CN217558327U - Dissimilar metal wear-resistant alloy block for helical blade of screw conveyor - Google Patents
Dissimilar metal wear-resistant alloy block for helical blade of screw conveyor Download PDFInfo
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- CN217558327U CN217558327U CN202221382680.4U CN202221382680U CN217558327U CN 217558327 U CN217558327 U CN 217558327U CN 202221382680 U CN202221382680 U CN 202221382680U CN 217558327 U CN217558327 U CN 217558327U
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Abstract
The utility model provides a screw conveyer helical blade dissimilar metal wear-resisting alloy piece. The high-chromium alloy block is used for driving sand by a spiral blade of the spiral conveyor; the low-carbon steel block is arranged on a spiral blade of the spiral conveyor, the lower part of the low-carbon steel block is welded with the spiral blade of the spiral conveyor, and the upper part of the low-carbon steel block is fixedly connected with the high-chromium alloy block through a dovetail groove structure to form dovetail groove connection; one end of the stud is embedded in the low-carbon steel block, and the other end of the stud extends into the high-chromium alloy block to be fastened with the low-carbon steel block to form a first bolt pair connection; one end of the bolt is fixed in the high-chromium alloy block, and the other end of the bolt extends into the low-carbon steel block and is fixedly connected with the low-carbon steel block; forming a second bolt pair connection. The utility model adopts the stud to form the first bolt pair connection; the bolts form a second bolt pair connection; a dovetail groove is formed between the high-chromium alloy block and the low-carbon steel block to form a dovetail groove connecting structure; the weldability of the low-carbon steel block is ensured, and the connection stability with the high-chromium alloy block is improved. The wear-resistant alloy block is suitable for being used as a dissimilar metal wear-resistant alloy block.
Description
Technical Field
The utility model relates to a shield constructs the screw conveyer in machine field, especially relates to a screw conveyer helical blade dissimilar metal wear-resisting alloy piece.
Background
The spiral conveyer is the main equipment for earth pressure balance shield machine to discharge earth and build earth pressure balance, and is installed between the bottom of the shield machine front body and the segment erector, wherein the central line is raised from front to back by a certain angle. The screw conveyer is of a central shaft screw rod type structure, consists of three parts, namely a cylindrical shell, a central shaft type screw shaft and a screw blade, is suitable for conveying sandy soil, and has better soil pressure resistance. At present, most of earth pressure balance shield machines adopt the screw conveyor. When the screw conveyor works, the screw shaft and the screw blade which penetrate into the soil bin in the front body rotate under the driving of the hydraulic motor, and the residue soil in the soil bin is conveyed along the screw conveyor shell and lifted to a soil outlet to be discharged under the combined action of the screw shaft and the screw blade.
At present, a wear-resistant alloy block used on a screw conveyor is a screw conveyor blade welding product, the upper half part is made of wear-resistant high-chromium alloy, the lower half part is made of two dissimilar metals Q345B through casting, and a dissimilar metal casting link mode is generally completed through two times of pouring by using bolt connection. The dissimilar metal casting connection strength is not enough, the falling between two bodies is easily caused to influence the use efficiency, the improper alloy selection is easily caused to cause the non-wear-resistant condition, and the low digging efficiency of the screw machine is influenced.
Disclosure of Invention
In order to solve the problems in the prior art, the utility model provides a screw conveyer helical blade dissimilar metal wear-resisting alloy piece. The dissimilar metal wear-resistant alloy block is assembled together by arranging the dovetail groove between the high-chromium alloy block and the low-carbon steel block, so that the technical problem of the connection strength of the dissimilar metal wear-resistant alloy block is solved.
The utility model provides a scheme that technical problem adopted is:
the dissimilar metal wear-resistant alloy blocks of the helical blades of the screw conveyor comprise high-chromium alloy blocks, low-carbon steel blocks, studs and bolts;
the high-chromium alloy block is used for driving sand by a spiral blade of a spiral conveyor;
the low-carbon steel block is arranged on a spiral blade of the spiral conveyor, the lower part of the low-carbon steel block is welded with the spiral blade of the spiral conveyor, and the upper part of the low-carbon steel block is fixedly connected with the high-chromium alloy block through a dovetail groove structure to form dovetail groove connection;
one end of the stud is embedded in the low-carbon steel block, and the other end of the stud extends into the high-chromium alloy block to be fastened with the low-carbon steel block to form a first bolt pair connection;
one end of the bolt is fixed in the high-chromium alloy block, and the other end of the bolt extends into the low-carbon steel block and is fixedly connected with the low-carbon steel block; forming a second bolt pair connection.
In order to further solve the technical problem to be solved by the invention, in the high-chromium alloy block and the low-carbon steel block provided by the invention, the lower part of the high-chromium alloy block is provided with a dovetail protrusion, the upper part of the low-carbon steel block is provided with a dovetail groove, and the dovetail protrusion corresponds to the dovetail groove and is assembled to form a dovetail groove connecting structure.
Furthermore, the studs and the bolts are symmetrically arranged and arranged at the joint of the dovetail grooves.
The utility model has the advantages that the first bolt pair connection is formed by the double-screw bolt; the bolts form a second bolt pair connection; a dovetail groove is formed between the high-chromium alloy block and the low-carbon steel block to form a dovetail groove connecting structure; therefore, the weldability of the low-carbon steel block material is ensured, the connection stability with the wear-resistant alloy part is improved, and the service life of the dissimilar metal wear-resistant alloy block is prolonged. The wear-resistant alloy block is suitable for being used as a screw blade dissimilar metal wear-resistant alloy block of a screw conveyor.
Drawings
FIG. 1 is a front view of the present invention;
FIG. 2 isbase:Sub>A cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
fig. 4 is a top view of the present invention.
In the figure, 1, a high chromium alloy block, 11, a dovetail projection;
2. low carbon steel block, 21, dovetail groove;
3. a stud;
4. and (4) bolts.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in the figure, the dissimilar metal wear-resistant alloy blocks of the spiral blades of the spiral conveyor comprise a high-chromium alloy block 1, a low-carbon steel block 2, a stud 3 and a bolt 4;
the high-chromium alloy block 1 is used for a spiral blade of a spiral conveyor to dig sandy soil;
the low-carbon steel block 2 is arranged on a spiral blade of the spiral conveyor, the lower part of the low-carbon steel block is welded with the spiral blade of the spiral conveyor, and the upper part of the low-carbon steel block is fixedly connected with the high-chromium alloy block 1 through a dovetail groove structure to form dovetail groove connection;
one end of a stud 3 is embedded in the low-carbon steel block 2, and the other end of the stud extends into the high-chromium alloy block 1 to be fastened with the low-carbon steel block to form a first bolt pair connection;
one end of the bolt 4 is fixed in the high chromium alloy block 1, and the other end of the bolt extends into the low carbon steel block 2 and is fixedly connected with the low carbon steel block; forming a second bolt pair connection.
In order to guarantee the utility model discloses the stability of structure, 1 lower part of high chromium alloy piece is provided with forked tail arch 11, and 2 upper portions of low carbon steel piece are provided with forked tail recess 21, and forked tail arch 11 is corresponding with forked tail recess 21, and the assembly forms dovetail connection structure.
In order to further guarantee the utility model discloses the stability of structure, the forked tail arch 11 of high chromium alloy piece 1 is the cross form to the setting improves the wear resistance of the wear-resisting alloy piece of dissimilar metal at high chromium alloy piece 1 middle part.
In order to optimize the utility model discloses a structure, low carbon steel piece 2's forked tail recess 21 is the cross form, also sets up at low carbon steel piece 2, improves high chromium alloy piece 1 and low carbon steel piece 2's stability of being connected.
In order to optimize the structure of the utility model, the stud 3 and the bolt 4 are arranged symmetrically and are arranged at the dovetail joint.
As a conventional technical choice, the low-carbon steel block 2 is made of Q345B and has excellent welding performance with a helical blade of a helical conveyor.
The utility model discloses a working process:
the utility model is processed by a lost foam dissimilar metal casting method, and the lower low-carbon steel block 2 is welded with the screw machine blade by adopting Q345B material, thereby ensuring excellent welding performance; the upper part adopts the high-chromium alloy block 1 to improve the hardness and the wear resistance, so that the contact surface of the helical blade and the sand is more wear-resistant; when the first pouring is carried out, the stud 3 is embedded in the matrix of the low-carbon steel block 2 to form a first bolt pair connection; when the second pouring is carried out, the bolt 4 locks the high-chromium alloy block 1 and the low-carbon steel block 2 to form second bolt pair connection; a dovetail groove structure is assisted between the high-chromium alloy block 1 and the low-carbon steel block 2 to form a dovetail groove connecting structure, and the upper part and the lower part are firmly combined by the dovetail groove structure after the second pouring, so that the weldability of the material of the Q345B part is ensured, the connection stability with the wear-resistant alloy part is improved, the service life of the dissimilar metal wear-resistant alloy block is prolonged, and the digging efficiency of a screw conveyor is improved.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (6)
1. The screw conveyer helical blade dissimilar metal wear-resisting alloy block is characterized in that: the method comprises the following steps:
the high-chromium alloy block (1), the high-chromium alloy block (1) is used for a spiral blade of a spiral conveyor to dig sand;
the low-carbon steel block (2) is arranged on a spiral blade of the spiral conveyor, the lower part of the low-carbon steel block (2) is welded with the spiral blade of the spiral conveyor, and the upper part of the low-carbon steel block is fixedly connected with the high-chromium alloy block (1) through a dovetail groove structure to form dovetail groove connection;
one end of the stud (3) is embedded in the low-carbon steel block (2), and the other end of the stud (3) extends into the high-chromium alloy block (1) to be fastened with the high-chromium alloy block to form a first bolt pair connection; and
one end of the bolt (4) is fixed in the high-chromium alloy block (1), and the other end of the bolt (4) extends into the low-carbon steel block (2) and is fixedly connected with the low-carbon steel block; forming a second bolt pair connection.
2. The dissimilar metal wear-resistant alloy block for the helical blade of the screw conveyor according to claim 1, wherein:
the high-chromium alloy block (1) lower part is provided with forked tail arch (11), low carbon steel block (2) upper portion is provided with forked tail recess (21), forked tail arch (11) with forked tail recess (21) are corresponding, and the assembly forms dovetail groove connection structure.
3. The dissimilar metal wear-resistant alloy block for the spiral blade of the spiral conveyor according to claim 2, wherein:
the dovetail protrusions (11) of the high-chromium alloy block (1) are in a cross shape and are arranged in the middle of the high-chromium alloy block (1), so that the wear resistance of the dissimilar metal wear-resistant alloy block is improved.
4. The dissimilar metal wear-resistant alloy block for the spiral blade of the spiral conveyor according to claim 2, wherein:
the dovetail grooves (21) of the low-carbon steel block (2) are in a cross form and are also arranged on the low-carbon steel block (2), and the connection stability of the high-chromium alloy block (1) and the low-carbon steel block (2) is improved.
5. The dissimilar metal wear-resistant alloy block for the spiral blade of the spiral conveyor according to claim 1, wherein:
the studs (3) and the bolts (4) are symmetrically arranged and arranged at the joint of the dovetail grooves.
6. The dissimilar metal wear-resistant alloy block for the spiral blade of the spiral conveyor according to claim 1, wherein:
the low-carbon steel block (2) is made of Q345B.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221382680.4U CN217558327U (en) | 2022-06-06 | 2022-06-06 | Dissimilar metal wear-resistant alloy block for helical blade of screw conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221382680.4U CN217558327U (en) | 2022-06-06 | 2022-06-06 | Dissimilar metal wear-resistant alloy block for helical blade of screw conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217558327U true CN217558327U (en) | 2022-10-11 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221382680.4U Active CN217558327U (en) | 2022-06-06 | 2022-06-06 | Dissimilar metal wear-resistant alloy block for helical blade of screw conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217558327U (en) |
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2022
- 2022-06-06 CN CN202221382680.4U patent/CN217558327U/en active Active
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