Cleaning mechanism of cavity sensor

Abstract

The invention provides a cavity sensor cleaning mechanism which is characterized in that a cavity sensor is connected with a detected piece, a detection channel of the cavity sensor comprises a detection front-end light-transmitting plate close to the detected piece and a detection rear-end light-transmitting plate far away from the detected piece, and a cleaning channel is formed between the detection front-end light-transmitting plate and the detection rear-end light-transmitting plate. The cleaning mechanism is arranged in the cleaning channel, an actuating rod of the cleaning mechanism is fixedly provided with a cleaning part, the radial section size of the cleaning part is consistent with that of the cleaning channel, and therefore the edge of the cleaning part is attached to the wall face of the cleaning channel. One end of the transmission mechanism is connected with the actuating rod, the other end of the transmission mechanism is connected with the external acting piece, and force is applied to the external acting piece, so that the force is transmitted to the actuating rod through the transmission mechanism, the actuating rod is driven to axially move in the cleaning channel, and the cleaning piece wipes the detection front-end light-transmitting plate and the detection rear-end light-transmitting plate.

Description

Technical Field

[0001] The present invention relates to the technical field of sensor detection, and in particular to a cleaning mechanism for a cavity sensor. Background Art

[0002] For vacuum pumps, vacuum valves and other devices, it is often necessary to test their vacuum degree in order to know the actual working effect of the vacuum pumps and vacuum valves. For the detection of vacuum devices such as vacuum pumps and vacuum valves, it is usually necessary to use photoelectric detection devices to detect their vacuum degree. Commonly used photoelectric detection devices such as infrared sensors use infrared rays for detection. During the deactivation process, it is necessary to keep the detection channel clean and free of impurities, otherwise it will affect the detection results. Summary of the invention

[0003] In order to overcome the above technical defects, the purpose of the present invention is to provide a cleaning mechanism for a cavity sensor to clean dust in a detection channel and ensure the reliability of the detection result.

[0004] The present invention discloses a cleaning mechanism of a cavity sensor, wherein the cavity sensor is connected to a measured object, the cavity sensor comprises a detection channel, the detection channel comprises a detection front-end light-transmitting plate close to the measured object and a detection rear-end light-transmitting plate away from the measured object, a cleaning channel is formed between the detection front-end light-transmitting plate and the detection rear-end light-transmitting plate, and the axial direction of the cleaning channel is perpendicular to the axial direction of the detection channel; the cleaning mechanism is arranged in the cleaning channel, the cleaning mechanism comprises a shell and an actuating rod, the shell is connected to the cleaning channel, the actuating rod is partially arranged in the cleaning channel and partially arranged in the shell ; A cleaning piece is fixedly provided on the part of the actuating rod arranged in the cleaning channel, and the radial cross-sectional size of the cleaning piece is consistent with the radial cross-sectional size of the cleaning channel, so that the edge of the cleaning piece fits with the wall surface of the cleaning channel; the cleaning mechanism also includes a transmission mechanism arranged in the shell, one end of the transmission mechanism is connected to the actuating rod, and the other end is connected to the external acting piece, and force is applied to the external acting piece, which is transmitted to the actuating rod through the transmission mechanism, driving the actuating rod to axially displace in the cleaning channel, so that the cleaning piece wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

[0005] Preferably, the transmission mechanism includes a first gear plate, and a circumferential edge of the first gear plate is provided with transmission teeth; the first gear plate is fixed to the housing through a first positioning shaft, and the axial direction of the first gear plate is perpendicular to the axial direction of the actuating rod; the actuating rod is provided with axially arranged tooth grooves, and when the first gear plate rotates, the transmission teeth are sequentially engaged with the tooth grooves; the external actuating member is provided on the first gear plate, and the external actuating member is rotated to rotate the first gear plate, thereby driving the actuating rod to axially displace, so that the cleaning member wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

[0006] Preferably, the transmission mechanism also includes a second gear plate meshed vertically with the first gear plate; the second gear plate is fixed to the housing through a second positioning shaft; the external actuator is arranged on the second gear plate, and the external actuator is rotated to rotate the second gear plate, thereby rotating the first gear plate.

[0007] Preferably, an axial groove is provided on the outer shell of the cleaning mechanism, and the external acting member extends to the outside of the shell through the axial groove; the external acting member is axially moved to cause axial displacement in the axial groove, thereby driving the axial displacement of the actuator rod, so that the cleaning member wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

[0008] Preferably, a snap ring is provided on the external acting member, and a plurality of axially arranged snap protrusions are provided on both sides of the axial slot, and the snap ring on the external acting member is snap-engaged with the snap protrusion at any position on the shell, thereby fixing the external acting member.

[0009] Preferably, the cleaning member is a cloth-like fabric, which is sleeved on a receiving block and is detachably connected to the receiving block; the receiving block is fixedly arranged at one end of the actuating rod, and the axial displacement of the actuating rod drives the axial displacement of the receiving block, thereby allowing the cleaning member to wipe the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

[0010] Preferably, the cleaning member is a block-shaped fabric, and the cloth-shaped fabric is detachably connected to one end of the actuating rod. The actuating rod is axially displaced, thereby driving the cleaning member to wipe the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

[0011] Preferably, a window is provided on the shell, and the cleaning member is moved to the window position, so that the cleaning member can be removed from the actuating rod and taken out.

[0012] Preferably, the actuating rod comprises an inner rod and an outer sleeve, two ends of the inner rod are fixedly connected to the cleaning channel and the outer shell of the cleaning mechanism, and the outer sleeve is sleeved on the inner rod.

[0013] Preferably, the cavity sensor is a photoelectric detection mechanism, and the detection light of the photoelectric detection mechanism acts on the device under test through the detection channel to detect the device under test.

[0014] Compared with the prior art, the above technical solution has the following beneficial effects:

[0015] 1. Through the cooperation of the actuating rod and the external acting member, the detection front-end light-transmitting plate and the detection rear-end light-transmitting plate can be wiped manually or automatically, thereby cleaning the detection channel and ensuring the reliability of the detection results;

[0016] 2. By providing an opening window, the cleaning part can be easily replaced and cleaned at any time without dismantling the entire cleaning mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic structural diagram of the cleaning mechanism of the cavity sensor provided by the present invention.

[0018] Figure 2 for Figure 1 Schematic diagram of the AA section of the cleaning mechanism of the cavity sensor

[0019] Among them: 1-detection channel, 2-cleaning mechanism, 201-actuating rod, 202-cleaning member, 203-external action member. DETAILED DESCRIPTION

[0020] The advantages of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0021] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0022] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0023] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0024] In the description of the present invention, it is necessary to understand that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0026] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0027] The present invention discloses a cleaning mechanism of a cavity sensor, which is used to clean the detection channel when the cavity sensor is connected to the measured object, so as to ensure the accuracy and reliability of the detection result. The cavity sensor here can be understood as a sensor for detecting and measuring the internal parameters of the cavity, which is usually used to measure and monitor physical quantities such as pressure, temperature, humidity, etc. in a closed cavity. The working principle and design of the cavity sensor vary according to the parameters to be measured. For example, photoelectric sensors, pressure sensors, temperature sensors, humidity sensors, etc., and the present invention is directed to photoelectric sensors. A photoelectric sensor is a sensor that uses the principle of photoelectric effect to detect and measure information such as the existence, position, distance, color, etc. of an object, and realizes the detection function by emitting a light source (usually infrared or laser) and receiving reflected or transmitted light. The cavity sensor of the present invention is connected to the measured object (usually a vacuum pump, a vacuum valve, etc.), and the detection light of the photoelectric detection mechanism acts on the measured object through the detection channel to detect the vacuum degree of the measured object.

[0028] See attached Figure 1-2 The cavity sensor includes a detection channel 1, which connects the transmitting part of the cavity sensor and the receiving part of the device under test, so that (for example) infrared rays of the cavity sensor reach the receiving part of the device under test (for example, the vacuum cavity) through the detection channel 1 to detect the vacuum degree of the receiving part (for example, the vacuum cavity).

[0029] The detection channel 1 includes two sections, one section is fixedly connected to the piece under test, and the other section is fixedly connected to the cavity sensor. During installation, the two sections are first fixedly connected to the piece under test and the cavity sensor respectively, and then the two sections are connected, thereby realizing the connection between the piece under test and the cavity sensor and also realizing the formation of the detection channel 1.

[0030] Therefore, the detection channel 1 includes a detection front-end light-transmitting plate close to the object to be tested (the section connected to the object to be tested), and a detection rear-end light-transmitting plate far from the object to be tested (the section connected to the cavity sensor). The detection front-end light-transmitting plate and the detection rear-end light-transmitting plate are usually made of glass, which has achieved the functions of light transmission and support. For the entire detection channel 1, when dust and dirt remain on the detection front-end light-transmitting plate and the detection rear-end light-transmitting plate, it will directly affect the light transmittance of the entire detection channel 1, thereby affecting the detection results. Therefore, it is necessary to clean the detection front-end light-transmitting plate and the detection rear-end light-transmitting plate.

[0031] Specifically, a cleaning area is formed between the detection front end light-transmitting plate and the detection rear end light-transmitting plate, and the cleaning area extends downward to form a cleaning channel including the cleaning area, and the axial direction of the cleaning channel is perpendicular to the axial direction of the detection channel 1 .

[0032] The cleaning mechanism 2 is arranged in the cleaning channel, and the cleaning mechanism 2 includes a shell and an actuating rod 201. The shell is connected to the cleaning channel, that is, the shell forms a portion of the cleaning area extending downward. It can be understood that the cleaning channel includes two parts, one part is the cleaning area formed between the detection front end light-transmitting plate and the detection rear end light-transmitting plate, and the other part is the portion of the cleaning area formed by the shell extending downward. The two parts are combined to form a cleaning channel for the actuating rod 201 to work. Specifically, the actuating rod 201 is partially arranged in the cleaning channel and partially arranged in the shell.

[0033] The part of the actuating rod 201 disposed in the cleaning channel is fixedly provided with a cleaning member 202, and the radial cross-sectional dimension of the cleaning member 202 is consistent with the radial cross-sectional dimension of the cleaning channel, so that the edge of the cleaning member 202 fits with the wall surface of the cleaning channel, and when the actuating rod 201 is axially displaced in the cleaning channel, the cleaning member 202 can comprehensively clean the wall surface of the cleaning channel, that is, detect the front end light-transmitting plate and the rear end light-transmitting plate.

[0034] The cleaning mechanism 2 also includes a transmission mechanism arranged in the shell, one end of the transmission mechanism is connected to the actuating rod 201, and the other end is connected to the external acting member 203. Force is applied to the external acting member 203, which is transmitted to the actuating rod 201 through the transmission mechanism, driving the actuating rod 201 to axially displace in the cleaning channel, so that the cleaning member 202 wipes the front end light-transmitting plate and the rear end light-transmitting plate of the detection.

[0035] The present invention provides two implementation schemes for the cooperation between the transmission mechanism and the external acting member 203, that is, the operation modes for the operator, one of which is the rotation of the external acting member 203 and the other is the sliding of the external acting member 203.

[0036] For the scheme of the external actuating member 203 rotating, the transmission mechanism is a gear plate, which is called the first gear plate in this embodiment, and the circumferential edge of the first gear plate is provided with transmission teeth. The first gear plate is fixed on the housing through the first positioning shaft, and the axial direction of the first gear plate is perpendicular to the axial direction of the actuating rod 201. It can be understood that in a viewing angle, if the measured object is on the left and the cavity sensor is on the right, the cleaning member 202 is partially between the measured object and the cavity sensor and partially below the measured object and the cavity sensor, and the actuating rod 201 is axially arranged in the cleaning channel, and the disk surface of the first gear plate faces the front of the viewing angle. The actuating rod 201 is provided with axially arranged tooth grooves, which can cooperate with the transmission teeth on the circumferential edge of the first gear plate. When the first gear plate rotates, the transmission teeth are sequentially inserted into the tooth grooves, thereby driving the axial displacement of the actuating rod 201. For example, when the first gear plate is rotated clockwise, the actuating rod 201 is displaced downward, and when the first gear plate is rotated counterclockwise, the actuating rod 201 is displaced upward. Thus, by rotating the first gear plate, the actuating rod 201 can be operated up and down, and by displacing the actuating rod 201 up and down, the cleaning member 202 fixed on the actuating rod 201 can be controlled to wipe the front light-transmitting plate and the detection rear light-transmitting plate.

[0037] For the convenience of the operator, the external action member 203 is arranged on the disk surface of the first gear disk. The external action member 203 is rotated to rotate the first gear disk, thereby driving the actuating rod 201 to axially displace, so that the cleaning member 202 wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

[0038] On the basis of this scheme, further optionally, the transmission mechanism also includes a second gear plate that is vertically meshed with the first gear plate, and the second gear plate is fixed to the shell through a second positioning shaft; the external acting member 203 is provided on the second gear plate, and the external acting member 203 is rotated to rotate the second gear plate, thereby rotating the first gear plate.

[0039] For this embodiment, compared with the previous basic embodiment, it can be regarded as a transmission mechanism with one more component, increasing from primary force transmission to secondary force transmission, and can also be regarded as upgrading from primary deceleration to secondary deceleration, so that the activity accuracy of the cleaning member 202 can be set more flexibly; in addition, it can also be regarded as an external action member 203 with one more component, which can change the direction of the force applied by the operator and increase the transfer reliability.

[0040] In this solution (including the basic embodiment and further optional embodiments), the external action member 203 can be set at a non-center point of the gear plate, or at the center point of the gear plate. When it is set at a non-center point of the gear plate, the gear plate can be rotated by rotating the external action member 203 with the center point as the center; when it is set at the center point of the gear plate, the gear plate can be rotated by directly rotating the external action member 203. No limitation is made here.

[0041] For the external action member 203 sliding type solution, an axial slot is provided on the outer shell of the cleaning mechanism 2, and the external action member 203 extends out of the shell through the axial slot. It can be understood that the external action member 203 is regarded as a part of the actuating rod 201. The external action member 203 is axially moved to make it axially displaced in the axial slot, thereby driving the actuating rod 201 to axially displace, so that the cleaning member 202 wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

[0042] Further optionally, a snap ring is provided on the external action member 203, and a plurality of axially arranged snap projections are provided on both sides of the axial slot, and the snap ring on the external action member 203 is snapped with a snap projection at any position on the shell, thereby fixing the external action member 203 and further fixing the position of the cleaning member 202. By providing the snap ring and the snap projection, the cleaning member 202 can be fixed at any position.

[0043] Preferably, the cleaning member 202 of the present invention is a cloth-like fabric (e.g., a cloth block or a rag), which is sleeved on a receiving block. The receiving block is fixedly arranged at one end of the actuating rod 201, and the actuating rod 201 is axially displaced, thereby driving the receiving block to axially displace, so that the cleaning member 202 wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate. The cloth-like fabric is detachably connected to the receiving block, and when the cleaning member 202 needs to be replaced, the cloth-like fabric can be directly removed from the receiving block.

[0044] In another preferred embodiment, the cleaning member 202 of the present invention is a block of fabric (e.g., a sponge block), which is detachably connected to one end of the actuating rod 201. The actuating rod 201 is axially displaced, thereby driving the cleaning member 202 to wipe the detection front light-transmitting plate and the detection rear light-transmitting plate. When the cleaning member 202 needs to be replaced, the block of fabric can be directly removed from the actuating rod 201.

[0045] Preferably, the cleaning member 202 needs to be replaced frequently to ensure that the cleaning member 202 is clean. The present invention is provided with a window on the outer shell of the cleaning mechanism 2, through which the cleaning member 202 is replaced. The window position is set at the lower limit position of the upper end of the actuating rod 201 (the installation position of the cleaning member 202) in the stroke, so that the operator can smoothly remove the cleaning member 202 from the window. Specifically, the external actuating member 203 is operated to drive the actuating rod 201 to move downward, so as to move the cleaning member 202 to the window position, so that the cleaning member 202 is removed from the actuating rod 201 and taken out.

[0046] Preferably, the actuating rod 201 includes an inner rod and an outer sleeve, the two ends of the inner rod are fixedly connected to the cleaning channel and the outer shell of the cleaning mechanism 2, thereby forming an axial support, the outer sleeve is sleeved on the inner rod, and the transmission mechanism is connected to the outer sleeve. Applying force to the external action member 203 drives the outer sleeve to axially displace on the inner rod. It can be understood that the inner rod is a guide rod and a support rod, which guides the axial displacement of the outer sleeve and prevents it from deviating, and provides axial support force for the displacement of the outer sleeve to ensure the stability of its displacement.

[0047] Preferably, the external actuator 203 may be a pneumatic component, through which the actuator rod 201 is automatically and regularly displaced up and down.

[0048] It should be noted that the embodiments of the present invention have better practicability and do not impose any form of limitation on the present invention. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modification or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A cleaning mechanism for a cavity sensor, It is characterized in that The cavity sensor is connected to the object to be tested, and the cavity sensor includes a detection channel, and the detection channel includes a detection front-end light-transmitting plate close to the object to be tested and a detection rear-end light-transmitting plate away from the object to be tested, and a cleaning channel is formed between the detection front-end light-transmitting plate and the detection rear-end light-transmitting plate, and the axial direction of the cleaning channel is perpendicular to the axial direction of the detection channel; The cleaning mechanism is arranged in the cleaning channel, and comprises a shell and an actuating rod, the shell is communicated with the cleaning channel, and the actuating rod is partially arranged in the cleaning channel and partially arranged in the shell; A cleaning member is fixedly disposed on the portion of the actuating rod disposed in the cleaning channel, and a radial cross-sectional dimension of the cleaning member is consistent with a radial cross-sectional dimension of the cleaning channel, so that an edge of the cleaning member fits with a wall surface of the cleaning channel; The cleaning mechanism also includes a transmission mechanism arranged in the shell, one end of the transmission mechanism is connected to the actuating rod, and the other end is connected to the external acting member, and force is applied to the external acting member, thereby transmitting force to the actuating rod through the transmission mechanism, driving the actuating rod to axially displace in the cleaning channel, so that the cleaning member wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

2. The cleaning mechanism of the cavity sensor according to claim 1, It is characterized in that The transmission mechanism comprises a first gear plate, a circumferential edge of which is provided with transmission teeth; the first gear plate is fixed on the housing through a first positioning shaft, and the axial direction of the first gear plate is perpendicular to the axial direction of the actuating rod; The actuating rod is provided with axially arranged tooth grooves, and when the first gear plate rotates, the transmission teeth are sequentially engaged in the tooth grooves; The external action member is arranged on the first gear plate. The external action member is rotated, thereby rotating the first gear plate, thereby driving the actuating rod to axially displace, so that the cleaning member wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

3. The cleaning mechanism of the cavity sensor according to claim 2, It is characterized in that The transmission mechanism further comprises a second gear plate meshed vertically with the first gear plate, and the second gear plate is fixed on the housing via a second positioning shaft; The external actuating member is arranged on the second gear plate, and the second gear plate is rotated by rotating the external actuating member, thereby rotating the first gear plate.

4. The cleaning mechanism of the cavity sensor according to claim 1, It is characterized in that The outer shell of the cleaning mechanism is provided with an axial slot, and the external action member extends out of the shell through the axial slot; The external acting member is axially moved to make it axially displaced in the axial slot, thereby driving the actuating rod to axially displace, so that the cleaning member wipes the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

5. The cleaning mechanism of the cavity sensor according to claim 4, It is characterized in that The external acting member is provided with a snap ring, and both sides of the axial slot are provided with a plurality of axially arranged snap protrusions. The snap ring on the external acting member is snap-engaged with the snap protrusion at any position on the shell, thereby fixing the external acting member.

6. The cleaning mechanism of the cavity sensor according to claim 1, It is characterized in that The cleaning member is a cloth-like fabric, the cloth-like fabric is sleeved on the receiving block, and the cloth-like fabric is detachably connected to the receiving block; The receiving block is fixedly arranged at one end of the actuating rod, and the axial displacement of the actuating rod drives the axial displacement of the receiving block, thereby enabling the cleaning member to wipe the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

7. The cleaning mechanism for the cavity sensor according to claim 1, It is characterized in that The cleaning member is a block-shaped fabric, and the cloth-shaped fabric is detachably connected to one end of the actuating rod. The actuating rod is axially displaced, thereby driving the cleaning member to wipe the detection front end light-transmitting plate and the detection rear end light-transmitting plate.

8. The cleaning mechanism for the cavity sensor according to claim 1, It is characterized in that The shell is provided with an opening window, and the cleaning member is moved to the opening window position, so that the cleaning member can be disassembled and taken out from the actuating rod.

9. The cleaning mechanism for the cavity sensor according to claim 1, It is characterized in that The actuating rod comprises an inner rod and an outer sleeve. Two ends of the inner rod are fixedly connected to the cleaning channel and the outer shell of the cleaning mechanism. The outer sleeve is sleeved on the inner rod.

10. The cleaning mechanism of the cavity sensor according to claim 1, It is characterized in that The cavity sensor is a photoelectric detection mechanism, and the detection light of the photoelectric detection mechanism acts on the measured object through the detection channel to detect the measured object.

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