High-temperature-resistant water-cooled spiral blade

Abstract

The utility model provides a high temperature resistant water cooling spiral blade, including pipe shaft assembly, spiral blade, the pipe shaft assembly includes inner tube, outer tube, inner tube, outer tube are mutually connected and inner tube is partially length that stretches out outer tube, and one end of inner tube is located in the outer tube and is sealed, and the other end is open, the outer tube is sealed near the open end of inner tube, and the other end is open, spiral chamber is located in the spiral blade, and the hollow thread pipe is communicated between inner tube and spiral chamber, and the through -hole on outer tube is communicated between spiral chamber and outer tube, the utility model provides a high temperature resistant water cooling spiral blade, guarantees lasting cooling when material conveying is carried out under 1000 DEG C high temperature, prolongs the life of spiral blade.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature material conveying, and in particular to a high-temperature resistant water-cooled spiral blade. Background Technology

[0002] The slag discharge temperature below the incinerator reaches over 1000℃, which is difficult for ordinary screw conveyor equipment to withstand, causing the welded parts of the screw blades to detach, deform, or even melt at high temperatures. This reduces the service life of the equipment.

[0003] Patent application number "202111124724.3" entitled "A Cold Slag Conveying Device" mentions the conveying of slag with temperatures up to 600°C. This device employs a labyrinth baffle module arranged inside the spiral tube shaft, with water-cooled spiral coils arranged on the non-working surfaces of the spiral blades. Both ends of the water-cooled spiral coils are connected to the coolant inside the tube body. This device also achieves cooling of the spiral blades, but it has the following drawbacks: 1) The non-working surface of the blade is made by winding the coil along the entire length. The coil diameter is small and the contact area with the blade is very small. It does not completely cover the non-working surface of the blade, so the effect of cooling the blade by passing water through the coil is not ideal.

[0004] 2) The welding method used for the blades and the tube shaft means that, under high-temperature conditions, the weld at the blade and tube shaft is very prone to detachment if no cooling treatment is taken, leading to overall blade deformation. The circular cross-section of the coil welded onto the blade plane will form an angle, which will trap the hot material and accelerate blade deformation.

[0005] 3) The labyrinth partition module uses semi-circular partitions to divide the tube shaft into multiple chambers, forming a labyrinthine structure that is not a completely sealed chamber. The labyrinth partition module is welded as a whole and directly installed into the inner cavity of the spiral tube shaft. This indicates that gaps exist between the semi-circular partitions and the tube shaft for successful installation. Consequently, pressurized cooling water flows directly through these gaps throughout the entire tube shaft, failing to achieve sequential cooling of each chamber. Multiple semi-circular partitions hinder the filling of the chambers with cooling water, thus reducing the cooling effect and even slowing down the water flow, preventing heat from being carried away in a timely manner. Summary of the Invention

[0006] The technical problem to be solved by this utility model is to provide a high-temperature resistant water-cooled spiral blade that can ensure material conveying at a high temperature of 1000℃, prevent welded parts from falling off, and extend the life of the spiral blade.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: A high-temperature resistant water-cooled spiral blade includes a tube shaft assembly and a spiral blade. The tube shaft assembly includes an inner tube and an outer tube, which are nested together with the inner tube extending a certain length beyond the outer tube. One end of the inner tube inside the outer tube is sealed, and the other end is open. The end of the outer tube near the open end of the inner tube is sealed, and the other end is open. The spiral blade has a spiral chamber inside, and the inner tube and the spiral chamber are connected by a hollow threaded tube. The spiral chamber and the outer tube are connected by a through hole on the outer tube.

[0008] The open end of the inner tube serves as the liquid inlet, and the open end of the outer tube serves as the liquid outlet; or the open end of the outer tube serves as the liquid inlet, and the open end of the inner tube serves as the liquid outlet; the flow direction of the coolant is opposite to the material conveying direction.

[0009] The end of the inner tube furthest from the open end is sealed by welding an inner tube sealing plate; the end of the outer tube furthest from the open end is sealed by welding an outer tube sealing plate.

[0010] The helical blade includes a first helical blade and a second helical blade, and the outer edges of the first helical blade and the second helical blade are fixed with blade sealing plates along the helical trajectory.

[0011] The hollow threaded tube is threaded to the inner tube and the outer tube at both ends, respectively. One end of the hollow threaded tube is connected to the inner tube, and the other end is connected to the spiral chamber.

[0012] The connection between the hollow threaded pipe and the inner and outer pipes is sealed with sealant.

[0013] The axes of the hollow threaded pipe and the through hole remain perpendicular to each other on the side projection plane.

[0014] The hollow threaded pipe and through holes are in multiple sets and distributed along the length of the pipe shaft assembly.

[0015] This utility model provides a high-temperature resistant water-cooled spiral blade, which has the following technical advantages: 1) By using an inner tube, an outer tube, and a spiral blade with a spiral chamber, and utilizing hollow threaded tubes and through holes, the coolant flows sequentially through the inner tube, outer tube, and spiral chamber, ensuring that all parts of the device are in direct contact with the coolant, thus enhancing the cooling effect.

[0016] 2) By arranging multiple sets of hollow threaded pipes and through holes, the hollow threaded pipes not only strengthen and fix the inner pipe, but also allow the water flow to enter, merge, and disperse in multiple streams. This increases the water flow rate, and at the same time, the entire spiral blade and pipe shaft are quickly filled with coolant (water), achieving uniform heat dissipation and avoiding the problem of large temperature differences in different areas of the device caused by the coolant gradually heating from the inlet to the outlet. On the other hand, it also enhances heat transfer efficiency.

[0017] 3) The tube shaft assembly uses inner tube, outer tube and hollow threaded tube connection, which ensures the strength of the tube shaft and is suitable for use in long screw conveyors.

[0018] 4) Compared with the patent "A Cold Slag Conveying Equipment" with application number "202111124724.3", in this application, the spiral blades are hollow structures and the tube shaft assembly is a hollow structure, and they are connected to each other through multiple sets of hollow threaded tubes and through holes; not only is the flow rate fast, but the contact area with the coolant is also large, which can cool the hollow blades as a whole before flowing out through the tube shaft. First, it protects the weld between the blades and the tube shaft from falling off at high temperature, and second, it protects the entire blade surface from deformation at high temperature. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an external schematic diagram of the present invention.

[0020] Figure 2 This is a longitudinal sectional view of the present invention (cut along the axis of the hollow threaded pipe).

[0021] Figure 3 This is a longitudinal sectional view of the present invention (cut along the axis of the through hole).

[0022] Figure 4 This is a cross-sectional view of the present invention.

[0023] In the figure: tube shaft assembly 1, spiral blade 2, inner tube 1.1, outer tube 1.2, inner tube sealing plate 1.3, outer tube sealing plate 1.4, inner section 1.5, outer section 1.6, first spiral blade 2.1, second spiral blade 2.2, blade sealing plate 2.3, spiral chamber 2.4, hollow threaded tube 3, through hole 4, support plate 5, flow hole 5.1. Detailed Implementation

[0024] like Figure 1 As shown, a high-temperature resistant water-cooled spiral blade includes a tube shaft assembly 1 and a spiral blade 2.

[0025] like Figures 2-3 As shown, the tube shaft assembly 1 includes an inner tube 1.1 and an outer tube 1.2, both of which are hollow tubes. One end of the inner tube 1.1 extends beyond the outer tube 1.2, serving as the liquid inlet (denoted by a). The other end of the inner tube 1.1 is sealed by an inner tube sealing plate 1.3. One end of the outer tube 1.2 extends beyond the inner tube sealing plate 1.3 by a certain length, serving as the liquid outlet (denoted by b). The other end of the outer tube 1.2 is sealed by an outer tube sealing plate 1.4. Thus, an inner section 1.5 is formed within the inner tube 1.1, and an outer section 1.6 is formed between the inner tube 1.1 and the outer tube 1.2.

[0026] like Figures 2-3 As shown, the helical blade 2 includes a first helical blade 2.1 and a second helical blade 2.2. The outer edges of the first helical blade 2.1 and the second helical blade 2.2 are fixed with blade sealing plates 2.3 along the helical trajectory. The first helical blade 2.1, the second helical blade 2.2, the blade sealing plates 2.3 and the side wall of the outer tube 1.2 constitute a helical chamber 2.4.

[0027] The inner tube 1.1 is provided with a plurality of hollow threaded tubes 3 arranged at intervals along its length. One end of each hollow threaded tube 3 is threaded to the inner tube 1.1, and the other end of each hollow threaded tube 3 is threaded to the outer tube 1.2 and extends through the outer tube 1.2 into the spiral chamber 2.4.

[0028] Preferably, the hollow threaded pipe 3 is coated with sealant before assembly, which can achieve a seal after assembly, prevent water overflow, and also strengthen the fixation of the inner pipe.

[0029] The outer tube 1.2 has multiple through holes 4 spaced apart along its length, which connect the spiral chamber 2.4 and the outer section 1.6. The axes of the hollow threaded pipe 3 and the through hole 4 remain perpendicular to each other on the side projection plane.

[0030] Preferably, a support plate 5 is arranged between the liquid outlet end (represented by b) of the outer tube 1.2 and the inner tube 1.1, and the support plate 5 has a flow hole 5.1. The advantages of setting the support plate 5 are that it can fix the inner tube 1.1 on the one hand, and form a flow path for the coolant to flow out on the other hand.

[0031] Working principle and process: The coolant enters the inner section 1.5 from the inlet end (represented by a), passes through multiple sets of hollow threaded pipes 3 and enters the spiral chamber 2.4, then enters the outer section 1.6 through the through hole 4, and finally flows out through the flow hole 5.1.

Claims

1. A high-temperature resistant water-cooled spiral blade, characterized in that: The assembly includes a tube shaft assembly (1) and a spiral blade (2). The tube shaft assembly (1) includes an inner tube (1.1) and an outer tube (1.2). The inner tube (1.1) and the outer tube (1.2) are connected to each other, and the inner tube (1.1) extends a certain length outside the outer tube (1.2). One end of the inner tube (1.1) inside the outer tube (1.2) is sealed and the other end is open. The outer tube (1.2) near the open end of the inner tube (1.1) is sealed and the other end is open. The spiral blade (2) is provided with a spiral chamber (2.4). The inner tube (1.1) and the spiral chamber (2.4) are connected by a hollow threaded tube (3). The spiral chamber (2.4) and the outer tube (1.2) are connected by a through hole (4) on the outer tube (1.2).

2. The high-temperature resistant water-cooled spiral blade according to claim 1, characterized in that: The open end of the inner tube (1.1) serves as the liquid inlet, and the open end of the outer tube (1.2) serves as the liquid outlet; or the open end of the outer tube (1.2) serves as the liquid inlet, and the open end of the inner tube (1.1) serves as the liquid outlet; the flow direction of the coolant is opposite to the material conveying direction.

3. The high-temperature resistant water-cooled spiral blade according to claim 2, characterized in that: The end of the inner tube (1.1) away from the open end is sealed by welding with an inner tube sealing plate (1.3); the end of the outer tube (1.2) away from the open end is sealed by welding with an outer tube sealing plate (1.4).

4. The high-temperature resistant water-cooled spiral blade according to claim 1, characterized in that: The helical blade (2) includes a first helical blade (2.1) and a second helical blade (2.2). The outer edges of the first helical blade (2.1) and the second helical blade (2.2) are fixed with blade sealing plates (2.3) along the helical trajectory.

5. A high-temperature resistant water-cooled spiral blade according to claim 1, characterized in that: The hollow threaded tube (3) is threaded to the inner tube (1.1) and the outer tube (1.2) at both ends respectively. One end of the hollow threaded tube (3) is connected to the inner tube (1.1) and the other end is connected to the spiral chamber (2.4).

6. A high-temperature resistant water-cooled spiral blade according to claim 5, characterized in that: The connection between the hollow threaded tube (3) and the inner tube (1.1) and the outer tube (1.2) is sealed with sealant.

7. The high-temperature resistant water-cooled spiral blade according to claim 1, characterized in that: The axes of the hollow threaded tube (3) and the through hole (4) remain perpendicular to each other on the side projection plane.

8. A high-temperature resistant water-cooled spiral blade according to claim 7, characterized in that: The hollow threaded tube (3) and through hole (4) are multiple sets and distributed along the length of the tube shaft assembly (1).

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