Screw pump special for straw

Abstract

The utility model discloses a screw pump special for straw. The screw pump comprises a pump body, a driving device and a feeding chamber. Wherein the pump body is provided with a feeding end and a discharging end, and the pump body comprises a stator and a rotor matched with the stator; the driving device comprises an output shaft and a driver connected with the output shaft and used for providing power; a middle shaft is arranged in the feeding chamber, two ends of the middle shaft are respectively connected with the output shaft and the rotor, the feeding chamber comprises a cylinder body and an end cover arranged at the end part of the cylinder body, the end cover is of an annular structure and is provided with an inner circumferential surface and an outer circumferential surface, and the inner circumferential surface is an inclined surface extending from the cylinder body to the stator. According to the screw pump special for straw, the inclined face is arranged on the inner circumferential wall of the end cover, the material accumulation condition is improved, the blocking problem can be avoided, and the screw pump runs more smoothly.

Description

Technical Field

[0001] This application relates to the technical field of screw pumps, and particularly to a special screw pump for straw. Background Art

[0002] The treatment of crop straw is an important matter in rural agriculture. With the development of modern agriculture, the self-composting of organic fertilizers by farmers has gradually withdrawn from agricultural production, and the treatment of this straw has become a difficult problem. If this straw is directly burned, a large amount of thick smoke and toxic gases will be generated. Therefore, in order to reduce pollution, the straw is now pulverized and recycled.

[0003] A screw pump is used to convey straw during the process of pulverizing and recycling straw. The existing screw pump includes a pump body, a feeding chamber, and a driving device connected in sequence. Among them, an end cover is provided between the pump body and the feeding chamber. During the operation of the screw pump, the straw will accumulate or even block at the connection position between the end cover and the pump body and / or the feeding chamber. Therefore, further improvement is needed. Utility Model Content

[0004] The utility model provides a special screw pump for straw, which solves the problem of straw accumulation or even blockage at the connection of the end cover.

[0005] The special screw pump for straw includes:

[0006] A pump body having a feed end and a discharge end, the pump body including a stator and a rotor cooperating with the stator;

[0007] A driving device including an output shaft and a driver connected to the output shaft for providing power;

[0008] A feeding chamber internally provided with an intermediate shaft having two ends respectively connected to the output shaft and the rotor. The feeding chamber includes a cylinder body and an end cover provided at the end of the cylinder body. The end cover is an annular structure having an inner circumferential surface and an outer circumferential surface, and the inner circumferential surface is an inclined surface extending from the cylinder body to the stator.

[0009] The following also provides several optional ways, but they are not additional limitations to the above overall solution. They are only further supplements or optimizations. On the premise of no technical or logical contradictions, each optional way can be combined with the above overall solution alone, or multiple optional ways can be combined with each other.

[0010] Optionally, the inner circumferential surface has a front end close to the feed end and a rear end opposite thereto in the axial direction of the stator, and the inner circumferential surface gradually contracts from the rear end to the front end to form the inclined surface.

[0011] Optionally, the inclination angle of the inclined surface is 20° - 30°.

[0012] Optionally, the cylinder body includes a first part and a second part that are detachably connected, wherein the first part is connected to the end cover.

[0013] Optionally, the rear end of the inner peripheral surface is butted against the inner wall of the first part.

[0014] Optionally, the end cover has a first positioning portion that cooperates with the stator and a second positioning portion that cooperates with the first part.

[0015] Optionally, a blade for cutting the straw is fixed to the outer periphery of the intermediate shaft, and the blade is located inside the first part.

[0016] Optionally, a maintenance opening is provided on the side wall of the first part.

[0017] Optionally, both ends of the intermediate shaft are respectively connected to the rotor and the driving device through universal joints.

[0018] Optionally, it includes a support seat provided at the discharge end of the pump body, and the support seat and the end cover are connected by a pull rod to clamp and fix the pump body.

[0019] In the special straw screw pump of the present application, by providing an inclined surface on the inner peripheral wall of the end cover, the situation of material accumulation is improved, the problem of blockage can be avoided, and the operation of the screw pump is made smoother. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of a special straw screw pump according to an embodiment provided by the present application;

[0021] Figure 2 is Figure 1 an enlarged view of part A in;

[0022] Figure 3 is Figure 1 a partial view of the intermediate shaft part in;

[0023] Figure 4 is Figure 3 a partial view of disassembling the first part in.

[0024] The reference numerals in the drawings are explained as follows:

[0025] 100, pump body; 110, feed end; 120, discharge end; 130, stator; 140, rotor; 150, support seat; 160, pull rod;

[0026] 200, driving device; 210, output shaft; 220, driver;

[0027] 300, Feeding chamber; 310, Intermediate shaft; 320, Cylinder body; 330, End cover; 331, Inner circumferential surface; 332, Outer circumferential surface; 333, Inclined surface; 334, First positioning portion; 335, Second positioning portion; 340, First part; 341, Blade; 342, Maintenance opening; 343, Cover plate; 350, Second part; 321, Inlet; 360, Universal joint. Detailed implementation manners

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0029] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or there may also be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific embodiments, and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0031] In this application, terms such as "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity or order of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0032] In this application, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a system, product or device comprising a series of units does not necessarily have to be limited to those units clearly listed, but may include other units not clearly listed or inherent to these products or devices.

[0033] See Figures 1 to 4, an embodiment of the present application provides a special screw pump for straw, which includes a pump body 100, a driving device 200, and a feeding chamber 300. The pump body 100 has a feed end 110 and a discharge end 120, and the pump body 100 includes a stator 130 and a rotor 140 that cooperates with the stator 130. The driving device 200 includes an output shaft 210 and a driver 220 (such as a motor shown in the figure) that is directly or indirectly connected to the output shaft 210 to provide power.

[0034] An intermediate shaft 310 with both ends connected to the output shaft 210 and the rotor 140 respectively is arranged inside the feeding chamber 300. The feeding chamber 300 includes a cylinder body 320 and an end cover 330 arranged at the end of the cylinder body 320. The end cover 330 is a ring structure, having an inner circumferential surface 331 and an outer circumferential surface 332. The inner circumferential surface 331 is an inclined surface 333 extending from the cylinder body 320 to the stator 130. The inclined surface 333 can not only guide the material (straw) into the feed end 110, but also reduce the gap between the port of the feed end 110 and the inner circumferential surface 331. Compared with the prior art, the accumulation of materials between the stator 130 and the end cover 330 is reduced, and the problem of blockage can be avoided.

[0035] In this embodiment, the stator 130 of the device has an axis that is coaxial with the circumferential direction of the output shaft 210.

[0036] Furthermore, the inner circumferential surface 331 has a front end close to the feed end 110 and a rear end opposite thereto in the axial direction of the stator 130. The inner circumferential surface 331 gradually contracts from the rear end to the front end to form an inclined surface 333 (that is, the inner diameter of the rear end is larger than that of the front end). In this embodiment, the angle of the inclined surface 333 (based on the axial direction of the stator 130) is 20° - 30°. Of course, the angle can be specifically selected adaptively according to requirements.

[0037] See Figure 1 , Figure 3 and Figure 4 , the cylinder body 320 includes a first part 340 and a second part 350 that are detachably connected, and the first part 340 is connected to the end cover 330. The feeding chamber 300 has an inlet for the material (such as straw) to enter and an outlet that cooperates with the feed end 110. The first part 340 has an outlet, and the second part 350 has an inlet 321. The detachable connection method can be, for example, bolt connection, etc.

[0038] In order to avoid the accumulation of materials at the connection position between the end cover 330 and the first part 340, the rear end of the inner circumferential surface 331 is butted against the inner wall of the first part 340. Of course, for the convenience of connection, the end cover 330 has a first positioning portion 334 that cooperates with the stator 130 and a second positioning portion 335 that cooperates with the first part 340.

[0039] Considering that the straw can be further cut during the straw conveying process, a blade 341 for cutting the straw is fixed to the outer periphery of the intermediate shaft 310. The blade 341 is located within the first part 340 and is disposed close to the stator 130. Of course, to ensure the cutting effect, a plurality of blades 341 can be arranged and are evenly arranged in the circumferential direction.

[0040] In one embodiment, both ends of the intermediate shaft 310 are respectively connected to the rotor 140 and the driving device 200 through universal joints 360. The universal joint 360 on the side close to the rotor 140 is located within the first part 340 so as to be replaced and repaired in a timely manner. Further, a maintenance opening 342 is formed in the side wall of the first part 340. A cover plate 343 fixed by screws is provided at the maintenance opening 342. When it is necessary to repair or replace the blade 341, only the screws need to be unscrewed and the cover plate 343 is removed, and then the repair can be carried out at the maintenance opening 342 without disassembling the pump body 100 and the feeding chamber 300, which improves the maintenance efficiency.

[0041] In one embodiment, the screw pump includes a support seat 150 provided at the discharge end 120 of the pump body 100. The support seat 150 and the end cover 330 are connected by a pull rod 160 to clamp and fix the pump body 100.

[0042] In the screw pump of the present application, by providing an inclined surface 333 on the inner peripheral wall of the end cover 330, the accumulation of materials is improved, the problem of blockage can be avoided, and the operation of the screw pump is made smoother.

[0043] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification. When the technical features in different embodiments are embodied in the same drawing, it can be regarded that the drawing also discloses the combination examples of the various embodiments involved at the same time.

[0044] The above-described embodiments only represent several implementation manners of the present application, and the description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several deformations and improvements can still be made, and these all belong to the protection scope of the present application.

Claims

1. Straw-specific screw pump, characterized in that: include: A pump body having a feed end and a discharge end, the pump body comprising a stator and a rotor matched with the stator; A driving device, comprising an output shaft and a driver connected to the output shaft for providing power; A feeding chamber is provided with an intermediate shaft whose two ends are respectively connected to the output shaft and the rotor. The feeding chamber includes a cylinder and an end cover arranged at the end of the cylinder. The end cover is an annular structure with an inner circumferential surface and an outer circumferential surface. The inner circumferential surface is an inclined surface extending from the cylinder to the stator.

2. The straw-specific screw pump according to claim 1, characterized in that: The inner circumferential surface has a front end close to the feed end and an opposite rear end in the axial direction of the stator, and the inner circumferential surface gradually shrinks from the rear end to the front end to form the inclined surface.

3. The straw-specific screw pump according to claim 2, characterized in that: The inclination angle of the inclined surface is 20° to 30°.

4. The straw-specific screw pump according to claim 2, characterized in that: The cylinder comprises a first part and a second part which are detachably connected, wherein the first part is connected to the end cap.

5. The straw-specific screw pump according to claim 4, characterized in that: The rear end of the inner peripheral surface is butted against the inner wall of the first part.

6. The straw-specific screw pump according to claim 5, characterized in that: The end cover has a first positioning portion matched with the stator and a second positioning portion matched with the first portion.

7. The straw-specific screw pump according to claim 4, characterized in that: A blade for cutting the straw is fixed on the outer periphery of the intermediate shaft, and the blade is located in the first part.

8. The straw-specific screw pump according to claim 4, characterized in that: An inspection opening is provided on the side wall of the first part.

9. The straw-specific screw pump according to claim 1, characterized in that: The two ends of the intermediate shaft are respectively connected to the rotor and the driving device through universal joints.

10. The straw-specific screw pump according to claim 1, characterized in that: It comprises a support seat arranged at the discharge end of the pump body, wherein the support seat and the end cover are connected by a pull rod to clamp and fix the pump body.

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