A trace oxygen transmitter

Abstract

The present application relates to a trace oxygen transmitter, and relates to the field of transmitters. A trace oxygen transmitter includes a mounting seat, an end cover, and a sensor assembly. The mounting seat is tubular, and the sensor assembly is located inside the mounting seat. The end cover is used to close one end of the mounting seat, and a first step groove is provided at the end of the mounting seat away from the end cover. The groove wall of the first step groove is provided with an external thread for connecting to a gas pipeline to be measured. The structural design of the trace oxygen transmitter of the present application is reasonable. The trace oxygen transmitter adopts a tubular mounting seat design, which accommodates the sensor assembly inside and is closed by the end cover on the outside, thereby ensuring the compactness and integrity of the structure. The design of the first step groove and the external thread section facilitates the connection with the gas pipeline to be measured, without the need to additionally connect an oxygen sampling tube, which facilitates the installation of the oxygen transmitter, improves the installation efficiency of the oxygen transmitter, and enhances its practicality and versatility.

Description

Technical Field

[0001] The present application relates to the field of transmitters, and in particular to a trace oxygen transmitter. Background Art

[0002] Oxygen Transmitter is an instrument used to detect the oxygen concentration in the environment and convert it into a standard signal (such as 4-20mA current signal or 0-10V voltage signal) for output. These signals can be received and processed by PLC (Programmable Logic Controller), DCS (Distributed Control System) or other data acquisition systems to provide alarms, control or records when necessary. Trace oxygen transmitters are usually equipped with highly sensitive oxygen sensors that can accurately measure oxygen concentrations as low as a few ppm or even lower.

[0003] In the related technology, oxygen transmitters include electrochemical sensors, paramagnetic sensors, and zirconium oxide sensors. These transmitters have different working principles and applicable scenarios. However, in actual use, when installing the oxygen transmitter, it is necessary to first fix the sample gas sampling tube and the gas pipeline to be tested through a flange, and then connect the oxygen transmitter to the oxygen sampling tube, extract the gas to be tested through the sample gas sampling tube and transport it to the oxygen transmitter for detection.

[0004] When installing the oxygen transmitter in the above technology, the operation is relatively complicated and requires additional connecting pipes, so there are many processes, which makes the installation of the oxygen transmitter more difficult and the installation efficiency is low. Summary of the invention

[0005] In order to facilitate the installation of an oxygen transmitter and improve the installation efficiency of the oxygen transmitter, the present application provides a trace oxygen transmitter.

[0006] The present application provides a trace oxygen transmitter adopts the following technical solution:

[0007] A trace oxygen transmitter comprises a mounting seat, an end cover and a sensor assembly, wherein the mounting seat is tubular, the sensor assembly is located inside the mounting seat, the end cover is used to close one end of the mounting seat, a first stepped groove is provided at the end of the mounting seat away from the end cover, and an external thread for connecting to a gas pipeline to be measured is provided on the groove wall of the first stepped groove.

[0008] Optionally, the sensor assembly includes a PCB mainboard, a fastening circular plate and an oxygen concentration sensor, the oxygen concentration sensor is placed inside a first step groove opened in a mounting seat, the PCB mainboard is axially inserted into the mounting seat, the oxygen concentration sensor is communicatively connected to the PCB mainboard, the fastening circular plate is located at one end of the PCB mainboard away from the oxygen concentration sensor, a plurality of limit columns are fixedly connected to the fastening circular plate, and the end of the PCB mainboard is clamped in the limit column.

[0009] Optionally, the trace oxygen transmitter also includes a filter, and a second step groove is provided at one end of the mounting seat close to the external thread section, and an external thread is provided on the groove wall of the second step groove. The filter is sleeved on the end of the mounting seat and is threadedly connected to the groove wall on the second step groove.

[0010] Optionally, a plurality of blocks are fixedly connected to one end of the end cover close to the mounting seat, a slot is provided on the inner wall of the mounting seat away from the filter, the block is snapped into the slot, and the end cover is detachably connected to the mounting seat via the block and the slot.

[0011] Optionally, a PIN socket and a PIN lead are provided at one end of the mounting seat facing away from the filter, the PIN socket passes through the end cover and is threadedly connected to the end cover, the PIN socket passes through one end of the end cover to tighten the fastening circular plate to the PCB mainboard, the PIN socket is communicatively connected to the PCB mainboard, and the PIN lead interface end is threadedly connected to the PIN socket.

[0012] Optionally, an annular groove is provided on the outer wall of the mounting seat, and the annular groove is used for pasting a nameplate label.

[0013] Optionally, an LED lamp is embedded in the end cover, and the LED lamp is electrically connected to the PCB mainboard.

[0014] Optionally, a rubber sealing gasket is provided on the external thread section of the first step groove of the mounting seat.

[0015] The present application includes at least one of the following beneficial technical effects:

[0016] 1. The structural design of the trace oxygen transmitter of this application is reasonable. The trace oxygen transmitter adopts a tubular mounting seat design, which contains the sensor assembly inside and is closed by the end cover outside, ensuring the compactness and integrity of the structure. The design of the first step groove and the external thread section is convenient for connection with the gas pipeline to be tested, without the need to connect the oxygen sampling tube additionally, which is convenient for installation of the oxygen transmitter, improves the installation efficiency of the oxygen transmitter, and enhances its practicality and versatility.

[0017] 2. The sensor assembly of the present application includes a PCB main board, a fastening circular plate and an oxygen concentration sensor, and the reasonable layout and connection method between them ensure the stability and reliability of the sensor. The oxygen concentration sensor is located in the mounting seat and can directly contact the gas to be measured, thereby improving the accuracy of the measurement.

[0018] 3. The present application provides a second stepped groove and a filter on the mounting base, thereby filtering out impurities and particulate matter in the gas to be measured, protecting the oxygen concentration sensor from damage and extending its service life.

[0019] 4. The LED light embedded in the end cover of the present application is electrically connected to the PCB main board and can be used to indicate the working status of the device or to provide a fault alarm, thereby improving the usability and maintainability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the explosion structure of a trace oxygen transmitter according to an embodiment of the present application;

[0021] Figure 2 It is a cross-sectional view of the overall assembly of a trace oxygen transmitter according to an embodiment of the present application.

[0022] Explanation of the reference numerals: 1. Mounting seat; 11. Annular groove; 12. First step groove; 13. Second step groove; 14. Rubber sealing gasket; 15. Card slot; 16. PIN socket; 17. PIN lead; 2. End cover; 21. Card block; 22. LED lamp; 3. Sensor assembly; 31. Oxygen concentration sensor; 32. PCB main board; 33. Fastening circular plate; 331. Limiting column; 4. Filter. DETAILED DESCRIPTION

[0023] The following is combined with Figure 1-2 This application is described in further detail.

[0024] The present application embodiment discloses a trace oxygen transmitter. Figure 1 A trace oxygen transmitter includes a mounting base 1, an end cover 2, a sensor component 3 and a filter 4.

[0025] Reference Figure 1 and Figure 2 The mounting seat 1 is tubular, and an annular groove 11 is provided on the outer wall of the mounting seat 1. The annular groove 11 is used to stick a nameplate label. A first step groove 12 and a second step groove 13 are sequentially provided at one end of the mounting seat 1. External threads are provided on the groove walls of the first step groove 12 and the second step groove 13. The external threads on the first step groove 12 are used to thread the transmitter with the gas pipeline to be measured. A rubber sealing gasket 14 is sleeved on the external threads on the first step groove 12. The filter 4 is threadedly connected to the mounting seat 1 through the external threads on the second step groove 13.

[0026] Reference Figure 1 and Figure 2 The end cover 2 is located at the end of the mounting base 1 away from the filter 4. The end cover 2 is made of polytetrafluoroethylene plastic. Three L-shaped blocks 21 are integrally connected to one side of the end cover 2. The three blocks 21 are evenly distributed along the circumference of the end cover 2. A card slot 15 is opened on the inner wall of the end of the mounting base 1 away from the filter 4. The card block 21 is connected to the card slot 15. The end cover 2 is detachably connected to the mounting base 1 through the card block 21 and the card slot 15, which facilitates the inspection and disassembly of the transmitter.

[0027] Reference Figure 1 and Figure 2 , the sensor assembly 3 comprises a PCB main board 32, a fastening circular plate 33 and an oxygen concentration sensor 31, wherein the oxygen concentration sensor 31 is placed inside the first stepped groove 12 of the mounting seat 1, the PCB main board 32 is axially inserted into the mounting seat 1, the oxygen concentration sensor 31 and the PCB main board 32 are connected to each other through wires, the fastening circular plate 33 is located at one end of the PCB main board 32 away from the oxygen concentration sensor 31, a plurality of limiting columns 331 are fixedly connected to the fastening circular plate 33, and the end of the PCB main board 32 is clamped in the limiting columns 331. By providing the fastening circular plate 33 and the limiting columns 331, the PCB main board 32 is kept stable in the mounting seat 1, thereby improving the connection stability and working reliability of the oxygen concentration sensor 31 and the PCB main board 32.

[0028] Reference Figure 1 and Figure 2 The end of the mounting base 1 away from the filter 4 is provided with a PIN socket 16 and a PIN lead 17. The PIN socket 16 is arranged through the end cover 2 and is threadedly connected to the end cover 2. The end of the PIN socket 16 passing through the end cover 2 presses the fastening circular plate 33 against the PCB main board 32, so that the fastening circular plate 33 presses the PCB main board 32. The PIN socket 16 is in communication connection with the PCB main board 32, and the interface end of the PIN lead 17 is threadedly connected to the PIN socket 16.

[0029] Reference Figure 1 and Figure 2 The end cover 2 is also embedded with an LED lamp 22, which is electrically connected to the PCB main board 32. The LED lamp 22 is used to indicate the working state of the device or to provide a fault alarm.

[0030] The implementation principle of a trace oxygen transmitter in the embodiment of the present application is as follows: when installing the trace oxygen transmitter, first mark the installation position of the transmitter on the gas pipeline to be tested, then weld a nut matching the external thread on the first stepped groove 12 of the mounting seat 1 to the marked position of the gas pipeline to be tested, then punch a hole at the nut to the gas pipeline to be tested, and then thread the external thread on the first stepped groove 12 of the mounting seat 1 with the nut, and the transmitter and the gas pipeline to be tested can be ensured to maintain good air tightness through the rubber sealing gasket 14. When the transmitter is working, the filter 4 is used to filter impurities and particulate matter in the gas to be tested, protect the oxygen concentration sensor 31 from damage, and extend its service life and detection accuracy. The oxygen concentration sensor 31 is placed inside the mounting seat 1 and can directly contact the gas to be tested, thereby measuring the concentration of oxygen. The PCB main board 32 is connected to the oxygen concentration sensor 31 through a wire to receive and process the signal of the oxygen concentration sensor 31. The fastening circular plate 33 and the limit column 331 ensure that the PCB main board 32 remains stable in the mounting seat 1, improving the stability of the connection and the working reliability.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A trace oxygen transmitter, characterized in that: The invention comprises a mounting seat (1), an end cover (2) and a sensor assembly (3); the mounting seat (1) is tubular, the sensor assembly (3) is located inside the mounting seat (1), the end cover (2) is used to close one end of the mounting seat (1), and the end of the mounting seat (1) away from the end cover (2) is provided with a first stepped groove (12), and the groove wall of the first stepped groove (12) is provided with an external thread for connecting to a gas pipeline to be measured.

2. A trace oxygen transmitter according to claim 1, characterized in that: The sensor assembly (3) comprises a PCB main board (32), a fastening circular plate (33) and an oxygen concentration sensor (31); the oxygen concentration sensor (31) is placed inside a first stepped groove (12) provided in a mounting seat (1); the PCB main board (32) is inserted into the mounting seat (1) along the axial direction; the oxygen concentration sensor (31) is communicatively connected to the PCB main board (32); the fastening circular plate (33) is located at one end of the PCB main board (32) away from the oxygen concentration sensor (31); a plurality of limiting columns (331) are fixedly connected to the fastening circular plate (33); and the ends of the PCB main board (32) are clamped in the limiting columns (331).

3. A trace oxygen transmitter according to claim 1, characterized in that: The trace oxygen transmitter also includes a filter (4); an end of the mounting seat (1) close to the external thread section is also provided with a second stepped groove (13); a groove wall of the second stepped groove (13) is provided with an external thread; the filter (4) is sleeved on the end of the mounting seat (1) and is threadedly connected to the groove wall of the second stepped groove (13).

4. A trace oxygen transmitter according to claim 1, characterized in that: A plurality of clamping blocks (21) are fixedly connected to one end of the end cover (2) close to the mounting seat (1); a clamping groove (15) is provided on the inner wall of the mounting seat (1) at the end facing away from the filter (4); the clamping blocks (21) are clamped in the clamping groove (15); and the end cover (2) is detachably connected to the mounting seat (1) via the clamping blocks (21) and the clamping groove (15).

5. A trace oxygen transmitter according to claim 2, characterized in that: A PIN socket (16) and a PIN lead (17) are provided at one end of the mounting seat (1) facing away from the filter (4); the PIN socket (16) is arranged to penetrate the end cover (2) and is threadedly connected to the end cover (2); one end of the PIN socket (16) passes through the end cover (2) to press the fastening circular plate (33) against the PCB main board (32); the PIN socket (16) is communicatively connected to the PCB main board (32); and an interface end of the PIN lead (17) is threadedly connected to the PIN socket (16).

6. A trace oxygen transmitter according to claim 1, characterized in that: An annular recessed groove (11) is provided on the outer wall of the mounting seat (1), and the annular recessed groove (11) is used for pasting a nameplate label.

7. A trace oxygen transmitter according to claim 2, characterized in that: An LED lamp (22) is also embedded in the end cover (2), and the LED lamp (22) is electrically connected to the PCB main board (32).

8. A trace oxygen transmitter according to claim 1, characterized in that: The mounting seat (1) is provided with a rubber sealing pad (14) on the external thread section of the first stepped groove (12).

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