Odor adding device in natural gas pipeline

Abstract

The utility model relates to the technical field of natural gas odorization, and provides a natural gas pipeline internal odorization device which comprises a pipeline body and a tank body, the pipeline body is provided with a double-blow-off ball valve, the double-blow-off ball valve is provided with a valve rod and two blow-off pipes, and the two blow-off pipes are located on the two sides of the valve rod; a quick connector and a relief valve are arranged at the end, away from the double-relief ball valve, of the relief pipe, the relief valve is located between the double-relief ball valve and the quick connector, a filling pipe is arranged at the lower end of the tank body, a first control valve is arranged on the filling pipe, and the filling pipe is in threaded connection with the quick connector. Sealing structures are arranged between the filling pipe and the quick connector and between the quick connector and the blow-off valve. The rapid connector is additionally arranged on the bleeder, so that the filling pipe and the rapid connector can be conveniently assembled and disassembled, the convenience is improved, tetrahydrothiophene can be accurately added to a pipe network branch line, the constraint that tetrahydrothiophene can only be added from a gate station traditionally is eliminated, and meanwhile waste caused by excessive filling of tetrahydrothiophene is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of natural gas odorization, and in particular to an odorization device in a natural gas pipeline. Background Art

[0002] Natural gas itself is colorless, odorless, flammable and explosive. Once it leaks, it is difficult to detect. Therefore, national technical specifications require that urban gas should have a detectable odor to ensure that when a gas leak occurs, it can be immediately detected by people or instruments. Tetrahydrothiophene is mainly used as an odorant or warning agent for gas fuels such as city gas and natural gas.

[0003] According to the "Regulations on the Addition of Tetrahydrothiophene to Urban Gas Pipelines", which stipulates the addition ratio of tetrahydrothiophene to pipeline natural gas and the lower limit content at the end of the pipeline, our company has set up a fixed tetrahydrothiophene filling point at the starting end of the operating pipeline network. However, there are obvious differences in gas consumption at the user end of the branch pipe section of the operating pipeline network, which will cause obvious differences in the tetrahydrothiophene content of the gas at each point at the end of the gas pipeline network, resulting in some pipeline end monitoring points The detection values ​​are far higher than the lower limit content of tetrahydrothiophene at the specified pipeline end, and the detection values ​​of some pipeline end monitoring points cannot meet the lower limit standard. Increasing the amount of tetrahydrothiophene added at the starting end of the unified pipeline network will cause waste of tetrahydrothiophene, and the increase in tetrahydrothiophene content will affect the stability of natural gas, posing certain safety hazards. Summary of the invention

[0004] The purpose of the embodiment of the present application is to provide a natural gas pipeline odorizing device, which can achieve accurate addition of tetrahydrothiophene in the pipeline branch line, get rid of the traditional constraint of adding tetrahydrothiophene only from the gate station, and avoid the waste caused by excessive filling of tetrahydrothiophene.

[0005] The present application provides a natural gas pipeline odorization device, which adopts the following technical solutions:

[0006] A device for adding odor in a natural gas pipeline comprises a pipeline body and a tank body, wherein the pipeline body is provided with a double relief ball valve, the double relief ball valve is provided with a valve stem and two relief pipes, the two relief pipes are located on both sides of the valve stem, a quick connector and a relief valve are provided at one end of the relief pipe away from the double relief ball valve, the relief valve is located between the double relief ball valve and the quick connector, a filling pipe is provided at the lower end of the tank body, a first control valve is provided on the filling pipe, the filling pipe is threadedly connected to the quick connector, and sealing structures are provided between the filling pipe and the quick connector, and between the quick connector and the relief valve.

[0007] Preferably, a feeding pipe is provided on the tank body.

[0008] Preferably, a second control valve is provided on the feeding pipe.

[0009] Preferably, a radiation silencer is provided on the feeding pipe.

[0010] Preferably, the sealing structure is configured as a raw tape.

[0011] Preferably, the first control valve and the second control valve are both configured as stainless steel ball valves.

[0012] Beneficial effects of this application:

[0013] The present application adds a quick connector to the vent pipe, which facilitates assembly and disassembly between the filling pipe and the quick connector, thereby realizing the function of filling tetrahydrothiophene with the vent pipe. After completing the odorization operation inside the pipeline body, the filling pipe can be removed, and the filling pipe and the tank body can be moved as a whole to other filling points for reuse, or they can be reused at the same filling point, thereby improving convenience.

[0014] Before use, use a tetrahydrothiophene detector to detect the tetrahydrothiophene content at the end of the gas pipeline network. After calculating the difference between the actual content and the standard value, add a sufficient amount of tetrahydrothiophene into the tank body, first assemble the filling pipe and the quick connector, and then use the sealing structure to seal the filling pipe and the quick connector. Subsequently, open the vent valve and the first control valve in turn to allow the tetrahydrothiophene inside the tank body to be injected into the pipeline body through the vent pipe, thereby achieving precise addition of tetrahydrothiophene to the pipeline branch line, breaking away from the traditional constraint of only adding tetrahydrothiophene from the gate station, and avoiding the waste caused by excessive filling of tetrahydrothiophene. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of some embodiments of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of the structure in the middle.

[0018] The reference numerals are:

[0019] 1. Pipeline body; 2. Tank body; 3. Double relief ball valve; 4. Valve stem; 5. Relief pipe; 6. Quick connector; 7. Relief valve; 8. Filling pipe; 9. First control valve; 10. Sealing structure; 11. Feeding pipe; 12. Second control valve; 13. Relief silencer; 14. Valve well. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0026] Example

[0027] like Figure 1 and Figure 2 As shown, the odorizing device in the natural gas pipeline described in the embodiment of the present application includes a pipeline body 1 and a tank body 2. The pipeline body 1 is buried underground, and a valve well 14 is buried underground. A double-release ball valve 3 is arranged on the pipeline body 1. The double-release ball valve 3 is provided with a valve stem 4 and two release pipes 5. The upper end of the valve stem 4 extends to the inside of the valve well 14. The valve stem 4 is used to control the opening and closing of the double-release ball valve 3 or to adjust the gas flow. The two release pipes 5 are located on both sides of the valve stem 4. A quick connector 6 and a release valve 7 are arranged at one end of the release pipe 5 away from the double-release ball valve 3. The release valve 7 is located between the double-release ball valve 3 and the quick connector 6. In specific implementation, the tank body 2 is provided with two, and the tank body 2 A filling pipe 8 is provided at the lower end, and a first control valve 9 is provided on the filling pipe 8. The filling pipe 8 is threadedly connected to the quick connector 6. A sealing structure 10 is provided between the filling pipe 8 and the quick connector 6, and between the quick connector 6 and the relief valve 7. The quick connector 6 and the relief valve 7 are both located inside the valve well 14. By adding a quick connector 6 to the relief pipe 5, it is convenient to assemble and disassemble the filling pipe 8 and the quick connector 6, so as to realize the function of filling tetrahydrothiophene with the relief pipe 5. After completing the odorization operation inside the pipeline body 1, the filling pipe 8 can be removed, and the filling pipe 8 and the tank body 2 can be moved as a whole to other filling points for reuse, or can be reused at the same filling point, thereby improving convenience.

[0028] Before use, a tetrahydrothiophene detector is used to detect the content of tetrahydrothiophene at the end of the gas pipeline network. After calculating the difference between the actual content and the standard value, a sufficient amount of tetrahydrothiophene is added to the tank body 2. The filling pipe 8 and the quick connector 6 are first assembled, and then the filling pipe 8 and the quick connector 6 are sealed using the sealing structure 10. Subsequently, the vent valve 7 and the first control valve 9 are opened in sequence to allow the tetrahydrothiophene inside the tank body 2 to be injected into the pipeline body 1 through the vent pipe 5, thereby achieving accurate addition of tetrahydrothiophene to the branch line of the pipeline network, breaking away from the traditional constraint of only being able to add tetrahydrothiophene from the gate station, and avoiding the waste caused by excessive filling of tetrahydrothiophene.

[0029] When tetrahydrothiophene is added to the interior of the pipeline body 1, the double relief ball valve 3 is controlled to be closed, one of the relief pipes 5 is used to fill the upstream of the pipeline body 1, and the other relief pipe 5 is used to fill the downstream of the pipeline body 1. When relieving pressure, one of the relief pipes 5 is used to relieve pressure on the upstream of the pipeline body 1, and the other relief pipe 5 is used to relieve pressure on the downstream of the pipeline body 1, eliminating the safety hazard when removing the filling pipe 8. After completing the pressure relief operation, the double relief ball valve 3 is controlled to open, and the pipeline body 1 can transport the gas normally.

[0030] In this embodiment, a feeding pipe 11 is provided on the tank body 2 , and tetrahydrothiophene can be injected into the tank body 2 through the feeding pipe 11 .

[0031] In this embodiment, a second control valve 12 is provided on the feeding pipe 11. When tetrahydrothiophene is added, the second control valve 12 is closed to avoid leakage during the tetrahydrothiophene filling process. After the tetrahydrothiophene is filled, the relief valve 7 is closed, and the first control valve 9 and the second control valve 12 are opened to relieve the pressure of the device and eliminate the safety hazard when the filling pipe 8 is disassembled.

[0032] In this embodiment, a dissipation silencer 13 is provided on the feeding pipe 11, and the dissipation silencer 13 is used to reduce the noise generated during the pressure relief process.

[0033] In this embodiment, the sealing structure 10 is configured as a raw tape, which is non-toxic, odorless, and has excellent sealing, insulation, and corrosion resistance. It is used at pipe joints to enhance the airtightness of pipeline joints.

[0034] In this embodiment, the first control valve 9 and the second control valve 12 are both configured as stainless steel ball valves. The main features of the ball valves are compact structure, good sealing, easy operation and maintenance, and they are suitable for general working media such as water, solvents, acids and natural gas, and are also suitable for media with harsh working conditions.

[0035] The working principle of a natural gas pipeline odorization device according to the embodiment of the present application:

[0036] Before use, a tetrahydrothiophene detector is used to detect the content of tetrahydrothiophene at the end of the gas pipeline network. After calculating the difference between the actual content and the standard value, a sufficient amount of tetrahydrothiophene is added to the tank body 2. The filling pipe 8 and the quick connector 6 are first assembled, and then the filling pipe 8 and the quick connector 6 are sealed using the sealing structure 10. Subsequently, the vent valve 7 and the first control valve 9 are opened in sequence, so that the tetrahydrothiophene inside the tank body 2 is injected into the pipeline body 1 through the vent pipe 5, thereby realizing the precise addition of tetrahydrothiophene to the pipeline branch line, getting rid of the traditional constraint of adding tetrahydrothiophene only from the gate station, and avoiding the waste caused by excessive filling of tetrahydrothiophene. After the filling of tetrahydrothiophene is completed, the vent valve 7 is closed, and the first control valve 9 and the second control valve 12 are opened to relieve the pressure on the device, eliminating the safety hazard when the filling pipe 8 is removed.

[0037] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A natural gas pipeline odorizing device, characterized in that: It comprises a pipeline body and a tank body, wherein a double relief ball valve is arranged on the pipeline body, wherein a valve stem and two relief pipes are arranged on the double relief ball valve, wherein the two relief pipes are located on both sides of the valve stem, wherein a quick connector and a relief valve are arranged at one end of the relief pipe away from the double relief ball valve, wherein the relief valve is located between the double relief ball valve and the quick connector, wherein a filling pipe is arranged at the lower end of the tank body, wherein a first control valve is arranged on the filling pipe, wherein the filling pipe is threadedly connected with the quick connector, and sealing structures are arranged between the filling pipe and the quick connector, and between the quick connector and the relief valve.

2. The natural gas pipeline odorizing device according to claim 1, characterized in that: The tank body is provided with a feeding pipe.

3. The natural gas pipeline odorizing device according to claim 2, characterized in that: The feeding pipe is provided with a second control valve.

4. The odorizing device in a natural gas pipeline according to claim 3, characterized in that: The feeding pipe is provided with a radiation muffler.

5. The natural gas pipeline odorizing device according to claim 1, characterized in that: The sealing structure is configured as a raw tape.

6. The natural gas pipeline odorizing device according to claim 3, characterized in that: The first control valve and the second control valve are both configured as stainless steel ball valves.

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