Liquid level detection protection device

Abstract

The utility model discloses a liquid level detection protection device, and relates to the technical field of sensors. The liquid level detection protection device comprises a shell, a detection piece, a first protection piece and a second protection piece, wherein the detection piece is arranged on the shell; the first protection piece is arranged at the bottom of the shell, and the first protection piece is arranged on the periphery of the detection piece in a surrounding mode; the second protection part is arranged at the bottom of the shell, and the second protection part is arranged on the periphery of the first protection part in a surrounding mode; the first protection piece is provided with a first detection part, the second protection piece is provided with a second detection part, and the detection piece is communicated with the external environment through the first detection part and the second detection part. According to the technical scheme, the misjudgment risk of the detection piece is reduced or even avoided, the detection performance of the detection piece is improved, and the production takt of a production line is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of sensors, in particular to a liquid level detection protection device. Background Art

[0002] Tank equipment, such as circulating tanks, have a dispersion function and when turned on, the dispersion disk rotates at high speed, causing the slurry to splash everywhere. The splashed slurry can easily touch the high liquid level sensor probe, causing the sensor to falsely alarm. After the alarm, the tank equipment needs to be shut down, disassembled for inspection and maintenance, causing production cycle delays and increased labor maintenance costs. Utility Model Content

[0003] The main purpose of the utility model is to provide a liquid level detection protection device, aiming to solve the technical problem in the prior art that the liquid level detection sensor is easily triggered by mistake when liquid splashes, causing delays and stoppages of the production line.

[0004] In order to achieve the above-mentioned purpose, the utility model proposes a liquid level detection protection device, which includes:

[0005] case;

[0006] A detection member, wherein the detection member is arranged on the housing;

[0007] A first protective member, which is disposed at the bottom of the housing and surrounds the periphery of the detection member;

[0008] A second protective member, the second protective member is arranged at the bottom of the housing, and the second protective member is arranged around the periphery of the first protective member;

[0009] The first protective member has a first detection portion, the second protective member has a second detection portion, and the detection member is connected to the external environment through the first detection portion and the second detection portion.

[0010] In one embodiment, the detection element comprises:

[0011] A mounting portion, the mounting portion being disposed in the housing;

[0012] A detection head, the detection head is connected to the mounting portion, and the detection head protrudes from the shell through the bottom of the shell;

[0013] The heights of the first detection portion and the second detection portion are higher than or equal to the height of the detection head.

[0014] In one embodiment, the first protective member includes a first protective cover, the first protective cover has a first accommodating cavity, the top of the first protective cover is connected to the bottom of the housing and wraps the detection head in the first accommodating cavity;

[0015] A through hole is formed on the side wall of the first protective cover to form the first detection portion, and the first detection portion is communicated with the first accommodating cavity.

[0016] In one embodiment, there is a gap between the detection head and the bottom of the first protective cover;

[0017] The first detection portion is in the shape of an elongated strip, the bottom of the first detection portion is flush with the height of the bottom of the first protective cover, and the top extends to a height higher than or equal to the height of the detection head.

[0018] In one embodiment, the second protective member includes a second protective cover, the second protective cover has a second accommodating cavity, the top of the second protective cover is connected to the bottom of the shell and wraps the first protective member in the second accommodating cavity;

[0019] A through hole is formed on the side wall of the second protective cover to form the second detection portion, and the bottom of the second protective cover is open, and the open hole and the second detection portion are both connected to the second accommodating cavity.

[0020] In one embodiment, the second detection portion is in the shape of a strip or includes a plurality of communicating holes arranged in sequence from top to bottom;

[0021] The height of the top of the second detection portion is higher than or equal to the height of the detection head, or the height of the communication hole located at the top is higher than or equal to the height of the detection head.

[0022] In one embodiment, the first detection portion and the second detection portion are staggered.

[0023] In one embodiment, an angle between a line connecting the first detection portion and the detection element and a line connecting the second detection portion and the detection element is 80° to 100°.

[0024] In one embodiment, there is a height difference between the bottom of the first protection member and the bottom of the second protection member, and the height of the bottom of the first protection member is higher than the height of the bottom of the second protection member.

[0025] In one embodiment, the first protective member and the second protective member are both detachably connected to the housing.

[0026] The technical solution of the utility model respectively arranges the first protective member and the second protective member on the outside of the detection member, and the first protective member and the second protective member wrap the detection member, thereby preventing splashing slurry from accidentally hitting the detection member, reducing or even avoiding the risk of misjudgment of the detection member, improving the detection performance of the detection member, and ensuring the production rhythm of the production line. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0028] Figure 1 A structural schematic diagram of an embodiment of a liquid level detection and protection device provided by the utility model;

[0029] Figure 2 A side view of another embodiment of the liquid level detection protection device provided by the utility model;

[0030] Figure 3 The present invention is a schematic structural diagram of another embodiment of the liquid level detection and protection device provided by the present invention.

[0031] Description of Figure Numbers:

[0032] Label name Label name 10 case 20 Test piece 21 Installation Department 22 Detection head 30 First protection piece 31 First protective cover 32 First detection unit 33 The first accommodating chamber 34 Base Plate 40 Second protective member 41 Second protective cover 42 Second detection department 421 Connecting hole 43 The second accommodating chamber

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0037] The utility model discloses a liquid level detection protection device, please refer to Figure 1 In one embodiment, the liquid level detection and protection device includes a housing 10 , a detection member 20 , a first protection member 30 and a second protection member 40 .

[0038] The detection member 20 is disposed on the housing 10. Usually, the housing 10 is installed above the liquid level to be detected. The housing 10 can be installed vertically, and when installed vertically, the detection member 20 is disposed at the bottom of the housing 10. Alternatively, the housing 10 can also be installed horizontally, and when installed horizontally, the detection member 20 can be adjusted to the left or right side of the housing 10 accordingly.

[0039] The first protection member 30 is also installed at the bottom of the housing 10 , and the first protection member 30 is disposed around the periphery of the detection member 20 . The second protection member 40 is disposed at the bottom of the housing 10 , and the second protection member 40 is disposed around the periphery of the first protection member 30 .

[0040] The first protective member 30 has a first detection portion 32 , the second protective member 40 has a second detection portion 42 , and the detection member 20 is connected to the external environment through the first detection portion 32 and the second detection portion 42 .

[0041] When the liquid level rises, the liquid enters the second protective member 40 through the second detection portion 42, and then enters the first protective member 30 through the first detection portion 32, and contacts the detection member 20, thereby triggering the detection member 20 to respond. Figure 1 The water flow direction A in .

[0042] When the liquid level does not change, the splashing liquid is blocked by the second protective member 40. Even if a small part of the splashing liquid enters the second protective member 40 from the first detection part 32, under the action of the first protective member 30, a second isolation can be performed to completely block the splashing liquid, thereby avoiding false triggering of the detection head 22.

[0043] The technical solution of the utility model respectively arranges the first protective member 30 and the second protective member 40 on the outer side of the detection member 20, and the first protective member 30 and the second protective member 40 wrap the detection member 20, thereby preventing the splashing slurry from accidentally hitting the detection member 20, reducing or even avoiding the risk of misjudgment of the detection member 20, improving the detection performance of the detection member 20, and ensuring the production rhythm of the production line.

[0044] In one embodiment, please refer to Figure 1 The detection member 20 includes a mounting portion 21 and a detection head 22, wherein the mounting portion 21 is disposed in the shell 10; the detection head 22 is connected to the mounting portion 21, and the detection head 22 protrudes from the shell 10 from the bottom of the shell 10; the heights of the first detection portion 32 and the second detection portion 42 are aligned with the position of the detection head 22.

[0045] The detection head 22 is a highly sensitive sensor element, which is installed in the mounting portion 21. The mounting portion 21 is used to be fixedly adapted to the housing 10. During assembly, the position of the mounting portion 21 is adjusted, and the detection head 22 is extended from the bottom of the housing 10 so as to contact with the external liquid to realize the detection function.

[0046] The mounting portion 21 and the housing 10 may be made of a plastic material with a light structure and corrosion resistance, or may be made of a metal material with a relatively stable structure.

[0047] In order to ensure that the detection head 22 can stably and accurately detect the change of the liquid level. When installing the first protective member 30 and the second protective member 40, the height of the first detection part 32 and the second detection part 42 should be kept consistent with the height of the detection head 22, or the height of the first detection part 32 and the second detection part 42 can be slightly higher than the detection head 22. In this way, when the liquid level rises to the position of the detection head 22, it can contact the detection head 22.

[0048] When the position of the first detection part 32 or the second detection part 42 is too low, the liquid level cannot rise normally inside the first protective member 30 or the second protective member 40 under the influence of air pressure. If the first detection part 32 or the second detection part 42 is too high, the detection head 22 is easily exposed to the external environment and easily contacted with splashing liquid.

[0049] In one embodiment, the first protective member 30 includes a first protective cover 31, and the first protective cover 31 has a first accommodating cavity 33, the top of the first protective cover 31 is connected to the bottom of the shell 10 and wraps the detection head 22 in the first accommodating cavity 33; the side wall of the first protective cover 31 has a through hole to form the first detection part 32, and the first detection part 32 is connected to the first accommodating cavity 33.

[0050] Please refer to Figure 1 The first protective cover 31 adopts a cylindrical structure, and the interior is hollowed out to form a first accommodating cavity 33 , and a hole is drilled on the side wall of the first protective cover 31 to form a first detection portion 32 .

[0051] The detection portion is in the shape of a long strip, and extends upward from the bottom of the first protective cover 31 until it is flush with the height of the detection head 22 or higher than the detection head 22 .

[0052] It should be noted that the bottom of the first detection portion 32 should be flush with the bottom wall of the first protective cover 31, so as to ensure that the accumulated water entering the first protective cover 31 can be discharged in time after the liquid level drops.

[0053] By providing a bottom plate 34 at the bottom of the first protective cover 31 , liquid can only enter the first protective cover 31 from the first detection portion 32 opened on the side wall, further improving the anti-mistouch effect of the detection head 22 .

[0054] The number of the first detection parts 32 can be multiple and arranged in sequence along the circumferential direction of the side wall of the first protective cover 31. In this embodiment, two first detection parts 32 are provided as an example, and the two first detection parts 32 are arranged on the side wall of the first protective cover 31 opposite to each other.

[0055] A small gap is reserved between the lowest end of the detection head 22 and the upper surface of the bottom plate 34 of the protective cover. When the liquid level drops and some liquid still remains on the bottom plate 34, the detection head 22 is prevented from making a false touch, thereby improving the detection accuracy and reliability of the detection head 22.

[0056] In one embodiment, please refer to Figure 1 The second protective member 40 includes a second protective cover 41, and the second protective cover 41 has a second accommodating cavity 43. The top of the second protective cover 41 is connected to the bottom of the shell 10 and wraps the first protective member 30 in the second accommodating cavity 43; the side wall of the second protective cover 41 has a through hole to form the second detection part 42, and the bottom of the second protective cover 41 is open, and the opening and the second detection part 42 are both connected to the second accommodating cavity 43.

[0057] The second protective cover 41 also adopts a cylindrical structure and a hollow design to form the second accommodating cavity 43 inside. The first protective cover 31 and the second protective cover 41 are arranged concentrically.

[0058] In this embodiment, the bottom of the second protective cover 41 is an open structure, which further reduces the influence of the air in the second protective cover 41 and allows the liquid surface to enter the second protective cover 41 in time.

[0059] In this embodiment, the second detection portion 42 has a variety of configurations, for example, a long strip structure, similar to the first detection portion 32, extending upward from the bottom of the second protective cover 41 until it is flush with the height of the detection head 22 or slightly higher than the detection head 22. In addition, the second detection portion 42 can also be arranged in a manner that a plurality of connecting holes 421 are arranged at intervals, extending upward from the bottom of the second protective cover 41. The shape of the connecting hole 421 can be adjusted according to actual needs, please refer to Figure 3 , such as circle, diamond, etc.

[0060] In one embodiment, the first detection portion 32 and the second detection portion 42 are staggered to avoid the first detection portion 32 and the second detection portion 42 being on a straight line to avoid splashing liquid directly entering the first detection portion 32 from the second detection portion 42, thereby improving the splash prevention effect.

[0061] Normally, the number of the first detection part 32 and the second detection part 42 are both set to two, and the angle between the line connecting the first detection part 32 to the detection member 20 and the line connecting the second detection part 42 to the detection member 20 is optimally set to 90°, and the error range is within 10°, that is, 80°~100°.

[0062] In one embodiment, the bottom of the first protective cover 31 may be set as an open structure, and a bottom plate 34 may be set at the bottom of the second protective cover 41. The installation position of the bottom plate 34 may be adjusted according to different usage scenarios.

[0063] In one embodiment, please refer to Figure 2 To further improve the anti-splashing effect, there is a height difference between the bottom of the first protective member 30 and the bottom of the second protective member 40 .

[0064] The bottom height of the first protective member 30 is higher than the bottom height of the second protective member 40. When the bottom height of the first protective member 30 is too high, the first detection portion 32 is easily exposed to the external environment, and the splashing liquid can directly enter the first protective cover 31 from the first detection portion 32.

[0065] Therefore, by setting the bottom of the second protective cover 41 at a position lower than the first protective cover 31 , it is possible to effectively prevent splashing liquid from entering the first protective cover 31 .

[0066] In one embodiment, the first protective member 30 and the second protective member 40 are both detachably connected to the housing. A threaded column structure can be installed on the top of the first protective member 30 and the second protective member 40, and a corresponding threaded hole is provided on the bottom of the housing, and the connection is made through threaded matching. In the later maintenance and care process, the first protective member 30 and the second protective member 40 can be removed more easily, thereby improving the convenience of work.

[0067] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A liquid level detection protection device, characterized in that: The liquid level detection protection device comprises: case; A detection member, wherein the detection member is arranged on the housing; A first protective member, which is disposed at the bottom of the housing and surrounds the periphery of the detection member; A second protective member, wherein the second protective member is disposed at the bottom of the housing and is disposed around the first protective member; The first protective member has a first detection portion, the second protective member has a second detection portion, and the detection member is connected to the external environment through the first detection portion and the second detection portion.

2. The liquid level detection protection device according to claim 1, characterized in that: The detection member comprises: A mounting portion, the mounting portion being disposed in the housing; A detection head, the detection head is connected to the mounting portion, and the detection head protrudes from the shell through the bottom of the shell; The heights of the first detection portion and the second detection portion are higher than or equal to the height of the detection head.

3. The liquid level detection protection device according to claim 2, characterized in that: The first protective member comprises a first protective cover, wherein the first protective cover has a first accommodating cavity, the top of the first protective cover is connected to the bottom of the housing and wraps the detection head in the first accommodating cavity; A through hole is formed on the side wall of the first protective cover to form the first detection portion, and the first detection portion is communicated with the first accommodating cavity.

4. The liquid level detection protection device according to claim 3, characterized in that: There is a gap between the detection head and the bottom of the first protective cover; The first detection portion is in the shape of an elongated strip, the bottom of the first detection portion is flush with the height of the bottom of the first protective cover, and the top of the first detection portion extends to a height higher than or equal to the height of the detection head.

5. The liquid level detection protection device according to claim 2, characterized in that: The second protective member comprises a second protective cover, the second protective cover has a second accommodating cavity, the top of the second protective cover is connected to the bottom of the shell and wraps the first protective member in the second accommodating cavity; A through hole is formed on the side wall of the second protective cover to form the second detection portion, and the bottom of the second protective cover is open. The open hole and the second detection portion are both connected to the second accommodating cavity.

6. The liquid level detection protection device according to claim 5, characterized in that: The second detection portion is in the shape of a long strip or includes a plurality of communicating holes arranged in sequence from top to bottom; The height of the top of the second detection portion is higher than or equal to the height of the detection head, or the height of the connecting hole located at the top is higher than or equal to the height of the detection head.

7. The liquid level detection protection device according to any one of claims 1 to 6, characterized in that: The first detection portion and the second detection portion are arranged in a staggered manner.

8. The liquid level detection protection device according to claim 7, characterized in that: The angle between the line connecting the first detection part to the detection element and the line connecting the second detection part to the detection element is 80° to 100°.

9. The liquid level detection protection device according to any one of claims 1 to 6, characterized in that: There is a height difference between the bottom of the first protection member and the bottom of the second protection member, and the bottom height of the first protection member is higher than the bottom height of the second protection member.

10. The liquid level detection protection device according to claim 1, characterized in that: The first protective member and the second protective member are both detachably connected to the shell.

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