Automatic control device of oil and gas fired boiler

Abstract

The invention relates to the related technical field of oil and gas boilers, in particular to an automatic control device of an oil and gas boiler, which comprises a boiler main body and a control box, the boiler main body comprises an outer boiler body and an inner boiler body, the outer boiler body is fixedly mounted on the ground through a support, and the control box is mounted on the front side surface of the outer boiler body; the inner boiler body is fixedly installed in an inner cavity of the outer boiler body, a front partition plate and a rear partition plate are fixedly installed on the two sides of the inner boiler body respectively, the inner cavity of the outer boiler body is divided into a front cavity, a middle cavity and a rear cavity by the front partition plate and the rear partition plate, and the portion, located on the outer side of the inner boiler body, of the middle cavity is a water storage cavity. Through the combined action of a water level sensor, a pressure sensor, a first water temperature sensor, a second water temperature sensor and a flue temperature sensor in the boiler body, the interior of the boiler body is effectively detected in real time, various faults in the boiler body are effectively subjected to emergency treatment, and therefore safe operation of the boiler body is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field related to oil-fired and gas-fired boilers, and in particular to an automatic control device for oil-fired and gas-fired boilers. Background Art

[0002] Oil-fired gas boiler, as the name implies, refers to a boiler that can burn both oil and gas. There was no such dual-fuel boiler before, because the burner was either oil or gas, and there was no dual-fuel burner. With the rapid development of thermal energy equipment in the world, some countries began to produce and sell oil-fired gas burners. The organic combination of dual-fuel burners and boilers gave birth to a new type of boiler - oil-fired gas boiler;

[0003] The existing Chinese patent document with announcement number CN204534639U discloses a low-nitrogen oxide steam injection boiler combustion device, which includes a boiler, a burner, a primary air inlet pipe, an emulsifier, a water inlet pipe, a fuel pipe, a secondary air inlet pipe, a fixing frame, a gas pipe, a flue gas return pipe, an automatic regulating valve, and a low-carbon flue gas output pipe. The outside of the boiler is connected to the burner, and the outside of the burner is connected to the primary air inlet pipe. The bottom of the burner is connected to the emulsifier, and the emulsifier is connected to the water inlet pipe and the fuel pipe. The burner is connected to the gas chamber inside the boiler. The top outlet of the boiler is provided with a low-carbon flue gas output pipe, and the low-carbon flue gas output pipe is provided with a flue gas control valve. The automatic regulating valve and the flue gas control valve are connected to a PLC controller. A flue gas return pipe is provided between the boiler and the burner, and an automatic flue gas regulating valve is provided on the secondary air inlet pipe and the flue gas return pipe. The outside of the boiler is connected to the secondary air inlet pipe, and the secondary air inlet pipe is connected to the gas chamber through the gas pipe.

[0004] However, the above scheme has a low degree of automation and cannot effectively handle various equipment failures in an emergency, resulting in a certain degree of safety hazards in the operation of the equipment. Therefore, the present invention proposes an automatic control device for an oil and gas boiler to solve the above problem. Summary of the invention

[0005] The object of the present invention is to provide an automatic control device for an oil and gas boiler to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an automatic control device for an oil-fired and gas-fired boiler, comprising a boiler body and a control box, the boiler body comprising an outer furnace body and an inner furnace body, the outer furnace body being fixedly installed on the ground by a support, the control box being installed on the front side of the outer furnace body, the inner furnace body being fixedly installed in the inner cavity of the outer furnace body, a front partition and a rear partition being fixedly installed on both sides of the inner furnace body, the inner cavity of the outer furnace body being divided into a front cavity, a middle cavity and a rear cavity by the front partition and the rear partition, the middle cavity being located on the outer side of the inner furnace body as a water storage cavity, the inner cavity of the inner furnace body being a combustion cavity, a burner being arranged on the front side of the outer furnace body, the combustion cavity being connected to the burner by a connecting pipe, the rear cavity being divided into an upper cavity and a lower cavity by a transverse partition, the rear side end of the inner furnace body being connected to the lower cavity, and a smoke exhaust pipe being connected to the upper cavity.

[0007] Preferably, a water level sensor, a pressure sensor and a first water temperature sensor are provided in the water storage chamber, a water inlet and a water outlet are connected to the water storage chamber, a second water temperature sensor is provided in the water outlet, a flue temperature sensor is provided in the smoke exhaust pipe, and the water level sensor, pressure sensor, first water temperature sensor, second water temperature sensor and flue temperature sensor are all electrically connected to the electronic control module in the control box.

[0008] Preferably, the front partition is provided with a front first-level mounting hole and a front second-level mounting hole, the rear partition is provided with a rear first-level mounting hole and a rear second-level mounting hole, the front first-level mounting hole and the front second-level mounting hole are respectively provided corresponding to the rear first-level mounting hole and the rear second-level mounting hole, a first-level heating tube is installed between the front first-level mounting hole and the rear first-level mounting hole, a second-level heating tube is installed between the front second-level mounting hole and the rear second-level mounting hole, the lower cavity is connected to the front cavity through the first-level heating tube, the front cavity is connected to the upper cavity through the second-level heating tube, and annular corrugations are formed on the side walls of the inner furnace body, and a plurality of annular corrugations are arranged at equal intervals.

[0009] Preferably, the fuel feeding head on the burner extends into a tube cavity arranged in the connecting pipe, and the fuel feeding head includes a first feeding nozzle body and a second feeding nozzle body, the first feeding nozzle body and the second feeding nozzle body are spliced ​​to form a complete nozzle body, and the front ends of the first feeding nozzle body and the second feeding nozzle body are respectively integrally formed with a primary semicircular tube and a secondary semicircular tube, the primary semicircular tube and the secondary semicircular tube are spliced ​​to form a complete tube body structure, and the outer side walls of the primary semicircular tube and the secondary semicircular tube are provided with a threaded structure, and the primary semicircular tube and the secondary semicircular tube are threadedly connected to the burner, and the rear end face of the first feeding nozzle body is evenly provided with spray holes.

[0010] Preferably, the upper and lower end faces of the first feeding nozzle body and the second feeding nozzle body are integrally formed with piston cavities. When the first feeding nozzle body and the second feeding nozzle body are actually connected, the piston cavities on the first feeding nozzle body and the second feeding nozzle body are spliced ​​to form a pair of air cavity structures, and pistons are movably installed in the upper and lower air cavities, the outer end face of the piston is fixedly connected to a connecting frame, the end of the connecting frame is fixedly connected to a mounting plate, the mounting plate is connected to a sealing plate via a connecting piece, the inner end face of the piston is provided with a spring groove, a supporting spring is fixedly connected in the spring groove, and the sealing plate is arranged in contact with the plane where the spray hole is located.

[0011] Preferably, a guide groove is provided on the side wall of the piston cavity, and a guide protrusion is integrally formed on the side wall of the piston. When the piston is actually installed, the guide protrusion is movably arranged in the guide groove. When the support spring is in a reset state, the guide protrusion is located at the outer end of the guide groove, and at this time, the end face of the piston is flush with the port of the piston cavity, and at this time, the sealing plates on both sides form a blocking effect on the spray holes on both sides, and when fuel is fed into the first feeding nozzle body and the second feeding nozzle body, due to the increase in internal pressure of the first feeding nozzle body and the second feeding nozzle body, the piston moves to both sides, thereby reducing the number of obstructions of the spray holes by the sealing plates.

[0012] Preferably, the sealing plate includes a support plate and a rubber plate, and the connecting piece is composed of an outer elastic support body and an inner elastic support body, both of which are cast from spring steel, and the outer elastic support body is a shuttle-shaped frame structure, and the inner elastic support body is an elliptical frame structure, and when the sealing plate is against the inner wall of the first feeding nozzle body, the outer elastic support body and the inner elastic support body are both in a compressed state.

[0013] Preferably, the junction surface between the first feeding nozzle body and the second feeding nozzle body, the end surface of the first semicircular tube and the end surface of the piston cavity on the first feeding nozzle body are all provided with sealing grooves, and rubber gaskets are padded in the sealing grooves. The junction surface between the second feeding nozzle body and the first feeding nozzle body, the end surface of the second semicircular tube and the end surface of the piston cavity on the second feeding nozzle body are all formed with sealing protrusions. When the first feeding nozzle body and the second feeding nozzle body are actually docked, the sealing protrusions are embedded in the sealing grooves, and at this time, the rubber gaskets are in a compressed state.

[0014] Preferably, a collecting hopper is fixedly connected to the inner wall of the first-level semicircular tube via a connecting ring. When the second-level semicircular tube is actually connected to the first-level semicircular tube, the connecting ring is arranged to fit the inner wall of the second-level semicircular tube, and a filter element is arranged in the tube cavity of the first-level semicircular tube and the second-level semicircular tube. The filter element is arranged in a bullet shape, and a bellows is integrally formed at the open end of the filter element. A connecting port is formed at the port of the bellows, and the connecting port is connected to the port of the collecting hopper. Filter holes are evenly opened on the side wall of the filter element. The filter holes are a truncated cone-shaped hole structure, and the outer end diameter of the filter hole is smaller than the inner end diameter of the filter hole, and the outer end diameter value of the filter hole is smaller than the diameter value of the spray hole.

[0015] Preferably, a force spring is fixedly connected to the outer wall of the filter element, the force spring is evenly arranged in two circles, and the outer end of the force spring is set against the inner walls of the first-level semicircular tube and the second-level semicircular tube, and a wind-receiving paddle is integrally formed on the outer wall of the filter element, and the force spring and the wind-receiving paddle are staggered with the filter hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. By setting up an automatic control device for oil-fired and gas-fired boilers composed of a boiler body and a control box, and through the combined action of a water level sensor, a pressure sensor, a first water temperature sensor, a second water temperature sensor, and a flue temperature sensor inside the boiler body, the interior of the boiler body can be effectively detected in real time, thereby effectively handling various faults inside the boiler body in an emergency, thereby ensuring the safe operation of the boiler body;

[0018] 2. A fuel feeding head composed of a first feeding nozzle body and a second feeding nozzle body is provided, and a piston cavity is provided on the first feeding nozzle body and the second feeding nozzle body, and a piston is provided in the piston cavity. A mounting plate is provided on the piston through a connecting frame, and a sealing plate is connected to the mounting plate through a connecting piece, so that the number of opening nozzle holes on the first feeding nozzle body can be adaptively adjusted according to the demand for the feeding amount, so that when the feeding pressure changes, the fuel sprayed from the nozzle hole can always ensure sufficient pressure, thereby ensuring that the fuel can be fully fed into the combustion chamber, thereby ensuring that the combustion heat of the fuel can fully heat the middle of the combustion chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 A half-section view of the present invention;

[0021] Figure 3 for Figure 2 A schematic diagram of the structure enlargement in the middle;

[0022] Figure 4 for Figure 2 A magnified schematic diagram of the structure at B in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the fuel feeding head of the present invention;

[0024] Figure 6 This is a schematic diagram of the structure of the first feeding nozzle body of the present invention;

[0025] Figure 7 for Figure 6 A magnified schematic diagram of the structure at C in the middle;

[0026] Figure 8 for Figure 6 A magnified schematic diagram of the structure at D in the middle;

[0027] Fig. 9 This is a schematic diagram of the structure of the second feeding nozzle body of the present invention;

[0028] Fig.10 It is a half-section view of the first feeding nozzle body and the second feeding nozzle body of the present invention;

[0029] Fig.11 for Fig.10 The enlarged schematic diagram of the structure at E in the middle;

[0030] Fig.12 This is a schematic diagram of the sealing plate structure of the present invention;

[0031] Fig.13 for Fig.12 Enlarged schematic diagram of the structure at F in the middle.

[0032] In the figure: boiler body 1, control box 2, outer furnace body 3, inner furnace body 4, support 5, front baffle 6, rear baffle 7, connecting pipe 8, burner 9, transverse baffle 10, primary heating pipe 11, secondary heating pipe 12, annular corrugation 13, docking seat 14, fuel feeding head 15, first feeding nozzle body 16, second feeding nozzle body 17, primary semicircular tube 18, secondary semicircular tube 19, spray hole 20, piston cavity 21, piston 2 2. Connecting frame 23, mounting plate 24, sealing plate 25, connecting piece 26, supporting spring 27, guiding protrusion 28, outer elastic supporting body 29, inner elastic supporting body 30, supporting plate 31, rubber plate 32, sealing groove 33, sealing protrusion 34, connecting ring 35, collecting hopper 36, filter element 37, filter hole 38, bellows 39, connecting port 40, force spring 41, wind-receiving paddle 42, guiding groove 49, exhaust pipe 50. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] See also Figure 1-Figure 13 The present invention provides the following three preferred embodiments:

[0035] Embodiment 1: An automatic control device for an oil-fired gas boiler comprises a boiler body 1 and a control box 2. The boiler body 1 comprises an outer furnace body 3 and an inner furnace body 4. The outer furnace body 3 is fixedly installed on the ground through a support 5. The control box 2 is installed on the front side of the outer furnace body 3. The inner furnace body 4 is fixedly installed in the inner cavity of the outer furnace body 3. A front partition 6 and a rear partition 7 are fixedly installed on both sides of the inner furnace body 4 respectively. The inner cavity of the outer furnace body 3 is divided into a front cavity, a middle cavity and a rear cavity by the front partition 6 and the rear partition 7. The middle cavity is located on the outer side of the inner furnace body 4 and is a water storage cavity. The inner cavity of the inner furnace body 4 is a combustion cavity. A burner 9 is arranged on the front side of the outer furnace body 3. The combustion cavity is connected to the burner 9 through a connecting pipe 8. The rear cavity is divided into an upper cavity and a lower cavity by a transverse partition 10. The rear side end of the inner furnace body 4 is connected to the lower cavity. A smoke exhaust pipe 50 is connected to the upper cavity.

[0036] A water level sensor, a pressure sensor and a first water temperature sensor are arranged in the water storage chamber, a water injection port and a water discharge port are connected to the water storage chamber, a second water temperature sensor is arranged in the water discharge port, a flue temperature sensor is arranged in the smoke exhaust pipe 50, the water level sensor, the pressure sensor, the first water temperature sensor, the second water temperature sensor and the flue temperature sensor are all connected with the electrical signal of the electric control module in the control box 2, by setting an automatic control device for the oil and gas boiler composed of a boiler body 1 and a control box 2, and by the combined action of the water level sensor, the pressure sensor, the first water temperature sensor, the second water temperature sensor and the flue temperature sensor inside the boiler body 1, the interior of the boiler body 1 can be effectively detected in real time, thereby effectively carrying out emergency treatment of various faults inside the boiler body 1, thereby ensuring the safe operation of the boiler body 1.

[0037] A front first-level mounting hole and a front second-level mounting hole are provided on the front partition 6, and a rear first-level mounting hole and a rear second-level mounting hole are provided on the rear partition 7. The front first-level mounting hole and the front second-level mounting hole are respectively provided corresponding to the rear first-level mounting hole and the rear second-level mounting hole. A first-level heating tube 11 is installed between the front first-level mounting hole and the rear first-level mounting hole, and a second-level heating tube 12 is installed between the front second-level mounting hole and the rear second-level mounting hole. The lower cavity is connected to the front cavity through the first-level heating tube 11, and the front cavity is connected to the upper cavity through the second-level heating tube 12. An annular corrugation 13 is formed on the side wall of the inner furnace body 4, and a plurality of annular corrugations 13 are arranged at equal intervals. The arrangement of the first-level heating tube 11 and the second-level heating tube 12 can allow the flue gas to flow inside the boiler body 1 for a longer time, thereby effectively improving the heat utilization rate, and the annular corrugation 13 on the inner furnace body 4 can effectively increase the heat exchange area and form a disturbance effect on the flue gas to further improve the heat exchange effect.

[0038] Embodiment 2: On the basis of embodiment 1, the fuel feeding head 15 on the burner 9 extends into the tube cavity set in the connecting pipe 8, and the fuel feeding head 15 includes a first feeding nozzle body 16 and a second feeding nozzle body 17. The first feeding nozzle body 16 and the second feeding nozzle body 17 are spliced ​​to form a complete nozzle body, and the front side ends of the first feeding nozzle body 16 and the second feeding nozzle body 17 are respectively integrally formed with a primary semicircular tube 18 and a secondary semicircular tube 19, the primary semicircular tube 18 and the secondary semicircular tube 19 are spliced ​​to form a complete tube body structure, and the outer side walls of the primary semicircular tube 18 and the secondary semicircular tube 19 are provided with a threaded structure, and the primary semicircular tube 18 and the secondary semicircular tube 19 are threadedly connected to the burner 9, and the rear end face of the first feeding nozzle body 16 is evenly provided with spray holes 20.

[0039] The upper and lower end surfaces of the first feeding nozzle body 16 and the second feeding nozzle body 17 are integrally formed with a piston cavity 21. When the first feeding nozzle body 16 and the second feeding nozzle body 17 are actually connected, the piston cavities 21 on the first feeding nozzle body 16 and the second feeding nozzle body 17 are spliced ​​to form a pair of air cavity structures, and pistons 22 are movably installed in the upper and lower air cavities, and the outer end surface of the piston 22 is fixedly connected to a connecting frame 23, and the end of the connecting frame 23 is fixedly connected to a mounting plate 24, and a sealing plate 25 is connected to the mounting plate 24 through a connecting piece 26. A spring groove is opened on the inner end surface of the piston 22, and a support spring 27 is fixedly connected in the spring groove. The sealing plate 25 is arranged in contact with the plane where the spray hole 20 is located.

[0040] A guide groove 49 is provided on the side wall of the piston chamber 21, and a guide protrusion 28 is integrally formed on the side wall of the piston 22. When the piston 22 is actually installed, the guide protrusion 28 is movably arranged in the guide groove 49. When the support spring 27 is in the reset state, the guide protrusion 28 is located at the outer end of the guide groove 49, and at this time, the end face of the piston 22 is flush with the port of the piston chamber 21, and at this time, the sealing plates 25 located on both sides form a blocking effect on the spray holes 20 on both sides, and the first feeding nozzle body 1 6. When the fuel is fed into the second feeding nozzle body 17, the piston 22 moves to both sides due to the increase in the internal pressure of the first feeding nozzle body 16 and the second feeding nozzle body 17, thereby reducing the number of blockings of the sealing plate 25 on the spray hole 20. By providing a fuel feeding nozzle 15 composed of the first feeding nozzle body 16 and the second feeding nozzle body 17, and providing a piston cavity 21 on the first feeding nozzle body 16 and the second feeding nozzle body 17, and providing a piston 22 in the piston cavity 21. A mounting plate 24 is provided on the piston 22 through a connecting frame 23, and the sealing plate 25 is connected to the mounting plate 24 through a connecting piece 26, so that according to the demand for the feeding amount, the number of spray holes 20 opened on the first feeding nozzle body 16 can be adaptively adjusted, so that when the feeding pressure changes, the fuel sprayed from the spray hole 20 can always ensure sufficient pressure, thereby ensuring that the fuel can be fully fed into the combustion chamber, thereby ensuring that the combustion heat of the fuel can fully heat the middle of the combustion chamber.

[0041] The sealing plate 25 includes a support plate 31 and a rubber plate 32. The connecting piece 26 is composed of an outer elastic support body 29 and an inner elastic support body 30. The outer elastic support body 29 and the inner elastic support body 30 are both cast from spring steel, and the outer elastic support body 29 is a shuttle-shaped frame structure, and the inner elastic support body 30 is an elliptical frame structure. When the sealing plate 25 abuts against the inner wall of the first feeding nozzle body 16, the outer elastic support body 29 and the inner elastic support body 30 are both in a compressed state. The setting of the outer elastic support body 29 and the inner elastic support body 30 can ensure that the sealing plate 25 is stably abutted against the port of the spray hole 20. The sealing plate 25 is configured to be composed of a support plate 31 and a rubber plate 32. The rubber plate 32 can further improve the sealing effect on the spray hole 20.

[0042] The junction surface between the first feeding nozzle body 16 and the second feeding nozzle body 17, the end surface of the first semicircular tube 18 and the end surface of the piston cavity 21 on the first feeding nozzle body 16 are all provided with sealing grooves 33, and rubber washers are padded in the sealing grooves 33. The junction surface between the second feeding nozzle body 17 and the first feeding nozzle body 16, the end surface of the second semicircular tube 19 and the end surface of the piston cavity 21 on the second feeding nozzle body 17 are all formed with sealing protrusions 34. When the first feeding nozzle body 16 and the second feeding nozzle body 17 are actually docked, the sealing protrusion 34 is embedded in the sealing groove 33, and at this time, the rubber washers are in a compressed state. The provision of the rubber washers can improve the sealing performance at the junction of the structures.

[0043] Embodiment 3: On the basis of embodiment 2, a collecting hopper 36 is fixedly connected to the inner wall of the primary semicircular tube 18 through a connecting ring 35. When the secondary semicircular tube 19 is actually connected to the primary semicircular tube 18, the connecting ring 35 is arranged in a close fit with the inner wall of the secondary semicircular tube 19, and a filter 37 is arranged in the tube cavity of the primary semicircular tube 18 and the secondary semicircular tube 19. The filter 37 is arranged in a bullet shape, and the open end of the filter 37 is integrally formed with a bellows 39, and the port of the bellows 39 is formed with a connecting port 4 0, the connecting port 40 is connected to the port of the collecting hopper 36, and filter holes 38 are evenly opened on the side wall of the filter element 37. The filter holes 38 are a truncated cone-shaped hole structure, and the outer end diameter of the filter hole 38 is smaller than the inner end diameter of the filter hole 38, and the outer end diameter value of the filter hole 38 is smaller than the diameter value of the nozzle 20. Through the filtering effect of the filter element 37, the nozzle 20 is effectively prevented from being blocked by impurities, and the filter hole 38 is a truncated cone-shaped hole structure, which can effectively reduce the clogging of impurities in the filter hole 38.

[0044] A force spring 41 is fixedly connected to the outer wall of the filter element 37, and the force spring 41 is evenly arranged with two circles. The outer end of the force spring 41 is set against the inner wall of the first-stage semicircular tube 18 and the second-stage semicircular tube 19, and a wind-receiving paddle 42 is integrally formed on the outer wall of the filter element 37. The force spring 41 and the wind-receiving paddle 42 are staggered with the filter hole 38. When the wind-receiving paddle 42 is subjected to the force of the fuel flow, the filter element 37 will form a self-shaking effect, thereby effectively shaking off the impurities blocking the port of the filter hole 38, thereby forming a self-cleaning effect on the filter hole 38.

[0045] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. An automatic control device for oil and gas boilers, characterized in that: The invention comprises a boiler body (1) and a control box (2), wherein the boiler body (1) comprises an outer furnace body (3) and an inner furnace body (4), wherein the outer furnace body (3) is fixedly mounted on the ground via a support (5), the control box (2) is mounted on the front side of the outer furnace body (3), the inner furnace body (4) is fixedly mounted in the inner cavity of the outer furnace body (3), and a front partition (6) and a rear partition (7) are fixedly mounted on both sides of the inner furnace body (4), and the inner cavity of the outer furnace body (3) is enclosed by the front partition (6) and the rear partition (7). 7) is divided into a front cavity, a middle cavity and a rear cavity, the middle cavity is located on the outer side of the inner furnace body (4) and is a water storage cavity, the inner cavity of the inner furnace body (4) is a combustion cavity, a burner (9) is arranged on the front side of the outer furnace body (3), and the combustion cavity is connected to the burner (9) through a connecting pipe (8), the rear cavity is divided into an upper cavity and a lower cavity by a transverse partition (10), the rear side end of the inner furnace body (4) is connected to the lower cavity, and the upper cavity is connected to a smoke exhaust pipe (50).

2. The automatic control device for oil and gas boiler according to claim 1, characterized in that: A water level sensor, a pressure sensor and a first water temperature sensor are arranged in the water storage chamber, a water inlet and a water outlet are connected to the water storage chamber, a second water temperature sensor is arranged in the water outlet, a flue temperature sensor is arranged in the smoke exhaust pipe (50), and the water level sensor, the pressure sensor, the first water temperature sensor, the second water temperature sensor and the flue temperature sensor are all electrically connected to the electric control module in the control box (2).

3. The automatic control device for oil and gas boiler according to claim 1, characterized in that: The front partition (6) is provided with a front first-level mounting hole and a front second-level mounting hole, and the rear partition (7) is provided with a rear first-level mounting hole and a rear second-level mounting hole. The front first-level mounting hole and the front second-level mounting hole are respectively provided to correspond to the rear first-level mounting hole and the rear second-level mounting hole. A first-level heating tube (11) is installed between the front first-level mounting hole and the rear first-level mounting hole, and a second-level heating tube (12) is installed between the front second-level mounting hole and the rear second-level mounting hole. The lower cavity is connected to the front cavity through the first-level heating tube (11), and the front cavity is connected to the upper cavity through the second-level heating tube (12). The side wall of the inner furnace body (4) is formed with an annular corrugation (13), and a plurality of annular corrugations (13) are arranged at equal intervals.

4. The automatic control device for oil-fired and gas-fired boiler according to claim 1, characterized in that: The fuel feeding head (15) on the burner (9) extends into a tube cavity arranged in the connecting tube (8), and the fuel feeding head (15) comprises a first feeding nozzle body (16) and a second feeding nozzle body (17), the first feeding nozzle body (16) and the second feeding nozzle body (17) are spliced ​​to form a complete nozzle body, and the front side ends of the first feeding nozzle body (16) and the second feeding nozzle body (17) are respectively integrally formed with a first semicircular tube (18) and a second semicircular tube (19), the first semicircular tube (18) and the second semicircular tube (19) are spliced ​​to form a complete tube body structure, and the outer side walls of the first semicircular tube (18) and the second semicircular tube (19) are provided with a threaded structure, and the first semicircular tube (18) and the second semicircular tube (19) are threadedly connected to the docking seat (14) on the burner (9), and the rear end surface of the first feeding nozzle body (16) is evenly provided with spray holes (20).

5. The automatic control device for oil-fired and gas-fired boiler according to claim 4, characterized in that: The upper and lower end surfaces of the first feeding nozzle body (16) and the second feeding nozzle body (17) are integrally formed with a piston cavity (21). When the first feeding nozzle body (16) and the second feeding nozzle body (17) are actually connected, the piston cavities (21) on the first feeding nozzle body (16) and the second feeding nozzle body (17) are spliced ​​to form a pair of air cavity structures, and pistons (22) are movably installed in the upper and lower air cavities. The outer end surface of the piston (22) is fixedly connected to a connecting frame (23), and the end of the connecting frame (23) is fixedly connected to a mounting plate (24). The mounting plate (24) is connected to a sealing plate (25) via a connecting piece (26). The inner end surface of the piston (22) is provided with a spring groove, and a supporting spring (27) is fixedly connected in the spring groove. The sealing plate (25) is arranged to be close to the plane where the spray hole (20) is located.

6. The automatic control device for oil-fired and gas-fired boiler according to claim 5, characterized in that: A guide groove (49) is provided on the side wall of the piston cavity (21), and a guide protrusion (28) is integrally formed on the side wall of the piston (22). When the piston (22) is actually installed, the guide protrusion (28) is movably arranged in the guide groove (49). When the support spring (27) is in a reset state, the guide protrusion (28) is located at the outer end of the guide groove (49). At this time, the end surface of the piston (22) is flush with the end of the piston cavity (21). At this time, the sealing plates (25) on both sides form a blocking effect on the spray holes (20) on both sides. When fuel is fed into the first feeding nozzle body (16) and the second feeding nozzle body (17), due to the increase in internal pressure of the first feeding nozzle body (16) and the second feeding nozzle body (17), the piston (22) moves to both sides, thereby reducing the number of blockings of the sealing plate (25) on the spray holes (20).

7. The automatic control device for oil-fired and gas-fired boilers according to claim 6, characterized in that: The sealing plate (25) comprises a support plate (31) and a rubber plate (32); the connecting piece (26) is composed of an outer elastic support body (29) and an inner elastic support body (30); the outer elastic support body (29) and the inner elastic support body (30) are both cast from spring steel, and the outer elastic support body (29) is a shuttle-shaped frame structure, and the inner elastic support body (30) is an elliptical frame structure; when the sealing plate (25) abuts against the inner wall of the first feeding nozzle body (16), the outer elastic support body (29) and the inner elastic support body (30) are both in a compressed state.

8. The automatic control device for oil-fired and gas-fired boiler according to claim 7, characterized in that: The interface between the first feeding nozzle body (16) and the second feeding nozzle body (17), the end face of the first semicircular tube (18) and the end face of the piston chamber (21) on the first feeding nozzle body (16) are all provided with sealing grooves (33), and rubber gaskets are padded in the sealing grooves (33). The interface between the second feeding nozzle body (17) and the first feeding nozzle body (16), the end face of the second semicircular tube (19) and the end face of the piston chamber (21) on the second feeding nozzle body (17) are all formed with sealing protrusions (34). When the first feeding nozzle body (16) and the second feeding nozzle body (17) are actually connected, the sealing protrusions (34) are embedded in the sealing grooves (33), and at this time, the rubber gasket is in a compressed state.

9. The automatic control device for oil-fired and gas-fired boiler according to claim 8, characterized in that: A collecting hopper (36) is fixedly connected to the inner side wall of the primary semicircular tube (18) via a connecting ring (35); when the secondary semicircular tube (19) is actually connected to the primary semicircular tube (18), the connecting ring (35) is arranged in close contact with the inner wall of the secondary semicircular tube (19); and a filter (37) is arranged in the tube cavity of the primary semicircular tube (18) and the secondary semicircular tube (19); the filter (37) is arranged in a bullet shape, and the open end of the filter (37) is A bellows (39) is integrally formed, a connection port (40) is formed at the port of the bellows (39), and the connection port (40) is connected to the port of the collecting hopper (36). Filter holes (38) are evenly formed on the side wall of the filter element (37), and the filter holes (38) are of a truncated cone-shaped hole structure, and the outer end diameter of the filter hole (38) is smaller than the inner end diameter of the filter hole (38), and the outer end diameter value of the filter hole (38) is smaller than the diameter value of the spray hole (20).

10. The automatic control device for oil and gas boiler according to claim 9, characterized in that: A force-bearing spring (41) is fixedly connected to the outer wall of the filter element (37), the force-bearing spring (41) is evenly arranged with two circles, and the outer end of the force-bearing spring (41) is arranged to abut against the inner walls of the primary semicircular tube (18) and the secondary semicircular tube (19), and a wind-receiving paddle (42) is integrally formed on the outer wall of the filter element (37), and the force-bearing spring (41) and the wind-receiving paddle (42) are both arranged to be offset from the filter hole (38).

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