A pit nitriding furnace

Abstract

The present application relates to a well-type nitriding furnace, which includes a furnace body and a furnace cover. A lifting tooling is provided on the furnace cover. The lifting tooling includes a truss. A walking component is provided on the truss. The walking component moves along the truss. A plurality of lifting rods moving vertically are arranged on the walking component. The bottom end of the lifting rod is fixedly connected to the furnace cover. An anti-falling component is further provided on the lifting tooling. The anti-falling component includes a fixed rod. A first wheel and a second wheel are provided on the fixed rod. An anti-falling groove and a driving rack are arranged in parallel on the lifting rod. A plurality of grooves are provided in the circumferential direction of the first wheel. Locking pieces are arranged in the grooves. An anti-falling groove and a driving rack are provided on the lifting rod. The first wheel and the second wheel form an integral structure and are respectively matched with the anti-falling groove and the driving rack. When the lifting rod falls, the driving rack on the lifting rod falls at a high speed, driving the second wheel to rotate at a high speed. The first wheel linked to the second wheel generates inertia to throw out the locking piece and embed it into the anti-falling groove, and the locking piece abuts against the ejector pin to lock the lifting rod, realizing the anti-falling function. The use effect is good.

Description

Technical Field

[0001] This application relates to the technical field of nitriding furnaces, and particularly to a pit-type nitriding furnace. Background Art

[0002] A nitriding furnace is a commonly used device for processing metal workpieces and improving the surface quality of workpieces. Nitriding furnaces can be divided into gas nitriding furnaces and ion nitriding furnaces according to different processing methods. When a traditional gas nitriding furnace works, the workpiece is placed in a sealed container, and flowing ammonia gas is passed through and heated. After maintaining the temperature for a long time, the ammonia gas thermally decomposes to produce active nitrogen atoms, which continuously adsorb to the surface of the workpiece and diffuse into the surface layer of the workpiece, thereby changing the chemical composition and structure of the surface layer and obtaining excellent surface properties.

[0003] The furnace cover of a nitriding furnace is generally transported by means of lifting. The method of lifting with a rope is prone to instability. The furnace cover suspended in the air after being lifted by the rope is prone to shaking and poses risks. Therefore, existing lifting devices generally set up lifting rods, and the lifting rods are engaged with the power components through a rack and pinion drive to lift the furnace cover. However, after long-term use, meshing wear is bound to occur, which may cause the furnace cover to fall in mid-air and pose a threat to ground construction workers. Therefore, this application provides a structure of a pit-type nitriding furnace that can prevent falling when the furnace cover is lifted. Summary of the Invention

[0004] The technical problem to be solved by this application is to provide a pit-type nitriding furnace with an anti-falling structure added to the lifting rod, which solves the problem that the lifting rod is prone to wear and fall after long-term use in the prior art.

[0005] To solve the above problems, the following technical solutions are provided:

[0006] The pit-type nitriding furnace of this application includes a furnace body and a furnace cover. The furnace cover is provided with a lifting tooling. The lifting tooling includes a truss. A walking component is provided on the truss, and the walking component moves along the truss. A plurality of vertically moving lifting rods are arranged on the walking component. The bottom end of the lifting rod is fixedly connected to the furnace cover. An anti-falling component is also provided on the lifting tooling. The anti-falling component includes a fixed rod. A first wheel and a second wheel are provided on the fixed rod. An anti-falling groove and an active rack are arranged in parallel on the lifting rod. A plurality of grooves are provided in the circumferential direction of the first wheel, and locking pieces are arranged in the grooves. One of the locking pieces extends out of the groove and is stuck into the anti-falling groove. A top pin is further provided at the bottom end of the fixed rod. When the locking piece is stuck into the anti-falling groove, the bottom end of the aforementioned locking piece abuts against the top pin; teeth meshing with the active rack are provided on the second wheel; the first wheel and the second wheel are arranged in a linked manner.

[0007] By adopting the above technical solution: The hoisting rod is provided with an anti-falling groove and an active rack. Wheel 1 and Wheel 2 form an integral structure and are respectively engaged with the anti-falling groove and the active rack. When the hoisting rod falls, the active rack on the hoisting rod falls at high speed, driving Wheel 2 to rotate at high speed. Wheel 1 linked to Wheel 2 generates inertia to throw out the locking piece and embed it into the anti-falling groove, and the locking piece abuts against the ejector pin to lock the hoisting rod, realizing the anti-falling function. The use effect is good.

[0008] The locking piece is provided with a strip-shaped groove. A stop block is arranged near the groove opening in the strip-shaped groove. The stop block is fixedly connected to the inner wall of the groove, and a first spring is also arranged in the groove. One end of the first spring is fixedly connected to the inner wall of the groove far from the groove opening, and the other end is fixedly connected to the stop block. The end of the locking piece extending out of the groove is trapezoidal with an inverted shape, and the two corners of the trapezoid are hook-shaped.

[0009] By adopting the above technical solution: Generally, the locking piece is pressed in the groove due to the first spring. When Wheel 1 generates centrifugal force, the locking piece will overcome the spring force and be thrown outwards. Setting the two corners of the locking piece into hook shapes makes it easier to form a stable connection effect after being caught in the anti-falling groove when the hoisting rod drops, so that the connection will not be disengaged after one end of the locking piece extends into the anti-falling groove, providing a stable connection effect.

[0010] The anti-falling groove is a flat and long parallelogram adapted to be connected with the locking piece.

[0011] By adopting the above technical solution: In order to cooperate with the use of the locking piece with one end being hook-shaped, the anti-falling groove is designed as a parallelogram, and the hook-shaped end is easier to be embedded into the anti-falling groove, improving the cooperation effect.

[0012] The fixed rod is provided with a connecting arm. Wheel 1 and Wheel 2 form an integral body through a connecting shaft, and one end of the connecting arm is rotatably connected to the connecting shaft.

[0013] By adopting the above technical solution: The connecting shaft is connected to the connecting arm, and Wheel 1 and Wheel 2 are combined into one body so that Wheel 1 and Wheel 2 rotate synchronously.

[0014] The traveling assembly includes a traveling bracket. Support feet are vertically connected to the four sides of the traveling bracket. The bottom ends of the support feet are connected with rollers that are in rolling connection with the truss. At least one motor 1 power-connected to the rollers is arranged on the traveling bracket. Three cross arms are fixedly connected to the traveling bracket. The two sides are driving arms, and the middle is a support arm. Lifting rods are arranged at both ends of the driving arms. A first transmission rod is vertically connected to the support arm. A second transmission rod is arranged on the driving arm. The two ends of the second transmission rod are in cross-axis gear transmission connection with the lifting rod. The two ends of the first transmission rod are in cross-axis gear transmission connection with the second transmission rod. A motor 2 is arranged on the support arm. The output end of the motor 2 is in cross-axis gear transmission connection with the middle part of the first transmission rod.

[0015] By adopting the above technical solution: After the furnace cover is lifted, it can move on the truss through the traveling component, and by setting the first transmission rod and the second transmission rod, all the lifting rods can be controlled to lift synchronously, and the stability of the furnace cover lifting is greatly improved.

[0016] A wind guide cover is provided below the furnace cover. A plurality of branch air pipes are inserted into the furnace cover itself. The branch air pipes include inner pipes and outer pipes nested on the inner pipes. The lower ends of the inner pipes and the outer pipes both pass through the furnace cover. The lower end of the outer pipe extends above the wind guide cover, and the lower end of the inner pipe extends below the wind guide cover. A height adjustment component is also provided between the furnace cover and the wind guide cover. The height adjustment component includes a plurality of adjustment screws and locking nuts. The bottom end of the adjustment screw is fixedly connected to the wind guide cover. The top end of the adjustment screw is provided with a thread, and the threaded part extends out from the top of the furnace cover. The locking nut is located above the furnace cover and is connected to the threaded part of the adjustment screw. There is a water-cooled cavity between the furnace body and the furnace cover. A plurality of cleaning ports are evenly distributed on the side of the water-cooled cavity, and leak-proof components are connected to the cleaning ports.

[0017] By adopting the above technical solution: Since the bottom end of the inner pipe extends below the wind guide cover, the bottom end of the outer pipe extends above the wind guide cover, and the inside of the furnace is separated by the wind guide cover, air enters above the wind guide cover from the outer pipe, and the atmosphere gas in the furnace enters the furnace body from the inner pipe. The required atmosphere and air in the furnace enter the furnace through the inner pipe and the outer pipe respectively, thus effectively avoiding gas leakage.

[0018] A plurality of air holes are provided on the wind guide cover, and a fan is provided above the air holes. A motor three is installed on the furnace cover, and the output shaft of the motor passes through the furnace cover and is connected to the rotating shaft of the fan.

[0019] By adopting the above technical solution: Air holes are provided for air circulation in the furnace body, and in cooperation with the height adjustment component, by turning the locking nut to change the height of the wind guide cover, the air gap between the air holes and the fan changes, thereby changing the air intake.

[0020] The leak-proof component includes a leak-proof bolt and a bolt hole communicated with the cleaning port. The leak-proof bolt is connected to the bolt hole, and the leak-proof bolt uses a waterproof thread.

[0021] By adopting the above technical solution: Using a leak-proof bolt with a waterproof thread ensures that the cleaning port is normally closed and does not leak. By loosening the leak-proof bolt, the scraping tool can be inserted, which is convenient and fast to use.

[0022] The leak-proof component includes a connecting neck connected to the cleaning port and a leak-proof cover detachably connected to the neck opening of the connecting neck. At least one set of first connecting blocks is symmetrically arranged on the circumferential side wall of the leak-proof cover. A second connecting block corresponding to the first connecting block is arranged on the side of the neck opening of the connecting neck. A positioning rod is arranged on the first connecting block, and a positioning hole connected to the positioning rod is arranged on the second connecting block. A dial ring for buckling the first connecting block is further arranged on the second connecting block. When the dial ring buckles the first connecting block, the dial ring pushes the positioning rod into the positioning hole.

[0023] By adopting the above technical solution: The connecting neck and the leak-proof cover are connected, and the leak-proof cover can be quickly installed and disassembled, expanding the use diameter of the cleaning port, making the use of the scraping tool more convenient, and at the same time, the leak-proof cover ensures no leakage.

[0024] An exhaust gas discharge component is further arranged on the furnace cover. The exhaust gas discharge component includes a discharge pipe, and a pressure maintaining valve, a burner and a neutralizer are sequentially arranged on the discharge pipe; the burner is sequentially provided with a horn cover, a linear combustion tank and an air inlet component from the air inlet end to the air outlet end; a first air gap is left between the edge of the horn mouth of the horn cover and the inner wall of the burner; a heating wire is arranged in the linear combustion tank, one end of the linear combustion tank is inserted into the horn cover, and a second air gap is uniformly left between the outer wall of the linear combustion tank and the inner wall of the horn cover; the air inlet component is arranged corresponding to the second air gap for uniformly pushing the exhaust gas into the horn mouth.

[0025] By adopting the above technical solution: The exhaust gas in the furnace is discharged through the discharge pipe, and sequentially passes through the pressure maintaining valve, the burner and the neutralizer. The pressure maintaining valve can ensure that the exhaust gas in the furnace has a certain pressure, increasing the density of the exhaust gas. The first air gap and the second air gap are arranged in the burner. The air flow passes through the first air gap and is then blown into the second air gap by the air inlet structure, which can well ensure the combination of air and exhaust gas, ensuring full combustion. The heating wire is arranged in the linear combustion tank, and the exhaust gas is ignited by continuous heating, increasing the combustion path. The combusted gas is discharged through the neutralizer to meet the emission standard.

[0026] In summary, the present application includes the following beneficial effects:

[0027] Since the well-type nitriding furnace of the present application includes a furnace body and a furnace cover, a lifting tooling is provided on the furnace cover. The lifting tooling includes a truss, a traveling component is provided on the truss, the traveling component moves along the truss, a plurality of lifting rods moving vertically are arranged on the traveling component, the bottom end of the lifting rod is fixedly connected to the furnace cover, and an anti-falling component is further provided on the lifting tooling. The anti-falling component includes a fixed rod, a first wheel and a second wheel are provided on the fixed rod. An anti-falling groove and a driving rack are arranged in parallel on the lifting rod. A plurality of grooves are provided in the circumferential direction of the first wheel, and locking pieces are arranged in the grooves. One of the locking pieces extends out of the groove and is stuck into the anti-falling groove. A thimble is further provided at the bottom end of the fixed rod. When the locking piece is stuck into the anti-falling groove, the bottom end of the aforementioned locking piece abuts against the thimble; teeth meshing with the driving rack are provided on the second wheel; the first wheel and the second wheel are arranged in a linked manner; an anti-falling groove and a driving rack are arranged on the lifting rod, and the first wheel and the second wheel form an integral structure and are respectively matched with the anti-falling groove and the driving rack. When the lifting rod falls, the driving rack on the lifting rod falls at high speed, drives the second wheel to rotate at high speed, and the first wheel linked with the second wheel generates inertia to throw out the locking piece and embed it into the anti-falling groove, and the locking piece abuts against the thimble to lock the lifting rod, realizing the anti-falling function. The use effect is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the front view schematic diagram of the lifting tooling in Embodiment 1 of the present application;

[0029] Figure 2 is Figure 1 the enlarged structural schematic diagram at A in

[0030] Figure 3 is the top view schematic diagram of the lifting tooling in Embodiment 1 of the present application;

[0031] Figure 4 is the structural schematic diagram of the anti-falling component in Embodiment 1 of the present application;

[0032] Figure 5 is Figure 4 the enlarged structural schematic diagram at B in

[0033] Figure 6 is the structural schematic diagram of the lifting rod in Embodiment 1 of the present application;

[0034] Figure 7 is the structural schematic diagram of Embodiment 2 of the present application;

[0035] Figure 8 is the structural schematic diagram of a leak-proof component in Embodiment 3 of the present application;

[0036] Figure 9 is the structural schematic diagram of another leak-proof component in Embodiment 3 of the present application;

[0037] Figure 10 isFigure 9 Schematic cross-sectional structure diagram;

[0038] Figure 11 Schematic structure diagram of Embodiment 4 of the present application;

[0039] Figure 12 Schematic internal structure diagram of the linear combustion tank in Embodiment 4 of the present application;

[0040] Figure 13 Schematic structure diagram of the air inlet box in Embodiment 4 of the present application.

[0041] Explanation of reference numerals: 100, furnace cover; 101, air guide cover; 1011, air hole; 102, gas distribution pipe; 1021, inner pipe; 1022, outer pipe; 1023, intake pipe; 103, air gap; 104, fan; 105, adjusting screw; 106, locking nut; 200, traveling assembly; 201, traveling bracket; 2011, support leg; 2012, roller; 2013, motor 1; 202, lifting rod; 2021, anti-falling groove; 2022, driving rack; 2023, guiding rib; 203, fixed rod; 204, connecting arm; 205, wheel 1; 2051, groove; 2052, locking piece; 2053, first spring; 2054, stop block; 2055, strip-shaped groove; 206, wheel 2; 207, connecting shaft; 208, ejector pin; 209, transmission arm; 210, support arm; 211, first transmission rod; 212, second transmission rod; 213, motor 2; 300, water cooling chamber; 301, cleaning port; 302, anti-leakage bolt; 303, connecting neck; 304, anti-leakage cover; 305, first connecting block; 3051, positioning hole; 306, second connecting block; 307, dial ring; 308, positioning rod; 309, second spring; 310, push block; 400, furnace body; 500, discharge pipe; 600, pressure maintaining valve; 700, burner; 701, lead post; 7011, interface; 702, bell mouth; 703, linear combustion tank; 704, air inlet box; 7041, air nozzle; 7042, gas filling pipe; 705, air guide plate; 706, filter plate; 707, limit block; 708, heating wire; 71, air inlet; 72, exhaust port; 73, first air gap; 74, second air gap; 800, neutralizer. Detailed implementation manners

[0042] The following further elaborates on the embodiments of the present application in conjunction with the attached Figure 1-13 for a more detailed description.

[0043] Embodiment 1:

[0044] As Figure 1-6As shown in the figure, a well-type nitriding furnace disclosed in Embodiment 1 of the present invention includes a furnace body 400 and a furnace cover 100. A lifting tooling is provided on the furnace cover 100, and the lifting tooling is used to lift and lower the furnace cover 100. Generally, it includes a truss and a walking component 200. The walking component 200 is provided on the truss, and the walking component 200 moves along the truss. A plurality of lifting rods 202 moving vertically are arranged on the walking component 200. The bottom end of the lifting rod 202 is fixedly connected to the furnace cover 100. An anti-falling component is further provided on the lifting tooling. The anti-falling component includes a fixed rod 203. A wheel one 205 and a wheel two 206 are provided on the fixed rod 203. An anti-falling groove 2021 and a driving rack 2022 are arranged in parallel on the lifting rod 202. Four grooves 2051 are provided in the circumferential direction of the wheel one 205, and locking pieces 2052 are arranged in the grooves 2051. One of the locking pieces 2052 projects from the groove 2051 and is caught in the anti-falling groove 2021. A thimble 208 is further provided at the bottom end of the fixed rod 203. When the locking piece 2052 is caught in the anti-falling groove 2021, the bottom end of the aforementioned locking piece 2052 abuts against the thimble 208; teeth meshing with the driving rack 2022 are provided on the wheel two 206; the wheel one 205 and the wheel two 206 are arranged in a linked manner.

[0045] A strip-shaped groove 2055 is provided on the locking piece 2052. A stop block 2054 is provided near the groove opening in the strip-shaped groove 2055. The stop block 2054 is fixedly connected to the inner wall of the groove 2051, and a first spring 2053 is further provided in the groove 2051. One end of the first spring 2053 is fixedly connected to the inner wall of the groove 2051 away from the groove opening, and the other end is fixedly connected to the stop block 2054. The end of the locking piece 2052 protruding from the groove 2051 is trapezoidal with an inverted shape, and the two corners of the trapezoid are hook-shaped. The anti-falling groove 2021 is a flat and elongated parallelogram adapted to be connected to the locking piece 2052; when the locking piece 2052 is thrown out due to inertia, the hook-shaped locking piece 2052 can easily be caught in the parallelogram-shaped anti-falling groove 2021, effectively reducing the combination difficulty between the two and improving the use effect of the two.

[0046] In this embodiment, a connecting arm 204 is provided on the fixed rod 203. Both ends of the connecting shaft 207 are arranged at the centers of the wheel one 205 and the wheel two 206 respectively. The wheel one 205 and the wheel two 206 are integrated through the connecting shaft 207 so that the two are in a linked state. The connecting arm 204 is used to support the wheel one 205 and the wheel two 206. Therefore, the connecting shaft 207 can be rotatably connected to the connecting arm 204.

[0047] Further, the walking component 200 is used to move the furnace cover 100. It includes a walking bracket 201. Support feet 2011 are vertically connected to the four sides of the walking bracket 201. The bottom ends of the support feet 2011 are connected with rollers 2012 that are in rolling connection with the truss. The walking bracket 201 is connected to the truss through the rollers 2012 and can walk on the truss. As Figure 1As shown in the figure, two sets of motors 2013 are arranged on the walking bracket 201 of this embodiment and are power-connected to the rollers 2012. One motor 2013 is arranged on each of the front and rear sides along the walking direction of the truss. In order to realize the lifting of the furnace cover 100, three cross arms are fixedly connected to the walking bracket 201. The cross arms on both sides are transmission arms 209, and the middle cross arm is a support arm 210. As Figure 3 shown, the lifting rods 202 are vertically arranged at both ends of the transmission arms 209. A first transmission rod 211 is vertically connected to the support arm 210. A second transmission rod 212 is arranged on the transmission arm 209. Both ends of the second transmission rod 212 are connected to the lifting rod 202 through cross-axis gear transmission. Both ends of the first transmission rod 211 are connected to the second transmission rod 212 through cross-axis gear transmission. A motor 213 is arranged on the support arm 210. The output end of the motor 213 is connected to the middle part of the first transmission rod 211 through cross-axis gear transmission. As in the gear rack module disclosed in patent number 201921344656.X, a gear rack method is adopted between the lifting rod 202 and the second transmission rod 212. The active rack 2022 is installed on the lifting rod 202, and the gears are installed at both ends of the second transmission rod 212. When the second transmission rod 212 rotates, the lifting rod 202 can be lifted or lowered as required; as in the bevel gear transmission mechanism disclosed in patent number 201580018926.6, since the first transmission rod 211 and the second transmission rod 212, and the output end of the motor 213 and the first transmission rod 211 in this article are all perpendicular transmissions, both adopt the transmission method of bevel gear transmission.

[0048] As Figure 4-6 shown, since the lifting rod 202 needs to be provided with an anti-falling component, in this embodiment, one side of the lifting rod 202 is set as a passive rack, and the other side is set as an active rack 2022 and an anti-falling groove 2021 component. In addition, guide ribs 2023 are arranged on both sides of the lifting rod 202 avoiding the aforementioned components. Guide grooves corresponding to the guide ribs 2023 are arranged on the transmission arm 209. Through the arrangement of the guide ribs 2023, the lifting function and the anti-falling function of the lifting rod 202 can be ensured to take effect simultaneously. In order to reduce the frictional resistance of the guide ribs 2023, the guide ribs 2023 and the guide grooves are in smooth surface fit, and their friction coefficient can reach 0.1.

[0049] The working process of the anti-falling component is as follows: when the furnace cover 100 falls, the lifting rod 202 drops at high speed. The driving rack 2022 on one side of the lifting rod 202 drives the second wheel 206 to rotate at high speed, so that the first wheel 205 linked thereto rotates at high speed to generate centrifugal force. The locking piece 2052 is thrown outwards by the centrifugal force. At this time, one of the protruding locking pieces 2052 extends into any one of the anti-falling grooves 2021 that are falling directly below, thus forming the effect that the locking piece 2052 hooks the lifting rod 202. When the lifting rod 202 continues to fall, the lower end of the locking piece 2052 abuts against the ejector pin 208, so that a stable support structure can be formed between the lifting rod 202 and the locking piece 2052, effectively preventing the lifting rod 202 from falling.

[0050] Embodiment 2:

[0051] As Figure 1 、 Figure 2 and Figure 7 shown, the difference between this embodiment and Embodiment 1 is that a wind guide cover 101 is provided below the furnace cover 100, and a plurality of branch air pipes 102 are inserted into the furnace cover 100 itself. The branch air pipe 102 includes an inner pipe 1021 and an outer pipe 1022 nested on the inner pipe 1021. The lower ends of both the inner pipe 1021 and the outer pipe 1022 pass through the furnace cover 100. The lower end of the outer pipe 1022 extends above the wind guide cover 101, and the lower end of the inner pipe 1021 extends below the wind guide cover 101; a height adjustment component is further provided between the furnace cover 100 and the wind guide cover 101. The height adjustment component includes a plurality of adjustment screws 105 and locking nuts 106. The bottom end of the adjustment screw 105 is fixedly connected to the wind guide cover 101. The top end of the adjustment screw 105 is provided with a thread and the threaded part extends out from the top of the furnace cover 100. The locking nut 106 is located above the furnace cover 100 and is connected to the threaded part of the adjustment screw 105. By providing the wind guide cover 101 to separate air from the atmosphere gas, a large amount of cold air is prevented from directly entering the furnace. At the same time, by providing the nested inner pipe 1021 and outer pipe 1022, the atmosphere gas enters through the top end of the inner pipe 1021 and air enters through the top end of the outer pipe 1022, so that the atmosphere gas and air respectively enter the furnace through the inner pipe 1021 and the intake pipe 1023. Since the inner pipe 1021 and the outer pipe 1022 are separated by the wind guide cover 101, air enters above the wind guide cover 101 from the outer pipe 1022, and the atmosphere gas enters below the wind guide cover 101 from the inner pipe 1021, and then enters the inside of the furnace body 400, thus effectively preventing air and atmosphere gas from mixing. As can be seen from the above, in this embodiment, by nesting the inner pipe 1021 in the outer pipe 1022, the number of pipes on the furnace cover 100 is greatly reduced, which is beneficial to the reasonable arrangement of air pipes, water pipes and electric wires and facilitates later maintenance.

[0052] In addition, a plurality of air holes 1011 are provided on the air guide cover 101, and a fan 104 is provided above the air holes 1011. A third motor is installed on the furnace cover 100, and the output shaft of the motor passes through the furnace cover 100 and is connected to the rotating shaft of the fan 104. Further, by using the cooperation of the screw and the nut of the height adjustment assembly, the bottom end of the screw is fixedly connected to the air guide cover 101, so that the furnace cover 100 and the air guide cover 101 can be connected. When the height of the air guide cover 101 is not appropriate, the height of the air guide cover 101 can be changed by turning the locking nut 106, so that the air gap 103 between the air holes 1011 and the fan 104 changes, thereby changing the air intake volume.

[0053] Embodiment 3:

[0054] The difference between this embodiment and Embodiment 1 is that there is a water cooling cavity 300 between the furnace body 400 and the furnace cover 100. Four cleaning ports 301 are evenly distributed on the side surface of the water cooling cavity 300, and leak-proof components are connected to each cleaning port 301.

[0055] As Figure 8 shown, one type of leak-proof component includes a leak-proof bolt 302 and a bolt hole communicating with the cleaning port 301, and the leak-proof bolt 302 is connected to the bolt hole. The slag layer on the inner wall of the water cooling cavity 300 is scraped off by a scraping tool extending from each cleaning port, and then combined with the flushing method to thoroughly clean the slag layer inside the water cooling cavity 300. Since the cleaning port needs to be normally closed during normal operation and to ensure no leakage, a leak-proof bolt 302 with a waterproof thread is provided. By loosening the leak-proof bolt 302, the scraping tool can be extended, which is convenient and fast to use.

[0056] As Figure 9 and Figure 10 shown, another type of leak-proof component includes a connecting neck 303 connected to the cleaning port 301 and a leak-proof cover 304 detachably connected to the neck opening of the connecting neck 303. A set of first connecting blocks 305 are symmetrically arranged on the circumferential side wall of the leak-proof cover 304, and second connecting blocks 306 corresponding to the first connecting blocks 305 are arranged on the side surface of the neck opening of the connecting neck 303. A positioning rod 308 is arranged on the first connecting block 305, and a positioning hole 3051 connected to the positioning rod 308 is arranged on the second connecting block 306. A dial ring 307 for buckling the first connecting block 305 is also arranged on the second connecting block 306. When the dial ring 307 buckles the first connecting block 305, the dial ring 307 pushes the positioning rod 308 into the positioning hole 3051. The leak-proof cover 304 of this leak-proof component can be quickly disassembled, ensuring no leakage while expanding the cleaning port 301 to obtain a better cleaning effect.

[0057] Further, a second spring 309 is provided on the positioning rod 308 between the first connecting block 305 and the pushing block 310. Two ends of the second spring 309 are fixedly connected to the first connecting block 305 and the pushing block 310 respectively. By installing the second spring 309 on the positioning rod 308, on the one hand, it is convenient for the positioning rod 308 to disengage from the positioning hole 3051 and return to the initial state. On the other hand, the pushing block 310 abuts against the dial ring 307, which can always press the pushing block 310 tightly against the dial ring 307 to prevent the dial ring 307 from falling off.

[0058] Embodiment 4:

[0059] As Figure 11 and Figure 12 shown, the difference between this embodiment and the embodiment is that an exhaust pipe 500 is installed on the furnace cover 100. A pressure maintaining valve 600, a burner 700 and a neutralizer 800 are sequentially arranged on the exhaust pipe 500. One end of the burner 700 is an air inlet 71, and the other end is an exhaust port 72. Inside the burner 700, a horn cover 702, a linear combustion tank 703 and an air inlet assembly are sequentially arranged from the air inlet 71 to the exhaust port 72. A first air gap 73 is left between the edge of the horn mouth of the horn cover 702 and the inner wall of the burner 700. A heating wire is arranged inside the linear combustion tank 703. One end of the linear combustion tank 703 is inserted into the horn cover 702, and a second air gap 74 is evenly left between the outer wall of the linear combustion tank 703 and the inner wall of the horn cover 702. The air inlet assembly is arranged corresponding to the second air gap 74 for evenly pushing the waste gas into the horn mouth. In addition, a lead post 701 is connected to the small head of the horn cover 702. The lead post 701 is of an L-shaped structure. An interface 7011 is provided at one end of the lead post 701 close to the horn cover 702, and the other end extends outside the burner 700 for connecting the controller of the heating wire 708. A threaded groove is provided on the inner wall of the interface 7011, and a thread line is arranged on the outside of the small head of the horn cover 702. The two are connected by threads. The horn cover 702 and the interface 7011 can be disassembled, which is convenient for replacing the horn cover 702 with different horn mouth sizes, so as to adjust the size of the first air gap 73 to control the intake quantity of the waste gas. At the same time, the energizing structure of the heating wire is realized, and the heating wire is led out from the interface 7011.

[0060] Further, the cross-section of the interface 7011 is ω-shaped. A filter plate 706 is fixed on the outside of the horn cover 702. A limiting block 707 is arranged on the inner wall of the burner 700. When one end of the horn cover 702 is threadedly connected to the interface 7011 of the lead post 701, the horn cover 702 can press the filter plate 706 tightly against the limiting block 707. The limiting block 707 is used to compensate for the gap between the filter plate 706 and the inner wall of the burner 700. The waste gas led out from the second air gap 74 enters the interface 7011. The ω-shaped interface 7011 has a guiding effect. The ω-shaped structure arranged through the interface 7011 can better guide the waste gas into the linear combustion tank 703 for combustion.

[0061] During operation, the exhaust gas in the furnace is discharged through the exhaust pipe 500, and successively passes through the pressure-holding valve 600, the burner 700, and the neutralizer 800. The pressure-holding valve 600 can ensure that the exhaust gas in the furnace has a certain pressure, increasing the density of the exhaust gas. The burner 700 is provided with a first air gap 73 and a second air gap 74. The air flow passes through the first air gap 73 and is then blown into the second air gap 74 by the air inlet assembly, which can well ensure the combination of air and exhaust gas and ensure full combustion. A heating wire is provided in the linear combustion tank 703, and the exhaust gas is ignited through continuous heating to increase the combustion path. The combusted gas is discharged through the neutralizer 800.

[0062] As Figure 13 shown, the air inlet assembly includes an annular air inlet box 704. A plurality of air nozzles 7041 are uniformly arranged on the inner wall of the air inlet box 704 as required. An air inlet pipe 7042 connected to the inner cavity of the air inlet box 704 is provided outside the burner 700; a wind guide plate 705 is provided on the linear combustion tank 703. The wind guide plate 705 is in a horn shape, and the orientation of the horn mouth of the wind guide plate 705 is the same as that of the horn cover 702. Since the air nozzles 7041 of the air inlet box 704 blow air towards the wind guide plate 705, the blown air pushes the exhaust gas passing through the first air gap 73 along the wind guide plate 705 into the second air gap 74, enabling the full combination of air and exhaust gas and ensuring that there is sufficient air during the combustion of the exhaust gas, thereby improving the combustion effect.

[0063] The present invention has been described in conjunction with specific embodiments, but those skilled in the art should understand that these descriptions are exemplary and do not limit the protection scope of the present invention. Those skilled in the art can make various variations and modifications to the present invention according to the spirit and principle of the present invention, and these variations and modifications are also within the scope of the present invention.

Claims

1. A well - type nitriding furnace, comprising a furnace body (400) and a furnace cover (100). A lifting tooling is provided on the furnace cover (100). The lifting tooling includes a truss, and a traveling component (200) is provided on the truss. The traveling component (200) moves along the truss. A plurality of lifting rods (202) moving vertically are arranged on the traveling component (200), and the bottom end of the lifting rod (202) is fixedly connected to the furnace cover (100). It is characterized in that: The lifting tooling is also provided with a falling prevention component. The falling prevention component includes a fixed rod (203). A first wheel (205) and a second wheel (206) are arranged on the fixed rod (203). An anti-falling groove (2021) and a rack are arranged in parallel on the lifting rod (202). A plurality of grooves (2051) are arranged in the circumferential direction of the first wheel (205). Locking pieces (2052) are arranged in the grooves (2051). After one of the locking pieces (2052) extends out of the groove (2051), it is clamped into the anti-falling groove (2021). A thimble (208) is further arranged at the bottom end of the fixed rod (203). When the locking piece (2052) is clamped into the anti-falling groove (2021), the bottom end of the foregoing locking piece (2052) abuts against the thimble (208). Teeth meshing with the rack are arranged on the second wheel (206). The first wheel (205) and the second wheel (206) are arranged in a linked manner. A connecting arm (204) is arranged on the fixed rod (203). The first wheel (205) and the second wheel (206) are integrated through a connecting shaft (207). One end of the connecting arm (204) is rotatably connected to the connecting shaft (207).

2. The well - type nitriding furnace according to claim 1, characterized in that, A strip-shaped groove (2055) is arranged on the locking piece (2052). A stop block (2054) is arranged near the notch in the strip-shaped groove (2055). The stop block (2054) is fixedly connected to the inner wall of the groove (2051). A first spring (2053) is further arranged in the groove (2051). One end of the first spring (2053) is fixedly connected to the inner wall of the groove (2051) far from the notch, and the other end is fixedly connected to the stop block (2054). The end of the locking piece (2052) extending out of the groove (2051) is trapezoidal with an inverted shape, and the two corners of the trapezoid are hook-shaped.

3. The well - type nitriding furnace according to claim 2, characterized in that, The anti-falling groove (2021) is a flat and long parallelogram adapted to be connected with the locking piece (2052).

4. The well - type nitriding furnace according to claim 1, 2 or 3, characterized in that, The walking component (200) includes a walking bracket (201). Support feet (2011) are vertically connected to the four sides of the walking bracket (201). The bottom ends of the support feet (2011) are connected with rollers (2012) rollingly connected to the truss. At least one motor one (2013) power-connected to the rollers (2012) is arranged on the walking bracket (201). Three cross arms are fixedly connected to the walking bracket (201). The two sides are transmission arms (209), and the middle is a support arm (210). Lifting rods (202) are arranged at both ends of the transmission arm (209). A first transmission rod (211) is vertically connected to the support arm (210). A second transmission rod (212) is arranged on the transmission arm (209). The two ends of the second transmission rod (212) are connected to the lifting rod (202) through cross-axis gear transmission. The two ends of the first transmission rod (211) are connected to the second transmission rod (212) through cross-axis gear transmission. A motor two (213) is arranged on the support arm (210). The output end of the motor two (213) is connected to the middle part of the first transmission rod (211) through cross-axis gear transmission.

5. The well - type nitriding furnace according to claim 1, characterized in that, A wind guide cover (101) is provided below the furnace cover (100). A plurality of branch air pipes (102) are inserted into the furnace cover (100) itself. The branch air pipes (102) include inner pipes (1021) and outer pipes (1022) nested on the inner pipes (1021). The lower ends of both the inner pipes (1021) and the outer pipes (1022) pass through the furnace cover (100). The lower end of the outer pipe (1022) extends above the wind guide cover (101), and the lower end of the inner pipe (1021) extends below the wind guide cover (101). A height adjustment assembly is further provided between the furnace cover (100) and the wind guide cover (101). The height adjustment assembly includes a plurality of adjustment screws (105) and lock nuts (106). The bottom end of the adjustment screw (105) is fixedly connected to the wind guide cover (101). The top end of the adjustment screw (105) is provided with threads and the threaded part extends out from the top of the furnace cover (100). The lock nut (106) is located above the furnace cover (100) and is connected to the threaded part of the adjustment screw (105). A water cooling cavity (300) is provided between the furnace body (400) and the furnace cover (100). A plurality of cleaning ports (301) are evenly distributed on the side surface of the water cooling cavity (300), and leak prevention assemblies are connected to the cleaning ports (301).

6. The well - type nitriding furnace according to claim 5, characterized in that, A plurality of air holes (1011) are provided on the wind guide cover (101). A fan (104) is provided above the air holes (1011). A motor three is installed on the furnace cover (100), and the output shaft of the motor passes through the furnace cover (100) and is connected to the rotating shaft of the fan (104).

7. The well - type nitriding furnace according to claim 5 or 6, characterized in that, The leak prevention assembly includes a leak prevention bolt (302) and a bolt hole communicating with the cleaning port (301). The leak prevention bolt (302) is connected to the bolt hole, and the leak prevention bolt (302) uses a waterproof thread.

8. The well - type nitriding furnace according to claim 5 or 6, characterized in that, The leak prevention assembly includes a connecting neck (303) connected to the cleaning port (301) and a leak prevention cover (304) detachably connected to the neck opening of the connecting neck (303). At least a set of first connecting blocks (305) are symmetrically arranged on the circumferential side wall of the leak prevention cover (304). A second connecting block (306) corresponding to the first connecting block (305) is arranged on the side surface of the neck opening of the connecting neck (303). A positioning rod (308) is arranged on the first connecting block (305), and a positioning hole (3051) connected to the positioning rod (308) is arranged on the second connecting block (306). A dial ring (307) for buckling the first connecting block (305) is further arranged on the second connecting block (306). When the dial ring (307) buckles the first connecting block (305), the dial ring (307) pushes the positioning rod (308) into the positioning hole (3051).

9. The well - type nitriding furnace according to claim 1 or 2, characterized in that, The furnace cover (100) is further provided with an exhaust gas emission assembly, and the exhaust gas emission assembly includes an exhaust pipe (500). A pressure maintaining valve (600), a burner (700) and a neutralizer (800) are sequentially arranged on the exhaust pipe (500); the burner (700) is sequentially provided with a bell cover (702), a linear combustion tank (703) and an air inlet assembly from the air inlet end to the air outlet end; a first air gap (73) is left between the bell mouth edge of the bell cover (702) and the inner wall of the burner (700); a heating wire is arranged in the linear combustion tank (703), one end of the linear combustion tank (703) is inserted into the bell cover (702), and a second air gap (74) is evenly left between the outer wall of the linear combustion tank (703) and the inner wall of the bell cover (702); the air inlet assembly is arranged corresponding to the second air gap (74) and is used for evenly pushing the exhaust gas into the bell mouth.

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