Unloader

Abstract

The utility model discloses a discharger, which belongs to the technical field of papermaking pulping auxiliary equipment, and comprises a shell, a feed port is arranged at the top of the shell, a discharge port is arranged at the bottom of the shell, an impeller driven by a power device is rotatably mounted in the shell, the impeller comprises a transmission shaft connected with the power device, and the transmission shaft is connected with the power device. A hub is fixedly installed on the transmission shaft, a plurality of wheel plates are arranged on the hub in an annular array mode, a blade is detachably installed on each wheel plate through a fastener, the section of each blade is in a fan shape, each blade is provided with an arc-shaped top face, and arc-shaped transition faces are arranged on the two sides of each blade. And the arc-shaped transition surface extends to the arc-shaped top surface. The utility model solves the technical problem that the sealing performance of the impeller is poor, so that the cooking pressure is reduced and the cooking quality is influenced, and is widely applied to papermaking pulping.

Description

Technical Field

[0001] This utility model belongs to the technical field of papermaking and pulping auxiliary equipment, and in particular relates to a discharge device. Background Technology

[0002] Currently, in industries such as pulp and paper making and artificial board manufacturing, unloading devices are compact, well-sealed, and stable unloading equipment. Installed at the tail end of a continuous digester, they separate the digester's digestion zone from the discharge zone, allowing the continuous digester to discharge material smoothly and continuously while digesting. They have a simple structure, reliable safety performance, uniform and accurate unloading, small size, and long service life, and are suitable for unloading and conveying materials in various high and low pressure digesters. The unloading device mainly consists of three parts: a motor, a differential planetary reducer or a needle-and-silicon cycloidal reducer, and an unloading valve. The unloading part of the unloading valve is mainly an impeller. The rotation of the impeller achieves continuous unloading. However, the blades are usually plate-shaped, with a small contact area between the blade end face and the valve body, resulting in poor sealing performance. Currently, the normal operating pressure of the cooker is 4-5 atmospheres, while the outlet pressure of the unloading device is 1 atmosphere. After a period of use, the contact surface between the blade end face and the valve body of these plate-shaped blades wears down, creating gaps. This causes gas leakage inside the cooker, a drop in pressure inside the cooker, affecting the cooking quality, and leading to insufficient spray pressure and difficulty in unloading.

[0003] Therefore, in the field of papermaking and pulping auxiliary equipment technology, there is still a need for research and improvement of unloading devices. This is a research hotspot and focus in the current field of papermaking and pulping auxiliary equipment technology, and it is also the starting point for the completion of this utility model. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to provide a discharge device to solve the technical problem that poor impeller sealing performance leads to a drop in cooking pressure and affects cooking quality.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a discharge device, including a housing, a feed inlet at the top of the housing, a discharge outlet at the bottom of the housing, an impeller driven by a power device rotatably installed inside the housing, the impeller including a transmission shaft connected to the power device, a hub fixedly installed on the transmission shaft, a plurality of wheel plates arranged in a circular array on the hub, each wheel plate having a blade detachably installed by fasteners, the blade having a fan-shaped cross-section, the blade having an arc-shaped top surface, and arc-shaped transition surfaces on both sides of the blade, the arc-shaped transition surfaces extending to the arc-shaped top surface.

[0006] As an improvement, the fastener includes a screw rotatably mounted on the blade, a radially extending groove is provided on the wheel plate, the screw is slidably mounted in the groove, and a lock nut is threaded to one end of the screw near the wheel plate.

[0007] As a further improvement, the slide groove is provided with a countersunk groove on the side near the blade, and a compression spring is provided in the countersunk groove. One end of the compression spring abuts against the groove wall of the countersunk groove near the drive shaft, and the other end abuts against the screw.

[0008] As a further improvement, a guide slope is provided between the arc-shaped transition surface and the arc-shaped top surface.

[0009] After adopting the above technical solution, the beneficial effects of this utility model are:

[0010] The blades in this embodiment have a fan-shaped cross-section. Compared with traditional sheet-shaped blades, this increases the contact area between the blade end face and the inner wall of the shell, resulting in a better sealing effect. This eliminates gas leakage inside the cooker and avoids poor cooking quality due to insufficient pressure inside the cooker. Since both sides of the blades have arc-shaped transition surfaces, the material is easier to discharge, preventing material from accumulating on both sides of the blades, thereby improving unloading efficiency and unloading effect.

[0011] Because the wheel plate has radially extending grooves, the installation position of the blade on the wheel plate can be changed. When the blade end face is worn, the blade can be moved outward so that the blade end face abuts against the inner wall of the housing, thereby extending the service life of the blade and reducing the operating cost.

[0012] Because the countersunk groove is equipped with a compression spring, the blade end face is always in a close contact with the inner wall of the housing. After the blade end face wears, it can automatically seal, which further improves the sealing effect, reduces the number of downtime maintenance, and thus improves production efficiency.

[0013] Because a guide slope is provided between the arc-shaped transition surface and the arc-shaped top surface, it ensures that the blade can be smoothly introduced when it turns from the feed inlet position to the shell position, thus avoiding blade jamming. Attached Figure Description

[0014] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0016] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model;

[0017] Figure 2 yes Figure 1 A magnified structural diagram of AA in the middle;

[0018] Figure 3 yes Figure 2 A magnified structural diagram of BB;

[0019] Figure 4 This is a usage state diagram of an embodiment of this utility model;

[0020] In the diagram: 1. Shell, 101. Inlet, 102. Outlet, 2. Power unit, 3. Drive shaft, 4. Hub, 5. Wheel plate, 6. Blade, 601. Arc-shaped top surface, 602. Arc-shaped transition surface, 603. Guide slope, 7. Screw, 8. Locking nut, 9. Slide groove, 10. Countersunk groove, 11. Compression spring, 12. Cooker. Detailed Implementation

[0021] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] The terms used in this specification, such as "front," "back," "left," "right," "inner," "outer," and "middle," are merely for clarity of description and are not intended to limit the scope of implementation of this utility model. Any changes or adjustments to their relative relationships, without substantially altering the technical content, shall also be considered within the scope of implementation of this utility model.

[0023] like Figure 1As shown, this utility model provides a discharge device, including a housing 1. The top of the housing 1 is provided with a feed inlet 101, and the bottom of the housing 1 is provided with a discharge outlet 102. The feed inlet 101 and the discharge outlet 102 are positioned opposite each other. An impeller driven by a power device 2 is rotatably installed inside the housing 1. The power device 2 is usually a combination of a motor and a reducer. The impeller includes a drive shaft 3 connected to the power device 2. A hub 4 is fixedly installed on the drive shaft 3. Several wheel plates 5 are arranged in a circular array on the hub 4. Each wheel plate 5 is detachably mounted with a blade 6 by fasteners. The blade 6 has a fan-shaped cross-section and an arc-shaped top surface 601. Compared with traditional blades, the blade 6 increases the contact area between the end face of the blade 6 and the inner wall of the shell 1, resulting in a better sealing effect, reducing gas leakage in the cooker, and avoiding difficulties in unloading due to insufficient pressure in the cooker. Both sides of the blade 6 are provided with arc-shaped transition surfaces 602, which extend to the arc-shaped top surface 601, making it easier for materials to be discharged and preventing materials from accumulating on both sides of the blade 6, thereby improving unloading efficiency and unloading effect.

[0024] like Figure 2 and Figure 3 As shown, the fastener includes a screw 7 rotatably mounted on the blade 6. A radially extending groove 9 is provided on the wheel plate 5. The screw 7 is slidably mounted in the groove 9. The end of the screw 7 near the wheel plate 5 is threadedly connected to a locking nut 8, which can change the mounting position of the blade 6 on the wheel plate 5. When the end face of the blade 6 is worn, the blade 6 can be moved outward so that the end face of the blade 6 abuts against the inner wall of the housing 1, thereby extending the service life of the blade 6 and reducing the operating cost.

[0025] A countersunk groove 10 is provided on the side of the slide 9 near the blade 6. A compression spring 11 is provided in the countersunk groove 10. One end of the compression spring 11 abuts against the groove wall of the countersunk groove 10 near the drive shaft 3, and the other end abuts against the screw 7. At this time, the locking nut 8 needs to be adjusted to a suitable position so that the blade 6 can press against the wheel plate 5, and the blade 6 can also move horizontally under the force of the compression spring 11, so that the end face of the blade 6 is always in abutting state with the inner wall of the housing 1. After the end face of the blade 6 is worn, it can automatically seal, further improving the sealing effect, reducing the number of downtime maintenance, and thus improving production efficiency.

[0026] A guide slope 603 is provided between the arc transition surface 602 and the arc top surface 601. Those skilled in the art can design the length and inclination angle of the guide slope 603 according to the sliding distance of the screw 7 in the groove 9, so that when the screw 7 is at the farthest position from the drive shaft 3, the guide slope 603 is still at the inner wall position of the housing 1, ensuring that the blade 6 can be smoothly introduced when it moves from the feed port 101 position to the housing 1 position, and avoiding the blade 6 from getting stuck.

[0027] When using, such as Figure 4As shown, after the cooking process is completed, the impeller rotates counterclockwise under the drive of the power unit 2. The material enters between the blades 6 from the feed port 101 and is discharged from the discharge port 102 in sequence as the blades 6 rotate. Under the action of the compression spring 11, the end face of the blades 6 is always in a push-up state with the inner wall of the shell 1. After the end face of the blades 6 is worn, it can automatically seal. At the feed port 101 and the discharge port 102, the blades 6 will be pushed out by the compression spring 11, so that the diameter of the end face of the blades 6 is larger than the diameter of the inner wall of the shell 1. When the blades 6 rotate to the position of the shell 1, the guide slope 603 contacts the shell 1, guiding the blades 6 into the shell 1, avoiding the blades 6 from getting stuck, and realizing continuous uninterrupted unloading.

[0028] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A discharge device, comprising a housing, an inlet at the top of the housing, an outlet at the bottom of the housing, and an impeller rotatably mounted inside the housing and driven by a power device, characterized in that, The impeller includes a drive shaft connected to the power device. A hub is fixedly mounted on the drive shaft. Several wheel plates are arranged in a circular array on the hub. Each wheel plate is detachably mounted with a blade by fasteners. The blade has a fan-shaped cross-section and an arc-shaped top surface. Both sides of the blade are provided with arc-shaped transition surfaces, which extend to the arc-shaped top surface.

2. The unloader according to claim 1, characterized in that, The fastener includes a screw rotatably mounted on the blade, a radially extending groove is provided on the wheel plate, the screw is slidably mounted in the groove, and a lock nut is threaded to one end of the screw near the wheel plate.

3. The unloader according to claim 2, characterized in that, The slide groove has a countersunk groove on the side near the blade, and a compression spring is installed in the countersunk groove. One end of the compression spring abuts against the groove wall near the drive shaft, and the other end abuts against the screw.

4. The unloader according to claim 3, characterized in that, A guide slope is provided between the arc-shaped transition surface and the arc-shaped top surface.

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