Extrusion die for honeycomb denitration catalyst

Abstract

The utility model discloses an extrusion die for a honeycomb denitration catalyst, and relates to the technical field of honeycomb denitration catalysts, in particular to the extrusion die for the honeycomb denitration catalyst, which comprises an extrusion die and is used for extruding and shaping the honeycomb denitration catalyst. Comprising an embedding seat integrally formed at the front end of a flange seat, and three shaft seats integrally formed on the outer wall of the flange seat and circumferentially distributed; the mounting mechanism comprises a shaft sleeve rotationally mounted on the shaft seat, a gear fixed on the outer wall of the shaft sleeve, a threaded pin slidably mounted in the shaft seat in a penetrating manner, and a gear ring rotationally mounted on the flange seat, and the outer wall of the threaded pin is in threaded mounting with the interior of the shaft sleeve; the mold mechanism can be quickly disassembled and assembled, the time of the whole operation process is shortened, and the radial compressive strength of a finished product is improved by increasing the taper of the mud inlet hole and the thickness of the mold, increasing the extrusion pressure and density of mud and designing a chamfer which is kept in a certain proportion to the thickness of the inner wall.

Description

Technical Field

[0001] The utility model relates to the technical field of honeycomb denitration catalysts, in particular to an extrusion die for a honeycomb denitration catalyst. Background Art

[0002] Selective catalyst refers to a selective catalyst that reacts with unstable nitrides in flue gas to generate non-toxic and non-polluting nitrogen and water. The most widely used one is the honeycomb denitrification catalyst, which is mainly manufactured by extrusion using an extrusion die;

[0003] According to the public number: CN212312858U, an SCR honeycomb denitration catalyst extrusion die is disclosed. This technology discloses "an SCR honeycomb denitration catalyst extrusion die, including a front module and a rear module bolted to each other, an inwardly concave step groove is arranged on the inner side of the connection port of the front module, and an outwardly convex step shaft is arranged on the inner side of the connection port of the rear module. The radial cross-sections of the step shaft and the step groove are square surfaces with the same surface shape, and the convex shape of the step shaft is consistent with the concave shape of the step groove. When the step shaft is placed in the step groove, the front module and the rear module are coaxially arranged, and the bolt connection holes of the front module and the rear module are located outside the matching position of the front module and the rear module." and other technical solutions, which have "compared with the prior art, it is more ready to complete the assembly faster, reduces the labor intensity of the operators, and improves the production efficiency" and other technical effects;

[0004] The above scheme adopts a matching structure for positioning and supporting the front and rear molds to achieve rapid assembly of the front module and the rear module. However, the front module and the rear module still require multiple sets of bolts for fixing after positioning, which still increases the time cost of the overall operation process to a certain extent. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an extrusion die for a honeycomb deNOx catalyst, which has the characteristics of being able to quickly disassemble and assemble the die structure, thereby improving the time of the overall operation process, and increasing the extrusion pressure and density of the mud material by increasing the taper of the mud inlet hole and the thickness of the die, and designing a chamfer that maintains a certain proportion to the inner wall thickness to improve the radial compressive strength of the finished product.

[0006] To achieve the above purpose, the utility model is implemented by the following technical scheme: an extrusion die of a honeycomb denitration catalyst, including an extrusion die and used for extruding and shaping the honeycomb denitration catalyst, the extrusion die includes:

[0007] The die seat mechanism comprises a fitting seat integrally formed at the front end of the flange seat and three circumferentially distributed shaft seats integrally formed on the outer wall of the flange seat;

[0008] The mounting mechanism comprises a shaft sleeve rotatably mounted on the shaft seat, a gear fixed to the outer wall of the shaft sleeve, a threaded pin slidably mounted through the shaft seat, the outer wall of the threaded pin being threadedly mounted with the inner thread of the shaft sleeve, a gear ring rotatably mounted on the flange seat, and three circumferentially distributed pin holes on the gear ring;

[0009] The mold mechanism comprises a ring frame installed inside the flange seat, three fixing holes distributed circumferentially on the ring frame, a mold core integrally formed at the front end of the ring frame, and a mold frame fixed at the front end of the mold core.

[0010] Preferably, the mold mechanism also includes a plurality of mud holes distributed in a matrix inside the mold core, and a tapered hole is opened at the front end of the mud holes, and a plurality of limit columns distributed in a matrix are provided inside the mold frame, and an extrusion groove connected to the tapered hole is formed between two adjacent limit columns.

[0011] Preferably, the mounting mechanism further comprises a guide bar fixed on the inner wall of the shaft seat and a guide groove formed on the outer wall of the threaded pin.

[0012] Preferably, the mold base mechanism also includes a ring seat integrally formed with the outer wall of the flange seat, three circumferentially distributed shift racks hingedly installed at the rear end of the ring seat, three circumferentially distributed pin heads slidingly installed inside the ring seat, and the rear ends of the pin heads are hinged to the shift racks, the upper end of the shift rack has a fixed rounded corner, and a shift block is provided at the lower end of the shift rack.

[0013] Preferably, the distance between the axis of the shift rack and the end close to the rounded corner is greater than the distance between the axis of the shift rack and the end close to the shift block.

[0014] Preferably, the gear ring and the gear are meshed with each other, and the other end of the gear ring is in contact with the ring seat.

[0015] Beneficial Effects

[0016] The utility model provides an extrusion die for a honeycomb denitration catalyst. Compared with the prior art, it has the following beneficial effects:

[0017] (1) After the mold mechanism is installed on the mold base mechanism, the gear is driven to rotate by rotating the gear ring clockwise, and the gear drives the threaded pin to move toward the axis of the flange seat through the shaft sleeve, so that the threaded pin can be inserted into the fixing hole, thereby fixing the mold mechanism in the mold base mechanism; and the mold mechanism can be released by rotating the gear ring counterclockwise, so that it can be quickly disassembled and removed.

[0018] (2) By increasing the taper of the tapered hole, the pressure and shear force on the clay when it enters the mold are increased, which helps to make the clay more evenly distributed and more tightly filled in the mold; and by setting a chamfer that maintains a certain proportion to the thickness of the inner wall, stress concentration can be reduced and the overall compressive strength of the product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model;

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the structure of local A in the figure.

[0023] In the figure: 1. extrusion die; 11. die base mechanism; 111. flange seat; 112. fitting seat; 113. shaft seat; 114. ring seat; 115. shift rack; 116. pin head; 117. shift block; 118. fillet; 12. mounting mechanism; 121. bushing; 122. gear; 123. threaded pin; 124. gear ring; 125. pin hole; 126. guide strip; 127. guide groove; 13. die mechanism; 131. ring rack; 132. fixing hole; 133. die core; 134. die frame; 135. mud hole; 136. tapered hole; 137. limit column; 138. extrusion groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-4 The utility model provides a technical solution for an extrusion die of a honeycomb denitration catalyst: an extrusion die of a honeycomb denitration catalyst, comprising an extrusion die 1 and used for extruding and shaping the honeycomb denitration catalyst, the extrusion die 1 comprising:

[0026] The mold base mechanism 11 comprises an engaging seat 112 integrally formed at the front end of the flange base 111, and three shaft seats 113 integrally formed on the outer wall of the flange base 111 and distributed in a circumference;

[0027] The mounting mechanism 12 includes a shaft sleeve 121 rotatably mounted on the shaft seat 113, a gear 122 fixed to the outer wall of the shaft sleeve 121, a threaded pin 123 slidably installed inside the shaft seat 113, and the outer wall of the threaded pin 123 is threadedly mounted with the inner wall of the shaft sleeve 121, a gear ring 124 rotatably mounted on the flange seat 111, and three pin holes 125 distributed circumferentially on the gear ring 124;

[0028] The mold mechanism 13 includes a ring frame 131 installed inside the flange seat 111, three circumferentially distributed fixing holes 132 opened on the ring frame 131, a mold core 133 integrally formed at the front end of the ring frame 131, and a mold frame 134 fixed at the front end of the mold core 133.

[0029] In this embodiment, after the mold mechanism 13 is installed to the mold base mechanism 11, the gear 122 is driven to rotate by rotating the gear ring 124 clockwise, and the gear 122 drives the threaded pin 123 to move toward the axis of the flange seat 111 through the shaft sleeve 121, so that the threaded pin 123 can be inserted into the fixing hole 132, thereby fixing the mold mechanism 13 in the mold base mechanism 11; and, the mold mechanism 13 can be released by rotating the gear ring 124 counterclockwise, so that it can be quickly disassembled and removed.

[0030] Specifically, the mold mechanism 13 also includes a plurality of mud holes 135 distributed in a matrix inside the mold core 133, and a tapered hole 136 is opened at the front end of the mud hole 135, and a plurality of limit columns 137 distributed in a matrix are provided inside the mold frame 134, and an extrusion groove 138 connected to the tapered hole 136 is formed between two adjacent limit columns 137.

[0031] In this embodiment, by increasing the taper of the tapered hole 136, the pressure and shear force on the clay material when entering the mold are increased, which helps to make the clay material more evenly distributed and more tightly filled in the mold; and by setting a chamfer that maintains a certain proportion to the inner wall thickness, stress concentration can be reduced and the overall compressive strength of the product can be improved.

[0032] Specifically, the mounting mechanism 12 further includes a guide bar 126 fixed on the inner wall of the shaft seat 113 and a guide groove 127 formed on the outer wall of the threaded pin 123 .

[0033] In this embodiment, the threaded pin 123 can be slidably connected to the shaft seat 113 through the guide groove 127 and the guide strip 126 .

[0034] Specifically, the mold base mechanism 11 also includes a ring seat 114 integrally formed on the outer wall of the flange seat 111, three circumferentially distributed shifting frames 115 hingedly installed at the rear end of the ring seat 114, three circumferentially distributed pin heads 116 slidingly installed through the inside of the ring seat 114, and the rear ends of the pin heads 116 are hinged to the shifting frames 115, a rounded corner 118 is fixed at the upper end of the shifting frame 115, and a shifting block 117 is opened at the lower end of the shifting frame 115.

[0035] In this embodiment, by pushing the shift block 117 downward to drive the shift frame 115 to rotate to be level with the pin head 116, the shift frame 115 can drive the pin head 116 to shrink into the ring seat 114, thereby disengaging from the pin hole 125 and releasing the fixation of the gear ring 124, so that the gear ring 124 can be rotated.

[0036] Specifically, the distance between the axis of the shifting frame 115 and the end close to the fillet 118 is greater than the distance between the axis of the shifting frame 115 and the end close to the shifting block 117 .

[0037] In this embodiment, when the pin hole 125 on the gear ring 124 rotates to align with the pin head 116, the shifting block 117 is pushed upward to drive the shifting frame 115 to rotate perpendicular to the pin head 116, so that the shifting frame 115 can drive the pin head 116 to extend to the outer wall of the ring seat 114, thereby inserting the pin hole 125 and fixing the gear ring 124, thereby limiting the rotation of the gear ring 124.

[0038] Specifically, the gear ring 124 and the gear 122 are meshed with each other, and the other end of the gear ring 124 is in contact with the ring seat 114 .

[0039] In this embodiment, when the gear ring 124 rotates, each gear 122 can be driven to rotate synchronously.

[0040] The working principle and use process of the utility model are as follows: first, after the mold mechanism 13 is installed to the mold base mechanism 11, the gear 122 is driven to rotate by rotating the gear ring 124 clockwise, and the gear 122 drives the threaded pin 123 to move toward the axis of the flange seat 111 through the shaft sleeve 121, so that the threaded pin 123 can be inserted into the fixing hole 132, thereby fixing the mold mechanism 13; at this time, the pin hole 125 on the gear ring 124 rotates to align with the pin head 116, and the shifting block 117 is driven upward to drive the shifting frame 115 to rotate perpendicular to the pin head 116, so that the shifting frame 115 can drive the pin head 116 to extend to the outer wall of the ring seat 114, thereby inserting the pin hole 125 and fixing the gear ring 124, thereby limiting the rotation of the gear ring 124, and then firmly fixing the mold mechanism 13 in the mold base mechanism 11.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An extrusion die for a honeycomb denitration catalyst, characterized in that: The invention comprises an extrusion die (1) and is used for extruding and shaping a honeycomb denitration catalyst. The extrusion die (1) comprises: The mold base mechanism (11) comprises an engaging seat (112) integrally formed at the front end of the flange seat (111), and three circumferentially distributed shaft seats (113) integrally formed on the outer wall of the flange seat (111); The mounting mechanism (12) comprises a shaft sleeve (121) rotatably mounted on the shaft seat (113), a gear (122) fixed to the outer wall of the shaft sleeve (121), a threaded pin (123) slidably mounted passing through the interior of the shaft seat (113), the outer wall of the threaded pin (123) being threadedly mounted with the inner wall of the shaft sleeve (121), a gear ring (124) rotatably mounted on the flange seat (111), and three circumferentially distributed pin holes (125) formed on the gear ring (124); The mold mechanism (13) comprises a ring frame (131) installed inside the flange seat (111), three circumferentially distributed fixing holes (132) opened on the ring frame (131), a mold core (133) integrally formed at the front end of the ring frame (131), and a mold frame (134) fixed at the front end of the mold core (133).

2. The extrusion die of a honeycomb denitration catalyst according to claim 1, characterized in that: The mold mechanism (13) further comprises a plurality of mud holes (135) arranged in a matrix inside the mold core (133), and a tapered hole (136) is provided at the front end of each mud hole (135); a plurality of limiting columns (137) arranged in a matrix inside the mold frame (134), and an extrusion groove (138) connected to the tapered hole (136) is formed between two adjacent limiting columns (137).

3. The extrusion die of a honeycomb denitration catalyst according to claim 1, characterized in that: The mounting mechanism (12) further comprises a guide strip (126) fixed on the inner wall of the shaft seat (113) and a guide groove (127) provided on the outer wall of the threaded pin (123).

4. The extrusion die of a honeycomb denitration catalyst according to claim 1, characterized in that: The die base mechanism (11) further comprises a ring seat (114) integrally formed on the outer wall of the flange seat (111), three circumferentially distributed shifting frames (115) hingedly mounted at the rear end of the ring seat (114), three circumferentially distributed pin heads (116) slidingly mounted and penetrating the interior of the ring seat (114), the rear ends of the pin heads (116) being hingedly connected to the shifting frames (115), a rounded corner (118) fixed at the upper end of the shifting frames (115), and a shifting block (117) provided at the lower end of the shifting frames (115).

5. The extrusion die of a honeycomb denitration catalyst according to claim 4, characterized in that: The distance between the axis of the shifting frame (115) and the end close to the rounded corner (118) is greater than the distance between the axis of the shifting frame (115) and the end close to the shifting block (117).

6. The extrusion die of a honeycomb denitration catalyst according to claim 1, characterized in that: The gear ring (124) and the gear (122) are meshed with each other, and the other end of the gear ring (124) is in contact with the ring seat (114).

Images