Differential pressure level gauge with adjustable position fixing device

Abstract

This utility model discloses a differential pressure level gauge with an adjustable position fixing device, belonging to the technical field of level gauges. The level gauge includes a housing, on which a fixing component and a connecting component are provided. The fixing component is retractable relative to the housing, and the connecting component is movable relative to the housing. The retraction of the fixing component is controlled by the movement of the connecting component. When the connecting component moves inward into the housing, the fixing component gradually extends until it extends outside the housing and engages with the pipe wall outside the level gauge. When the connecting component moves outward from the housing, the fixing component gradually retracts until it retracts into the housing, allowing the level gauge to move within the pipe wall. This utility model solves the problem of the level gauge's fixed position after installation by controlling the retraction of the fixing component through the movement of the connecting component. Furthermore, users do not need to disassemble the entire instrument; they can easily adjust the level gauge's depth in the pipeline simply by operating the connecting component, greatly improving the convenience of installation, maintenance, and calibration.

Description

Technical Field

[0001] This utility model belongs to the field of level gauge technology, and in particular relates to a differential pressure level gauge with an adjustable position fixing device. Background Technology

[0002] Level gauges, as monitoring devices, are widely used in various engineering structures such as foundations, bridges, and tunnels. In actual operation, one device is usually deployed at a reference point and another at the measured point, and they are placed at fixed points. When the measured point moves up or down relative to the reference point, pressure changes occur at each point. The device can calculate the rise and fall of each measured point relative to the horizontal baseline using the pressure value of the internal liquid. Today, with the continuous enrichment of application scenarios and the increasing complexity and variability of working environments, the monitoring needs are gradually increasing, and the industry is placing increasingly stringent requirements on such monitoring equipment in terms of measurement range, measurement accuracy, equipment size, environmental adaptability, and protection level.

[0003] Currently, there are various ways to fix the level gauge probe, such as flange connection, threaded connection or installation using independent fixing brackets. Although these fixing methods are reliable, they generally have a significant drawback: once the installation is completed, the position of the probe in the pipeline is fixed and difficult to adjust flexibly.

[0004] Furthermore, for some level gauges that need to be inserted into the pipe before being fixed, the existing technology lacks a fixing mechanism that can temporarily retract during installation and then easily and securely open after being in place. This may cause the level gauge to encounter obstacles during the insertion of the pipe, or the fixing mechanism itself may be complicated to operate and have low reliability during installation.

[0005] Therefore, there is an urgent need to design a differential pressure level gauge with an adjustable position fixing device to solve the problems mentioned above. Utility Model Content

[0006] The purpose of this invention is to provide a differential pressure level gauge with an adjustable position fixing device, which has the advantage of facilitating the adjustment of the level gauge position and solves the problems mentioned in the background art.

[0007] To achieve the above objectives, the specific technical solution of this utility model for a differential pressure level gauge with an adjustable position fixing device is as follows: A differential pressure level gauge with an adjustable position fixing device includes a housing, on which a fixing component and a connecting component are provided. The fixing component can extend and retract relative to the housing, and the connecting component can move relative to the housing. The extension and retraction of the fixing component is controlled by the movement of the connecting component. When the connecting component moves into the housing, the fixing component gradually extends until it extends outside the housing and engages with the pipe wall outside the level gauge. When the connecting component moves out of the housing, the fixing component gradually retracts until it retracts into the housing, allowing the level gauge to move inside the pipe wall.

[0008] Furthermore, the fixing component includes a support frame, and a locking block is provided inside the support frame. The locking block can rotate relative to the support frame. When the locking block rotates relative to the support frame, the locking end of the locking block can extend outside the housing or retract inside the housing.

[0009] Furthermore, a rotating rod is fixedly connected to the card block, and the rotating rod is rotatably connected to the support frame, so that the card block can rotate relative to the support frame with the rotating rod as the axis.

[0010] Furthermore, a first spring is connected inside the support frame. The end of the first spring away from the support frame is connected to the end of the locking block away from the locking end. When the connecting assembly moves into the housing, the elastic force of the first spring is gradually released, and the locking end of the locking block gradually rotates and extends outward from the housing. When the connecting assembly moves outward from the housing, the first spring is compressed and stores force, and the locking end of the locking block gradually rotates and retracts inward from the housing.

[0011] Furthermore, the support frame is provided with a sliding rod, which can slide relative to the support frame. One end of the sliding rod abuts against the end of the locking block away from the locking end, and the end of the sliding rod away from the locking block abuts against the connecting assembly. When the connecting assembly moves into the housing, the elastic force of the first spring is gradually released, the sliding rod slides in the first direction, and the locking end of the locking block gradually rotates and extends outward from the housing. When the connecting assembly moves outward from the housing, the sliding rod slides in the second direction, the first spring is compressed and stores force, and the locking end of the locking block gradually rotates and retracts inward from the housing.

[0012] Furthermore, a protective sleeve is fitted onto the snap-fit ​​end of the card block.

[0013] Furthermore, the connecting assembly includes a connecting rod that can slide relative to the housing. One end of the connecting rod is fixedly connected to a hook, and the end of the connecting rod away from the hook is connected to a stop bar. The stop bar abuts against the sliding rod to control the sliding direction of the sliding rod.

[0014] Furthermore, the abutment includes a first straight section, a variable diameter section, and a second straight section. The first straight section is fixedly connected to the second straight section through the variable diameter section. The end of the first straight section away from the variable diameter section is connected to the connecting rod. When the sliding rod abuts against the first straight section, the locking block extends outside the housing and engages with the pipe wall outside the level gauge. When the sliding rod abuts against the second straight section, the locking block fixing assembly retracts into the housing. When the sliding rod abuts against the variable diameter section, the locking end of the locking block gradually retracts or gradually extends.

[0015] Furthermore, a stop is connected between the connecting rod and the abutment rod, and a second spring is fixedly connected to the stop. The end of the second spring away from the stop is fixedly connected to the outer shell support.

[0016] Furthermore, a spline is fixedly connected to the connecting rod, and a keyway adapted to the spline is provided on the outer shell support. When the locking end of the locking block extends to the outside of the outer shell and locks with the pipe wall outside the level gauge, the spline is located in the keyway. When the locking end of the locking block retracts into the outer shell, the spline and the keyway separate. The spline and the keyway can be misaligned by rotating the connecting rod, thereby keeping the locking end of the locking block retracted into the outer shell.

[0017] This utility model has the following advantages: by controlling the extension and retraction of the fixed component through the movement of the connecting component, the pain point of "once installed, the position is fixed" in the background technology is fundamentally solved. Moreover, users do not need to disassemble the entire instrument. They can easily adjust the depth of the level gauge in the pipeline by simply operating the connecting component, which greatly improves the convenience of installation, maintenance and calibration. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the level gauge of this utility model; Figure 2 This is a schematic diagram of the structure of the outer shell support part of this utility model; Figure 3 This is a schematic diagram of the structure of the connecting component and the fixing component of this utility model; Figure 4 This is a schematic diagram of the structure of the connecting component of this utility model; Figure 5 This is a schematic diagram of the structure of the fixing component of this utility model; The markings in the diagram are as follows: 1. Outer shell; 11. Base plate; 2. Fixing component; 21. Support frame; 22. Locking block; 23. Protective sleeve; 24. Rotating rod; 25. First spring; 26. Sliding rod; 3. Connecting component; 31. Connecting rod; 32. Hook; 33. Support rod; 331. First straight section; 332. Variable diameter section; 333. Second straight section; 34. Stop block; 35. Spline; 36. Second spring; 4. Air pipe interface; 5. Liquid pipe interface; 6. POWERBUS communication interface. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] Those skilled in the art will understand that although some embodiments herein include certain features included in other embodiments but not others, combinations of features from different embodiments are intended to be within the scope of this invention and form different embodiments. For example, in the claims, any of the claimed embodiments can be used in any combination.

[0021] The following is a reference to the appendix. Figure 1 To be continued Figure 5 This invention describes a differential pressure level gauge with an adjustable position fixing device.

[0022] The level gauge includes a circuit board and a housing 1. The circuit board includes a reference power supply module, a temperature sensor module, a pressure sensor transmitter module, an MCU module, and a POWERBUS communication module.

[0023] The reference power supply module mainly consists of a precision reference chip TL431 and three high-precision capacitors. It converts 5V voltage into 2.5V voltage, sends the reference voltage to the AD input terminal of the MCU, realizes reference voltage sampling, and achieves high-precision isolation. The temperature sensor module mainly consists of an NTC temperature sensor and a sampling resistor. The sensor is precisely calibrated to eliminate zero-point error and linearity error, and converts the temperature value into a continuous voltage value, which is then sent to the AD input terminal of the MCU, thus realizing the accurate conversion of the physical quantity of temperature into an electrical signal. The pressure sensor transmitter module is mainly composed of the MLX90834 chip, which integrates functions in an SO16 package. It has built-in sensor signal processing circuit, digital hardware, voltage regulator and digital output driver chip, and has an advanced voltage protection mechanism. It can convert the pressure value into voltage and send it to the AD input terminal of the MCU to realize pressure sampling conversion. The MCU module is mainly composed of the STC15F2K60S2 microcontroller, which has a high-precision R / C clock inside and an 8-channel 10-bit high-speed ADC to realize functions such as reference voltage input, temperature reading, pressure reading, POWERBUS communication, and communication indication. The POWERBUS communication module mainly consists of a dedicated communication chip PB332 and capacitors and resistors, and is primarily used to realize the communication function between the MCU and other terminal devices.

[0024] The circuit board also integrates a POWERBUS communication interface 6, which is used to connect with the data acquisition device to read liquid level and temperature values, and to set parameters.

[0025] A reference power supply circuit is also integrated on the circuit board to generate a high-precision, high-stability voltage. Its output voltage serves as a reference voltage for other circuits, increasing the stability of the acquisition equipment and extending its service life.

[0026] In addition, a program burning interface is integrated on the circuit board and brought out through the POWERBUS communication module. Program upgrades can be performed via POWERBUS communication without opening the outer casing 1.

[0027] The circuit board also integrates POWERBUS signal output interfaces and power supply interfaces on both the left and right sides, and wiring can be done on both sides.

[0028] The outer casing 1 includes a liquid storage chamber, an air pipe interface 4, a liquid pipe interface 5, and a POWERBUS communication interface 6. The air pipe interface 4, the liquid pipe interface 5, and the POWERBUS communication interface 6 are all connected to the support of the outer casing 1.

[0029] The outer casing 1 is provided with a base plate 11. When the internal circuit board malfunctions, the circuit board can be removed and replaced by disassembling the base plate 11.

[0030] Liquid pipe interfaces 5 are provided on both sides of the liquid storage chamber. The liquid pipe interfaces 5 on the left and right sides are connected to other level gauges to ensure the flow of liquid in the liquid storage chamber.

[0031] On both sides of the circuit board storage location, there are air pipe interfaces 4 and POWERBUS communication interfaces 6. The air pipe interfaces 4 on the left and right sides are connected to other level gauges to allow gas flow; the POWERBUS communication interfaces 6 on the left and right sides are connected to other level gauges or data acquisition terminals with the same wiring sequence to enable circuit connection between level gauges and data reading from data acquisition terminals.

[0032] Currently, there are various ways to fix the level gauge probe, such as flange connection, threaded connection or installation using independent fixing brackets. Although these fixing methods are reliable, they generally have a significant drawback: once the installation is completed, the position of the probe in the pipeline is fixed and difficult to adjust flexibly.

[0033] Therefore, the outer casing 1 is provided with a fixing component 2 and a connecting component 3. The fixing component 2 can extend and retract relative to the outer casing 1, and the connecting component 3 can move relative to the outer casing 1. The extension and retraction of the fixing component 2 is controlled by the movement of the connecting component 3. When the connecting component 3 moves into the outer casing 1, the fixing component 2 gradually extends until it extends to the outside of the outer casing 1 and engages with the pipe wall outside the level gauge. When the connecting component 3 moves out of the outer casing 1, the fixing component 2 gradually retracts until it retracts into the outer casing 1, so that the level gauge can move inside the pipe wall.

[0034] By controlling the extension and retraction of the fixed component 2 through the movement of the connecting component 3, the pain point of "fixed position once installed" in the background technology is fundamentally solved. Moreover, users do not need to disassemble the entire instrument; they can easily adjust the depth of the level gauge in the pipeline simply by operating the connecting component 3, which greatly improves the convenience of installation, maintenance, and calibration.

[0035] Preferably, there are two sets of fixing components 2 and two sets of connecting components 3, which are located at both ends of the outer shell 1, to ensure that the fixing components 2 have sufficient friction when in contact with the pipe wall, thereby avoiding slippage. In other embodiments of this utility model, the fixing components 2 and connecting components 3 can also be a set, with one set of fixing components 2 and connecting components 3 located at one end of the outer shell 1.

[0036] Preferably, the three fixing components 2 are grouped together to ensure that the friction of the fixing components 2 is sufficient when in contact with the pipe wall, thereby avoiding slippage. In other embodiments of this utility model, the number of fixing components 2 may also be other.

[0037] The fixing component 2 includes a support frame 21, and a locking block 22 is provided inside the support frame 21. The locking block 22 can rotate relative to the support frame 21. When the locking block 22 rotates relative to the support frame 21, the locking end of the locking block 22 can extend to the outside of the outer shell 1 or retract into the outer shell 1. The extension and retraction of the locking block 22 is achieved by rotation rather than sliding, which can make full use of the limited radial space and make the structure of the entire fixing component 2 more compact, making it suitable for working in narrow spaces such as pipes.

[0038] Preferably, a rotating rod 24 is fixedly connected to the locking block 22, and the rotating rod 24 is rotatably connected to the support frame 21, so that the locking block 22 can rotate relative to the support frame 21 with the rotating rod 24 as the axis. In other embodiments of this utility model, other rotation methods may also be used.

[0039] Furthermore, a first spring 25 is connected inside the support frame 21. The end of the first spring 25 away from the support frame 21 is connected to the end of the locking block 22 away from the locking end. When the connecting assembly 3 moves into the outer shell 1, the elastic force of the first spring 25 is gradually released, and the locking end of the locking block 22 gradually rotates and extends outward from the outer shell 1. When the connecting assembly 3 moves outward from the outer shell 1, the first spring 25 is compressed and stores force, and the locking end of the locking block 22 gradually rotates and retracts inward from the outer shell 1. The elastic force of the first spring 25 provides a continuous and stable automatic driving force for the extension of the locking block 22. When the connecting assembly 3 is operated to the locking position, the spring force will automatically ensure that the locking block 22 is always pressed tightly against the pipe wall. Even if the pipe wall is slightly uneven or undergoes slight deformation due to vibration, it can automatically compensate and prevent loosening. At the same time, when there is no human intervention, the spring force ensures that it is in the locking state.

[0040] The support frame 21 is provided with a sliding rod 26, which can slide relative to the support frame 21. One end of the sliding rod 26 abuts against the end of the locking block 22 away from the locking end, and the end of the sliding rod 26 away from the locking block 22 abuts against the connecting component 3. When the connecting component 3 moves into the outer shell 1, the elastic force of the first spring 25 is gradually released, the sliding rod 26 slides in the first direction A, and the locking end of the locking block 22 gradually rotates and extends outward from the outer shell 1. When the connecting component 3 moves outward from the outer shell 1, the sliding rod 26 slides in the second direction B, the first spring 25 is compressed and stores force, and the locking end of the locking block 22 gradually rotates and retracts inward from the outer shell 1. The movement of the connecting component 3 is converted into the rotation of the locking block 22 by the sliding of the sliding rod 26, thus realizing a smooth conversion of the movement mode.

[0041] The first direction A is the direction in which the sliding rod 26 moves away from the tail of the locking block 22, and the second direction B is the direction in which the sliding rod 26 moves closer to the tail of the locking block 22.

[0042] Specifically, the support frame 21 has a sliding groove, and the sliding rod 26 is slidably connected to the sliding groove.

[0043] Furthermore, a protective sleeve 23 is fitted onto the snap-fit ​​end of the snap-fit ​​block 22. Preferably, the protective sleeve 23 is made of polyester fiber to increase friction while protecting the equipment and pipe wall.

[0044] The connecting component 3 includes a connecting rod 31, which can slide relative to the outer shell 1. A hook 32 is fixedly connected to one end of the connecting rod 31, and a stop rod 33 is connected to the end of the connecting rod 31 away from the hook 32. The stop rod 33 abuts against the sliding rod 26 to control the sliding direction of the sliding rod 26. The hook 32 facilitates manual or tool operation.

[0045] The stop rod 33 includes a first straight section 331, a variable diameter section 332, and a second straight section 333. The first straight section 331 is fixedly connected to the second straight section 333 through the variable diameter section 332. The end of the first straight section 331 away from the variable diameter section 332 is connected to the connecting rod 31. When the sliding rod 26 abuts against the first straight section 331, the locking block 22 extends to the outside of the housing 1 and engages with the pipe wall outside the level gauge, corresponding to a fully locked state. When the sliding rod 26 abuts against the second straight section 333, the locking block 22 fixing component 2 retracts into the housing 1, corresponding to a fully retracted state. When the sliding rod 26 abuts against the variable diameter section 332, the engaging end of the locking block 22 gradually retracts or gradually extends. The variable diameter section 332 makes the extension and retraction of the locking block 22 a gradual process, rather than an instantaneous pop-out or snap-back. Specifically, the diameter of the first straight section 331 is smaller than the diameter of the second straight section 333.

[0046] A stop 34 is connected between the connecting rod 31 and the abutment rod 33. A second spring 36 is fixedly connected to the stop 34. The end of the second spring 36 away from the stop 34 is fixedly connected to the support part of the outer shell 1. The second spring 36 can automatically reset the connecting component 3. When the connecting component 3 has moved out of the outer shell 1 and the connecting component 3 is released, the elastic force of the second spring 36 is released, which helps the connecting component 3 to reset.

[0047] A spline 35 is fixedly connected to the connecting rod 31. A keyway adapted to the spline 35 is provided on the support part of the outer shell 1. When the locking end of the locking block 22 extends to the outside of the outer shell 1 and locks with the pipe wall outside the level gauge, the spline 35 is located in the keyway. When the locking end of the locking block 22 retracts into the outer shell 1, the spline 35 separates from the keyway. The spline 35 and the keyway can be misaligned by rotating the connecting rod 31, thereby keeping the locking end of the locking block 22 retracted into the outer shell 1.

[0048] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A differential pressure level gauge with an adjustable position fixing device, characterized in that, The device includes a housing, on which a fixing component and a connecting component are provided. The fixing component can extend and retract relative to the housing, and the connecting component can move relative to the housing. The extension and retraction of the fixing component is controlled by the movement of the connecting component. When the connecting component moves into the housing, the fixing component gradually extends until it extends outside the housing and engages with the pipe wall outside the level gauge. When the connecting component moves out of the housing, the fixing component gradually retracts until it retracts into the housing, allowing the level gauge to move inside the pipe wall.

2. The differential pressure level gauge with adjustable position fixing device according to claim 1, characterized in that, The fixing component includes a support frame with a locking block inside. The locking block can rotate relative to the support frame. When the locking block rotates relative to the support frame, the locking end of the locking block can extend outside the housing or retract inside the housing.

3. The differential pressure level gauge with adjustable position fixing device according to claim 2, characterized in that, A rotating rod is fixedly connected to the locking block, and the rotating rod is rotatably connected to the support frame, so that the locking block can rotate relative to the support frame with the rotating rod as the axis.

4. The differential pressure level gauge with an adjustable position fixing device according to claim 2, characterized in that, A first spring is connected inside the support frame. The end of the first spring away from the support frame is connected to the end of the locking block away from the locking end. When the connecting assembly moves into the housing, the elastic force of the first spring is gradually released, and the locking end of the locking block gradually rotates and extends outward from the housing. When the connecting assembly moves outward from the housing, the first spring is compressed and stores force, and the locking end of the locking block gradually rotates and retracts inward from the housing.

5. The differential pressure level gauge with an adjustable position fixing device according to claim 4, characterized in that, The support frame is equipped with a sliding rod that can slide relative to the support frame. One end of the sliding rod abuts against the end of the locking block away from the locking end, and the end of the sliding rod away from the locking block abuts against the connecting assembly. When the connecting assembly moves into the housing, the elastic force of the first spring is gradually released, the sliding rod slides in the first direction, and the locking end of the locking block gradually rotates and extends outward from the housing. When the connecting assembly moves outward from the housing, the sliding rod slides in the second direction, the first spring is compressed and stores force, and the locking end of the locking block gradually rotates and retracts inward from the housing.

6. The differential pressure level gauge with adjustable position fixing device according to claim 2, characterized in that, A protective sleeve is fitted onto the snap-fit ​​end of the card block.

7. The differential pressure level gauge with adjustable position fixing device according to claim 5, characterized in that, The connecting assembly includes a connecting rod that can slide relative to the housing. One end of the connecting rod is fixedly connected to a hook, and the end of the connecting rod away from the hook is connected to a stop bar. The stop bar abuts against the sliding rod to control the sliding direction of the sliding rod.

8. The differential pressure level gauge with adjustable position fixing device according to claim 7, characterized in that, The stop rod includes a first straight section, a variable diameter section, and a second straight section. The first straight section is fixedly connected to the second straight section through the variable diameter section. The end of the first straight section away from the variable diameter section is connected to the connecting rod. When the sliding rod abuts against the first straight section, the locking block extends outside the housing and engages with the pipe wall outside the level gauge. When the sliding rod abuts against the second straight section, the locking block fixing assembly retracts into the housing. When the sliding rod abuts against the variable diameter section, the locking end of the locking block gradually retracts or gradually extends.

9. The differential pressure level gauge with adjustable position fixing device according to claim 7, characterized in that, A stop is connected between the connecting rod and the abutment rod. A second spring is fixedly connected to the stop. The end of the second spring away from the stop is fixedly connected to the outer shell support.

10. The differential pressure level gauge with an adjustable position fixing device according to claim 9, characterized in that, A spline is fixedly connected to the connecting rod, and a keyway adapted to the spline is provided on the outer shell support. When the locking end of the locking block extends to the outside of the outer shell and locks with the pipe wall outside the level gauge, the spline is located in the keyway. When the locking end of the locking block retracts into the outer shell, the spline and the keyway separate. The spline and the keyway can be misaligned by rotating the connecting rod, thereby keeping the locking end of the locking block retracted into the outer shell.

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