Steam generator capable of automatically adjusting liquid level

Abstract

The invention discloses a steam generator capable of automatically adjusting the liquid level, and relates to the technical field of industrial steam generators. The steam generator comprises a distance measuring sensor used for measuring the liquid level height in the steam generator in real time; the upper collecting box and the lower collecting box are both in a circular truncated cone shape, and the inner wall of the upper collecting box and the inner wall of the lower collecting box are both connected with coiling strips; the upper plug and the lower plug are both in a circular truncated cone shape, and circular grooves are formed in the side face of the lower portion of the upper plug and the side face of the lower portion of the lower plug and connected with plug pieces. A floating plate is slidably connected into the second cylinder. According to the automatic liquid level adjusting device, the liquid level height can be automatically adjusted by controlling opening and closing of the electromagnetic valve, the whole device is simple in structure and multipurpose, and the liquid level height of the steam generator in the working period can be conveniently adjusted; a simple buoyancy linkage structure is adopted as a whole, electrical assemblies are reduced, the cost is low, and the structural stability is high.

Description

Technical Field

[0001] The present invention relates to the technical field of industrial steam generators, and particularly relates to a steam generator capable of automatically adjusting the liquid level. Background Art

[0002] A steam generator is a device that uses the heat of water to generate steam and is widely used in industrial production processes such as chemical industry, textile, and food. The liquid level is an important factor affecting the stable operation and safety of the steam generator.

[0003] In the known prior art, when the liquid level in the steam generator changes, the liquid level sensor will detect this change and convert it into an electrical signal. After receiving this signal, the controller will compare it with the preset liquid level. If the actual liquid level is higher than the set liquid level, the controller will send a signal to cause the actuator to reduce the opening of the inlet valve or lower the rotational speed of the feed pump; if the actual liquid level is lower than the set liquid level, the actuator will increase the opening of the inlet valve or raise the rotational speed of the feed pump. Through this feedback control mechanism, the liquid level in the steam generator can be maintained within the preset range.

[0004] However, the opening of the inlet pipe or drain pipe valve and the water output per unit time both require a complete set of electromechanical structures for control and division of labor. During the opening and closing and use of the steam generator, the liquid level often changes. The current water level control mechanism has a complex structure and high cost for realizing functions. Especially when the liquid level change is not drastic and within the controllable range, only simple regulation of the liquid level height is required. However, there is currently no simple device that can simultaneously solve the two problems of too high and too low liquid levels. Summary of the Invention

[0005] In view of the deficiencies of the prior art, the present invention provides a steam generator capable of automatically adjusting the liquid level to solve the above problems.

[0006] Technical Solution: To achieve the above objectives, the present invention is realized through the following technical solutions: A steam generator capable of automatically adjusting the liquid level, comprising: a ranging sensor for measuring the liquid level height in the steam generator in real time, the ranging sensor being electrically connected to a controller, and the controller being electrically connected to a solenoid valve.

[0007] A first cylinder, the side of the first cylinder being connected to the solenoid valve in communication, the top of the first cylinder being connected to a steam outlet pipe through an upper header, the bottom of the first cylinder being connected to a liquid inlet pipe through a lower header, both the upper header and the lower header being frustum-shaped, the upper header and the lower header being symmetrically distributed on the upper and lower sides of the first cylinder, and a ring strip being connected to the lower part of the inner wall of the upper header and the lower part of the inner wall of the lower header.

[0008] Upper plug, the upper plug is arranged inside the first cylinder body, the bottom of the upper plug is connected with a lower plug through a rod body, both the upper plug and the lower plug are frustum-shaped, circular grooves are formed on the side surfaces of the lower parts of the upper plug and the lower plug, and the circular grooves are connected with plug pieces.

[0009] Second cylinder body, the first cylinder body is communicated with the second cylinder body through a connecting pipe, a floating plate is slidably connected inside the second cylinder body, the floating plate is connected with the rod body through a connecting plate, and the floating plate drives the rod body to move along the longitudinal axis direction of the first cylinder body through buoyancy.

[0010] The upper plug is arranged to adjust the opening area of the liquid inlet pipe or seal the liquid inlet pipe under the drive of the rod body, and the lower plug is arranged to adjust the opening area of the liquid outlet pipe or seal the liquid outlet pipe under the drive of the rod body.

[0011] Preferably, the distance measuring sensor is electrically connected with a controller through a first wire, the controller is electrically connected with a solenoid valve through a second wire, the bottom of the steam generator is connected with a bottom plate, the top of the bottom plate is connected with the bottom of the controller through a support plate, a very low water level warning line, a low water level warning line, a standard water level line, a high water level warning line and an extremely high water level warning line are arranged inside the steam generator, the standard water level is arranged between the low water level warning line and the high water level warning line, the high water level warning line is located above the low water level warning line, and when the liquid level of the steam generator exceeds the high water level warning line or is lower than the low water level warning line, the controller controls the solenoid valve to open.

[0012] Preferably, a pipe orifice is formed on the side surface of the pipe body, one side of the pipe orifice far away from the axis of the pipe body is communicated with one side of the solenoid valve close to the axis of the pipe body, a first slit is formed through the middle of the side surface of the pipe body, the first slit is communicated with a connecting pipe, and the pipe orifice and the first slit are distributed on both sides of the longitudinal axis of the pipe body.

[0013] Preferably, one circular groove divides the upper plug into a first upper frustum and a first lower frustum, the diameter of the bottom of the first upper frustum is larger than the diameter of the top of the upper header, the other circular groove divides the lower plug into a second upper frustum and a second lower frustum, and the diameter of the top of the second lower frustum is larger than the diameter of the bottom of the lower header.

[0014] Preferably, the upper plug and the lower plug are symmetrically distributed according to the transverse axis of the rod body, the plug piece is annular, the inner diameter of the plug piece is smaller than the inner diameter of the lap bar, and the outer diameter of the plug piece is larger than the outer diameter of the lap bar.

[0015] Preferably, a second slit is formed through the side surface of the second cylinder body, the first slit is communicated with the second slit through a connecting pipe, a first water storage pipe is communicated with the top of the second cylinder body, a second water storage pipe is communicated with the bottom of the second cylinder body, a limiting rod is connected to the top wall of the second cylinder body through a fixing strip, a floating plate is arranged in the second cylinder body, a top plate is connected to the top of the floating plate, a circular hole is formed through the center of the top plate and the center of the floating plate, a cavity is arranged between the top plate and the floating plate, a sleeve is arranged in the cavity, one end of the sleeve is connected to the inner wall of the circular hole on the top plate, the other end of the sleeve is connected to the inner wall of the circular hole on the floating plate, the sleeve is slidably connected with the limiting rod, a baffle is connected to the bottom of the limiting rod, and the diameter of the baffle is larger than that of the sleeve.

[0016] Preferably, the floating plate is a bowl-shaped plate, the diameters of the first water storage pipe and the second water storage pipe are equal, the diameter of the second cylinder body is larger than that of the first water storage pipe, and the inner diameter of the second cylinder body is equal to the diameter of the top plate.

[0017] Preferably, when the liquid level height of the steam generator reaches the standard water level line, the top of the floating plate abuts against the top wall of the second cylinder body, the upper plug is plugged with the upper header, and the ring strip on the inner wall of the upper header abuts against the plug piece; when the liquid level height of the steam generator is lower than the low water level warning line, the bottom of the floating plate abuts against the bottom wall of the second cylinder body, the lower plug is plugged with the lower header, and the ring strip on the inner wall of the lower header abuts against the plug piece.

[0018] Preferably, a plurality of round tubes are installed in the chamber at the lower part of the steam generator, the inner diameter of each round tube is 20-30 mm, the thickness of each round tube is 5-8 mm, a plurality of outer fins are connected to the side surface of each round tube, and the plurality of outer fins are evenly distributed in the circumferential direction of the round tube. A plurality of inner fins are connected to the inner wall of each round tube, the length of each inner fin is one third of the length of the round tube, and the inner fins are arranged at the top end of the round tube.

[0019] Preferably, the round tubes, the upper header, the lower header, the outer fins and the inner fins are integrally formed into an evaporation tube. The evaporation tube is made of aluminum alloy and is manufactured by an integrated die-casting process.

[0020] Beneficial effects: The present invention provides a steam generator with automatically adjustable liquid level. Compared with the prior art, it has the following beneficial effects: 1. During the use of the steam generator, when it is necessary to finely adjust the liquid level height of the steam generator to the height of the standard water level line, only the opening and closing of the electromagnetic valve need to be controlled, and the adjustment of the liquid level height of the steam generator, the liquid level height of the first cylinder, and the liquid level height in the second cylinder can be automatically completed. The entire water level adjustment device has a simple structure and can be used in multiple functions. It can not only reduce the liquid level height of the steam generator but also increase the liquid level height of the steam generator. The overall uses a simple buoyancy linkage structure, reduces electrical components, has a low cost, and strong structural stability, which is suitable for mass production.

[0021] 2. The ranging sensor is used to measure the liquid level height in the steam generator in real time, draw a line graph based on the liquid level height information, and estimate the trend of the liquid level height change. If the range of the liquid level change is small and the duration is long, the electromagnetic valve can be opened at this time for adjustment. If the range of the liquid level change is large and the duration is long, it is necessary to quickly adjust the liquid level height of the steam generator by opening and closing the main pipeline. After the liquid level height in the steam generator approaches the standard water level line, after closing the main pipeline, the liquid level height of the steam generator is finely adjusted by opening and closing the electromagnetic valve and the liquid level height of the steam generator reaches the height of the standard water level line.

[0022] 3. When the liquid level of the steam generator is higher than the high water level warning line, the electromagnetic valve is opened, the buoyancy force received by the floating plate increases, the lower plug is pulled out from the lower header, and the water in the steam generator flows out through the first cylinder, the lower header, and the liquid outlet pipe until the liquid level height in the steam generator drops to the height of the standard water level line. When the liquid level of the steam generator is higher than the low water level warning line, the electromagnetic valve is opened, the liquid level in the second cylinder decreases, the upper plug descends and is pulled out from the upper header, and the liquid flows into the second cylinder and the steam generator from the liquid inlet pipe until the liquid level height of the steam generator rises to the height of the standard water level line.

[0023] 4. When the upper plug penetrates upward from the liquid inlet at the top of the upper header, the amount of liquid flowing into the steam generator per unit time is large. As the upper plug continues to move, the cross-sectional area for liquid flow at the top of the upper header decreases, and the amount of liquid flowing into the first cylinder per unit time is automatically adjusted through the change of the liquid level in the second cylinder. When the lower plug penetrates downward from the liquid outlet at the bottom of the lower header, initially, there is excess liquid in the steam generator, the opening of the lower header is large, and the amount of liquid flowing out of the steam generator per unit time is large. As the lower plug continues to move, the cross-sectional area for liquid flow at the top of the lower header decreases. Brief Description of the Drawings

[0024] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present application and, together with the specification, are further used to explain the principles of the present application and enable those skilled in the relevant art to implement and use the present application.

[0025] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the present invention.

[0027] Figure 2 For Figure 1 It is a front view cross-sectional perspective view of the lower part on the side of the steam generator in

[0028] Figure 3 For Figure 1 It is a schematic structural diagram after removing the bottom plate, steam generator, and support plate.

[0029] Figure 4 It is a schematic structural diagram of the part where the cylinder body is located and the part where the cylinder body is located.

[0030] Figure 5 It is a separation diagram of the part where the cylinder body is located and the part where the cylinder body is located.

[0031] Figure 6 It is an exploded view of the part where the cylinder body is located.

[0032] Figure 7 It is a separation diagram of the upper plug and the plug piece.

[0033] Figure 8 It is a schematic structural diagram of the upper plug and the upper header.

[0034] Figure 9 It is a separation diagram of the upper header and the coiler.

[0035] Figure 10 It is an exploded view of the part where the cylinder body is located.

[0036] Figure 11 It is a schematic structural diagram of the part where the floating plate and the limiting rod are located.

[0037] Figure 12 It is a schematic structural diagram of the lower part of the steam generator and the part where the ranging sensor is located.

[0038] Figure 13 It is a schematic structural diagram of the part where the round tube is located.

[0039] The reference numerals in the figure are: 11, bottom plate; 12, support plate; 13, steam generator; 21, ranging sensor; 22, first wire; 23, controller; 24, second wire; 25, solenoid valve; 31, first cylinder; 32, upper header; 33, liquid inlet pipe; 34, lower header; 35, liquid outlet pipe; 36, first opening; 37, connecting pipe; 38, pipe orifice; 39, coiling strip; 41, upper plug; 42, circular groove; 43, plug piece; 44, rod body; 45, connecting plate; 46, lower plug; 51, second cylinder; 52, second opening; 53, first water storage pipe; 54, second water storage; 55, fixing strip; 56, limiting rod; 57, floating plate; 58, top plate; 59, baffle; 6, round hole; 7, sleeve; 81, round pipe; 82, outer fin; 83, inner fin.

[0040] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the appended claims. Detailed implementation manners

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.

[0042] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the specification drawings and specific implementation manners.

[0043] Refer to Figure 1 - Figure 13 , a steam generator with automatically adjustable liquid level, comprising: a ranging sensor 21 for measuring the liquid level height in the steam generator 13 in real time, the ranging sensor 21 is electrically connected to a controller 23 through a first wire 22, and the controller 23 is electrically connected to a solenoid valve 25 through a second wire 24.

[0044] The steam generator 13 consists of a lower water tank, several pipes, and an upper water tank. Both ends of each pipe are respectively connected to the sides of the lower water tank and the upper water tank that are close to each other. A number of fins can be arranged inside each pipe. The fins are used to fully guide the heat of the pipe wall into the interior of the pipe, so that the water vapor in the center of the pipe and the water vapor near the inner wall of the pipe are basically equally heated, and its heat is homogenized. Therefore, a spiral condenser can be not designed and directly output to the outside, which can simplify the device and save costs. The pipe and the fin structure inside the pipe can be integrally formed by a casting process.

[0045] The ranging sensor 21 is a high-temperature and high-pressure resistant ranging sensor 21. The ranging sensor 21 mainly uses technical principles such as infrared laser or ultrasonic wave for measurement. It measures the distance by emitting infrared laser or ultrasonic wave signals to the target object and receiving the reflected signals. The sensor internally contains a high-temperature resistant optical component and an electronic circuit, and these components can maintain stable operation in a high-temperature environment.

[0046] The ranging sensor 21 is used to measure the liquid level height in the steam generator 13 in real time, draw a line chart based on the liquid level height information, and estimate the trend of the liquid level height change. If the range of the liquid level change is small and the duration is long (the range standard and duration can be adjusted according to the actual usage situation. The conventional standard is: the liquid level height change within half an hour is not more than 1.5 cm, and on this basis, the time for the liquid level to change is expected to be not less than 4 hours), it can be adjusted by opening and closing the solenoid valve 25. If the range of the liquid level change is large and the duration is long, it is necessary to quickly regulate the liquid level height of the steam generator 13 by opening and closing the main pipeline (not shown, the main pipeline includes: the main inlet pipe, the main outlet pipe). After the liquid level height in the steam generator 13 is close to the standard water level line, after closing the main pipeline, the liquid level height of the steam generator 13 is finely adjusted by opening and closing the solenoid valve 25 and the liquid level height of the steam generator 13 reaches the height of the standard water level line.

[0047] The first cylinder body 31, the side of the first cylinder body 31 is connected to the solenoid valve 25. The top of the first cylinder body 31 is connected with a liquid inlet pipe 33 through an upper header 32, and the bottom of the first cylinder body 31 is connected with a liquid outlet pipe 35 through a lower header 34. Both the upper header 32 and the lower header 34 are frustum-shaped, and the upper header 32 and the lower header 34 are symmetrically distributed on both sides of the transverse axis of the first cylinder body 31. The lower parts of the inner walls of the upper header 32 and the lower header 34 are both connected with ring strips 39.

[0048] When the liquid level of the steam generator 13 approaches the standard water level line, stop injecting water into the steam generator 13, and judge the relationship between the liquid level of the steam generator 13 and the standard water level line. When the liquid level of the steam generator 13 is higher than the standard water level line, it indicates that there is too much liquid in the steam generator 13. Open the first valve and close the second valve, and open the solenoid valve 25. The water level in the first cylinder 31 rises as the water level in the steam generator 13 rises.

[0049] A first valve (not shown) may be provided at the top of the liquid inlet pipe 33. When the valve is opened, water flows into the first cylinder 31 through the liquid inlet pipe 33; a second valve (not shown) may also be provided at the bottom of the liquid outlet pipe 35. When the second valve is opened, the water in the first cylinder 31 flows out through the liquid outlet pipe 35. The controller 23 can be electrically connected to the first valve and the second valve respectively. By adding the first valve and the second valve, the flexibility of liquid level height adjustment can be increased.

[0050] The diameter of the first cylinder 31 is equal to the diameter of the second cylinder 51, the diameter of the first cylinder 31 is equal to the diameter of the liquid inlet pipe 33, the diameter of the first cylinder 31 is equal to the diameter of the liquid outlet pipe 35, the diameter of the first cylinder 31 is smaller than the diameter of the main pipeline (main liquid inlet pipe and main liquid outlet pipe), and both the liquid outlet pipe 35 and the liquid inlet pipe 33 are auxiliary pipelines. The diameter of the liquid inlet pipe 33 is one-twentieth to one-tenth of the diameter of the main pipeline. When it is necessary to quickly and effectively adjust the liquid level height of the steam generator 13, the main pipeline can be used; when fine adjustment is required or there is sufficient time for adjustment, the auxiliary pipeline can be used.

[0051] The upper plug 41 is arranged inside the first cylinder 31. The bottom of the upper plug 41 is connected to the lower plug 46 through a rod body 44. Both the upper plug 41 and the lower plug 46 are frustum-shaped. Circular grooves 42 are provided on the side surfaces of the lower part of the upper plug 41 and the lower part of the lower plug 46, and the circular grooves 42 are connected to the plug pieces 43.

[0052] The second cylinder 51, the first cylinder 31 is connected to the second cylinder 51 through a connecting pipe 37. A floating plate 57 is slidably connected inside the second cylinder 51. The floating plate 57 is connected to the rod body 44 through a connecting plate 45. The floating plate 57 drives the rod body 44 to move along the longitudinal axis direction of the first cylinder 31 through buoyancy.

[0053] The upper plug 41 is arranged to adjust the opening area of the liquid inlet pipe 33 or seal the liquid inlet pipe 33 under the drive of the rod body 44, and the lower plug 46 is arranged to adjust the opening area of the liquid outlet pipe 35 or seal the liquid outlet pipe 35 under the drive of the rod body 44.

[0054] The bottom of the steam generator 13 is connected to a bottom plate 11. The top of the bottom plate 11 is connected to the bottom of the controller 23 through a support plate 12. Inside the steam generator 13, there are a high water level warning line, a low water level warning line, and a standard water level line. The standard water level is set between the high water level warning line and the low water level warning line, and the high water level warning line is above the low water level warning line. When the liquid level of the steam generator 13 exceeds the high water level warning line or is lower than the low water level warning line, the controller 23 controls the solenoid valve 25 to open.

[0055] The high water level warning line is much lower than the highest water level warning line, and the distance between the high water level warning line and the standard water level line is 1.5 cm; the low water level warning line is much higher than the lowest water level warning line, and the distance between the low water level warning line and the standard water level line is 1.5 cm.

[0056] A pipe orifice 38 is formed on the side of the pipe body. One side of the pipe orifice 38 away from the axis of the pipe body is communicated with one side of the solenoid valve 25 close to the axis of the pipe body. A first opening 36 is formed through the middle of the side of the pipe body, and the first opening 36 is communicated with a connecting pipe 37. The pipe orifice 38 and the first opening 36 are distributed on both sides of the longitudinal axis of the pipe body.

[0057] A circular groove 42 divides the upper plug 41 into a first upper frustum and a first lower frustum. The diameter of the bottom of the first upper frustum is larger than the diameter of the top of the upper header 32. Another circular groove 42 divides the lower plug 46 into a second upper frustum and a second lower frustum. The diameter of the top of the second lower frustum is larger than the diameter of the bottom of the lower header 34.

[0058] The upper plug 41 and the lower plug 46 are symmetrically distributed about the transverse axis of the rod body 44. The plug piece 43 is circular ring-shaped. The inner diameter of the plug piece 43 is smaller than the inner diameter of the coil strip 39, and the outer diameter of the plug piece 43 is larger than the outer diameter of the coil strip 39.

[0059] The plug piece 43 is an elastic piece and is made of rubber material.

[0060] When the upper plug 41 approaches the liquid inlet at the top of the upper header 32, the middle of the upper surface of the plug piece 43 on the upper plug 41 contacts the coil strip 39, and the top of the plug piece 43 is recessed under pressure. When the upper plug 41 blocks the liquid inlet at the top of the upper header 32, the plug piece 43 and the coil strip 39 are tightly abutted together. The upper plug 41 seals the upper header 32 to prevent the water in the upper header 32 from flowing into the first cylinder body 31, thus forming a first blockade. The plug strip and the coil strip 39 form a sealed chamber, thus forming a second blockade to improve the sealing ability.

[0061] A second opening 52 is formed through the side surface of the second cylinder 51. The first opening 36 is communicated with the second opening 52 through a connecting pipe 37. A first water storage pipe 53 is communicated with the top of the second cylinder 51, and a second water storage pipe 54 is communicated with the bottom of the second cylinder 51. A limiting rod 56 is connected to the top wall of the second cylinder 51 through a fixing strip 55. A floating plate 57 is arranged in the second cylinder 51. A top plate 58 is connected to the top of the floating plate 57. A circular hole 6 is formed through the center of the top plate 58 and the center of the floating plate 57. A cavity is arranged between the top plate 58 and the floating plate 57. A sleeve 7 is arranged in the cavity. One end of the sleeve 7 is connected to the inner wall of the circular hole 6 on the top plate 58, and the other end of the sleeve 7 is connected to the inner wall of the circular hole 6 on the floating plate 57. The sleeve 7 is slidably connected to the limiting rod 56. A baffle 59 is connected to the bottom of the limiting rod 56. The diameter of the baffle 59 is larger than the diameter of the sleeve 7.

[0062] The axis of the limiting rod 56 is collinear with the axis of the second cylinder 51. The limiting rod 56 is slidably connected to the sleeve 7, so that the sleeve 7 and the floating plate 57 (the sleeve 7 is fixedly connected to the floating plate 57) can only move vertically along the axis of the second cylinder 51.

[0063] The floating plate 57 is a bowl-shaped plate. The diameters of the first water storage pipe 53 and the second water storage pipe 54 are equal. The diameter of the second cylinder 51 is larger than the diameter of the first water storage pipe 53. The inner diameter of the second cylinder 51 is equal to the diameter of the top plate 58. When the liquid level height of the steam generator 13 reaches the standard water level line, the top of the floating plate 57 abuts against the top wall of the second cylinder 51, the upper plug 41 is plugged into the upper header 32, and the ring strip 39 on the inner wall of the upper header 32 abuts against the plug piece 43. When the liquid level height of the steam generator 13 is lower than the low water level warning line, the bottom of the floating plate 57 abuts against the bottom of the second cylinder 51, the lower plug 46 is plugged into the lower header 34, and the ring strip 39 on the inner wall of the lower header 34 abuts against the plug piece 43.

[0064] The floating plate 57 is a bowl-shaped plate. On the premise of ensuring that the diameter of the floating plate 57 remains unchanged and the material is the same, the contact area between the bottom of the floating plate 57 and the liquid is increased, and the drainable volume of the floating plate 57 is increased.

[0065] A plurality of round tubes 81 are installed in the lower chamber of the steam generator 13. The inner diameter of each round tube 81 is 20-30 mm, the thickness of each round tube 81 is 5-8 mm. A plurality of outer fins 82 are connected to the side surface of each round tube 81. The plurality of outer fins 82 are equidistantly distributed along the circumferential direction of the round tube 81. A plurality of inner fins 83 are connected to the inner wall of each round tube 81. The length of each inner fin 83 is one-third of the length of the round tube 81. The inner fins 83 are arranged at the top end of the round tube 81. The round tubes 81, the upper headers 32, the lower headers 34, the outer fins 82 and the inner fins 83 are integrally formed into an evaporation tube. The evaporation tube is made of aluminum alloy and is formed by an integrated die-casting process.

[0066] The round tube 81, the outer fins 82, and the inner fins 83 are all made of aluminum alloy material, and the material can be silicon-magnesium aluminum alloy material - EN AC-43000 (AlSi10Mg).

[0067] The main alloying elements of EN AC-43000 (AlSi10Mg) include: Aluminum (Al): As the matrix element, the content of aluminum is the remainder, that is, except for other specially added alloying elements, the rest is aluminum.

[0068] Silicon (Si): Silicon is an important alloying element in EN AC-43000 aluminum alloy. Its addition can refine the grains of the alloy, improve the fluidity of the metal, and thus improve the casting performance. At the same time, silicon can also form a strengthening phase Mg2Si with magnesium, enhancing the heat treatment strengthening effect of the alloy.

[0069] Magnesium (Mg): Magnesium is another key alloying element that acts together with silicon to form the Mg2Si strengthening phase. As the magnesium content increases, the number of Mg2Si increases, thereby increasing the tensile strength of the alloy. However, too high a magnesium content may also lead to a decrease in the plasticity of the alloy and a deterioration of the corrosion resistance.

[0070] In addition to aluminum, silicon, and magnesium, EN AC-43000 aluminum alloy may also contain some impurity elements, and the content of these elements is usually very low, and the impact on the alloy performance is relatively small.

[0071] The total volume of the steam generator 13 is less than 30 liters, reducing the water volume of the steam generator 13, not subject to special equipment supervision, and reducing administrative management costs.

[0072] Compared with the conventional steam generator 13, after reducing the water volume of the steam generator 13, the following benefits are obtained: 1. Safer. Because the energy is stored in the steam generator 13 as superheated water, with a small water volume, the energy storage of the steam generator 13 is small, and even if an explosion occurs, the affected range is small. 2. More energy-efficient. During the intermittent use of the steam generator 13, the water within the safe water volume range does not do work. Reducing the water volume can reduce the energy wasted by frequently heating this part of the water. 3. Faster pressure rise. With a small water volume and less heat-absorbing medium, the process temperature can be reached faster after ignition. 4. The equipment is more compact and suitable for use in urban workshops with narrow spaces.

[0073] In use, water is injected into the steam generator 13 through the main pipeline. The amount of water flowing into the steam generator 13 per unit time through the main pipeline is much greater than the amount of water flowing out of the liquid outlet pipe 35 per unit time. The liquid levels in the steam generator 13, the first cylinder 31, and the second cylinder 51 rise. The liquid level height in the steam generator 13 is measured in real time by the ranging sensor 21. When the liquid level in the steam generator 13 is lower than the standard water level line (the distance between the liquid level in the steam generator 13 and the standard water level line is less than 1.5 cm), at this time, the buoyancy force on the floating plate 57 is less than the gravity of the whole body where the floating plate 57 is located (the floating plate 57, the connecting plate 45, the rod body 44, the upper plug 41, and the lower plug 46 are connected as a whole). The lower plug 46 is adapted to the lower header 34, and the lower plug 46 plugs the liquid outlet of the lower header 34. The upper plug 41 does not block the liquid inlet of the upper header 32. Stop injecting water into the steam generator 13 through the main pipeline, and inject water into the first cylinder 31 and the steam generator 13 through the liquid inlet pipe 33 (auxiliary pipeline, the diameter of the liquid inlet pipe 33 is one-twentieth to one-tenth of the diameter of the main pipeline). The amount of water injected per unit time is small, which is convenient for controlling the liquid level in the steam generator 13 to rise to the standard liquid level line. When the liquid level height in the steam generator 13 reaches the standard water level line, close the solenoid valve 25. When the liquid level height in the second cylinder 51 is the same as the height of the standard water level line, the buoyancy force of the floating plate 57 is the same as the gravity of the whole body where the floating plate 57 is located; when the liquid level height in the second cylinder 51 is greater than the height of the standard water level line, the buoyancy force of the floating plate 57 is greater than the gravity of the whole body where the floating plate 57 is located. The floating plate 57 drives the lower plug 46 and the upper plug 41 to move upward in the vertical direction. The lower plug 46 is completely pulled out of the lower header 34, the top of the upper plug 41 passes through the water inlet at the top of the upper header 32, and the bottom of the lower plug 46 is far from the water outlet at the bottom of the lower header 34. At this time, the opening degree of the upper header 32 (the remaining area between the top of the upper header 32 and the upper plug 41) is greater than the opening degree of the lower header 34 (the remaining area between the top of the lower header 34 and the lower plug 46). The liquid levels in the first cylinder 31 and the second cylinder 51 rise, the buoyancy force of the floating plate 57 increases, the upper plug 41 continues to move upward and finally blocks the upper header 32. The liquid in the first cylinder 31 and the second cylinder 51 flows out through the liquid outlet pipe 35. When the liquid level height in the second cylinder 51 drops to the height of the standard water level line, the lower plug 46 blocks the lower header 34 again.

[0074] When the upper plug 41 penetrates upward through the liquid inlet at the top of the upper header 32, initially, the steam generator 13 lacks liquid. The opening of the upper header 32 is large, and the amount of liquid flowing into the steam generator 13 per unit time is large. As the upper plug 41 continues to move, the cross-sectional area for liquid flow at the top of the upper header 32 decreases, and the amount of liquid flowing into the first cylinder 31 per unit time is automatically adjusted through the change in the liquid level in the second cylinder 51. That is, the closer the liquid level of the steam generator 13 is to the standard water level line, the less liquid flows from the upper header 32 into the first cylinder 31, which is convenient for precise control to prevent excessive liquid entering the steam generator 13 due to the constant amount of liquid flowing out of the pipe orifice 38 of the upper header 32 per unit time. Similarly, when the lower plug 46 penetrates downward through the liquid outlet at the bottom of the lower header 34, initially, the steam generator 13 has excess liquid. The opening of the lower header 34 is large, and the amount of liquid flowing out of the steam generator 13 per unit time is large. As the lower plug 46 continues to move, the cross-sectional area for liquid flow at the top of the lower header 34 decreases.

[0075] The ranging sensor 21 is used to measure the liquid level height in the steam generator 13 in real time, draw a line chart based on the liquid level height information, and estimate the trend of the liquid level height change. If the change range of the liquid level is small and the duration is long (indicating that the liquid level height change of the steam generator 13 is not violent and the change is gentle, and it can be adjusted by fine-tuning), the solenoid valve 25 can be opened at this time for adjustment. If the liquid level of the steam generator 13 is higher than the high water level warning line, the solenoid valve 25 is opened, and the liquid in the steam generator 13 flows into the first cylinder 31 and the second cylinder 51. The liquid level in the second cylinder 51 rises, the buoyancy force on the floating plate 57 increases, the lower plug 46 is pulled out from the lower header 34, and the water in the steam generator 13 flows out through the first cylinder 31, the lower header 34, and the liquid outlet pipe 35 until the liquid level height in the steam generator 13 drops to the height of the standard water level line; if the liquid level of the steam generator 13 is higher than the low water level warning line, the solenoid valve 25 is opened, and the liquid in the first cylinder 31 and the second cylinder 51 flows into the steam generator 13. The liquid level in the second cylinder 51 drops, the upper plug 41 descends and is pulled out from the upper header 32, and the liquid flows from the liquid inlet pipe 33 into the second cylinder 51 and the steam generator 13 until the liquid level height of the steam generator 13 rises to the height of the standard water level line.

[0076] When the liquid level height of the steam generator 13 is finely adjusted to the height of the standard water level line, only by controlling the opening and closing of the solenoid valve 25, the adjustment of the liquid level height of the steam generator 13, the liquid level height of the first cylinder 31, and the liquid level height in the second cylinder 51 can be automatically completed. The entire water level adjustment device has a simple structure and can be used in multiple ways. It can not only lower the liquid level height of the steam generator 13 but also raise the liquid level height of the steam generator 13; the overall structure adopts a simple buoyancy linkage structure, reduces electrical components, has a low cost, strong structural stability, and is suitable for mass production.

[0077] If the range of liquid level change is large and the duration is long, it is necessary to quickly adjust the liquid level height of the steam generator 13 by opening and closing the main pipeline (not shown, the main pipeline includes: the main liquid inlet pipe and the main liquid outlet pipe). After the liquid level height in the steam generator 13 approaches the standard water level line, after closing the main pipeline, the liquid level height of the steam generator 13 is finely adjusted by opening and closing the solenoid valve 25 so that the liquid level height of the steam generator 13 reaches the height of the standard water level line.

[0078] This invention covers any alternatives, modifications, equivalent methods and solutions made within the spirit and scope of this invention. To enable the public to have a thorough understanding of this invention, specific details have been described in detail in the above preferred embodiments of this invention. However, those skilled in the art can fully understand this invention even without the description of these details. In addition, well-known methods, processes, procedures, components and circuits, etc. have not been described in detail to avoid unnecessary confusion to the essence of this invention.

[0079] The above are only the preferred embodiments of this invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of this invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of this invention.

Claims

1. A steam generator capable of automatically adjusting liquid level, characterized in that: include: A distance measuring sensor (21) is used to measure the liquid level in the steam generator (13) in real time, the distance measuring sensor (21) is electrically connected to a controller (23), and the controller (23) is electrically connected to a solenoid valve (25); A first cylinder (31), wherein a side surface of the first cylinder (31) is connected to the solenoid valve (25), the top of the first cylinder (31) is connected to a liquid inlet pipe (33) via an upper header (32), and the bottom of the first cylinder (31) is connected to a liquid outlet pipe (35) via a lower header (34), the upper header (32) and the lower header (34) are both truncated cone-shaped, the upper header (32) and the lower header (34) are symmetrically distributed on both sides of a transverse axis of the first cylinder (31), and the lower portions of the inner walls of the upper header (32) and the lower portions of the inner walls of the lower header (34) are both connected to coils (39); An upper plug (41), the upper plug (41) being arranged in the first cylinder (31), the bottom of the upper plug (41) being connected to a lower plug (46) via a rod (44), the upper plug (41) and the lower plug (46) both being truncated cone-shaped, the side surfaces of the lower parts of the upper plug (41) and the lower parts of the lower plug (46) both being provided with circular grooves (42), the circular grooves (42) being connected to plug pieces (43); a second cylinder (51), wherein the first cylinder (31) is connected to the second cylinder (51) via a connecting pipe (37), a floating plate (57) is slidably connected inside the second cylinder (51), the floating plate (57) is connected to the rod body (44) via a connecting plate (45), and the floating plate (57) moves along the longitudinal axis direction of the first cylinder (31) by the action of buoyancy with the rod body (44); The upper plug (41) is configured to adjust the opening area of ​​the liquid inlet pipe (33) or to seal the liquid inlet pipe (33) under the drive of the rod body (44), and the lower plug (46) is configured to adjust the opening area of ​​the liquid outlet pipe (35) or to seal the liquid outlet pipe (35) under the drive of the rod body (44).

2. The steam generator capable of automatically adjusting liquid level according to claim 1, characterized in that: The distance measuring sensor (21) is electrically connected to a controller (23) via a first wire (22), and the controller (23) is electrically connected to a solenoid valve (25) via a second wire (24). The bottom of the steam generator (13) is connected to a bottom plate (11), and the top of the bottom plate (11) is connected to the bottom of the controller (23) via a support plate (12). A high water level warning line, a low water level warning line, and a standard water level line are provided inside the steam generator (13). The standard water level is provided between the high water level warning line and the low water level warning line, and the high water level warning line is located above the low water level warning line. When the liquid level of the steam generator (13) exceeds the high water level warning line or is lower than the low water level warning line, the controller (23) controls the solenoid valve (25) to open.

3. The steam generator capable of automatically adjusting liquid level according to claim 1, characterized in that: A pipe opening (38) is provided on the side of the first cylinder (31), and the side of the pipe opening (38) away from the axis of the tube body is connected to the side of the solenoid valve (25) close to the axis of the tube body. A first opening (36) is provided through the middle of the side of the first cylinder (31), and the first opening (36) is connected to a connecting pipe (37). The pipe opening (38) and the first opening (36) are distributed on both sides of the longitudinal axis of the tube body.

4. The steam generator capable of automatically adjusting liquid level according to claim 1, characterized in that: One of the circular grooves (42) divides the upper plug (41) into a first upper cone and a first lower cone, the diameter of the bottom of the first upper cone being greater than the diameter of the top of the upper header (32), and the other circular groove (42) divides the lower plug (46) into a second upper cone and a second lower cone, the diameter of the top of the second lower cone being greater than the diameter of the bottom of the lower header (34).

5. The steam generator capable of automatically adjusting liquid level according to claim 1, characterized in that: The upper plug (41) and the lower plug (46) are symmetrically distributed along the transverse axis of the rod body (44); the plug piece (43) is in a circular ring shape; the inner diameter of the plug piece (43) is smaller than the inner diameter of the coil (39); and the outer diameter of the plug piece (43) is larger than the outer diameter of the coil (39).

6. The steam generator capable of automatically adjusting liquid level according to claim 3, characterized in that: A second opening (52) is formed through the side of the second cylinder (51); the first opening (36) is connected to the second opening (52) through a connecting pipe (37); the top of the second cylinder (51) is connected to a first water storage pipe (53); the bottom of the second cylinder (51) is connected to a second water storage pipe (54); the top wall of the second cylinder (51) is connected to a limiting rod (56) through a fixing strip (55); a floating plate (57) is provided inside the second cylinder (51); the top of the floating plate (57) is connected to a top plate (58); the top of the top plate (58) is connected to the top plate (59); A circular hole (6) is provided through the center of the plate (58) and the center of the floating plate (57); a cavity is provided on the top plate (58) and the floating plate (57); a sleeve (7) is provided in the cavity; one end of the sleeve (7) is connected to the inner wall of the circular hole (6) on the top plate (58); the other end of the sleeve (7) is connected to the inner wall of the circular hole (6) on the floating plate (57); the sleeve (7) is slidably connected to the limit rod (56); a baffle (59) is connected to the bottom of the limit rod (56); and the diameter of the baffle (59) is greater than the diameter of the sleeve (7).

7. The steam generator capable of automatically adjusting liquid level according to claim 6, characterized in that: The floating plate (57) is a bowl-shaped plate, the diameters of the first water storage pipe (53) and the second water storage pipe (54) are equal, the diameter of the second cylinder (51) is greater than the diameter of the first water storage pipe (53), and the inner diameter of the second cylinder (51) is equal to the diameter of the top plate (58).

8. The steam generator capable of automatically adjusting liquid level according to claim 1, characterized in that: When the liquid level of the steam generator (13) reaches the standard water level line, the top of the floating plate (57) abuts against the top wall of the second cylinder (51), the upper plug (41) is plugged against the upper header (32), and the ring strip (39) on the inner wall of the upper header (32) abuts against the plugging piece (43); when the liquid level of the steam generator (13) is lower than the low water level warning line, the bottom of the floating plate (57) abuts against the bottom of the second cylinder (51), the lower plug (46) is plugged against the lower header (34), and the ring strip (39) on the inner wall of the lower header (34) abuts against the plugging piece (43).

9. The steam generator capable of automatically adjusting liquid level according to claim 1, characterized in that: A plurality of circular tubes (81) are installed in the chamber at the lower part of the steam generator (13), the inner diameter of each circular tube (81) is 20-30 mm, the thickness of each circular tube (81) is 5-8 mm, the side of each circular tube (81) is connected to a plurality of external fins (82), the plurality of external fins (82) are equidistantly distributed in the circumferential direction of the circular tube (81), the inner wall of each circular tube (81) is connected to a plurality of internal fins (83), the length of each internal fin (83) is one third of the length of the circular tube (81), and the internal fins (83) are arranged at the top of the circular tube (81).

10. The steam generator capable of automatically adjusting liquid level according to claim 9, characterized in that: The circular tube (81), the upper header (32), the lower header (34), the outer fin (82), and the inner fin (83) are integrated to form an evaporation tube. The evaporation tube is made of aluminum alloy and adopts an integrated die-casting process.

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