Gas path embedded type TCD gas detector

Abstract

The utility model relates to the technical field of TCD gas detectors, and discloses a gas circuit embedded TCD gas detector which comprises a detector body, a first connecting pipeline is fixedly connected to the front end of one side of the detector body, a testing pipeline is connected to one side of the first connecting pipeline in a threaded mode, a threaded shell is connected to the interior of the first connecting pipeline in a threaded mode, and a second connecting pipeline is connected to the other side of the first connecting pipeline in a threaded mode. The threaded shell is filled with water absorption sponge, a filter screen is connected to the interior of the test pipeline in a clamped mode, and clamping cavities are formed in the two sides of the filter screen. According to the utility model, impurities such as solid particles, grease particles and the like and water in test gas can be prevented from entering the gas path system through the filter screen and the water-absorbing sponge, and the arrangement of the poke rod is convenient for driving the clamping block to move on the fixed rod until one side of the clamping block is separated from the clamping groove, so that the filter screen and the test pipeline are separated; the second spring can drive the blocking block to move reversely, so that the blocking block is clamped in the circulation opening, and gas backflow is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of TCD gas detectors, in particular to a gas path embedded TCD gas detector. Background Art

[0002] The gas-path-embedded TCD gas detector is a gas detection device used to monitor the concentration of specific components in gas samples. TCD is the abbreviation of thermal conductivity detector. By measuring the temperature difference between the detection element and the reference element, the concentration of specific components in the gas sample can be determined. The gas-path-embedded TCD gas detector is a detector that places the gas sample directly into the gas path of the detector for detection.

[0003] Since the gas path implanted TCD gas detector requires the gas sample to be tested to be placed directly into the gas path of the detector, there is a risk of sample contamination. If the sample contains impurities or contaminants, it may block the gas channel or contaminate the detector, thereby affecting the accuracy of the test results.

[0004] Therefore, those skilled in the art provide a gas path embedded TCD gas detector to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a gas path embedded TCD gas detector is proposed, which can prevent impurities and moisture such as solid particles and grease particles in the test gas from entering the gas path system through a filter screen and a water-absorbing sponge. The setting of the toggle rod is convenient for driving the block to move on the fixed rod until one side of the block is out of the slot, thereby separating the filter screen and the test pipeline. The block can be driven to move in the opposite direction by a No. 2 spring, so that the block is stuck in the flow port, thereby preventing gas backflow.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] A gas path insertion type TCD gas detector, comprising a detector body, a front end of one side of the detector body is fixedly connected to a No. 1 connecting pipe, one side of the No. 1 connecting pipe is threadedly connected to a test pipe, the No. 1 connecting pipe is threadedly connected to a threaded shell, the threaded shell is filled with a water-absorbing sponge, the test pipe is clamped and connected to a filter screen, both sides of the filter screen are provided with clamping cavities, and both sides of the test pipe are provided with clamping grooves;

[0008] The front and rear ends of the detector body on the side away from the No. 1 connecting pipe are fixedly connected to the flow pipe, the flow pipe is internally threadedly connected to a connecting plate, the center of the connecting plate is internally slidably connected to a sliding rod, one side of the sliding rod is fixedly connected to a limit plate, the side of the limit plate away from the sliding rod is fixedly connected to a blocking block, and a flow opening is opened inside the flow pipe;

[0009] Through the above technical scheme, the setting of the test pipeline facilitates the delivery of the test sample gas to the test chamber inside the detector, the setting of the absorbent sponge facilitates the absorption of moisture in the sample gas to prevent moisture from entering the gas path system, the setting of the filter net facilitates the blocking of solid particles, grease particles and other impurities in the sample gas to prevent them from affecting the test results, the setting of the flow tube facilitates the test sample gas and the reference gas after detection to flow out of the detector, and the setting of the block facilitates the squeezing of the block when the gas passes through, so that the limit plate and the sliding rod are driven to move, and the gas can flow out through the flow port.

[0010] Furthermore, a fixing frame is fixedly connected inside the threaded housing, and the upper end of the fixing frame passes through the water-absorbing sponge;

[0011] Through the above technical solution, the threaded shell and the water-absorbing sponge can be easily installed into the No. 1 connecting pipe through the setting of the fixing frame.

[0012] Furthermore, a fixing rod is fixedly connected to the upper and lower ends of the clamping cavity, a clamping block is slidably connected to the inside of the clamping cavity, a No. 1 spring is sleeved on the outer wall of one side of the fixing rod, and one side of the No. 1 spring is fixedly connected to the clamping block;

[0013] Through the above technical solution, the setting of the No. 1 spring facilitates the block to move in the opposite direction when it rebounds, so that one side of the block is stuck into the slot, thereby completing the installation of the filter.

[0014] Furthermore, both sides of the filter screen are slidably connected with a toggle rod;

[0015] Through the above technical solution, the setting of the toggle rod facilitates the block to move within the upper limit position of the fixed rod.

[0016] Furthermore, a No. 2 spring is sleeved on the outer wall of the sliding rod, one side of the No. 2 spring is fixedly connected to the limit plate, and the side of the No. 2 spring away from the limit plate is fixedly connected to the connecting plate;

[0017] Through the above technical solution, the setting of the second spring makes it easy to drive the block to move when the gas flows forward, so that the gas flows out. When the gas flows backward, the block is squeezed to make it stuck in the flow port to prevent the gas from flowing backward.

[0018] Furthermore, a sealing rubber ring is fixedly connected to the outer wall of one side of the blocking block, and one side of the sealing rubber ring is fixedly connected to the limiting plate;

[0019] Through the above technical solution, the sealing rubber ring is provided to increase the sealing performance of the block, which can better prevent gas backflow.

[0020] Furthermore, a display screen is provided at the center of the upper end of the detector body;

[0021] Through the above technical solution, the temperature of the tungsten filament inside the test cavity and the reference cavity can be conveniently displayed by setting the display screen.

[0022] Furthermore, a reference pipe is fixedly connected to one side of the detector body, a nozzle is fixedly connected to one side of the reference pipe and the test pipe, and a second connecting pipe is threadedly connected to one side of the flow pipe;

[0023] Through the above technical solution, the reference pipeline is provided to facilitate the delivery of the gas used for reference and comparison to the inside of the controller, and the second connecting pipeline is provided to facilitate the connection with the gas processing equipment.

[0024] The utility model has the following beneficial effects:

[0025] 1. The utility model proposes a gas path embedded TCD gas detector. Compared with the existing TCD gas detector, the setting of the filter and the water-absorbing sponge facilitates to prevent the impurities in the sample gas from affecting the detection structure. The test gas passing through the filter can prevent impurities such as solid particles and grease particles from entering the gas path system. The water-absorbing sponge can absorb the moisture in the test gas to prevent the moisture from entering the gas path system and the detector. If the filter needs to be disassembled, the No. 1 connecting pipe can be separated from the test pipe, and the toggle rods on both sides can be pushed inward to move the block until one side of the block is out of the slot. The filter and the test pipe can be separated, which is convenient for cleaning or replacing the filter.

[0026] 2. Compared with the existing TCD gas detector, the utility model proposes a gas path insertion type TCD gas detector. The setting of the block facilitates the prevention of gas backflow after detection. The test gas and reference gas after detection will flow into the inside of the circulation tube. When the gas passes through, it will squeeze the block, so that the limit plate is driven to move, and the No. 2 spring is also in a compressed state. The gas can flow out through the circulation port. After the No. 2 spring rebounds, it will drive the block to move in the opposite direction and get stuck inside the circulation port, thereby preventing the gas from backflowing.

[0027] 3. Compared with the existing TCD gas detector, the gas path embedded TCD gas detector proposed in the utility model is convenient to prevent impurities and moisture such as solid particles and grease particles in the test gas from entering the gas path system through the setting of the filter net and the absorbent sponge. The setting of the toggle rod is convenient to drive the block to move on the fixed rod until one side of the block is out of the slot, thereby separating the filter net and the test pipe. The setting of the No. 2 spring is convenient to drive the block to move in the reverse direction, so that the block is stuck in the flow port, thereby preventing gas backflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an axonometric diagram of a gas path embedded TCD gas detector proposed by the utility model;

[0029] Figure 2 This is a structural schematic diagram of a No. 1 connecting pipe and a test pipe of a gas path insertion type TCD gas detector proposed by the utility model;

[0030] Figure 3 It is a partial top-sectional view of a test pipeline of a gas path insertion type TCD gas detector proposed by the utility model;

[0031] Figure 4 A top sectional view of a flow tube of a gas path embedded TCD gas detector proposed by the utility model;

[0032] Figure 5 The utility model provides a schematic structural diagram of a connecting plate and a sliding rod of a gas path embedded TCD gas detector.

[0033] Legend:

[0034] 1. Detector body; 2. No. 1 connecting pipe; 3. Test pipe; 4. Reference pipe; 5. Suction nozzle; 6. Threaded shell; 7. Water-absorbing sponge; 8. Fixed frame; 9. Filter screen; 10. Card connection chamber; 11. Fixed rod; 12. No. 1 spring; 13. Card block; 14. Toggle rod; 15. Card slot; 16. Flow tube; 17. No. 2 connecting pipe; 18. Connecting plate; 19. Sliding rod; 20. No. 2 spring; 21. Limit plate; 22. Sealing rubber ring; 23. Flow port; 24. Block; 25. Display screen. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the specific implementation of the utility model to clearly and completely describe the technical solutions in the specific implementation of the utility model. Obviously, the specific implementation described is only a part of the specific implementation of the utility model, not all of the specific implementation. Based on the specific implementation of the utility model, all other specific implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] Reference Figure 1-5 , a specific implementation method provided by the utility model:

[0037] A gas path insertion type TCD gas detector comprises a detector body 1, a front end of one side of the detector body 1 is fixedly connected to a No. 1 connecting pipe 2, a side of the No. 1 connecting pipe 2 is threadedly connected to a test pipe 3, the setting of the test pipe 3 facilitates the test sample gas to be sent to the test cavity inside the detector, the No. 1 connecting pipe 2 is internally threadedly connected to a threaded shell 6, the threaded shell 6 is filled with a water-absorbing sponge 7, the setting of the water-absorbing sponge 7 facilitates the absorption of moisture in the sample gas to prevent moisture from entering the gas path system, the threaded shell 6 is internally fixedly connected to a fixing frame 8, the upper end of the fixing frame 8 passes through the water-absorbing sponge 7, the setting of the fixing frame 8 facilitates the installation of the threaded shell 6 and the water-absorbing sponge 7 into the No. 1 connecting pipe 2, the test pipe 3 is internally connected to a filter screen 9 by snap-fitting, through the filter The setting of the net 9 is convenient for blocking solid particles, grease particles and other debris in the sample gas to prevent them from affecting the test results. A clamping cavity 10 is provided inside both sides of the filter 9, and a clamping groove 15 is provided inside both sides of the test pipe 3. The upper and lower ends of the clamping cavity 10 are fixedly connected to a fixing rod 11, and a clamping block 13 is slidably connected inside the clamping cavity 10. A spring 12 is sleeved on the outer wall of one side of the fixing rod 11, and one side of the spring 12 is fixedly connected to the clamping block 13. The setting of the spring 12 is convenient for driving the clamping block 13 to move in the opposite direction when it rebounds, so that one side of the clamping block 13 is clamped into the inside of the clamping groove 15, thereby completing the installation of the filter 9. A toggle rod 14 is slidably connected inside both sides of the filter 9, and the setting of the toggle rod 14 facilitates the driving of the clamping block 13 to move at the upper limit position of the fixing rod 11;

[0038] The detector body 1 is fixedly connected to the front and rear ends of the side away from the No. 1 connecting pipe 2 by a flow tube 16. The flow tube 16 is arranged to facilitate the test sample gas and the reference gas to flow out of the detector after detection. The flow tube 16 is internally threadedly connected to a connecting plate 18. A sliding rod 19 is internally slidably connected to the center of the connecting plate 18. One side of the sliding rod 19 is fixedly connected to a limiting plate 21. The outer wall of the sliding rod 19 is sleeved with a No. 2 spring 20. One side of the No. 2 spring 20 is fixedly connected to the limiting plate 21. The side of the No. 2 spring 20 away from the limiting plate 21 is fixedly connected to the connecting plate 18. The arrangement of the No. 2 spring 20 facilitates the block 24 to move when the gas flows in the forward direction. The block 24 is fixedly connected to the side of the limit plate 21 away from the sliding rod 19, and a sealing rubber ring 22 is fixedly connected to the outer wall of one side of the block 24. One side of the sealing rubber ring 22 is fixedly connected to the limit plate 21. The sealing performance of the block 24 is increased by setting the sealing rubber ring 22, which can better prevent the gas from flowing back. The flow pipe 16 is provided with a flow port 23. The block 24 is conveniently squeezed when the gas passes through, so that the block 24 drives the limit plate 21 and the sliding rod 19 to move, and the gas can flow out through the flow port 23.

[0039] A display screen 25 is provided at the center of the upper end of the detector body 1. The display screen 25 is provided to facilitate displaying the temperature of the tungsten filament inside the test cavity and the reference cavity. A reference pipe 4 is fixedly connected to one side of the detector body 1. A suction nozzle 5 is fixedly connected to one side of the reference pipe 4 and the test pipe 3. A No. 2 connecting pipe 17 is threadedly connected to one side of the flow tube 16. The reference pipe 4 facilitates the delivery of the gas used for reference and comparison to the inside of the controller. The No. 2 connecting pipe 17 facilitates connection with the gas processing equipment.

[0040] Working principle: When in use, connect the gas sample to be tested to the nozzle 5 of the test pipe 3, and connect the reference gas for comparison to the reference pipe 4. When passing through the pipe, the test gas will first pass through the filter 9 to prevent impurities such as solid particles and grease particles from entering the gas path system. Then the test gas passes through the absorbent sponge 7 to absorb the moisture in the test gas to prevent moisture from entering the gas path system and the detector. Both the test gas sample and the reference gas will pass through the heated tungsten wire. When the composition of the test gas sample changes, it will affect the thermal conductivity of the tungsten wire, thereby causing the temperature of the tungsten wire to change, and the data will be displayed on the display screen 25. The tested gas and reference gas will flow into the circulation tube 16 after testing. When the gas passes through, it will squeeze the block 24, causing the limit plate 21 to be moved. The No. 2 spring 20 is also in a compressed state, and the gas can flow out through the circulation port 23. After the No. 2 spring 20 rebounds, it will drive the block 24 to move in the opposite direction and get stuck inside the circulation port 23, thereby preventing the gas from flowing back. If the filter 9 needs to be disassembled, the No. 1 connecting pipe 2 can be separated from the test pipe 3, and the toggle rods 14 on both sides can be pushed inward to move the block 13 until one side of the block 13 is out of the slot 15. The filter 9 and the test pipe 3 can be separated, which is convenient for cleaning or replacing the filter.

[0041] Finally, it should be noted that the above is only a preferred specific implementation method of the present utility model and is not used to limit the present utility model. Although the present utility model is described in detail with reference to the aforementioned specific implementation methods, for those skilled in the art, they can still modify the technical solutions recorded in the aforementioned specific implementation methods, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A gas path embedded TCD gas detector, comprising a detector body (1), characterized in that: A first connecting pipe (2) is fixedly connected to the front end of one side of the detector body (1); a test pipe (3) is threadedly connected to one side of the first connecting pipe (2); a threaded outer shell (6) is threadedly connected to the inside of the first connecting pipe (2); a water-absorbing sponge (7) is filled inside the threaded outer shell (6); a filter screen (9) is snap-connected to the inside of the test pipe (3); snap-connecting cavities (10) are provided inside both sides of the filter screen (9); and snap-on grooves (15) are provided inside both sides of the test pipe (3); The detector body (1) is fixedly connected to a flow tube (16) at the front and rear ends of the side away from the No. 1 connecting pipe (2); a connecting plate (18) is threadedly connected to the inside of the flow tube (16); a sliding rod (19) is slidably connected to the inside of the center of the connecting plate (18); a limiting plate (21) is fixedly connected to one side of the sliding rod (19); a blocking block (24) is fixedly connected to the side of the limiting plate (21) away from the sliding rod (19); and a flow port (23) is opened inside the flow tube (16).

2. The gas path embedded TCD gas detector according to claim 1, characterized in that: A fixing frame (8) is fixedly connected inside the threaded housing (6), and the upper end of the fixing frame (8) passes through the water-absorbing sponge (7).

3. The gas path embedded TCD gas detector according to claim 1, characterized in that: A fixing rod (11) is fixedly connected to the upper and lower ends of the clamping cavity (10), a clamping block (13) is slidably connected to the inside of the clamping cavity (10), a No. 1 spring (12) is sleeved on the outer wall of one side of the fixing rod (11), and one side of the No. 1 spring (12) is fixedly connected to the clamping block (13).

4. The gas path embedded TCD gas detector according to claim 1, characterized in that: The inside of both sides of the filter screen (9) is slidably connected with a toggle rod (14).

5. The gas path embedded TCD gas detector according to claim 1, characterized in that: A No. 2 spring (20) is sleeved on the outer wall of the sliding rod (19), one side of the No. 2 spring (20) is fixedly connected to the limiting plate (21), and the side of the No. 2 spring (20) away from the limiting plate (21) is fixedly connected to the connecting plate (18).

6. The gas path embedded TCD gas detector according to claim 1, characterized in that: A sealing rubber ring (22) is fixedly connected to the outer wall of one side of the blocking block (24), and one side of the sealing rubber ring (22) is fixedly connected to the limiting plate (21).

7. The gas path embedded TCD gas detector according to claim 1, characterized in that: A display screen (25) is provided at the center of the upper end of the detector body (1).

8. The gas path embedded TCD gas detector according to claim 1, characterized in that: A reference pipe (4) is fixedly connected to one side of the detector body (1), a suction nozzle (5) is fixedly connected to one side of the reference pipe (4) and the test pipe (3), and a second connecting pipe (17) is threadedly connected to one side of the flow pipe (16).

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