball valve and several temperatures of the base during the natural cooling period. The control unit, which is connected to the base mounting unit, the pressurized opening unit, and the detection unit respectively, is used to determine the output power of the ceramic heating ring based on the voltage drop of the arc generator during the monitoring period, determine the ball valve opening based on the vibration frequency of the sealing sleeve, and determine the preload of the fixing component based on the temperature fluctuation amplitude of the base.

[0024] Specifically, the water supply pipe at the corresponding installation location is made of carbon steel Q235B; the wall thickness of the water supply pipe is 8mm; and the diameter of the water supply pipe is DN300.

[0025] Specifically, the monitoring period is the time interval of 2.0 seconds from the start of welding the transducer base to the corresponding installation position.

[0026] Specifically, during the monitoring period, the welding current of the arc generator was 80A; the arc voltage was 16V; the shielding gas used during welding was argon, and the flow rate of the shielding gas was 10L / min.

[0027] Specifically, after the monitoring period ended, the base was actually welded. The welding current of the arc generator during the actual welding was 110A; the electrode type was E5015 and the electrode diameter was 3.2mm; the arc voltage of the arc generator during the actual welding was 25V and the welding speed was 150mm / min.

[0028] Specifically, after the pressurized drilling unit completes the drilling and the drill rod is removed, the transducer installation steps are performed. The transducer installation steps include: S1, closing the ball valve, removing the sealing sleeve, and ensuring the ball valve is threadedly connected to the base and in the closed state; S2, fixing the rear end of the transducer to the extension rod (not shown in the figure), then screwing the fixing disc from the fixing assembly onto the external thread of the extension rod, and simultaneously connecting the connecting disc from the fixing assembly to the external thread of the ball valve; S3, with the transducer's emitting surface facing forward, inserting the connecting disc, and opening the ball valve. Push the fixed plate along the transducer axis so that the transducer passes through the connecting plate, ball valve, and base in sequence until the emitting surface of the transducer extends into the interior of the water supply pipe and the emitting surface of the transducer contacts the water flow inside the water supply pipe; S4, after the transducer reaches the corresponding installation position, use bolts to fix the fixed plate and the connecting plate to form a fixed assembly, provide pre-tightening force to the transducer to prevent the transducer from being pushed out by the water pressure in the water supply pipe, and screw the rear seat of the transducer with wiring into the external thread of the fixed plate to complete the electrical connection and sealing of the transducer.

[0029] As will be understood by those skilled in the art, the operating principle and process of the transducer installation are conventional technical means well known to them, and therefore the operating principle and process of the transducer installation will not be described in detail here.

[0030] Specifically, the detection unit includes: Vibration sensor 7 is disposed on the outer wall of the sealing sleeve 6 to obtain the vibration frequency of the sealing sleeve; Temperature sensor 8, which is connected to the base 3, is used to obtain several temperatures of the base.

[0031] Please see Figure 4 As shown, it is a logic block diagram of the transducer pressure-on-demand uninterrupted water tapping device for determining the output power of the ceramic heating coil in an embodiment of the present invention. The control unit is used to determine that the impact of the corrosion of the inner wall of the water supply pipe at the corresponding installation position on the shrinkage uniformity of the weld pool during solidification does not meet the requirements based on the voltage drop of the arc generator during the monitoring period being greater than the preset drop amount, and to increase the output power of the ceramic heating coil.

[0032] Specifically, the voltage drop of the arc generator during the monitoring period is obtained through the voltage sensor built into the arc generator.

[0033] Specifically, if the voltage drop of the arc generator during the monitoring period is less than or equal to the preset drop, it is determined that the impact of the corrosion of the inner wall of the water supply pipe at the corresponding installation location on the shrinkage uniformity during the solidification of the weld pool meets the requirements.

[0034] Optionally, the material of the water supply pipe at the corresponding installation location is carbon steel Q235B; the wall thickness of the water supply pipe is 8mm; the diameter of the water supply pipe is DN300; and under the condition that the welding current is 80A, the preset drop range is [1.5V, 3.0V].

[0035] Preferably, the preferred embodiment with a preset descent amount is 2.5V.

[0036] Those skilled in the art will understand that the range of preset descent amounts and the preferred embodiments provided in this embodiment are the values ​​that best address the technical problem solved by the present invention, under the conditions that the water pipe at the corresponding installation position is made of carbon steel Q235B, the wall thickness of the water pipe is 8mm, the diameter of the water pipe is DN300, and the welding current is 80A. In actual applications or experiments, those skilled in the art can make adaptive adjustments to the preset descent amounts according to the actual application environment and application scenario.

[0037] In practice, when the voltage drop exceeds the preset drop value by less than 0.2V, the output power of the ceramic heating coil is adjusted to 1.1 times the current output power of the ceramic heating coil. When the voltage drop exceeds the preset drop value by more than 0.2V, the output power of the ceramic heating coil is increased by 10W for every 0.1V exceeding the preset drop value. In a specific embodiment, the current voltage drop is 2.9V, the current output power of the ceramic heating coil is 600W, and the increased output power of the ceramic heating coil when actually welding the base is 600W×1.1+(0.2V / 0.1V)×10W=680W.

[0038] Specifically, the output power of the ceramic heating coil is positively correlated with the voltage drop, wherein, The voltage drop is the difference between the voltage value of the arc generator at the beginning and the voltage value of the arc generator at the end of the monitoring period.

[0039] In practice, this invention addresses the technical problem of uneven shrinkage during weld pool solidification caused by corrosion of the inner wall of water pipelines. The uneven shrinkage during solidification is caused by the reduced wall thickness in the corroded areas of the water pipeline and the difference in thermal conductivity between iron oxide and the base material. This leads to decreased thermal resistance in the corroded areas, causing the water flow to carry away heat at a higher rate than in the uncorroded areas. Consequently, the cooling rate of the weld pool varies in different directions, resulting in anisotropic shrinkage of the weld metal and the formation of residual welding stress. By monitoring the voltage drop of the arc generator over a specified period, if the voltage drop exceeds a preset amount, it is determined that the corrosion does not meet the requirements for uniform shrinkage. The control unit then increases the output power of the ceramic heating coil to actively compensate for the excessively rapid heat dissipation in the corroded areas, slowing down their cooling rate and making the cooling in the circumferential direction of the base more uniform. This suppresses anisotropic shrinkage during weld pool solidification, reduces the generation of residual welding stress, improves the stability of the base, and ultimately improves the installation efficiency of the transducer.

[0040] Specifically, the control unit is connected to the vibration sensor and the ball valve respectively, and is used to determine that the impact of the micro-geometric warping of the base caused by the residual stress of the base welding on the stability of the drill rod rotation drilling process does not meet the requirements if the vibration frequency of the sealing sleeve during the drill rod passing through the ball valve is greater than the preset vibration frequency, and then reduce the opening of the ball valve.

[0041] Specifically, the process of the drill rod passing through the ball valve is as follows: the drill rod rotates and is axially fed under the drive of the drive motor. The front end of the drill rod starts from the inlet of the ball valve, passes through the valve core channel of the ball valve, and continues until the front end of the drill rod reaches the welding interface between the base and the outer wall of the water supply pipeline. In a specific embodiment, the duration of the process of the drill rod passing through the ball valve is 8.5 seconds.

[0042] Optionally, under the conditions of a drill rod rotation speed of 500 rpm, a drill rod diameter of 20 mm, a ball valve diameter of DN80, a water supply pipe material of carbon steel Q235B, and a water supply pipe wall thickness of 8 mm, the preset vibration frequency can be selected within the range of [80 Hz, 150 Hz].

[0043] Preferably, the preset vibration frequency in this embodiment is 120Hz.

[0044] Those skilled in the art will understand that the range of preset vibration frequencies and the preferred embodiments provided in this embodiment are the values ​​that best address the technical problem solved by the present invention, under the conditions that the drill rod rotation speed is 500 rpm, the drill rod diameter is 20 mm, the ball valve diameter is DN80, the water pipeline material is carbon steel Q235B, and the water pipeline wall thickness is 8 mm. In actual applications or experiments, those skilled in the art can make adaptive adjustments to the preset vibration frequencies according to the actual application environment and application scenario.

[0045] Specifically, the opening degree of the ball valve is adjusted by an angular stroke electric actuator 12 located at the top of the valve stem of the ball valve.

[0046] Specifically, the opening degree of the ball valve is negatively correlated with the vibration frequency.

[0047] In practice, when the vibration frequency of the sealing sleeve during the drill pipe passing through the ball valve is within 5 Hz greater than the preset vibration frequency, the ball valve opening is adjusted to 95% of the current ball valve opening. When the vibration frequency of the sealing sleeve during the drill pipe passing through the ball valve exceeds 5 Hz, the ball valve opening is reduced by 1° for every 1 Hz exceeding the preset vibration frequency. In a specific embodiment, the current vibration frequency of the sealing sleeve during the drill pipe passing through the ball valve is 128 Hz, the current ball valve opening is 90°, and the reduced ball valve opening is 90° × 95% - (3 Hz / 1 Hz) × 1° = 82.5°.

[0048] In implementation, this invention addresses the technical problem of microscopic geometric warping of the base caused by residual stress from base welding, which leads to mechanical collisions between the drill rod and the valve core of the ball valve. The mechanical collisions are caused by the micron-level geometric warping of the base flange surface, which causes eccentricity between the drill rod's rotation axis and the water pipeline axis. When the drill rod rotates at high speed through the ball valve, the eccentricity causes periodic mechanical collisions between the drill rod and the valve core, resulting in an increased vibration frequency of the sealing sleeve. These mechanical collisions exacerbate wear in the contact area between the drill rod and the ball valve core. In continuous operation under pressure, damage to the valve core can prevent complete valve sealing, posing a risk of seal failure during transducer installation. The hydrodynamic bearing effect is formed when the control unit reduces the ball valve opening, causing the drill valve... With the water flow channel cross-section at the inlet reduced, the water flow velocity through the valve inlet increases while the original water pressure in the water pipeline remains unchanged. When the high-speed fluid flows in the annular gap between the drill rod and the valve core, due to the fluid viscosity and the annular gap between the drill rod and the valve core, the flow cross-sectional area is large, the flow velocity is relatively low, and the pressure is high in the wide gap. When the fluid enters the narrow gap, the cross-sectional area decreases. According to the continuity equation, the flow velocity increases, which in turn generates a pressure distribution along the radial direction pointing towards the drill rod axis. This, in turn, generates a fluid restoring force pointing towards the axis of the water pipeline. The pressure causes the drill rod to return to the center of the axis. The fluid restoring force counteracts the mechanical eccentricity caused by welding stress, improving the stability of the drill rod rotating at high speed through the ball valve, thereby improving the safety of the transducer installation process.

[0049] Specifically, the control unit is connected to the temperature sensor and the fixing component respectively, and is used to determine that the effect of condensate accumulation during the operation of the transducer on the electrical connection stability of the transducer does not meet the requirements if the temperature fluctuation of the base after the end of the monitoring period is greater than the preset temperature fluctuation range, and to increase the preload of the fixing component.

[0050] Optionally, under the conditions that the base material is carbon steel Q235B, the base diameter is DN100, the base thickness is 15mm, the ambient temperature is 20℃, the relative humidity is 60%, and the natural cooling time is 45min, the preset temperature fluctuation range is [1.5℃, 5.0℃].

[0051] Preferably, the preset temperature fluctuation range is 3.0℃.

[0052] Those skilled in the art will understand that the selectable range of the preset temperature fluctuation range and the preferred embodiment provided in this embodiment are the values ​​that are most effective in solving the technical problem of the present invention under the conditions that the base material is carbon steel Q235B, the diameter of the base is DN100, the thickness of the base is 15mm, the ambient temperature is 20℃, the relative humidity is 60%, and the natural cooling time is 45min. In actual applications or experiments, those skilled in the art can make adaptive adjustments to the preset temperature fluctuation range according to the actual application environment and application scenario.

[0053] Specifically, the fixing assembly includes a fixing plate, a connecting plate, and an electric push rod for providing axial thrust to the fixing assembly to adjust the preload. The fixed disk and the connecting disk are movably connected along the transducer axis, and the electric push rod adjusts the preload by driving the fixed disk to move axially.

[0054] Specifically, the preload force is positively correlated with the temperature fluctuation amplitude.

[0055] In practice, when the temperature fluctuation is greater than the preset temperature fluctuation range by less than 0.5℃, the preload of the fixing component is adjusted to 1.1 times the current preload. When the temperature fluctuation exceeds the preset temperature fluctuation range by more than 0.5℃, the preload of the fixing component is increased by 0.5kN for every 0.1℃ increase. In a specific embodiment, the current temperature fluctuation range is 3.7℃, the current preload of the fixing component is 30kN, and the increased preload is 30kN×1.1+(0.2℃ / 0.1℃)×0.5kN=34kN.

[0056] Specifically, the temperature fluctuation range of the base is the difference between the maximum temperature and the minimum temperature of the base during the natural cooling period.

[0057] Specifically, after the base is welded, it is allowed to cool naturally for 45 minutes, that is, the natural cooling period is 45 minutes.

[0058] In implementation, this invention addresses the technical problem of uneven base temperature caused by residual stress, which in turn leads to the risk of localized condensation buildup during transducer operation. The cause of this localized condensation buildup is the microscopic warping of the base due to residual stress, preventing tight contact between the base and the connecting plate, creating tiny gaps and resulting in uneven distribution of contact thermal resistance. During transducer operation, the low-temperature water flow in the water supply pipe continuously cools the base. Areas with low thermal resistance dissipate heat quickly, forming localized low-temperature points. When the temperature of these localized low-temperature points falls below the ambient dew point, condensation preferentially occurs, leading to condensation seeping into the transducer's electrical connections and causing short circuits or signal drift. Therefore... This invention characterizes the thermal resistance uniformity of the contact surface between the base and the subsequent connecting plate by measuring the temperature fluctuation range of the base during the natural cooling period after welding. When the temperature fluctuation range of the base is greater than the preset temperature fluctuation range, it indicates that the probability of local condensation during the operation of the transducer is higher. Therefore, the control unit increases the pre-tightening force of the fixing component and provides axial thrust to the fixing component through the electric push rod, increasing the contact pressure of the metal contact surface between the base and the connecting plate, flattening the micro-unevenness, reducing and homogenizing the contact thermal resistance, eliminating local low temperature points, thereby suppressing the conditions for condensation formation before the transducer is installed, and improving the installation efficiency and service life of the transducer.

[0059] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A transducer pressurized installation non-stop water tapping device, characterized in that, include: The base mounting unit is used to fix the transducer to the corresponding mounting position on the outer wall of the water supply pipe. It includes an arc generator for welding the base of the transducer to the corresponding mounting position, a fixing component connected to the base for providing pre-tightening force to the transducer, and a ceramic heating coil connected to the base to compensate for the heat dissipation difference caused by corrosion of the inner wall of the water supply pipe by applying heat to the base. A pressurized drilling unit, which is connected to the base mounting unit, is used to drill holes in the water supply pipeline without interrupting the water supply. It includes a drive motor, a drill rod fixedly connected to the drive rod of the drive motor for drilling holes in the water supply pipeline, a ball valve threadedly connected to the base for controlling the water flow interruption and flow rate, and a sealing sleeve threadedly connected to the ball valve for achieving a seal. The detection unit is connected to the base mounting unit and the pressurized opening unit respectively, and is used to obtain the vibration frequency of the sealing sleeve during the process of drilling pipe passing through the ball valve and several temperatures of the base during the natural cooling period. The control unit, which is connected to the base mounting unit, the pressurized opening unit, and the detection unit respectively, is used to determine the output power of the ceramic heating ring based on the voltage drop of the arc generator during the monitoring period, determine the ball valve opening based on the vibration frequency of the sealing sleeve, and determine the preload of the fixing component based on the temperature fluctuation amplitude of the base.

2. The transducer pressurized installation non-stop water tapping device according to claim 1, characterized in that, The detection unit includes: A vibration sensor is disposed on the outer wall of the sealing sleeve to obtain the vibration frequency of the sealing sleeve; A temperature sensor, connected to the base, is used to obtain several temperatures of the base.

3. The transducer pressurized installation non-stop water tapping device according to claim 2, characterized in that, The control unit is used to determine that the corrosion of the inner wall of the water pipe at the corresponding installation location does not meet the requirements for the effect of shrinkage uniformity during the solidification of the weld pool if the voltage drop of the arc generator during the monitoring period is greater than a preset drop amount, and then increases the output power of the ceramic heating ring.

4. The transducer pressurized installation non-stop water tapping device according to claim 3, characterized in that, The output power of the ceramic heating coil is positively correlated with the voltage drop, wherein... The voltage drop is the difference between the voltage value of the arc generator at the beginning and the voltage value of the arc generator at the end of the monitoring period.

5. The transducer pressurized installation non-stop water tapping device according to claim 4, characterized in that, The control unit is connected to the vibration sensor and the ball valve respectively. It is used to determine that the impact of the micro-geometric warping of the base caused by the residual stress of the base welding on the stability of the drill rod rotation drilling process does not meet the requirements if the vibration frequency of the sealing sleeve during the drill rod passing through the ball valve is greater than the preset vibration frequency, and then reduce the opening of the ball valve.

6. The transducer pressurized installation non-stop water tapping device according to claim 5, characterized in that, The opening degree of the ball valve is negatively correlated with the vibration frequency of the sealing sleeve.

7. The transducer pressurized installation non-stop water tapping device according to claim 6, characterized in that, The control unit is connected to the temperature sensor and the fixing component respectively. It is used to determine that the effect of condensate accumulation during the operation of the transducer on the electrical connection stability of the transducer does not meet the requirements if the temperature fluctuation of the base after the end of the monitoring period is greater than the preset temperature fluctuation range, and to increase the preload of the fixing component.

8. The transducer pressurized installation non-stop water tapping device according to claim 7, characterized in that, The fixing assembly includes a fixing plate, a connecting plate, and an electric push rod for providing axial thrust to the fixing assembly to adjust the preload. The fixed disk and the connecting disk are movably connected along the transducer axis, and the electric push rod adjusts the preload by driving the fixed disk to move axially.

9. The transducer pressurized installation non-stop water tapping device according to claim 8, characterized in that, The preload force is positively correlated with the temperature fluctuation range.

10. The transducer pressurized installation non-stop water tapping device according to claim 9, characterized in that, The temperature fluctuation range of the base is the difference between the maximum temperature and the minimum temperature of the base during the natural cooling period.

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