Multipurpose full-automatic steam generator

Abstract

The utility model relates to a multipurpose full-automatic steam generator. The problem of poor environmental applicability is solved. An electric heating low-pressure steam generating tank and a water tank for supplying water to the generating tank are fixedly arranged on the rectangular base in parallel; the periphery of the rectangular base is upwards provided with a wrapping and protecting box which wraps and protects the water tank, the electric heating low-pressure steam generating tank and bottom supporting legs thereof and is provided with a door; a water level gauge transversely communicated with the generation tank is arranged on one side of the wrapping and protecting box; a safety valve penetrating through the top of the wrapping and protecting box, a pressure gauge, a steam-water separator for providing low-pressure steam outwards through a pressure pipe and a valve, and a pressure controller are upwards communicated with the generation tank in parallel; the lower portion of the generating tank is provided with a plurality of sets of electric heating pipes connected with an automatic control system in parallel, and the wrapping and protecting box is provided with a control panel and a ventilation grid. The device has the advantages of remarkable reduction of heat radiation, good environmental applicability and convenience in disassembly, assembly, maintenance and control.

Description

Technical Field

[0001] The utility model relates to a steam generator, in particular to a multi-purpose full-automatic steam generator. Background Art

[0002] There is a fully automatic electric heating low-pressure steam generating device with document number CN204806355U. Figure 1-2 As shown, a vertical electric low-pressure steam generator 1 with bottom legs 11, a drain valve 10 and a heat-insulating layer and a water tank 2 for supplying water to the generator 1 are fixed in parallel on a horizontal rectangular base 12; the water outlet at the lower part of the water tank 2 is connected to a multi-stage vortex water pump M1, and the water pump M1 is further connected to the lower part of the generator 1 through a pressure water supply pipe equipped with a one-way valve 21; the lower part of the generator 1 is equipped with four groups of electric heating tubes RL1-4 and a temperature controller KP connected in parallel to the automatic control system, the middle part of the generator 1 is equipped with a sensor-type two-color water level gauge 3, and the top of the generator 1 is equipped with a safety valve 4, a pressure gauge 5, an electronic liquid level controller 6 with a probe deep under the water surface in the tank, and a steam-water separator 7 and a pressure controller 8 that provide low-pressure steam to the outside through a pressure pipe and a valve; the input end of the automatic control system is connected to the pressure controller 8, the temperature controller, the electronic liquid level controller 6 and the power supply, and the output end of the automatic control system is connected to the water pump M1 and the electric heating tubes RL1-4.

[0003] Specifically, each group of electric heating tubes RL1-4 is respectively connected to the three-phase air AC contactor QL0 of the three-phase power supply through the heating AC contactors CJ1-4 configured respectively; the main power switch K1 connected in series with the power indicator light L1 is connected to the two-phase power supply through the two-phase air AC contactor QL1; the main power switch K1 is connected to the high and medium water level control modules S1 and the low water level control module S2 and the extremely low water level control module S3 of the electronic liquid level controller 6 which are respectively connected in parallel with the power indicator light L1; the high and medium water level control switch KS1 of the high and medium water level control module S1 is connected in parallel with the water adding button switch KL, and then connected in series with the control water adding pump relay J1 which is connected in parallel with the power indicator light L2, and then connected in parallel with the power indicator light L1 to the main power switch K1; the switch end of the control water adding pump relay J1 is connected in series with the water adding pump M1, and then connected in parallel with the power indicator light L1 After the main power switch K1; the low water level control switch KS2 of the low water level control module S2 is connected in series with the low water level alarm indicator light L4 and then connected to the main power switch K1 in parallel with the power indicator light L1; the low water level control switch KS2 of the low water level control module S2 is also connected in series with the extremely low water level control switch KS3 of the extremely low water level control module S3, the pressure control switch KP of the pressure controller 8 and the temperature control switch KTL of the thermostat and multiple groups of parallel AC contactors CJ1-4 and then connected to the main power switch K1 in parallel with the power indicator light L1; the multiple groups of parallel AC contactors CJ1-4 are also connected in parallel with the heating indicator light L3; the sensor-type two-color water level gauge 3 is connected to the two-phase power supply controlled by the main power switch K1, and the high and medium water level control switch KS1 is also connected in parallel with the low water level switch controlled by the low water level sensor of the sensor-type two-color water level gauge 3.

[0004] Preferably, one of the four parallel AC contactors CJ1-4 is connected in series with a manual selection switch K2; the high and medium water level control modules S1, the low water level control module S2 and the extremely low water level control module S1 of the electronic liquid level controller 6 are respectively equipped with high and medium water level control probes, low water level control probes and extremely low water level control probes extending downward into the top of the electric heating tube CJ1-4 in the generating tank 1. The low water level switch can be further connected in series with a buzzer alarm. Specifically, the rectangular base 12 is composed of an upper bracket and a lower leg fixed downwardly on the upper bracket, and the bottom of the generating tank 1 is connected to the drain valve 10 through a drain pipe extending outward from the bottom of the upper bracket. Preferably, the bottom of the generating tank 1 is connected to the upper end of the upwardly bent drain pipe through a flange fixedly connected by standard fasteners, and the end of the drain pipe is connected to the drain valve 10 through a flange fixedly connected by standard fasteners. Specifically, a float water inlet valve is arranged on the upper part of the water tank 2, and the water inlet valve is connected to the softened water source through an inlet pipe and a stop valve. Preferably, the stop valve is connected to a softened water source through a filter. Specifically, the generating tank 1 is a pressure-resistant cylindrical tank body with a pressure-resistant spherical cap and a bottom fixedly connected to the upper and lower ends. The sensing type two-color water level gauge 3 is arranged in the front of the middle part of the tank body, and the electric heating pipe CJ1-4 is installed on the left side of the lower part of the tank body through a pressure-resistant pipe seat and a flange. The rectangular base 12 is provided with the water tank 2 on the right side of the generating tank 1. The lower water outlet of the water tank 2 is connected to the lower right side of the tank body through the water pump M1 and a pressure water supply pipe connected in series with a one-way valve 21; the pressure controller 8 is arranged on the upper rear side of the generating tank 1. Preferably, the bottom legs of the generating tank 1 are three legs distributed in an isosceles triangle, wherein the one leg at the top corner is located on the right side of the generating tank 1, and the other two legs at the bottom corner are located on the front and rear sides of the generating tank 1. More preferably, the other two lower end connecting lines are perpendicular to the horizontal axis of the rectangular base; the pressure-resistant pipe seat, flange and electric heating pipe are four sets distributed in a square in front of the lower left side of the tank body; the upper end of the sensing type two-color water level gauge 3 is connected to the front of the middle part of the tank body through an elbow, a stop valve and a flange, and the lower end of the sensing type two-color water level gauge 3 is connected to the front of the middle part of the tank body through a tee and a flange, and the tee is connected to the drain nozzle downward through the stop valve. The left side of the top of the generating tank 1 is connected to the stop valve that provides pressure steam to the outside through the water trap and the steam-water separator 7, and the electronic liquid level controller 6 with a probe deep under the water surface of the generating tank 1 is arranged on the right side of the top of the generating tank 1, and the front side of the top of the generating tank 1 is connected to the pressure gauge 5 upward through the rotary water trap, and the rear side of the top of the generating tank 1 is connected to the safety valve 4 upward. After long-term application, it was found that its environmental applicability still needs to be improved. Utility Model Content

[0005] The utility model aims to overcome the above-mentioned defects of the prior art and provide a multi-purpose fully automatic steam generator.

[0006] To achieve the above-mentioned purpose, the utility model multi-purpose fully automatic steam generator is a vertical electric low-pressure steam generator with bottom legs and drain valve and a water tank for supplying water to the generator, which are fixed in parallel on a rectangular base; the special feature is that a protective box with a door is arranged on the outer circumference of the rectangular base to protect the water tank, the electric low-pressure steam generator and its bottom legs; a water level gauge is arranged on one side of the protective box to be horizontally connected to the generator, and the generator is upwardly connected and arranged in parallel with: a safety valve and a pressure gauge passing through the top of the protective box, and a steam-water separator and a pressure controller that provide low-pressure steam to the outside through a pressure pipe and a valve; the generator is equipped with an electronic liquid level controller with a probe extending deep into the water surface of the tank, and a plurality of groups of electric heating tubes connected in parallel to an automatic control system are arranged at the bottom of the generator, a control panel is arranged on the upper front of the protective box, and a ventilation grille is arranged on the top or upper part of the protective box. The introduction of ventilation grilles on the protective box and its top or upper part can effectively block the heat radiation of more than 170℃ to the surrounding environment, and the environmental adaptability is significantly improved; the ventilation grilles can prevent condensation of water on the electronic devices in the protective box through ventilation, ensuring the normal operation of the equipment. The protective box is equipped with a door to facilitate daily visual inspection and maintenance. A water level gauge that is horizontally connected to the generating tank is provided on one side of the protective box, which is convenient for real-time observation of the water level. The generating tank is configured with a safety valve, a pressure gauge, and a steam-water separator and a pressure controller that pass through the top of the protective box and provide low-pressure steam to the outside through a pressure pipe and a valve, which can better ensure the normal operation of the equipment. It has the advantages of significantly reducing heat radiation to the surrounding environment and good environmental applicability.

[0007] As an optimization, the protective box and its door are composed of a metal plate outer layer and a metal foil anti-radiation inner layer from the outside to the inside. The metal foil is aluminum foil. By enhancing the inward reflection ability of heat radiation, it is more conducive to blocking the heat radiation of more than 170°C to the surrounding environment and reducing the impact on the environment.

[0008] As an optimization, the layered structure of the protective box and its door from outside to inside is composed of an outer layer of metal plate, a middle layer of foamed resin and an inner layer of metal foil anti-radiation, which significantly enhances the thermal insulation performance.

[0009] As an optimization, multiple parallel ventilation grilles are provided on the top surface of the front of the protective box, and multiple parallel ventilation grilles are provided on the lower parts of both sides of the rear of the protective box. The upper and lower ventilation grilles provide convection ventilation, which can better prevent condensation on electronic devices.

[0010] As an optimization, the protection box is composed of the front and rear inner side side buckle plates, the front and rear inner side front and rear buckle plates, the front and rear inner side top lifting plates and the inner side front door buckle plates. The horizontal connecting pipe of the water level gauge and the vertical connecting pipe of the safety valve, pressure gauge, pressure pipe and valve pass through the front and rear parts of the protection box, which is convenient for disassembly and maintenance.

[0011] As an optimization, a foamed resin middle layer and a metal foil anti-radiation inner layer are sequentially arranged in the inner groove of the gusset plate, so that the foamed resin middle layer can be firmly arranged and has better durability.

[0012] As an optimization, the control panel is equipped with a digital display thermostat, a power switch and indicator light, a manual water adding button and indicator light, a high and low power selection switch and a heating indicator light, a water shortage alarm light and an over-temperature alarm light, which is convenient for operation.

[0013] As an optimization, the digital display thermostat is electrically connected to the four parallel electric heating tubes through the sub-control line and the sub-control AC contactor, and the temperature detectors electrically connected to the digital display thermostat are installed on the flanges where the electric heating tubes are installed. A temperature detector is installed on each flange, and the control can adjust the temperature according to the environment, prevent the AC contactor from sticking, and the temperature control design has an alarm indicator. Each group can adjust the temperature; and it can prevent individual groups from sudden heating when the contactor sticks and there are debris blocking the heating tube, causing the phenomenon of local heating being easily damaged; it can directly display and observe which group of electric heaters is damaged or has other faults, which is more intuitive.

[0014] As an optimization, the water level gauge is a side-mounted magnetic flap level gauge. It is changed to a magnetic flap level gauge. Principle: The clean steam generator uses pure water for electrical heating. The original probe-type level gauge cannot detect the liquid level or may detect the liquid level inaccurately due to its low conductivity. This defect is overcome by changing to a magnetic flap level gauge design. The magnetic flap level gauge displays the positive and negative polarity of the magnetism and will automatically flip the plate. Functional features: 1. The structure is simple, laser marking is used, the reading display is more intuitive, clear and accurate, the performance is stable, and the glass plate level gauge has poor clarity and easy breakage. The measurement range is larger and there is no blind spot. 2. The measured medium and the indicating structure are completely isolated and sealed to effectively prevent leakage. 3. The overall material combination (304 / 316 / 321 stainless steel, PP / PVC, all-titanium, all-aluminum, stainless steel lined with tetrafluoroethylene) is used to adapt to high temperature (-40~450℃), high pressure (medium pressure reaches 25MPa and below), and level measurement under corrosive conditions, and the reliability is enhanced. 4. Through the magnetic switch function characteristics, the low water level shortage and high water level over-limit alarm functions are realized. In addition, the magnet size of the magnetic flap level gauge is improved to solve the problem of easy demagnetization after high temperature in actual use, and at the same time, the gas storage capacity can be increased.

[0015] As an optimization, a one-way valve is connected to the bypass on the pipeline between the safety valve and the steam generator tank. Add a one-way valve: After the steam generator is used, it is easy to generate negative pressure in the cavity after cooling down for a period of time, causing the negative pressure to suck in part of the water, resulting in inaccurate water level display on the liquid level gauge. After adding a one-way valve, if there is negative pressure, air can be sucked in to prevent the occurrence of negative pressure water absorption and other phenomena. The one-way valve is installed at the bottom of the safety valve. A drain valve is installed at the bottom of the liquid level controller to facilitate water sampling and drain function. The material is resistant to strong acids and alkalis and explosion-proof requirements, and can be used in a straight-through or side-discharge type. Generally, the straight-through type is more convenient.

[0016] Each group of electric heating tubes is respectively connected to a three-phase air circuit breaker of a three-phase power supply through its own configured heating AC contactor; the main power switch connected in series with the power indicator light is connected to the two-phase power supply through a two-phase air circuit breaker; the main power switch is connected to the high and medium water level control modules and the low water level control module and the extremely low water level control module of the electronic liquid level controller which are respectively connected in parallel with the power indicator light; the high and medium water level control switches of the high and medium water level control modules are connected in parallel with the water adding button switch, and then connected in series with the water adding indicator light to the main power switch in parallel; the switch end of the water adding pump relay is connected in series with the water adding pump and then connected in parallel with the power indicator light to the main power switch; the low water level control module is connected in parallel with the water adding button switch, and then connected in parallel with the water adding indicator light to the main power switch; The low water level control switch of the water level control module is connected in series with the low water level alarm indicator light and then connected to the main power switch in parallel with the power indicator light; the low water level control switch of the low water level control module is also connected in series with the extremely low water level control switch of the extremely low water level control module, the pressure control switch of the pressure controller, the temperature control switch of the thermostat and multiple groups of parallel AC contactors and then connected to the main power switch in parallel with the power indicator light; the multiple groups of parallel AC contactors are also connected in parallel with heating indicator lights; or the multiple groups of parallel AC contactors are also connected in parallel with heating indicator lights, the water level gauge is connected to a two-phase power supply controlled by the main power switch, and the high and medium water level control switches are also connected in parallel with the low water level switch controlled by the low water level sensor of the water level gauge. The electric heating tubes are four or more groups, and at least one of the multiple parallel AC contactors configured for them is connected in series with a manual selection switch; the high and medium water level control modules, the low water level control module and the extremely low water level control module of the electronic liquid level controller are respectively configured with high and medium water level control probes, low water level control probes and extremely low water level control probes extending downward into the top of the electric heating tubes in the generating tank. The water pump is a multi-stage vortex pump; the rectangular base is composed of an upper bracket and a lower leg fixed downwardly on the upper bracket, and the bottom of the generating tank is connected to the drain valve through a drain pipe extending outward from the bottom of the upper bracket; the outer periphery of the generating tank is configured with a heat insulation layer. The bottom of the generating tank is connected to the upper end of the upwardly bent drain pipe through a flange fixedly connected by standard fasteners, and the end of the drain pipe is connected to the drain valve through a flange fixedly connected by standard fasteners. A float inlet valve is configured on the upper part of the water tank, and the inlet valve is connected to the softened water source through the inlet pipe and the stop valve. The stop valve is connected to the softened water source through a filter.

[0017] The generating tank is a pressure-resistant cylindrical tank with a pressure-resistant spherical cap and a bottom fixed to the upper and lower ends. The water level gauge is arranged in the front of the middle part of the tank body, and the electric heating tube is installed on the left side of the lower part of the tank body through a pressure-resistant pipe seat and a flange. The water tank is arranged on the right side of the generating tank through a transversely arranged rectangular base. The lower water outlet of the water tank is connected to the lower right side of the tank body through the water pump and a pressure water supply pipe with a one-way valve in series; the pressure controller is arranged on the upper rear side of the generating tank. The three legs at the bottom of the generating tank are distributed in an isosceles triangle, of which one at the top corner is located on the right side of the generating tank, and the other two at the bottom corner are located on the front and rear sides of the generating tank. The other two lower end connecting lines are preferably perpendicular to the horizontal axis of the rectangular base; the pressure-resistant pipe seat, flange and electric heating pipe are four sets distributed in a square in front of the lower left side of the tank body; the upper end of the water level gauge is connected to the front of the middle part of the tank body through an elbow, a stop valve and a flange, and the lower end of the water level gauge is connected to the front of the middle part of the tank body through a tee and a flange, and the tee is connected to the drain nozzle downward through the stop valve. The left side of the top of the generating tank is connected to the stop valve that provides pressure steam to the outside through a water trap and a steam-water separator, and the electronic liquid level controller with a probe deep under the water surface in the generating tank is arranged on the right side of the top of the generating tank, the front side of the top of the generating tank is connected to the pressure gauge upward through a rotary water trap, and the back side of the top of the generating tank is connected to the safety valve upward.

[0018] In short, the main unit of the equipment is the control system and heating system unit, so you must be extra careful when dismantling the main unit packaging box. It is forbidden to tilt or invert it. The main unit cover, that is, the protective box is made of 304 stainless steel. The main unit of the equipment has a protective film on the outer surface of the stainless steel when it leaves the factory. In order to protect the stainless steel plate surface, be careful not to scratch it during transportation. If you find scratches or damage when disassembling the package, please contact the supplier representative in time.

[0019] Working principle: Steam generator is a device that uses pure water to produce pure steam. It is widely used in the sterilization and disinfection of medical and health care, biopharmaceutical industry, food industry and related equipment, and effectively prevents re-contamination of impurities such as heavy metals and pyrogens. According to pressure and temperature, various steams are classified as: saturated steam, superheated steam. When liquid evaporates in a limited, confined space, liquid molecules enter the space above through the liquid surface and become steam molecules. Because steam molecules are in a turbulent thermal motion, they collide with each other, and collide with the container wall and the liquid surface. When colliding with the liquid surface, some molecules are attracted by liquid molecules and return to the liquid to become liquid molecules. At the beginning of evaporation, the number of molecules entering the space is greater than the number of molecules returning to the liquid.

[0020] Pipeline and control system. Water level control: The magnetic column level gauge adopts the principle of communicating vessels to introduce the liquid into the main body at the same height. A permanent magnetic float floats in the main body. The magnetic energy driven by the float is transmitted out of the main body without obstruction and is always positioned on the surface of the liquid. The liquid level position indication measured on site by the level gauge uses the magnetic field attached to the liquid surface in the main body to push 180°, changing from white to red. When the liquid level drops, the column is pushed back 180° by the magnetic field in the liquid surface in the main body, changing from red to white. Pressure control: Imported high-quality pressure controller controls and adjusts the working pressure. When the steam pressure in the body reaches the upper limit set by the pressure controller, the heating power supply can be automatically cut off; when the steam pressure in the body drops to the set lower limit, the heating power supply can be automatically connected. Heating protection: Dual automatic protection measures of liquid level controller and temperature controller are adopted. When the water level in the generator drops to the lower water level due to unexpected reasons, the heating power supply can be automatically cut off; once the liquid level controller fails and the water level continues to drop to the position of the electric heating tube, in order to prevent the electric heating tube from drying out without water, the temperature controller will send a signal to cut off the heating power supply to ensure that the heating element will not be damaged due to drying out without water. Double overpressure automatic protection: It has double overpressure protection of pressure controller and safety valve. Overcurrent protection function: When the generator is working, due to various accidents, the current is too large, the circuit protection function will be activated to prevent damage to personnel and equipment. Automatic sewage discharge function: The equipment is equipped with a manual sewage discharge ball valve.

[0021] Steam generator operation procedures: 1. When using or reactivating the equipment for the first time: check and confirm that the power supply of the equipment is correctly connected according to the requirements of the equipment nameplate; check and confirm that all steam pipelines on the equipment are complete and undamaged and installed in place; check and confirm whether the water supply pipeline on the equipment is connected and installed in place; turn on the power switch on the equipment, the heating cavity of the equipment starts to heat, and the heating lamp is on until it reaches the preset value and then the heating lamp goes out. 2. Daily inspection and maintenance: check whether the indicator light on the host panel is displayed normally; check whether the value of the heating cavity pressure gauge is normal; observe whether the water injection pipeline connected to the equipment is normal. 3. When the equipment is out of use: turn off the power switch, the equipment automatically adds water and steam is emitted at the same time until the pressure in the heating cavity of the equipment returns to zero; open the drain hand valve to discharge the residual liquid and trace gas and then close the drain hand valve. 4. Precautions: Please ensure that the equipment is fully cooled before performing related operations to avoid damage to personnel and equipment; please regularly maintain the equipment to ensure the normal use of the equipment; in order to ensure the safety of equipment and personnel, the operation and maintenance of the equipment must be performed by qualified and authorized personnel.

[0022] After adopting the above technical scheme, the utility model multi-purpose fully automatic steam generator has the advantages of significantly reducing heat radiation to the surrounding environment, good environmental applicability, each electric heating tube is individually controlled by AC contact, which is conducive to avoiding sudden heating failures, accurate and reliable water level display, and convenient disassembly, assembly, maintenance and operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a main structural schematic diagram of an existing fully automatic electric heating low-pressure steam generating device. Figure 2 The invention is a side view structural schematic diagram of an existing fully automatic electric heating low-pressure steam generating device. Figure 3 It is a three-dimensional structural schematic diagram of the first embodiment of the multi-purpose fully automatic steam generator of the utility model. Figure 4 It is a main structural schematic diagram of a first embodiment of the multi-purpose fully automatic steam generator of the utility model. Figure 5 It is a main structural schematic diagram of a first embodiment of the multi-purpose fully automatic steam generator control panel of the utility model. Figure 6 It is a three-dimensional structural schematic diagram of a second embodiment of the multi-purpose fully automatic steam generator of the utility model. Figure 7 It is a three-dimensional structural schematic diagram of a third embodiment of the multi-purpose fully automatic steam generator of the utility model. DETAILED DESCRIPTION

[0024] Embodiment 1, as Figure 3-5 As shown, the utility model multi-purpose fully automatic steam generator is a vertical electric low-pressure steam generator with bottom legs and drain valve fixed in parallel on a rectangular base, and a water tank for supplying water to the generator; it is characterized in that a protective box 1 is provided on the outer circumference of the rectangular base to protect the water tank, the electric low-pressure steam generator and its bottom legs, and a front door 10; a water level gauge 2 is provided on one side of the protective box 1 to be horizontally connected to the generator, and the generator is upwardly connected and arranged in parallel: a safety valve 20 passing through the top of the protective box 1, a pressure gauge 21, and a steam-water separator and a pressure controller 22 that provide low-pressure steam to the outside through a pressure pipe and a valve; the generator is equipped with an electronic liquid level controller with a probe extending deep into the water surface of the tank, and a plurality of groups of electric heating tubes connected in parallel to an automatic control system are arranged at the bottom of the generator, a control panel 3 is provided on the upper front of the protective box 1, and a ventilation grille 11 is provided on the top or upper part of the protective box 1. The introduction of ventilation grilles on the protective box and its top or upper part can effectively block the heat radiation of more than 170℃ to the surrounding environment, and the environmental adaptability is significantly improved; the ventilation grilles can prevent condensation of water on the electronic devices in the protective box through ventilation, ensuring the normal operation of the equipment. The protective box is equipped with a door to facilitate daily visual inspection and maintenance. A water level gauge that is horizontally connected to the generating tank is provided on one side of the protective box, which is convenient for real-time observation of the water level. The generating tank is configured with a safety valve, a pressure gauge, and a steam-water separator and a pressure controller that pass through the top of the protective box and provide low-pressure steam to the outside through a pressure pipe and a valve, which can better ensure the normal operation of the equipment.

[0025] Specifically, a plurality of parallel longitudinal ventilation grilles 11 are provided on the top surface of the front of the protection box 1 , and a plurality of parallel vertical ventilation grilles 11 are provided on the lower parts of both sides of the rear of the protection box 1 .

[0026] Specifically, the protective box 1 is composed of side buckle plates on the front and rear inner edges, front and rear buckle plates on the front and rear inner edges, top lifting plates on the front and rear inner edges, and front door buckle plates on the inner edges. The horizontal connecting pipe of the water level gauge 2 and the safety valve 20, pressure gauge 21, pressure pipe and valve's vertical connecting pipe pass through between the front and rear parts of the protective box 1.

[0027] Specifically, the control panel 3 is provided with a digital display thermostat 30, a power switch 31 and an indicator light 311, a manual water adding button 32 and an indicator light 321, a high and low power selection switch 33 and a heating indicator light 331, a water shortage alarm light 34 and an over-temperature alarm light 35. The water level gauge 2 is a side-mounted magnetic flap type liquid level gauge.

[0028] Specifically, the digital display thermostat 30 is electrically connected to four parallel electric heating tubes through the sub-control line and the sub-control AC contactor, and the temperature detectors electrically connected to the digital display thermostat 30 are installed on the flanges where the electric heating tubes are installed. A bypass check valve is connected on the pipeline between the safety valve 20 and the steam generator tank. A drain valve is installed at the bottom of the liquid level controller to facilitate water sampling and draining. The material is resistant to strong acids and alkalis and explosion-proof requirements, and can be used in a straight-through type or a side-discharge type. Generally, the straight-through type is more convenient.

[0029] Embodiment 2, as Figure 6 As shown, the difference between the multi-purpose fully automatic steam generator of the utility model and the above-mentioned embodiment 1 is that the layered structure of the protective box 1 and its front door 10 from the outside to the inside is sequentially composed of a stainless steel metal plate outer layer 12 and an aluminum foil anti-radiation inner layer 14. More specifically, the layered structure of the protective box 1 and its front door 10 from the outside to the inside is sequentially composed of a stainless steel metal plate outer layer 12, a foamed resin middle layer 13 and an aluminum foil anti-radiation inner layer 14. The foamed resin middle layer 13 and the aluminum foil anti-radiation inner layer 14 are sequentially arranged in the inward groove of the gusset plate.

[0030] Embodiment three, as Figure 7 As shown, the difference between the multi-purpose fully automatic steam generator of the utility model and the above-mentioned embodiment 2 is that only the top surface of the front part of the protection box 1 is provided with multiple parallel longitudinal ventilation grilles 11. The lower parts of the two sides of the rear part of the protection box are not provided with multiple parallel vertical ventilation grilles. In short, the multi-purpose fully automatic steam generator of the utility model has the advantages of significantly reducing heat radiation to the surrounding environment, good environmental applicability, each electric heating tube is controlled by AC contact, which is conducive to avoiding sudden heating failures, accurate and reliable water level display, and convenient disassembly, maintenance and operation.

Claims

1. A multi-purpose fully automatic steam generator, a vertical electric heating low-pressure steam generator with bottom legs and a drain valve and a water tank for supplying water to the generator are fixed in parallel on a rectangular base; characterized in that A protective water tank, an electric low-pressure steam generator tank and its bottom legs are arranged upward on the outer periphery of the rectangular base, and the protective box is provided with a door; a water level gauge is arranged on one side of the protective box and is horizontally connected to the generator tank, and the generator tank is upwardly connected in parallel with: a safety valve and a pressure gauge passing through the top of the protective box, and a steam-water separator and a pressure controller that provide low-pressure steam to the outside through a pressure pipe and a valve; the generator tank is equipped with an electronic liquid level controller with a probe that penetrates into the water surface of the tank, and a plurality of groups of electric heating tubes connected in parallel to the automatic control system are arranged at the bottom of the generator tank, a control panel is arranged on the upper front of the protective box, and a ventilation grille is arranged on the top or upper part of the protective box.

2. The multi-purpose fully automatic steam generator according to claim 1, characterized in that The hierarchical structure of the protective box and its door from outside to inside consists of an outer layer of metal plate and an inner layer of metal foil anti-radiation.

3. The multi-purpose fully automatic steam generator according to claim 2, characterized in that The layered structure of the protective box and its door from outside to inside consists of an outer layer of metal plate, a middle layer of foamed resin and an inner layer of metal foil anti-radiation.

4. The multi-purpose fully automatic steam generator according to claim 1, characterized in that The top surface of the front part of the protection box is provided with a plurality of parallel ventilation grilles, and the lower parts of both sides of the rear part of the protection box are respectively provided with a plurality of parallel ventilation grilles.

5. The multi-purpose fully automatic steam generator according to claim 1, characterized in that The protective box is composed of side buckle plates on the front and rear inner edges, front and rear buckle plates on the front and rear inner edges, top lifting plates on the front and rear inner edges, and front door buckle plates on the inner edges. The horizontal connecting pipe of the water level gauge and the vertical connecting pipe of the safety valve, pressure gauge, pressure pipe and valve pass through the front and rear parts of the protective box.

6. The multi-purpose fully automatic steam generator according to claim 5, characterized in that A foamed resin middle layer and a metal foil anti-radiation inner layer are arranged in sequence in the inward groove of the gusset plate.

7. The multi-purpose fully automatic steam generator according to claim 1, characterized in that The control panel is equipped with a digital display thermostat, a power switch and indicator light, a manual water adding button and indicator light, a high and low power selection switch and a heating indicator light, a water shortage alarm light and an over-temperature alarm light.

8. The multi-purpose fully automatic steam generator according to claim 7, characterized in that The digital display thermostat is electrically connected to four parallel electric heating tubes through sub-control lines and sub-control AC contactors, and temperature detectors electrically connected to the digital display thermostat are respectively installed on flanges for installing the electric heating tubes.

9. The multi-purpose fully automatic steam generator according to claim 1, characterized in that The water level gauge is a side-mounted magnetic flap type liquid level gauge.

10. The multi-purpose fully automatic steam generator according to claim 1, characterized in that A bypass check valve is provided on the pipeline between the safety valve and the steam generator tank.

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