Pore water pressure hole electronic probe protection device

Abstract

The utility model relates to the technical field of sensor protection, in particular to a protection device for an electronic probe of a pore water pressure hole. The problem that an electronic probe is damaged due to the fact that existing solid particles easily impact the electronic probe is solved. Comprising a protection shell, the protection shell is installed on the electronic probe, first through holes distributed at equal intervals in the circumferential direction are formed in the protection shell, a cover plate is arranged on the protection shell, a plurality of fixing plates distributed at equal intervals in the circumferential direction are fixedly connected to the inner side face of the protection shell, and a plurality of second through holes are formed in the fixing plates. According to the utility model, a double interception mechanism of the protective shell and the fixed plate is introduced, so that direct impact and abrasion of solid particles to core parts of the sensor are effectively reduced, the equipment maintenance and replacement frequency is greatly reduced, and the overall service life of the sensor is remarkably prolonged.

Description

Technical Field

[0001] This utility model relates to the field of sensor protection technology, and in particular to a protection device for an electronic probe of pore water pressure hole. Background Technology

[0002] Pore ​​water pressure is a crucial parameter in geotechnical engineering for assessing effective soil stress, analyzing seepage fields, predicting geological hazards, and ensuring engineering safety. It is widely used in various engineering fields such as slope stability analysis, foundation pit support design, and dam safety monitoring. Electronic probes, due to their high measurement accuracy, fast response speed, and ease of automated data acquisition, have become the core equipment for in-situ monitoring in modern geotechnical engineering.

[0003] However, during long-term use in complex geological environments, the sensor components of the probe are often subjected to various external factors. Especially in highly permeable strata, sandy strata, or areas affected by construction disturbances, groundwater often carries sand and gravel particles at high speeds, frequently impacting the probe surface and causing continuous wear on the sensing elements, severely reducing measurement accuracy and even leading to equipment failure. Furthermore, soil deformation, borehole collapse, and construction disturbances can also apply uneven pressure to the probe, causing structural deformation or damage, further reducing the stability and lifespan of the equipment. Utility Model Content

[0004] To overcome the problems mentioned above, this utility model provides a protection device for an electronic probe of pore water pressure holes.

[0005] The technical solution of this utility model is as follows: a protective device for a pore water pressure hole electronic probe, including a protective shell, the protective shell being installed on the electronic probe, the protective shell having first through holes distributed circumferentially at equal intervals, the protective shell being provided with a cover plate, and a plurality of fixing plates distributed circumferentially at equal intervals being fixedly connected to the inner side of the protective shell, the fixing plates having a plurality of second through holes.

[0006] More preferably, the first through hole and the second through hole are distributed in a circumferential manner.

[0007] More preferably, all the fixing plates are fixedly connected to a fixing frame, and the central axis of the fixing frame coincides with the central axis of the protective shell.

[0008] More preferably, the fixing frame is fixedly connected to a fixing frame that is circumferentially equidistant, and the fixing frame has a plurality of third through holes.

[0009] More preferably, the diameters of the first through hole, the second through hole, and the third through hole decrease sequentially.

[0010] More preferably, it also includes a rotating frame, which is rotatably disposed within the fixed frame. The rotating frame has an inclined surface, and multiple counterweights are fixedly connected to the side of the rotating frame away from the inclined surface.

[0011] More preferably, a thin film is fixed between the counterweight and the rotating frame, and the rotating frame has multiple sets of fourth through holes. The number of sets of fourth through holes is the same as the number of counterweights, and the multiple sets of fourth through holes and multiple counterweights are alternately distributed.

[0012] More preferably, it also includes a sliding plate, which is slidably disposed on the cover plate, and a spring is fixedly connected between the sliding plate and the cover plate. The cover plate is slidably connected to the protective shell, and the protective shell is fixedly connected with circumferentially distributed limiting members. The cover plate is provided with protrusions that limit and cooperate with the limiting members.

[0013] Beneficial effects: This utility model, by introducing a dual interception mechanism of protective shell and fixing plate, not only effectively reduces the direct impact and wear of solid particles on the core components of the sensor, greatly reducing the frequency of equipment maintenance and replacement, thus significantly extending the overall service life of the sensor; by setting up a support structure of fixing frame and multiple fixing plates, the external extrusion pressure on the protective shell in complex geological environments is effectively dispersed, enhancing the structural strength of the overall device, and effectively preventing extrusion damage to the internal electronic probe caused by deformation of the protective shell; it significantly improves the response speed and measurement sensitivity of the electronic probe to changes in pore water pressure; and the detachable design of the cover plate facilitates the cleaning of impurities inside the protective shell by operators, reducing the technical threshold and time cost of on-site maintenance, making it suitable for long-term monitoring tasks in various complex geological environments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a cross-sectional view of the protective shell and cover plate of this utility model;

[0016] Figure 3 This is a three-dimensional structural diagram of the fixing plate and fixing frame of this utility model;

[0017] Figure 4 This is an exploded view of the protective shell and mounting bracket of this utility model;

[0018] Figure 5 This is a cross-sectional view of the fixing bracket and fixing frame of this utility model.

[0019] Wherein: 1-electronic probe, 2-protective shell, 201-first through hole, 3-cover plate, 4-fixed plate, 401-second through hole, 5-fixed frame, 6-fixed frame, 601-third through hole, 7-rotating frame, 8-counterweight, 9-film, 10-fourth through hole, 11-sliding plate, 12-spring, 13-limiting component. Detailed Implementation

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention.

[0021] Example 1: A protection device for an electronic probe of pore water pressure holes, referring to... Figures 1-3 As shown, the device includes a protective shell 2, which is mounted on the electronic probe 1 and located outside the electronic probe 1. The protective shell 2 has eight sets of first through holes 201 circumferentially distributed at equal intervals (this number is the quantity shown in the attached figure, and the actual number can be adjusted accordingly based on the actual situation). Each set contains five first through holes 201 circumferentially distributed at equal intervals. A cover plate 3 is provided at the lower part of the protective shell 2. Eight fixing plates 4 are fixed to the inner side of the protective shell 2, which are circumferentially distributed at equal intervals. The fixing plates 4 are V-shaped and have multiple second through holes 401. The first through holes 201 and the second through holes 401 are circumferentially distributed in a cross pattern to buffer and guide the liquid passing through the first through holes 201, thereby reducing the impact force on the electronic probe 1. The upper part of the electronic probe 1 and the protective shell 2 forms an annular chamber, and the eight fixing plates 4 and the protective shell 2 form eight filter chambers. The annular chamber is only connected to the eight filter chambers.

[0022] Reference Figures 2-4 As shown, eight fixing plates 4 are jointly fixed to a fixing frame 5. The central axis of the fixing frame 5 coincides with the central axis of the protective shell 2. The fixing frame 5 and the eight fixing plates 4 form eight chambers. The fixing frame 5 is fixed to eight circumferentially equidistant fixing frames 6. The eight fixing frames 6 are located in the eight chambers respectively. The fixing frames 6 have multiple third through holes 601. The position of the third through holes 601 is in the middle of the adjacent chambers, so that when solid particles are trapped in the corresponding chambers, the obstruction of the third through holes 601 by solid particles is reduced. The diameter of the first through hole 201, the diameter of the second through hole 401 and the diameter of the third through hole 601 decrease in sequence.

[0023] Working principle: When using the electronic probe 1 for measurement, the protective shell 2 is first threaded onto the electronic probe 1, and then the electronic probe 1 is buried in the designated area. Moisture in the soil enters the corresponding chamber through the first through hole 201 and the second through hole 401. Subsequently, the moisture fills the middle of the fixing frame 5 through the third through hole 601. The electronic probe 1 then detects the water pressure in the middle of the fixing frame 5. During this process, the multiple interceptions of the first through hole 201, the second through hole 401 and the third through hole 601 reduce the damage of solid particles to the electronic probe 1, thereby improving the protection effect of the electronic probe 1.

[0024] Example 2: Based on Example 1, referring to... Figures 3-5 As shown, it also includes a rotating frame 7, which is rotatably mounted inside the fixed frame 5. The rotating frame 7 has an inclined surface, and five grooves are evenly distributed on the inclined surface side of the rotating frame 7. The grooves are used to guide the flow of liquid. Three counterweights 8 are fixedly connected to the side of the rotating frame 7 away from the inclined surface. A membrane 9 is fixedly connected between the counterweights 8 and the rotating frame 7. The rotating frame 7 has three sets of fourth through holes 10. The number of fourth through holes 10 in each set is four that are evenly distributed, and the three sets of fourth through holes 10 and the three counterweights 8 are alternately distributed.

[0025] Working principle: When the electronic probe 1 is horizontally buried in the soil for measurement, the amount of water seeping out of the pores is small in the initial stage of measurement. At this time, the water in the soil enters the fixed frame 5 through the first through hole 201, the second through hole 401 and the third through hole 601. At this time, under the gravity of the counterweight 8, the rotating frame 7 rotates to the point where its upper inclined surface faces upward. The water that has entered the fixed frame 5 will drip onto the inclined surface of the rotating frame 7. Subsequently, under the guidance of the trench, the water in the soil accumulates between the rotating frame 7 and the electronic probe 1, which facilitates the electronic probe 1 to quickly measure the water pressure in the pores. Subsequently, the water in the pores gradually precipitates out and fills the fixed frame 5.

[0026] Example 3: Based on Example 2, referring to... Figures 2-4 As shown, it also includes a sliding plate 11, which is slidably disposed on the cover plate 3. The protective shell 2, the fixing plate 4, and the fixing frame 5 are all in contact with the upper surface of the sliding plate 11. A spring 12 is fixedly connected between the sliding plate 11 and the cover plate 3. The cover plate 3 is slidably connected to the protective shell 2. The protective shell 2 is fixedly provided with four circumferentially equidistant limiting members 13. The cover plate 3 is provided with a protrusion that limits and cooperates with the limiting members 13. When the cover plate 3 is installed on the protective shell 2, the spring 12 is in a compressed state.

[0027] Working principle: During use, the cover plate 3 is installed on the protective shell 2. The operation described in the above embodiment is repeated to measure the pore water pressure. When a single measurement is completed or the equipment needs maintenance, the operator first pushes the cover plate 3 so that the protrusion on the cover plate 3 is separated from the contact with the limiting member 13. Then, the cover plate is rotated 45° and removed. After that, the impurities in the chamber, the impurities between the fixing plate 4 and the protective shell 2 are cleaned to facilitate the high-precision measurement of the pore water pressure of the remaining parts of the equipment.

[0028] Those skilled in the art should understand that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the protection scope of the present invention.

Claims

1. A protection device for an electronic probe of pore water pressure holes, characterized in that, Includes a protective shell (2), which is mounted on an electronic probe (1). The protective shell (2) has first through holes (201) distributed circumferentially at equal intervals. The protective shell (2) is provided with a cover plate (3). Multiple fixing plates (4) distributed circumferentially at equal intervals are fixed to the inner side of the protective shell (2). Multiple second through holes (401) are provided on the fixing plates (4).

2. The pore water pressure orifice electronic probe protection device according to claim 1, characterized in that, The first through hole (201) and the second through hole (401) are intersected in the circumferential direction.

3. The pore water pressure orifice electronic probe protection device according to claim 1, characterized in that, All the fixing plates (4) are fixedly connected to a fixing frame (5), and the central axis of the fixing frame (5) coincides with the central axis of the protective shell (2).

4. The pore water pressure orifice electronic probe protection device according to claim 3, characterized in that, The fixing frame (5) is fixedly connected to a fixing frame (6) that is circumferentially equidistantly distributed, and the fixing frame (6) has a plurality of third through holes (601).

5. The pore water pressure orifice electronic probe protection device according to claim 4, characterized in that, The diameters of the first through hole (201), the second through hole (401), and the third through hole (601) decrease sequentially.

6. The pore water pressure orifice electronic probe protection device according to claim 4, characterized in that, It also includes a rotating frame (7), which is rotatably disposed within the fixed frame (5). The rotating frame (7) is provided with an inclined surface, and multiple counterweights (8) are fixedly connected to the side of the rotating frame (7) away from the inclined surface.

7. The pore water pressure orifice electronic probe protection device according to claim 6, characterized in that, A thin film (9) is fixed between the counterweight (8) and the rotating frame (7). The rotating frame (7) has multiple sets of fourth through holes (10). The number of sets of fourth through holes (10) is the same as the number of counterweights (8), and the multiple sets of fourth through holes (10) are alternately distributed with the multiple counterweights (8).

8. The pore water pressure orifice electronic probe protection device according to claim 7, characterized in that, It also includes a sliding plate (11), which is slidably disposed on the cover plate (3), and a spring (12) is fixed between the sliding plate (11) and the cover plate (3). The cover plate (3) is slidably connected to the protective shell (2). The protective shell (2) is fixedly provided with circumferentially distributed limiting members (13), and the cover plate (3) is provided with a protrusion that limits and cooperates with the limiting members (13).

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