Gas control system of winding structure B-type pipe

Abstract

The utility model discloses a gas control system of a winding structure B-type pipe. The gas control system is composed of an air control system, a natural gas control system, a microcomputer control system, a premixing device, a first gas outlet pipe and a second gas outlet pipe. The air control system is composed of an air filtering and purifying tank, a first air inlet ball valve, a first control regulating valve, a first gas flow meter and an air inlet pipeline. And the natural gas control system consists of a pressure gauge, a second gas inlet ball valve, a second control regulating valve, a second gas flow meter and a natural gas inlet pipeline. The microcomputer control system adjusts and controls the first control regulating valve and the second control regulating valve at the same time, so that the mixing proportion of air and natural gas is in the optimal proportion, sufficient, uniform and stable combustion of mixed gas of air and natural gas is achieved, the combustion efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of production equipment for B-type pipes with a polyethylene winding structure, in particular to a gas control system for B-type pipes with a winding structure. Background Art

[0002] Polyethylene (PE) has the characteristics of high strength, stable chemical properties, high temperature resistance, corrosion resistance, aging resistance, and non-toxicity. It is widely used in drainage pipes, water pipes, gas pipes, communication pipes and other fields. In particular, the wear resistance of high-density polyethylene (HDPE) ranks first among all engineering plastics, which is eye-catching. HDPE winding structure B-type pipe is a plastic pipe with a certain thickness and specification formed by heating and softening on a preheated steel circular roller mold and spirally winding or superimposing. Due to its unique molding process, pipes with a diameter of up to 4 meters can be produced, which is difficult to achieve with other production processes. High-density polyethylene (HDPE) not only guarantees the product molding process and product quality due to its excellent melting and welding performance, but also provides a variety of reliable methods for construction connection, such as electric hot melting welding, heat shrink connection, etc. At the same time, this is also an important reason why leakage rarely occurs. It is also for this reason that this pipe has a unique environmental protection function that other pipes do not have, which provides a very effective method for pollution prevention and control that people are currently concerned about.

[0003] During the winding process of HDPE winding structure B type pipe, the HDPE raw material on the preheated steel round roller mold is heated and softened. Gas is used as fuel, which is ignited in the flame spray gun or spray gun to generate flame to heat and soften the HDPE raw material. In this process, the uniformity of the gas is crucial to the molding quality of the pipe. Uneven gas will cause the following problems:

[0004] 1. The combustion temperature fluctuates greatly, and the pipe is heated unevenly, which easily forms cold spots or overheated areas during the molding process, affecting the uniformity of the wall thickness of the pipe, thereby causing defects such as wrinkles, depressions or uneven strength, and even causing the product to be scrapped in severe cases;

[0005] 2. Temperature instability directly affects the melting state and solidification process of plastic materials, which may lead to uneven stress distribution inside the material and affect the physical properties of the final product, such as compressive strength, impact resistance and service life;

[0006] 3. Due to incomplete combustion, energy utilization is low, which increases production costs;

[0007] 4. Unstable combustion. Unstable flames can easily lead to premature aging and damage of the spray gun or spray tube and surrounding equipment, increasing the frequency and cost of maintenance and replacement of parts.

[0008] The prior art mainly uses the following two methods of gas combustion:

[0009] 1. Directly using natural gas as fuel gas, the combustion temperature of the fuel gas is high, the combustion is relatively uniform but not sufficient, and there is a problem of high cost;

[0010] 2. Use a mixture of air and natural gas as fuel gas. The fuel gas combustion temperature is higher, the combustion is more uniform and complete, and the production cost is lower.

[0011] In the HDPE winding process, the combustion temperature of the gas is only about 130-150℃. In comparison, using a mixture of air and natural gas as the fuel gas has greater advantages. However, how to make the mixture ratio of air and natural gas in the mixture of air and natural gas be at the best ratio, make the combustion temperature at about 130-150℃, and make the mixture of air and natural gas burn fully, evenly and stably, which requires reasonable adjustment and control of the mixture of air and natural gas. Summary of the invention

[0012] The utility model aims to solve the deficiencies of the prior art and to provide a gas control system with a B-type tube of a winding structure.

[0013] In order to achieve the above object, the utility model provides the following technical solutions:

[0014] A gas control system for a winding B-type tube structure is composed of an air control system, a natural gas control system, a microcomputer control system, a premixing device, a first gas outlet pipe and a second gas outlet pipe.

[0015] The air control system is composed of an air filter purification tank, a first air intake ball valve, a first control regulating valve, a first gas flow meter and an air intake pipe. The air intake pipe starts from the air filter purification tank and is connected to the first air intake ball valve, the first control regulating valve, the first gas flow meter and the premixing device in sequence. The air filter purification tank is a cylindrical tank body, which is connected to the air intake pipe by a metal sleeve and is arranged at the front end of the air control system; the upper part of the first air intake ball valve is a "T"-shaped valve switch, which is exposed to the outside of the air intake pipe, and the lower part of the first air intake ball valve is a ball head with a circular straight through hole, which is located inside the air intake pipe; the first control regulating valve is an electric control regulating valve, which is arranged inside the air intake pipe and is electrically connected to the microcomputer control system; one end of the first gas flow meter is inserted into the inside of the air intake pipe, and the other end is exposed to the outside of the air intake pipe and is electrically connected to the microcomputer control system.

[0016] The natural gas control system is composed of a pressure gauge, a second inlet ball valve, a second control regulating valve, a second gas flow meter and a natural gas inlet pipeline. The natural gas inlet pipeline starts from the pressure gauge and sequentially connects the second inlet ball valve, the second control regulating valve, the second gas flow meter and the premixing device. The upper part of the pressure gauge is a circular pressure indicator plate, and the lower part of the pressure gauge is connected to the natural gas inlet pipeline by a thread, and is arranged at the front end of the natural gas control system; the upper part of the second inlet ball valve is a "T"-shaped valve switch, which is exposed to the outside of the natural gas inlet pipeline, and the lower part of the second inlet ball valve is a ball head with a circular straight-through hole, which is located inside the natural gas inlet pipeline; the second control regulating valve is an electric control regulating valve, which is arranged inside the natural gas inlet pipeline and is electrically connected to the microcomputer control system; one end of the second gas flow meter is inserted into the inside of the natural gas inlet pipeline, and the other end is exposed to the outside of the natural gas inlet pipeline, and is electrically connected to the microcomputer control system.

[0017] The microcomputer control system and the premixing device are both located inside the gas control system. The front end of the premixing device is an air intake pipe and a natural gas intake pipe, and the rear end of the premixing device is a first outlet pipe and a second outlet pipe.

[0018] Preferably, the air filtration purification tank contains multiple layers of filter screens, which are, from top to bottom, a pre-filter screen, a HEPA filter screen, and an activated carbon filter screen.

[0019] Preferably, the upper "T"-shaped valve switches of the first and second air inlet ball valves are rotatable structures, and the circular straight through holes of the lower ball heads can respectively connect with the air intake pipe and the natural gas intake pipe to change from blocked to half-blocked to fully-blocked, and then to half-blocked as they rotate.

[0020] Preferably, the premixing device contains 4 or 6 stirring blades evenly and symmetrically distributed along the center, and the angle between adjacent stirring blades is 90° or 60°.

[0021] Preferably, the first gas outlet pipe and the second gas outlet pipe are gas pipelines with good sealing properties, and are connected to the premixing device by metal ferrule type.

[0022] Preferably, the microcomputer control system simultaneously adjusts and controls the first control regulating valve and the second control regulating valve.

[0023] The beneficial effects of the utility model are:

[0024] By adopting the above technical solution, the microcomputer control system simultaneously adjusts and controls the first control regulating valve and the second control regulating valve to make the mixing ratio of air and natural gas at the optimal ratio, so as to achieve full, uniform and stable combustion of the mixed gas of air and natural gas, improve combustion efficiency and reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0026] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0027] Figure 1 This is a structural schematic diagram of a gas control system of a winding structure B-type tube proposed by the utility model.

[0028] Figure 1 Shown in: 1. air control system, 2. natural gas control system, 3. microcomputer control system, 4. premixing device, 5. first air outlet pipe, 6. second air outlet pipe, 11. air filter purification tank, 12. first air inlet ball valve, 13. first control regulating valve, 14. first gas flow meter, 15. air inlet pipeline, 21. pressure gauge, 22. second air inlet ball valve, 23. second control regulating valve, 24. second gas flow meter, 25. natural gas inlet pipeline. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The terms such as "upper", "lower", "left", "right", etc. cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0031] Reference Figure 1The utility model discloses a gas control system of a winding structure B-type tube, including an air control system 1, a natural gas control system 2, a microcomputer control system 3, a premixing device 4, a first air outlet pipe 5, a second air outlet pipe 6, an air filter purification tank 11, a first inlet ball valve 12, a first control regulating valve 13, a first gas flow meter 14, an air intake pipeline 15, a pressure gauge 21, a second inlet ball valve 22, a second control regulating valve 23, a second gas flow meter 24 and a natural gas intake pipeline 25.

[0032] The working process of Example 1 is as follows:

[0033] Air control system 1: The air enters the air filter purification tank 11, and passes through the pre-filter, HEPA filter, and activated carbon filter from top to bottom. The moisture, particulate matter and other impurities in the air are adsorbed in the filter. The purified air can pass through the first inlet ball valve 12, the first control regulating valve 13, and the first gas flow meter 14 along the air intake pipe 15 to reach the premixing device 4. When the purified air reaches the first inlet ball valve 12, the upper "T"-shaped valve switch of the first inlet ball valve 12 can be rotated to the state where the circular straight-through hole of the lower ball head and the air intake pipe 15 are fully connected, so that the purified air directly passes through the first inlet ball valve 12 and reaches the first control regulating valve 13. The microcomputer control system 3 controls and adjusts the first control regulating valve 13 to make the purified air passing through meet the conditions of the best ratio. After passing through the first control regulating valve 13, the purified air reaches the first gas flow meter 14, and its flow is monitored in real time by the first gas flow meter 14, and the flow data is transmitted to the microcomputer control system 3, which controls and adjusts the first control regulating valve 13 in real time to control the purified air passing through to meet the conditions of the optimal ratio. The purified air passing through then reaches the premixing device 4.

[0034] Natural gas control system 2: Natural gas passes through the pressure gauge 21, the second inlet ball valve 22, the second control regulating valve 23, and the second gas flow meter 24 along the natural gas inlet pipeline 25 to reach the premixing device 4. The natural gas first passes through the pressure gauge 21, which is used to help maintain the gas pressure in the pipeline system stable so that the system can operate normally; then reaches the second inlet ball valve 22, and the upper "T"-shaped valve switch of the second inlet ball valve 22 can be rotated to the state where the circular straight-through hole of the lower ball head and the natural gas inlet pipeline 25 are fully connected, so that the natural gas directly passes through the second inlet ball valve 22 and reaches the second control regulating valve 23. The microcomputer control system 3 controls and adjusts the second control regulating valve 23 to make the natural gas passing through meet the conditions of the best ratio. After passing through the second control regulating valve 23, the natural gas reaches the second gas flow meter 24, and its flow is monitored in real time by the second gas flow meter 24, and the flow data is transmitted to the microcomputer control system 3, which controls and adjusts the second control regulating valve 23 in real time to control the natural gas passing through to meet the conditions of the best ratio. The natural gas then passes through the premixing device 4 .

[0035] In this embodiment 1, the microcomputer control system 3 simultaneously adjusts and controls the first control regulating valve 13 of the air control system 1 and the second control regulating valve 23 of the natural gas control system 2, so that the ratio of air to natural gas is 55%:45%. The air and natural gas enter the premixing device 4, and are fully stirred and mixed by the stirring blades in the premixing device 4, and the mixed gas then flows out from the first outlet pipe 5 and the second outlet pipe 6.

[0036] Embodiment 2:

[0037] Based on Example 1, except that the microcomputer control system 3 simultaneously controls the first control regulating valve 13 of the air control system 1 and the second control regulating valve 23 of the natural gas control system 2, and the ratio of air to natural gas is 50%:50%, the rest is consistent with Example 1.

[0038] Embodiment 3:

[0039] Based on Example 1, except that the microcomputer control system 3 simultaneously controls the first control regulating valve 13 of the air control system 1 and the second control regulating valve 23 of the natural gas control system 2, and the ratio of air to natural gas is 45%:55%, the rest is consistent with Example 1.

[0040] Embodiment 4:

[0041] Based on Example 1, except that the air control system 1 is closed and the flow ratio of air and natural gas is set to 0%:100%, the rest is consistent with Example 1.

[0042] The mixed gas in the above embodiment continues to enter the subsequent spray gun or spray barrel to be ignited and burned. The combustion temperature of the mixed gas can be known by measuring the temperature at the outlet of the spray gun or spray barrel. The degree of combustion of the gas can also be judged by observing the color of the flame at the outlet of the spray gun or spray barrel. At the same time, taking 12 hours of work per day as the calculation unit, the daily natural gas consumption can be counted to calculate the production cost.

[0043] The results of gas combustion with different air and natural gas ratios are shown in Table 1. As can be seen from Table 1, the combustion temperature of Example 1 is 140°C, which meets the requirement of 130-150°C, the color is pure blue, the combustion is the most complete, and the daily natural gas consumption is only 100 cubic meters, which is the least, compared with the daily natural gas consumption of Example 4 which only uses natural gas, it saves 33%. Therefore, the flow ratio of air and natural gas in Example 1 is 55%:45%, which is the best ratio in this embodiment.

[0044] Table 1 Comparison of results of different air and natural gas ratios

[0045]

[0046] Of course, the embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A gas control system with a winding structure B-type tube, characterized in that: It is composed of an air control system (1), a natural gas control system (2), a microcomputer control system (3), a premixing device (4), a first air outlet pipe (5) and a second air outlet pipe (6); The air control system (1) is composed of an air filter purification tank (11), a first air inlet ball valve (12), a first control regulating valve (13), a first gas flow meter (14) and an air inlet pipe (15); the air inlet pipe (15) starts from the air filter purification tank (11) and is connected to the first air inlet ball valve (12), the first control regulating valve (13), the first gas flow meter (14) and the premixing device (4) in sequence; the air filter purification tank (11) is a cylindrical tank body, which is connected to the air inlet pipe (15) by a metal ferrule type, and is arranged at the front end of the air control system (1); The upper part of the first air intake ball valve (12) is a "T"-shaped valve switch, which is exposed outside the air intake pipe (15); the lower part of the first air intake ball valve (12) is a ball head with a circular straight through hole, which is located inside the air intake pipe (15); the first control regulating valve (13) is an electric control regulating valve, which is arranged inside the air intake pipe (15) and is electrically connected to the microcomputer control system (3); one end of the first gas flow meter (14) is inserted into the air intake pipe (15), and the other end is exposed outside the air intake pipe (15) and is electrically connected to the microcomputer control system (3); The natural gas control system (2) is composed of a pressure gauge (21), a second inlet ball valve (22), a second control regulating valve (23), a second gas flow meter (24) and a natural gas inlet pipeline (25); the natural gas inlet pipeline (25) starts from the pressure gauge (21) and is connected to the second inlet ball valve (22), the second control regulating valve (23), the second gas flow meter (24) and the premixing device (4) in sequence; the upper part of the pressure gauge (21) is a circular air pressure indicator plate, and the lower part of the pressure gauge (21) is connected to the natural gas inlet pipeline (25) by a threaded connection, and is arranged at the front end of the natural gas control system (2); The upper part of the second inlet ball valve (22) is a "T"-shaped valve switch, which is exposed outside the natural gas inlet pipeline (25); the lower part of the second inlet ball valve (22) is a ball head with a circular straight through hole, which is located inside the natural gas inlet pipeline (25); the second control regulating valve (23) is an electric control regulating valve, which is arranged inside the natural gas inlet pipeline (25) and is electrically connected to the microcomputer control system (3); one end of the second gas flow meter (24) is inserted into the natural gas inlet pipeline (25), and the other end is exposed outside the natural gas inlet pipeline (25) and is electrically connected to the microcomputer control system (3); The microcomputer control system (3) and the premixing device (4) are both located inside the gas control system; the front end of the premixing device (4) is an air intake pipe (15) and a natural gas intake pipe (25); the rear end of the premixing device (4) is a first outlet pipe (5) and a second outlet pipe (6).

2. A gas control system for a winding structure B-type tube according to claim 1, characterized in that: The air filter purification tank (11) contains multiple layers of filter screens, which are a pre-filter screen, a HEPA filter screen, and an activated carbon filter screen from top to bottom.

3. A gas control system for a winding structure B-type tube according to claim 1, characterized in that: The upper "T"-shaped valve switches of the first air intake ball valve (12) and the second air intake ball valve (22) are rotatable structures, and the circular straight through holes of the lower ball heads respectively realize a state from blocked to half-blocked to fully-blocked, and then to half-blocked to blocked states with the air intake pipe (15) and the natural gas intake pipe (25) as they rotate.

4. A gas control system for a winding structure B-type tube according to claim 1, characterized in that: The premixing device (4) contains 4 or 6 stirring blades evenly and symmetrically distributed along the center, and the angle between adjacent stirring blades is 90° or 60°.

5. A gas control system for a winding structure B-type tube according to claim 1, characterized in that: The first gas outlet pipe (5) and the second gas outlet pipe (6) are gas pipelines with good sealing properties, and are connected to the premixing device (4) by metal ferrule.

6. A gas control system for a winding structure B-type tube according to claim 1, characterized in that: The microcomputer control system (3) simultaneously adjusts and controls the first control regulating valve (13) and the second control regulating valve (23).

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