A device and method for removing an alumina mandrel in a hollow blade

Abstract

The present invention relates to the technical field of processing of hollow blade mandrels, and specifically to a device and method for removing alumina mandrels from hollow blades, including a reaction kettle and a kettle cover. A driving motor is arranged on the kettle cover, and a rotating rod is arranged on the driving motor. There are also multiple bearing seats; an installation mechanism arranged on the kettle cover; multiple moving seats; a reciprocating mechanism arranged on the installation mechanism; a switching mechanism arranged on the installation mechanism. This device and method for removing alumina mandrels from hollow blades, different from the prior art, when in use by staff, use the installation mechanism to install and fix the hollow blades on the bearing seats, use the switching mechanism to control the installation mechanism to drive the hollow blades to rotate and accelerate the reaction rate, control the reciprocating mechanism to drive the moving seats to displace, and knock and vibrate the hollow blades, so that the reacted part is forced to break away, enhancing the chemical reaction rate and improving the removal efficiency of the ceramic core and the alumina mandrel, and improving the production efficiency and core removal quality.

Description

Technical Field

[0001] The present invention relates to the technical field of processing of hollow blade mandrels, and particularly to a device and a method for removing an alumina mandrel from a hollow blade. Background Art

[0002] A hollow blade is a turbine blade with an internal cavity made for purposes such as cooling, stress reduction, frequency modulation, and processing technology, and is widely used in equipment such as aeroengines and gas turbines that operate at high temperatures, high pressures, and high speeds; modern casting techniques mostly form a cavity air-cooling channel inside the blade by prefabricating a ceramic core so that under working conditions of high temperature and high-strength load, gas can flow in a complex cavity to cool the blade; during the casting production process, the ceramic core needs to withstand long-term immersion in high-temperature molten alloy and certain pressure during the alloy cooling and shrinking process, and this process has higher and higher requirements for the strength, high-temperature resistance, etc. of the ceramic core. The previous ceramic core materials were mainly silica, and their strength and high-temperature resistance gradually cannot meet the actual production needs, so an appropriate-diameter alumina mandrel is added to the traditional silica ceramic core as a solution to increase the strength of the ceramic core.

[0003] After the existing hollow blade mold is completed, it is necessary to remove the ceramic core and the alumina mandrel. The traditional chemical core removal method is to immerse the blade in a potassium hydroxide solution in a medium-temperature and low-pressure reaction kettle body, and through the chemical reaction between the silicon-based component and potassium hydroxide, it plays a role in dissolving the ceramic core and the alumina mandrel; due to the large and complex cavity of the heavy gas turbine hollow blade, but its internal channel is small, simply using the chemical immersion method takes a long time to dissolve the alumina mandrel, and the heavy gas turbine blade is mainly made of nickel-based superalloy, and the potassium hydroxide solution will corrode the blade, and long-term corrosion will cause intergranular corrosion of the blade and even scrapping; for this reason, we propose a device and a method for removing an alumina mandrel from a hollow blade. Summary of the Invention

[0004] A technical problem to be solved by the present application is: how to enhance the chemical reaction rate, improve the removal efficiency of the ceramic core and the alumina mandrel, and improve the production efficiency and core removal quality of batch production of hollow blades during the core removal process of hollow blades.

[0005] To solve the above technical problem, an embodiment of the present application provides a device for removing an alumina mandrel from a hollow blade, including a reaction kettle, a kettle cover is arranged on the reaction kettle, a driving motor is arranged above the kettle cover, a rotating rod is arranged on the driving motor, and further includes:

[0006] A bearing seat, there are a plurality of the bearing seats, and all the plurality of bearing seats are arranged below the rotating rod;

[0007] An installation mechanism, which is used to install and fix the hollow blades on multiple said bearing seats and is arranged on the kettle cover;

[0008] Moving seats, a plurality of said moving seats are provided, and the plurality of said moving seats are respectively arranged on one side of a plurality of bearing seats;

[0009] A reciprocating mechanism, which is used to drive the plurality of said moving seats to reciprocate and displace, knock and vibrate the plurality of hollow blades, and is arranged on the said installation mechanism;

[0010] A switching mechanism, which is used to switch the output state of the rotating rod, respectively control the said installation mechanism to drive the hollow blade to rotate, control the operation of the said reciprocating mechanism, and is arranged on the said installation mechanism.

[0011] In some embodiments, the installation mechanism includes a fixed disk arranged on the kettle cover, a fitting ring is arranged below the fixed disk, an adapter ring is arranged on the fitting ring, the fitting ring is rotatably connected to the fixed disk through the adapter ring, and a plurality of vertical rods are arranged on the fitting ring;

[0012] Below the plurality of said vertical rods is provided a loading component for loading and supporting the hollow blades.

[0013] In some embodiments, the loading component includes a bearing disk arranged below the plurality of vertical rods, a plurality of said bearing seats are all arranged on the bearing disk, a turntable is rotatably arranged on the bearing disk, a plurality of connecting plates are arranged on the turntable, a pushing seat is arranged at one end of each of the plurality of connecting plates, and a torsion spring is arranged at the rotating connection part between the turntable and the bearing disk;

[0014] A limiting member is arranged on the bearing disk for limiting the positions of the plurality of said pushing seats.

[0015] In some embodiments, the limiting member includes a convex block arranged on the bearing disk, a convex plate is arranged on the convex block, a screw rod is threadedly connected to the convex plate, a convex disk is arranged at one end of the screw rod, a pushing plate is arranged at the other end of the screw rod, a handle is arranged on the convex disk, and a bolt is threadedly connected to the convex disk, and the bolt is threadedly connected to the convex plate.

[0016] In some embodiments, the reciprocating mechanism includes a moving ring slidably arranged on the plurality of vertical rods, a plurality of connecting cylinders are arranged on the moving ring, a connecting column is arranged on each of the plurality of moving seats, and a connecting spring is arranged between each of the plurality of connecting columns and the connecting cylinder;

[0017] A moving component is arranged on the moving ring for driving the moving ring and the plurality of moving seats to reciprocate and displace.

[0018] In some embodiments, the moving component includes a moving plate disposed on a moving ring. A reciprocating ring seat is arranged on the moving plate. An arc-shaped bar is arranged between the two vertical rods. The moving plate is slidably connected to the arc-shaped bar. A fixing plate is arranged on the arc-shaped bar. An output shaft is rotatably arranged on the fixing plate. A rotating plate is arranged on the output shaft. A deflection column matching the reciprocating ring seat is arranged on the rotating plate.

[0019] In some embodiments, the switching mechanism includes a sliding cylinder slidably arranged on a rotating rod. Sliding seats are arranged at both the upper and lower ends of the sliding cylinder. A plurality of deflection wedges are arranged on each of the two sliding seats. Two cross plates are arranged on each of the plurality of vertical rods. A cross disk is arranged between the corresponding plurality of cross plates. A connecting rod is arranged on the turntable. A convex seat is arranged at the top of the connecting rod. A plurality of first driven wedges are arranged in the convex seat. A coaxial gear is rotatably arranged on the rotating rod. A notch is arranged on the coaxial gear. A plurality of second driven wedges are arranged in the notch.

[0020] A displacement component is arranged on the fixed disk for driving the sliding seat to displace.

[0021] A transmission component is arranged on one of the cross disks for driving the output shaft to rotate.

[0022] In some embodiments, the displacement component includes a push rod arranged on the fixed disk. An arc plate is arranged on the push rod. The arc plate is in fit with the sliding seat.

[0023] In some embodiments, the transmission component includes an adapter plate arranged on the cross disk. A vertical shaft is rotatably arranged on the adapter plate. A transmission gear is arranged on the vertical shaft. The transmission gear is meshed with the coaxial gear. A first bevel gear is arranged on the vertical shaft. A second bevel gear is arranged on the output shaft. The second bevel gear is meshed with the first bevel gear.

[0024] A method for removing an alumina core rod from a hollow blade, which is applied to the above-mentioned device for removing an alumina core rod from a hollow blade, includes the following steps:

[0025] Step 1: Install the hollow blade: Place the hollow blade in the bearing seat, and use the limiting member to install and position-limit the hollow blade.

[0026] Step 2: Chemically remove the core for the first time: Place the hollow blade in a kettle body containing potassium hydroxide solution at medium temperature and low pressure: the solution concentration is 35%-45%, the solution temperature is 170°C - 19°C, the pressure in the kettle body is 2 bar - 10 bar. After placing and reacting for 10 h - 30 h, take out the blade and rinse it with a water gun at 5 bar pressure for 5 min.

[0027] Step 3: Secondary chemical core removal: Place the blades after primary chemical core removal in a kettle body with medium temperature and medium pressure containing potassium hydroxide solution: the solution concentration is 35%-45%, the solution temperature is 190°C-250°C, the pressure in the kettle body is 2 bar-40 bar. After placing for a reaction time of 10 h-30 h, take out the blades and rinse them with a water gun at 5 bar pressure for 5 min;

[0028] Step 4: Tertiary chemical core removal: Place the blades after secondary chemical core removal in a kettle body with medium temperature and medium pressure containing sodium hydroxide solution: the solution concentration is 35%-45%, the solution temperature is 190°C-250°C, the pressure in the kettle body is 2 bar-40 bar. After placing for a reaction time of 10 h-30 h, take out the blades and rinse them with a water gun at 5 bar pressure for 5 min; When reacting in the kettle, the switching mechanism controls the installation mechanism to drive the hollow blades to rotate; the switching mechanism controls the reciprocating mechanism to operate, drives the plurality of moving seats to reciprocate, and knocks and vibrates the plurality of hollow blades;

[0029] Step 5: Citric acid neutralization: Place the blades after tertiary core removal in dilute citric acid with pneumatic stirring for neutralization for 10 min;

[0030] Step 6: Cleaning and drying: Place the blades after citric acid neutralization in clean water with pneumatic stirring for rinsing for 5 min.

[0031] The present invention has at least the following beneficial effects:

[0032] Different from the prior art, when the staff uses the device and method for removing the alumina core rod from the hollow blade, the installation mechanism is used to install and fix the hollow blades on the plurality of bearing seats, the switching mechanism is used to switch the output state of the rotating rod, control the installation mechanism to drive the hollow blades to rotate and accelerate the reaction rate, control the reciprocating mechanism to drive the plurality of moving seats to reciprocate, knock and vibrate the plurality of hollow blades, so that the reacted part is forced to break away. During the core removal process of the hollow blades, the chemical reaction rate is enhanced, the removal efficiency of the ceramic core and the alumina core rod is improved, and the production efficiency and core removal quality of the hollow blades in batch are improved. Description of the Drawings

[0033] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0034] Figure 2 For the present invention Figure 1 Partial sectional structure schematic diagram;

[0035] Figure 3 For the present invention Figure 2 Partial sectional structure schematic diagram;

[0036] Figure 4 It is a schematic diagram of the structure of the installation mechanism of the present invention;

[0037] Figure 5 Structural schematic diagram of the carrier seat, bearing plate, and limiting member of the present invention;

[0038] Figure 6 Structural schematic diagram of the connecting rod, turntable, connecting plate, thrust seat, and torsion spring of the present invention;

[0039] Figure 7 Structural schematic diagram of the limiting member of the present invention;

[0040] Figure 8 Structural schematic diagram of the reciprocating mechanism of the present invention;

[0041] Figure 9 Structural schematic diagram of the moving component of the present invention;

[0042] Figure 10 Structural schematic diagram of the switching mechanism of the present invention;

[0043] Figure 11 Structural schematic diagram of the sliding cylinder, sliding seat, deflection wedge block, and displacement component of the present invention;

[0044] Figure 12 Structural schematic diagram of the connecting rod, convex seat, and first driven wedge block of the present invention;

[0045] Figure 13 Structural schematic diagram of the transmission component of the present invention;

[0046] Figure 14 Structural schematic diagram of the coaxial gear, notch, and second driven wedge block of the present invention.

[0047] In the figure: 1, reaction kettle; 2, kettle cover; 3, drive motor; 4, rotating rod; 5, bearing seat; 6, mounting mechanism; 61, fixed disk; 62, fitting ring; 63, connecting ring; 64, vertical rod; 7, moving seat; 8, reciprocating mechanism; 81, moving ring; 82, connecting cylinder; 83, connecting column; 84, connecting spring; 9, switching mechanism; 91, sliding cylinder; 92, sliding seat; 93, deflecting wedge; 94, cross plate; 95, cross disk; 96, connecting rod; 97, convex seat; 98, first driven wedge; 99, coaxial gear; 910, notch; 911, second driven wedge; 10, loading assembly; 101, bearing plate; 102, turntable; 103, connecting plate; 104, pushing seat; 105, torsion spring; 11, limiting member; 111, convex block; 112, convex plate; 113, screw rod; 114, convex disk; 115, pushing plate; 116, handle; 117, bolt; 12, moving assembly; 121, moving plate; 122, reciprocating ring seat; 123, arc-shaped strip; 124, fixing plate; 125, output shaft; 126, rotating plate; 127, deflecting column; 13, shifting assembly; 131, push rod; 132, arc plate; 14, transmission assembly; 141, connecting plate; 142, vertical shaft; 143, transmission gear; 144, first bevel gear; 145, second bevel gear. Detailed implementation manners

[0048] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] Please refer to Figure 1 - Figure 2 , the present invention provides a technical solution:

[0050] A device for removing an alumina core rod from a hollow blade includes a reaction kettle 1, a kettle cover 2 is arranged on the reaction kettle 1, a drive motor 3 is arranged above the kettle cover 2, a rotating rod 4 is arranged on the drive motor 3, and a liquid inlet pipe, a liquid outlet pipe, a thermometer, a pressure gauge and other components are arranged on the reaction kettle 1 for entering and discharging solutions, detecting the temperature and pressure of the reaction kettle 1, etc. When the drive motor 3 is started, it drives the rotating rod 4 to rotate. The drive motor 3 is externally connected to a moving frame component, and the moving frame component controls the lifting and moving of the drive motor 3, thereby controlling the opening and closing of the kettle cover 2. The specific control and use of the reaction kettle 1, the principle and step method of the chemical reaction will not be elaborated here. It further includes:

[0051] Bearing seats 5, a plurality of bearing seats 5 are arranged, and the plurality of bearing seats 5 are all arranged below the rotating rod 4;

[0052] The installation mechanism 6 is used to install and fix the hollow blades on multiple bearing seats 5 and is arranged on the kettle lid 2;

[0053] The moving seats 7 are provided in plurality, and the plurality of moving seats 7 are respectively arranged on one side of the plurality of bearing seats 5;

[0054] The reciprocating mechanism 8 is used to drive the plurality of moving seats 7 to reciprocate and displace, knock and vibrate the plurality of hollow blades, and is arranged on the installation mechanism 6;

[0055] The switching mechanism 9 is used to switch the output state of the rotating rod 4, respectively control the installation mechanism 6 to drive the hollow blade to rotate, and control the operation of the reciprocating mechanism 8, and is arranged on the installation mechanism 6.

[0056] Please refer to Figure 3 , the installation mechanism 6 includes a fixed disk 61 arranged on the kettle lid 2, a fitting ring 62 is arranged below the fixed disk 61, a connecting ring 63 is arranged on the fitting ring 62, the fitting ring 62 is rotationally connected with the fixed disk 61 through the connecting ring 63, and a plurality of vertical rods 64 are arranged on the fitting ring 62.

[0057] Please refer to Figure 3 - Figure 6 , a loading assembly 10 is arranged below the plurality of vertical rods 64 for loading and supporting the hollow blades; the loading assembly 10 includes a loading disk 101 arranged below the plurality of vertical rods 64, the plurality of bearing seats 5 are all arranged on the loading disk 101, a rotating disk 102 is rotatably arranged on the loading disk 101, a plurality of connecting plates 103 are arranged on the rotating disk 102, a pushing seat 104 is arranged at one end of each of the plurality of connecting plates 103, and a torsion spring 105 is arranged at the rotationally connected part of the rotating disk 102 and the loading disk 101; the bearing seat 5 fits the outer shape of the hollow blade; the hollow blade is placed on the bearing seat 5, and the bearing seat 5 loads and supports the blade; the pushing seat 104 fits the outer shape of the hollow blade, and the pushing seat 104 clamps and fixes the blade; the torsion spring 105 defines the initial positions of the rotating disk 102, the plurality of connecting plates 103, and the plurality of pushing seats 104.

[0058] Please refer to Figure 7, a limiting member 11 is provided on the receiving tray 101 for position-limiting a plurality of pushing seats 104; the limiting member 11 includes a bump 111 provided on the receiving tray 101, a convex plate 112 is provided on the bump 111, a screw rod 113 is threadedly connected to the convex plate 112, a convex disk 114 is provided at one end of the screw rod 113, a pushing plate 115 is provided at the other end of the screw rod 113, a handle 116 is provided on the convex disk 114, a bolt 117 is threadedly connected to the convex disk 114, and the bolt 117 is threadedly connected to the convex plate 112; by rotating the convex disk 114 with the handle 116, the screw rod 113 and the pushing plate 115 are driven to rotate, and the pushing plate 115 pushes the pushing seat 104 to shift, and the pushing seat 104 clamps and fixes the blade; after the convex disk 114 rotates, the bolt 117 can be screwed with the convex plate 112 and cooperate with the screw rod 113 to perform two-point limitation on the convex disk 114, so as to prevent the blade from being misaligned and detached due to the reaction force of the solution during rotation; an anti-corrosion coating can be added to the surfaces of structures such as the screw rod 113 and the bolt 117 to prevent the structures from being eroded by the solution.

[0059] Please refer to Figure 8 , the reciprocating mechanism 8 includes a moving ring 81 slidably provided on a plurality of vertical rods 64, a plurality of connecting cylinders 82 are provided on the moving ring 81, connecting columns 83 are provided on a plurality of moving seats 7, and connecting springs 84 are provided between the plurality of connecting columns 83 and the connecting cylinders 82; the moving ring 81 drives the plurality of connecting columns 83 and the moving seats 7 to displace, and when the moving seat 7 displaces downward, it knocks and vibrates the blade, and the reacted parts of the ceramic core and the alumina core rod in the blade are forced to separate, and the unreacted parts are more likely to contact the solution, further accelerating the overall reaction rate; the connecting spring 84 connects the connecting column 83 and the connecting cylinder 82 and provides a moving and offset space for the moving seat 7; a sealing layer can be provided between components such as the connecting column 83 and the connecting cylinder 82 to prevent the solution from invading and corroding.

[0060] Please refer to Figure 9 , a moving component 12 is provided on the moving ring 81 for driving the moving ring 81 and a plurality of moving seats 7 to perform reciprocating displacement; the moving component 12 includes a moving plate 121 provided on the moving ring 81, a reciprocating ring seat 122 is provided on the moving plate 121, an arc-shaped bar 123 is provided between two vertical rods 64, the moving plate 121 is slidably connected to the arc-shaped bar 123, a fixing plate 124 is provided on the arc-shaped bar 123, an output shaft 125 is rotatably provided on the fixing plate 124, a rotating plate 126 is provided on the output shaft 125, and a deflection column 127 matching the reciprocating ring seat 122 is provided on the rotating plate 126; when the output shaft 125 rotates, it drives the rotating plate 126 and the deflection column 127 to deflect, and the deflection column 127 drives the reciprocating ring seat 122, the moving plate 121, and the moving ring 81 to perform reciprocating displacement.

[0061] Please refer to Figure 10 - Figure 14, the switching mechanism 9 includes a sliding cylinder 91 slidably arranged on the rotating rod 4. Sliding seats 92 are arranged at both the upper and lower ends of the sliding cylinder 91. A plurality of deflection wedges 93 are arranged on both sliding seats 92. Two cross plates 94 are arranged on each of the plurality of vertical rods 64. A cross disc 95 is arranged between the corresponding cross plates 94. A connecting rod 96 is arranged on the turntable 102. A convex seat 97 is arranged at the top of the connecting rod 96. A plurality of first driven wedges 98 are arranged in the convex seat 97. A coaxial gear 99 is rotatably arranged on the rotating rod 4. A notch 910 is arranged on the coaxial gear 99. A plurality of second driven wedges 911 are arranged in the notch 910; when the rotating rod 4 rotates, it drives the sliding cylinder 91, the sliding seats 92, and the deflection wedges 93 to rotate; when the convex seat 97 rotates, it drives the connecting rod 96 and the turntable 102 to rotate, and then drives the blades to rotate. During the rotation of the blades, the solution is stirred to accelerate the reaction rate; in the initial position, the deflection wedges 93 do not contact the first driven wedges 98 and the second driven wedges 911. At this time, the rotation of the deflection wedges 93 will not drive the convex seat 97 and the coaxial gear 99 to rotate.

[0062] Please refer to Figure 11 , a displacement assembly 13 is arranged on the fixed disc 61 for driving the sliding seat 92 to displace; the displacement assembly 13 includes a push rod 131 arranged on the fixed disc 61. An arc plate 132 is arranged on the push rod 131. The arc plate 132 is in contact with the sliding seat 92; when the sliding seat 92 rotates, it will not drive the arc plate 132 to rotate synchronously; when the push rod 131 is activated, it drives the arc plate 132 to displace, and the arc plate 132 drives the sliding cylinder 91, the sliding seats 92, and the deflection wedges 93 to displace, so that after the deflection wedges 93 are displaced, they contact the first driven wedges 98 or the second driven wedges 911.

[0063] Please refer to Figure 13 , a transmission assembly 14 is arranged on one cross disc 95 for driving the output shaft 125 to rotate; the transmission assembly 14 includes an adapter plate 141 arranged on the cross disc 95. A vertical shaft 142 is rotatably arranged on the adapter plate 141. A transmission gear 143 is arranged on the vertical shaft 142. The transmission gear 143 meshes with the coaxial gear 99. A first bevel gear 144 is arranged on the vertical shaft 142. A second bevel gear 145 is arranged on the output shaft 125. The second bevel gear 145 meshes with the first bevel gear 144; when the second driven wedges 911 rotate, they drive the coaxial gear 99, the transmission gear 143, and the first bevel gear 144 to rotate. The first bevel gear 144 drives the second bevel gear 145 and the output shaft 125 to rotate; Protective shells can be arranged outside components such as the coaxial gear 99, the transmission gear 143, and the first bevel gear 144 to prevent the solution from eroding.

[0064] During use, the reaction kettle 1 controls the inlet and outlet of the solution, the temperature of the solution, and the pressure inside the kettle. To save time, the solution can be preheated before entering the reaction kettle 1 to reduce the time for heating the solution.

[0065] When the hollow blade needs to be installed, place the hollow blade on the bearing seat 5. The bearing seat 5 supports the blade. Rotate the convex disk 114 by using the grip 116, driving the screw rod 113 and the pushing plate 115 to rotate. The pushing plate 115 pushes the pushing seat 104 to shift, and the pushing seat 104 clamps and fixes the blade. Then, make the bolt 117 be screwed with the convex plate 112 and cooperate with the screw rod 113 to limit the convex disk 114 at two points, preventing the blade from being displaced and disengaged due to the reaction force of the solution during rotation.

[0066] The rotating rod 4 rotates, driving the sliding cylinder 91, the sliding seat 92, and the deflecting wedge 93 to rotate; the push rod 131 starts, driving the arc plate 132 to displace. The arc plate 132 drives the sliding cylinder 91, the sliding seat 92, and the deflecting wedge 93 to displace, so that the deflecting wedge 93 contacts the first driven wedge 98 or the second driven wedge 911 after displacement.

[0067] When the deflecting wedge 93 contacts the first driven wedge 98, it drives the first driven wedge 98 and the convex seat 97 to rotate. The convex seat 97 drives the connecting rod 96 and the turntable 102 to rotate, and then drives the blade to rotate. The blade agitates the solution during rotation, accelerating the reaction rate.

[0068] When the deflecting wedge 93 contacts the second driven wedge 911, it drives the second driven wedge 911, the coaxial gear 99, the transmission gear 143, and the first bevel gear 144 to rotate. The first bevel gear 144 drives the second bevel gear 145 and the output shaft 125 to rotate. The output shaft 125 drives the rotating plate 126 and the deflecting column 127 to deflect. The deflecting column 127 drives the reciprocating ring seat 122, the moving plate 121, and the moving ring 81 to perform reciprocating displacement. The moving ring 81 drives a plurality of connecting columns 83 and the moving seat 7 to displace. When the moving seat 7 displaces to the lower part, it knocks and vibrates the blade, and the reacted parts of the ceramic core and the alumina core rod in the blade are stressed and separated, and the unreacted parts are more likely to contact the solution, further accelerating the overall reaction rate.

[0069] A method for removing an alumina core rod from a hollow blade, which uses the above-mentioned device for removing an alumina core rod from a hollow blade. The specific principle refers to the above statement and will not be specifically elaborated below. It includes the following steps:

[0070] Step 1: Install the hollow blade: Place the hollow blade in the bearing seat 5, and use the limiting member 11 to install and position-limit the hollow blade;

[0071] Step 2: Chemically remove the core for the first time: Place the hollow blade in a kettle body containing potassium hydroxide solution at medium temperature and low pressure. The solution concentration is 35%-45%, the solution temperature is 170°C - 19°C, the pressure in the kettle body is 2 bar - 10 bar. After placing and reacting for 10 h - 30 h, take out the blade and rinse it with a 5 bar pressure water gun for 5 min;

[0072] Step 3: Secondary chemical core removal: Place the blades that have undergone primary chemical core removal in a kettle body with medium temperature and medium pressure containing potassium hydroxide solution: the solution concentration is 35%-45%, the solution temperature is 190°C-250°C, the pressure in the kettle body is 2 bar-40 bar. After placing for a reaction time of 10 h-30 h, take out the blades and rinse them with a water gun at a pressure of 5 bar for 5 min;

[0073] Step 4: Tertiary chemical core removal: Place the blades that have undergone secondary chemical core removal in a kettle body with medium temperature and medium pressure containing sodium hydroxide solution: the solution concentration is 35%-45%, the solution temperature is 190°C-250°C, the pressure in the kettle body is 2 bar-40 bar. After placing for a reaction time of 10 h-30 h, take out the blades and rinse them with a water gun at a pressure of 5 bar for 5 min; When reacting in the kettle, the switching mechanism 9 controls the installation mechanism 6 to drive the hollow blades to rotate; the switching mechanism 9 controls the reciprocating mechanism 8 to operate, driving a plurality of moving seats 7 to reciprocate, and knocking and vibrating a plurality of hollow blades;

[0074] Step 5: Citric acid neutralization: Place the blades that have undergone tertiary core removal in dilute citric acid with pneumatic agitation for neutralization for 10 min;

[0075] Step 6: Cleaning and drying: Place the blades that have undergone citric acid neutralization in clear water with pneumatic agitation for rinsing for 5 min.

[0076] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0077] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for removing alumina core rods from hollow blades, comprising a reaction kettle (1), the reaction kettle (1) being provided with a kettle cover (2), a driving motor (3) being provided above the kettle cover (2), and a rotating rod (4) being provided on the driving motor (3), characterized in that: Also included are: A bearing seat (5), wherein a plurality of bearing seats (5) are provided, and the plurality of bearing seats (5) are all provided below the rotating rod (4); The mounting mechanism (6) is used for mounting and fixing the hollow blades on the plurality of bearing seats (5), and is arranged on the kettle cover (2); the mounting mechanism (6) comprises a fixing plate (61) arranged on the kettle cover (2); a fitting ring (62) is arranged below the fixing plate (61); a connecting ring (63) is arranged on the fitting ring (62); the fitting ring (62) is rotatably connected to the fixing plate (61) via the connecting ring (63); a plurality of vertical rods (64) are arranged on the fitting ring (62); a loading assembly (10) is arranged below the plurality of vertical rods (64) for receiving and supporting the hollow blades; A movable seat (7), wherein a plurality of movable seats (7) are provided, and the plurality of movable seats (7) are respectively provided on one side of the plurality of bearing seats (5); A reciprocating mechanism (8), used for driving the plurality of movable seats (7) to move back and forth to knock and vibrate the plurality of hollow blades, and arranged on the mounting mechanism (6); A switching mechanism (9) is used to switch the output state of the rotating rod (4), respectively controlling the mounting mechanism (6) to drive the hollow blade to rotate, and controlling the operation of the reciprocating mechanism (8), and is arranged on the mounting mechanism (6); The loading assembly (10) comprises a receiving plate (101) arranged below a plurality of uprights (64); a plurality of the bearing seats (5) are all arranged on the receiving plate (101); a rotating plate (102) is rotatably arranged on the receiving plate (101); a plurality of connecting plates (103) are arranged on the rotating plate (102); a push seat (104) is arranged at one end of the plurality of connecting plates (103); and a torsion spring (105) is arranged at a rotationally connected portion between the rotating plate (102) and the receiving plate (101); The receiving plate (101) is provided with a limiting member (11) for limiting the positions of the plurality of push seats (104); The limiting member (11) comprises a protrusion (111) arranged on the receiving plate (101), a protrusion plate (112) being arranged on the protrusion (111), a spiral rod (113) being threadedly connected to the protrusion plate (112), a protrusion plate (114) being arranged at one end of the spiral rod (113), a push plate (115) being arranged at the other end of the spiral rod (113), a handle (116) being arranged on the protrusion plate (114), a bolt (117) being threadedly connected to the protrusion plate (114), and the bolt (117) being threadedly connected to the protrusion plate (112); The reciprocating mechanism (8) comprises a moving ring (81) slidably arranged on a plurality of vertical rods (64), a plurality of connecting tubes (82) being arranged on the moving ring (81), a plurality of connecting columns (83) being arranged on each of the moving seats (7), and a connecting spring (84) being arranged between each of the connecting columns (83) and the connecting tubes (82); The moving ring (81) is provided with a moving assembly (12) for driving the moving ring (81) and a plurality of moving seats (7) to move back and forth; The moving assembly (12) comprises a moving plate (121) arranged on the moving ring (81), a reciprocating ring seat (122) being arranged on the moving plate (121), an arc-shaped strip (123) being arranged between the two vertical rods (64), the moving plate (121) being slidably connected to the arc-shaped strip (123), a fixing plate (124) being arranged on the arc-shaped strip (123), an output shaft (125) being rotatably arranged on the fixing plate (124), a rotating plate (126) being arranged on the output shaft (125), and a deflection column (127) matching the reciprocating ring seat (122) being arranged on the rotating plate (126); The switching mechanism (9) comprises a slide cylinder (91) slidably arranged on the rotating rod (4), a slide seat (92) being arranged at both upper and lower ends of the slide cylinder (91), a plurality of deflection wedge blocks (93) being arranged on the two slide seats (92), two transverse plates (94) being arranged on the plurality of vertical rods (64), a transverse plate (95) being arranged between the corresponding plurality of transverse plates (94), a connecting rod (96) being arranged on the rotating disk (102), a convex seat (97) being arranged at the top end of the connecting rod (96), a plurality of first driven wedge blocks (98) being arranged in the convex seat (97), a coaxial gear (99) being rotatably arranged on the rotating rod (4), a notch (910) being arranged on the coaxial gear (99), a plurality of second driven wedge blocks (911) being arranged in the notch (910); The fixed plate (61) is provided with a displacement assembly (13) for driving the sliding seat (92) to move; A transmission assembly (14) is disposed on one of the transverse plates (95) and is used to drive the output shaft (125) to rotate.

2. The device for removing alumina core rods from hollow blades according to claim 1, characterized in that: The displacement assembly (13) comprises a push rod (131) arranged on a fixed plate (61), an arc plate (132) being arranged on the push rod (131), and the arc plate (132) is in contact with the slide seat (92).

3. The device for removing alumina core rods from hollow blades according to claim 1, characterized in that: The transmission assembly (14) comprises a connecting plate (141) arranged on the horizontal plate (95), a vertical shaft (142) being rotatably arranged on the connecting plate (141), a transmission gear (143) being arranged on the vertical shaft (142), the transmission gear (143) being meshed with a coaxial gear (99), a first bevel gear (144) being arranged on the vertical shaft (142), a second bevel gear (145) being arranged on the output shaft (125), the second bevel gear (145) being meshed with the first bevel gear (144).

4. A method for removing alumina core rods from hollow blades, applied to the device for removing alumina core rods from hollow blades according to any one of claims 1 to 3, characterized in that: The following steps are involved: Step 1: Installing the hollow blade: placing the hollow blade in the bearing seat (5), and using the limiting member (11) to install and limit the position of the hollow blade; Step 2: One-time chemical de-coring: Place the hollow blades in a kettle containing potassium hydroxide solution at medium temperature and low pressure: the solution concentration is 35%-45%, the solution temperature is 170℃-190℃, the pressure in the kettle is 2bar-10bar, and after the reaction time is 10h-30h, take out the blades and rinse them with a 5bar pressure water gun for 5min; Step 3: Secondary chemical de-coring: Place the blades that have undergone the primary chemical de-coring in a kettle containing potassium hydroxide solution at medium temperature and medium pressure: the solution concentration is 35%-45%, the solution temperature is 190℃-250℃, and the pressure in the kettle is 2bar-40bar. After the reaction time is 10h-30h, take out the blades and rinse them with a 5bar pressure water gun for 5min; Step 4: three-time chemical de-coring: the blades after the second chemical de-coring are placed in a kettle body containing sodium hydroxide solution at medium temperature and medium pressure: the solution concentration is 35%-45%, the solution temperature is 190°C-250°C, and the pressure in the kettle body is 2bar-40bar. After the reaction time is 10h-30h, the blades are taken out and washed with a 5bar pressure water gun for 5min. During the reaction in the kettle, the switching mechanism (9) controls the mounting mechanism (6) to drive the hollow blades to rotate; the switching mechanism (9) controls the reciprocating mechanism (8) to operate, driving the multiple moving seats (7) to move back and forth, thereby knocking and shaking the multiple hollow blades. Step 5: Citric acid neutralization: Place the leaves that have been de-cored three times in pneumatically stirred dilute citric acid for neutralization for 10 minutes; Step 6: Cleaning and drying: Place the leaves neutralized with citric acid in pneumatically stirred clean water for 5 minutes.

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