Hierarchical gas odorant concentration detection simulation device

Abstract

The utility model discloses a graded gas odorant concentration detection simulation device, which belongs to the technical field of odorant detection and comprises a base, support frames are fixed on two sides of the top of the base through bolts, a barrel cover is hermetically connected between the support frames through a pipeline, and a simulation mechanism is arranged in the barrel cover; according to the utility model, the grading detection simulation device composed of the cylinder cover, the simulation mechanism, the grading sampling pipe, the drying air heater, the drying cooling fan and the like is designed, so that the grading sampling pipe can sample simulation gas at different positions of the simulation bent pipe; and the concentration of the odorant in the gas at the current position is analyzed through the odorant concentration tester, so that a worker can conveniently obtain the change of the concentration data of the odorant along with the change of the length of the pipeline.

Description

Technical Field

[0001] This utility model relates to the field of odorant detection technology, and in particular to a graded gas odorant concentration detection simulation device. Background Technology

[0002] Odorants, as chemical substances used to add special odors to colorless and odorless gases (such as natural gas and liquefied petroleum gas), play a crucial role in the gas industry. Their main components are tetrahydrothiophene (THT), tributyl mercaptan (TBM), and ethanethiol (C2H5SH). They not only improve the detectability of gas leaks but also promptly alert people to safety precautions when gas leaks occur.

[0003] The recommended addition amount of odorant in natural gas is 20–50 mg / m³, with the lowest detectable concentration in case of gas leakage being 0.08 mg / m³. During pipeline transportation, the odorant concentration is affected by various factors, such as pipeline material, length, and pressure, all of which can cause changes in the tetrahydrothiophene added at the initial stage during transport. Furthermore, relying solely on the initial addition amount as a basis for judgment may lead to over-odorization, increasing costs and potentially causing adverse effects on the environment and human health.

[0004] Traditional detection equipment mostly measures the concentration of odorant in leaked gas at the end of the gas pipe. This method is limited and singular, unable to simulate the interference of the pipeline on the odorant under different conditions. Therefore, the obtained odorant concentration is inaccurate and cannot be used as a warning value for users. To solve the above problems, a graded gas odorant concentration detection simulation device is proposed. Utility Model Content

[0005] The main purpose of this invention is to provide a graded gas odorant concentration detection simulation device, which solves the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved by adopting the following technical solution:

[0007] A staged gas odorant concentration detection simulation device includes a base, with support frames fixed to the top two sides of the base by bolts, and a cylindrical cover sealed between the support frames by pipes, and a simulation mechanism is provided inside the cylindrical cover;

[0008] The simulation mechanism includes a simulated curved tube that is tightly fixed to the inner wall of the shroud. The two outer ends of the simulated curved tube are formed with an air inlet straight pipe and an exhaust straight pipe. A number of graded sampling tubes that penetrate the shroud are connected to one side of the outer wall of the simulated curved tube. The bottom of the graded sampling tubes is connected to an odorant concentration tester.

[0009] The outer two sides of the support frame are provided with ventilation pipes in sealed communication with the inside of the cylinder cover, and the bottom of the ventilation pipes is respectively connected with a dry hot air blower and a dry cold air fan.

[0010] Further, the air inlet straight pipe is connected with a malodorous gas adding tank through a valve.

[0011] Further, the malodorous agent concentration tester is detachably installed with the base through the bottom lug.

[0012] Further, the top of the cylinder cover is symmetrically provided with a first exhaust pipe and a second exhaust pipe in communication with the inside of the cylinder cover, and the first exhaust pipe and the second exhaust pipe are both provided with a hand valve.

[0013] Further, the dry hot air blower is composed of a heating assembly and an air inlet fan, and the dry cold air fan is composed of an air cooling fan and a refrigeration assembly.

[0014] Further, one end of the ventilation pipe in the cylinder cover is sleeved with a solenoid valve.

[0015] The beneficial technical effects of the utility model are as follows:

[0016] The utility model discloses a hierarchical detection simulation device which is composed of a cylinder cover, a simulation mechanism, a hierarchical sampling pipe, a dry hot air blower and a dry cold air fan, and can realize the following effects:

[0017] 1. The hierarchical sampling pipe can sample simulation gas at different positions of the simulation elbow pipe, and the current position of the malodorous agent concentration tester can analyze the concentration of the malodorous agent in the gas, which is beneficial to the change of the concentration data of the malodorous agent with the change of the pipeline length.

[0018] 2. The dry hot air blower and the dry cold air fan can provide cold and hot environment conditions for the simulation elbow pipe, so that the malodorous agent concentration tester can obtain the concentration change of the malodorous agent in the simulation gas under different environments, which is beneficial to providing reference for the concentration warning data of the malodorous agent in the actual gas. DRAWINGS

[0019] Figure 1 It is a front view structural schematic diagram of a preferred embodiment of the hierarchical gas malodorous agent concentration detection simulation device according to the utility model.

[0020] Figure 2 It is a rear view structural schematic diagram of a preferred embodiment of the hierarchical gas malodorous agent concentration detection simulation device according to the utility model.

[0021] Figure 3 It is a structural schematic diagram of the cylinder cover outer wall after being opened in a preferred embodiment of the hierarchical gas malodorous agent concentration detection simulation device according to the utility model.

[0022] Figure 4 Structure schematic diagram after the removal of the cylinder cover in a preferred embodiment of the hierarchical gas odorant concentration detection simulation device according to the utility model.

[0023] The reference signs are explained as follows:

[0024] 1, base; 2, cylinder cover; 3, simulation mechanism; 301, air inlet straight pipe; 302, simulation elbow pipe; 303, air outlet straight pipe; 4, odor adding tank; 5, drying hot air blower; 6, drying cold air fan; 7, air pipe; 8, odorant concentration tester; 9, hierarchical sampling pipe; 10, first air outlet pipe; 11, second air outlet pipe; 12, support frame; 13, electromagnetic valve. DETAILED DESCRIPTION

[0025] In order to make the technical scheme of the utility model clearer and more explicit for those skilled in the art, the utility model will be described in further detail below in combination with embodiments and drawings, but the implementation manner of the utility model is not limited to this.

[0026] As shown in Figures 1-4 The hierarchical gas odorant concentration detection simulation device provided by the embodiment comprises a base 1, support frames 12 are fixed on the top of the base 1 through bolts, a cylinder cover 2 is sealingly connected between the support frames 12 through a pipeline, and a simulation mechanism 3 is arranged inside the cylinder cover 2; the simulation mechanism 3 comprises a simulation elbow pipe 302 fixedly arranged on the inner wall of the cylinder cover 2, air inlet straight pipes 301 and air outlet straight pipes 303 are formed at the outer ends of the simulation elbow pipe 302, a plurality of hierarchical sampling pipes 9 penetrating through the cylinder cover 2 are connected to one side of the outer wall of the simulation elbow pipe 302, and an odorant concentration tester 8 is connected to the bottom of the hierarchical sampling pipes 9; air pipes 7 sealingly connected to the inside of the cylinder cover 2 are arranged on the outer sides of the support frames 12, and drying hot air blowers 5 and drying cold air fans 6 are respectively connected to the bottom sides of the air pipes 7.

[0027] In the above structure, the cylinder cover 2 is made of heat preservation material and plays a sealing protection role, so that the simulation mechanism 3 can simulate detection in a stable environment; the three groups of pipelines in the simulation mechanism 3 are all metal pipes of the same material, and the simulation elbow pipe 302 is designed in a spiral structure in the cylinder cover 2, which not only increases the length of the simulation pipeline and is beneficial to simulate the change of the concentration of the odorant in the actual long-distance pipeline transportation of the gas, but also reduces the length of the device.

[0028] The odorant concentration tester 8 adopts the principle of electrochemical detection, detects the concentration of the simulated gas with added odorant entering from the hierarchical sampling pipes 9 through an electrochemical sensor, and displays specific numerical values through an external display screen.

[0029] The air inlet straight pipe 301 is connected with the odor adding tank 4 through a valve, the air inlet straight pipe 301 is connected with an air compressor, the air inlet straight pipe 301 sends the air compressed by the air compressor into the simulation elbow pipe 302, the simulation elbow pipe 302 simulates the conveying environment of natural gas, the odor adding tank 4 adds odorizing agent to the high-pressure air in the air inlet straight pipe 301 in a dropwise manner, and 20ml of odorizing agent is added per cubic meter of air.

[0030] The odor concentration tester 8 is detachably installed with the base 1 through the bottom lug.

[0031] The top of the cylinder cover 2 is symmetrically provided with a first exhaust pipe 10 and a second exhaust pipe 11 which are in communication with the inside of the cylinder cover 2, the first exhaust pipe 10 and the second exhaust pipe 11 are both provided with a hand valve, when the first exhaust pipe 10 is used, the second exhaust pipe 11 is closed, and is used for passing in heated gas, when the second exhaust pipe 11 is used, the first exhaust pipe 10 is closed, and is used for passing in refrigerated gas.

[0032] The drying hot air fan 5 is composed of a heating assembly and an air inlet fan, and the drying cold air fan 6 is composed of a wind cooling fan and a refrigeration assembly.

[0033] The air pipe 7 is provided with an electromagnetic valve 13 at one end in the cylinder cover 2, only one group of the two groups of electromagnetic valves 13 can be opened at a time, so as to avoid that the hot gas or the cold gas enters the air source equipment.

[0034] The working principle of the device is that when the device is used, an external power supply and an external control device are connected.

[0035] The air inlet straight pipe 301 is connected with an air compressor, the simulation gas provided is natural air, the pressure and the flow rate of the simulation gas are the same as the data of the gas in the pipeline conveying, the odor adding tank 4 at the top of the air inlet straight pipe 301 adds odorizing agent in a dropwise manner at a set flow rate, and the added amount is 20mg / m3.

[0036] The simulation gas mixed with the odorizing agent is conveyed into the simulation elbow pipe 302, the environment of long-distance transportation of the simulation gas in the pipeline is realized, the external communication grading sampling pipe 9 is connected at different sections of the simulation elbow pipe 302, the mixed gas at the current position is sucked out by using the sampling pump in the odor concentration tester 8, is detected in the detection chamber by using a high-sensitivity sensor, the concentration of the odorizing agent in the simulation gas at the current position is obtained, and the other two positions of the simulation elbow pipe 302 are sampled and analyzed in the same way, so that the concentration data of the odorizing agent in the simulation gas is obtained when the gas leaks along with the change of the length of the pipeline.

[0037] Then, the dry hot air blower 5 blows 50℃ hot air into the cylinder cover 2, the hot air evenly covers the wall of the simulation elbow 302, so that the simulation elbow 302 is heated, the simulation summer high temperature environment interferes with the odorant concentration, the hot air is discharged from the first exhaust pipe 10, the valve of the second exhaust pipe 11 is closed, the electromagnetic valve 13 on the dry cold air fan side is closed; the dry cold air fan blows 5-8℃ cold air into the cylinder cover 2, the cold air evenly covers the wall of the simulation elbow 302, so that the simulation elbow 302 is cooled, the simulation winter low temperature environment interferes with the odorant concentration, the cold air is discharged from the second exhaust pipe 11, the valve of the first exhaust pipe 10 is closed, the electromagnetic valve 13 on the dry hot air blower 5 side is closed.

[0038] The above is only further embodiments of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and concept of the present application within the disclosed range, which belongs to the protection scope of the present application.

Claims

1. A stepwise gas odorant concentration detection simulation device comprising a base (1), characterized in that: The top of the base (1) is fixed with support frame (12) on both sides by bolts, the support frame (12) is sealed and connected with cylinder cover (2) by pipeline, the inside of the cylinder cover (2) is provided with simulation mechanism (3); The simulation mechanism (3) includes simulation elbow (302) fixed on the inner wall of the cylinder cover (2), the outside of the simulation elbow (302) is formed with air inlet straight pipe (301) and exhaust straight pipe (303), the outer wall of the simulation elbow (302) is connected with a plurality of hierarchical sampling tube (9) penetrating the cylinder cover (2), the bottom of the hierarchical sampling tube (9) is communicated with odor concentration tester (8); The outside of the support frame (12) is provided with air pipe (7) sealed and communicated with the inside of the cylinder cover (2), the bottom of the air pipe (7) is connected with drying hot air blower (5) and drying cold air fan (6) respectively.

2. A modular gas odorant concentration detection simulator according to claim 1, wherein: The air inlet straight pipe (301) is connected with odor adding tank (4) through valve, and the air inlet straight pipe (301) is connected with air compressor.

3. A modular gas odorant concentration detection simulator according to claim 2, wherein: The odor concentration tester (8) is detachably installed with the base (1) through the bottom lug.

4. A modular gas odorant concentration detection simulator according to claim 3 wherein: The top of the cylinder cover (2) is symmetrically provided with first exhaust pipe (10) and second exhaust pipe (11) communicated with the inside of the cylinder cover (2), the first exhaust pipe (10) and the second exhaust pipe (11) are provided with hand valve.

5. A modular gas odorant concentration detection simulator according to claim 4 wherein: The drying hot air blower (5) is composed of heating assembly and air inlet fan, and the drying cold air fan (6) is composed of air cooling fan and refrigeration assembly.

6. A modular gas odorant concentration detection simulator according to claim 5 wherein: The air pipe (7) is sleeved with electromagnetic valve (13) at one end in the cylinder cover (2).

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