CN219474657U - Sensor protector and sensing device comprising same - Google Patents
Sensor protector and sensing device comprising same Download PDFInfo
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- CN219474657U CN219474657U CN202223141242.1U CN202223141242U CN219474657U CN 219474657 U CN219474657 U CN 219474657U CN 202223141242 U CN202223141242 U CN 202223141242U CN 219474657 U CN219474657 U CN 219474657U
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Abstract
The utility model provides a sensor protection device and a sensing device comprising the same, wherein the sensor protection device comprises a protection shell, a guide assembly, a float block and an opening and closing structure arranged between the protection shell and the float block; the protective shell is of a hollow structure with an opening at the bottom, and the guide component is fixedly arranged on the protective shell and extends to the position below the opening at the bottom of the protective shell; the float block is arranged below the protective shell and moves up and down along the guide component; when the float block is not submerged, the float block is positioned at the lowest part of the guide assembly, and the space where the sensing element is positioned is in an open state; when the bottom opening of the protective shell is submerged, the float block is positioned at the highest position of the guide assembly, and the protective shell is connected with the float block through the opening and closing structure so as to block the space where the sensing element is positioned, thereby avoiding on-site liquid from entering the protective cylinder to achieve the purpose of protecting the sensing element.
Description
Technical Field
The utility model relates to the technical field of sensors, in particular to a sensor protection device and a sensing device comprising the sensor protection device.
Background
The sensor is a detection device, can sense the measured information, and can convert the sensed information into an electric signal or other information output in a required form according to a certain rule so as to meet the requirements of information transmission, processing, storage, display, recording, control and the like; if the measured information is to be sensed, the detection cavity of the sensor needs to be communicated with the outside. However, some sensors have a relatively harsh working environment, and when the rainfall is too large, the installation site is at risk of being submerged by water or other liquid, so that protection measures are usually taken on the sensors to avoid damage to the sensors caused by being submerged.
Currently, there are two common protective measures:
(1) Installing a sensor cover to prevent water vapor and the like in the gas to be measured from entering
Document CN208833718U discloses a gas sensor detection device, the sensor protection structure includes a sensor cover covered on the periphery of the sensor, a gas diffusion opening for gas to enter and exit the sensor cover is provided on the sensor cover, a filtering structure is provided at the gas diffusion opening, so that dust, water vapor and the like can be reduced or prevented from entering the sensor through the gas diffusion opening;
in addition, document CN201007705Y discloses an optical gas sensor protection cover, in which a filtering device is arranged in the housing, and dust and humid gas cannot enter the sensor even if the optical gas sensor protection cover works in a high-humidity and high-dust environment;
however, when the installation site is submerged by water or other liquid, the two structures cannot avoid the water or other liquid from entering the detection space of the sensor;
(2) By positive pressure
The sensor is arranged at the top end of the waterproof cylinder, and when the sensor is submerged, the liquid level in the waterproof cylinder is prevented from rising to the top by air pressure;
however, when the submerged depth is large, the pressure generated by the positive pressure mode is possibly higher than the ambient pressure required by the normal operation of the sensor, and the damage of the sensor cannot be completely avoided;
(3) By means of combination of electronic detection and electric mechanism
Detecting whether the liquid level needs to submerge the sensor cavity or not through the liquid level sensor, if so, starting the electric actuator to close the sensor cavity, otherwise, starting the electric actuator to open the cavity;
however, in this way, when the liquid level sensor or the electric actuator fails, the sensor chamber is not closed/opened timely, and thus the whole system is abnormal in operation.
In order to solve the above problems, an ideal technical solution is always sought.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art, and provides a sensor protection device and a sensing device comprising the sensor protection device.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
the first aspect of the utility model provides a sensor protection device for preventing on-site liquid from entering a space where a sensing element is located, which comprises a protection shell, a guide assembly, a float block and an opening and closing structure arranged between the protection shell and the float block;
the protective shell is of a hollow structure with an opening at the bottom, and the guide assembly is fixedly arranged on the protective shell and extends to the position below the opening at the bottom of the protective shell;
the float block is arranged below the protective shell and moves up and down along the guide assembly;
when the float block is not submerged, the float block is positioned at the lowest part of the guide assembly, and a space where the sensing element is positioned is in an open state;
when the bottom opening of the protective shell is submerged, the float block is positioned at the highest position of the guide assembly, and the protective shell is connected with the float block through the opening and closing structure so as to block the space where the sensing element is positioned.
A second aspect of the utility model provides a sensing device comprising a sensing element and a sensor guard as described above.
The beneficial effects of the utility model are as follows:
1) The utility model provides a sensor protection device and a sensing device comprising the same, which comprises a protection shell, a guide assembly, a float block and an opening and closing structure arranged between the protection shell and the float block, wherein under the condition of no external force, the space where a sensing element is positioned is blocked by utilizing the buoyancy of liquid through the float block, and after the liquid level descends, the sensing element can be unlocked under the action of the gravity of the float block, so that the float block descends, and the sensing element space is opened; therefore, the sensor protection device can realize the detection function and simultaneously can avoid external liquid from entering so as to achieve the purpose of protecting the sensing element;
2) When the space where the sensing element is positioned is blocked/opened, the utility model does not depend on an electric actuating mechanism, so that the sensor protection device has stable performance, low fault and long service life;
3) The utility model has mature technology, simple structure and realization mode and is suitable for large-scale popularization.
Drawings
FIG. 1 is a schematic view of a sensor guard according to a first embodiment;
FIG. 2 is a schematic diagram II of a sensor guard according to a first embodiment;
FIG. 3 is a schematic diagram III of a sensor guard of the first embodiment;
FIG. 4 is a schematic view of a sensor guard of a second embodiment;
FIG. 5 is a schematic diagram II of a sensor guard according to a second embodiment;
FIG. 6 is a schematic view of a third embodiment of a sensor guard;
FIG. 7 is a schematic diagram II of a sensor guard according to a third embodiment;
FIG. 8 is a schematic view of a fourth embodiment of a sensor guard;
FIG. 9 is a schematic diagram II of a sensor guard of a fourth embodiment;
FIG. 10 is a schematic view of a sensor guard of a fifth embodiment;
FIG. 11 is a schematic diagram II of a sensor guard according to a fifth embodiment;
FIG. 12 is a schematic view of a sensor guard of a sixth embodiment;
FIG. 13 is a second schematic structural view of a sensor guard according to a sixth embodiment;
in the figure: 1. a sensing element; 2. a protective housing; 3. a guide assembly; 4. an opening and closing structure; 5. a float block; 6. and a stop block.
Detailed Description
The technical scheme of the utility model is further described in detail through the following specific embodiments.
Example 1
A sensor protection device for preventing on-site liquid from entering a space where a sensing element is located, comprising a protection shell 2, a guide assembly 3, a float block 5 and an opening and closing structure 4 arranged between the protection shell 2 and the float block 5; the protective shell 2 is of a hollow structure with an opening at the bottom, and the guide component 3 is fixedly arranged on the protective shell 2 and extends to the position below the opening at the bottom of the protective shell 2; the float block 5 is arranged below the protective shell 2 and moves up and down along the guide assembly 3;
when the float block 5 is not submerged, the float block 5 is positioned at the lowest part of the guide assembly 3, and the space where the sensing element is positioned is in an open state;
when the bottom opening of the protective housing 2 is submerged, the float block 5 is positioned at the highest position of the guide assembly 3, and the protective housing 2 is connected with the float block 5 through the opening and closing structure 4 so as to block the space where the sensing element is positioned.
It should be noted that, the protective housing 2 provides a detection space for the sensing element 1 and provides a certain protection effect for the sensing element 1; the guide component 3 ensures that the float block 5 moves according to a preset track, the float block 5 can move along the guide component 3 under the action of the floating force of liquid, and the sensing element space is closed/opened; the opening and closing structure 4 can lock the float block 5, so that the condition that the outside liquid enters a space where the sensing element is located due to the fact that the float block 5 slides back and forth after the liquid level rises (submerges the float block 5) is avoided, and when the liquid level drops, the float block 5 can be unlocked under the action of self gravity of the float block 5, the float block 5 drops, and the space where the sensing element is located is opened;
therefore, the sensor protection device can seal/open the space where the sensing element is located through the floating block under the condition of no external force, and can prevent external liquid from entering while realizing the detection function, thereby achieving the purpose of protecting the sensing element.
Specifically, the protective housing 2 is a cylinder, a square cylinder, a triangular cylinder, a trapezoid cylinder and other multi-corner shapes, and the shape of the opening and closing structure 4 is adapted to the shape of the protective housing 2.
Further, the guide assembly 3 comprises a connecting rod, a guide post and a stop block 6, two ends of the connecting rod are fixedly arranged on the inner wall of the protective shell 2, one end of the guide post is vertically connected with the connecting rod, the other end of the guide post is connected with the stop block 6, and the stop block 6 is positioned below the protective shell 2;
it can be understood that after the connecting rod is mounted on the inner wall of the protective housing 2, the sensing element space above the connecting rod is communicated with the sensing element space below the connecting rod, so that the sensing element space is in an open state, and the normal operation of the sensing element is not affected.
In a first specific embodiment, as shown in fig. 1 to 3, the float block 5 is in a triangular pyramid structure, the bottom diameter of the triangular pyramid structure is larger than the inner diameter of the protective housing 2, and the top diameter of the triangular pyramid structure is smaller than the inner diameter of the protective housing; the opening and closing structure 4 comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded in the lower part of the triangular pyramid structure, and the other annular magnet is arranged on the inner wall of the protective shell 2;
as shown in fig. 2, after the liquid level drops, the float block 5 can be unlocked under the action of its own gravity, so that the float block 5 drops to the lowest part of the guide post, at this time, the internal space of the protective housing 2 is communicated with the outside, and the space where the sensing element is located is in an open state;
as shown in fig. 3, when the liquid level rises, the float block 5 is pushed to move upwards along the guide post by using the buoyancy of the liquid without the help of an external force, and because the opening and closing structure 4 is two annular magnets with opposite polarities, when the two annular magnets approach, the protective shell 2 is connected with the float block 5 by virtue of the magnetic force, so that the space where the sensing element is located is blocked.
In a second embodiment, as shown in fig. 4 to 5, the float block 5 is a first groove structure, the guide post is disposed through the bottom of the first groove structure, and the size of the bottom of the first groove structure is larger than that of the protective housing 2;
the opening and closing structure 4 comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded in the side wall of the groove of the first groove structure, and the other annular magnet is arranged at the lower part of the protective shell 2 and penetrates through the protective shell 2;
as shown in fig. 4, after the liquid level drops, the first groove structure can be unlocked under the action of its own gravity, so that the first groove structure drops to the lowest part of the guide post, at this time, the internal space of the protective housing 2 is communicated with the outside, and the space where the sensing element is located is in an open state;
as shown in fig. 5, when the liquid level rises, the first groove structure is pushed to move upwards along the guide post by using the buoyancy of the liquid without using an external force, and because the opening and closing structure 4 is two annular magnets with opposite polarities, when the two annular magnets approach, the lower part of the protective shell 2 is buckled in the groove of the first groove structure by using the magnetic force, so that the space where the sensing element is located is blocked.
In a third embodiment, as shown in fig. 6 to 7, the float block 5 has a first convex structure, and the size of the convex part of the first convex structure is smaller than the inner diameter of the protective housing 2;
the opening and closing structure 4 comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded on the convex part of the first convex structure, and the other annular magnet is arranged on the inner wall of the protective shell 2; when the float block 5 is positioned at the lowest part of the guide assembly 3, the convex part of the first convex structure is positioned below the protective shell 2;
as shown in fig. 6, after the liquid level drops, the first convex structure can be unlocked under the action of its own gravity, so that the first convex structure drops to the lowest part of the guide post, at this time, the internal space of the protective housing 2 is communicated with the outside, and the space where the sensing element is located is in an open state;
as shown in fig. 7, when the liquid level rises, the first convex structure is pushed to move upwards along the guide post by using the buoyancy of the liquid without using an external force, and as the opening and closing structure 4 is two annular magnets with opposite polarities, when the two annular magnets approach, the convex part of the first convex structure is buckled at the lower part of the protective shell 2 by using the magnetic force, so that the space where the sensing element is located is blocked.
In a fourth embodiment, as shown in fig. 8 to 9, the float block 5 has a second convex structure, and a gap is provided between a convex portion of the second convex structure and an inner wall of the protective housing 2;
the opening and closing structure 4 comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded on the convex part of the second convex structure, and the other annular magnet is arranged on the inner wall of the protective shell 2;
when the float block 5 is positioned at the lowest part of the guide assembly 3, the convex part of the convex structure is positioned in the protective shell 2;
as shown in fig. 8, after the liquid level drops, the second convex structure can be unlocked under the action of its own gravity, so that the second convex structure drops to the lowest part of the guide post, and at this time, although the convex part of the convex structure is located in the protective housing 2, since a gap is provided between the convex part of the second convex structure and the inner wall of the protective housing 2, the inner space of the protective housing 2 is still communicated with the outside, so that the sensing element space is in an open state;
as shown in fig. 9, when the liquid level rises, the second convex structure is pushed to move upwards along the guide post by the buoyancy of the liquid without using an external force, and as the opening and closing structure 4 is two annular magnets with opposite polarities, when the two annular magnets approach, the convex part of the second convex structure is connected with the annular magnets in the protective shell 2 by the action of magnetic force, so that the space where the sensing element is located is blocked.
Specifically, the shape adaptation of the float block 5 with the protective housing 2 lower part, the weight of float block 5 is according to the magnetic force size of switching structure 4 sets up, after the liquid level descends, ensures that float block 5 can follow under self gravity effect the guide post descends.
Further, a rubber sealing ring is further provided on the float block 5 and/or the protective housing 2, and after the two ring magnets with opposite polarities of the opening and closing structure 4 are attracted, the rubber sealing ring deforms so as to strengthen the protective function.
Example 2
It should be noted that, the guiding component 3 ensures that the float block 5 moves according to a preset track, and can be fixed on the inner wall of the protective housing 2 or the outer wall of the protective housing 2; thus, on the basis of example 1, this example gives another embodiment of the sensor guard.
As shown in fig. 10 to 11, the guide assembly 3 comprises a 7-shaped guide rod and a stop block 6, wherein the two 7-shaped guide rods are symmetrically arranged on the outer wall of the protective shell 2, the bottom of the 7-shaped guide rod is connected with the stop block 6, and the stop block 6 is positioned below the protective shell 2;
further, the float block 5 is of a second groove structure, the two 7-shaped guide rods respectively penetrate through the outer edges of grooves of the second groove structure, and the bottom size of the grooves of the second groove structure is larger than that of the protective shell 2;
the opening and closing structure 4 comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded in the side wall of the groove of the second groove structure, and the other annular magnet is arranged at the lower part of the protective shell 2 and penetrates through the protective shell 2;
as shown in fig. 10, after the liquid level drops, the second groove structure can be unlocked under the action of its own gravity, so that the second groove structure drops to the lowest part of the guide post, at this time, the internal space of the protective housing 2 is communicated with the outside, and the space where the sensing element is located is in an open state;
as shown in fig. 11, when the liquid level rises, the second groove structure is pushed to move upwards along the guide post by using the buoyancy of the liquid without using an external force, and because the opening and closing structure 4 is two annular magnets with opposite polarities, when the two annular magnets approach, the lower part of the protective shell 2 is buckled in the groove of the second groove structure by using the magnetic force, so that the space where the sensing element is located is blocked.
It should be noted that the sensor protection device includes, but is not limited to, the above 6 structures, and does not cover all structural forms for protecting the sensing element based on the liquid buoyancy principle, i.e. all similar protection devices based on the liquid buoyancy principle should be regarded as the protection scope of the present utility model.
Example 3
On the basis of the above embodiment, the present embodiment provides a specific implementation manner of a sensing device;
in particular, the sensing device includes the sensing element 1 and the sensor guard in embodiment 1 or 2.
Further, the sensing element 1 is located on top of the inner wall of the protective housing 2, as shown in fig. 2 to 11;
the sensor element 1 may also be located on the float mass 5 as shown in fig. 12 to 13.
When the sensor protector is used on site, firstly, the sensor protector is installed at a fixed height, and the protective shell 2 is fixed on a wall and the like;
when the liquid level of the installation site is low, the float block 5 is unlocked by the gravity of the float block, the opening and closing structure 4 is unlocked and descends to the lowest end of the guide assembly 3, the space where the sensing element is located (the inner space of the protective shell 2) is communicated with the outside, and various parameters of the site can be detected;
when the liquid level of the installation site is higher, the float block 5 is subjected to buoyancy, and rises along the guide assembly 3 until the space where the sensing element is located (the inner space of the protective shell 2) is completely sealed and isolated from the outside, and the opening and closing structure 4 is triggered, so that the on-site liquid is prevented from entering the protective shell 2 to achieve the purpose of protecting the sensing element.
Further, a wiring hole is further formed in the protective shell 2 of the sensor protective device, and a data transmission line connected with the sensing element 1 is led out through the wiring hole; in order to improve the tightness, a sealing ring is arranged between the wiring hole and the data transmission line.
Further, the sensing element 1 may further transmit data by using a bluetooth wireless communication module, a LORA wireless communication module, an NB wireless communication module, a 4G wireless communication module, an NFC communication module, a Zigbee wireless communication module, or the like.
Specifically, the sensing element 1 may be a sensing element or a sensing element module, where the sensing element includes, but is not limited to, a gas sensor, a temperature sensor, a humidity sensor, an atmospheric pressure sensor, and the like, and the sensing element module is an integrated sensing element module including a sensing element, a power supply module, a signal processing circuit, a communication module, and the like.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same; while the utility model has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that: modifications may be made to the specific embodiments of the present utility model or equivalents may be substituted for part of the technical features thereof; without departing from the spirit of the utility model, it is intended to cover the scope of the utility model as claimed.
Claims (10)
1. A sensor protection device for preventing in-situ liquids from entering a space in which a sensing element is located, characterized by: the device comprises a protective shell, a guide assembly, a float block and an opening and closing structure arranged between the protective shell and the float block;
the protective shell is of a hollow structure with an opening at the bottom, and the guide assembly is fixedly arranged on the protective shell and extends to the position below the opening at the bottom of the protective shell;
the float block is arranged below the protective shell and moves up and down along the guide assembly;
when the float block is not submerged, the float block is positioned at the lowest part of the guide assembly, and a space where the sensing element is positioned is in an open state;
when the bottom opening of the protective shell is submerged, the protective shell is connected with the float block through the opening and closing structure so as to block the space where the sensing element is located.
2. The sensor guard of claim 1, wherein: the guide assembly comprises a connecting rod, a guide column and a stop block, wherein two ends of the connecting rod are fixedly arranged on the inner wall of the protective shell, one end of the guide column is vertically connected with the connecting rod, the other end of the guide column is connected with the stop block, and the stop block is positioned below the protective shell.
3. The sensor guard of claim 2, wherein: the float block is of a triangular pyramid structure, the bottom diameter of the triangular pyramid structure is larger than the inner diameter of the protective shell, and the top diameter of the triangular pyramid structure is smaller than the inner diameter of the protective shell;
the opening and closing structure comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded in the lower part of the triangular pyramid structure, and the other annular magnet is arranged on the inner wall of the protective shell.
4. The sensor guard of claim 2, wherein: the float block is of a first groove structure, and the guide column penetrates through the bottom of the first groove structure;
the size of the bottom of the groove of the first groove structure is larger than that of the protective shell;
the opening and closing structure comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded on the side wall of the groove of the first groove structure, and the other annular magnet is arranged at the lower part of the protective shell.
5. The sensor guard of claim 2, wherein: the float block is of a first convex structure, and the convex size of the first convex structure is smaller than the inner diameter size of the protective shell;
the opening and closing structure comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded on the convex part of the first convex structure, and the other annular magnet is arranged on the inner wall of the protective shell;
when the float block is positioned at the lowest part of the guide assembly, the convex part of the first convex structure is positioned below the protective shell.
6. The sensor guard of claim 2, wherein: the float block is of a second convex structure, the opening and closing structure comprises two annular magnets with opposite polarities, one annular magnet is embedded on a convex part of the second convex structure, and the other annular magnet is arranged on the inner wall of the protective shell;
when the float block is positioned at the lowest position of the guide assembly, the convex part of the convex structure is positioned in the protective shell, and a gap is arranged between the convex part of the second convex structure and the inner wall of the protective shell.
7. The sensor guard of claim 1, wherein: the guide assembly comprises 7-shaped guide rods and a stop block, the 7-shaped guide rods are symmetrically arranged on the outer wall of the protective shell, the bottom of each 7-shaped guide rod is connected with the stop block, and the stop block is located below the protective shell.
8. The sensor guard of claim 7, wherein: the float block is of a second groove structure, and the two 7-shaped guide rods respectively penetrate through the outer edges of the grooves of the second groove structure;
the bottom size of the groove of the second groove structure is larger than the size of the protective shell;
the opening and closing structure comprises two annular magnets with opposite polarities, wherein one annular magnet is embedded on the side wall of the groove of the second groove structure, and the other annular magnet is arranged at the lower part of the protective shell.
9. A sensing device, characterized by: comprising a sensor element and a sensor protector according to any one of claims 1 to 8.
10. The sensing device of claim 9, wherein: the sensing element is positioned on the top of the inner wall of the protective housing or on the float block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223141242.1U CN219474657U (en) | 2022-11-25 | 2022-11-25 | Sensor protector and sensing device comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223141242.1U CN219474657U (en) | 2022-11-25 | 2022-11-25 | Sensor protector and sensing device comprising same |
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| Publication Number | Publication Date |
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| CN219474657U true CN219474657U (en) | 2023-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223141242.1U Active CN219474657U (en) | 2022-11-25 | 2022-11-25 | Sensor protector and sensing device comprising same |
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| CN (1) | CN219474657U (en) |
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- 2022-11-25 CN CN202223141242.1U patent/CN219474657U/en active Active
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