A piston-type coal-fired internal combustion generator

Abstract

The present invention relates to the technical field of coal-fired generators, and in particular to a piston-type coal-fired internal combustion generator. The main cylinder in the piston-type coal-fired internal combustion generator can provide a closed working space for coal powder combustion, so as to ensure that the coal powder can be slowly and fully burned in the main cylinder, thereby improving the combustion efficiency and reducing the heat energy loss; the high-pressure gas generated when the coal powder is burned can drive the working piston to move, so that the medium in the buffer chamber can enter the gear pump under the push of the working piston to drive the gear pump to move, so as to drive the generator body to rotate through the gear pump to generate electricity.

Description

Technical Field

[0001] The invention belongs to the technical field of coal-fired generators, and in particular relates to a piston-type coal-fired internal combustion generator. Background Art

[0002] Most of the existing coal combustion methods use external combustion. For example, large thermal power plants use coal combustion to heat boilers, produce steam, and drive steam turbines to generate electricity. This external combustion method generally has many defects such as complex operation links, large heat energy losses, and low heat engine efficiency, resulting in low energy utilization. Therefore, inventing a coal-fired internal combustion power generation equipment with low heat energy loss is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0003] The present invention provides a piston-type coal-fired internal combustion generator to solve the technical problem that the existing power generation equipment using external combustion to perform work has a large heat energy loss, which leads to a significant reduction in energy utilization.

[0004] The present invention is achieved through the following technical solutions:

[0005] A piston-type coal-fired internal combustion generator, comprising a coalifier, a main cylinder, a base and a control system;

[0006] A starter motor and a generator body are arranged on the machine base, a gear pump is arranged inside the machine base, a rotating shaft of the gear pump extends to the outside of the machine base and is drivingly connected to the generator body and the starter motor, a medium inlet, a medium outlet, a medium return port and a medium discharge port are arranged on the machine base, the medium inlet and the medium outlet are communicated with the inlet of the gear pump and the outlet of the gear pump respectively, and a first one-way valve and a second one-way valve are arranged at the medium inlet and the medium outlet respectively, the medium return port is arranged between the medium inlet and the inlet of the gear pump, a first closing valve for opening / closing the medium return port is arranged at the medium return port, the medium discharge port is arranged between the medium outlet and the outlet of the gear pump, and a second closing valve for opening / closing the medium discharge port is arranged at the medium discharge port;

[0007] The master cylinder is arranged on the machine base, and is provided with an air inlet and an exhaust port. A working piston and a piston sleeve are arranged in the cavity of the master cylinder, and the working piston divides the cavity of the master cylinder into a combustion chamber and a buffer chamber arranged along the sliding direction of the working piston; a pressure sensor, a fuel injector and an igniter are arranged on the top of the combustion chamber; the piston sleeve is slidably arranged in the buffer chamber along the sliding direction of the working piston, and a limiting step for limiting the sliding distance of the piston sleeve is arranged in the buffer chamber, the piston sleeve can realize the opening / closing of the air inlet and the exhaust port, an oxygen sensor is arranged at the exhaust port, and the medium reflux port and the medium outlet are both connected to the buffer chamber;

[0008] The coalifier is arranged at one end of the main cylinder away from the engine base, and the coalifier can spray coal powder into the combustion chamber;

[0009] The starter motor, the first closing valve, the second closing valve and the oxygen sensor are all connected to the control system signal.

[0010] In order to better implement the present invention, further optimization is made in the above structure, wherein the first closing valve includes a first valve body, a reset member and a locking assembly;

[0011] The first valve body is slidably disposed on the machine base along the axial direction of the medium return port, and the two ends of the reset member are respectively abutted against the first valve body and the machine base;

[0012] The locking assembly is arranged on the machine base, and the locking assembly is connected to the control system signal; when the medium return port is in an open state, the locking assembly can lock the state of the first valve body.

[0013] In order to better implement the present invention, further optimization is made in the above structure, wherein the second closing valve includes a second valve body and an opening and closing lever;

[0014] The second valve body is slidably disposed on the machine base along the axial direction of the medium discharge port;

[0015] The middle part of the opening and closing lever is hinged on the machine base, and the two ends of the opening and closing lever are respectively hinged to the first valve body and the second valve body to realize the synchronous opening / closing of the medium return port and the medium discharge port.

[0016] In order to better realize the present invention, further optimization is made in the above structure, and a pneumatic motor and an energy storage flywheel are also arranged on the machine base;

[0017] The rotating shaft of the pneumatic motor is connected to the rotating shaft of the gear pump, and the gas inlet of the pneumatic motor is connected to the exhaust port;

[0018] The energy storage flywheel is arranged on the rotating shaft of the gear pump.

[0019] In order to better implement the present invention, further optimization is made in the above structure, the air inlet and the air outlet are both arranged on a side of the limiting step close to the machine base;

[0020] The side wall of the piston sleeve is provided with a perforation, and the piston sleeve is provided with an adsorption member that is adsorbed and matched with the working piston;

[0021] An air intake passage is provided in the working piston, and when the working piston and the piston sleeve are both located at the bottom of the cavity of the master cylinder, the air intake port is connected to the buffer chamber through the through hole and the air intake passage in sequence;

[0022] When the medium enters the buffer chamber from the medium outlet, the medium will push the working piston to slide toward the top of the cavity of the master cylinder. The working piston can drive the piston sleeve to slide to the limit step through the adsorption member, and the piston sleeve blocks the air inlet and the exhaust port.

[0023] In order to better realize the present invention, further optimization is made in the above structure. A limiting device is provided on the outer wall of the piston sleeve, and a limiting hole is provided on the side wall of the cavity of the master cylinder. When the piston sleeve slides to the limiting step, the limiting end of the limiting device is clamped at the limiting hole.

[0024] In order to better realize the present invention, further optimization is made in the above structure, the coalifier includes a shell, a valve piston and a gas supply assembly;

[0025] The housing is arranged at one end of the main cylinder away from the base, a valve seat is arranged at one end of the housing facing the main cylinder, a pulverized coal funnel is arranged at one end of the housing away from the main cylinder, an intake cylinder is arranged in the housing, and a gas inlet and a gas outlet are arranged on the side wall of the intake cylinder;

[0026] The valve piston is arranged in the housing, and the valve piston can realize the opening / closing of the valve seat, the gas inlet and the gas outlet. A preheating chamber is arranged inside the valve piston, a coal powder filling port is arranged at the top of the preheating chamber, and a coal powder spraying port is arranged at the bottom of the preheating chamber. When the valve seat is in an open state, the coal powder funnel is connected with the preheating chamber, and the coal powder in the coal powder funnel can enter the preheating chamber and enter the cavity of the master cylinder through the preheating chamber.

[0027] The gas outlet end of the gas supply component is communicated with the gas inlet, and the gas outlet is communicated with the preheating chamber.

[0028] In order to better implement the present invention, further optimization is made in the above structure, and a heating device is provided in the circumference of the valve piston, and the heating device is connected to the control system signal.

[0029] In order to better implement the present invention, further optimization is made in the above structure. A return spring is arranged on the housing, and two ends of the return spring are respectively abutted against the housing and the valve piston.

[0030] In order to better realize the present invention, the above structure is further optimized, and an air intake lever is provided on the housing, and the middle part of the air intake lever is hinged on the housing;

[0031] The gas supply assembly includes an on-off valve, and the gas supply device is connected to the gas inlet through the on-off valve;

[0032] The two ends of the air intake lever are respectively hinged to the valve piston and the valve core of the opening and closing valve.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The main cylinder in the piston-type coal-fired internal combustion generator provided by the present invention can provide a closed working space for coal powder combustion, so as to ensure that the coal powder can burn slowly and fully in the main cylinder, thereby improving combustion efficiency and reducing heat energy loss; the high-pressure gas generated when the coal powder burns and works can push the working piston to move, so that the medium in the buffer chamber can enter the gear pump under the push of the working piston to drive the gear pump to move, so as to drive the generator body to rotate through the gear pump to generate electricity. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of a piston-type coal-fired internal combustion generator provided by the present invention;

[0037] Figure 2 It is a front view of a base of a piston-type coal-fired internal combustion generator provided by the present invention;

[0038] Figure 3 It is a back view of a base of a piston-type coal-fired internal combustion generator provided by the present invention;

[0039] Figure 4 It is a cross-sectional view of a piston-type coal-fired internal combustion generator provided by the present invention when it is in a liquid-filled state;

[0040] Figure 5 It is a cross-sectional view of a seat of a piston-type coal-fired internal combustion generator provided by the present invention when it is in a liquid-filled state;

[0041] Figure 6 It is a cross-sectional view of a main cylinder of a piston-type coal-fired internal combustion generator provided by the present invention when it is in a liquid-filled state;

[0042] Figure 7 It is a cross-sectional view of a coalifier of a piston-type coal-fired internal combustion generator provided by the present invention when it is in a liquid-filled state;

[0043] Figure 8 It is a cross-sectional view of a piston-type coal-fired internal combustion generator provided by the present invention when it is in an intake state;

[0044] Fig. 9 It is a cross-sectional view of a seat of a piston-type coal-fired internal combustion generator provided by the present invention when it is in an intake state;

[0045] Fig.10 It is a cross-sectional view of a main cylinder of a piston-type coal-fired internal combustion generator provided by the present invention when it is in an intake state;

[0046] Fig.11 It is a cross-sectional view of a coalifier of a piston-type coal-fired internal combustion generator provided by the present invention when it is in an intake state;

[0047] Fig.12 It is a cross-sectional view of a casing in a piston-type coal-fired internal combustion generator provided by the present invention;

[0048] Fig.13 It is a cross-sectional view of a valve piston in a piston-type coal-fired internal combustion generator provided by the present invention;

[0049] Fig.14 It is a structural schematic diagram of a first closing valve in a piston-type coal-fired internal combustion generator provided by the present invention;

[0050] Fig.15 It is a structural schematic diagram of a second closing valve in a piston-type coal-fired internal combustion generator provided by the present invention.

[0051] In the figure:

[0052] 1. Machine base; 11. Gear pump; 121. Medium inlet; 122. Medium outlet; 123. Medium return port; 124. Medium discharge port; 131. First one-way valve; 132. Second one-way valve; 141. First closing valve; 1411. First valve body; 1412. Reset member; 1413. Locking assembly; 142. Second closing valve; 1421. Second valve body; 1422. Opening and closing lever; 15. Pneumatic motor; 16. Energy storage flywheel; 17. Generator body; 18. Starting motor;

[0053] 2. Master cylinder; 211. Air inlet; 212. Exhaust port; 22. Working piston; 221. Air inlet passage; 23. Piston sleeve; 231. Perforation; 232. Limiting device; 24. Pressure sensor; 25. Fuel injector; 26. Ignitor; 27. Oxygen sensor;

[0054] 3. Coalizer; 31. Shell; 311. Valve seat; 312. Coal powder funnel; 313. Intake cylinder; 314. Return spring; 315. Intake lever; 32. Valve piston; 321. Preheating chamber; 322. Coal powder filling port; 323. Coal powder spraying port; 324. Heating device; 325. Air inlet hole; 33. Air supply assembly; 331. Opening and closing valve. DETAILED DESCRIPTION

[0055] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0056] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In the embodiments provided in this application, Figures 1 to 15 As shown, the piston-type coal-fired internal combustion generator includes a coalifier 3, a main cylinder 2, a base 1 and a control system (not shown in the figure);

[0059] A starter motor 18 and a generator body 17 are arranged on the machine base 1, a gear pump 11 is arranged inside the machine base 1, a rotating shaft of the gear pump 11 extends to the outside of the machine base 1 and is drivingly connected with the generator body 17 and the starter motor 18, a medium inlet 121, a medium outlet 122, a medium return port 123 and a medium discharge port 124 are arranged on the machine base 1, the medium inlet 121 and the medium outlet 122 are respectively communicated with the inlet of the gear pump 11 and the outlet of the gear pump 11, and a first check valve 131 and a second check valve 132 are respectively arranged at the medium inlet 121 and the medium outlet 122, the medium return port 123 is arranged between the medium inlet 121 and the inlet of the gear pump 11, a first closing valve for opening / closing the medium return port 123 is arranged at the medium return port 123, the medium discharge port 124 is arranged between the medium outlet 122 and the outlet of the gear pump 11, and a second closing valve 142 for opening / closing the medium discharge port 124 is arranged at the medium discharge port 124;

[0060] The main cylinder 2 is arranged on the machine base 1, and is provided with an air inlet 211 and an exhaust port 212. A working piston 22 and a piston sleeve 23 are arranged in the cavity of the main cylinder 2. The working piston 22 divides the cavity of the main cylinder 2 into a combustion chamber and a buffer chamber arranged along the sliding direction of the working piston 22; a pressure sensor 24, a fuel injector 25 and an igniter 26 are arranged on the top of the combustion chamber; the piston sleeve 23 is slidably arranged in the buffer chamber along the sliding direction of the working piston 22, and a limiting step for limiting the sliding distance of the piston sleeve 23 is arranged in the buffer chamber, the piston sleeve 23 can realize the opening / closing of the air inlet 211 and the exhaust port 212, an oxygen sensor 27 is arranged at the exhaust port 212, and the medium reflux port 123 and the medium outlet 122 are both connected to the buffer chamber;

[0061] The coalifier 3 is arranged at one end of the main cylinder 2 away from the engine base 1, and the coalifier 3 can spray coal powder into the combustion chamber;

[0062] The starter motor 18, the first closing valve, the second closing valve 142 and the oxygen sensor 27 are all connected to the control system signal.

[0063] The piston-type coal-fired internal combustion generator is mainly composed of the working piston 22 in the main cylinder 2 and the gear pump 11 in the base 1 working together. The working medium is liquid and gas, and the main combustion fuel is coal powder, coal slurry and dust fuel. In this embodiment, coal powder is used as fuel. According to the working principle and structural characteristics of the piston-type coal-fired internal combustion generator, the following implementation plan is adopted:

[0064] When the piston-type coal-fired internal combustion generator needs to be started, the staff can control the starter motor 18 through the control system to drive the gear pump 11 to rotate. At this time, the medium return port 123 and the medium discharge port 124 are both in a closed state. Figure 4 and Figure 5 , the liquid enters the base 1 through the medium inlet 121, and is sent into the buffer chamber through the medium outlet 122 under the action of the gear pump 11;

[0065] In the cold engine state, the air pressure in the buffer chamber is the same as that in the combustion chamber. The working piston 22 and the piston sleeve 23 can move toward the top of the cavity of the master cylinder 2 under the push of the liquid sent by the gear pump 11. When the piston sleeve 23 moves to the limit step, the piston sleeve 23 stops moving under the restriction of the limit step. At this time, the piston sleeve 23 blocks the air inlet 211 and the exhaust port 212, and the working piston 22 will continue to move toward the top of the cavity of the master cylinder 2 under the push of the liquid. See Figure 4 and Figure 6 , to compress the air in the combustion chamber;

[0066] When the gas pressure in the combustion chamber reaches the set pressure of the pressure sensor 24, the pressure sensor 24 will send a pressure signal to the control system. When the control system receives the pressure signal, it will send a start signal to the fuel injector 25 and the igniter 26, so that the igniter 26 ignites the fuel injected into the combustion chamber by the fuel injector 25, so that the fuel explodes in the combustion chamber to complete the ignition work. After the ignition work is completed, the fuel injector 25 is closed and no longer sprays fuel into the combustion chamber.

[0067] When the fuel explodes in the combustion chamber, high-pressure gas is generated. The high-pressure gas pushes the working piston 22 to the bottom of the cavity of the main cylinder 2. When the working piston 22 moves downward, it squeezes the liquid in the buffer chamber. The squeezed liquid pushes open the first closing valve 141 and enters the gear pump 11 through the medium return port 123. Fig. 9, pushing the gear in the gear pump 11 to rotate, so as to drive the generator body 17 to rotate through the rotating shaft of the gear pump 11 to generate electricity. At the same time, the second closing valve 142 will also act to open the medium discharge port 124, and the liquid passing through the gear pump 11 will be discharged outward through the medium discharge port 124;

[0068] When the liquid in the buffer chamber is completely pushed into the base 1 by the working piston 22, the working piston 22 will drive the piston sleeve 23 to move to the bottom of the cavity of the main cylinder 2, see Fig.10 At this time, the air inlet 211 and the exhaust port 212 are both in an open state, and the high-pressure gas in the combustion chamber will be discharged outward through the exhaust port 212. After the liquid in the base 1 is discharged outward from the medium discharge port 124, the gear pump 11 will be in a negative pressure state, and the external air will enter the base 1 through the air inlet 211. After the gear pump 11 is pressurized, it will enter the storage device through the medium discharge port 124 for storage and standby.

[0069] When the high-pressure gas in the combustion chamber is discharged, the combustion chamber will become a negative pressure state, so that the valve piston 32 in the pyrolyzer 3 is sucked downward, and the valve seat 311 is opened. Figure 8 and Fig.11 , coal powder and fresh air will enter the combustion chamber through the valve seat 311; and when the oxygen sensor 27 detects that there is oxygen in the combustion chamber (fresh air entering the combustion chamber through the valve seat 311), the oxygen sensor 27 will send an oxygen signal to the control system. After the control system receives the oxygen signal, the control system will control the first closing valve 141 and the second closing valve 142 to operate, so as to close the medium return port 123 and the medium discharge port 124. The liquid enters the base 1 from the medium inlet 121 again, and under the inertia of the gear pump 11, it will be pressurized by the gear pump 11 and enter the buffer chamber from the medium outlet 122 to push the working piston 22 upward. This repeated cycle drives the generator body 17 to generate electricity.

[0070] The main cylinder 2 in the piston-type coal-fired internal combustion generator can provide a closed working space for coal powder combustion to ensure that coal powder can burn slowly and fully in the main cylinder 2, thereby improving combustion efficiency and reducing heat energy loss; the high-pressure gas generated when coal powder burns can push the working piston 22 to move, so that the medium in the buffer chamber can enter the gear pump 11 under the push of the working piston 22 to drive the gear pump 11 to move, so as to drive the generator body 17 to rotate through the gear pump 11 to generate electricity.

[0071] It should be noted that a gas-liquid separator is provided at the medium discharge port 124, and liquid and gas can be separated through the medium discharge port 124 and enter the liquid storage device and the gas storage device for reuse;

[0072] The above-mentioned gear pump 11 is only one implementation method in the embodiment. According to this principle, a positive displacement motor and a positive displacement pump can be used to replace the gear pump 11.

[0073] In some embodiments, the base 1 is also provided with a pneumatic motor 15 and an energy storage flywheel 16, see Figure 1 , Figure 2 and Figure 3 ;in,

[0074] The rotating shaft of the pneumatic motor 15 is connected to the rotating shaft of the gear pump 11, and the gas inlet of the pneumatic motor 15 is connected to the exhaust port 212 through the filter;

[0075] The energy storage flywheel 16 is arranged on the rotating shaft of the gear pump 11;

[0076] When the liquid in the buffer chamber is completely pushed into the base 1 by the working piston 22, the air inlet 211 and the exhaust port 212 are both in an open state, and the high-pressure gas in the combustion chamber will enter the pneumatic motor 15 from the exhaust port 212 to drive the pneumatic motor 15 to operate. At this time, the pneumatic motor 15 will drive the rotating shaft of the gear pump 11 to operate, so as to drive the energy storage flywheel 16 to continue to work, and drive other equipment to work through the energy storage flywheel 16 to improve energy utilization.

[0077] In some embodiments, the first closing valve 141 includes a first valve body 1411, a reset member 1412 and a locking assembly 1413, see Fig. 9 and Fig.14 ;in,

[0078] The first valve body 1411 is slidably disposed on the machine base 1 along the axial direction of the medium return port 123, and both ends of the reset member 1412 are respectively disposed on the first valve body 1411 and the machine base 1;

[0079] The locking component 1413 is arranged on the base 1, and the locking component 1413 is connected to the control system signal;

[0080] When the medium return port 123 is in an open state, the locking assembly 1413 can lock the state of the first valve body 1411. Fig. 9 When the oxygen sensor 27 detects that there is oxygen in the combustion chamber, the control system controls the locking assembly 1413 to unlock, and the first valve body 1411 moves toward the medium return port 123 under the action of the restoring force of the reset member 1412 until the medium return port 123 is blocked. Figure 5 , to close the medium return port 123.

[0081] Preferably, the locking assembly comprises an electromagnet, a magnet A and a magnet B; wherein,

[0082] One end of the electromagnet is hinged on the base 1, and the electromagnet is connected to the control system signal, and the control system is used to realize the on / off power of the electromagnet and the switching of the current direction;

[0083] The magnet A is arranged at one end of the first valve body 1411 away from the medium return port 123, the magnet B is arranged on the base 1, and the electromagnet is located between the magnet A and the magnet B;

[0084] When the medium return port 123 is in an open state, the electromagnet can absorb the first valve body 1411 to fix the position of the first valve body 1411 to maintain the open state of the medium return port 123;

[0085] When it is necessary to close the medium return port 123, the control system will switch the current direction of the electromagnet to separate the electromagnet from magnet A, and move it in the direction of magnet B under the action of magnetic force until the electromagnet and magnet B are adsorbed and cooperated. The first valve body 1411 loses the adsorption effect of the electromagnet and moves toward the medium return port 123 under the action of the reset member 1412 until the medium return port 123 is blocked, thereby achieving the closure of the medium return port 123.

[0086] In some embodiments, the second closing valve 142 includes a second valve body 1421 and an opening and closing lever 1422, see Fig. 9 and Fig.15 ;in,

[0087] The second valve body 1421 is slidably disposed on the base 1 along the axial direction of the medium discharge port 124;

[0088] The middle part of the opening and closing lever 1422 is hinged on the machine base 1, and the two ends of the opening and closing lever 1422 are hinged to the first valve body 1411 and the second valve body 1421 respectively;

[0089] When the liquid is pressurized by the working piston 22 and pushes the first closing valve 141 open, the first valve body 1411 will synchronously drive the second valve body 1421 to move through the opening and closing lever 1422, so that the medium discharge port 124 is also opened. Figure 8 and Fig. 9 ;

[0090] When the control system controls the locking assembly 1413 to unlock, the first valve body 1411 moves under the restoring force of the reset member 1412 and closes the medium return port 123. The first valve body 1411 will synchronously drive the second valve body 1421 to move through the opening and closing lever 1422, so that the medium discharge port 124 is also closed. Figure 4 and Figure 5 .

[0091] In some embodiments, the air inlet 211 and the air outlet 212 are both arranged on a side of the limiting step close to the base 1;

[0092] A perforation 231 is provided on the side wall of the piston sleeve 23, and an adsorption member (not shown in the figure) which is adsorbed and matched with the working piston 22 is provided on the piston sleeve 23;

[0093] The working piston 22 is provided with an air intake passage 221. When the working piston 22 and the piston sleeve 23 are both located at the bottom of the cavity of the master cylinder 2, Fig.10 , the air inlet 211 is connected to the buffer chamber through the through hole 231 and the air inlet channel 221 in sequence;

[0094] When the liquid enters the buffer chamber from the medium outlet 122, the liquid pushes the working piston 22 to slide toward the top of the cavity of the main cylinder 2. Under the action of the adsorption member, the working piston 22 can drive the piston sleeve 23 to slide to the limit step, see Figure 6 The piston sleeve 23 is used to block the air inlet 211 and the air outlet 212 .

[0095] In some embodiments, a limiting device 232 is provided on the outer wall of the piston sleeve 23, and a limiting hole is provided on the side wall of the cavity of the master cylinder 2. When the piston sleeve 23 slides to the limiting step, the limiting end of the limiting device 232 is clamped at the limiting hole, and the limiting step will limit the piston sleeve 23 from continuing to slide at the top of the cavity of the master cylinder 2. See again Figure 6 , and the working piston 22 will continue to move under the push of the liquid, so that the working piston 22 and the piston sleeve 23 are separated;

[0096] After the working piston 22 and the piston sleeve 23 are separated, the cooperation between the limiting device 232 and the limiting hole can prevent the piston sleeve 23 from slipping and causing the air inlet 211 and the exhaust port 212 to open, and the liquid in the buffer chamber to be discharged outward from the air inlet 211 and the exhaust port 212.

[0097] In some embodiments, the coalifier 3 includes a housing 31, a valve piston 32 and a gas supply assembly 33, see Figure 7 and Fig.11 ;in,

[0098] The housing 31 is arranged at one end of the main cylinder 2 away from the base 1, a valve seat 311 is arranged at one end of the housing 31 facing the main cylinder 2, a coal powder funnel 312 is arranged at one end of the housing 31 away from the main cylinder 2, a preparatory cavity is arranged between the coal powder funnel 312 and the valve seat 311, an air intake cylinder 313 is arranged in the housing 31, and a gas inlet and a gas outlet are arranged on the side wall of the air intake cylinder 313;

[0099] The valve piston 32 is arranged in the housing 31. The valve piston 32 can realize the opening / closing of the valve seat 311, the gas inlet, the gas outlet and the outlet of the coal powder funnel 312. A preheating chamber 321 is arranged inside the valve piston 32. A coal powder filling port 322 is arranged at the top of the preheating chamber 321. A coal powder spraying port 323 is arranged at the bottom of the preheating chamber 321.

[0100] When the valve seat 311 is in the closed state, Figure 7 As shown, the outlet of the coal powder hopper 312 is connected to the preparation chamber, and the coal powder will enter the preparation chamber for standby;

[0101] When the valve seat 311 is in the open state, Fig.11 As shown, the preparation chamber is connected with the preheating chamber 321 through the coal powder filling port 322, and the coal powder in the preparation chamber falls into the preheating chamber 321. At the same time, the sealing ball on the valve piston 32 can block the outlet of the coal powder funnel 312 to prevent excessive coal powder from entering the preheating chamber 321 and causing incomplete combustion.

[0102] The gas outlet end of the gas supply assembly 33 is connected to the gas inlet, and the gas outlet is connected to the preheating chamber 321, so that the pressurized gas can cooperate with the negative pressure in the main cylinder 2 to drive the valve piston 32 to move, ensure that the valve seat 311 is in an open state, and blow the coal powder in the preheating chamber 321 into the combustion chamber, so that the addition of coal powder is more convenient.

[0103] It is worth noting that the height of the gas inlet is greater than the height of the gas outlet, and a plurality of gas inlet holes 325 are provided on the valve piston 32;

[0104] When the high-pressure gas in the combustion chamber is discharged, the combustion chamber will become a negative pressure state, so that the valve piston 32 in the kerosene burner 3 is sucked downward. At this time, the gas inlet will be opened immediately, and the incoming pressurized gas (containing oxygen) will enter the combustion chamber through the multiple inlet holes 325 on the valve piston 32;

[0105] When the oxygen sensor 27 detects that there is oxygen in the combustion chamber, the oxygen sensor 27 will send an oxygen signal to the control system. After the control system receives the oxygen signal, the control system will control the first closing valve 141 and the second closing valve 142 to operate, so as to close the medium reflux port 123 and the medium discharge port 124. The liquid enters the base 1 from the medium inlet 121, and under the inertia of the gear pump 11, it will be pressurized by the gear pump 11 and enter the buffer chamber from the medium outlet 122 to push the working piston 22 and the piston sleeve 23 upward, so that the piston sleeve 23 closes the air inlet 211 and the exhaust port 212. At the same time, the valve piston 32 in the coalifier 3 will continue to move downward to open the gas outlet, and part of the pressurized gas will enter the preheating chamber 321 through the gas outlet, impacting the coal powder in the preheating chamber 321, so that the coal powder is sprayed into the combustion chamber.

[0106] In some embodiments, a heating device 324 is disposed around the valve piston 32. Fig.13 , the heating device 324 is connected to the control system signal;

[0107] When adding coal powder, the control system can control the operation of the heating device 324, and use the heating device 324 to heat the coal powder in the preheating chamber 321 to about 300°C (the preheating temperature is kept below the ignition point of the coal powder), so that the coal powder can burn quickly and fully when entering the cavity of the main cylinder 2, thereby improving the combustion efficiency.

[0108] In some embodiments, the housing 31 is provided with a return spring 314, see Fig.12 , the two ends of the return spring 314 are respectively disposed on the housing 31 and the valve piston 32;

[0109] When the negative pressure in the cavity of the master cylinder 2 is eliminated, the pressure of the pressurized gas is less than the restoring force of the return spring 314. At this time, the return spring 314 can push the valve piston 32 to return, so that the valve piston 32 is close to the valve seat 311, thereby closing the master cylinder 2.

[0110] In some embodiments, the housing 31 is provided with an air intake lever 315, and the middle portion of the air intake lever 315 is hinged to the housing 31. Figure 7 and Fig.11 ;

[0111] The gas supply assembly 33 includes an on-off valve 331, and the gas supply device is connected to the gas inlet through the on-off valve 331;

[0112] The two ends of the air intake lever 315 are respectively hinged to the valve piston 32 and the valve core of the opening and closing valve 331. When the valve piston 32 is adsorbed by the negative pressure in the main cylinder 2 and moves into the cavity of the main cylinder 2, the valve piston 32 will drive the opening and closing valve 331 to move through the air intake lever 315, so that the opening and closing valve 331 opens, and the pressurized gas in the gas source can enter the shell 31 through the opening and closing valve 331 for preheating. The preheated pressurized gas can enter the preheating chamber 321 through the gas outlet, and blow the pulverized coal in the preheating chamber 321 into the cavity of the main cylinder 2.

[0113] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A piston-type coal-fired internal combustion generator, characterized in that: It comprises a coalifier (3), a main cylinder (2), a machine base (1) and a control system; The base (1) is provided with a starter motor (18) and a generator body (17); a gear pump (11) is provided inside the base (1); a rotating shaft of the gear pump (11) extends to the outside of the base (1) and is drivingly connected to the generator body (17) and the starter motor (18); a medium inlet (121), a medium outlet (122), a medium return port (123) and a medium discharge port (124) are provided on the base (1); the medium inlet (121) and the medium outlet (122) are respectively connected to the inlet of the gear pump (11) and the outlet of the gear pump (11); and the medium A first one-way valve (131) and a second one-way valve (132) are respectively provided at the inlet (121) and the medium outlet (122); the medium return port (123) is provided between the medium inlet (121) and the inlet of the gear pump (11); a first closing valve (141) for opening / closing the medium return port (123) is provided at the medium return port (123); the medium discharge port (124) is provided between the medium outlet (122) and the outlet of the gear pump (11); a second closing valve (142) for opening / closing the medium discharge port (124) is provided at the medium discharge port (124); The master cylinder (2) is arranged on the machine base (1); an air inlet (211) and an air outlet (212) are arranged on the master cylinder (2); a working piston (22) and a piston sleeve (23) are arranged in the cavity of the master cylinder (2); the working piston (22) divides the cavity of the master cylinder (2) into a combustion chamber and a buffer chamber arranged along the sliding direction of the working piston (22); a pressure sensor (24), a fuel injector (25) and an igniter (26) are arranged on the top of the combustion chamber. The piston sleeve (23) is slidably arranged in the buffer chamber along the sliding direction of the working piston (22), and a limit step for limiting the sliding distance of the piston sleeve (23) is arranged in the buffer chamber. The piston sleeve (23) can realize the opening / closing of the air inlet (211) and the exhaust port (212). An oxygen sensor (27) is arranged at the exhaust port (212). The medium return port (123) and the medium outlet (122) are both connected to the buffer chamber; The coal pulverizer (3) is arranged at one end of the main cylinder (2) away from the engine base (1), and the coal pulverizer (3) is capable of spraying coal powder into the combustion chamber; The starter motor (18), the first closing valve (141), the second closing valve (142) and the oxygen sensor (27) are all connected to the control system signal.

2. The piston-type coal-fired internal combustion generator according to claim 1, characterized in that: The first closing valve (141) comprises a first valve body (1411), a reset member (1412) and a locking assembly (1413); The first valve body (1411) is slidably disposed on the machine base (1) along the axial direction of the medium return port (123), and two ends of the reset member (1412) are respectively abutted against the first valve body (1411) and the machine base (1); The locking component (1413) is arranged on the machine base (1), and the locking component (1413) is connected to the control system signal; when the medium return port (123) is in an open state, the locking component (1413) can lock the state of the first valve body (1411).

3. The piston-type coal-fired internal combustion generator according to claim 2, characterized in that: The second closing valve (142) comprises a second valve body (1421) and an opening and closing lever (1422); The second valve body (1421) is slidably disposed on the machine base (1) along the axial direction of the medium discharge port (124); The middle part of the opening and closing lever (1422) is hinged on the machine base (1), and the two ends of the opening and closing lever (1422) are respectively hinged to the first valve body (1411) and the second valve body (1421), so as to realize the synchronous opening / closing of the medium return port (123) and the medium discharge port (124).

4. The piston-type coal-fired internal combustion generator according to claim 3 is characterized in that: The machine base (1) is also provided with a pneumatic motor (15) and an energy storage flywheel (16); The rotating shaft of the pneumatic motor (15) is connected to the rotating shaft of the gear pump (11), and the gas inlet of the pneumatic motor (15) is connected to the exhaust port (212); The energy storage flywheel (16) is arranged on the rotating shaft of the gear pump (11).

5. The piston-type coal-fired internal combustion generator according to claim 1, characterized in that: The air inlet (211) and the air outlet (212) are both arranged on a side of the limiting step close to the machine base (1); A perforation (231) is provided on the side wall of the piston sleeve (23), and an adsorption member that adsorbs and cooperates with the working piston (22) is provided on the piston sleeve (23); An air intake passage (221) is provided in the working piston (22); when the working piston (22) and the piston sleeve (23) are both located at the bottom of the cavity of the master cylinder (2), the air intake port (211) is connected to the medium return port (123) via the through hole (231) and the air intake passage (221) in sequence; When the medium enters the buffer chamber from the medium outlet (122), the medium pushes the working piston (22) to slide toward the top of the cavity of the master cylinder (2), and the working piston (22) can drive the piston sleeve (23) to slide to the limit step through the adsorption member, and the piston sleeve (23) blocks the air inlet (211) and the exhaust port (212).

6. The piston-type coal-fired internal combustion generator according to claim 5, characterized in that: The outer wall of the piston sleeve (23) is provided with a limiting device (232), and the side wall of the cavity of the master cylinder (2) is provided with a limiting hole. When the piston sleeve (23) slides to the limiting step, the limiting end of the limiting device (232) is clamped at the limiting hole.

7. The piston-type coal-fired internal combustion generator according to claim 1, characterized in that: The coalifier (3) comprises a shell (31), a valve piston (32) and a gas supply assembly (33); The housing (31) is arranged at one end of the main cylinder (2) away from the machine base (1); a valve seat (311) is arranged at one end of the housing (31) facing the main cylinder (2); a pulverized coal funnel (312) is arranged at one end of the housing (31) away from the main cylinder (2); an intake cylinder (313) is arranged inside the housing (31); a gas inlet and a gas outlet are arranged on a side wall of the intake cylinder (313); The valve piston (32) is arranged in the housing (31), and the valve piston (32) can realize the opening / closing of the valve seat (311), the gas inlet and the gas outlet. A preheating chamber (321) is arranged inside the valve piston (32), a coal powder filling port (322) is arranged at the top of the preheating chamber (321), and a coal powder spraying port (323) is arranged at the bottom of the preheating chamber (321). When the valve seat (311) is in an open state, the coal powder funnel (312) is connected with the preheating chamber (321), and the coal powder in the coal powder funnel (312) can enter the preheating chamber (321), and enter the cavity of the master cylinder (2) through the preheating chamber (321); The gas outlet end of the gas supply component (33) is in communication with the gas inlet, and the gas outlet is in communication with the preheating chamber (321).

8. The piston-type coal-fired internal combustion generator according to claim 7, characterized in that: A heating device (324) is provided in the circumference of the valve piston (32), and the heating device (324) is connected to the control system signal.

9. The piston-type coal-fired internal combustion generator according to claim 7, characterized in that: The housing (31) is provided with a return spring (314), and two ends of the return spring (314) are respectively abutted against the housing (31) and the valve piston (32).

10. The piston-type coal-fired internal combustion generator according to claim 9, characterized in that: An air intake lever (315) is provided on the housing (31), and a middle portion of the air intake lever (315) is hinged on the housing (31); The gas supply component (33) comprises an on-off valve (331), and the gas supply device is connected to the gas inlet through the on-off valve (331); The two ends of the air intake lever (315) are respectively hinged to the valve piston (32) and the valve core of the opening and closing valve (331).

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