Capacitance vacuum gauge with dust filtering structure

Abstract

The utility model relates to the technical field of capacitance vacuum gauges, and discloses a capacitance vacuum gauge with a dust filtering structure, which comprises a vacuum gauge body, the upper surface of the vacuum gauge body is fixedly connected with an interface, and a filtering mechanism is arranged below the vacuum gauge body; the filtering mechanism comprises an air inlet pipe, the top end of the air inlet pipe is fixedly communicated with the air inlet of the vacuum gauge body, a filtering net is fixedly connected into the air inlet pipe, a fixing frame is fixedly connected to the inner wall of the air inlet pipe, a small servo motor is fixedly connected to the bottom face of the fixing frame, and a rotating rod is fixedly connected to the output end of the small servo motor. The rotating rod is rotationally connected into the filter screen, and three supporting plates are fixedly connected to the outer surface of the rotating rod. According to the capacitance vacuum gauge with the dust filtering structure, dust in the air can be filtered when the capacitance vacuum gauge is used, so that the dust is not easy to adhere to a diaphragm of the capacitance vacuum gauge too much, and the pressure value detection precision of the capacitance vacuum gauge is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of capacitive vacuum gauge, specifically a capacitive vacuum gauge with dust filtering structure. BACKGROUND

[0002] Capacitive vacuum gauge is also called capacitive diaphragm vacuum gauge, its measurement principle is that gas is introduced into the detection chamber through the gas inlet pipe, the detection diaphragm is deformed due to the gas pressure, the distance between the detection diaphragm and the fixed plate is changed, and the capacitance between the two is changed, and then the capacitance is measured by using the electrical method, according to the corresponding relationship between the capacitance change value and the gas change, the corresponding pressure value can be obtained.

[0003] The utility model with publication number CN222087203U discloses a capacitive diaphragm vacuum gauge, which comprises a shell, a containing cavity is formed in the shell, a diaphragm is arranged in the containing cavity and forms a vacuum cavity with the shell, at least two electrodes are arranged at least partially in the vacuum cavity, and the electrodes and the diaphragm jointly form a signal sampling structure.

[0004] By adopting the above technical scheme, since the metal block processing technology is simple and mature, compared with the electrodes made by silk screen printing process, the electrodes made of metal blocks have more uniform thickness and higher process quality, so that the accuracy of the capacitive diaphragm vacuum gauge can be improved, but in the above technical scheme, when the capacitive vacuum gauge is used, the measured air directly enters the inside of the capacitive vacuum gauge through the air inlet of the capacitive vacuum gauge, and the dust in the air cannot be filtered, so that the dust is easy to adhere to the diaphragm of the capacitive vacuum gauge, which affects the diaphragm capacitance change value, and further affects the pressure value detection accuracy of the capacitive vacuum gauge.

[0005] Therefore, the technical personnel in the art provide a capacitive vacuum gauge with dust filtering structure to solve the problems raised in the above background. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a capacitive vacuum gauge with dust filtering structure to solve the problems raised in the above background.

[0007] To achieve the above object, the utility model provides the following technical scheme:

[0008] A capacitive vacuum gauge with dust filtering structure, comprising a vacuum gauge body, an interface is fixedly connected to the upper surface of the vacuum gauge body, and a filtering mechanism is arranged below the vacuum gauge body.

[0009] The filtering mechanism includes an air inlet pipe, a top end of the air inlet pipe is fixedly communicated with an air inlet of a vacuum gauge body, an inner part of the air inlet pipe is fixedly connected with a filter screen, an inner wall of the air inlet pipe is fixedly connected with a fixing frame, a bottom surface of the fixing frame is fixedly connected with a small servo motor, an output end of the small servo motor is fixedly connected with a rotating rod, the rotating rod is rotatably connected in an inner part of the filter screen, an outer surface of the rotating rod is fixedly connected with three supporting plates, an upper part of each supporting plate is provided with a rubber scraper, an upper surface of each rubber scraper is in contact with a bottom surface of the filter screen, a bottom surface of each rubber scraper is fixedly connected with three compression springs, a bottom end of each compression spring is fixedly connected with an upper surface of the supporting plate, an inner part of the air inlet pipe is provided with a collecting frame, an upper surface of the collecting frame is fixedly connected with a conical cover, an outer surface of the conical cover is provided with air inlet holes arranged at equal distances.

[0010] As a further scheme of the utility model: the outer surface of the air inlet pipe is fixedly connected with a connecting sleeve, the outer surface of the connecting sleeve is provided with a threaded groove.

[0011] As a further scheme of the utility model: the upper surface and the bottom surface of the filter screen are fixedly connected with reinforcing rings, the outer surfaces of the two reinforcing rings are fixedly connected with the inner wall of the air inlet pipe.

[0012] As a further scheme of the utility model: the outer surface of the rotating rod is sleeved with an auxiliary bearing, the outer surface of the outer ring of the auxiliary bearing is fixedly connected with the inner wall of the filter screen.

[0013] As a further scheme of the utility model: the bottom surface of each supporting plate is fixedly connected with a reinforcing rib, the inner wall of each reinforcing rib is fixedly connected with the outer surface of the rotating rod.

[0014] As a further scheme of the utility model: the inner part of each compression spring is provided with a telescopic rod, the telescopic end of each telescopic rod is fixedly connected with the bottom surface of the rubber scraper, the bottom surface of each telescopic rod is fixedly connected with the upper surface of the supporting plate.

[0015] As a further scheme of the utility model: the outer surface of the collecting frame is fixedly connected with a connecting ring, the upper surface of the connecting ring is in contact with the bottom surface of the air inlet pipe, a plurality of fixed bolts are screw-connected in the inner part of the connecting ring, the top end of each fixed bolt penetrates into the inner part of the air inlet pipe, each fixed bolt is screw-connected with the air inlet pipe.

[0016] Compared with the prior art, the utility model has the advantages that:

[0017] The utility model discloses a filter mechanism is provided, not only can utilize filter screen to the air that enters the inside of air inlet pipe is filtered, prevent dust with air into vacuum meter body causes pollution, utilizes the power of small servo motor to drive rotating rod and support plate to rotate simultaneously, and cooperation spring provides the elasticity, can pass through rubber scraper blade cleaning filter screen bottom area gathers the dust, prevents dust too much and blocks filter screen and affects gas to enter vacuum meter body and carries out pressure detection smoothly, and the collecting frame cooperates conical cover and air inlet hole simultaneously, can guarantee that gas enters the inside of air inlet pipe smoothly, can collect the dust that rubber scraper blade scraped down, prevents dust and scatters and causes secondary pollution, plays the role that the dust in the air can be filtered when the capacitance vacuum gauge is used, makes dust not easy too much and adheres on capacitance vacuum gauge diaphragm, guarantees capacitance vacuum gauge pressure value detection precision. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a kind of capacitance vacuum gauge with dust filter structure structure diagram;

[0019] Figure 2 It is the sectional view stereoscopic structure diagram of the air inlet pipe in a kind of capacitance vacuum gauge with dust filter structure;

[0020] Figure 3 It is the sectional view stereoscopic structure diagram of filter screen in a kind of capacitance vacuum gauge with dust filter structure;

[0021] Figure 4 It is the sectional view stereoscopic structure diagram of collecting frame in a kind of capacitance vacuum gauge with dust filter structure.

[0022] In the drawing: 1, vacuum meter body;2, interface;3, filter mechanism;301, air inlet pipe;302, filter screen;303, fixed frame;304, small servo motor;305, rotating rod;306, support plate;307, rubber scraper blade;308, compression spring;309, collecting frame;310, conical cover;311, air inlet hole;4, connecting sleeve;5, screw groove;6, reinforcing ring;7, auxiliary bearing;8, reinforcing rib;9, telescopic rod;10, connecting ring;11, fixed bolt. DETAILED DESCRIPTION

[0023] Please refer to Figures 1-4 A kind of capacitance vacuum gauge with dust filter structure, including vacuum meter body 1, the upper surface of vacuum meter body 1 is fixedly connected with interface 2, and the lower portion of vacuum meter body 1 is provided with filter mechanism 3;

[0024] The filtering mechanism 3 comprises an air inlet pipe 301, the top end of the air inlet pipe 301 is fixedly communicated with the air inlet of the vacuum gauge body 1, the outer surface of the air inlet pipe 301 is fixedly connected with a connecting sleeve 4, the outer surface of the connecting sleeve 4 is provided with a threaded groove 5, the connecting sleeve 4 cooperates with the threaded groove 5, so that the air inlet pipe 301 can be connected with the equipment which needs to be detected for vacuum pressure, thereby ensuring the normal use of the vacuum gauge body 1

[0025] The air inlet pipe 301 is fixedly connected with a filter screen 302, the upper surface and the bottom surface of the filter screen 302 are fixedly connected with reinforcing rings 6, the outer surfaces of the two reinforcing rings 6 are fixedly connected with the inner wall of the air inlet pipe 301, the reinforcing rings 6 can increase the connection firmness of the filter screen 302 and the air inlet pipe 301, so that the filter screen 302 is not prone to loosening, and the service life of the filter screen 302 is increased.

[0026] The inner wall of the air inlet pipe 301 is fixedly connected with a fixing frame 303, the bottom surface of the fixing frame 303 is fixedly connected with a small servo motor 304, the output end of the small servo motor 304 is fixedly connected with a rotating rod 305, the rotating rod 305 is rotatably connected in the inner portion of the filter screen 302, the outer surface of the rotating rod 305 is sleeved with an auxiliary bearing 7, the outer surface of the outer ring of the auxiliary bearing 7 is fixedly connected with the inner wall of the filter screen 302, the auxiliary bearing 7 can reduce the friction between the rotating rod 305 and the filter screen 302 without affecting the normal rotation of the rotating rod 305, and the rotation smoothness of the rotating rod 305 is improved.

[0027] The outer surface of the rotating rod 305 is fixedly connected with three supporting plates 306, the upper portion of each supporting plate 306 is provided with a rubber scraper 307, the upper surface of each rubber scraper 307 is in contact with the bottom surface of the filter screen 302, the bottom surface of each supporting plate 306 is fixedly connected with a reinforcing rib 8, the inner wall of each reinforcing rib 8 is fixedly connected with the outer surface of the rotating rod 305, and the reinforcing rib 8 can increase the supporting force of the supporting plate 306, so that the supporting plate 306 is not prone to excessive deformation when bearing pressure, and the bearing strength of the supporting plate 306 is improved.

[0028] The bottom surface of each rubber scraper 307 is fixedly connected with three compression springs 308, the bottom end of each compression spring 308 is fixedly connected with the upper surface of the supporting plate 306, the inner portion of each compression spring 308 is provided with a telescopic rod 9, the telescopic end of each telescopic rod 9 is fixedly connected with the bottom surface of the rubber scraper 307, and the bottom surface of each telescopic rod 9 is fixedly connected with the upper surface of the supporting plate 306, so that the telescopic rod 9 can prevent the compression spring 308 from deviating without affecting the smooth telescoping of the compression spring 308, and the use reliability of the compression spring 308 is ensured.

[0029] The inside of the air inlet pipe 301 is provided with a collecting frame 309, the upper surface of the collecting frame 309 is fixedly connected with a conical cover 310, the outer surface of the conical cover 310 is provided with air inlet holes 311 arranged at equal distances, the outer surface of the collecting frame 309 is fixedly connected with a connecting ring 10, the upper surface of the connecting ring 10 is in contact with the bottom surface of the air inlet pipe 301, the inside of the connecting ring 10 is threadedly connected with a plurality of fixing bolts 11, the top end of each fixing bolt 11 penetrates into the inside of the air inlet pipe 301, each fixing bolt 11 is threadedly connected with the air inlet pipe 301, the connecting ring 10 cooperates with the fixing bolts 11 to fix the position of the collecting frame 309, and meanwhile, the collecting frame 309 can be conveniently dismounted by the staff, so that the accumulated dust in the inside of the collecting frame 309 can be cleaned.

[0030] The working principle of the utility model is: in use, first, the external power supply and the controller are connected with the vacuum gauge body 1 and the small servo motor 304 through the interface 2, then the device is fixed on the equipment which needs to be detected on vacuum pressure through the connecting sleeve 4 cooperating with the threaded groove 5, when the air enters the inside of the vacuum gauge body 1 through the air inlet pipe 301, the dust in the air can be primarily filtered through the conical cover 310 and the air inlet hole 311, and the dust can fall downwards and not easily block the air inlet hole 311 through the conical slope of the conical cover 310, when the air contacts the filter screen 302 through the air inlet hole 311, the air can be further filtered, thereby effectively reducing the dust content in the air, enabling the dust to not easily adhere to the diaphragm of the capacitance vacuum gauge when the capacitance vacuum gauge is used, ensuring the detection precision of the pressure value of the capacitance vacuum gauge, and the power provided by the small servo motor 304 cooperates with the fixing frame 303, thereby driving the rotating rod 305 to rotate under the assistance of the auxiliary bearing 7, and further driving the supporting plate 306 and the rubber scraper 307 to rotate through the reinforcing rib 8, at this time, the rubber scraper 307 is always attached to the bottom of the filter screen 302 through the elastic force provided by the compression spring 308, thereby scraping the dust accumulated on the bottom of the filter screen 302 through the rubber scraper 307, preventing the dust from blocking the filter screen 302 and affecting the smooth entry of the gas into the vacuum gauge body 1 for pressure detection, and the scraped dust can fall into the collecting frame 309 for collection through the slope of the conical cover 310, thereby preventing the dust from being scattered to cause secondary pollution, and finally, when the dust in the collecting frame 309 needs to be cleaned, the connecting ring 10 is loosened by rotating the fixing bolt 11, the position of the collecting frame 309 is released, and the collecting frame 309 can be taken out from the air inlet pipe 301.

[0031] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A capacitance vacuum gauge with a dust filter structure, comprising a vacuum gauge body (1), characterized in that: The upper surface of the vacuum gauge body (1) is fixedly connected with an interface (2), and the lower portion of the vacuum gauge body (1) is provided with a filtering mechanism (3). The filtering mechanism (3) comprises an air inlet pipe (301), the top end of the air inlet pipe (301) is fixedly communicated with the air inlet of the vacuum gauge body (1), the inside of the air inlet pipe (301) is fixedly connected with a filter screen (302), the inner wall of the air inlet pipe (301) is fixedly connected with a fixing frame (303), the bottom surface of the fixing frame (303) is fixedly connected with a small servo motor (304), the output end of the small servo motor (304) is fixedly connected with a rotating rod (305), the rotating rod (305) is rotatably connected in the inside of the filter screen (302), the outer surface of the rotating rod (305) is fixedly connected with three supporting plates (306), the upper portion of each supporting plate (306) is provided with a rubber scraper (307), the upper surface of each rubber scraper (307) is in contact with the bottom surface of the filter screen (302), the bottom surface of each rubber scraper (307) is fixedly connected with three compression springs (308), the bottom end of each compression spring (308) is fixedly connected with the upper surface of the supporting plate (306), the inside of the air inlet pipe (301) is provided with a collecting frame (309), the upper surface of the collecting frame (309) is fixedly connected with a conical cover (310), the outer surface of the conical cover (310) is provided with air inlet holes (311) arranged at equal distances.

2. The capacitance vacuum gauge with a dust filter structure according to claim 1, characterized in that: The outer surface of the air inlet pipe (301) is fixedly connected with a connecting sleeve (4), and the outer surface of the connecting sleeve (4) is provided with a threaded groove (5).

3. The capacitance vacuum gauge with a dust filter structure according to claim 1, characterized in that: The upper surface and the bottom surface of the filter screen (302) are fixedly connected with reinforcing rings (6), and the outer surfaces of the two reinforcing rings (6) are fixedly connected with the inner wall of the air inlet pipe (301).

4. The capacitance vacuum gauge with a dust filter structure according to claim 1, characterized in that: The outer surface of the rotating rod (305) is sleeved with an auxiliary bearing (7), and the outer surface of the outer ring of the auxiliary bearing (7) is fixedly connected with the inner wall of the filter screen (302).

5. The capacitance vacuum gauge with a dust filter structure according to claim 1, characterized in that: The bottom surface of each supporting plate (306) is fixedly connected with a reinforcing rib (8), and the inner wall of each reinforcing rib (8) is fixedly connected with the outer surface of the rotating rod (305).

6. The capacitance vacuum gauge with a dust filter structure according to claim 1, characterized in that: The inside of each compression spring (308) is provided with a telescopic rod (9), the telescopic end of each telescopic rod (9) is fixedly connected with the bottom surface of the rubber scraper (307), and the bottom surface of each telescopic rod (9) is fixedly connected with the upper surface of the supporting plate (306).

7. The capacitance vacuum gauge with a dust filter structure according to claim 1, characterized in that: The outer surface of the collecting frame (309) is fixedly connected with a connecting ring (10), the upper surface of the connecting ring (10) is in contact with the bottom surface of the air inlet pipe (301), a plurality of fixed bolts (11) are threadedly connected in the inside of the connecting ring (10), the top end of each fixed bolt (11) penetrates into the inside of the air inlet pipe (301), and each fixed bolt (11) is threadedly connected with the air inlet pipe (301).

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