Pressure sensor for underwater pressure detection

Abstract

The utility model belongs to the field of pressure sensors, and particularly relates to a pressure sensor for underwater pressure detection, which comprises a frame, the bottom surface of the frame is fixedly connected with insertion rods distributed in a rectangular array, and the top surface of the frame is fixedly connected with a lifting assembly and a cleaning assembly. The lifting assembly comprises sliding grooves symmetrically and fixedly connected to the top face of the frame, sliding blocks are slidably connected into the sliding grooves, a lifting table is fixedly connected to the side faces of the sliding blocks, and a threaded hole is formed in the surface of one sliding block. A screw rod of the lifting assembly is matched with a driving motor to replace a traditional rope lifting structure, and the driving motor accurately controls the rotating angle of the screw rod to drive a sliding block to vertically move in a sliding groove, so that the function of millimeter-level precision adjustment of vertical displacement is achieved; the problem of depth control deviation caused by elastic deformation or sliding of the rope is solved, and the accuracy of depth adjustment of the pressure sensor is improved.

Description

Technical Field

[0001] This utility model relates to the field of pressure sensors, specifically a pressure sensor for underwater pressure detection. Background Technology

[0002] To improve the monitoring of rivers and lakes, water conservancy monitoring personnel will install pressure sensing equipment in the monitored water. The pressure sensors are used to measure water depth and to understand the changes in river water level through changes in water pressure. The surface material of the pressure sensors is made of corrosion-resistant material to prevent the pressure sensor surface from being corroded by the river water.

[0003] In the prior art, such as in publication number CN222460913U, a pressure sensor for underwater pressure detection is disclosed. It includes a mounting bracket and a pressure sensing assembly. A crossbar is fixedly connected to the bottom of the pressure sensing assembly, and a frame is fixedly connected to both ends of the crossbar. Two through holes are formed on the movable ring, and the bottom end of the vertical rod movably passes through adjacent through holes. In this utility model, a pressure sensor for underwater pressure detection, during use, causes a float to move up and down with the water flow. When the float moves upward, a second rope pulls the movable ring upward; when the float moves downward, the movable ring moves downward under gravity. The up-and-down movement of the movable ring drives a brush to clean the deposits attached to the sensing end. This device does not require additional power consumption, effectively reducing the operating cost of the pressure sensor. Furthermore, this device effectively avoids the problem of pressure sensor malfunction and monitoring interference caused by sludge and impurities, effectively improving the practicality of the device itself.

[0004] While the aforementioned patent achieves both depth adjustment and surface cleaning through ropes and floats, the simple use of ropes to raise and lower the pressure sensor makes it impossible to precisely control the sensor's depth, affecting the accuracy of the detection structure. Furthermore, urban waterways do not experience significant waves, limiting the vertical displacement of the floats and making it insufficient for cleaning the pressure sensor's surface. Therefore, this paper proposes a pressure sensor for underwater pressure detection to address these issues. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, the use of simple ropes to raise and lower the pressure sensor cannot accurately control the depth of the pressure sensor, affecting the accuracy of the detection structure. At the same time, the surface of urban waterways does not have large waves, and the vertical displacement distance of the float is very limited, which cannot complete the cleaning operation on the surface of the pressure sensor. This utility model proposes a pressure sensor for underwater pressure detection.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a pressure sensor for underwater pressure detection, comprising a frame, wherein the bottom surface of the frame is fixedly connected with a row of rods arranged in a rectangular array, and the top surface of the frame is fixedly connected with a lifting assembly and a cleaning assembly.

[0007] The lifting assembly includes symmetrically fixedly connected sliding grooves to the top surface of the frame. A slider is slidably connected inside the sliding groove. A lifting platform is fixedly connected to the side of the slider. A threaded hole is opened on the surface of one of the sliders. A lead screw is threadedly connected inside the threaded hole. One end of the lead screw is fixedly connected to the output end of the drive motor. An equipment box is sleeved on the surface of the drive motor. The equipment box is fixedly connected to the top surface of one of the sliding grooves.

[0008] The cleaning assembly includes a pressure sensor fixedly connected to the top surface of the lifting platform. A bearing is fixedly connected to the top surface of the pressure sensor. A bracket is sleeved inside the bearing. A rotating ring is fixedly connected to the bottom end of the bracket. A scrubbing layer is fixedly connected to the inner side wall of the rotating ring. A connecting rod is fixedly connected to the top surface of the bracket. A spiral blade is fixedly connected to the top end of the connecting rod. The spiral blade is driven to rotate by water flow and drives the scrubbing layer to rotate and adhere to the surface of the pressure sensor to clean the dirt through the connecting rod.

[0009] Preferably, the slide groove consists of two linear guides arranged symmetrically on an axis, the slider and the slide groove are connected by a sliding fit, and the threaded hole is located at the center of one of the sliders and matches the thread structure of the lead screw.

[0010] Preferably, the device box completely encloses the drive motor and its bottom surface is fixedly connected to the top surface of the corresponding slide groove by bolts.

[0011] Preferably, the outer ring of the bearing is welded and fixed to the top surface of the pressure sensor, and the bracket is interference-fitted to the inner ring of the bearing.

[0012] Preferably, the spiral blade is three arc-shaped blades, and the bending direction of the arc-shaped blades is perpendicular to the water flow direction to maximize the water flow driving torque.

[0013] Preferably, the scrubbing layer is a flexible nylon scrubbing layer, and the pressure sensor is fixedly connected to the lifting platform by a rigid metal plate.

[0014] The advantages of this utility model are:

[0015] 1. This utility model replaces the traditional rope lifting structure by using the lead screw of the lifting component in conjunction with the drive motor. The drive motor precisely controls the rotation angle of the lead screw, which drives the slider to move vertically in the groove. This structure design achieves millimeter-level precision adjustment of vertical displacement, solves the problem of depth control deviation caused by elastic deformation or slippage of the rope, and improves the accuracy of depth adjustment of the pressure sensor.

[0016] 2. This utility model features a structural design that uses water flow impact to drive the spiral blade to rotate, and the connecting rod transmits torque to cause the bracket to rotate continuously around the axis of the pressure sensor. This design enables the inner side of the rotating ring to cover the sensor surface with a brushing layer in a circular motion, solving the problem of insufficient vertical displacement and limited cleaning range of the floating plate due to the weak waves in urban waterways, and improving the cleaning effect on the surface of the pressure sensor. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the lifting component structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the cleaning component structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the disassembled structure of this utility model.

[0022] In the diagram: 1. Frame; 2. Insert rod; 3. Lifting assembly; 31. Slide rail; 32. Slider; 33. Lifting platform; 34. Lead screw; 35. Drive motor; 36. Equipment box; 4. Cleaning assembly; 41. Pressure sensor; 42. Bearing; 43. Bracket; 44. Rotary ring; 45. Scrubber layer; 46. Connecting rod; 47. Spiral blade. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0024] Please see Figures 1-4 As shown, a pressure sensor for underwater pressure detection includes a frame 1. A rectangular array of rods 2 are fixedly connected to the bottom surface of the frame 1. A lifting assembly 3 and a cleaning assembly 4 are fixedly connected to the top surface of the frame 1. The lifting assembly 3 includes symmetrically fixed grooves 31 fixedly connected to the top surface of the frame 1. A slider 32 is slidably connected inside the groove 31. A lifting platform 33 is fixedly connected to the side of the slider 32. A threaded hole is opened on the surface of one of the sliders 32, and a lead screw 34 is threadedly connected inside the threaded hole. One end of the lead screw 34 is fixedly connected to the output end of a drive motor 35. A device box 36 is sleeved on the surface of the drive motor 35, and the device box 36 is fixedly connected to the top surface of one of the grooves 31.

[0025] During operation, the lifting assembly 3 uses a 57BYG stepper motor as the drive motor 35. Its output end is fixedly connected to a trapezoidal threaded screw 34 via a coupling. The screw 34 engages with the threaded hole at the center of the slider 32. When the drive motor 35 drives the screw 34 to rotate, the slider 32 moves vertically along the linear guide rail in the slide groove 31, driving the lifting platform 33 and the pressure sensor 41 (Honeywell 24PC) fixed on its top surface to achieve millimeter-level depth adjustment. The equipment box 36 seals and encloses the drive motor 35 and is fixed to the top surface of the slide groove 31 to prevent water from seeping into the motor. Thus, the rigid transmission replaces the flexible lifting of the rope in the comparison document, eliminating the depth error caused by elastic deformation.

[0026] Furthermore, the cleaning component 4 includes a pressure sensor 41 fixedly connected to the top surface of the lifting platform 33. A bearing 42 is fixedly connected to the top surface of the pressure sensor 41. A bracket 43 is sleeved inside the bearing 42. A rotating ring 44 is fixedly connected to the bottom end of the bracket 43. A scrubbing layer 45 is fixedly connected to the inner side wall of the rotating ring 44. A connecting rod 46 is fixedly connected to the top surface of the bracket 43. A spiral blade 47 is fixedly connected to the top end of the connecting rod 46. The spiral blade 47 is driven to rotate by water flow and drives the scrubbing layer 45 to rotate and adhere to the surface of the pressure sensor 41 to clean dirt through the connecting rod 46.

[0027] During operation, the spiral blade 47 of the cleaning component 4 consists of three arc-shaped nylon blades with its axis collinear with the connecting rod 46. When the water flow impacts the spiral blade 47, it generates a rotational torque, which drives the bracket 43 to rotate around the axis of the bearing 42 via the connecting rod 46. The rotating ring 44 at the bottom of the bracket 43 drives the inner flexible nylon scrubbing layer 45 to rotate in contact with the surface of the pressure sensor 41 (model Honeywell 24PC). The scrubbing layer 45 covers the entire detection area of ​​the sensor in a circular motion, thoroughly removing algae and sludge attached to the surface. The pressure sensor 41 is fixed to the lifting platform 33 by a rigid metal plate to ensure detection stability during the scrubbing process. This allows for linear cleaning of the floating plate in low-flow-rate environments, replacing the float plate of the comparison document, and achieving efficient and thorough self-cleaning.

[0028] Furthermore, the outer ring of the bearing 42 is welded and fixed to the top surface of the pressure sensor 41, and the bracket 43 is interference-fitted with the inner ring of the bearing 42.

[0029] During operation, the outer ring of the bearing 42 is fixed to the top surface of the pressure sensor 41 by welding. The bracket 43 and the inner ring of the bearing 42 are connected by an interference fit, so that the bracket 43 and the bearing 42 form a rigid rotating pair. The welding process ensures that there is no relative displacement between the bearing 42 and the pressure sensor 41. The interference fit eliminates the axial clearance when the bracket 43 rotates. Thus, when the spiral blade 47 is driven by water flow, the bracket 43 drives the rotating ring 44 and the brushing layer 45 to rotate stably around the axis of the pressure sensor 41, avoiding the brushing layer 45 from shifting due to vibration or friction, and improving the continuity and reliability of the cleaning action.

[0030] Furthermore, the spiral blade 47 consists of three arc-shaped blades, with the curvature of the arc-shaped blades perpendicular to the direction of water flow to maximize the water flow driving torque.

[0031] During operation, the three arc-shaped blades of the spiral blade 47 bend in a direction perpendicular to the water flow direction. When the water flow impacts the blades, the arc-shaped structure converts the kinetic energy of the water flow into rotational torque and transmits it to the bracket 43 through the connecting rod 46. The blade bending angle optimizes the water flow ingress direction, enabling the spiral blade 47 to generate sufficient driving force even in low flow conditions, driving the scrubbing layer 45 to rotate continuously. This overcomes the defect of insufficient torque in weak water flow of traditional straight blades and ensures efficient removal of dirt from the surface of the pressure sensor 41.

[0032] Furthermore, the scrubbing layer 45 is a flexible nylon scrubbing layer, and the pressure sensor 41 is fixedly connected to the lifting platform 33 by a rigid metal plate.

[0033] During operation, the brushing layer 45, made of flexible nylon, is tightly attached to the surface of the pressure sensor 41. The pressure sensor 41 is fixedly connected to the lifting platform 33 by a rigid metal plate. When rotating, the flexible brushing layer 45 adapts to the concave and convex contours of the pressure sensor 41 surface, avoiding hard friction damage to the sensor housing. At the same time, the rigid metal plate suppresses vibration interference transmitted from the lifting platform 33 to the pressure sensor 41, ensuring the stability of the detection data during the cleaning process and achieving synchronous optimization of cleaning and detection functions.

[0034] Working principle: The frame 1 is fixed to the underwater monitoring point by the rods 2 of the rectangular array on the bottom surface. After the drive motor 35 is started, the lead screw 34 rotates to drive the slider 32 to rise and fall vertically in the slide groove 31, thereby driving the lifting platform 33 and the pressure sensor 41 to be precisely adjusted to the target detection depth. When the water flows through the spiral blade 47, its arc-shaped blades generate rotational torque due to the impact of the fluid. This torque is transmitted to the bracket 43 through the connecting rod 46, causing the bracket 43 to rotate around the axis of the bearing 42 and drive the rotating ring 44 to rotate. The brushing layer 45 on the inner side of the rotating ring 44 rubs against the surface of the pressure sensor 41 to clean the deposits. The outer ring of the bearing 42 is welded and fixed to the top surface of the pressure sensor 41, and the inner ring is interference-fitted with the bracket 43 to eliminate rotational clearance. The arc-shaped blades of the spiral blade 47 optimize the torque output at low flow rates. The flexible nylon brushing layer 45 adapts to the surface contour of the sensor. Combined with the rigid connection between the pressure sensor 41 and the lifting platform 33, vibration interference is suppressed, realizing the coordinated operation of precise depth control and self-cleaning function, and completely solving the technical defects of insufficient lifting accuracy and limited cleaning range of traditional methods.

[0035] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, or similar improvements made within the theoretical and principle content of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure sensor for underwater pressure detection, characterized in that: Includes a frame (1), the bottom surface of which is fixedly connected to a row of rods (2) arranged in a rectangular array, and the top surface of which is fixedly connected to a lifting assembly (3) and a cleaning assembly (4). The lifting assembly (3) includes a sliding groove (31) symmetrically fixedly connected to the top surface of the frame (1). A slider (32) is slidably connected inside the sliding groove (31). A lifting platform (33) is fixedly connected to the side of the slider (32). A threaded hole is opened on the surface of one of the sliders (32). A lead screw (34) is threaded inside the threaded hole. One end of the lead screw (34) is fixedly connected to the output end of the drive motor (35). A device box (36) is sleeved on the surface of the drive motor (35). The device box (36) is fixedly connected to the top surface of one of the sliding grooves (31). The cleaning assembly (4) includes a pressure sensor (41) fixedly connected to the top surface of the lifting platform (33). A bearing (42) is fixedly connected to the top surface of the pressure sensor (41). A bracket (43) is sleeved inside the bearing (42). A rotating ring (44) is fixedly connected to the bottom end of the bracket (43). A scrubbing layer (45) is fixedly connected to the inner side wall of the rotating ring (44). A connecting rod (46) is fixedly connected to the top surface of the bracket (43). A spiral blade (47) is fixedly connected to the top end of the connecting rod (46). The spiral blade (47) is driven to rotate by water flow and drives the scrubbing layer (45) to rotate and adhere to the surface of the pressure sensor (41) to clean dirt through the connecting rod (46).

2. A pressure sensor for underwater pressure detection according to claim 1, characterized in that: The groove (31) consists of two linear guides arranged symmetrically on an axis. The slider (32) is connected to the groove (31) by a sliding fit. The threaded hole is located at the center of one of the sliders (32) and matches the thread structure of the lead screw (34).

3. A pressure sensor for underwater pressure detection according to claim 1, characterized in that: The device box (36) completely encloses the drive motor (35), and its bottom surface is fixedly connected to the top surface of the corresponding slide (31) by bolts.

4. A pressure sensor for underwater pressure detection according to claim 1, characterized in that: The outer ring of the bearing (42) is welded and fixed to the top surface of the pressure sensor (41), and the bracket (43) is interference-fitted with the inner ring of the bearing (42).

5. A pressure sensor for underwater pressure detection according to claim 1, characterized in that: The spiral blade (47) consists of three arc-shaped blades, the curvature of which is perpendicular to the direction of water flow to maximize the water flow driving torque.

6. A pressure sensor for underwater pressure detection according to claim 1, characterized in that: The scrubbing layer (45) is a flexible nylon scrubbing layer, and the pressure sensor (41) is fixedly connected to the lifting platform (33) by a rigid metal plate.

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