Sensor protective cover and sensor mounting structure

Abstract

The utility model provides a sensor protective cover and a sensor installation structure, the sensor protective cover comprises a protective cover body provided with an inner cavity and an opening, and a protective plate which is connected with the protective cover body in a turnover manner so as to close and open the opening, and the protective cover body is also provided with a probe extending hole communicated with the inner cavity, and a CDA air inlet pipe, the CDA air inlet pipe continuously introduces compressed dry air into the inner cavity, the sensor installation structure comprises the sensor protection cover and a sensor installed in the sensor protection cover, and the sensor comprises a sensor body, a measuring probe and a tail air cylinder pushing the measuring probe to stretch out. An exhaust port of a tail air cylinder of the sensor is communicated with an air inlet pipe to introduce compressed dry air into the sensor main body so as to keep micro-positive pressure in the sensor main body. The method is suitable for high-precision sensor waterproof protection in the glass substrate side edge processing process.

Description

Technical Field

[0001] The utility model belongs to the technical field of glass processing, and particularly relates to a sensor protective cover and a sensor installation structure. Background Art

[0002] During the production of liquid crystal glass substrates and other flat glass, the side edges of the glass need to be ground to improve their strength and reduce particle buildup. However, with the development of the high-generation display industry, not only are glass edge specifications increasingly stringent, but glass production sizes are also increasing, with ever-faster cycle times and higher processing speeds. This necessitates a reduction in the feed rate during glass edge grinding to prevent edge defects such as chipping and edge burning. Improving the accuracy of glass edge processing has become an ongoing research challenge in glass processing technology. In recent years, high-precision sensors have played an increasingly important role in glass edge processing. The grinding process is complex, with the presence of large amounts of water and air. To ensure proper sensor operation, existing technology employs a protective cover over the sensor. The current cover consists of three bolted sections, which inevitably have gaps and offer limited water resistance. The sensors used in the glass substrate industry have an accuracy of up to 0.001mm. During production, the sensors are activated at least once every 15 seconds, resulting in frequent use. With current waterproof ratings, the sensor lifespan is unsatisfactory, with frequent failures, sometimes as little as one month, significantly impacting production. Moreover, every time a sensor is replaced, the three parts of the protective cover connected by bolts must be completely removed, which is time-consuming and seriously affects the utilization rate of the production line equipment. Utility Model Content

[0003] The purpose of the utility model is to solve the deficiencies of the prior art and to provide a sensor protective cover and a sensor mounting structure with good waterproof effect.

[0004] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0005] Based on one aspect of the present invention, a sensor protective cover is provided, comprising a protective cover body having an inner cavity and an opening, and a protective plate that can be flipped and connected to the protective cover body to close and open the opening. The protective cover body is also provided with a probe extension hole connected to the inner cavity and a CDA air inlet pipe, and the CDA air inlet pipe continuously supplies compressed dry air into the inner cavity.

[0006] In one embodiment, a waterproof baffle is provided on the protective cover body, extending along the extension direction of the sensor measuring probe relative to the probe extension hole. The waterproof baffle is located above the probe extension hole and is used to prevent a large amount of water from splashing onto the sensor measuring probe and the sensor body, causing damage to the sensor.

[0007] In one embodiment, a waist hole is provided on the mounting surface of the protective cover body for fixing the sensor. The length direction of the waist hole is consistent with the length direction of the sensor measuring probe. The sensor is installed in the inner cavity of the protective cover through the waist hole. During installation, the specific installation position of the sensor can be fine-tuned along the length direction of the waist hole, and it is also compatible with the installation of sensors of different lengths.

[0008] In one embodiment, the guard plate is flipably connected to the protective cover body via a hinge, and the movable end of the guard plate is fixed to the protective cover body via a buckle.

[0009] In one embodiment, a sealing strip is provided between the inner side surface of the guard plate and the edge of the opening.

[0010] In one embodiment, the protective cover body is an integrated structure.

[0011] Based on another aspect of the present invention, a sensor mounting structure is provided, comprising a sensor protective cover as described in any one of the above items and a sensor installed in the sensor protective cover, the sensor comprising a sensor body, a measuring probe and a tail cylinder for pushing the measuring probe out of the probe extension hole, the exhaust port of the tail cylinder of the sensor is connected to an intake pipe to introduce compressed dry air into the sensor body to maintain a slight positive pressure in the sensor body.

[0012] In one embodiment, the measuring probe is connected to the sensor body via a telescopic shield. A probe shield is further connected to the measuring probe, and the probe shield covers the telescopic shield.

[0013] In one embodiment, the intake pressure of the tail cylinder is 0.25 MPa, and the intake pressure of the intake pipe connected to the exhaust port of the tail cylinder is 0.04 MPa.

[0014] In one embodiment, the intake pipe of the tail cylinder and the intake pipe communicating with the tail cylinder exhaust port pass through an opening on the protective cover body, and a rubber ring that is interference-fitted with the intake pipe is provided at the opening of the protective cover body.

[0015] Compared with the prior art, the sensor protective cover and sensor mounting structure of the present invention adopt an integrated structure for the protective cover body, which greatly improves the waterproof performance. The guard plate can be flipped and connected to the protective cover body by a hinge, and the internal sensor can be disassembled and assembled without disassembling the protective cover body, which greatly shortens the replacement time when the sensor is damaged, reduces the production line downtime, and improves the utilization rate of production equipment. A CDA air inlet pipe is provided on the protective cover body to continuously introduce compressed dry air into the inner cavity, keeping the inside of the protective cover dry, further improving the use environment of the sensor, and adding 0.04Mpa of CDA to the exhaust port of the tail cylinder of the sensor. It can maintain a slight positive pressure in the cavity of the sensor body 21 without affecting the working ability of the sensor, preventing surrounding water vapor from entering the cavity and damaging the circuit board, fundamentally solving the problem that the sensor is easily infiltrated with water and burns the circuit board and other components in the side processing environment of the glass substrate, greatly reducing the possibility of the sensor being damaged by water ingress, and can be better suitable for high-precision sensor waterproof protection in the side processing environment of the glass substrate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a three-dimensional structural diagram of an embodiment of a sensor mounting structure of the present invention;

[0017] Figure 2 for Figure 1 A front view of the sensor mounting structure shown;

[0018] Figure 3 for Figure 2 A schematic diagram of the structure of the sensor installation structure shown after the guard plate of the sensor protective cover is removed;

[0019] Figure 4 for Figure 1 Rear view of the sensor mounting structure shown.

[0020] Explanation of the reference numerals: 1 sensor protective cover, 11 inner cavity, 12 opening, 13 protective cover body, 131 mounting surface, 133 waist hole, 14 guard plate, 141 hinge, 143 buckle, 15 probe extension hole, 16 CDA air intake pipe, 17 waterproof baffle, 18 sealing strip, 2 sensor, 21 sensor body, 22 measuring probe, 23 tail cylinder, 24 telescopic protective cover, 25 probe protective cover, 26 tail cylinder air intake pipe, 27 exhaust port air intake pipe. DETAILED DESCRIPTION

[0021] See also Figure 1-4This embodiment provides a sensor mounting structure, comprising a sensor protective cover 1 and a sensor 2 mounted therein. The sensor protective cover 1 comprises a protective cover body 13 with an inner cavity 11 and an opening 12, and a protective plate 14 reversibly connected to the protective cover body 13 to seal and open the opening 12. The protective cover body 13 is a one-piece structure. This integrated design simplifies the overall structure and, in combination with the reversible protective plate 14, reduces sensor replacement time and improves production line utilization. The protective plate 14 is reversibly connected to the protective cover body 13 via a hinge 141. The movable end of the protective plate 14 is secured to the protective cover body 13 via a buckle 143. A sealing strip 18 is provided between the inner side of the protective plate 14 and the edge of the opening 12 to minimize gaps in the protective cover. Furthermore, the protective cover body 13 is provided with a probe extension hole 15 communicating with the inner cavity 11 and a CDA air inlet pipe 16. The CDA air inlet pipe 16 continuously supplies compressed dry air (CDA) into the inner cavity 11. When the sensor protective cover 1 is relatively airtight as a whole, CDA is introduced through the CDA air inlet pipe 16 to keep the interior of the protective cover dry, further improving the operating environment of the sensor.

[0022] In this embodiment, the probe extension hole 15 is designed to be appropriately sized to allow the sensor probe to extend freely while preventing process water from entering the sensor through this hole. A waterproof baffle 17 is provided on the protective cover body 13, extending in the direction of the sensor probe's extension relative to the probe extension hole 15. The length of the waterproof baffle 17 should be shorter than the extended length of the sensor probe 22 to prevent the waterproof baffle 17 from contacting and damaging the glass. A waist hole 133 is defined on the mounting surface 131 of the protective cover body 13 for securing the sensor. The length of the waist hole 133 aligns with the length of the sensor probe.

[0023] In this embodiment, sensor 2 comprises a sensor body 21, a measuring probe 22, and a tail cylinder 23 that propels the measuring probe 22 out of the probe extension hole 15. Sensor 2 is a contact-type displacement sensor. During measurement, the measuring probe 22 extends from the probe extension hole 15, strikes an object, and then retracts due to a force applied. The retraction distance is displayed by an amplifier, and this value serves as the measured value. The exhaust port of the tail cylinder of sensor 2 is connected to an air intake pipe, which introduces compressed dry air into the sensor body 21 to maintain a slight positive pressure within the sensor body 21, thereby achieving waterproofing of the sensor body. The sensor circuit board is installed in the inner cavity of the sensor body 21. The inner cavity of the sensor body 21 is in common with the exhaust port of the tail cylinder. The intake pressure of the tail cylinder 23 of the sensor is 0.25Mpa, and the intake pressure of the intake pipe connected to the exhaust port of the tail cylinder is 0.04Mpa. Normally, the exhaust port of the tail cylinder 23 is at normal pressure. By adding 0.04Mpa of CDA to the exhaust port of the tail cylinder, the cavity of the sensor body 21 can be kept at a slight positive pressure without affecting the working ability of the sensor, thereby preventing surrounding water vapor from entering the cavity and damaging the circuit board.

[0024] In this embodiment, the measuring probe 22 is connected to the sensor body 21 via a telescopic shield 24. A probe shield 25 is also attached to the measuring probe 22, covering the telescopic shield 24. A new probe shield 25 is added to the existing telescopic shield 24 at the front end of the sensor 2, where the measuring probe 22 is located. This integrated probe shield 25 and the measuring probe 22 function as a waterproof system, preventing damage to the sensor 2 even if the existing shield becomes fatigued and damaged due to frequent expansion and contraction. The air intake pipe for the tail cylinder 23, which connects to the tail cylinder exhaust port, exits through an opening in the protective shield body 13. A rubber ring is installed at the opening to create an interference fit with the air intake pipe.

[0025] The sensor installation structure of the present invention adopts an integrated structure for the protective cover body, which greatly improves the waterproof performance. The guard plate can be flipped and connected to the protective cover body by a hinge. The internal sensor can be disassembled and assembled without disassembling the protective cover body, which greatly shortens the replacement time when the sensor is damaged, reduces the production line downtime, and improves the utilization rate of production equipment. A CDA air inlet pipe is set on the protective cover body to continuously introduce compressed dry air into the inner cavity, which keeps the inside of the protective cover dry and further improves the use environment of the sensor. A 0.04Mpa CDA is added to the exhaust port of the tail cylinder of the sensor, which can maintain a slight positive pressure in the cavity of the sensor body 21 without affecting the working ability of the sensor, preventing surrounding water vapor from entering the cavity and damaging the circuit board. It fundamentally solves the problem that the sensor is easily infiltrated with water and burns the circuit board and other components in the side processing environment of the glass substrate, greatly reduces the possibility of the sensor being damaged by water ingress, and can be better suitable for high-precision sensor waterproof protection in the side processing environment of the glass substrate.

[0026] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of protection of the present application is limited to these examples. In line with the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of different aspects of one or more embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0027] The one or more embodiments of this application are intended to encompass all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this application should be included in the scope of protection of this application.

Claims

1. A sensor protective cover, characterized in that: The invention comprises a protective cover body (13) provided with an inner cavity (11) and an opening (12), and a protective plate (14) which is flippably connected to the protective cover body (13) to close and open the opening (12); the protective cover body (13) is also provided with a probe extension hole (15) communicating with the inner cavity (11) and a CDA air inlet pipe (16); the CDA air inlet pipe (16) continuously introduces compressed dry air into the inner cavity (11).

2. The sensor protective cover according to claim 1, wherein: A waterproof baffle (17) is provided on the protective cover body (13) and extends relative to the probe extension hole (15) along the extension direction of the sensor measuring probe.

3. The sensor protective cover according to claim 1, wherein: A waist hole (133) is provided on the mounting surface (131) of the protective cover body (13) for fixing the sensor, and the length direction of the waist hole (133) is consistent with the length direction of the sensor measuring probe.

4. The sensor protective cover according to claim 1, wherein: The guard plate (14) is flipably connected to the protective cover body (13) via a hinge (141), and the movable end of the guard plate (14) is fixed to the protective cover body (13) via a buckle (143).

5. The sensor protective cover according to claim 1, wherein: A sealing strip (18) is provided between the inner side surface of the guard plate (14) and the edge of the opening (12).

6. The sensor protective cover according to claim 1, wherein: The protective cover body (13) is an integrated structure.

7. A sensor mounting structure, characterized in that: The invention comprises a sensor protective cover according to any one of claims 1 to 6 and a sensor (2) installed in the sensor protective cover, wherein the sensor (2) comprises a sensor body (21), a measuring probe (22) and a tail cylinder (23) for pushing the measuring probe (22) out of the probe extension hole (15), and an exhaust port of the tail cylinder of the sensor (2) is connected to an intake pipe to introduce compressed dry air into the sensor body (21) to maintain a slightly positive pressure in the sensor body (21).

8. The sensor mounting structure according to claim 7, wherein: The measuring probe (22) is connected to the sensor body (21) via a telescopic shield (24). A probe shield (25) is also connected to the measuring probe (22), and the probe shield (25) covers the telescopic shield (24).

9. The sensor mounting structure according to claim 7, wherein: The intake pressure of the tail cylinder (23) is 0.25 MPa, and the intake pressure of the intake pipe connected to the tail cylinder exhaust port is 0.04 MPa.

10. The sensor mounting structure according to claim 7, wherein: The intake pipe of the tail cylinder (23) and the intake pipe communicating with the tail cylinder exhaust port pass through an opening on the protective cover body (13), and a rubber ring having an interference fit with the intake pipe is provided at the opening of the protective cover body (13).

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