A gas ultrasonic sensor with anti-interference function

Abstract

The utility model discloses a kind of gas ultrasonic sensor with anti-interference function, it includes tubular shell and be arranged in ultrasonic cavity in shell, the ultrasonic cavity is inclined and penetrates the shell, and the both ends of ultrasonic cavity respectively exceed the outside of shell, and the both ends of ultrasonic cavity are respectively equipped with ultrasonic wave transmitting end and ultrasonic wave receiving end;Circular filter portion is equipped in the shell of ultrasonic cavity front end, the filter portion uses filter cloth or porous adsorption material;The both ends of shell are equipped with connector respectively.It is mainly aimed at the application scene of the composition of gas is analyzed, filter device is set in sensor, the particulate impurities in gas are filtered, and then the anti-interference capability of sensor is promoted, and the precision of measurement is promoted.

Description

Technical Field

[0001] This utility model relates to the field of sensor technology, specifically a gas ultrasonic sensor with anti-interference function. Background Technology

[0002] An ultrasonic sensor is a sensor that converts ultrasonic signals into electrical signals. It has the characteristics of high frequency, short wavelength, and small diffraction. In particular, it has good directionality and can propagate in a directional manner as a ray. It has a great ability to penetrate solids and liquids, especially in solids that are opaque to sunlight.

[0003] Ultrasonic sensors are also widely used in gas applications. They utilize the propagation speed and time difference of ultrasound waves in gas to obtain information, mainly for measuring gas flow rate, velocity, and composition. When measuring the composition of a gas, ultrasound is relatively accurate when the gas is free of impurities. However, when impurity particles are present in the gas, the propagation of ultrasound waves in the air is affected by these particles, thus affecting the measurement of its composition. Summary of the Invention

[0004] This invention relates to a gas ultrasonic sensor with anti-interference function. It is mainly designed for applications that analyze the composition of gases. A filter device is installed in the sensor to filter particulate impurities in the gas, thereby improving the sensor's anti-interference ability and enhancing the accuracy of the measurement.

[0005] The present invention adopts the following technical solution:

[0006] An anti-interference gas ultrasonic sensor includes a tubular housing and an ultrasonic cavity disposed within the housing. The ultrasonic cavity obliquely penetrates the housing, with both ends of the ultrasonic cavity extending beyond the outside of the housing. An ultrasonic transmitter and an ultrasonic receiver are respectively installed at the two ends of the ultrasonic cavity. A circular filter section is provided inside the housing at the front end of the ultrasonic cavity. The filter section is made of filter cloth or porous adsorption material. Connectors are provided at both ends of the housing.

[0007] Furthermore, the filter unit has a rotating structure inside the housing, with both ends of the filter unit mounted on the housing via rotating shafts, and the rotating shafts extending outward from the outside of the housing. A knob is provided at the end of the rotating shaft.

[0008] The housing is equipped with a movable sealing ring located behind the filter section. When the filter section rotates, the sealing ring moves to the rear half and moves away from the filter section. After the filter section has rotated, the sealing ring is pressed against the rear of the filter section to support and seal the filter section.

[0009] The sealing ring is provided with a bracket at the rear to support it. The bracket has a ring structure and two symmetrical ear plates at the rear of the bracket. The tail of the ear plates is provided with a drive rod that runs through the front and rear. The drive rod drives the ear plates and the bracket, thereby driving the sealing ring to move back and forth.

[0010] The housing has a transverse strip-shaped sliding hole at a position corresponding to the drive rod. The drive rod passes through the sliding hole from front to back. The housing has a tubular drive part on the outside. The inner wall of the drive part has a drive groove corresponding to the drive rod. The drive groove has an arc-shaped structure. The two ends of the drive rod are inserted into the drive groove. The drive part rotates and drives the drive rod to slide in the drive groove. Under the limitation of the sliding hole, the drive rod slides back and forth in the sliding hole.

[0011] Furthermore, the housing is provided with a notch, and a middle section is provided inside the notch. The middle section corresponds to the housing and is inserted into the notch. The sliding hole is provided on the middle section. Mounting rings are provided on both sides of the housing. An accordion-shaped silicone ring is provided on the inner wall of the middle section. The two ends of the middle section are respectively mounted on the mounting rings on both sides of the notch. The silicone ring and the housing form a through gas flow channel.

[0012] Furthermore, the two ends of the intermediate section are respectively provided with uniformly distributed limiting grooves, and the shells on both sides of the notch are provided with limiting teeth corresponding to the limiting grooves. When the intermediate section is installed in the notch, the intermediate section and the shell do not rotate relative to each other through the cooperation of the limiting teeth and the limiting grooves.

[0013] The outer edges of the shell on both sides of the notch are provided with annular retaining rings; the drive unit is formed by two semi-circular arc plates that are joined together and connected to each other by bolts; the inner walls of both ends of the drive unit are provided with retaining grooves at positions corresponding to the retaining rings.

[0014] The present invention, by adopting the above-described technical solution, has the following beneficial effects:

[0015] In use, this device filters the gas through the filter section before it is used for ultrasonic measurement. When measuring the gas content, the filter section can minimize the influence of particulate impurities on the measurement results. In addition, the rotatable filter section structure of this device can be flipped after long-term use to allow the gas to backwash the filter section and avoid clogging.

[0016] In addition, the filter section of this device can also be rotated to a vertical position in actual use, without filtering the gas. At this time, the ultrasonic waves can directly measure the gas flowing through the housing. This operation can be used to measure the gas velocity and flow rate information. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the present invention.

[0018] Figure 2 This is a cross-sectional view of the present invention.

[0019] Figure 3 This is a schematic diagram showing the disassembled parts of this utility model.

[0020] Figure 4 This is a schematic diagram of the middle section. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments. It should be understood that the following embodiments are only one or more manifestations of the present invention and are not a complete limitation on the invention content recorded in this application. Any improvements made based on the invention content or technical solution recorded in this application that are known to those skilled in the art should fall within the scope of protection claimed in this application.

[0022] Furthermore, the descriptions of directions such as up, down, left, right, front, and back presented in the specific embodiments are merely for the purpose of describing the technical solutions and are not absolute limitations unless otherwise stated.

[0023] like Figures 1-4 The gas ultrasonic sensor shown includes a tubular housing 1 and an ultrasonic cavity 2 disposed within the housing 1. The ultrasonic cavity 2 obliquely penetrates the housing 1, with both ends of the ultrasonic cavity 2 extending beyond the exterior of the housing 1. An ultrasonic transmitter 201 and an ultrasonic receiver 202 are respectively installed at the two ends of the ultrasonic cavity 2. A circular filter section 3 is provided inside the housing 1 at the front end of the ultrasonic cavity 2. The filter section 3 is made of filter cloth or porous adsorption material. Connectors 4 are provided at both ends of the housing 1.

[0024] Furthermore, the filter section 3 is a rotating structure inside the housing 1. Both ends of the filter section 3 are respectively mounted on the housing 1 via rotating shafts 301, and the outer side of the rotating shafts 301 extends out of the housing 1. A knob 302 is provided at the end of the rotating shafts 301.

[0025] The housing 1 is provided with a movable sealing ring 101. The sealing ring 101 is located behind the filter section 3. When the filter section 3 rotates, the sealing ring 101 moves to the rear half and moves away from the filter section 3. After the filter section 3 has rotated, the sealing ring 101 moves forward and fits tightly to the rear of the filter section 3 to support and seal the filter section 3.

[0026] The sealing ring 101 is provided with a bracket 102 at the rear to support it. The bracket 102 has a ring structure and two ear plates 103 symmetrically arranged at the rear of the bracket 102. The tail of the ear plate 103 is provided with a drive rod 104 that runs through it from front to back. The drive rod 104 drives the ear plate 103 and the bracket 102, thereby driving the sealing ring 101 to move back and forth.

[0027] The housing 1 has a transverse strip-shaped sliding hole 105 at a position corresponding to the drive rod 104. The drive rod 104 passes through the sliding hole 105. The housing 1 has a tubular drive part 106 on its outside. The inner wall of the drive part 106 has a drive groove 107 corresponding to the drive rod 104. The drive groove 107 has an arc-shaped structure. Both ends of the drive rod 104 are inserted into the drive groove 107. The drive part 106 rotates to drive the drive rod 104 to slide in the drive groove 107. Under the limitation of the sliding hole 105, the drive rod 104 slides back and forth in the sliding hole 105.

[0028] Furthermore, the housing 1 is provided with a notch 108, and a middle section 109 is provided inside the notch 108. The middle section 109 corresponds to the housing 1 and is inserted into the notch 108. The sliding hole 105 is provided on the middle section 109. Mounting rings 110 are provided on the housing 1 on both sides of the notch 108. An accordion-shaped silicone ring 111 is provided on the inner wall of the middle section 109. The two ends of the middle section 109 are respectively mounted on the mounting rings 110 on both sides of the notch 108. The silicone ring 111 and the housing 1 form a through gas flow channel.

[0029] Furthermore, the two ends of the intermediate section 109 are respectively provided with uniformly distributed limiting grooves 112, and the housing 1 on both sides of the notch 108 is provided with limiting teeth 113 corresponding to the limiting grooves 112. When the intermediate section 109 is installed in the notch 108, the intermediate section 109 and the housing 1 do not rotate relative to each other through the cooperation of the limiting teeth 113 and the limiting grooves 112.

[0030] The outer edges of the housing 1 on both sides of the notch 108 are provided with annular retaining rings 114; the drive part 106 is formed by two semi-circular arc plates that are joined together and connected to each other by bolts; the inner walls of both ends of the drive part 106 are provided with retaining grooves 115 corresponding to the retaining rings 114.

[0031] This device is installed in a gas pipeline and connected via connectors on both sides. During normal measurement, the sealing ring is pressed against the rear of the filter section for support and sealing. After a period of use, the filter section needs to be backwashed. Rotating the drive unit causes the drive rod to slide backward in the sliding hole under the drive groove, causing the ear plate, support plate, and end sealing ring to slide backward and lose support for the filter section. At this time, rotating the knob causes the filter section to flip. After flipping, rotating the drive unit in the opposite direction causes the sealing ring to move to the front to support and seal the rear of the filter section.

[0032] In practical use, the filter section can be rotated to a horizontal position. In this case, the filter section does not filter the gas, which makes it easier for the ultrasonic transmitter and receiver to measure the gas flow rate and velocity.

Claims

1. A gas ultrasonic sensor having an anti-interference function, characterized by: It includes a tubular shell and a ultrasonic cavity arranged in the shell, the ultrasonic cavity is inclined through the shell, the two ends of the ultrasonic cavity respectively exceed the outside of the shell, and the two ends of the ultrasonic cavity are respectively provided with an ultrasonic emission end and an ultrasonic receiving end; a circular filter is arranged in the shell at the front end of the ultrasonic cavity, the filter is made of filter cloth or porous adsorption material; the two ends of the shell are respectively provided with a connecting head.

2. The gas ultrasonic sensor with anti-interference function according to claim 1, characterized in that: The filter is in a rotating structure in the shell, the two ends of the filter are respectively mounted on the shell through rotating shafts, and the rotating shafts extend out of the shell outside; a knob is arranged at the end of the rotating shaft.

3. The gas ultrasonic sensor with anti-interference function according to claim 2, characterized in that: A movable sealing ring is arranged in the shell, the sealing ring is arranged behind the filter, when the filter rotates, the sealing ring moves to the rear half and moves away from the filter, after the rotation of the filter is completed, the sealing ring is tightly attached to the rear of the filter to support and seal the filter.

4. The gas ultrasonic sensor with anti-interference function according to claim 3, characterized in that: A bracket is arranged behind the sealing ring to support the sealing ring, the bracket is in a ring structure, and two ear plates symmetrically arranged in front and back are arranged at the rear of the bracket, a driving rod penetrating front and back is arranged at the tail of the ear plate, the driving rod drives the ear plate and the bracket to drive the front and back movement of the sealing ring.

5. The gas ultrasonic sensor with anti-interference function according to claim 4, characterized in that: A transverse strip-shaped sliding hole is arranged on the shell corresponding to the driving rod, the driving rod penetrates the sliding hole, a tubular driving part is arranged outside the shell, a driving groove corresponding to the driving rod is arranged on the inner wall of the driving part, the driving groove is in an arc structure, the two ends of the driving rod are inserted into the driving groove, the driving part drives the driving rod to slide in the driving groove, under the limitation of the sliding hole, the driving rod slides in the sliding hole.

6. The gas ultrasonic sensor with anti-interference function according to claim 5, characterized in that: A notch is arranged on the shell, a middle section is arranged in the notch, the middle section corresponds to the shell and is inserted into the notch, the sliding hole is arranged on the middle section; two mounting rings are arranged on the shell on both sides of the notch, a piano-shaped silica gel ring is arranged on the inner wall of the middle section, the two ends of the middle section are respectively mounted on the mounting rings on both sides of the notch, and the silica gel ring forms a penetrating gas flow channel with the shell.

7. The gas ultrasonic sensor with anti-interference function according to claim 6, characterized in that: Uniformly distributed limiting grooves are arranged at the two ends of the middle section, limiting teeth corresponding to the limiting grooves are arranged on the shell on both sides of the notch, when the middle section is mounted in the notch, the middle section and the shell do not rotate relative to each other through the cooperation of the limiting teeth and the limiting grooves.

8. The gas ultrasonic sensor with anti-interference function according to claim 7, characterized in that: The outer edge of the shell on both sides of the notch is provided with a ring-shaped clasp; the driving part is formed by two semicircular arc plates abutting each other, the arc plates are connected to each other by bolts; a clamping groove is arranged on the inner wall of the two ends of the driving part corresponding to the clasp.

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