Device and method for spherical body forming

Abstract

A device and method for spherical molding, including an extrusion unit, a cutting unit and a ball rubbing unit; the extrusion unit includes a feed trough, one end of which is correspondingly provided with an extrusion rod, and the other end is correspondingly provided with an extrusion chamber, the extrusion rod pushes the clay into the extrusion chamber for extrusion; the end of the extrusion chamber is provided with a clay outlet hole; the cutting unit is located at the clay outlet end, including a rotating blade, the rotating blade is connected to a driving structure, and is used to drive the rotating blade to rotate and cut; the ball rubbing unit includes an upper rubbing plate and a lower rubbing plate parallel to each other, the upper rubbing plate is connected to an upper driving mechanism, and the lower rubbing plate is connected to a lower driving mechanism; the gap formed between the upper rubbing plate and the lower rubbing plate is a clay rubbing space, and the clay cut off by the rotating blade enters the gap from one end; the ball rubbing unit is supported by a second support frame. It can mass-produce ceramic or catalyst carrier balls with porous surfaces, and the size of the balls and the holes outside or inside can be adjusted according to demand.

Description

Technical Field

[0001] The invention relates to the technical field of spherical catalyst carrier manufacturing, and in particular to a sphere forming device and method. Background Art

[0002] In the production process of polyurethane and other products, a spherical catalyst carrier with a diameter of 1 to 6 mm is involved. A layer of active substance is loaded on the surface of the carrier to form a catalyst. The catalyst carrier is spherical and has a large number of hollow channels on the outer surface of the sphere. A large number of channels are used to load the active substance.

[0003] During the chemical reaction process, there are endothermic and exothermic reactions. When the heat is too large, it is necessary to discharge the heat in time to avoid excessive temperature. Too high reaction temperature will affect the yield of the target product and even make the catalyst ineffective. When the reaction temperature is too low, heat needs to be supplied to the reaction device. At this time, the device needs to have good heat absorption and heat storage materials so that the supplied heat can be absorbed and stored in the reaction device.

[0004] The porous ceramic balls on the surface have good heat storage and high thermal conductivity. They can not only absorb heat but also diffuse the excess heat when there is excess energy, avoiding "temperature runaway" and allowing the entire reaction device to operate smoothly within a certain range, thereby improving reaction efficiency and reducing energy consumption.

[0005] In summary, the active substances involved in the reaction are loaded on the surface of the porous sphere. The good heat storage and high thermal conductivity enable the sphere to play the role of energy buffer, making temperature regulation during the reaction more convenient and more energy-efficient.

[0006] At present, this kind of spherical catalyst carrier has not been quantified in my country, and most of them are imported products. The high cost not only adds burden to enterprises, but also consumes national foreign exchange. Therefore, it is very meaningful to develop a domestic product to replace imports.

[0007] Traditional processes for producing ceramic or catalyst carrier balls with a diameter of less than 5 mm mostly use rolling, oil plug, molding and other molding processes. The balls produced have a smooth surface, and it is difficult to produce small balls with holes larger than 0.1 mm on the outer surface of the sphere, and the size of the ball is not easy to adjust. Currently, there is no process or equipment on the market that can be used for mass production. Summary of the invention

[0008] In view of the above-mentioned deficiencies of the prior art, the present invention provides a sphere forming device capable of mass-producing ceramic or catalyst carrier spheres with porous surfaces, wherein the size of the spheres and the pores outside or inside the spheres can be adjusted as required.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sphere forming device, which includes an extrusion unit, a cutting unit and a ball rolling unit;

[0010] The extrusion unit comprises a feed trough, one end of the feed trough is correspondingly provided with an extrusion rod, and the other end is correspondingly provided with an extrusion cavity, the extrusion rod pushes the clay placed in the feed trough into the extrusion cavity for extrusion; the end of the extrusion cavity is provided with a clay outlet hole for extruding the extruded clay from the extrusion cavity; the extrusion unit is supported by a first support frame;

[0011] The cutting unit is located at the mud material outlet end, and includes a rotating blade for cutting mud strips coming out of the mud material outlet hole. The rotating direction of the rotating blade is perpendicular to the mud material outlet direction. The rotating blade is connected to the driving structure and is used to drive the rotating blade to rotate and cut.

[0012] The ball rubbing unit includes an upper rubbing board and a lower rubbing board which are parallel to each other. The upper rubbing board is connected to an upper driving mechanism, and the lower rubbing board is connected to a lower driving mechanism. Under the action of the driving mechanism, the upper rubbing board and the lower rubbing board can move perpendicularly to each other to rub the clay into a ball shape; the gap formed between the upper rubbing board and the lower rubbing board is a clay rubbing space, and the clay cut off by the rotating blade enters the gap from one end; the ball rubbing unit is supported by a second supporting frame.

[0013] Furthermore, the extrusion rod of the extrusion unit is a piston rod, one end of which is connected to the propulsion structure, and the other end is used to propel and extrude the mud in the feed trough; the use of this structure can effectively achieve the extrusion of mud, and the operation is convenient. The propulsion structure can be a motor, a cylinder, or a hydraulic cylinder, etc., which can realize the reciprocating motion of the piston rod.

[0014] Furthermore, an end baffle is provided at the end of the extrusion chamber, and the mud outlet hole is located on the end baffle, and the mud outlet hole can be one or more; with this structure, the mud is extruded under the action of the extrusion rod and the end baffle, and then discharged from the mud outlet hole to form mud strips.

[0015] Furthermore, the driving structure of the cutting unit is a motor, and the rotating blade is connected to the output shaft of the motor; the above structure can realize the circumferential rotation of the rotating blade to cut the clay extruded from the clay outlet hole.

[0016] Furthermore, the ball rubbing unit also includes a base and a support frame connected to the base, the support frame includes a support rod, one end of the support rod is fixed to the base, and the support rod is also provided with a first support plate and a second support plate; the upper rubbing plate is slidably fitted on the first support plate, and the lower rubbing plate is slidably fitted on the second support plate.

[0017] Furthermore, the upper driving mechanism includes a first motor, the first motor is transmission-connected with the first screw rod, the first screw rod is threaded with a first moving block, and the first moving block is fixedly connected to the upper wash board; a slider is also provided on the upper wash board, and the slider is slidingly connected to the first slide rail on the first support plate; with this structure, driven by the first motor, the screw rod rotates, driving the first moving block to reciprocate along the length direction of the screw rod, and the upper wash board also reciprocates along the length direction of the first screw rod under the joint action of the first moving block, the first slider and the first slide rail, thereby realizing the linear motion of the upper wash board.

[0018] Furthermore, the lower driving mechanism includes a second motor, the second motor is transmission-connected to the second screw rod, the second screw rod is threadedly equipped with a second moving block, and the second moving block is fixedly connected to the lower scrubbing board; a slider is also provided on the lower scrubbing board, and the slider is slidably connected to the second slide rail on the second support plate; with this structure, driven by the second motor, the screw rod rotates, driving the second moving block to reciprocate along the length direction of the screw rod, and the upper scrubbing board also reciprocates along the length direction of the second screw rod under the joint action of the second moving block, the second slider and the second slide rail, thereby realizing the linear motion of the lower scrubbing board.

[0019] Furthermore, the length extension directions of the first screw and the second screw are perpendicular to each other; this structure ensures that when the upper rubbing plate moves left and right, the corresponding lower rubbing plate moves forward and backward, or when the lower rubbing plate moves left and right, the corresponding upper rubbing plate moves forward and backward; thereby effectively achieving the perpendicular movement directions of the upper and lower rubbing plates, thereby obtaining spherical mud.

[0020] Furthermore, the feeding end of the upper scrubbing board is provided with an opening section extending obliquely upward, and the arrangement of this structure facilitates the mud material to enter the gap formed by the upper and lower scrubbing boards without escaping.

[0021] Furthermore, side plates are arranged on the left and right sides of the lower rubbing board, and the upper rubbing board is located between the two side plates and separated by a gap. In this way, the setting of the side plates can better ensure that the clay will not run away during the ball rubbing process, and the setting of the gap can ensure that the upper rubbing board can move left and right in the gap.

[0022] Furthermore, a telescopic plate is connected to the ends of the upper washboard close to the left and right side walls of the lower side plate, and the telescopic plate is always pressed against the left and right side plates of the lower washboard; this structure can prevent some mud from leaking out of the gap between the upper washboard and the side plates of the lower washboard, and at the same time, because it can be telescopic, even if the upper washboard slides left and right, it can still be pressed against the side plates to fill the gap.

[0023] Furthermore, the ball rubbing unit also includes a device for adjusting the distance between the upper and lower rubbing boards, and the distance adjusting device includes a fixed seat fixed on the first support plate, and the fixed seat is provided with a threaded rod, the other end of the threaded rod is connected to a rotating gripping part, and the threaded rod is threadedly connected to a threaded sleeve, and the threaded sleeve is fixed to the third support plate, and the third support plate is slidably connected to the second support plate through a support column; when the structure is used, when it is necessary to adjust the distance between the upper and lower rubbing boards, it is only necessary to hold the rotating gripping part and rotate it, which will drive the threaded rod to rotate in the threaded sleeve, and the fixed seat can be connected to the threaded rod through a bearing, and the threaded rod will drive the first support plate and the upper rubbing board to move up and down along the support column during the rotation process, thereby adjusting the gap distance between the lower rubbing board and realizing the preparation of mud balls of different diameters.

[0024] Furthermore, a position adjustment groove is provided on the second supporting frame, one end of the ball rubbing unit is rotatably connected to the second supporting frame, and the other end is fixed in the position adjustment groove by a tensioning structure; the setting of this structure can adjust the inclination direction of the entire ball rubbing unit and the horizontal plane to a limited extent.

[0025] The present invention also provides a method for preparing a spherical ceramic or catalyst carrier using the above-mentioned spherical molding device, which specifically comprises:

[0026] (1) Prepare a clay material of ceramic or catalyst carrier, then feed the clay material into a feed trough, start the extrusion rod, push the clay material into the extrusion chamber, and continue to push the clay material forward to the end baffle at the end of the extrusion chamber, and press the clay material into a continuous cylindrical strip through the clay outlet hole thereon;

[0027] (2) Start the rotating blade to cut the cylindrical strips squeezed out from the mud outlet hole, and the cylindrical strips fall into the gap between the upper and lower washboards. The two washboards are parallel to each other and their displacement directions are perpendicular to each other. The cylindrical strips that fall into them are rubbed to obtain balls, and the cylindrical strips fall out of the gap between the upper and lower washboards along the gap during the movement to obtain spherical ceramics or catalyst carriers.

[0028] Preferably, the angle between the upper and lower washboards and the horizontal plane is 15-45°.

[0029] Preferably, the advancement speed of the extrusion rod is preferably 0.2 sec to 5 sec / mm.

[0030] Preferably, the displacement distance of the upper and lower rubbing boards is 5 to 200 mm, preferably 10 to 50 mm.

[0031] Preferably, the displacement cycle frequency of the upper and lower washboards is 0.2 to 10 times / second, preferably 1 to 3 times / second.

[0032] Preferably, the spacing between the upper rubbing board and the lower rubbing board is based on the size requirements of the ball to be rubbed, generally 0.01 to 1 mm larger than the sphere, preferably 0.1 to 0.3 mm larger than the sphere.

[0033] The method of the present invention is easy to operate, and the obtained spherical carrier is easy to discharge with high efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 An angular structural schematic diagram of the sphere forming device of the present invention.

[0035] Figure 2 Another perspective structural schematic diagram of the sphere forming device of the present invention.

[0036] Figure 3 A schematic diagram of an angle structure of a ball-rubbing unit in ball forming of the present invention.

[0037] Figure 4 Another schematic structural diagram of the ball rolling unit in the ball forming of the present invention at another angle.

[0038] Figure 5 A schematic diagram showing the visible driving structure of the rubbing plate on the ball rubbing unit in the ball forming of the present invention.

[0039] Figure 6 A schematic diagram showing the visible driving structure of the lower rubbing plate of the rubbing unit in the sphere forming of the present invention.

[0040] Figure 7 A schematic diagram of the upper washboard structure in sphere forming of the present invention.

[0041] Figure 8 A schematic structural diagram of the upper and lower washboards used in sphere forming according to the present invention. DETAILED DESCRIPTION

[0042] The present invention is further described in detail below by way of examples, but the present invention is not limited to the following examples.

[0043] As attached Figure 1-2 As shown: the sphere forming device of this embodiment includes a material extrusion unit 101, a cutting unit 102 and a ball rolling unit 103;

[0044] The extrusion unit comprises a feed trough 111, one end of the feed trough is correspondingly provided with an extrusion rod 121, and the other end is correspondingly provided with an extrusion cavity 131, the extrusion rod pushes the clay placed in the feed trough into the extrusion cavity for extrusion; the end of the extrusion cavity is provided with a clay outlet 141 for extruding the extruded clay from the extrusion cavity; the extrusion unit is supported by a first support frame 104;

[0045] The cutting unit is located at the mud material outlet end, and includes a rotating blade 112 for cutting mud strips coming out of the mud material outlet hole. The rotating direction of the rotating blade is perpendicular to the mud material outlet direction. The rotating blade is connected to a driving structure 122 for driving the rotating blade to rotate and cut.

[0046] The ball rubbing unit includes an upper rubbing plate 113 and a lower rubbing plate 123 which are parallel to each other. The upper rubbing plate is connected to an upper driving mechanism 133, and the lower rubbing plate is connected to a lower driving mechanism 143. Under the action of the driving mechanism, the upper rubbing plate and the lower rubbing plate can move perpendicularly to each other to rub the clay into a ball shape. The gap formed between the upper rubbing plate and the lower rubbing plate is a clay rubbing space, and the clay cut by the rotating blade enters the gap from one end. The ball rubbing unit is supported by a second supporting frame 105.

[0047] In this embodiment, a cover plate or a cover box can be provided above the feed chute to prevent other impurities from being introduced into the feed chute and affecting the use effect.

[0048] More specific details are as follows Figure 1-2 As shown, the extrusion rod of the extrusion unit is a piston rod, one end of which is connected to the propulsion structure 151, and the other end is used to propel and extrude the mud in the feed trough; the use of this structure can effectively realize the extrusion of mud, and the operation is convenient. The propulsion structure can be a motor, a cylinder or a hydraulic cylinder, etc., which can realize the reciprocating motion of the piston rod.

[0049] More specific details are as follows Figure 1-2 As shown, an end baffle 161 is provided at the end of the extrusion chamber 131, and the mud outlet hole is located on the end baffle, and there can be multiple mud outlet holes, which can be specifically distributed in the circumferential direction near the edge of the end baffle and evenly distributed in a circle, so that the center position of the rotating blade will not contact the mud strip, and will not affect the rotation and cutting effect of the rotating blade; with this structure, the mud is extruded under the action of the extrusion rod and the end baffle, and then discharged from the mud outlet hole to form a mud strip. Furthermore, the driving structure of the cutting unit can be a motor or other driving device that can drive the rotating blade to rotate circumferentially, and the rotating blade is connected to the output shaft of the motor; the above structure can realize the circumferential rotation of the rotating blade and cut the mud extruded from the mud outlet hole.

[0050] In this embodiment, two extrusion chambers can be provided, and two corresponding end baffles, driving mechanisms, extrusion rods, etc. can be provided, so that the feeding can be more uniform.

[0051] More specifically, as attached Figure 3-4 As shown, the ball rubbing unit also includes a base 106 and a support frame 107 connected to the base, the support frame includes a support rod 117, one end of the support rod is fixed to the base, and the support rod is also provided with a first support plate 127 and a second support plate 137; the upper rubbing plate is slidably fitted on the first support plate, and the lower rubbing plate is slidably fitted on the second support plate.

[0052] Furthermore, as attached Figure 3-6 As shown: the upper driving mechanism 133 includes a first motor 133a, and the first motor is transmission-connected with the first screw rod 133b. Specifically, as shown in the accompanying drawings, a pulley is arranged on the output shaft of the first motor, and a pulley is arranged at the end of the corresponding first screw rod, and the two pulleys are transmission-connected through a transmission belt; after the first motor is started, the first screw rod can be driven to rotate by the transmission belt; the first screw rod is threaded with a first moving block 133c, and the first moving block is fixedly connected to the upper washboard; the upper washboard is also provided with a first slider 133d, and the slider is slidably connected with the first slide rail 133e on the first support plate; with this structure, under the drive of the first motor, the first screw rod rotates to drive the first moving block to reciprocate along the length direction of the screw rod, and the upper washboard also reciprocates along the length direction of the first screw rod under the joint action of the first moving block, the first slider and the first slide rail, thereby realizing the linear motion of the upper washboard.

[0053] Furthermore, as attached Figure 3-6 As shown: the lower driving mechanism 143 includes a second motor 143a, and the second motor 143a is transmission-connected with the second screw rod 143b. Specifically, as shown in the accompanying drawings, a pulley is provided on the output shaft of the second motor, and a pulley is provided at the corresponding end of the second screw, and the two pulleys are transmission-connected through a transmission belt; after the second motor is started, the second screw rod 143b can be driven to rotate by the transmission belt; the second screw rod 143b is threadedly matched with a second moving block 143c, and the second moving block 143c is fixedly connected to the lower scrubbing plate; the lower scrubbing plate is also provided with a second slider 143d, and the second slider is slidably connected with the second slide rail 143e on the second support plate; with this structure, under the drive of the second motor, the screw rod rotates, driving the second moving block to reciprocate along the length direction of the screw, and the upper scrubbing plate also reciprocates along the length direction of the second screw rod under the joint action of the second moving block, the second slider and the second slide rail, thereby realizing the linear motion of the lower scrubbing plate.

[0054] The movement of the upper and lower washboards is that the other end of the screw (i.e., the end away from the end connected to the pulley) is tightly fitted with the screw through a bearing, ensuring that the screw can rotate in a circumferential direction and will not separate from the bearing, and the moving block with the threaded fit in the middle will reciprocate along the length direction of the screw under the drive of the thread on the screw, driving the connected washboard to achieve reciprocating motion. In order to ensure the stability of this movement, a slide rail is provided on the support plate corresponding to the washboard, and a slider is provided on the washboard. The slider is slidably fitted on the slide rail and moves along the slide rail, thereby running more smoothly. Two slide rails corresponding to each washboard can be provided that are parallel to each other.

[0055] Furthermore, the length extension directions of the first screw and the second screw are perpendicular to each other; this structure ensures that when the upper rubbing plate moves left and right, the corresponding lower rubbing plate moves forward and backward, or when the lower rubbing plate moves left and right, the corresponding upper rubbing plate moves forward and backward; thereby effectively achieving the perpendicular movement directions of the upper and lower rubbing plates, thereby obtaining spherical mud.

[0056] As attached Figure 7 As shown: the feeding end of the upper washboard is provided with an opening section 153 extending upward obliquely, and the arrangement of this structure facilitates the mud material to enter the gap formed by the upper and lower washboards without running away. The total length of the upper washboard in the horizontal direction from the end extending upward from the opening section 153 to the other end can be equal to the length of the lower washboard in the corresponding direction.

[0057] As attached Figure 1-2 As shown in FIG. 8 , side plates 163 are arranged on the left and right sides of the lower rubbing board 123, and the upper rubbing board is located between the two side plates and separated from the two side plates by a gap; the setting of the side plates can better ensure that the clay will not run away during the ball rubbing process, and the setting of the gap ensures that the upper rubbing board can move left and right in the gap.

[0058] Furthermore, the ends of the upper washboard close to the left and right side walls of the lower side plate are connected with telescopic plates 173, and the telescopic plates are always pressed against the left and right side plates of the lower washboard; this structure can prevent some mud from leaking out of the gap between the upper washboard and the side plates of the lower washboard, and at the same time, because it can be retracted (similar to a spring), even if the upper washboard slides left and right, it can still be in contact with the two side plates to fill the gap.

[0059] As attached Figure 3-4As shown, the ball rubbing unit also includes an upper rubbing board and a lower rubbing board spacing adjustment device 183, the spacing adjustment device includes a fixed seat 183a fixed on the first support plate, a threaded rod 183b is arranged on the fixed seat, the other end of the threaded rod is connected with a rotating gripping portion 183c, and a threaded sleeve 183d is threadedly connected on the threaded rod, the threaded sleeve is fixed on the third support plate 147, and the third support plate is slidably connected to the second support plate through a support column 117; when the structure is used, when it is necessary to adjust the spacing between the upper and lower rubbing boards, it is only necessary to hold the rotating gripping portion and rotate it, which will drive the threaded rod to rotate in the threaded sleeve, the fixed seat can be connected to the threaded rod through a bearing, and the threaded rod will drive the first support plate and the upper rubbing board to move up and down along the support column during the rotation process, thereby adjusting the gap distance between the lower rubbing board and realizing the preparation of mud balls of different diameters.

[0060] As attached Figure 1-2 , 3-4: The second supporting frame is provided with a position adjustment groove 115, one end of the ball rubbing unit is rotatably connected to the second supporting frame, and the other end is fixed in the position adjustment groove through a tensioning structure; the setting of this structure can adjust the inclination direction of the entire ball rubbing unit and the horizontal plane to a limited extent. Specifically, a rotating shaft 115a is arranged on the base of the ball rubbing unit located at the feeding end. The rotating shaft is rotatably fitted on the second supporting frame and only rotates circumferentially without changing its position. A fixed shaft 115b is arranged on the base of the ball rubbing unit away from the feeding end. Nuts 115c are threadedly fitted at both ends of the fixed shaft. The fixed shaft passes through the position adjustment groove 115. The displacement adjustment groove 115 is arranged on a fixed plate 115d fixed on both sides of the second supporting frame. There are two displacement adjustment grooves and they are symmetrically arranged on the left and right to overlap the fixed shaft between the two grooves. The displacement adjustment groove 115 can be arranged in an arc shape (as shown in the figure, the concave direction of the arc is away from the ball rubbing unit); when the inclination angle of the ball rubbing unit needs to be adjusted, the nuts at both ends of the fixed shaft can be loosened, the fixed shaft can be moved to a suitable position in the displacement adjustment groove, and then the nuts can be tightened to fix the position, and the adjustment is very convenient.

[0061] Specific example of preparing spherical carrier:

[0062] (1) Clay formula: 400 mesh calcined kaolin 600g, 325 mesh calcined alumina powder 200g, alumina dry glue powder 200g, carboxymethyl cellulose 30g, 40 mesh polypropylene particles 100g.

[0063] (2) Mix the ingredients evenly and add 230 g of water to knead into a mud mass.

[0064] (3) Take the mud block and put it into the feed trough, start the piston rod (extrusion rod, which can be hydraulic or cylinder), push the mud material into the inlet of the extruder cavity at a speed of 1 cm / second, and then push the mud material forward at a speed of about 0.2 cm / second. The mud material passes through the 5 mm diameter round hole on the flange plate at the end of the cavity and is extruded into a continuous cylindrical strip, which is then cut into 5 mm long cylinders by a rotating blade.

[0065] (4) The height-to-diameter ratio of the cut cylindrical strip is controlled to be close to 1, and the cylindrical strip falls into the gap between the two washboards. The angle between the two washboards and the horizontal plane is 25°, and the gap between the upper and lower washboards is 5.1 mm.

[0066] (5) The two washboards slide back and forth vertically relative to each other, with a sliding displacement of 3 cm and a back and forth sliding cycle of 1.2 times / second.

[0067] (6) After sliding horizontally and vertically, the mud column becomes a ball and falls out of the rubbing board along the tilt during the movement.

[0068] (7) After the mud balls are dried and calcined at 1250°C, they become porous balls (porous balls are porous).

[0069] The upper rubbing board of this embodiment makes a circular motion back and forth, and the lower rubbing board makes a circular motion back and forth. The two boards move horizontally and vertically, and the two boards form a 25-degree angle with the horizontal plane. The angle with the horizontal plane is controllable, the feeding end is high, and the discharging end is low. The whole process is that the mud material is squeezed into a cylinder, cut by a rotating blade and falls into the space between the two rubbing boards. The two boards move back and forth in a relatively vertical direction to rub the mud segments into small balls. During the rubbing process, the mud balls will roll to the discharging end due to their own gravity, and the rubbing is completed.

[0070] With the above mechanism, the mud material to be processed enters the extrusion cavity from the feed hopper, and the piston pushes the mud material into the cavity. In the process of the mud material entering the cavity, the size of the mud material outlet hole extruded is adjustable. The adjustment method is that the end baffle 161 is set as a flange, and a small hole is opened on the flange. The flange and the cavity are fastened by screws using multiple side walls of the extrusion cavity. The mud strips are cut into mud columns by the rotating blade, and the mud columns fall into the washboard under the action of gravity. The upper and lower washboards are parallel, and the washboards move back and forth perpendicularly to each other to rub the mud columns into small balls. The washboard is placed at an angle to the horizontal plane, with the entrance of the mud column facing upward, and the inclination angle is adjustable.

[0071] The clay material may be a clay material containing a large amount of pore enlarging agent, which is used to form pores on the outer surface or internal pores of the spherical carrier after the product is calcined. The clay material formula is not limited, and the type of pore enlarging agent is not limited; such as boron-containing compounds (boron oxide, boric acid, etc.), powdered polymers (such as polyvinyl alcohol powder, nitrile rubber powder, etc.), and the amount of pore enlarging agent added is reasonably added according to the pore size requirements of the outer surface and internal pores to be prepared, and can be between 0.05-20% of the weight of alumina.

Claims

1. A device for forming spherical ceramics or spherical catalyst carriers, Features: The device comprises an extrusion unit, a cutting unit and a ball rolling unit; the extrusion unit comprises a feed trough, one end of the feed trough is correspondingly provided with an extrusion rod, and the other end is correspondingly provided with an extrusion cavity, the extrusion rod pushes the clay placed in the feed trough into the extrusion cavity for extrusion; the end of the extrusion cavity is provided with a clay outlet hole for extruding the extruded clay from the extrusion cavity; The extrusion unit is supported by a first support frame; the cutting unit is located at the mud material outlet end, and includes a rotating blade for cutting mud strips coming out of the mud material outlet hole, the rotating direction of the rotating blade is perpendicular to the mud material outlet direction, and the rotating blade is connected to a driving structure for driving the rotating blade to rotate and cut; The ball rubbing unit comprises an upper rubbing board and a lower rubbing board which are parallel to each other. The upper rubbing board is connected to an upper driving mechanism, and the lower rubbing board is connected to a lower driving mechanism. Under the action of the driving mechanism, the upper rubbing board and the lower rubbing board move perpendicularly to each other to rub the clay into a ball shape. The gap formed between the upper rubbing board and the lower rubbing board is a clay rubbing space, and the clay cut by the rotating blade enters the gap from one end. The ball rubbing unit is supported by a second supporting frame. The ball rubbing unit further comprises a base and a support frame connected to the base, wherein the support frame comprises a support rod, one end of which is fixed to the base, and a first support plate and a second support plate are also provided on the support rod; the upper rubbing plate is slidably matched to the first support plate, and the lower rubbing plate is slidably matched to the second support plate; The upper driving mechanism includes a first motor, the first motor is connected to the first screw rod, the first screw rod is threaded with a first moving block, and the first moving block is fixedly connected to the upper washboard; a slider is also provided on the upper washboard, and the slider is slidably connected to the first slide rail on the first support plate; the lower driving mechanism includes a second motor, the second motor is connected to the second screw rod, the second screw rod is threaded with a second moving block, and the second moving block is fixedly connected to the lower washboard; a slider is also provided on the lower washboard, and the slider is slidably connected to the second slide rail on the second support plate; The length extension directions of the first lead screw and the second lead screw are perpendicular to each other; An end baffle is arranged at the end of the extrusion cavity, and the mud material outlet hole is located on the end baffle, and there are multiple mud material outlet holes.

2. The device for forming spherical ceramics or spherical catalyst carriers according to claim 1, Features: The extrusion rod of the extrusion unit is a piston rod, one end of the piston rod is connected to the propulsion structure, and the other end is used to propel and extrude the mud material in the feed trough.

3. The device for forming spherical ceramics or spherical catalyst carriers according to claim 1, Features: The driving structure of the cutting unit is a motor, and the rotating blade is connected to the output shaft of the motor. The above structure can realize the circumferential rotation of the rotating blade to cut the clay extruded from the clay outlet hole.

4. The device for forming spherical ceramics or spherical catalyst carriers according to claim 1, Features: The feeding end of the upper rubbing plate is provided with an opening section extending obliquely upward.

5. The device for forming spherical ceramics or spherical catalyst carriers according to claim 4, Features: The ends of the upper rubbing board close to the left and right side walls of the lower side board are connected with telescopic boards, and the telescopic boards are always pressed tightly against the left and right side boards of the lower rubbing board.

6. The device for forming spherical ceramics or spherical catalyst carriers according to claim 1, Features: The left and right sides of the lower rubbing board are provided with side boards, and the upper rubbing board is located between the two side boards and is spaced apart from the two side boards by a gap.

7. The device for forming spherical ceramics or spherical catalyst carriers according to claim 1, Features: The ball rubbing unit also includes a device for adjusting the distance between the upper rubbing plate and the lower rubbing plate, and the distance adjusting device includes a fixing seat fixed on the first support plate, a threaded rod is arranged on the fixing seat, a rotating gripping portion is connected to the other end of the threaded rod, and a threaded sleeve is threadedly connected to the threaded rod, and the threaded sleeve is fixed on the third support plate, and the third support plate is slidably connected to the second support plate through a support column.

8. The device for forming spherical ceramics or spherical catalyst carriers according to claim 1, Features: The second supporting frame is provided with a position adjusting groove, one end of the ball rubbing unit is rotatably connected to the second supporting frame, and the other end is fixed in the position adjusting groove through a tensioning structure.

9. A method for preparing spherical ceramics or catalyst carriers using the device for forming spherical ceramics or spherical catalyst carriers according to claim 1, Features: Specifically include: (1) Prepare a clay material of ceramic or catalyst carrier, then feed the clay material into a feed trough, start the extrusion rod, push the clay material into the extrusion chamber, and continue to push the clay material forward to the end baffle at the end of the extrusion chamber, and press the clay material into a continuous cylindrical strip through the clay outlet hole thereon; (2) Start the rotating blade to cut the cylindrical strips squeezed out from the mud outlet hole, and the cylindrical strips fall into the gap between the upper and lower washboards. The two washboards are parallel to each other and their displacement directions are perpendicular to each other. The cylindrical strips that fall into them are rubbed to obtain balls, and the cylindrical strips fall out of the gap between the upper and lower washboards along the gap during the movement to obtain spherical ceramics or catalyst carriers.

10. A method for preparing spherical ceramics or catalyst carriers according to the device for molding spherical ceramics or spherical catalyst carriers according to claim 9, Features: The angle between the upper and lower washboards and the horizontal plane is 15-45 degrees, the advancement speed of the extrusion rod is 0.2 seconds to 5 seconds / mm; the displacement distance of the upper and lower washboards is 5-200mm; the cycle frequency of the displacement of the upper and lower washboards is 0.2-10 times / second.

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