Modularized switching multi-gas flow measuring device

Abstract

The invention relates to the field of gas flow detection, in particular to a modularized switching multi-gas flow measuring device which comprises an operation base, a module switching assembly and a positioning butt joint assembly, a movable control box is movably arranged at the upper end of the operation base through a lifting assembly, and the lifting assembly comprises a plurality of piston guide rods; a throttle pipe is horizontally arranged at the upper end of the operation base, so that the movable control box can move towards the throttle pipe, a pressure difference detection module is arranged at the upper end of the movable control box, and two switchable modularized pressure difference detection modules are arranged in the movable control box, so that when different gases need to be detected, the pressure difference detection modules can be switched according to the attributes of the gases needing to be detected; the proper pressure difference detection module is selected, then the pressure difference detection module is located in the center of the movable control box by switching pushing control of the telescopic rod, then the throttling pipe and the pressure difference detection module are rapidly structured under the cooperation effect of the lifting assembly and the positioning butt joint assembly, operation is easy, and the device is free of worry and convenient to use.

Description

Technical Field

[0001] This invention relates to the field of gas flow detection, specifically to a modular switching device for measuring multiple gas flow rates. Background Technology

[0002] Gas flow measurement refers to the process of quantitatively measuring the volume or mass of gas passing through a certain cross section per unit time using specific detection principles and equipment. There are many ways to measure gas flow, among which differential pressure measurement is a flow detection method based on Bernoulli's equation. This method involves setting up a specific throttling device in the gas flow pipeline. When the gas flows through the throttling device, the flow channel cross section contracts, resulting in an increase in flow velocity and a decrease in static pressure. By measuring the static pressure difference between the upstream and downstream of the throttling device, combined with the gas's physical properties and operating conditions, the gas flow rate is calculated using a formula. The cost of flow measurement devices varies depending on the type of gas being measured. Generally speaking, the higher the corrosion resistance of the measurement device, the higher the cost. When detecting multiple gases, it is necessary to select the appropriate measurement device to avoid corrosion of the measurement device by corrosive gases. However, the existing detection devices have relatively limited functions. If you want to replace the measurement module, you need to dismantle and reassemble the entire pipeline, which is cumbersome and inconvenient. Summary of the Invention

[0003] The purpose of this invention is to provide a modularly switchable multi-gas flow measurement device to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a modular switching multi-gas flow measurement device, comprising: An operating base is provided, and a movable control box is movably provided at the upper end of the operating base via a lifting assembly. The lifting assembly includes several piston guide rods, and a throttling tube is horizontally provided at the upper end of the operating base, so that the movable control box can move toward the throttling tube. The module switching component is located inside the differential pressure detection module at the upper end of the active control box. The module switching component includes a switching mounting slot, two differential pressure detection modules, and two switching telescopic rods, so that the two differential pressure detection modules can be used alternately. The positioning and docking assembly is located on both sides inside the active control box. The positioning and docking assembly includes two docking rods, and the docking rods are connected to the differential pressure detection module.

[0005] Preferably, the operating base has vertical support arms at the center of both sides, and the active control box has two side baffles on the side near the support arms, with the two side baffles contacting the two sides of the support arms respectively.

[0006] Preferably, several piston guide rods are vertically and symmetrically arranged on the upper end of the operating base. The lower end of the movable control box is provided with a first piston groove on the side near the piston guide rod. The upper end of the piston guide rod is movably inserted into the first piston groove and is provided with a first piston. The lower end of the first piston is provided with a first spring, and the first spring adjusts the piston guide rod.

[0007] Preferably, an annular flow divider groove is horizontally formed at the lower end of the piston guide rod in the operating base. The upper end of the annular flow divider groove is formed through the piston guide rod and the first piston. The annular flow divider groove is connected to the upper end of the first piston groove through the lifting air groove. An air source interface is formed on one side of the annular flow divider groove through the operating base.

[0008] Preferably, sliding guide rods are horizontally provided on both sides of the lower end of the switching installation slot, and notches are provided on both sides of the differential pressure detection module. Pressure tapping tubes are provided in the notches, with the openings of the pressure tapping tubes facing upwards.

[0009] Preferably, the notch end of the differential pressure detection module is provided with a positioning end cover by bolt insertion, and the lower end of the positioning end cover is provided with a horizontal sliding sleeve groove. The differential pressure detection module is movably connected to two sliding guide rods through the sliding sleeve grooves of the two positioning end covers.

[0010] Preferably, the two switching telescopic rods are horizontally inserted into both sides of the active control box, and the two switching telescopic rods are connected to one side of the two differential pressure detection modules. The active control box is provided with a cover plate on one side of the switching telescopic rod. The lower end face of the cover plate is flush with the upper end face of the pressure tapping tube. When the differential pressure detection module is not in use, the cover plate covers the differential pressure detection module.

[0011] Preferably, the center of both sides of the active control box is provided with a second piston groove horizontally, and the two second piston grooves are respectively connected to two of the first piston grooves. The docking rod is placed horizontally in the center of the second piston groove. A second piston is provided on the side of the docking rod close to the first piston groove. A second spring is provided on one side of the second piston. The second spring is sleeved on the docking rod.

[0012] Preferably, one side of the docking rod horizontally penetrates the second piston groove and is inserted into the switching installation groove. The center of the side of the positioning end cover away from the differential pressure detection module is provided with a docking groove. The end of the docking rod extending out of the second piston groove is provided with a tapered structure. When the differential pressure detection module moves to the center of the active control box, the tapered side of the docking rod is inserted into the docking groove of the positioning end cover.

[0013] Preferably, the throttling tube is horizontally connected to the upper end of the two support arms by a clamp. The side of the throttling tube that contacts the support arm is provided with anti-slip texture. The lower ends of both sides of the throttling tube are provided with vertically arranged collection tubes. The lower ends of the collection tubes are provided with docking caps. When the movable control box is raised, the two pressure taps of the differential pressure detection module are respectively inserted into the docking caps of the two collection tubes, and the side of the pressure tap that contacts the docking cap is provided with a compression sealing ring.

[0014] Compared with the prior art, the beneficial effects of the present invention are: Two switchable modular differential pressure detection modules are installed in the active control box. When different gases need to be detected, the appropriate differential pressure detection module can be selected according to the properties of the gas to be detected. Then, by pushing the telescopic rod, the differential pressure detection module is placed in the center of the active control box. Then, with the cooperation of the lifting component and the positioning docking component, the throttling tube and the differential pressure detection module are quickly assembled. The operation is simple, worry-free and convenient. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the side cross-section structure of the present invention; Figure 3 For the present invention Figure 2 Schematic diagram of part A; Figure 4 For the present invention Figure 2 Schematic diagram of part B; Figure 5 This is a schematic diagram showing the distribution of the differential pressure detection module of the present invention within the active control box; Figure 6 This is a schematic diagram showing the disassembled structure of the differential pressure detection module and the active control box of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of part C.

[0016] In the diagram: 1. Operating base; 2. Active control box; 3. Side baffle; 4. Support arm; 5. Differential pressure detection module; 6. Switching mounting slot; 7. Pressure tapping pipe; 8. Positioning end cover; 9. Sliding sleeve groove; 10. Sliding guide rod; 11. Piston guide rod; 12. First piston groove; 13. First piston; 14. First spring; 15. Second piston groove; 16. Docking rod; 17. Second piston; 18. Docking groove; 19. Second spring; 20. Annular diversion groove; 21. Lifting air groove; 22. Air source interface; 23. Throttling pipe; 24. Collection pipe; 25. Cover plate; 26. Switching telescopic rod. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present invention clear and complete, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of the present invention, and are merely illustrative of the embodiments of the present invention. They are not intended to limit the embodiments of the present invention. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figures 1-7 The present invention provides the following technical solutions: A modular switching multi-gas flow measurement device includes an operating base 1. A movable control box 2 is movably mounted on the upper end of the operating base 1 via a lifting assembly. The lifting assembly includes several piston guide rods 11. A throttling tube 23 is horizontally mounted on the upper end of the operating base 1, allowing the movable control box 2 to move towards the throttling tube 23. Support arms 4 are vertically mounted at the center of both sides of the operating base 1. Two side baffles 3 are mounted on the side of the movable control box 2 closest to the support arms 4, and the two side baffles 3 contact the sides of the support arms 4 respectively. Several piston guide rods 11 are vertically and symmetrically arranged on the upper end of the operating base 1. The lower part of the movable control box 2... Each end of the piston guide rod 11 is provided with a first piston groove 12. The upper end of the piston guide rod 11 is movably inserted into the first piston groove 12 and is provided with a first piston 13. The lower end of the first piston 13 is provided with a first spring 14. The first spring 14 adjusts the setting of the piston guide rod 11. The side baffle 3 is fitted with the support arm 4. Combined with the piston guide rod 11, the movable control box 2 can move vertically up and down stably along the support arm 4 and the piston guide rod 11. In the natural state, the design of the first spring 14 can make the lower end of the movable control box 2 fit with the upper end of the operating base 1, avoiding shaking in the non-operating state.

[0019] An annular flow divider 20 is horizontally formed at the lower end of the piston guide rod 11 inside the operating base 1. The upper end of the annular flow divider 20 is formed by lifting air grooves 21 that pass through the piston guide rod 11 and the first piston 13. The annular flow divider 20 is connected to the upper end of the first piston groove 12 through the lifting air grooves 21. An air source interface 22 is formed on one side of the annular flow divider 20 that passes through the operating base 1. The air source interface 22 can be connected to high-pressure gas generated by an air compressor. After the high-pressure gas enters the annular flow divider 20, it quickly reaches the upper part of the first piston groove 12 from the lifting air grooves 21. At this time, the air pressure in the upper part of the first piston groove 12 continues to increase, but the first piston 13 and the piston guide rod 11 do not move. Therefore, the movable control box 2 is pushed and lifted by the air pressure.

[0020] refer to Figure 5-7A module switching component is set up to enable the switching of two differential pressure detection modules 5. A differential pressure detection module 5 is located at the upper end of the active control box 2. The module switching component is housed within the differential pressure detection module 5 and includes a switching mounting slot 6, two differential pressure detection modules 5, and two switching telescopic rods 26, allowing the two differential pressure detection modules 5 to be used alternately. Sliding guide rods 10 are horizontally positioned on both sides of the lower end of the switching mounting slot 6. Notches are opened on both sides of each differential pressure detection module 5, and pressure tapping tubes 7 are installed within these notches, with their openings facing upwards. Positioning end caps 8 are bolted to the ends of the notches of the differential pressure detection modules 5. A sliding sleeve groove 9 is horizontally opened through the lower end of the positioning end caps 8. The two differential pressure detection modules 5 are movably connected to the two sliding guide rods 10 through the sliding sleeve grooves 9 of the two positioning end caps 8, allowing the two differential pressure detection modules 5 to move horizontally within the switching mounting slot 6. Two switching telescopic rods 26 are horizontally inserted on both sides of the movable control box 2. The two switching telescopic rods 26 are connected to one side of the two differential pressure detection modules 5 respectively. Each side of the movable control box 2 is provided with a cover plate 25. The lower end face of the cover plate 25 is flush with the upper end face of the pressure tapping tube 7. When the differential pressure detection module 5 is not in use, the cover plate 25 covers the differential pressure detection module 5. The PLC controls one of the switching telescopic rods 26 to move, so that the differential pressure detection module 5 moves to the center of the differential pressure detection module 5. During the movement, the switching telescopic rod 26 cooperates with the two sliding guide rods 10 to achieve stable three-point pushing.

[0021] Before the side baffle 3 is raised, the differential pressure detection module 5 is positioned and calibrated to be centered within the movable control box 2. The positioning docking assembly is located on both sides of the movable control box 2 and includes two docking rods 16 connected to the differential pressure detection module 5. A second piston groove 15 is horizontally opened at the center of each side of the movable control box 2, and each second piston groove 15 is connected to one of the two first piston grooves 12. The docking rod 16 is horizontally positioned at the center of the second piston groove 15. A second piston 17 is provided on the side of the docking rod 16 closest to the first piston groove 12, and a second spring 19 is provided on one side of the second piston 17. The second spring 19 is sleeved onto the docking rod 16. One side of the docking rod 16 horizontally penetrates the second piston groove 15 and inserts into the switching mounting slot 6. The positioning end cover 8 is located away from the differential pressure detection module. A docking groove 18 is provided on the center of one side of the 5. The end of the docking rod 16 extending out of the second piston groove 15 is set with a conical structure. When the differential pressure detection module 5 moves to the center of the active control box 2, the conical side of the docking rod 16 is inserted into the docking groove 18 of the positioning end cover 8. When the high pressure gas enters the first piston groove 12 from the annular diversion groove 20 and the lifting gas groove 21, since all the first piston grooves 12 are connected to the annular diversion groove 20, the gas pressure in each first piston groove 12 is not much different. The elastic force of the second spring 19 is less than that of the first spring 14. Before sufficient gas pressure is sent into the first piston groove 12 to lift the active control box 2, some gas has already pushed the docking rod 16 out of the second piston groove 15 and inserted into the docking groove 18. At this time, the position of the differential pressure detection module 5 is calibrated and positioned under the action of the conical structure of the docking rod 16.

[0022] The throttling tube 23 is horizontally connected to the upper ends of the two support arms 4 via a clamp. The side of the throttling tube 23 in contact with the support arm 4 has anti-slip texture. Both lower ends of the throttling tube 23 are vertically equipped with collection tubes 24, each with a docking cap at its lower end. When the movable control box 2 is raised, the two pressure taps 7 of the differential pressure detection module 5 are respectively inserted into the docking caps of the two collection tubes 24. A pressure sealing ring is provided on the side of the pressure tap 7 in contact with the docking cap. After the differential pressure detection module 5 is centered and calibrated within the movable control box 2 via the docking rod 16, the pressure taps 7 are in the sampling position. Directly below the manifold 24, the air pressure in the annular diversion groove 20 continues to increase, and the movable control box 2 completes vertical lifting. At this time, the pressure tapping pipe 7 connects with the acquisition pipe 24 to complete the seal, realizing the automatic alternation of the two differential pressure detection modules 5. When detecting multiple gases, the throttling pipe 23 is connected to the pipelines of multiple gases through a multi-port connector, and each gas pipeline is equipped with an electromagnetic shut-off valve. For detecting the flow rate of each gas, the differential pressure detection module 5 is used to switch the adapter between the telescopic rod 26 and the electromagnetic shut-off valve through PLC control. The switching operation is simple and convenient.

[0023] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A modular switching device for measuring multiple gas flow rates, characterized in that, include: An operating base (1) is provided with a movable control box (2) at its upper end via a lifting assembly. The lifting assembly includes several piston guide rods (11). A throttle tube (23) is provided horizontally at the upper end of the operating base (1), so that the movable control box (2) can move toward the throttle tube (23). The module switching component is provided with a differential pressure detection module (5) at the upper end of the active control box (2). The module switching component is located inside the differential pressure detection module (5). The module switching component includes a switching mounting slot (6), two differential pressure detection modules (5) and two switching telescopic rods (26), so that the two differential pressure detection modules (5) can be used alternately. The positioning docking assembly is located on both sides inside the active control box (2). The positioning docking assembly includes two docking rods (16), and the docking rods (16) are connected to the differential pressure detection module (5).

2. The modular switching multi-gas flow measurement device according to claim 1, characterized in that: The operating base (1) has vertical support arms (4) on both sides of the center. The active control box (2) has two side baffles (3) on the side near the support arms (4). The two side baffles (3) are in contact with the two sides of the support arms (4) respectively.

3. The modular switching multi-gas flow measurement device according to claim 2, characterized in that: Several piston guide rods (11) are vertically and symmetrically arranged on the upper end of the operating base (1). The lower end of the movable control box (2) is provided with a first piston groove (12) on the side near the piston guide rod (11). The upper end of the piston guide rod (11) is movably inserted into the first piston groove (12) and a first piston (13) is provided. The lower end of the first piston (13) is provided with a first spring (14), and the first spring (14) adjusts the setting of the piston guide rod (11).

4. The modular switching multi-gas flow measurement device according to claim 3, characterized in that: The operating base (1) has an annular diversion groove (20) horizontally opened at the lower end of the piston guide rod (11). The upper end of the annular diversion groove (20) is provided through the piston guide rod (11) and the first piston (13) and has a lifting air groove (21). The annular diversion groove (20) is connected to the upper end of the first piston groove (12) through the lifting air groove (21). One side of the annular diversion groove (20) is provided through the operating base (1) and has an air source interface (22).

5. The modular switching multi-gas flow measurement device according to claim 4, characterized in that: The lower end of the switching installation slot (6) is provided with sliding guide rods (10) on both sides. The differential pressure detection module (5) has openings on both sides, and pressure tapping tubes (7) are provided in the openings. The openings of the pressure tapping tubes (7) face upwards.

6. The modular switching multi-gas flow measurement device according to claim 5, characterized in that: The differential pressure detection module (5) has a positioning end cap (8) installed at the notch end by bolts. The lower end of the positioning end cap (8) has a horizontal sliding sleeve groove (9). The differential pressure detection module (5) is movably connected to two sliding guide rods (10) through the sliding sleeve grooves (9) of the two positioning end caps (8).

7. A modular switching multi-gas flow measurement device according to claim 6, characterized in that: The two switching telescopic rods (26) are horizontally inserted on both sides of the active control box (2). The two switching telescopic rods (26) are connected to one side of the two differential pressure detection modules (5). The active control box (2) is provided with a cover plate (25) on one side of the switching telescopic rod (26). The lower end face of the cover plate (25) is flush with the upper end face of the pressure tapping tube (7). When the differential pressure detection module (5) is not in use, the cover plate (25) covers the differential pressure detection module (5).

8. A modular switching multi-gas flow measurement device according to claim 7, characterized in that: The active control box (2) has two horizontally opened second piston grooves (15) at the center of both sides. The two second piston grooves (15) are respectively connected to two of the first piston grooves (12). The docking rod (16) is horizontally placed in the center of the second piston groove (15). The docking rod (16) is provided with a second piston (17) on the side of the first piston groove (12). A second spring (19) is provided on the side of the second piston (17). The second spring (19) is sleeved on the docking rod (16).

9. A modular switching multi-gas flow measurement device according to claim 8, characterized in that: The docking rod (16) extends horizontally through the second piston groove (15) and is inserted into the switching installation groove (6). The center of the positioning end cover (8) away from the differential pressure detection module (5) is provided with docking grooves (18). The end of the docking rod (16) extending out of the second piston groove (15) is set with a conical structure. When the differential pressure detection module (5) moves to the center of the active control box (2), the conical side of the docking rod (16) is inserted into the docking groove (18) of the positioning end cover (8).

10. A modular switching multi-gas flow measurement device according to claim 9, characterized in that: The throttling tube (23) is horizontally connected to the upper end of the two support arms (4) by a clamp. The side of the throttling tube (23) that contacts the support arm (4) is provided with anti-slip texture. The lower ends of both sides of the throttling tube (23) are provided with vertical collection tubes (24). The lower ends of the collection tubes (24) are provided with docking caps. When the active control box (2) is raised, the two pressure taps (7) of the differential pressure detection module (5) are respectively inserted into the docking caps of the two collection tubes (24), and the side of the pressure tap (7) that contacts the docking cap is provided with a compression sealing ring.

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