Sensor protective shell for high-humidity environment

Abstract

The utility model discloses a sensor protective shell used in a high-humidity environment, and belongs to the technical field of sensor shells. The shell comprises a shell body and a mounting plate, the mounting plate is mounted at the top of the shell body, connecting holes are formed in the periphery of the mounting plate, screws are matched in the four connecting holes, annular grooves are formed in the periphery of the mounting plate, the annular grooves are communicated with the connecting holes, O-shaped rings are matched in the annular grooves, and the O-shaped rings make contact with the tops of the screws. The connecting hole is sealed through the O-shaped ring and the semi-spherical pad, the O-shaped ring is in contact with the annular groove, one circle of semi-spherical pad is subjected to pressure of the O-shaped ring and the annular groove, radial and axial composite deformation is generated when the semi-spherical pad is pressed, and a contact surface gap caused by machining errors or vibration is filled; therefore, the O-shaped ring and the annular groove fill a tiny gap at the joint of the connecting hole and the screw, a moisture permeation path is eliminated, the sealing performance of the joint of the screw and the connecting hole is guaranteed, and capillary permeation of water vapor along the thread gap is avoided.

Description

Technical Field

[0001] This utility model relates to the field of sensor housing technology, specifically a sensor protective housing for high humidity environments. Background Technology

[0002] Laser sensors are widely used in industrial inspection and environmental monitoring. Their core optical components are extremely sensitive to the humidity of the working environment, especially in high-humidity, highly corrosive, or condensation-prone industrial environments (such as chemical workshops, food processing plants, and outdoor monitoring stations). The sensor's protective housing needs to be sealed to prevent moisture intrusion. A Chinese patent (publication number: CN202222504631.X) discloses a protective housing for a laser sensor, including a protective box with an open bottom. The bottom of the protective box is removably sealed with a base plate. The base plate, sealing gasket, and protective box are detachably and sealed through screw holes, transition holes, and blind holes. However, this device still has certain shortcomings in use and needs further improvement.

[0003] In the existing sensor protective housing, screws pass through the connection holes of the base plate and are threadedly connected to the protective box. Since the protective housing of this device relies on sealing gaskets to achieve a planar seal between the base plate and the protective box, in a high-humidity environment, water vapor can seep through the tiny gap at the screw connection point and form capillary penetration along the thread gap, causing damage to the internal optical components of the sensor. Utility Model Content

[0004] The purpose of this invention is to provide a sensor protective housing for high humidity environments. By using O-rings and hemispherical gaskets to seal the connection holes, the problem of water vapor penetration between the screws and the connection holes is solved.

[0005] This utility model is achieved through the following technical solution:

[0006] This utility model is a sensor protective housing for high humidity environments, including a housing body and a mounting plate. The mounting plate is installed on the top of the housing body. Connection holes are opened around the four sides of the mounting plate, and screws are fitted into the four connection holes. Annular grooves are opened around the four sides of the mounting plate, and the annular grooves are connected to the connection holes. O-rings are fitted into the annular grooves, and the O-rings contact the tops of the screws. A ring of hemispherical pads is arranged in a ring at the bottom of the O-rings, and the bottoms of the hemispherical pads contact the annular grooves.

[0007] Furthermore, a sealing groove is provided on the top of the outer casing, and a sealing gasket is installed inside the sealing groove.

[0008] Furthermore, a mounting groove is provided at the bottom of the mounting plate, and a sealing top gasket is installed in the mounting groove.

[0009] Furthermore, the bottom of the sealing top gasket has a flange, and the top of the sealing bottom gasket has a groove that matches the flange.

[0010] Furthermore, threaded holes are provided around the perimeter of the outer casing, and the bottom end of each screw is threaded into the corresponding threaded hole.

[0011] This utility model has the following beneficial effects:

[0012] This utility model seals the connection hole by setting an O-ring and a hemispherical washer. The O-ring contacts the annular groove, and a ring of hemispherical washer is subjected to the pressure of the O-ring and the annular groove. When under pressure, it generates radial and axial composite deformation, filling the gap of the contact surface caused by processing errors or vibration. In this way, the O-ring and the annular groove fill the tiny gap at the connection between the connection hole and the screw, eliminating the moisture penetration path, ensuring the sealing of the connection between the screw and the connection hole, and preventing water vapor from forming capillary penetration along the thread gap.

[0013] This utility model seals the shell body and the mounting plate by setting a flange and a groove. The cooperation of the flange and the groove forms a double sealing mechanism, which effectively prevents the penetration of liquid, gas or dust. The elastic deformation of the sealing bottom gasket and the sealing top gasket can fill the tiny gaps, ensuring the reliability of the seal. In addition, the flange and the groove make the sealing bottom gasket and the sealing top gasket less likely to shift when under pressure, reducing the risk of seal failure caused by vibration or temperature changes.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the protective casing;

[0016] Figure 2 This is a schematic diagram of the outer shell body;

[0017] Figure 3 This is a structural diagram of the mounting plate;

[0018] Figure 4 This is a structural diagram of the mounting plate and screws;

[0019] Figure 5 This is a schematic diagram of the structure of the O-ring and the hemispherical pad.

[0020] In the diagram: 1. Outer shell body; 101. Sealing groove; 102. Threaded hole; 2. Mounting plate; 201. Connecting hole; 202. Annular groove; 203. Mounting groove; 3. Screw; 4. O-ring; 5. Hemispherical gasket; 6. Sealing bottom gasket; 601. Groove; 7. Sealing top gasket; 701. Flange. Detailed Implementation

[0021] 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 protection scope of the present utility model.

[0022] Please see Figure 1-4 This utility model provides a technical solution: a sensor protective housing for high humidity environments, comprising a housing body 1 and a mounting plate 2. The housing body 1 has threaded holes 102 around its perimeter. The bottom end of each screw 3 is threaded into the corresponding threaded hole 102. When fixing the housing body 1 and the mounting plate 2, the screws 3 are threaded into the threaded holes 102 to fix the housing body 1 and the mounting plate 2. The mounting plate 2 is mounted on the top of the housing body 1. The mounting plate 2 has connecting holes 201 around its perimeter, and each of the four connecting holes 201 has a screw 3 fitted into it. The mounting plate 2 also has annular grooves 202 around its perimeter, which communicate with the connecting holes 201. O-rings 4 fit into the annular grooves 202, and the O-rings 4 contact the tops of the screws 3. The bottom of the O-ring 4 has a ring of hemispherical pads 5 arranged in a ring. The bottom of the ring of hemispherical pads 5 contacts the annular groove 202. When installing the outer shell 1 and the mounting plate 2, the O-ring 4 is moved from the bottom end of the screw 3 to the top and is fitted onto the top end of the screw 3, contacting the nut of the screw 3. Then the screw 3 is inserted into the connecting hole 201 and rotated, so that the screw 3 is threaded into the threaded hole 102. As the screw 3 continues to move to the bottom, the nut at the top of the screw 3 contacts the top of the O-ring 4 and presses the O-ring 4 to the bottom, so that the O-ring 4 contacts the annular groove 202. At this time, the ring of hemispherical pads 5 is subjected to the pressure of the O-ring 4 and the annular groove 202. When compressed, it produces radial and axial composite deformation, filling the gap of the contact surface caused by processing errors or vibration.

[0023] The top of the outer casing 1 has a sealing groove 101, and a sealing base gasket 6 is installed in the sealing groove 101. The bottom of the mounting plate 2 has a mounting groove 203, and a sealing top gasket 7 is installed in the mounting groove 203. The bottom of the sealing top gasket 7 has a flange 701, and the top of the sealing base gasket 6 has a groove 601 that matches the flange 701. When the outer casing 1 and the mounting plate 2 are fixed by screws 3, the sealing top gasket 7 in the mounting groove 203 contacts the sealing base gasket 6 in the sealing groove 101, so that the flange 701 engages with the groove 601. During the tightening of the screws 3, the sealing base gasket 6 and the sealing top gasket 7 are tightly engaged. The engagement of the flange 701 and the groove 601 forms a double sealing mechanism, effectively preventing the penetration of liquids, gases or dust.

[0024] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A sensor protective housing for high humidity environments, comprising a housing body (1) and a mounting plate (2), characterized in that: The top of the outer shell body (1) is equipped with an mounting plate (2), and the mounting plate (2) has connection holes (201) around its four sides. Each of the four connection holes (201) is fitted with a screw (3). The mounting plate (2) has annular grooves (202) around its perimeter. The annular grooves (202) are connected to the connecting holes (201). An O-ring (4) fits inside the annular groove (202). The O-ring (4) contacts the top of the screw (3). The bottom of the O-ring (4) has a ring of hemispherical pads (5) arranged in a ring. The bottom of the ring of hemispherical pads (5) contacts the annular groove (202).

2. The sensor protective housing for high humidity environments according to claim 1, characterized in that, The top of the outer shell body (1) is provided with a sealing groove (101), and a sealing base gasket (6) is installed in the sealing groove (101).

3. A sensor protective housing for high humidity environments according to claim 2, characterized in that, The bottom of the mounting plate (2) is provided with a mounting groove (203), and a sealing top gasket (7) is installed in the mounting groove (203).

4. A sensor protective housing for high humidity environments according to claim 3, characterized in that, The sealing top gasket (7) has a flange (701) at its bottom, and the sealing bottom gasket (6) has a groove (601) at its top that matches the flange (701).

5. A sensor protective housing for high humidity environments according to claim 1, characterized in that, The outer shell body (1) is provided with threaded holes (102) around its perimeter, and the bottom end of each screw (3) is threaded into the corresponding threaded hole (102).

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