Energy-saving natural gas heat-conducting oil boiler

Abstract

The utility model relates to an energy-saving natural gas heat-conducting oil boiler, and aims to solve the problems of insufficient combustion and low energy efficiency of natural gas in the prior art. The boiler comprises a heat-conducting oil furnace, an air valve assembly, a control assembly and a metering sensor. The gas valve assembly is fixed to a natural gas inlet of the heat-conducting oil furnace and controls flowing and gas inlet rate of natural gas. The gas valve assembly comprises a preheating valve cabin, a rotating wheel and a crankshaft rod, the preheating valve cabin heats natural gas through a heat-conducting oil pipeline, and the rotating wheel is matched with the crankshaft rod to achieve stable conveying of the natural gas. The control assembly controls the flow of the natural gas by adjusting friction force, and the metering sensor monitors the flow and conveying rate of the natural gas in real time. Through preheating and accurate control of natural gas, the combustion efficiency is remarkably improved, the stability of the combustion process is ensured, and the purposes of energy conservation and emission reduction are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal oil boilers, in particular to an energy-saving natural gas thermal oil boiler. Background Art

[0002] In existing natural gas thermal oil boiler systems, a combination of solenoid valves and flow meters is usually used to control the flow and intake rate of natural gas. The solenoid valve is used to open or close the flow channel of natural gas, while the flow meter is used to monitor the flow of natural gas and adjust the gas supply according to demand. However, this traditional control method has some significant defects:

[0003] Since the opening and closing action of the solenoid valve is relatively simple and extensive, the flow rate and pressure of natural gas cannot be accurately controlled. This can easily lead to unstable natural gas flow in actual operation, especially when the gas supply demand changes greatly, the pressure of natural gas fluctuates greatly, which in turn affects the combustion efficiency. Incomplete combustion not only reduces the thermal efficiency of the boiler, but may also lead to an increase in combustion products, thereby causing environmental pollution problems. Although the flow meter can measure the flow of natural gas, it responds slowly to pressure fluctuations and it is difficult to adjust the supply of natural gas in real time. This lagging control mechanism often cannot make timely adjustments when facing rapid changes in natural gas demand, resulting in unstable combustion state, further reducing the combustion efficiency of the boiler. In summary, the traditional natural gas thermal oil boiler system has problems such as unstable natural gas flow, incomplete combustion and control lag due to the control method of solenoid valves and flow meters, which restricts the improvement of the overall energy efficiency of the boiler and cannot meet the growing demand for energy conservation and emission reduction. Utility Model Content

[0004] The utility model aims to solve the technical problems existing in the prior art or related technology. To this end, the technical solution adopted by the utility model is: an energy-saving natural gas thermal oil boiler, including a thermal oil furnace, a gas valve assembly, and a control assembly and a metering sensor fixed on both sides of the gas valve assembly. The gas valve assembly is fixed at the natural gas inlet of the thermal oil furnace, and is used to control the opening and closing of the natural gas flow channel and the air intake rate. The gas valve assembly includes a preheating valve cabin, a runner and a crankshaft rod, the crankshaft rod is rotatably sleeved on the inner side of the runner, the runner is sleeved on the inner side of the preheating valve cabin, the inner side of the preheating valve cabin is elliptical, the cross section of the runner is a Leroy triangle structure and the outer periphery is slidably abutted against the inner side of the preheating valve cabin, the two sides of the preheating valve cabin are respectively provided with a liquid inlet cover plate and a reflux cover plate, the surface of the preheating valve cabin is provided with a plurality of flow channel holes connected to the inside of the liquid inlet cover plate and the reflux cover plate, and the two sides of the preheating valve cabin are respectively provided with an air inlet pipe opening and an air outlet pipe opening. The control assembly includes a control box, a friction shoe and a brake plate. The inner side of the control box is provided with a piston cavity for pushing the brake plate to move radially. The friction shoe is embedded and installed on the surface of the crankshaft rod and sleeved on the inner side of the control box. The surface of the brake plate and the surface of the friction shoe are in sliding contact. The metering sensor is fixed on one side of the return cover plate to detect the number of rotations of the crankshaft rod.

[0005] In a preferred example, the utility model can be further configured as follows: the return cover plate and the liquid inlet cover plate are both cavity structures, and the surface is provided with a port for communicating with the thermal oil pipeline of the thermal oil furnace, and the two ends of the flow channel hole are connected to the inside of the return cover plate and the liquid inlet cover plate. By adopting the above technical solution, part of the heat of the thermal oil is used to heat the natural gas inside the thermal oil furnace, so as to achieve preheating of the natural gas and improve the combustion efficiency of the natural gas.

[0006] In a preferred example, the utility model can be further configured as follows: the air inlet and air outlet on the surface of the preheating valve cabin are symmetrically arranged on both sides of the preheating valve cabin about the center of the crankshaft rod, and are used to connect the natural gas pumping pipeline and the natural gas input pipeline of the thermal oil furnace. By adopting the above technical solution, in the process of natural gas entering the preheating valve cabin, the natural gas pressure is used to drive the runner and the crankshaft rod to rotate, and the movement of the natural gas is restricted by the rotation of the runner, so that the natural gas flow is more stable, avoiding problems such as incomplete combustion caused by unstable gas pressure.

[0007] In a preferred example, the utility model can be further configured as follows: an eccentric wheel is provided inside the runner, and the center of the eccentric wheel deviates from the center of the crankshaft, and a meshing gear is fixedly sleeved on the surface of the crankshaft, and one side of the meshing gear meshes with the inner side of the eccentric wheel. By adopting the above technical solution, when the runner rotates eccentrically inside the preheating valve cabin, various cavities are formed for transporting natural gas and maintaining stable rotation of the runner.

[0008] In a preferred example, the utility model can be further configured as follows: the friction shoes are symmetrically arranged on both sides of the crankshaft and located on the inner side of the control box, and the friction shoes are located at the output end of the piston cavity and symmetrically arranged on both sides of the crankshaft. By adopting the above technical solution, the rotational friction of the crankshaft can be increased or decreased under the control of the piston cavity, so as to give a larger motion damping to the runner, thereby slowing down the natural gas delivery efficiency, or reducing the rotational friction of the crankshaft and the runner, thereby increasing the natural gas delivery efficiency.

[0009] The beneficial effects achieved by the utility model are:

[0010] 1. In the utility model, by setting the return cover plate and the liquid inlet cover plate, which are connected to the thermal oil pipeline, part of the heat of the thermal oil can be used to preheat the natural gas. This design effectively increases the temperature of the natural gas, ensuring that it reaches a higher temperature before entering the combustion chamber, thereby significantly improving the combustion efficiency and sufficiency of the natural gas. This preheating method not only reduces the consumption of natural gas, but also improves the overall thermal efficiency of the thermal oil boiler, achieving an energy-saving effect.

[0011] 2. In the utility model, the unique structural design of the runner and crankshaft in the gas valve assembly, especially the Leroy triangle cross section of the runner and the eccentric wheel meshing device, can effectively control the flow speed and pressure of natural gas when it enters the preheating valve chamber. Such a design plays a role in stabilizing the pressure during the natural gas transportation process, avoiding the problem of incomplete combustion or reduced combustion efficiency caused by unstable natural gas pressure. At the same time, this structure can also automatically adjust the flow rate when the natural gas flow changes, ensuring that the combustion process is always in the best state, improving the working stability and overall energy efficiency of the thermal oil boiler. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the utility model;

[0013] Figure 2 This is a schematic diagram of the exploded structure of a gas valve assembly according to an embodiment of the utility model;

[0014] Figure 3 This is a schematic diagram of the internal structure of a preheating valve cabin according to an embodiment of the utility model;

[0015] Figure 4 This is a schematic diagram of the structure of a rotating wheel and a crankshaft rod according to an embodiment of the utility model;

[0016] Figure 5 The figure is a schematic diagram of the internal structure of a control component according to an embodiment of the utility model.

[0017] Reference numerals:

[0018] 100. Thermal oil furnace;

[0019] 200, air valve assembly; 210, preheating valve cabin; 220, runner; 230, crankshaft rod; 211, liquid inlet cover plate; 212, return cover plate; 213, flow channel hole; 214, air inlet pipe port; 215, air outlet pipe port;

[0020] 300, control assembly; 310, control box; 320, friction shoe; 330, brake plate; 311, piston chamber; 400, metering sensor. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in combination with specific implementation methods and with reference to the accompanying drawings. It should be noted that the embodiments of the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] It should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention.

[0023] An energy-saving natural gas thermal oil boiler provided by some embodiments of the utility model is described below in conjunction with the accompanying drawings.

[0024] Implementation Method 1

[0025] like Figures 1 to 5 As shown, the utility model provides an energy-saving natural gas thermal oil boiler, including a thermal oil furnace 100, a gas valve assembly 200, a control assembly 300 and a metering sensor 400.

[0026] The gas valve assembly 200 is fixed at the natural gas inlet of the thermal oil furnace 100, and is used to control the opening and closing of the natural gas flow channel and the air intake rate. The gas valve assembly 200 includes a preheating valve chamber 210, a runner 220 and a crankshaft rod 230. Among them, the crankshaft rod 230 is rotatably sleeved on the inner side of the runner 220, and the runner 220 is sleeved on the inner side of the preheating valve chamber 210. The inner side of the preheating valve chamber 210 is designed to be elliptical, and the cross section of the runner 220 is a Leroy triangle structure, and its outer periphery is slidably abutted against the inner side of the preheating valve chamber 210, thereby ensuring that the runner 220 can rotate stably during the natural gas introduction process.

[0027] The two sides of the preheating valve cabin 210 are respectively provided with a liquid inlet cover plate 211 and a return cover plate 212, both of which are cavity structures and are connected to the thermal oil pipeline in the thermal oil furnace 100 through the ports provided on the surface. The surface of the preheating valve cabin 210 is provided with a plurality of flow channel holes 213, which are used to connect the inside of the liquid inlet cover plate 211 and the return cover plate 212, so as to realize the circulation of thermal oil and preheating of natural gas. Through this structure, part of the heat of the thermal oil is used to heat the natural gas in the preheating valve cabin 210, increase the temperature of the natural gas, and thus improve the combustion efficiency.

[0028] An air inlet 214 and an air outlet 215 are respectively provided on both sides of the preheating valve cabin 210, and they are arranged symmetrically about the center of the crankshaft rod 230. Natural gas enters the preheating valve cabin 210 through the air inlet 214, and is discharged from the air outlet 215 after preheating, and enters the thermal oil furnace 100 for combustion. In this process, the gas pressure of the natural gas drives the runner 220 and the crankshaft rod 230 to rotate. The rotation of the runner 220 limits the flow speed of the natural gas, avoiding the problem of incomplete combustion caused by unstable gas pressure.

[0029] An eccentric wheel 221 is provided inside the runner 220, and the center of the eccentric wheel 221 deviates from the center of the crankshaft 230. A meshing gear 231 is fixedly sleeved on the surface of the crankshaft 230, and the meshing gear 231 meshes with the inner side of the eccentric wheel 221, ensuring that the runner 220 forms various cavities for the transportation of natural gas during the eccentric rotation inside the preheating valve cabin 210, and maintaining the stable rotation of the runner 220.

[0030] The control assembly 300 includes a control box 310, a friction shoe 320 and a brake plate 330. A piston cavity 311 is provided inside the control box 310 for pushing the brake plate 330 to move radially. The friction shoe 320 is symmetrically arranged on both sides of the crankshaft rod 230, embedded and installed on the surface of the crankshaft rod 230, and sleeved on the inner side of the control box 310. The surface of the brake plate 330 is in sliding contact with the surface of the friction shoe 320. By controlling the piston cavity 311, the rotational friction of the crankshaft rod 230 can be increased or decreased, thereby adjusting the rotational damping of the runner 220, and realizing precise control of the natural gas delivery rate.

[0031] The metering sensor 400 is fixed to one side of the return cover plate 212, and is used to monitor the speed and number of revolutions of the crankshaft 230, thereby realizing real-time monitoring of the natural gas delivery rate and flow rate. Through the monitoring data, the supply of natural gas can be more accurately controlled to ensure that the boiler can achieve the best combustion state under different operating conditions.

[0032] Implementation Method 2

[0033] In another embodiment of the present invention, the design of the friction shoe 320 and the brake plate 330 can dynamically adjust the supply rate of natural gas according to the different working load conditions of the thermal oil furnace. Under low load conditions, the piston chamber 311 controls the brake plate 330 to apply a larger friction force to increase the rotation resistance of the crankshaft rod 230, thereby slowing down the supply rate of natural gas and reducing energy consumption; under high load conditions, the brake plate 330 reduces the friction force, allowing the crankshaft rod 230 to rotate more freely, thereby increasing the supply rate of natural gas to meet the combustion requirements of the thermal oil furnace under high load conditions.

[0034] The working principle and use process of this utility model:

[0035] The energy-saving natural gas thermal oil boiler of the utility model mainly realizes efficient control and utilization of natural gas through the coordinated action of the gas valve component 200, the control component 300 and the metering sensor 400, thereby improving the overall energy efficiency of the boiler.

[0036] Natural gas preheating and control

[0037] When natural gas enters the gas valve assembly 200 from the natural gas pipeline, it first passes through the preheating valve chamber 210. Before entering the thermal oil furnace 100, the natural gas in the preheating valve chamber 210 is heated by the thermal oil in the liquid inlet cover plate 211 and the return cover plate 212. Through the flow channel hole 213 in the preheating valve chamber, part of the heat of the thermal oil is transferred to the natural gas, which increases its temperature and thus improves the combustion efficiency. The preheated natural gas enters from the inlet pipe port 214, and the flow rate and pressure of the natural gas are stabilized through the rotation of the runner 220 and the crankshaft rod 230, and finally discharged from the outlet pipe port 215 and enters the thermal oil furnace 100 for combustion.

[0038] Natural gas flow regulation and monitoring

[0039] The runner 220 in the gas valve assembly 200 is driven to rotate by the natural gas pressure, and cooperates with the friction shoe 320 and the brake plate 330 of the control assembly 300 through the crankshaft 230 to control the flow rate of the natural gas. The piston chamber 311 controls the radial movement of the brake plate 330, increases or decreases the rotation resistance of the crankshaft 230, and thus accurately adjusts the supply of natural gas. The metering sensor 400 monitors the speed and number of rotations of the crankshaft 230 in real time, thereby monitoring the delivery rate and flow of natural gas, ensuring that the natural gas supply can be accurately adjusted according to the boiler load.

[0040] Stabilize the combustion process

[0041] Through the above structure and control method, the utility model can effectively preheat and adjust the flow of natural gas before it enters the combustion chamber, avoiding the problem of insufficient combustion caused by unstable gas pressure or insufficient temperature, and ensuring that the boiler can achieve a stable and efficient combustion state under different working conditions.

[0042] Usage Process

[0043] Start the boiler system

[0044] First, turn on the thermal oil boiler 100 and related auxiliary equipment to ensure that the boiler system is in a normal standby state. Check whether the gas valve assembly 200, the control assembly 300 and the metering sensor 400 are correctly connected and work properly.

[0045] Thermal oil circulation heating

[0046] The heat transfer oil circulation system is started, and the heat transfer oil enters through the liquid inlet cover plate 211 of the preheating valve cabin 210 and returns through the return cover plate 212 to realize the circulation heating of the heat transfer oil. The heat transfer oil transfers heat to the natural gas in the preheating valve cabin 210, and the preheating process of the natural gas begins.

[0047] Natural gas supply and regulation

[0048] The natural gas supply valve is opened, and the natural gas enters the preheating valve chamber 210 through the inlet pipe 214. After being preheated, the natural gas drives the runner 220 and the crankshaft 230 to rotate. According to the operating load of the boiler, the friction force of the brake plate 330 is adjusted through the piston chamber 311 in the control component 300 to control the rotation speed of the crankshaft 230, thereby adjusting the supply rate of the natural gas. The metering sensor 400 monitors the flow rate of the natural gas in real time to ensure stable supply.

[0049] Natural gas flaring

[0050] The preheated and stabilized natural gas is discharged from the gas outlet 215 and enters the combustion chamber of the thermal oil furnace 100 for combustion. At this time, the preheated natural gas has a higher temperature, burns more fully, and the combustion efficiency is significantly improved.

[0051] System monitoring and adjustment

[0052] During the operation of the boiler, the metering sensor 400 continuously monitors the flow and supply of natural gas. If a fluctuation in the natural gas flow is detected, the control component 300 will automatically adjust the friction of the brake plate 330 to stabilize the flow of natural gas and ensure the stability of the combustion process. The boiler operator can also manually adjust the settings of the control component 300 according to actual needs to optimize the working state of the boiler.

[0053] Stop running

[0054] When the boiler is no longer needed, close the natural gas supply valve and the thermal oil circulation system to stop the supply of natural gas and the circulation of thermal oil. Confirm that the gas valve assembly 200 and the control assembly 300 are in a safe closed state to ensure the safety of the system.

[0055] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0056] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and purpose of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. An energy-saving natural gas thermal oil boiler, characterized in that: The invention comprises a thermal oil furnace (100), a gas valve assembly (200), and a control assembly (300) and a metering sensor (400) fixed on both sides of the gas valve assembly (200). The gas valve assembly (200) is fixed at the natural gas inlet of the thermal oil furnace (100) and is used to control the opening and closing of the natural gas flow channel of the thermal oil furnace (100) and control the gas intake rate of the natural gas of the thermal oil furnace (100). The gas valve assembly (200) comprises a preheating valve cabin (21 0), a rotating wheel (220) and a crankshaft rod (230), the crankshaft rod (230) being rotatably sleeved on the inner side of the rotating wheel (220), the rotating wheel (220) being sleeved on the inner side of the preheating valve cabin (210), the inner side of the preheating valve cabin (210) being elliptical, the cross section of the rotating wheel (220) being in a Leroy triangle structure, and the outer periphery being in sliding contact with the inner side of the preheating valve cabin (210), and liquid inlet covers being respectively provided on both sides of the preheating valve cabin (210) The preheating valve cabin (210) is provided with a plurality of flow channel holes (213) which are in communication with the inside of the liquid inlet cover plate (211) and the reflux cover plate (212); the two sides of the preheating valve cabin (210) are respectively provided with an air inlet pipe port (214) and an air outlet pipe port (215); the control assembly (300) comprises a control box (310), a friction shoe (320) and a brake plate (330); the control A piston chamber (311) is provided on the inner side of the box (310) for pushing the brake plate (330) to move radially. The friction shoe (320) is embedded and installed on the surface of the crankshaft rod (230) and sleeved on the inner side of the control box (310). The surface of the brake plate (330) and the surface of the friction shoe (320) are in sliding contact. The metering sensor (400) is fixed on one side of the return cover plate (212) for detecting the number of rotations of the crankshaft rod (230).

2. The energy-saving natural gas thermal oil boiler according to claim 1 is characterized in that: The reflux cover plate (212) and the liquid inlet cover plate (211) are both hollow structures, and are provided with ports on their surfaces for communicating with the thermal oil pipeline of the thermal oil furnace (100), and both ends of the flow channel hole (213) are connected to the inside of the reflux cover plate (212) and the liquid inlet cover plate (211).

3. The energy-saving natural gas thermal oil boiler according to claim 1 is characterized in that: The air inlet (214) and the air outlet (215) on the surface of the preheating valve cabin (210) are symmetrically arranged on both sides of the preheating valve cabin (210) about the center of the crankshaft rod (230), and are used to connect the natural gas pumping pipeline and the natural gas input pipeline of the thermal oil furnace (100).

4. The energy-saving natural gas thermal oil boiler according to claim 1 is characterized in that: An eccentric wheel (221) is provided on the inner side of the rotating wheel (220), and the center of the eccentric wheel (221) deviates from the center of the crankshaft (230). A meshing gear (231) is fixedly sleeved on the surface of the crankshaft (230), and one side of the meshing gear (231) meshes with the inner side of the eccentric wheel (221).

5. The energy-saving natural gas thermal oil boiler according to claim 1 is characterized in that: The friction shoes (320) are symmetrically arranged on both sides of the crankshaft rod (230) and are located on the inner side of the control box (310). The friction shoes (320) are located at the output end of the piston chamber (311) and are symmetrically arranged on both sides of the crankshaft rod (230).

6. The energy-saving natural gas thermal oil boiler according to claim 1 is characterized in that: The metering sensor (400) is used to monitor the rotation speed and number of revolutions of the crankshaft (230), thereby monitoring the delivery rate and flow rate of natural gas.

Images