59results about "Chamber doors" patented technology

The utility model relates to the technical field of combustion furnaces, in particular to a pneumatic furnace door pressing structure which comprises a supporting frame, a furnace door used for sealing a furnace body is arranged on the supporting frame in a sliding mode, a hoisting mechanism used for hoisting the furnace door is arranged on the upper end face of the supporting frame, and first pressing mechanisms are arranged at the upper end and the lower end of one side of the furnace body. The supporting frame is provided with a second pressing mechanism used in cooperation with the first pressing mechanism. A buffer mechanism in contact with the furnace door is arranged below the support frame; the first pressing mechanism comprises a first air cylinder and a push plate connected with the telescopic end of the first air cylinder and used for pressing the furnace door, the second pressing mechanism comprises a second air cylinder and a pressing rod connected with the telescopic end of the second air cylinder, and the pressing rod penetrates through the push plate. The pressing effect at the opening of the furnace body of the furnace door can be greatly improved, the sealing effect is further improved, the run-out phenomenon is prevented, the buffer structure at the bottom is used for buffering the furnace door when the weight of the furnace door is reduced, and the situation that the lower end face of the furnace door directly falls and deforms is prevented.

The utility model discloses a heat insulation type boiler door structure, which relates to the technical field of boiler doors and is technically characterized by comprising a four-hole boiler mounting plate, the boiler door body is mounted on the outer side of the four-hole boiler mounting plate, and has the technical effects that the boiler door body structure is arranged, so that the effects of internal and external heat insulation and vacuum heat insulation are achieved, and the overall heat insulation performance is effectively improved; a cast iron furnace door shell of the boiler door body is movably installed on the rotary opening and closing mechanism through a positioning shaft hole, so that the cast iron furnace door shell is convenient to movably open and close, a cross-shaped heat insulation panel can be separated in the cast iron furnace door shell, a heat insulation vacuum cavity is formed in the inner side of the cross-shaped heat insulation panel, and effective vacuum heat insulation can be achieved through the heat insulation vacuum cavity. The two ends of the cross-shaped heat insulation panel are sleeved with the ceramic fiber panels, and the ceramic fiber panels have a good heat insulation effect and are in a honeycomb state, so that the heat insulation effect is effectively improved.

The utility model provides a pneumatic isolation door which comprises a boiler reinforcing body and a rear heat resisting shell, a set of isolation door bodies used for being mutually sealed and embedded with sealing doors are arranged on the left side of the lower end of the boiler reinforcing body, and a set of sealing doors used for closing the isolation door bodies are arranged on the inner sides of the isolation door bodies. A group of boiler bodies used for boiler operation are arranged on the rear side of the boiler reinforcing body, and a group of supporting seats used for supporting the boiler bodies are arranged at the lower ends of the boiler bodies. Combustion waste gas in the boiler body is exhausted through the exhaust guide pipe, the angle of the sealing door is adjusted through the rear limiting frame, the sealing door is turned over rightwards in an inclined mode through starting, and the motor is used for providing driving wheel power for the driving wheel and stretching the pneumatic rod to extend.

The utility model discloses a general type steam boiler, including the furnace shell, the lateral surface of furnace shell is passed through movable joint and has the sealing door cover, the lateral surface of furnace shell is erected and has the movable joint of air -blower, the upper end movable joint of furnace shell has the sealing cover, the lower extreme fixed connection of furnace shell has a plurality of base, the lateral surface fixed connection of sealing door cover has the first handle, the lateral surface fixed connection of furnace shell has the symmetry of rotary seat, the inside fixed connection of furnace shell has the symmetry of limit slot, movable joint in limit slot between furnace jar, the upper end of furnace shell is equipped with the heat dissipation hole, the sealing cover movable connection in heat dissipation hole, the lower extreme of furnace shell is passed through movable joint and has the steam stove, the lower extreme fixed connection of furnace shell has the sealing shell, the other side fixed connection of furnace shell is passed through and has the exhaust pipe. Through above -mentioned structure, can easily overhaul and maintain furnace jar, ensure that boiler operation is safe and stable, and simple and efficient operation enhances fuel combustion efficiency.

The utility model relates to the technical field of drainage and deslagging door devices, in particular to a drainage and deslagging door device capable of being replaced online, which comprises a seat frame, a pushing mechanism is fixedly mounted on the surface of the seat frame, a drainage door body is fixedly mounted at the output end of the pushing mechanism, and a water collecting tank is fixedly mounted on the surface of the seat frame. A drainage pipe is fixedly mounted at the bottom of the water collecting tank, and the drainage door body comprises a slag discharge door plate, a water storage chamber, a conical drainage device and a lengthened drainage port. According to the utility model, the slag discharge door plate is made of Cr26 high-wear-resistant alloy steel and has excellent wear resistance and corrosion resistance, the conical water separating device is made of stainless steel 316 and is mounted in a matching manner at an angle of 35 degrees, and an assembly gap of 1mm is kept between the conical water separating device and the slag discharge door plate, so that the slag-water separating efficiency is effectively improved; and ash is prevented from blocking a net taking opening of the water storage chamber and a special opening device, so that the conical water separating device can be quickly replaced on line, and the downtime of equipment is remarkably shortened.

The utility model discloses an ash leakage prevention inspection door suitable for positive pressure operation, which comprises a furnace door seat, a furnace door cover, a support and a refractory part, the refractory part is mounted on the furnace door cover, and the furnace door cover is mounted in the furnace door seat; one end of the support is hinged to one side of the furnace door base, the other end of the support is detachably installed on the other side of the furnace door base, and the pressing wheel is arranged in the middle of the support and used for fastening the furnace door base and the furnace door cover. A groove and a sealing boss are installed between the furnace door base and the furnace door cover in a matched mode. The inspection door is arranged on the positive pressure flue, the structure of the inspection door is optimized, meanwhile, multiple sealing means and a convenient opening mode are achieved, a groove and a sealing boss are deepened, sealing filler is increased, the suspension direction of a pressing device is deepened, sealing performance and operability are achieved, the problem of smoke dust leakage during operation is solved, cleanliness of the site environment is protected, and the service life of the inspection door is prolonged. And the personal safety of maintenance personnel is ensured.

The utility model discloses an inlet door structure of a tiny-oil ignition air heater of a boiler, and relates to the technical field of boiler pipelines, in particular to the inlet door structure of the tiny-oil ignition air heater of the boiler. Comprising a door frame, an inserting plate door, a support, an air cylinder, a front baffle, a rear baffle, a purging pipeline and the like. Sliding grooves are formed in the left inner side and the right inner side of the door frame. The inserting plate door is slidably installed through the sliding grooves to control opening and closing of the air heater inlet. And a piston rod of the cylinder is connected with the upper end of the slide plate gate to realize automatic control. A front baffle and a rear baffle are arranged in front of and behind the lower frame of the door frame, and the blowing pipeline at the bottom of one side penetrates to the middle of the front baffle and the rear baffle. According to the utility model, the blowing pipeline is additionally arranged, so that the ash deposition resistance can be reduced by blowing before switching operation, and uncompleted jamming is avoided; the air cylinder is moved to the upper portion, the top is connected with the insertion plate door, the insertion plate door is evenly stressed, and inclination and related problems are prevented.

The utility model provides a combustion hearth which is characterized in that the combustion hearth comprises an inner furnace barrel, an outer furnace barrel, a fire grate, an air inlet assembly and an ash removal assembly, the inner furnace barrel is arranged in the outer furnace barrel, and a first gap is reserved between the inner wall of the inner furnace barrel and the inner wall of the outer furnace barrel. The fire grate is connected to the bottom of the inner furnace barrel and divides the outer furnace barrel into a main combustion chamber and an ash storage chamber. The air inlet assembly is arranged at the bottom of the outer furnace barrel and communicates with the lower portion of the inner furnace barrel, the air inlet assembly comprises an air inlet end and an air outlet end which are oppositely arranged in the extending direction of the air inlet assembly, and the air outlet direction of the air outlet end faces the fire grate. In the embodiment of the invention, the combustion hearth is provided with the inner furnace barrel and the outer furnace barrel, the fuel is combusted in the inner furnace barrel, and the combusted particles are blown out by the air inlet assembly and fall into the ash storage chamber below from the first gap between the inner furnace barrel and the outer furnace barrel, so that the content of dust entering a subsequent heat exchange device can be reduced to a greater extent; and the accumulation of combusted inorganic matters on the fire grate is less, and the probability of coking of the fire grate is lower.

The utility model discloses an adjustable mechanism of an energy-saving catalytic combustion furnace, which belongs to the technical field of combustion furnaces, and comprises a base, a motor is fixedly mounted at the top of the base, a furnace body is fixedly connected to the top end of an output shaft of the motor, the bottom of the furnace body is communicated with a waste gas box, a ventilation pipe is fixedly connected to the top of the waste gas box, and the ventilation pipe is fixedly connected to the bottom of the furnace body. A fixing plate is fixedly connected to the side face of the furnace body, a mounting base is fixedly connected to the top of the fixing plate, a fan is fixedly connected to the top of the mounting base, the side face of the fan is fixedly connected to one side of a ventilation pipe, a motor is controlled by a controller to work, the motor drives the furnace body to rotate, and the effect of adding materials from multiple directions can be achieved; by arranging the first catalysis plate and the second catalysis plate, waste gas can be converted more quickly, the working efficiency is improved, by rotating the second handle, the rotating shaft can drive the turning plate to rotate, the purpose that gas in the furnace body circulates quickly is achieved, and the catalysis effect is enhanced.

The utility model discloses a safety protection device and relates to the technical field of boiler equipment, the safety protection device is applied to a manhole door, the manhole door comprises a hinge part and a locking part, the hinge part is arranged at the edge of one end of the manhole door, and the locking part is arranged at the end, away from the hinge part, of the manhole door. The safety protection device comprises a protection plate, a connecting structure and a lock catch structure, and the connecting structure is arranged on one side of the protection plate and connected with the hinge part; the lock catch structure is arranged at the end, away from the connecting structure, of the protection plate and connected with the locking part. According to the manhole door, the connecting structure is connected with the hinge part of the manhole door, stable connection of the protection plate and the hinge part in the opening process of the manhole door is ensured, the protection purpose is achieved, the lock catch structure is connected with the locking part of the manhole door, and the situation that personnel open the protection plate at will to enter a hearth under the condition that safety disclosure is not conducted is prevented; and therefore, the protection safety of the protection plate is ensured.

The utility model provides a boiler fire observation door, and belongs to the technical field of boilers. The boiler fire observation door solves the problems that an existing boiler fire observation door is complex in structure and inconvenient to use. According to the boiler fire observation door, a shell is provided with an observation end and a mounting end, the observation end of the shell is provided with a flange connecting disc, a flange pressing disc is arranged on the opposite side of the flange connecting disc, a high-temperature-resistant glass plate is arranged between the flange connecting disc and the flange pressing disc, a rotating shaft is arranged in the shell, and the left end of the rotating shaft is inserted into a positioning groove; the right end of the rotating shaft penetrates through the mounting hole and the mounting sleeve and then extends out of the mounting sleeve, a handle is arranged at the right end of the rotating shaft, the bottom end of the mounting sleeve is filled with filler, a filler cover arranged on the rotating shaft in a sleeving mode is arranged in the mounting sleeve, and an isolation door plate with one end arranged on the rotating shaft in a sleeving mode and fixedly connected with the rotating shaft is arranged in the shell. The fire observation door is simple in structural design and convenient to operate, and meanwhile heat in the boiler can be prevented from leaking from the fire observation door.

The utility model provides a novel furnace cover, and belongs to the technical field of machinery. The problem of poor stability in the prior art is solved. The novel furnace cover comprises a disc-shaped body, an annular protruding connecting edge is arranged on the upper edge of the body, a cavity is formed in the body, heat insulation filler is arranged in the cavity, a concave cavity is formed in the inner side of the body, the novel furnace cover further comprises a connecting pipe, the middle of the connecting pipe is fixed to the body in a penetrating mode, and the inner end of the connecting pipe extends out of the inner side of the body. The outer end of the connecting pipe extends out of the body and is provided with a connector for being connected with a pressure gauge. The novel furnace cover is high in stability.

The invention relates to a liftable door (2) supporting mechanism (1) for grilling ovens that are intended for cooking food by retaining the heat produced by wood or coal combustion. The mechanism comprises two rigidly connected arms (1.1, 1.8), a primary arm (1.1) and another secondary arm (1.8), integrally rotating on respective rotation shafts (1.4) located on each side of the oven body, where an end of the secondary arm (1.8) is connected to the bottom of the door (2), and the opposite end of the assembly formed by both arms (1.1, 1.8) has a connecting rod (1.2) hinged to the primary arm (1.1) from which a counterweight (1.3) hangs. Thus, the assembly formed by both arms (1.1, 1.8) pivots on the rotation shaft (1.4), where the weight of the door (2) of the oven, at the end of the secondary arm (1.8), is held by the lever exerted on the rotation shaft (1.4) by the counterweight (1.3) that hangs from the primary arm (1.1).

The utility model discloses a self-locking boiler door, which relates to the technical field of boiler doors and is technically characterized by comprising a boiler door body. The furnace door rotating mechanism is fixedly connected to the outer wall of the furnace door body, and the other end of the furnace door rotating mechanism is fixedly connected with the boiler body; the protruding locking mechanisms are fixedly connected to the two ends of the furnace door body; and the locking limiting mechanism is located on the outer side of the protruding locking mechanism, and the locking limiting mechanism is installed on the boiler body. The technical effects are that the protruding locking mechanism is arranged, so that the boiler door body can automatically protrude when being locked, and the protruding locking mechanism can automatically protrude and be locked in the locking limiting mechanism; and the furnace door body is uniformly pressed when being closed, so that the furnace door body is tighter when being closed.

The firewood-burning gasification furnace comprises a gasification furnace body, a feeding port, a sealing door and a furnace opening, the feeding port is formed in one side of the gasification furnace body, a grate is arranged at the bottom end of the interior of the gasification furnace body, through holes are evenly formed in the bottom end of one side of the gasification furnace body, and the sealing door is arranged at the bottom end of the other side of the gasification furnace body. One side of the feeding port is connected with a sealing door through a hinge, a rolling shaft is arranged on the gasification furnace main body on one side of the feeding port through a bracket, connecting rods are arranged at the two ends of the rolling shaft, the connecting rods are uniformly connected with the sealing door through fixing pieces, and a driving motor is fixed at the top of the bracket; and the output end of the driving motor is connected with the rolling shaft. By installing the gasification furnace main body, the feeding hole, the sealing door, the bracket, the rolling shaft, the driving motor, the connecting rod and the fixing piece, a user does not need to touch the gasification furnace main body when adding fuel, so that the user is prevented from being scalded, and meanwhile, the pressing force of the sealing door is controlled through the torque of the driving motor, so that accidental opening is prevented.

The utility model discloses an improved gasification furnace ventilation fan which comprises a body, and a smoke pipe is connected to the surface of one side of the top of the body in a penetrating mode. An air bellow is fixedly installed on the surface of one side of the body, a fan is fixedly installed in the air bellow, installation parts are fixedly connected to the two sides of the fan, an air outlet pipe is fixedly installed on the surface of one side of the fan, and a conveying pipe is fixedly installed on the surface of the other side of the fan. An air inlet pipe is fixedly mounted on the surface of one side, far away from the fan and penetrating through the air bellow, of the conveying pipe; according to the fan, the filter part is arranged, so that dust in air can be filtered, the amount of dust entering the fan is reduced, the situation that a bearing and an impeller are damaged is reduced, and the service life of the fan can be prolonged to a certain extent; and the filter part can be more conveniently mounted and dismounted, so that the replacement efficiency of the filter part is improved.

Combustion chamber door (6) of a burner (2) of a heating appliance (1), comprising a fuel gas-air channel (9) which is integrated in the combustion chamber door (6) and opens on one side to an outer connection base (12) and on the other side to a combustion chamber (13) of the burner (2), characterized in that a gas throttle (7) with at least one externally adjustable throttle element (14) is formed in a fuel gas channel (8) formed in the connection base (12).

The present invention discloses a burner capable of realizing combustion monitoring and control, and relates to the technical field of burners, comprising a control box, a damper assembly and a burner body, wherein an air outlet is provided on the top of the control box, a telescopic tube is connected to the top of the air outlet, a sealing cover is connected to the top of the telescopic tube, a partition is installed inside the control box, an inner cavity of the control box above the partition forms a ventilation cavity, a filter is installed inside the ventilation cavity, and an air inlet pipe is installed on the side wall of the control box on one side of the ventilation cavity. By providing the ventilation cavity, the air inlet pipe and the air outlet pipe, the present invention can achieve the effect of mixing the ambient air inside and outside the room with the gas, provide a sufficient oxygen-containing environment for gas combustion, and enable the burner to be used safely in a room without ventilation; by providing the adjustment assembly, the limiting effect of the baffle on the existing damper structure is achieved, the paddle is automatically driven to move in the horizontal and vertical directions, and the air intake volume of the damper is adjusted according to actual conditions.

The utility model relates to a heating furnace for keeping dynamic stability of solid particles, and belongs to the field of heating furnaces. Comprising a base; the furnace body is arranged on the base and comprises a heating part and a sealing part, the heating part is provided with a first notch capable of being embedded into the sealing part, and at least one of the heating part and the sealing part moves relative to the base; the partition plate is fixed to the heating part and provided with a second notch; the loading container is arranged on the sealing part; a vacuum cavity is formed in the heating part between the first notch and the second notch; and a vacuum pump communicated with the vacuum cavity is fixed on the heating part. The sealing part is driven to move towards one side of the heating part and block the heating part to form a complete furnace body, after the first notch and the second notch in the heating part are blocked, the vacuum cavity in the middle forms a sealed cavity, the vacuum pump pumps air in the vacuum cavity away, an air partition is formed, and therefore the heating effect is improved. The energy consumption of the heating part is reduced, and meanwhile, the heat is prevented from diffusing to the sealing part, so that the heat can be prevented from escaping and hurting operators.

The utility model discloses a novel energy-saving type fire observation door special-shaped piece. Comprising a fire observation door brick, a fire observation opening formed in the fire observation door brick, a fire observation door plate movably arranged on the outer side of the fire observation door brick, a heat insulation screen arranged on the side, facing the fire observation door brick, of the fire observation door plate and used for being connected with the fire observation opening in an inserted mode, and a handle arranged on the side, away from the fire observation door brick, of the fire observation door plate, and further comprises a locking assembly. The locking assembly comprises locking tongues movably arranged on the periphery of the heat insulation screen, and locking grooves which are in one-to-one correspondence with the locking tongues and used for being connected with the locking tongues in an inserted mode are formed in the periphery of the inner side of the fire observation opening. According to the novel energy-saving type fire observation door special-shaped piece, the locking assembly and the handle are arranged in a linkage mode, unlocking can be achieved only by rotating the handle during opening, loosening can be achieved during fixing, a locking mechanism does not need to be operated independently, and convenience is improved.

The invention relates to a biomass boiler (1) with an exhaust gas duct (3) which, together with a combustion chamber (2), forms a hot gas zone. Outside the hot gas zone, a plasma chamber (5) is provided, connected to the exhaust gas duct (3), for generating a low-temperature plasma. A blower (6) is provided for generating a conveying flow (7) that passes through the plasma chamber (5) to convey the low-temperature plasma into the exhaust gas duct (3). The plasma chamber (5) is connected to an ambient air supply (10). To reduce potential odor emissions from existing biomass boilers (1) in a space-saving and retrofittable manner, it is proposed that the plasma chamber (5) be connected to the boiler housing (4) or supported by the exhaust gas duct (3).

The utility model relates to an inspection hole sealing device, and relates to the technical field of boiler equipment. An inspection hole sealing device is arranged on the side wall of boiler equipment, is used for sealing an inspection hole of a boiler and comprises a first fixing plate, a first sealing plate, a second sealing plate, a first limiting plate and a second limiting plate. The boiler inspection hole sealing device is simple in structure and convenient to install, the first sealing plate on the second sealing plate can seal the inspection hole by pressing the second sealing plate, the first sealing plate is a wool felt plate, the inspection hole of a boiler can be effectively sealed, dust leakage is avoided, and production efficiency and production safety are guaranteed.

The utility model relates to the technical field of boilers, in particular to a composite furnace door structure of a waste heat boiler, which comprises a fixed frame, a door plate, a fixed component, a rotating component and a mounting component. The fixing assembly comprises two fixing seats, two rotating lead screws, a lead screw sleeve and a positioning pin, the two fixing seats are fixedly connected with the door plate and located on the front face of the door plate, the two rotating lead screws are slidably connected with the fixing seats respectively, the lead screw sleeve is in threaded connection with the rotating lead screws, and the positioning pin is located on the right side of the door plate. The number of the positioning pins is two, the two positioning pins are fixedly connected with the rotating lead screw, the rotating assembly and the mounting assembly are connected with the fixing frame, and the problems that when the composite furnace door structure of the waste heat boiler is used, the furnace door panel is inconvenient to fix, the furnace door panel is prone to loosening, and the sealing effect of the furnace door panel is poor are solved.

The present invention provides a reciprocating grate biomass gasification combustion device, comprising a combustion chamber, a swirl burner head, a reciprocating grate water cooling device, a material discharge assembly, and a cooling and heat exchange device; the swirl burner head is communicated with the combustion chamber; the reciprocating grate water cooling device comprises a reciprocating grate frame; a static grate plate steel frame is provided on the reciprocating grate frame; a moving grate plate steel frame is provided on the reciprocating grate frame; a static grate plate steel frame has static grate plates; a moving grate plate steel frame has moving grate plates; connecting pipes are provided between the static grate plate steel frames; a water inlet joint and a water outlet joint are provided at both ends of the connecting pipe respectively; the cooling conversion device comprises a cold-heat converter and a tertiary air fan, the cold-heat converter is connected to the water inlet joint and the water outlet joint through a water pipe; the cold-heat converter is connected to the air duct through an air pipe; the cold-heat converter is connected to the material discharge assembly through a second air pipe; the tertiary air fan is on the second air pipe, which improves safety and reliability, and the cooling and heat exchange device saves energy.

The utility model discloses a waste heat boiler manhole door opening cooling pipe arrangement structure and relates to the technical field of waste heat boilers, a left cooling pipe and a right cooling pipe are close and parallel to each other and extend to the middle of the upper edge of a manhole door opening from top to bottom to be vertically bent, the left cooling pipe extends towards the left edge side of the manhole door opening, and the right cooling pipe extends towards the right edge side of the manhole door opening. The left cooling pipe and the right cooling pipe extend to the lower edge of the manhole door opening and obliquely extend to the lower portion of the middle of the lower edge of the manhole door opening. The damage rate of the cooling pipe can be reduced, and safe operation of the waste heat boiler is ensured.

The invention discloses a double-adjustment magnetic pre-tightening anti-explosion door device, and relates to the technical field of boiler anti-explosion doors, the double-adjustment magnetic pre-tightening anti-explosion door device comprises a boiler pipeline and a mounting bent seat welded on the boiler pipeline, the mounting bent seat is connected with a mounting seat, and the mounting seat is connected with a connecting cover; the device further comprises a first gland and a second gland. The first gland abuts against the opening edge of the mounting base, and a spring is arranged between the first gland and the top wall of the connecting cover. The second gland is arranged on the outer top wall of the connecting cover and connected with a magnet fixed to the outer top wall of the connecting cover in a magnetic attraction mode. The second gland is in threaded connection with a bolt, and the bolt penetrates through the top wall of the connecting cover to abut against the vertical rod on the top face of the first gland. The magnetic attraction force of the second gland and the magnet acts on the first gland through the bolt and the vertical rod, and then it is guaranteed that the first gland is stably sealed before the pressure of the pressure relief channel reaches the detonation threshold value. According to the anti-explosion door, the elastic force of the spring and the pre-tightening force of the magnet bolt are combined, so that the pressure relief channel can keep stable sealing when the detonation threshold value is not reached, leakage is effectively prevented, and the reliability of the anti-explosion door is improved.

The utility model discloses a boiler furnace door with protection structure relates to boiler furnace door technical field, and its technical key points include boiler body mounting seat, boiler sealing door board is installed and is connected on the outside of boiler body mounting seat, positioning opening and closing mechanism, positioning opening and closing mechanism installation is connected on the right side of boiler body mounting seat and boiler sealing door board, and is distributed up and down, cooling protection mechanism, cooling protection mechanism installation is connected in the inside of boiler sealing door board, cooling protection mechanism is cyclically connected to outside cooling equipment, and the technical effect is that cooling protection mechanism can receive the cooling medium of outside, thereby can carry out the cooling to boiler sealing door board, avoid the scalding of personnel and touch high temperature boiler sealing door board, and can effectively improve the sealing service life of boiler sealing door board.

The utility model provides a laboratory waste treatment device for microbiological research, and relates to the field of waste treatment. The top piece structure is installed at the top end of the device body, the top end of the top piece structure and the outer portion of the pipeline connecting position are sleeved with a sleeve piece, the sleeve piece made of rubber is of an annular structure, the upper side and the lower side of the interior of the sleeve piece are each provided with a blocking piece structure, and the blocking piece structures of the annular structures are made of flexible rubber. The supporting block structure supports the auxiliary block, the positioning rod structure and the sleeve part to be positioned, installed and fixed, then the control pipeline is connected with the top end of the top part structure, then fastening connection is conducted through a bolt, the sleeve part is located at the connecting position to be closed, meanwhile, the blocking part structure assists stress contact sealing, the sealing effect is improved, and when smoke or gas is exhausted, the smoke or gas is exhausted. According to the laboratory waste treatment device for the microorganism research, smoke cannot overflow through the connecting position, and the problem that in the incineration process of a common laboratory waste treatment device for the microorganism research, smoke easily overflows through the pipeline connecting position, and the sealing effect is affected is solved.

The utility model relates to the technical field of firewood stoves, in particular to a thermal circulation firewood stove which comprises a stove body, a metal top plate is fixedly installed on the top of the stove body, an air plate is fixedly installed on the side face of the metal top plate, a chimney is fixedly installed on the top of the metal top plate, and hinges are fixedly installed on the surface of the stove body. A furnace door is fixedly installed on the face, away from the furnace body, of a hinge, high-strength glass is fixedly installed in a connecting block, a fire opening is formed in the face, close to the furnace door, of the furnace body, an air inlet device is fixedly installed on the rear face of the furnace body, and an airflow pipe is fixedly installed in the furnace body. The air inlet device is matched with the airflow pipe to quickly convert outside cold air into hot air to be exhausted, so that the heating rate of the whole furnace body can be greatly increased, the required heating time can be shortened, and heat required to be supplemented by a human body can be more efficiently provided.

The utility model discloses a self-locking boiler door which comprises a boiler body, the outer portion of the boiler body is rotationally connected with a door body, a first sliding groove is formed in the door body, and a square groove is formed in the boiler body; and the self-locking assembly comprises a sliding block, the sliding block is connected to the interior of the first sliding groove in a sliding mode, and the first sliding groove and the square groove are arranged in a radian mode, so that when the door body is closed, the square groove coincides with the first sliding groove along the radian line. According to the device, firstly, the device is placed at a proper position, when a door body is closed, a sliding block is clamped in a square groove, meanwhile, a locking block is clamped in a round hole and extrudes two trapezoidal clamping blocks, the trapezoidal clamping blocks contract along the interior of a second sliding groove after being extruded, and when the trapezoidal clamping blocks slide to the right sides of the trapezoidal clamping blocks, the door body is closed. And through the elastic force of the reset spring, the two trapezoidal clamping blocks lock the locking block, and the self-locking effect on the door body is synchronously achieved.