Multifunctional combined sensor

Abstract

The invention belongs to the technical field of sensors, and particularly relates to a multifunctional combined sensor which comprises a monitoring pipe and an electric control part arranged above the monitoring pipe, and further comprises a fixed ring, the fixed ring is fixedly installed on one side of the interior of the monitoring pipe, a rotating ring is rotationally connected to the interior of the fixed ring, and the rotating ring is connected with the monitoring pipe; an annular detection gap is formed between the rotating ring and the fixed ring, and a humidity detection assembly is mounted in the annular detection gap; and the airflow rotating unit is arranged in the monitoring pipe. The detection accuracy of the humidity in the natural gas can be improved, the problem of inaccurate humidity monitoring caused by non-uniform distribution of water vapor in a pipeline is avoided, the humidity and the flow of the natural gas can be detected at the same time, the detection accuracy is improved, meanwhile, the pulse signal generated by metering the flow can be used for automatically driving external air to flow, and the detection accuracy is improved. When the flow is large, the detection timeliness of natural gas leakage outside the pipeline is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sensors, and in particular relates to a multifunctional combined sensor. Background Art

[0002] In natural gas transportation, factors such as natural gas humidity, pressure, flow, and leakage are crucial. Sensors can accurately monitor these parameters in real time, effectively prevent safety hazards such as overpressure and leakage, ensure transportation safety, optimize flow control, and improve transportation efficiency. Therefore, sensors are indispensable in natural gas transportation.

[0003] In the field of natural gas transportation, it is extremely important to accurately grasp the status of humidity, flow, leakage, etc. Various sensors bear this important task. In order to reduce costs and improve installation convenience, combined sensors are gradually used. For example, the multifunctional Internet of Things sensor with patent number CN113654597B integrates multiple functional probes to monitor different variables. However, this type of combined sensor generally only shares an electronic control part, and the various detection probes cannot work together. Moreover, due to the tight integration, they are easy to interfere with each other, which seriously affects the detection accuracy and is difficult to meet the stringent natural gas transportation monitoring needs. Summary of the invention

[0004] The object of the present invention is to provide a multifunctional combined sensor in view of the above problems.

[0005] To achieve the above object, the present invention adopts the following technical solution: a multifunctional combined sensor, comprising a monitoring tube and an electric control unit arranged above the monitoring tube, and further comprising:

[0006] A fixed ring, fixedly mounted on one side of the inner part of the monitoring tube, wherein the inner part of the fixed ring is rotatably connected with a rotating ring, and an annular detection gap is provided between the rotating ring and the fixed ring, and a humidity detection component is installed inside the annular detection gap;

[0007] An airflow rotating unit is arranged inside the monitoring pipe, and when the natural gas flows along the monitoring pipe, the airflow rotating unit is driven to rotate;

[0008] A gas capture unit is installed on the inner side of the rotating ring, and the airflow rotating unit is connected to the rotating ring through the gas capture unit, and the gas capture unit is used to capture the airflow at different positions in the monitoring tube;

[0009] A counting assembly is installed inside the annular detection gap;

[0010] A leakage monitoring unit is arranged between the electric control unit and the monitoring pipe, and is used to detect leaked natural gas;

[0011] The pulse air supply mechanism is connected to the leakage monitoring unit and is used to supply air to the inside of the leakage monitoring unit.

[0012] Preferably, the humidity detection component includes an annular plate fixedly installed inside the annular detection gap. An annular installation groove is formed on the inner ring wall of the annular plate, and an annular humidity-sensitive element is fixedly installed inside the annular installation groove. An annular breathable film is fixedly installed on the inner ring wall of the annular plate. The annular humidity-sensitive element is electrically connected to the electric control unit.

[0013] Preferably, the air flow rotation unit includes a support rod, and a turbine blade is fixedly connected to the rod end of the support rod.

[0014] Preferably, the gas capture unit includes a hollow block, and the hollow block is fixedly installed at one end of the support rod away from the turbine blade. Inclined capture plates are fixedly installed at both the upper and lower ends of the hollow block, and the two capture plates are symmetric about the axis of the support rod. Ventilation grooves communicating with the hollow block are formed inside the two capture plates, and a plurality of air inlet holes are formed on the groove walls of the two ventilation grooves. The air inlet holes are arranged on the windward side of the hollow block. A T-shaped block is fixedly connected to the end of the hollow block away from the support rod, and an exhaust groove is formed inside the T-shaped block. The exhaust groove communicates with the inside of the hollow block. Two connecting rods are fixedly installed on the side wall of the T-shaped block, and both connecting rods are fixedly connected to the inner wall of the rotating ring. The inside of one of the connecting rods is hollow, and an exhaust hole communicating with the connecting rod is formed on the side wall of the annular detection gap.

[0015] Preferably, the counting component includes a mounting groove block fixedly installed inside the annular detection gap. A membrane type pressure switch is installed inside the mounting groove block, and the membrane type pressure switch corresponds to the position of the exhaust hole. The membrane type pressure switch is electrically connected to the electric control unit.

[0016] Preferably, the leakage monitoring unit includes a mounting box arranged above the monitoring pipe. A mounting sleeve is fixedly communicated with the center of the top of the mounting box. A detachable natural gas detection probe is installed on the top of the mounting sleeve. Ventilation holes are formed on the side wall of the mounting sleeve. The natural gas detection probe is electrically connected to the electric control unit.

[0017] Preferably, the pulse air supply mechanism includes a mounting pipe fixedly installed on the top of the mounting box. A stepping motor is arranged inside the mounting pipe. The output end of the stepping motor is rotationally connected to the bottom of the mounting box, and a fan blade is installed at the output end of the stepping motor. The electric control unit controls the operation of the stepping motor according to the pulse signal fed back by the membrane type pressure switch. A plurality of air supply holes are formed at the outer edge of the bottom of the mounting box.

[0018] Preferably, a fixed cone head is fixedly installed inside the monitoring pipe, and the fixed cone head is arranged at the air inlet end of the monitoring pipe. A plurality of rectifying fins are fixedly arranged between the outer side wall of the fixed cone head and the inner wall of the monitoring pipe, and the end of the fixed cone head is rotatably connected to the shaft of the turbine blade.

[0019] Compared with the existing technology, the advantages of a multi-functional combined sensor are as follows:

[0020] 1. Through the mutual cooperation of the monitoring pipe, the electronic control unit, the fixed ring, the rotating ring, the annular detection gap, the humidity detection component, the air flow rotation unit and the gas capture unit, the gas capture unit is driven to rotate by the air flow, so that gas can be captured at various positions in the monitoring pipe, and the natural gas is centrally detected for humidity by the humidity detection component, thereby improving the detection accuracy of the humidity in the natural gas and avoiding the problem that the water vapor is unevenly distributed in the pipeline due to the different density from the natural gas, resulting in inaccurate humidity monitoring.

[0021] 2. Through the counting component set, when the gas capture unit is driven to rotate by the air flow, the number of rotations of the gas capture unit can be automatically measured, and the gas flow is measured and fed back through the number of rotations. Through the coordinated cooperation of humidity detection and flow detection, not only the humidity and flow of natural gas can be detected, but also the detection accuracy can be improved.

[0022] 3. Through the mutual cooperation of the leakage monitoring unit and the pulse air supply mechanism, the pulse signal generated during flow measurement can be used to automatically drive the flow of external air, and the greater the flow, the faster the external air flows. Therefore, when the flow is large, the timeliness of detecting natural gas leakage outside the pipeline can be improved. Description of the Drawings

[0023] Figure 1 is a schematic structural diagram of a multi-functional combined sensor provided by the present invention;

[0024] Figure 2 is a schematic internal structure diagram of the monitoring pipe of a multi-functional combined sensor provided by the present invention;

[0025] Figure 3 is a multi-functional combined sensor provided by the present invention Figure 2 structural enlarged view of part A in;

[0026] Figure 4 is a schematic three-dimensional sectional structure diagram of the capture plate of a multi-functional combined sensor provided by the present invention;

[0027] Figure 5 is a schematic structural diagram of the leakage monitoring unit of a multi-functional combined sensor provided by the present invention.

[0028] In the figure: 1 monitoring tube, 2 electronic control unit, 3 fixing ring, 4 rotating ring, 5 annular detection gap, 6 humidity detection component, 61 annular plate, 62 annular humidity-sensitive element, 63 annular breathable membrane, 7 air flow rotation unit, 71 support rod, 72 turbine blade, 8 gas capture unit, 81 hollow block, 82 capture plate, 83 ventilation groove, 84 air inlet hole, 85 T-shaped block, 86 exhaust groove, 87 connecting rod, 88 exhaust hole, 9 counting component, 91 mounting groove block, 92 diaphragm pressure switch, 10 leakage monitoring unit, 101 mounting box, 102 mounting sleeve, 103 natural gas detection probe, 104 ventilation hole, 11 pulse air supply mechanism, 111 mounting pipe, 112 stepper motor, 113 fan blade, 114 air supply hole, 12 fixed cone head, 13 rectifying fin. Specific implementation mode

[0029] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0030] As Figures 1-5 shown, a multifunctional combined sensor includes a monitoring tube 1 and an electronic control unit 2 arranged above the monitoring tube 1, and further includes: a fixing ring 3, the fixing ring 3 is fixedly installed on one side inside the monitoring tube 1, a rotating ring 4 is rotatably connected inside the fixing ring 3, and an annular detection gap 5 is arranged between the rotating ring 4 and the fixing ring 3. A humidity detection component 6 is installed inside the annular detection gap 5. The humidity detection component 6 includes an annular plate 61 fixedly installed inside the annular detection gap 5. An annular installation groove is formed on the inner ring wall of the annular plate 61, and an annular humidity-sensitive element 62 is fixedly installed inside the annular installation groove. An annular breathable membrane 63 is fixedly installed on the inner ring wall of the annular plate 61. The annular humidity-sensitive element 62 is electrically connected to the electronic control unit 2. The resistance of the annular humidity-sensitive element 62 will change after absorbing water vapor.

[0031] An air flow rotation unit 7 is arranged inside the monitoring tube 1. When natural gas flows inside the monitoring tube 1, it will drive the air flow rotation unit 7 to rotate. The air flow rotation unit 7 includes a support rod 71, and a turbine blade 72 is fixedly connected to the rod end of the support rod 71. When the air flow flows along the axis direction of the turbine blade 72, it can drive the turbine blade 72 to rotate.

[0032] The gas capture unit 8 is installed inside the rotating ring 4, and the air flow rotating unit 7 is drivingly connected to the rotating ring 4 through the gas capture unit 8. The gas capture unit 8 is used to capture the air flows at different positions in the monitoring pipe 1. The gas capture unit 8 includes a hollow block 81, and the hollow block 81 is fixedly installed at one end of the support rod 71 away from the turbine blade 72. Inclined capture plates 82 are fixedly installed at both the upper and lower ends of the hollow block 81, and the two capture plates 82 are symmetric about the axis of the support rod 71. Ventilation grooves 83 communicating with the hollow block 81 are formed inside both capture plates 82, and a plurality of air inlet holes 84 are formed in the groove walls of the two ventilation grooves 83. The air inlet holes 84 are arranged on the windward surface of the hollow block 81. A T-shaped block 85 is fixedly communicated with one end of the hollow block 81 away from the support rod 71, and an exhaust groove 86 is formed inside the T-shaped block 85. The exhaust groove 86 communicates with the inside of the hollow block 81. Two connecting rods 87 are fixedly installed on the side wall of the T-shaped block 85, and both two connecting rods 87 are fixedly connected to the inner wall of the rotating ring 4. The inside of one of the connecting rods 87 is hollow, and an exhaust hole 88 communicating with the connecting rod 87 is formed in the side wall of the annular detection gap 5.

[0033] The counting component 9 is installed inside the annular detection gap 5. The counting component 9 includes a mounting groove block 91 fixedly installed inside the annular detection gap 5, and a diaphragm pressure switch 92 is installed inside the mounting groove block 91. The diaphragm pressure switch 92 corresponds to the position of the exhaust hole 88. The diaphragm pressure switch 92 is electrically connected to the electric control unit 2. Under the impact of the air flow ejected from the exhaust hole 88, the sensing end of the diaphragm pressure switch 92 will deform, so as to promote the moving contact to close, and then a closed electrical signal is generated.

[0034] The leakage monitoring unit 10 is arranged between the electric control unit 2 and the monitoring pipe 1. The leakage monitoring unit 10 is used to detect the leaked natural gas. The leakage monitoring unit 10 includes a mounting box 101 arranged above the monitoring pipe 1. A mounting sleeve 102 is fixedly communicated with the center of the top of the mounting box 101. A detachable natural gas detection probe 103 is installed on the top of the mounting sleeve 102. A ventilation hole 104 is formed in the side wall of the mounting sleeve 102. The natural gas detection probe 103 is electrically connected to the electric control unit 2. The natural gas detection probe 103 adopts an electrochemical sensor type detection probe, which is used to detect certain specific components in natural gas through an electrochemical reaction. For example, it can detect impurities such as hydrogen sulfide, so as to indirectly judge whether the natural gas leaks.

[0035] The pulse air supply mechanism 11 is connected to the leakage monitoring unit 10. The pulse air supply mechanism 11 is used to supply air to the inside of the leakage monitoring unit 10. The pulse air supply mechanism 11 includes an installation pipe 111 fixedly installed on the top of the installation box 101. A stepping motor 112 is arranged inside the installation pipe 111. The output end of the stepping motor 112 is rotatably connected to the bottom of the installation box 101, and a fan blade 113 is installed at the output end of the stepping motor 112. The electronic control unit 2 controls the operation of the stepping motor 112 according to the pulse signal fed back by the diaphragm pressure switch 92. A plurality of air supply holes 114 are formed at the outer edge of the bottom of the installation box 101. When the stepping motor 112 drives the fan blade 113 to rotate, it can drive the air below the fan blade 113 to flow upward.

[0036] A fixed cone head 12 is fixedly installed inside the monitoring pipe 1, and the fixed cone head 12 is arranged at the air inlet end of the monitoring pipe 1. A plurality of rectifying fins 13 are fixedly arranged between the outer side wall of the fixed cone head 12 and the inner wall of the monitoring pipe 1. The end of the fixed cone head 12 is rotatably connected to the shaft part of the turbine blade 72. When natural gas enters the inside of the monitoring pipe 1, the rectifying fins 13 can guide the natural gas to enter the turbine blade 72 in a stable axial flow state.

[0037] The operation principle of the present invention is described as follows: Install the monitoring pipe 1 in the natural gas pipeline, and then connect the external power supply cable and signal cable to the connector of the electronic control unit 2;

[0038] When natural gas flows through the pipeline and enters the inside of the monitoring pipe 1, the natural gas flows through the turbine blade 72 after passing through the rectifying fins 13 (when natural gas enters the inside of the monitoring pipe 1, the rectifying fins 13 will force the natural gas to flow in a specific direction, making the originally disordered and irregular flow field become more regular and parallel, and guiding the natural gas to enter the turbine blade 72 in a stable axial flow state). When the air flow passes through the turbine blade 72, the air flow will generate an oblique acting force on the turbine blade 72, thereby driving the turbine blade 72 to rotate. The rotation of the turbine blade 72 will drive the hollow block 81 to rotate through the support rod 71, and the hollow block 81 will drive the two capture plates 82 to rotate. When the two capture plates 82 rotate, part of the air flow in the monitoring pipe 1 will enter the ventilation groove 83 through the air inlet holes 84 on the side wall of the air. Since the distances between the respective air inlet holes 84 and the hollow block 81 are different, and the capture plates 82 rotate with the hollow block 81, the air flows at different positions in the monitoring pipe 1 will enter the ventilation groove 83 (different positions refer to different positions near the pipe wall and far from the pipe wall at the same cross-section), so as to ensure the comprehensiveness of the collection of natural gas in the monitoring pipe 1 (since water vapor is generally heavier than natural gas, when it is transported along with natural gas, it is often distributed below, so the distribution of water vapor is uneven. By capturing the natural gas air flows at different positions, the accuracy of the subsequent humidity detection of natural gas can be improved);

[0039] The airflow entering the ventilation groove 83 will enter the hollow block 81, and then enter the annular detection gap 5 through the exhaust groove 86, the hollow connecting rod 87 and the exhaust holes 88. After the water vapor in the natural gas contacts the annular humidity-sensitive element 62 through the annular breathable membrane 63, the resistance of the annular humidity-sensitive element 62 will change. The measurement circuit of the electronic control unit 2 can judge the humidity of the current natural gas by measuring the resistance of the annular humidity-sensitive element 62, and can convert the resistance into a standard electrical signal for output;

[0040] Secondly, every time the turbine blade 72 rotates one circle, the turbine blade 72 will drive the rotating ring 4 to rotate one circle synchronously through the support rod 71, the hollow block 81, the T-shaped block 85 and the support rod 71. Every time the rotating ring 4 rotates one circle, the exhaust hole 88 will pass by the diaphragm pressure switch 92 once. Under the action of the exhaust pressure of the exhaust hole 88, the diaphragm pressure switch 92 will generate a closing pulse signal under the pressure action and feedback the pulse signal to the electronic control unit 2. The electronic control unit 2 can judge the current natural gas flow rate based on the frequency of the received pulse signal;

[0041] Finally, every time the electronic control unit 2 receives the electrical signal fed back by the diaphragm pressure switch 92, the electronic control unit 2 will control the stepping motor 112 to work once. The stepping motor 112 will drive the fan blade 113 to rotate 360°. When the fan blade 113 rotates, it can drive the air inside the installation box 101 to flow from bottom to top into the installation sleeve 102. The natural gas detection probe 103 can detect whether there is natural gas in the air and feedback an electrical signal to the electronic control unit 2 when detecting natural gas. When the natural gas flow rate increases, the impact of the natural gas on the inside of the pipeline increases, and the possibility of its leakage increases. Therefore, when the natural gas flow rate increases, the speed at which the turbine blade 72 drives the rotating ring 4 to rotate becomes faster. At this time, the frequency of the electrical signal fed back by the diaphragm pressure switch 92 to the electronic control unit 2 increases, and the working frequency of the electronic control unit 2 driving the stepping motor 112 will also increase, so as to accelerate the air flow at the natural gas detection probe 103 and ensure the timeliness and comprehensiveness of the natural gas leakage detection. When the natural gas flow rate is relatively small, the possibility of natural gas leakage becomes smaller. At this time, weakening the air flow at the natural gas detection probe 103 can improve the air stability at the natural gas detection probe 103 and is conducive to accurately detecting weak natural gas in the air.

[0042] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A multifunctional combined sensor, comprising a monitoring tube (1) and an electric control unit (2) arranged above the monitoring tube (1), characterized in that, Further included are: A fixed ring (3), fixedly installed on one inner side of the monitoring pipe (1). A rotating ring (4) is rotatably connected inside the fixed ring (3), and an annular detection gap (5) is provided between the rotating ring (4) and the fixed ring (3). A humidity detection component (6) is installed inside the annular detection gap (5); An air flow rotation unit (7), arranged inside the monitoring pipe (1). When natural gas flows inside the monitoring pipe (1), it will drive the air flow rotation unit (7) to rotate; A gas capture unit (8), installed inside the rotating ring (4), and the air flow rotation unit (7) is drivingly connected to the rotating ring (4) through the gas capture unit (8). The gas capture unit (8) is used to capture air flows at different positions inside the monitoring pipe (1); A counting component (9), installed inside the annular detection gap (5); A leakage monitoring unit (10), arranged between the electric control part (2) and the monitoring pipe (1). The leakage monitoring unit (10) is used to detect leaked natural gas; A pulse air supply mechanism (11), connected to the leakage monitoring unit (10). The pulse air supply mechanism (11) is used to supply air into the leakage monitoring unit (10).

2. The multifunctional combined sensor according to claim 1, wherein The humidity detection component (6) includes an annular plate (61) fixedly installed inside the annular detection gap (5). An annular installation groove is formed on the inner ring wall of the annular plate (61), and an annular humidity-sensitive element (62) is fixedly installed inside the annular installation groove. An annular air-permeable membrane (63) is fixedly installed on the inner ring wall of the annular plate (61). The annular humidity-sensitive element (62) is electrically connected to the electric control part (2).

3. A multifunctional combined sensor according to claim 1, characterized in that, The air flow rotation unit (7) includes a support rod (71), and a turbine blade (72) is fixedly connected to the rod end of the support rod (71).

4. The multifunctional combined sensor according to claim 3, characterized in that, The gas capture unit (8) includes a hollow block (81), and the hollow block (81) is fixedly installed at one end of the support rod (71) away from the turbine blade (72). Inclined capture plates (82) are fixedly installed at both the upper and lower ends of the hollow block (81), and the two capture plates (82) are symmetric about the axis of the support rod (71). Air ventilation grooves (83) communicating with the hollow block (81) are formed inside both of the two capture plates (82), and a plurality of air intake holes (84) are formed on the groove walls of the two air ventilation grooves (83). The air intake holes (84) are arranged on the windward side of the hollow block (81). A T-shaped block (85) is fixedly connected to one end of the hollow block (81) away from the support rod (71), and an exhaust groove (86) is formed inside the T-shaped block (85). The exhaust groove (86) communicates with the inside of the hollow block (81). Two connecting rods (87) are fixedly installed on the side wall of the T-shaped block (85), and both of the two connecting rods (87) are fixedly connected to the inner wall of the rotating ring (4). The inside of one of the connecting rods (87) is hollow, and an exhaust hole (88) communicating with the connecting rod (87) is formed on the side wall of the annular detection gap (5).

5. A multifunctional combined sensor according to claim 4, characterized in that, The counting component (9) includes a mounting groove block (91) fixedly installed inside the annular detection gap (5), and a diaphragm pressure switch (92) is installed inside the mounting groove block (91). The diaphragm pressure switch (92) corresponds to the position of the exhaust hole (88), and the diaphragm pressure switch (92) is electrically connected to the electronic control unit (2).

6. The multifunctional combined sensor according to claim 5, characterized in that, The leakage monitoring unit (10) includes a mounting box (101) arranged above the monitoring pipe (1). A mounting sleeve (102) is fixedly communicated with the center of the top of the mounting box (101). A detachable natural gas detection probe (103) is installed on the top of the mounting sleeve (102). A ventilation hole (104) is formed in the side wall of the mounting sleeve (102). The natural gas detection probe (103) is electrically connected to the electronic control unit (2).

7. A multifunctional combined sensor according to claim 6, wherein, The pulse air supply mechanism (11) includes a mounting pipe (111) fixedly installed on the top of the mounting box (101). A stepping motor (112) is arranged inside the mounting pipe (111). The output end of the stepping motor (112) is rotatably connected to the bottom of the mounting box (101), and a fan blade (113) is installed at the output end of the stepping motor (112). The electronic control unit (2) controls the operation of the stepping motor (112) according to the pulse signal fed back by the diaphragm pressure switch (92). A plurality of air supply holes (114) are formed at the outer edge of the bottom of the mounting box (101).

8. A multi-functional combined sensor according to claim 3, characterized in that, A fixed cone head (12) is fixedly installed inside the monitoring pipe (1), and the fixed cone head (12) is arranged at the air inlet end of the monitoring pipe (1). A plurality of rectifying fins (13) are fixedly arranged between the outer side wall of the fixed cone head (12) and the inner wall of the monitoring pipe (1). The end of the fixed cone head (12) is rotatably connected to the shaft part of the turbine blade (72).

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