Automatic odorizing device for gas pipeline

Abstract

The utility model relates to an automatic odorizing device for a gas pipeline. The device comprises a tank body, a gas pipeline body and an odorizing assembly used for adding an odorant in the tank body into the gas pipeline body. The diameter of the fan blades is slightly smaller than the inner diameter of the gas pipeline body, so that the fan blades can rotate in the whole gas pipeline body, gas with low flow speed can push the fan blades to rotate around the first rotating shaft, the first rotating shaft rotates to drive the cam to rotate, and the cam rotates to drive the rotating sleeve to rotate; the rotating sleeve rotates to drive the supporting shaft to move up and down, the supporting shaft moves up and down to drive the piston to slide up and down in the long pipe, and then the odorant in the tank body is added into the gas pipeline body, so that the natural gas flow rate sensing capacity is improved, and the amount of the odorant can be correspondingly changed according to the flow rate change of gas in the pipeline; according to the device, an odorizing agent and natural gas in a gas pipeline are mixed more uniformly, and the odorizing effect of the natural gas is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of gas odorization devices, specifically relating to an automatic odorization device for gas pipelines. Background Technology

[0002] An automatic odorizing device for gas pipelines is a device that adds a specific odorant to gas to give it an unpleasant smell, making it easier to identify. By automatically adding the odorant, the device ensures a uniform and stable concentration of odorant in the gas, thus playing a crucial role in the gas transmission and distribution process.

[0003] Automatic odorizing devices for gas pipelines need to adjust the amount of odorant added according to the change in gas flow rate in the pipeline in order to achieve precise odorization and ensure the odorization effect of natural gas, so as to ensure the safe use of gas by users. Existing gas odorizing devices generally add odorant into the gas pipeline by pressurizing it with a submersible pump. However, this method has the following problems: (1) When the gas flow rate is low, the gas in the pipeline may move from the blade gap, which means that the gas with a low flow rate cannot drive the blade to rotate. As a result, the actual amount of odorant added by the gas odorizing device does not match the flow rate of the gas in the pipeline, which means that the odorization dosage is inaccurate; (2) The added odorant is not mixed evenly with the gas in the gas pipeline, which makes it impossible to ensure the odorization effect of natural gas.

[0004] Therefore, it is necessary to improve the existing automatic odorization devices for gas pipelines. Utility Model Content

[0005] The first technical problem this invention aims to solve is that when the gas flow rate is low, the gas in the pipeline may move through the gap between the blades, causing the low-flowing gas to be unable to drive the blades to rotate. This results in a mismatch between the actual amount of odorant added by the gas odorizing device and the gas flow rate in the pipeline, leading to inaccurate odorization dosage. The second technical problem this invention aims to solve is that the added odorant does not mix evenly with the gas in the gas pipeline, resulting in an inability to ensure the odorization effect of natural gas. To address this, this invention provides an automatic odorizing device for gas pipelines.

[0006] This utility model is achieved through the following technical solution:

[0007] The inventors discovered through research that when the gas flow rate is low, the gas in the pipeline may move through the gaps between the blades, causing the low-velocity gas to be unable to drive the blades to rotate. This results in a mismatch between the actual amount of odorant added by the gas odorizing device and the gas flow rate in the pipeline, leading to inaccurate odorization dosage. This problem is caused by the small blade area in the pipeline. Furthermore, the added odorant is not mixed evenly with the gas in the pipeline, making it impossible to ensure the odorization effect of natural gas. This problem arises because the odorant is pressurized and added to the gas pipeline by a submersible pump.

[0008] This utility model provides an automatic odorizing device for gas pipelines, comprising: a tank for storing odorizing agent, a gas pipeline body, and an odorizing component for adding the odorizing agent from the tank into the gas pipeline body.

[0009] The tank is positioned above the gas pipeline body. The odorizing assembly includes an odorant delivery pipe, a first rotating shaft, a fan blade, a cam, a rotating sleeve, a support shaft, a rotating block, a base, a piston, a first valve, and a second valve. The odorant delivery pipe includes a long pipe and a main odorizing pipe branching off from the long pipe. One end of the long pipe is fixedly connected to the bottom of the tank. A first valve is fixedly installed on the input pipe. The main odorizing pipe branches off downstream of the first valve on the long pipe. The other end of the long pipe is connected to the outer periphery of a first opening on the gas pipeline body (i.e., the diameter of the long pipe is larger than the diameter of the first opening, and the other end of the long pipe is connected to the gas pipeline body wall outside the first opening). The main odorizing pipe is connected to a second opening on the gas pipeline body. A second valve is fixedly installed on the main odorizing pipe. The first rotating shaft extends into the gas pipeline body from one side of the long pipe through the first opening and is rotatably connected to the first opening. Multiple (e.g., two or three) of the first rotating shaft located inside the gas pipeline body are fixedly connected to the outside. (Or four) fan blades, which are driven to rotate by the gas flowing inside the gas pipeline, thereby driving the first rotating shaft to rotate. The first rotating shaft, located inside the long pipe, is inserted into and fixedly connected to a cam located outside the gas pipeline body. The cam rotates with the first rotating shaft. A protrusion extends outward from the side of the cam away from the gas pipeline body, and a rotating sleeve is fitted around the outside of the protrusion. The outside of the rotating sleeve is fixedly connected to one end of a support shaft, and a rotating block is fixedly connected to the other end of the support shaft. A piston is installed inside the long pipe, and a base is fixedly connected to the bottom of the piston. The rotating block is rotatably connected to the base. When the cam rotates with the first rotating shaft, it pushes the piston to slide up and down inside the long pipe through the support shaft. When the piston moves downward, the second valve closes and the first valve opens, allowing the odorant in the tank to enter the long pipe. When the piston moves upward, the second valve opens and the first valve closes, allowing the odorant in the long pipe to enter the main odorizing pipe, thus mixing the odorant with the natural gas inside the gas pipeline body. The main odorizing pipe is the main odorizing channel of the device, and the fan blades are used to ensure more uniform odorization and mixing.

[0010] Furthermore, the first and second valves are either check valves or one-way valves. A check valve, also known as a check valve, is a pressure-bearing device that allows the medium to flow in only one direction and prevents flow in the opposite direction. When the gas or liquid flows in the forward direction, the check valve opens; when there is no flow or no flow, the check valve automatically closes.

[0011] Furthermore, a sealing ring with a shape adapted to the first opening (outside the gas pipeline body) is provided. A first rotating shaft passes through the sealing ring and is inserted into a cam located outside the gas pipeline body, where it is fixedly connected. The first rotating shaft can rotate within the sealing ring. The sealing ring prevents natural gas from leaking from the gas pipeline body to the outside, thus avoiding injury.

[0012] Furthermore, the protrusion is a limiting disc, the longitudinal section of which is a T-shape rotated 90° counterclockwise, the rotating sleeve is fitted onto the horizontal part of the limiting disc, and the horizontal part of the limiting disc passes through the cavity inside the rotating sleeve and is fixedly connected to the cam to prevent the rotating sleeve from falling off the cam.

[0013] Furthermore, there are two bases connected by a pin, and the rotating block is rotatably connected to the inner side of the two bases via the pin. This pin connection allows the rotating block to rotate, increasing stability.

[0014] Furthermore, the automatic odorizing device for gas pipelines also includes a fixing assembly for supporting and fixing the tank and the gas pipeline body. The fixing assembly includes a support plate, support frames, support feet, fixing blocks, a second rotating shaft, a bidirectional threaded rod, a limiting plate, and fixing clamps. The tank passes through and is fixed to the support plate. Several vertically arranged support frames are fixedly installed at the bottom of the support plate, and horizontally arranged support feet are fixedly installed at the bottom of the support frames. A fixing block is fixedly installed at the end of the second rotating shaft away from the support frames. The rear of the second rotating shaft is fixedly connected to the bidirectional threaded rod. The second rotating shaft and the bidirectional threaded rod are rotatably installed in mounting holes provided on two support frames on the transverse sides of the gas pipeline body. The inner sides of the support frames... A limiting plate is fixedly installed on the wall, located above the second rotating shaft. The lower arc-shaped part of the fixing clamp (clamping head) is used to clamp and fix the gas pipeline body. A slider on one side of the top of the fixing clamp can slide within a groove on the limiting plate. The other side of the fixing clamp is fixedly connected to the limiting plate. A bidirectional threaded rod passes through mounting holes on the two upper vertical parts of the fixing clamp and is threadedly connected to them. Rotating the fixing block causes the bidirectional threaded rod to rotate, which in turn causes the top of one side of the fixing clamp to slide within the groove on the limiting plate. The two upper vertical parts of the fixing clamp move closer together (thus reducing the diameter of the circle formed by the lower arc-shaped part) to clamp and fix the gas pipeline body. Rotating the hexagonal block causes the bidirectional threaded rod to rotate, and the fixing clamp (clamping head) is limited by the limiting plate, allowing it to slide within the groove on the limiting plate to fix the gas pipeline body, preventing the device from loosening and thus improving its practicality.

[0015] Furthermore, the fixed block is a hexagonal block;

[0016] The fixing clamp is a long-headed, half-type pipe clamp;

[0017] The groove on the limit plate is a T-shaped groove in longitudinal section.

[0018] Furthermore, the main odor-inducing pipe is an L-shaped pipe.

[0019] Furthermore, the length (or diameter) of the vertical portion of the limiting disk (i.e., a large-diameter disc with a cylinder, the cylinder being slightly smaller than the diameter of the disc) is greater than the diameter of the rotating sleeve, and the diameter of the rotating sleeve is slightly greater than the width (or diameter) of the horizontal portion of the limiting disk, in order to prevent the rotating sleeve from falling off the cam.

[0020] Furthermore, the diameter of the fan blades is slightly smaller than the inner diameter of the gas pipeline body (e.g., 5-20 mm smaller), allowing the fan blades to rotate within the entire gas pipeline body.

[0021] Furthermore, the automatic odorizing device for the gas pipeline is interlocked with a flow meter installed on the gas pipeline body. The flow meter transmits the flow signal of the gas pipeline body to the control system, and then the control system adjusts the amount of odorant added by the automatic odorizing device. This avoids the signal lag of using a flow meter alone to control the amount of odorant added, ensuring that odorization is done proportionally every second. Typically, the flow velocity of the gas in the pipeline does not exceed 20 m / s.

[0022] Furthermore, the length of the limiting plate is less than or equal to half the distance between two adjacent support frames.

[0023] The working principle of this automatic odorizing device for gas pipelines is as follows: During operation, flowing gas enters the interior of the gas pipeline body, driving the fan blades to rotate around the first rotating shaft. The rotation of the fan blades drives the first rotating shaft to rotate, which in turn drives the cam to rotate. The rotation of the cam drives the rotating sleeve to rotate, which in turn drives the support shaft to move up and down. The up-and-down movement of the support shaft causes the piston to slide back and forth inside the long pipe. When the piston moves downward, the second valve (one-way valve) closes and the first valve (one-way valve) opens, allowing the odorant in the tank to enter the long pipe. When the piston moves upward, the second valve (one-way valve) opens and the first valve (one-way valve) closes, allowing the odorant in the long pipe to first enter the long pipe and then enter the interior of the gas pipeline body, ensuring a uniform mixture of the odorant and the natural gas inside the gas pipeline body. Because the fan blades rotate throughout the entire gas pipeline body, even gas with a relatively low flow rate can drive the fan blades to rotate around the first rotating shaft, causing the piston to slide back and forth inside the long pipe, thereby adding the odorant from the tank into the gas pipeline body. Therefore, this automatic odorizing device for gas pipelines improves the sensing capability of natural gas flow rate, and can adjust the amount of odorant added accordingly based on changes in the flow rate of the gas in the pipeline; this automatic odorizing device for gas pipelines makes the odorant and the natural gas inside the gas pipeline body mix more evenly, ensuring the odorization effect of the natural gas.

[0024] The technical solution of this utility model has the following beneficial effects:

[0025] (1) The automatic odorizing device for gas pipelines of this utility model sets the diameter of the fan blade to be slightly smaller than the inner diameter of the gas pipeline body, so that the fan blade can rotate inside the entire gas pipeline body. The gas with a small flow rate can also drive the fan blade to rotate around the first rotating shaft. The rotation of the first rotating shaft drives the cam to rotate, the rotation of the cam drives the rotating sleeve to rotate, the rotation of the rotating sleeve drives the support shaft to move up and down, and the up and down movement of the support shaft drives the piston to slide up and down in the long pipe, thereby adding the odorizing agent in the tank into the gas pipeline body. Therefore, the sensing ability of natural gas flow rate is improved, and the amount of odorizing agent added can be changed according to the change of gas flow rate in the pipeline, making the added odorizing agent dosage more accurate and improving the practicality of the device.

[0026] (2) The automatic odorizing device for gas pipelines of this utility model has a first valve and a second valve as a one-way valve or a check valve; when the piston moves downward, the first valve opens and the second valve closes, and the odorant in the tank enters the input pipe; when the piston moves upward, the second valve opens and the first valve closes, and the odorant in the input pipe enters the long pipe and then enters the gas pipeline body, so that the odorant and the natural gas inside the gas pipeline body are mixed. This device makes the odorant and the natural gas inside the gas pipeline body mix more evenly, ensuring the odorizing effect of natural gas. Attached Figure Description

[0027] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings, wherein:

[0028] Figure 1 This is a schematic diagram of the overall structure of the automatic odorizing device for gas pipelines according to this utility model;

[0029] Figure 2 This is a schematic diagram of the fan blade structure of the automatic odorizing device for gas pipelines according to this utility model;

[0030] Figure 3 This is a schematic diagram of the odorizing component of the automatic odorizing device for gas pipelines according to this utility model;

[0031] Figure 4 This is a schematic diagram of the piston structure of the automatic odorizing device for gas pipelines according to this utility model;

[0032] Figure 5 This is a schematic diagram of the structure of the fixing component of the automatic odorizing device for gas pipelines according to this utility model;

[0033] The components are: 1. Tank body, 21. First rotating shaft, 22. Fan blade, 23. Cam, 24. Rotating sleeve, 25. Support shaft, 26. Rotating block, 27. Base, 28. Piston, 29. Long pipe, 210. First valve, 211. Main odor-inducing pipe, 212. Second valve, 30. Support plate, 31. Support frame, 32. Support foot, 33. Fixing block, 34. Second rotating shaft, 35. Bidirectional threaded rod, 36. Limiting plate, 37. Fixing clamp, 4. Gas pipeline body. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. The terms "upper," "middle," "outer," "inner," "lower," "around," "left," "right," "front," "rear," "top," and "bottom," etc., indicating orientation or positional relationships, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] like Figure 1-5 As shown, the automatic odorizing device for gas pipelines of this utility model includes: a tank 1 for storing odorizing agent, a gas pipeline body 4, and an odorizing component for adding the odorizing agent from the tank 1 into the gas pipeline body 4.

[0037] The tank body 1 is positioned above the gas pipeline body 4. The odorizing assembly includes an odorant delivery pipe, a first rotating shaft 21, a fan blade 22, a cam 23, a rotating sleeve 24, a support shaft 25, a rotating block 26, a base 27, a piston 28, a first valve 210, and a second valve 212. The odorant delivery pipe includes a long pipe 29 and a main odorizing pipe 211 branching off from the long pipe. One end of the long pipe 29 is fixedly connected to the bottom of the tank body 1, and the first valve 210 is fixedly installed on the long pipe 29. The main odorizing pipe branches off downstream of the first valve of the long pipe, and the other end of the long pipe 29 is connected to a first opening on the gas pipeline body 4. The outer periphery connection (i.e., the diameter of the long pipe is larger than the diameter of the first opening, and the other end of the long pipe is connected to the wall of the gas pipeline body 4 on the outer periphery of the first opening), the main odorizing pipe 211 is connected to the second opening opened on the gas pipeline body 4, and a second valve 212 is fixedly installed on the main odorizing pipe 211. The first rotating shaft 21 extends into the gas pipeline body 4 from one side of the long pipe through the first opening and is rotatably connected to the first opening. Multiple (e.g., two, three, or four) fan blades 22 (e.g., semi-circular fan blades) are fixedly connected to the outside of the first rotating shaft 21 located inside the gas pipeline body 4. The fan blades 22 can be controlled by the gas pipeline. The gas flowing inside the main body 4 drives the rotation, thereby rotating the first rotating shaft 21. The first rotating shaft 21, located inside the long pipe, is inserted into and fixedly connected to a cam 23 located outside the gas pipe main body 4. The cam 23 can rotate with the first rotating shaft 21. A protrusion extends outward from the side of the cam 23 away from the gas pipe main body 4. A rotating sleeve 24 is fitted around the outside of the protrusion. The outside of the rotating sleeve 24 is fixedly connected to one end of a support shaft 25. The first rotating shaft 21 makes a circular motion between the opening of the gas pipe main body 4 and the central hole of the cam. A rotating block 26 is fixedly connected to the other end of the support shaft 25. The part is equipped with a piston 28, and a base 27 is fixedly connected to the bottom of the piston 28. The rotating block 26 is rotatably connected to the base 27. When the cam 23 rotates with the first rotating shaft 21, it pushes the piston 28 to slide up and down in the long tube 29 through the support shaft 25. When the piston 28 moves downward, the second valve 212 closes and the first valve 210 opens, and the odorant in the tank 1 enters the long tube 29. When the piston 28 moves upward, the second valve 212 opens and the first valve 210 closes, and the odorant in the long tube 29 enters the main odorizing pipe 211, so that the odorant enters the gas pipeline body 4 and mixes with the natural gas. When the piston moves downward, the first valve 210 opens due to the downward flow of gas (or suction). The second valve 212 is also a check valve (a check valve will open as long as the inlet pressure is higher than the outlet pressure, and will automatically close when they are equal or close). Utilizing the principle of pressure difference, when the outlet pressure is higher than the inlet pressure, it will automatically push the sealing structure inside the valve to close, and the odorant in the tank enters the long pipe. When the piston moves upward, the first valve closes due to the upward push of the gas, and the second valve opens, allowing the odorant in the long pipe to enter the main odorizing pipe.

[0038] Preferably, the long pipe 29 is C-shaped, that is, the shape or orientation of the long pipe 29 is such that it extends downward from the tank body, extends laterally to one side of the gas pipeline body 4, then extends downward to the middle of that side of the gas pipeline body 4, and then returns laterally to connect to the middle of that side of the gas pipeline body 4. See [reference needed]. Figure 3 .

[0039] In a preferred embodiment, the first valve 210 and the second valve 212 are one-way valves or check valves; when the piston 28 moves downward, the first valve 210 opens and the second valve 212 closes, allowing the odorant in the tank 1 to enter the long pipe 29; when the piston 28 moves upward, the second valve 212 opens and the first valve 210 closes, allowing the odorant in the long pipe 29 to enter the main odorizing pipe 211 and then enter the gas pipeline body 4, so that the odorant and the natural gas inside the gas pipeline body 4 are mixed.

[0040] In another preferred embodiment, a sealing ring adapted to the shape of the first opening (outside the gas pipeline body 4) is provided. A first rotating shaft 21 passes through the sealing ring and is inserted into a cam 23 located outside the gas pipeline body 4, where it is fixedly connected. The first rotating shaft 21 can rotate within the sealing ring. By providing the sealing ring, natural gas inside the gas pipeline body is prevented from leaking out, thus avoiding injury.

[0041] In another preferred embodiment, the protrusion is a limiting disk with a longitudinal section that is T-shaped and rotated 90° counterclockwise. A rotating sleeve 24 is fitted onto the horizontal part of the limiting disk and can rotate. The horizontal part of the limiting disk passes through the cavity inside the rotating sleeve 24 and is fixedly connected to the cam 23. The length (or diameter) of the vertical part of the limiting disk (i.e., a large-diameter disc with a cylinder, the cylinder being slightly smaller than the diameter of the disc) is greater than the diameter of the rotating sleeve 24, and the diameter of the rotating sleeve 24 is slightly greater than the width (or diameter) of the horizontal part of the limiting disk to prevent the rotating sleeve 24 from falling off the cam 23.

[0042] In another preferred embodiment, there are two bases 27, connected by a pin. The rotating block 26 is rotatably connected to the inner side of the two bases 27 via the pin. The pin connection allows the rotating block 26 to rotate, increasing stability.

[0043] In another preferred embodiment, the automatic odorizing device for the gas pipeline further includes a fixing assembly for supporting and fixing the tank 1 and the gas pipeline body 4. The fixing assembly includes a support plate 30, a support frame 31, a support foot 32, a fixing block 33, a second rotating shaft 34, a bidirectional threaded rod 35, a limiting plate 36, and a fixing clamp 37. The tank 1 passes through and is fixed on the support plate 30. Several vertically arranged support frames 31 are fixedly installed at the bottom of the support plate 30. For example, the support plate 30 is square, and four support frames 31 are respectively installed at the four corners of the support plate 30. A horizontally arranged support foot 32 is fixedly installed at the bottom of each support frame 31. A fixing block 33 is fixedly installed at the end of the second rotating shaft 34 away from the support frame 31. The bidirectional threaded rod 35 is fixedly connected to the rear of the second rotating shaft 34. The second rotating shaft 34 and the bidirectional threaded rod 35 are rotatably installed in the mounting holes provided on the two support frames 31 on the transverse sides of the gas pipeline body 4. Two clamps can be installed on the two longitudinally spaced support frames on both sides of the gas pipeline body 4. Limiting plates 36 (located above the bidirectional threaded rod 35) are fixedly installed on the inner side walls of both sides of the support frame 31. The lower arc-shaped part of the clamp 37 is used to clamp and fix the gas pipeline body 4. The top of one side of the clamp 37 can slide in the groove opened on the limiting plate 36 on one side. The top of the other side of the clamp is fixedly connected to the limiting plate. The groove on the limiting plate 36 limits the clamp 37, allowing it to slide and preventing it from rotating. The bidirectional threaded rod 35 passes through the mounting holes provided on the two upper vertical parts of the clamp 37 and is threadedly connected to them. By rotating the fixing block 33, the bidirectional threaded rod 35 is rotated, which in turn causes the top of one side of the clamp 37 to slide in the groove opened on the limiting plate 36. The two upper vertical parts of the clamp 37 come together, further causing the arc-shaped part of the clamp 37 to come together to clamp and fix the gas pipeline body 4.

[0044] In yet another preferred embodiment, the fixing block 33 is a hexagonal block;

[0045] Fixed clamp 37 is a long-headed, half-type pipe clamp;

[0046] The groove on the limiting plate 36 is a T-shaped groove with a longitudinal section.

[0047] In yet another preferred embodiment, the main odor-inducing pipe 211 is an L-shaped pipe.

[0048] Furthermore, the diameter of the fan blade 22 is equal to or slightly smaller than the inner diameter of the gas pipeline body 4, so that the fan blade 22 can rotate inside the entire gas pipeline body 4.

[0049] Furthermore, the automatic odorizing device for the gas pipeline is interlocked with the flow meter installed on the gas pipeline body 4. The flow meter transmits the flow signal of the gas pipeline body 4 to the control system, and then the control system adjusts the amount of odorant added by the automatic odorizing device for the gas pipeline.

[0050] Furthermore, the length of the limiting plate 36 is less than or equal to half the distance between two adjacent support frames 31.

[0051] The sealing ring can be made of rubber or other materials, and the piston can be made of alloy or other materials. Example 1

[0052] like Figure 1-5 As shown, the automatic odorizing device for gas pipelines in this embodiment includes: a tank 1 for storing odorizing agent, a gas pipeline body 4, an odorizing component for adding the odorizing agent in the tank 1 into the gas pipeline body 4, and a fixing component for supporting and fixing the tank 1 and the gas pipeline body 4.

[0053] The tank body 1 is positioned above the gas pipeline body 4. The odorizing assembly includes an odorant delivery pipe, a first rotating shaft 21, a fan blade 22, a cam 23, a rotating sleeve 24, a support shaft 25, a rotating block 26, a base 27, a piston 28, a first valve 210, and a second valve 212. The odorant delivery pipe includes a long pipe 29 and a main odorizing pipe 211 branching off from the long pipe. One end of the long pipe 29 is fixedly connected to the bottom of the tank body 1, and the first valve 210 is fixedly installed on the long pipe 29. The main odorizing pipe branches off downstream of the first valve of the long pipe, and the other end of the long pipe 29 is connected to the gas pipeline body 4. The outer periphery of the first opening on the gas pipeline body 4 is connected (i.e., the diameter of the long pipe is larger than the diameter of the first opening, and the other end of the long pipe is connected to the outer periphery of the gas pipeline body 4). The main odorizing pipe 211 is connected to the second opening on the gas pipeline body 4. A second valve 212 is fixedly installed on the main odorizing pipe 211. The first rotating shaft 21 extends into the gas pipeline body 4 from one side of the long pipe through the first opening and is rotatably connected to the first opening. Multiple fan blades 22 are fixedly connected to the outside of the first rotating shaft 21 located inside the gas pipeline body 4. The fan blades 22 can... Driven by the gas flowing inside the gas pipeline body 4, the first rotating shaft 21 rotates. The first rotating shaft 21, located inside the long pipe, is inserted into and fixedly connected to a cam 23 located outside the gas pipeline body 4. The cam 23 rotates with the first rotating shaft 21. A protrusion extends outward from the side of the cam 23 away from the gas pipeline body 4, and a rotating sleeve 24 is fitted around the protrusion. The outside of the rotating sleeve 24 is fixedly connected to one end of a support shaft 25, and a rotating block 26 is fixedly connected to the other end of the support shaft 25. A piston 28 is installed inside the long pipe. The bottom of the 8 is fixedly connected to the base 27, and the rotating block 26 is rotatably connected to the base 27. When the cam 23 rotates with the first rotating shaft 21, it pushes the piston 28 to slide up and down in the long tube 29 through the support shaft 25. When the piston 28 moves downward, the second valve 212 closes and the first valve 210 opens, and the odorant in the tank 1 enters the long tube 29. When the piston 28 moves upward, the second valve 212 opens and the first valve 210 closes, and the odorant in the long tube 29 enters the main odorizing pipe 211, so that the odorant enters the gas pipeline body 4 and mixes with the natural gas.

[0054] The fixing assembly includes a support plate 30, a support frame 31, support feet 32, a fixing block 33, a second rotating shaft 34, a bidirectional threaded rod 35, a limiting plate 36, and a fixing clamp 37. The tank body 1 passes through and is fixed on the support plate 30. Four vertically arranged support frames 31 are fixedly installed at the four corners of the bottom of the support plate 30. A horizontally arranged support foot 32 is fixedly installed at the bottom of each support frame 31. A fixing block 33 is fixedly installed at the end of the second rotating shaft 34 away from the support frame 31. The bidirectional threaded rod 35 is fixedly connected to the rear of the second rotating shaft 34. The second rotating shaft 34 and the bidirectional threaded rod 35 are rotatably installed in the mounting holes provided on the two support frames 31 on both sides of the gas pipeline body 4. Limiting plates 36 are fixedly installed on the inner sidewalls of both sides of the support 31. The lower arc-shaped part of the fixing clamp 37 is used to clamp and fix the gas pipeline body 4. The top of one side of the fixing clamp 37 can slide in the groove opened on the limiting plate 36 on one side. The top of the other side of the fixing clamp is fixedly connected to the limiting plate. The bidirectional threaded rod 35 passes through the mounting holes provided on the two upper vertical parts of the fixing clamp 37 and is threadedly connected to them. By rotating the fixing block 33, the bidirectional threaded rod 35 is rotated, and then the bidirectional threaded rod 35 rotates and drives the top of one side of the fixing clamp 37 to slide in the groove opened on the limiting plate 36. The arc-shaped part of the fixing clamp 37 comes together to clamp and fix the gas pipeline body 4 to prevent the device from loosening.

[0055] Among them, the first valve 210 and the second valve 212 are one-way valves; when the piston 28 moves downward, the first valve 210 opens and the second valve 212 closes, and the odorant in the tank 1 enters the input pipe 29; when the piston 28 moves upward, the second valve 212 opens and the first valve 210 closes, and the odorant in the input pipe 29 enters the first output pipe 211 and then enters the gas pipeline body 4, so that the odorant and the natural gas inside the gas pipeline body 4 are mixed.

[0056] The first opening (outside the gas pipeline body 4) is provided with a sealing ring that matches its shape. The first rotating shaft 21 passes through the sealing ring and is inserted into the cam 23 located outside the gas pipeline body 4 and fixedly connected to it. The first rotating shaft 21 can rotate within the sealing ring.

[0057] A limiting plate is fixedly installed at the end of the rotating sleeve 24 away from the cam 23. The longitudinal section of the limiting plate is a T-shape rotated 90° counterclockwise. The rotating sleeve 24 is sleeved on the horizontal part of the limiting plate. The horizontal part of the limiting plate passes through the cavity inside the rotating sleeve 24 and is fixedly connected to the cam 23 to prevent the rotating sleeve 24 from falling off the cam 23.

[0058] The inner sides of the two bases 27 are equipped with horizontally arranged pins, and the rotating block 26 is rotatably connected to the inner sides of the two bases 27 through the pins.

[0059] Among them, fixed block 33 is a hexagonal block;

[0060] Fixed clamp 37 is a long-headed, half-type pipe clamp;

[0061] The groove on the limiting plate 36 is a T-shaped groove in longitudinal section; the main odor-inducing pipe 211 is an L-shaped pipe.

[0062] The working principle of the automatic odorizing device for gas pipelines in this embodiment is as follows: During operation, the flowing gas enters the interior of the gas pipeline body 4, driving the fan blade 22 to rotate around the first rotating shaft 21. The rotation of the fan blade 22 drives the first rotating shaft 21 to rotate, which in turn drives the cam 23 to rotate. The rotation of the cam 23 drives the rotating sleeve 24 to rotate, which in turn drives the support shaft 25 to move up and down. The up and down movement of the support shaft 25 causes the piston 28 to slide back and forth in the long pipe. When the piston 28 moves downward, the second valve (one-way valve) 212 closes and the first valve (one-way valve) 210 opens, allowing the odorant in the tank 1 to enter the long pipe. When the piston 28 moves upward, the second valve (one-way valve) 212 opens and the first valve (one-way valve) 210 closes, allowing the odorant in the long pipe 29 to enter the main odorizing pipe 211 and then into the interior of the gas pipeline body 4, mixing the odorant with the natural gas inside the gas pipeline body 4 and improving efficiency. Because the fan blade 22 rotates inside the entire gas pipeline body 4, even gas with a relatively low flow rate can drive the fan blade 22 to rotate around the first rotating shaft 21, causing the piston 28 to slide up and down reciprocally inside the long pipe 211, thereby adding the odorant from the tank 1 into the gas pipeline body 4. Therefore, this automatic gas pipeline odorization device improves the sensing capability of natural gas flow rate, and can adjust the amount of odorant added according to changes in the gas flow rate within the pipeline; this automatic gas pipeline odorization device ensures a more uniform mixing of the odorant and the natural gas inside the gas pipeline body 4, guaranteeing the odorization effect of the natural gas.

[0063] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An automatic odorizing device for gas pipelines, characterized in that, It includes: a tank (1) for storing odorant, a gas pipeline body (4), and an odorizing assembly for adding the odorant from the tank (1) into the gas pipeline body (4). The tank (1) is positioned above the gas pipeline body (4). The odorizing assembly includes an odorant delivery pipe, a first rotating shaft (21), a fan blade (22), a cam (23), a rotating sleeve (24), a support shaft (25), a rotating block (26), a base (27), a piston (28), a first valve (210), and a second valve (212). The odorant delivery pipe includes a long pipe (29) and a main odorizing pipe (211) branching off from the long pipe. One end of the long pipe (29) is fixedly connected to the bottom of the tank (1). A first valve (210) is fixedly installed on the long pipe (29). The main odorizing pipe extends from the bottom of the first valve on the long pipe. The long pipe (29) is connected at one end to the outer periphery of the first opening on the gas pipeline body (4), and the diameter of the long pipe is larger than that of the first opening. The main odor-inducing pipe (211) is connected to the second opening on the gas pipeline body (4). A second valve (212) is fixedly installed on the main odor-inducing pipe (211). The first rotating shaft (21) extends from one side of the long pipe through the first opening into the gas pipeline body (4) and is rotatably connected to the first opening. Multiple fan blades (22) are fixedly connected to the outside of the first rotating shaft (21) located inside the gas pipeline body (4). The fan blades can be driven to rotate by the gas flowing inside the gas pipeline body, thereby driving The first rotating shaft (21) rotates, and the first rotating shaft (21) located inside the long pipe is inserted into the cam (23) set outside the gas pipeline body (4) and fixedly connected to it. The cam (23) can rotate with the first rotating shaft (21). A protrusion extends outward from the side of the cam (23) away from the gas pipeline body (4). A rotating sleeve (24) is sleeved on the outside of the protrusion. The outside of the rotating sleeve (24) is fixedly connected to one end of the support shaft (25). A rotating block (26) is fixedly connected to the other end of the support shaft (25). A piston (28) is set inside the long pipe. A base (27) is fixedly connected to the bottom of the piston (28). The rotating block (26) is rotatably connected to the base (27). When the cam (23) rotates with the first rotating shaft (21), it pushes the piston (28) to slide up and down in the long tube (29) through the support shaft (25). When the piston (28) moves downward, the second valve (212) closes and the first valve (210) opens, and the odorant in the tank (1) enters the long tube (29). When the piston (28) moves upward, the second valve (212) opens and the first valve (210) closes, and the odorant in the long tube (29) enters the main odorizing pipe (211), and the odorant enters the gas pipeline body (4) and mixes with the natural gas.

2. The automatic odorizing device for gas pipelines according to claim 1, characterized in that, The first valve (210) and the second valve (212) are one-way valves.

3. The automatic odorizing device for gas pipelines according to claim 1, characterized in that, A sealing ring adapted to the shape of the first opening is provided. The first rotating shaft (21) passes through the sealing ring and is inserted into the cam (23) located outside the gas pipeline body (4) and fixedly connected to it. The first rotating shaft (21) can rotate inside the sealing ring.

4. The automatic odorizing device for gas pipelines according to any one of claims 1-3, characterized in that, The protrusion is a limiting plate. The longitudinal section of the limiting plate is a T-shape rotated 90° counterclockwise. The rotating sleeve (24) is fitted onto the horizontal part of the limiting plate. The horizontal part of the limiting plate passes through the cavity inside the rotating sleeve (24) and is fixedly connected to the cam (23) to prevent the rotating sleeve (24) from falling off the cam (23).

5. The automatic odorizing device for gas pipelines according to any one of claims 1-3, characterized in that, There are two bases (27), and a pin is connected between the two bases. The rotating block (26) is rotatably connected to the inside of the two bases (27) through the pin.

6. The automatic odorizing device for gas pipelines according to any one of claims 1-3, characterized in that, The automatic odorizing device for gas pipelines also includes a fixing assembly for supporting and fixing the tank (1) and the gas pipeline body (4). The fixing assembly includes a support plate (30), a support frame (31), a support foot (32), a fixing block (33), a second rotating shaft (34), a bidirectional threaded rod (35), a limiting plate (36), and a fixing clamp (37). The tank (1) passes through and is fixed on the support plate (30). Several support frames (31) are fixedly installed at the bottom of the support plate (30). Support feet (32) are fixedly installed at the bottom of the support frames (31). The second rotating shaft (34) passes through the support frames (31) and is rotatably connected to them. A fixing block (33) is fixedly installed at the end of the second rotating shaft (34) away from the support frame (31). The bidirectional threaded rod (35) is fixedly connected to the rear of the second rotating shaft. The second rotating shaft (34) and the bidirectional threaded rod (35) are connected to each other. The rod (35) is rotatably installed in the mounting holes provided on the two support frames (31) on both sides of the gas pipeline body (4). Limiting plates (36) are fixedly installed on the inner side walls of both sides of the support frames (31). The lower arc-shaped part of the fixing clamp (37) is used to clamp and fix the gas pipeline body (4). A slider is provided on the top side of the fixing clamp (37) so that it can slide in the groove opened on the limiting plate (36) on one side. The bidirectional threaded rod (35) passes through the mounting holes of the two upper vertical parts of the fixing clamp (37) and is threadedly connected to them. By rotating the fixing block (33), the bidirectional threaded rod (35) is rotated. Then, the bidirectional threaded rod (35) rotates and drives the top side of the fixing clamp (37) to slide in the groove opened on the limiting plate (36). The upper vertical part of the fixing clamp (37) moves closer to clamp and fix the gas pipeline body (4).

7. The automatic odorizing device for gas pipelines according to claim 6, characterized in that, The fixed block (33) is a hexagonal block; and / or, The fixing clamp (37) is a long-headed half-type pipe clamp.

8. The automatic odorizing device for gas pipelines according to claim 7, characterized in that, The groove opened on the limiting plate (36) is a T-shaped groove with a longitudinal section.

9. The automatic odorizing device for gas pipelines according to any one of claims 1-3, characterized in that, The main odor-inducing pipe (211) is an L-shaped pipe.

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