Multichannel fluid on-line analyzer

Abstract

A kind of multichannel fluid online analyzer, wherein, sample introduction device is used to send sample to be detected into sample testing device;Sample testing device is provided with more than one passage capable of being passed through by sample, for making sample pass through, and cooperating X-ray generating device to detect sample when sample passes through;X-ray generating device is used to generate X-ray, and X-ray is emitted into sample testing device;Detection device is used to receive the radiation light line of sample in sample testing device, detection device and X-ray generating device are relatively arranged, and detection device can receive the light line of radiation of sample to be detected illuminated by X-ray generating device;Sample switching device is used to drive X-ray generating device and detection device to move, so that it is switched between the passages of different sample testing devices.The X-ray generating device of the present application can control the X-ray emission direction by rotatable structure, so that accurate detection passage switching can be carried out.

Description

Technical Field

[0001] This invention discloses an analytical instrument, particularly a multi-channel online fluid analyzer, belonging to the field of spectroscopic analysis instrument technology. Background Technology

[0002] A multichannel online fluid analyzer is a device used for real-time monitoring and analysis of multiple components or parameters in fluids (such as water and air). Based on X-ray and fluorescence spectroscopy, a multichannel online fluid analyzer is an advanced analytical instrument that utilizes X-ray fluorescence spectroscopy technology to monitor multiple components in the fluid in real time.

[0003] Its basic principle is to use X-ray fluorescence spectroscopy and fluorescence reaction to analyze various elements in fluid samples. X-rays are used to excite atoms in the sample and produce fluorescence radiation. The fluorescence radiation of different elements has specific energies. By detecting these energies, the types and concentrations of elements present in the fluid can be determined. Multichannel online fluid analyzers have wide applications in many fields, including but not limited to mineral exploration, metal smelting, environmental monitoring, food safety, and pharmaceutical manufacturing. They can help monitor and control various elements in fluids, ensure product quality, reduce environmental pollution, and improve production efficiency.

[0004] Existing multi-channel online fluid analyzers typically have a large number of detection channels, making the switching process complex and resulting in low efficiency. Summary of the Invention

[0005] To address the aforementioned drawback of complex channel switching processes in existing multi-channel online fluid analyzers, this invention provides a multi-channel online fluid analyzer that can precisely switch detection channels using a rotatable X-ray generator.

[0006] The technical solution adopted by this invention to solve its technical problem is as follows: a multi-channel online fluid analyzer, comprising a sample introduction device, a sample testing device, an X-ray generator, a detection device, and a sample switching device. The sample introduction device is used to deliver the sample to be tested into the sample testing device. The sample testing device is provided with one or more channels for sample passage, allowing the sample to pass through, and simultaneously detecting the sample in conjunction with the X-ray generator. The X-ray generator generates X-rays and emits them into the sample testing device. The detection device receives the radiation emitted by the sample within the sample testing device; the detection device and the X-ray generator are arranged opposite each other, and the detection device can receive the radiation emitted by the sample irradiated by the X-ray generator. The sample switching device drives the X-ray generator and the detection device to switch between different channels of the sample testing device.

[0007] The technical solution adopted by the present invention to solve its technical problem further includes:

[0008] The sample testing device, X-ray generating device, detection device, and sample switching device constitute the main unit. The sample injection device adopts a pump station, which includes a pump station frame, a fluid pump, and a pump station control valve. The fluid pump is installed on the pump station frame, and there is one or more fluid pumps. The pump station control valve is installed on the pump station frame and is connected to the fluid pump through a pipeline. There is one or more pump station control valves.

[0009] The fluid pump includes a pump body motor, a squeeze roller, a hose fixing frame, a limit frame, and a support plate. The pump body motor and the squeeze roller are installed together. The pump body motor is mounted on the support plate. The squeeze roller includes two or more squeeze rods distributed along the circumference. The hose fixing frame and the limit frame are respectively mounted on the support plate. The hose fixing frame has an arc shape inside, and its arc shape is adapted to the outer diameter of the squeeze roller. The limit frame and the hose fixing frame are set accordingly.

[0010] The support plate is fixedly mounted on the hose guide frame, which is located on the opposite side of the hose fixing frame. Casters are installed at the bottom of the pump station frame, and fixed support feet are installed at the bottom of the pump station frame, with the fixed support feet positioned corresponding to the caster positions.

[0011] The X-ray generating device includes a high-voltage power supply, an X-ray tube, and a high-voltage wire. The high-voltage power supply and the X-ray tube are arranged side by side and connected by a high-voltage wire. The detection device uses a detector that matches the X-ray. A sample positioning device is fixedly installed at the intersection of the X-ray tube and the detector. The sample positioning device is set corresponding to the sample testing unit.

[0012] A filter switching device is provided between the X-ray tube and the sample positioning device. The filter switching device includes a light control box, a switching motor, a cover plate, a filter disc, a filter, and a belt. The cover plate is fixedly installed on the light control box to form the outer shell of the filter switching device. The filter disc is installed inside the light control box, and one or more filters are installed on the filter disc. The switching motor is fixedly installed on the light control box. The filter disc is connected to the switching motor through the belt. The switching motor drives the filter disc to rotate through the belt. The filter switching device is set to correspond to the light outlet on the X-ray tube. The detector is fixedly installed on the cover plate.

[0013] A first sealing ring is provided between the cover plate and the optical control box. The first sealing ring can isolate the inside of the optical control box from the external gas, and the external acid and alkali corrosive environment will not affect the inside of the optical control box, thereby improving the reliability of the system.

[0014] The sample testing device is fixedly installed on the main frame. The sample testing device includes one or more sample testing units arranged side by side. The sample testing units are distributed in an arc shape, and the center of the arc is the axis of the rotating part of the sample switching device. A shield is provided behind the sample testing unit.

[0015] The sample testing unit includes a shell, a cover plate, a light-transmitting plate, and a sealing ring. A fluid cavity is provided inside the shell. The cover plate is fixedly installed on the shell. The light-transmitting plate is located between the shell and the cover plate. A light-transmitting hole is opened on the cover plate, allowing X-rays emitted by the X-ray tube to pass through the light-transmitting plate and irradiate the interior of the sample testing unit. A sealing ring is provided between the light-transmitting plate and the shell. A liquid inlet port and a liquid outlet port are installed on the shell. A liquid inlet sealing ring is provided between the liquid inlet port and the shell, and a liquid outlet sealing ring is provided between the liquid outlet port and the shell.

[0016] The sample switching device includes a drive motor, a drive wheel, a synchronous wheel, a rotating shaft, an upper support plate, and a lower support plate. The rotating shaft is fixedly mounted on the upper and lower support plates, the synchronous wheel is fixedly mounted on the rotating shaft, the drive motor is fixedly mounted on the main frame, the drive wheel is fixedly mounted on the rotor of the drive motor, and a synchronous belt is connected between the drive wheel and the synchronous wheel. The axis of the rotating shaft is the rotating axis of the sample switching device. The high-voltage power supply and the X-ray tube are fixedly mounted on the upper and lower support plates, respectively.

[0017] A motor controller is fixedly installed on the side of the drive motor. The drive motor is mounted on a motor mounting plate. The motor mounting plate is fixedly mounted on the main frame by a support column. A switching bracket is fixedly installed on the motor mounting plate, and the switching bracket is set at the top of the rotating shaft.

[0018] The beneficial effects of this invention are: by using a rotatable X-ray generator, the direction of X-ray emission can be controlled, thereby enabling precise switching of detection channels.

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0021] Figure 2 This is a three-dimensional structural schematic diagram of the present invention from another perspective.

[0022] Figure 3 This is a top view of the pump station structure of the present invention.

[0023] Figure 4 This is a schematic diagram of the pump stand structure of the present invention.

[0024] Figure 5 This is a schematic diagram of the external pipeline structure of the present invention.

[0025] Figure 6 This is a front view structural diagram of the core part of the present invention.

[0026] Figure 7 This is a top view of the core structure of the present invention.

[0027] Figure 8 This is a three-dimensional structural diagram of the core part of the present invention.

[0028] Figure 9 This is a three-dimensional structural diagram of the core part of the present invention from another perspective.

[0029] Figure 10 This is a three-dimensional structural diagram of the sample switching device of the present invention.

[0030] Figure 11 This is a partial exploded view of the sample switching device of the present invention.

[0031] Figure 12 This is a three-dimensional structural diagram of the sample testing device of the present invention.

[0032] Figure 13 This is a partial exploded structural diagram of the sample testing device of the present invention.

[0033] Figure 14 This is a schematic diagram of the three-dimensional structure of the peristaltic pump of the present invention.

[0034] Figure 15 This is a schematic diagram of the peristaltic pump of the present invention in its disassembled state.

[0035] In the diagram, 1-Main unit, 11-High voltage power supply, 12-X-ray tube, 13-High voltage line, 14-Synchronous pulley, 15-Rotating shaft, 16-Detector, 17-Control board box, 18-Sample testing device, 181-Outer shell, 182-Cover plate, 183-Liquid inlet port, 184-Liquid outlet port, 185-Liquid inlet sealing ring, 186-Liquid outlet sealing ring, 187-Transparent plate, 188-Sealing ring, 19-Shielding cover, 110-Drive motor, 111-Drive pulley, 112-Synchronous belt, 113-Motor controller, 114-Switching bracket, 115-Upper support plate, 11 6-Lower support plate, 117-Light outlet, 118-Light control box, 119-Switching motor, 120-Filter disc, 121-Belt, 122-First sealing ring, 123-Cover plate, 124-Sample positioning device, 2-Pump station, 21-Peristaltic pump, 211-Pump body motor, 212-Squeezing roller, 213-Hose fixing bracket, 214-Limit bracket, 215-Hose guide bracket, 216-Support plate, 22-Pump station control valve, 23-Pump station frame, 24-Cast wheel, 25-Fixed support foot, 3-External piping system, 31-Wall, 32-Pipeline, 33-External control valve. Detailed Implementation

[0036] This embodiment is a preferred embodiment of the present invention. All other embodiments that are the same as or similar to this embodiment in principle and basic structure are within the protection scope of the present invention.

[0037] Please refer to the appendix for details. Figure 1 To be continued Figure 15 This invention primarily protects a multi-channel online fluid analyzer, which includes a sample introduction device, a sample testing device, an X-ray generator, a detection device, and a sample switching device, wherein...

[0038] The sample introduction device is used to deliver the sample to be tested into the sample testing device;

[0039] The sample testing device is equipped with one or more channels for the sample to pass through, and an X-ray generator is used to detect the sample as it passes through.

[0040] The X-ray generator is used to generate X-rays and emit them into the sample testing device.

[0041] The detection device is used to receive the radiation emitted by the sample in the sample testing device. The detection device and the X-ray generator are set opposite each other, and the detection device can just receive the radiation emitted by the sample to be tested by the X-ray generator.

[0042] The sample switching device is used to drive the movement of the X-ray generator and detector, allowing them to switch between channels of different sample testing devices.

[0043] In this embodiment, the sample introduction device is a pump station 2, and the main unit 1 consists of a sample testing device, an X-ray generating device, a detection device, and a sample switching device. The pump station 2 mainly includes a pump station frame 23, a fluid pump (in this embodiment, a peristaltic pump 21 is used; however, other fluid pump structures can be selected in specific implementations), and pump station control valves 22. The pump station frame 23 is the main supporting structure of the pump station 2. The peristaltic pump 21 is installed on the pump station frame 23. There is one or more peristaltic pumps 21; the specific number is determined according to actual needs. In this embodiment, four peristaltic pumps 21 are provided. The pump station control valves 22 are installed on the pump station frame 23 and are connected to the peristaltic pumps 21 through pipelines. There is one or more pump station control valves 22; the specific number is determined according to actual needs. In this embodiment, sixteen pump station control valves 22 are provided, each used to control one of the sixteen samples to be tested.

[0044] In this embodiment, the peristaltic pump 21 mainly includes a pump body motor 211, a squeezing roller 212, a hose fixing frame 213, a limiting frame 214, and a support plate 216. The pump body motor 211 and the squeezing roller 212 are installed together, and the pump body motor 211 can drive the squeezing roller 212 to rotate. The pump body motor 211 is mounted on the support plate 216 through a support rod. The squeezing roller 212 is composed of two or more squeezing rods distributed along the circumference. The squeezing rods can squeeze the hose in turn, pushing the fluid sample in the hose forward. The hose fixing bracket 213 and the limiting bracket 214 are respectively mounted on the support plate 216. The hose fixing bracket 213 has an arc-shaped interior, and its arc shape is adapted to the outer diameter of the extrusion roller 212, so that the hose can be precisely limited by the hose fixing bracket 213 and the hose can be extruded by the extrusion roller 212. The limiting bracket 214 is correspondingly set to the hose fixing bracket 213, and can limit the hose fixing bracket 213 to prevent the hose from coming out of the hose fixing bracket 213 during operation. In this embodiment, the hose fixing bracket 213 is provided with four layers, which can transport fluid samples from four hoses. In specific implementation, it can also be set according to actual needs.

[0045] In this embodiment, a hose guide frame 215 is fixedly installed on the support plate 216. The hose guide frame 215 is located on the opposite side of the hose fixing frame 213 and can guide the hose.

[0046] In this embodiment, the bottom of the pump station frame 23 is equipped with casters 24, which can be used to easily push the pump station 2 to the desired position. The bottom of the pump station frame 23 is equipped with fixed support feet 25, which are set at the positions of the casters 24. When the pump station 2 is pushed to the desired position, the fixed support feet 25 can support the column pump station 2 and prevent it from moving back and forth during use.

[0047] In this embodiment, the X-ray generating device includes a high-voltage power supply 11, an X-ray tube 12, and a high-voltage wire 13. The high-voltage power supply 11 and the X-ray tube 12 are arranged side by side and connected by the high-voltage wire 13, making their spatial layout more rational. The technology of generating X-rays using high-voltage electricity is existing technology, and this invention does not improve its internal structure or principle. The high-voltage power supply 11 and the X-ray tube 12 can be selected from existing technologies suitable for this invention.

[0048] The detection device uses an X-ray detector 16, which is already existing technology. This invention does not make any improvements to its internal structure or principle. The detector 16 can be any existing technology that is suitable for this invention.

[0049] In this embodiment, a sample positioning device 124 is fixedly installed at the intersection of the X-ray tube 12 and the detector 16. The sample positioning device 124 is set in accordance with the sample testing unit. The intersection of the X-ray tube 12 and the detector 16 is defined as the sample point, and the sample point is located at the sample positioning device 124.

[0050] In this embodiment, a filter switching device is provided between the X-ray tube 12 and the sample positioning device 124. The filter switching device includes a light control box 118, a switching motor 119, a cover plate 123, a filter disc 120, filters, and a belt 121. The cover plate 123 is fixedly installed on the light control box 118, forming the outer shell of the filter switching device. The filter disc 120 is installed inside the light control box 118, and one or more filters are installed on the filter disc 120. The switching motor 119 is fixedly installed on the light control box 118. The filter disc 120 is connected to the switching motor 119 via the belt 121. The switching motor 119 drives the filter disc 120 to rotate via the belt 121 to achieve switching between filters. In this embodiment, a first sealing ring 122 is provided between the cover plate 123 and the light control box 118, which can isolate the inside of the light control box 118 from the external gas. External corrosive environments such as acids and alkalis will not affect the inside of the light control box 118, thereby improving the reliability of the system.

[0051] In this embodiment, the filter switching device is set corresponding to the light outlet 117 on the X-ray tube 12, so that the light emitted from the X-ray tube 12 can be filtered by a suitable filter 120 before sample detection. The detector 16 is fixedly mounted on the cover plate 123.

[0052] In this embodiment, the sample testing device is fixedly mounted on the main frame. The sample testing device includes one or more sample testing units arranged side by side. The sample testing units are distributed in an arc shape, and the center of the arc is the axis of the rotating part of the sample switching device. A shielding cover 19 is provided behind the sample testing unit to block and shield excess X-rays emitted by the X-ray tube 12.

[0053] In this embodiment, the sample testing unit includes a housing 181, a cover plate 182, a light-transmitting plate 187, and a sealing ring 188. A fluid cavity is provided inside the housing 181. The cover plate 182 is fixedly installed on the housing 181. The light-transmitting plate 187 is disposed between the housing 181 and the cover plate 182. A light-transmitting hole is provided on the cover plate 182, allowing X-rays emitted from the X-ray tube 12 to pass through the light-transmitting plate 187 and irradiate the interior of the sample testing unit. A sealing ring 188 is provided between the light-transmitting plate 187 and the housing 181 to achieve waterproofing. In this embodiment, the housing 181 is equipped with a liquid inlet 183 and a liquid outlet 184. A liquid inlet sealing ring 185 is provided between the liquid inlet 183 and the housing 181, and a liquid outlet sealing ring 186 is provided between the liquid outlet 184 and the housing 181.

[0054] In this embodiment, the sample switching device includes a drive motor 110, a drive wheel 111, a synchronous wheel 14, a rotating shaft 15, an upper support plate 115, and a lower support plate 116. The rotating shaft 15 is fixedly mounted on the upper support plate 115 and the lower support plate 116. The synchronous wheel 14 is fixedly mounted on the rotating shaft 15. The drive motor 110 is fixedly mounted on the main frame. The drive wheel 111 is fixedly mounted on the rotor of the drive motor 110. A synchronous belt 112 is connected between the drive wheel 111 and the synchronous wheel 14. The drive wheel 111 drives the synchronous wheel 14 to rotate through the synchronous belt 112. The synchronous wheel 14 drives the rotating shaft 15 to rotate. The axis of the rotating shaft 15 is the rotating axis of the sample switching device. The high-voltage power supply 11 and the X-ray tube 12 are fixedly mounted on the upper support plate 115 and the lower support plate 116, respectively. When the rotating shaft 15 rotates, it will drive the upper support plate 115 and the lower support plate 116 to rotate together. The upper support plate 115 and the lower support plate 116 drive the high-voltage power supply 11 and the X-ray tube 12 to rotate synchronously, so that the light outlet 117 of the X-ray tube 12 can switch between different sample testing units.

[0055] In this embodiment, a motor controller 113 is fixedly installed on the side of the drive motor 110 to control the operation of the drive motor 110. The drive motor 110 is mounted on a motor mounting plate (not shown in the figure). The motor mounting plate is fixedly mounted on the main frame by a support column. A switching bracket 114 is fixedly installed on the motor mounting plate. The switching bracket 114 is set corresponding to the top of the rotating shaft 15 and can limit the top of the rotating shaft 15 to make its operation more stable and smooth.

[0056] In this invention, the light control box 118, control board box 17, and other components are specially designed with airtightness to isolate the internal accessories, circuit boards, electronic components, etc., from the external atmosphere. Structural parts and components are also mostly processed using corrosion-resistant resin materials such as PEEK to enable this invention to operate in corrosive gas environments. In actual manufacturing, the main unit chassis, pump station box, etc., are made of stainless steel plates, and casters and other accessories are specially sourced from corrosion-resistant and robust stainless steel to ensure the invention can operate in corrosive gas environments.

[0057] When in use, this invention is used in conjunction with an external piping system 3, which includes a wall 31, a pipe 32, and an external control valve 33. The pipe 32 and the external control valve 33 are installed on the wall 31. The external control valve 33 is connected to the pipe 32 to control the opening and closing of the pipe 32. The pipe 32 is connected to the pump station 2 through a flexible hose.

[0058] This invention utilizes a rotatable X-ray generator to control the direction of X-ray emission, thereby enabling precise switching of detection channels.

Claims

1. A multi-channel fluid on-line analyzer characterized by: The analyzer includes a sample introduction device, a sample testing device, an X-ray generator, a detection device, and a sample switching device, wherein... The sample introduction device is used to deliver the sample to be tested into the sample testing device; The sample testing device is equipped with one or more channels for the sample to pass through, and an X-ray generator is used to detect the sample as it passes through. The X-ray generator is used to generate X-rays and emit them into the sample testing device. The detection device is used to receive the radiation emitted by the sample in the sample testing device. The detection device and the X-ray generator are set opposite each other. The detection device can receive the radiation emitted by the sample to be tested by the X-ray generator. The sample switching device is used to drive the X-ray generator and the detection device. Rotation The movement allows it to switch between channels of different sample testing devices; The X-ray generating device includes a high-voltage power supply (11), an X-ray tube (12), and a high-voltage line (13). The high-voltage power supply (11) and the X-ray tube (12) are arranged side by side and connected by a high-voltage line (13). The detection device uses an X-ray matching detector (16). A sample positioning device (124) is fixedly installed at the intersection of the X-ray tube (12) and the detector (16). The sample positioning device (124) is set corresponding to the sample testing unit. A filter switching device is provided between the X-ray tube (12) and the sample positioning device (124). The filter switching device includes a light control box (118), a switching motor (119), a cover plate (123), a filter disc (120), a filter, and a belt (121). The cover plate (123) is fixedly installed on the light control box (118) to form the outer shell of the filter switching device. The filter disc (120) is installed inside the light control box (118), and one or more filters are installed on the filter disc (120). The switching motor (119) is fixedly installed on the light control box (118). The filter disc (120) is connected to the switching motor (119) via a belt (121). The switching motor (119) drives the filter disc (120) to rotate via the belt (121). The filter switching device is set corresponding to the light outlet (117) on the X-ray tube (12). The detector (16) is fixedly installed on the cover plate (123). A first sealing ring (122) is provided between the cover plate (123) and the light control box (118). The sample testing device is fixedly installed on the main frame. The sample testing device includes one or more sample testing units arranged side by side. The sample testing units are distributed in an arc shape. The center of the arc is the axis of the rotating part of the sample switching device. A shield (19) is provided behind the sample testing unit. The sample switching device includes a drive motor (110), a drive wheel (111), a synchronous wheel (14), a rotating shaft (15), an upper support plate (115), and a lower support plate (116). The rotating shaft (15) is fixedly installed on the upper support plate (115) and the lower support plate (116). The synchronous wheel (14) is fixedly installed on the rotating shaft (15). The drive motor (110) is fixedly installed on the main frame. The drive wheel (111) is fixedly installed on the rotor of the drive motor (110). A synchronous belt (112) is connected between the drive wheel (111) and the synchronous wheel (14). The axis of the rotating shaft (15) is the rotating axis of the sample switching device. The high-voltage power supply (11) and the X-ray tube (12) are fixedly installed on the upper support plate (115) and the lower support plate (116), respectively.

2. The multi-channel online fluid analyzer according to claim 1, characterized in that: The sample testing device, X-ray generating device, detection device and sample switching device constitute the main unit (1). The sample injection device adopts a pump station (2). The pump station (2) includes a pump station frame (23), a fluid pump and a pump station control valve (22). The fluid pump is installed on the pump station frame (23). There is one or more fluid pumps. The pump station control valve (22) is installed on the pump station frame (23). The pump station control valve (22) is connected to the fluid pump through a pipeline. There is one or more pump station control valves (22).

3. The multi-channel online fluid analyzer according to claim 2, characterized in that: The fluid pump includes a pump motor (211), a squeeze roller (212), a hose fixing bracket (213), a limiting bracket (214), and a support plate (216). The pump motor (211) and the squeeze roller (212) are installed together. The pump motor (211) is installed on the support plate (216). The squeeze roller (212) includes two or more squeeze rods distributed along the circumference. The hose fixing bracket (213) and the limiting bracket (214) are respectively installed on the support plate (216). The hose fixing bracket (213) has an arc shape inside, and its arc shape is adapted to the outer diameter of the squeeze roller (212). The limiting bracket (214) and the hose fixing bracket (213) are correspondingly arranged.

4. The multi-channel online fluid analyzer according to claim 3, characterized in that: The support plate (216) is fixedly installed on the hose guide frame (215), the hose guide frame (215) is located on the opposite side of the hose fixing frame (213), the bottom of the pump station frame (23) is equipped with casters (24), the bottom of the pump station frame (23) is equipped with fixed support feet (25), and the fixed support feet (25) are set at the positions corresponding to the casters (24).

5. The multi-channel online fluid analyzer according to claim 1, characterized in that: The sample testing unit includes a housing (181), a cover plate (182), a light-transmitting plate (187), and a sealing ring (188). A fluid cavity is provided inside the housing (181). The cover plate (182) is fixedly installed on the housing (181). The light-transmitting plate (187) is located between the housing (181) and the cover plate (182). A light-transmitting hole is provided on the cover plate (182). X-rays emitted by the X-ray tube (12) can pass through the light-transmitting plate (187) and irradiate the inside of the sample testing unit. A sealing ring (188) is provided between the light-transmitting plate (187) and the housing (181). A liquid inlet port (183) and a liquid outlet port (184) are installed on the housing (181). A liquid inlet sealing ring (185) is provided between the liquid inlet port (183) and the housing (181). A liquid outlet sealing ring (186) is provided between the liquid outlet port (184) and the housing (181).

6. The multi-channel online fluid analyzer according to claim 1, characterized in that: The drive motor (110) is fixedly mounted with a motor controller (113) on its side. The drive motor (110) is mounted on a motor mounting plate. The motor mounting plate is fixedly mounted on the main frame by a support column. A switching bracket (114) is fixedly mounted on the motor mounting plate. The switching bracket (114) is set at the top of the rotating shaft (15).

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