Rectangular screw conveyor and method of use

Abstract

The application discloses a rectangular spiral conveyor and a use method, relates to the technical field of spiral conveying, and relates to a spiral conveyor which comprises a shell with a rectangular cross section, a spiral shaft is arranged in the shell through a bearing, left and right ends of the shell are respectively provided with a feeding port and a discharging port, opposite self-discharging side doors are arranged on the front and back sides of the left end of the shell, and the self-discharging side doors can be squeezed open by materials remaining in the shell when the spiral shaft is reversed. The self-discharging side door which can be automatically opened by being squeezed by materials is arranged at the feeding port, when the power supply of the spiral conveyor is connected reversely, the materials in the shell will be discharged by squeezing and opening the self-discharging side door, not only the blade damage can be avoided, but also the indication of the reverse connection of the power supply can be observed by the opening of the side door, so that the technical problem that the blade is easily damaged due to the reverse connection of the power supply after the movement of the existing spiral conveyor is effectively solved.

Description

Technical Field

[0001] This invention relates to the field of screw conveying technology, specifically to a rectangular screw conveyor and its usage method. Background Technology

[0002] A screw conveyor is a device that uses a motor to drive a screw shaft to rotate, and the screw blades to push materials to achieve the purpose of conveying. Due to its advantages such as simple structure, small cross-sectional area, good sealing performance, and ease of closed transportation, screw conveyors are widely used in the oil field, construction, chemical, metallurgical, and pharmaceutical industries.

[0003] Currently, there are many existing technologies involving screw conveyors. For example, patent document CN221274297U discloses a material transport device for geological drilling sites. This device uses a screw conveyor as its main component and can crush and transport materials deposited or adhered to the cylinder wall, thus improving the overall efficiency of the machine. However, careful analysis reveals that when the screw conveyor stops, untransported material remains inside its casing. Since the casing of the aforementioned screw conveyor has a circular structure, this makes it difficult to clean the material inside the casing.

[0004] It should also be noted that in industries such as oilfield drilling, production equipment often needs to be relocated frequently. The screw conveyor installed inside the equipment moves to different locations for use. However, the power phase sequence varies in different parts of the oilfield. When the screw conveyor is moved to a different location, the power connection may be reversed, causing the screw shaft to rotate in the opposite direction. Furthermore, because cleaning the screw installed inside the equipment is inconvenient, material often remains inside. When the screw shaft rotates in reverse, the material will move towards the feed inlet (away from the discharge outlet) and accumulate and compress the blades, causing blade damage and affecting normal production.

[0005] Therefore, it is necessary to develop a new technology to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to overcome the aforementioned problems in the prior art and to provide a rectangular screw conveyor and its usage method. This invention features a self-discharging side door at the inlet that automatically opens when squeezed by the material. When the power supply to the screw conveyor is reversed, the material inside the casing will be squeezed open by the self-discharging side door to discharge. This not only avoids damage to the blades but also allows for easy observation of the reversed power supply indicator through the opening of the side door. This effectively solves the technical problem that existing screw conveyors are prone to blade damage due to reversed power supply after movement.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A rectangular screw conveyor includes a housing with a rectangular cross-section. A screw shaft is installed inside the housing via bearings. The left and right ends of the housing are respectively provided with a feed inlet and a discharge outlet. The front and rear sides of the left end of the housing are provided with symmetrical self-discharging side doors. The self-discharging side doors can be squeezed open by the material remaining in the housing when the screw shaft reverses.

[0008] When the self-discharge side door is fully open, the total material conveying area is greater than 1.5 times the material conveying cross-sectional area inside the shell.

[0009] The self-discharging side door is rectangular, and the right end of the self-discharging side door is fixed to the housing by a pin and a torsion spring.

[0010] The spiral shaft is fixed with a reverse spiral blade and a continuous forward spiral blade, and the reverse spiral blade is located at the end near the discharge port.

[0011] The length of the feed inlet is greater than or equal to the pitch of two forward-rotating helical blades.

[0012] The length of the discharge port is greater than or equal to the pitch of a forward spiral blade.

[0013] The spacing between the forward spiral blades on the spiral shaft gradually increases from the inlet to the outlet.

[0014] The housing includes a detachable upper sealing plate and a lower sealing plate, with the inlet located on the upper sealing plate and the outlet located on the lower sealing plate.

[0015] The left and right ends of the housing are respectively provided with inlet support and outlet support, and the spiral shaft is installed in the housing through the inlet support and outlet support.

[0016] The housing is mounted on the base to form a skid-mounted structure.

[0017] A method of using a rectangular screw conveyor includes the following steps: After connecting the power supply, start the screw conveyor and observe the discharge side door and discharge port. If the material remaining in the casing is discharged through the discharge port, it indicates that the power phase sequence is correctly connected. If the material remaining in the casing is not discharged through the discharge port, and the discharge side door is opened by compression and discharged from the discharge side door, it indicates that the power phase sequence is reversed. Immediately shut down the screw conveyor and adjust the power phase sequence until the material is discharged from the discharge port or the discharge side door is closed.

[0018] By adopting the above technical solution, the beneficial technical effects of the present invention are: 1. Able to prevent damage to the spiral blades Because the spacing between the forward-facing spiral blades on the screw shaft gradually increases from the inlet to the outlet, and because symmetrical self-discharge side doors are located on the front and rear sides of the left end of the casing, and the total area of ​​the fully opened self-discharge side doors is greater than 1.5 times the material conveying cross-sectional area inside the screw, when the power supply is reversed, causing the screw shaft to reverse, the material will gather at the left end. At this time, the gathered material will push open the side doors on the front and rear sides of the left end of the casing, indicating that the blades are reversing while discharging the material without damaging the blades.

[0019] 2. Easy to clean residual material inside the screw conveyor This invention uses a rectangular shell, which facilitates the installation of the self-discharge side door and the cleaning of materials. In particular, after the screw conveyor is stopped or used for a long time, the materials inside the shell can be effectively cleaned by opening the upper and lower sealing plates. Compared with existing U-shaped or tubular screw conveyors, this makes cleaning the materials inside the shell simpler and more convenient.

[0020] 3. Easy to install and use This invention eliminates the need for frequent opening of the housing to check whether the screw rotation direction matches the marked direction after the screw conveyor is installed on the main equipment and the power is relocated and reinstalled. It is convenient to use.

[0021] 4. Timeliness and reliability of the opening of the self-discharge side door This invention fixes the right end of the self-discharging side door to the housing with a pin and a torsion spring. Compared with the structure that fixes the left, upper or lower end of the self-discharging side door to the housing with a pin and a torsion spring, this invention can squeeze and open the self-discharging side door more promptly and sensitively, ensuring the timeliness and reliability of the opening of the self-discharging side door.

[0022] 5. Easy to discharge viscous materials This invention improves the efficiency of screw conveyors for discharging viscous materials by setting reverse spiral blades near the discharge port and setting the length of the discharge port to be greater than or equal to the pitch of one forward spiral blade.

[0023] 6. Can increase the effective volume of upstream equipment This invention makes it easier to increase the effective volume of upstream equipment by setting the length of the feed inlet to be greater than or equal to the pitch of two forward spiral blades.

[0024] 7. Facilitates transshipment The present invention can make the screw conveyor easier to transport by mounting the housing on the base to form a skid-mounted structure. Attached Figure Description

[0025] Figure 1 This is the front view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a bottom view of the present invention; Figure 4 This is a cross-sectional schematic diagram of the present invention.

[0026] The markings in the diagram are: 1. Shell, 2. Spiral shaft, 3. Front side plate, 4. Rear side plate, 5. Upper sealing plate, 6. Lower sealing plate, 7. Inlet, 8. Outlet, 9. Self-discharging side door, 10. Forward spiral blade, 11. Reverse spiral blade, 12. Inlet support, 13. Outlet support. Detailed Implementation

[0027] Example 1 like Figure 1-4 As shown, this embodiment provides a rectangular screw conveyor, including a housing 1 with a rectangular cross-section. Wherein, The shell 1 is mainly composed of a front side plate 3, a rear side plate 4, a left end plate, a right end plate, an upper sealing plate 5, and a lower sealing plate 6, which are fixed together by fasteners such as bolts.

[0028] The left and right ends of the housing 1 are respectively provided with a feed inlet 7 and a discharge outlet 8, with the feed inlet 7 located on the upper sealing plate 5 and the discharge outlet 8 located on the lower sealing plate 6.

[0029] The left and right ends of the housing 1 are respectively provided with an inlet support 12 and an outlet support 13, which can be fixed to the left and right end plates by welding, bolting, or other methods. Bearings are fixed inside both the inlet support 12 and the outlet support 13, and a screw shaft 2 is installed inside the housing 1 via the inlet support 12, the outlet support 13, and the bearings. In actual use, the right end of the screw shaft 2 can extend out of the outlet support 13 and connect to the power motor.

[0030] Furthermore, a reverse spiral blade 11 and a continuous forward spiral blade 10 are fixed on the spiral shaft 2. The spacing of the forward spiral blades 10 gradually increases from the feed inlet 7 to the discharge outlet 8 on the spiral shaft 2, while the reverse spiral blade 11 is located at the end closer to the discharge outlet 8. The forward spiral blade 10 can output the material entering from the feed inlet 7 to the discharge outlet 8, while the reverse spiral blade 11 can prevent the material from squeezing the right end of the spiral shaft 2 while ensuring that the material is smoothly discharged from the discharge outlet 8, and at the same time facilitates the effective discharge of viscous materials.

[0031] The front and rear sides (front side plate 3 and rear side plate 4) of the left end of the housing 1 are provided with self-discharging side doors 9, and the self-discharging side doors 9 on the front and rear sides of the left end of the housing 1 are symmetrical. The number of self-discharging side doors 9 on the front and rear sides of the left end of the housing 1 can be one or two. The self-discharging side doors 9 are normally closed in the natural state. When the screw shaft 2 reverses, the self-discharging side doors 9 can be squeezed open by the material remaining in the housing 1.

[0032] In this embodiment, the upper sealing plate 5 and the lower sealing plate 6 are designed for easy disassembly. By opening the upper sealing plate 5 and the lower sealing plate 6, the inner wall of the housing 1, the spiral shaft 2, the spiral blades, etc. can be cleaned directly from top to bottom.

[0033] In this embodiment, the self-discharging side door 9 is rectangular, and its right end is fixed to the housing 1 by a pin and a torsion spring. By fixing the right end of the self-discharging side door 9 to the housing 1 by a pin and a torsion spring, this embodiment allows for more timely and sensitive compression and opening of the self-discharging side door 9 compared to structures that fix the left, upper, or lower end of the self-discharging side door 9 to the housing 1, thus ensuring the timeliness and reliability of the opening of the self-discharging side door 9.

[0034] Those skilled in the art will understand that the specific position of the self-discharging side door 9 is preferably such that when the spiral shaft 2 reverses, the collected material can squeeze and open the self-discharging side door 9 in time without damaging the forward spiral blades 10.

[0035] In this embodiment, even if the power phase sequence is reversed, causing the spiral shaft 2 to reverse, the material remaining in the housing 1 can still push open the self-discharge side doors 9 on the front and rear sides of the housing 1. This has the advantage of discharging the material without damaging the blades while indicating that the blades are reversing.

[0036] Example 2 like Figure 1-4 As shown, this embodiment provides a rectangular screw conveyor, including a housing 1 with a rectangular cross-section. Wherein, The shell 1 is mainly composed of a front side plate 3, a rear side plate 4, a left end plate, a right end plate, an upper sealing plate 5, and a lower sealing plate 6, which are fixed together by fasteners such as bolts.

[0037] The left and right ends of the housing 1 are respectively provided with a feed inlet 7 and a discharge outlet 8, with the feed inlet 7 located on the upper sealing plate 5 and the discharge outlet 8 located on the lower sealing plate 6.

[0038] The left and right ends of the housing 1 are respectively provided with an inlet support 12 and an outlet support 13, which can be fixed to the left and right end plates by welding, bolting, or other methods. Bearings are fixed inside both the inlet support 12 and the outlet support 13, and a screw shaft 2 is installed inside the housing 1 via the inlet support 12, the outlet support 13, and the bearings. In actual use, the right end of the screw shaft 2 can extend out of the outlet support 13 and connect to the power motor.

[0039] Furthermore, a reverse spiral blade 11 and a continuous forward spiral blade 10 are fixed on the spiral shaft 2. The spacing of the forward spiral blades 10 gradually increases from the feed inlet 7 to the discharge outlet 8 on the spiral shaft 2, while the reverse spiral blade 11 is located at the end closer to the discharge outlet 8. The forward spiral blade 10 can output the material entering from the feed inlet 7 to the discharge outlet 8, while the reverse spiral blade 11 can prevent the material from squeezing the right end of the spiral shaft 2 while ensuring that the material is smoothly discharged from the discharge outlet 8, and at the same time facilitates the effective discharge of viscous materials.

[0040] The front and rear sides (front side plate 3 and rear side plate 4) of the left end of the housing 1 are provided with self-discharging side doors 9, and the self-discharging side doors 9 on the front and rear sides of the left end of the housing 1 are symmetrical. The number of self-discharging side doors 9 on the front and rear sides of the left end of the housing 1 can be one or two. The self-discharging side doors 9 are normally closed in the natural state. When the screw shaft 2 reverses, the self-discharging side doors 9 can be squeezed open by the material remaining in the housing 1.

[0041] In this embodiment, the upper sealing plate 5 and the lower sealing plate 6 are designed for easy disassembly. By opening the upper sealing plate 5 and the lower sealing plate 6, the inner wall of the housing 1, the spiral shaft 2, the spiral blades, etc. can be cleaned directly from top to bottom.

[0042] In this embodiment, the self-discharging side door 9 is rectangular, and its right end is fixed to the housing 1 by a pin and a torsion spring. By fixing the right end of the self-discharging side door 9 to the housing 1 by a pin and a torsion spring, this embodiment allows for more timely and sensitive compression and opening of the self-discharging side door 9 compared to structures that fix the left, upper, or lower end of the self-discharging side door 9 to the housing 1, thus ensuring the timeliness and reliability of the opening of the self-discharging side door 9.

[0043] According to a preferred embodiment of this example, after the discharge side door 9 is fully opened, the total material conveying area is greater than 1.5 times the material conveying cross-sectional area inside the housing 1.

[0044] Example 3 like Figure 1-4 As shown, this embodiment provides a rectangular screw conveyor, including a housing 1 with a rectangular cross-section. Wherein, The shell 1 is mainly composed of a front side plate 3, a rear side plate 4, a left end plate, a right end plate, an upper sealing plate 5, and a lower sealing plate 6, which are fixed together by fasteners such as bolts.

[0045] The left and right ends of the housing 1 are respectively provided with a feed inlet 7 and a discharge outlet 8, with the feed inlet 7 located on the upper sealing plate 5 and the discharge outlet 8 located on the lower sealing plate 6.

[0046] The left and right ends of the housing 1 are respectively provided with an inlet support 12 and an outlet support 13, which can be fixed to the left and right end plates by welding, bolting, or other methods. Bearings are fixed inside both the inlet support 12 and the outlet support 13, and a screw shaft 2 is installed inside the housing 1 via the inlet support 12, the outlet support 13, and the bearings. In actual use, the right end of the screw shaft 2 can extend out of the outlet support 13 and connect to the power motor.

[0047] Furthermore, a reverse spiral blade 11 and a continuous forward spiral blade 10 are fixed on the spiral shaft 2. The spacing of the forward spiral blades 10 gradually increases from the feed inlet 7 to the discharge outlet 8 on the spiral shaft 2, while the reverse spiral blade 11 is located at the end closer to the discharge outlet 8. The forward spiral blade 10 can output the material entering from the feed inlet 7 to the discharge outlet 8, while the reverse spiral blade 11 can prevent the material from squeezing the right end of the spiral shaft 2 while ensuring that the material is smoothly discharged from the discharge outlet 8, and at the same time facilitates the effective discharge of viscous materials.

[0048] The front and rear sides (front side plate 3 and rear side plate 4) of the left end of the housing 1 are provided with self-discharging side doors 9, and the self-discharging side doors 9 on the front and rear sides of the left end of the housing 1 are symmetrical. The number of self-discharging side doors 9 on the front and rear sides of the left end of the housing 1 can be one or two. The self-discharging side doors 9 are normally closed in the natural state. When the screw shaft 2 reverses, the self-discharging side doors 9 can be squeezed open by the material remaining in the housing 1.

[0049] In this embodiment, the upper sealing plate 5 and the lower sealing plate 6 are designed for easy disassembly. By opening the upper sealing plate 5 and the lower sealing plate 6, the inner wall of the housing 1, the spiral shaft 2, the spiral blades, etc. can be cleaned directly from top to bottom.

[0050] In this embodiment, the self-discharging side door 9 is rectangular, and its right end is fixed to the housing 1 by a pin and a torsion spring. By fixing the right end of the self-discharging side door 9 to the housing 1 by a pin and a torsion spring, this embodiment allows for more timely and sensitive compression and opening of the self-discharging side door 9 compared to structures that fix the left, upper, or lower end of the self-discharging side door 9 to the housing 1, thus ensuring the timeliness and reliability of the opening of the self-discharging side door 9.

[0051] In this embodiment, after the discharge side door 9 is fully opened, the total material conveying area is greater than 1.5 times the material conveying cross-sectional area inside the housing 1.

[0052] According to another preferred embodiment of this example, the length of the feed inlet 7 is greater than or equal to the pitch of two forward spiral blades 10, and the length of the discharge outlet 8 is greater than or equal to the pitch of one forward spiral blade 10.

[0053] Example 4 Based on any of the above embodiments, this embodiment is provided with a base, and a skid-mounted structure is formed by mounting the housing 1 on the base to facilitate the transfer of the screw conveyor.

[0054] Example 5 Based on any of the embodiments in Examples 1-4, this embodiment provides a method for using a rectangular screw conveyor, which includes the following process: After connecting the power supply, start the screw conveyor. The power motor controls the screw shaft 2 to rotate. Then observe the self-discharge side door 9 and the discharge port 8. If the material remaining in the housing 1 is discharged through the discharge port 8, it indicates that the power phase sequence is connected correctly and the screw conveyor can be used normally. If the material remaining in the housing 1 is not discharged through the discharge port 8, and is discharged from the self-discharge side door 9 by squeezing, it indicates that the power phase sequence is reversed. Immediately shut down the screw conveyor and adjust the power phase sequence until the material is discharged from the discharge port 8 or the self-discharge side door 9 is closed.

[0055] As can be seen from the above usage process, when the screw conveyor is transferred to different working conditions, even if the power supply is reversed and the screw shaft 2 reverses, the material remaining in the housing 1 can push open the self-discharge side doors 9 on the front and rear sides of the housing 1. It has the advantage of discharging the material without damaging the blades while indicating the blades to reverse.

[0056] The above description is merely a specific embodiment of the present invention. Any feature disclosed in this specification may be replaced by other equivalent or similar features unless otherwise specified. All features or steps in the disclosed methods or processes may be combined in any way, except for mutually exclusive features and / or steps.

Claims

1. A rectangular screw conveyor, characterized in that: The shell (1) has a rectangular cross-section. A spiral shaft (2) is installed inside the shell (1) via a bearing. The left and right ends of the shell (1) are respectively provided with a feed inlet (7) and a discharge outlet (8). The front and rear sides of the left end of the shell (1) are provided with symmetrical self-discharging side doors (9). The self-discharging side doors (9) can be opened by the material remaining in the shell (1) when the spiral shaft (2) reverses.

2. A rectangular screw conveyor according to claim 1, characterized in that: When the self-discharge side door (9) is fully opened, the total material conveying area is greater than 1.5 times the material conveying cross-sectional area inside the shell (1).

3. A rectangular screw conveyor according to claim 1, characterized in that: The self-discharging side door (9) is rectangular, and the right end of the self-discharging side door (9) is fixed to the housing (1) by a pin and a torsion spring.

4. A rectangular screw conveyor according to claim 1, characterized in that: A reverse spiral blade (11) and a continuous forward spiral blade (10) are fixed on the spiral shaft (2), and the reverse spiral blade (11) is located at one end near the discharge port (8).

5. A rectangular screw conveyor according to claim 4, characterized in that: The length of the feed inlet (7) is greater than or equal to the pitch of the two forward spiral blades (10).

6. A rectangular screw conveyor according to claim 4, characterized in that: The length of the discharge port (8) is greater than or equal to the pitch of a forward spiral blade (10).

7. A rectangular screw conveyor according to claim 4, characterized in that: The spacing between the forward spiral blades (10) on the spiral shaft (2) gradually increases from the feed inlet (7) to the discharge outlet (8).

8. A rectangular screw conveyor according to claim 1, characterized in that: The housing (1) includes a detachable upper sealing plate (5) and a lower sealing plate (6), with a feed inlet (7) on the upper sealing plate (5) and a discharge outlet (8) on the lower sealing plate (6).

9. A rectangular screw conveyor according to claim 1, characterized in that: The left and right ends of the housing (1) are respectively provided with inlet support (12) and outlet support (13), and the spiral shaft (2) is installed in the housing (1) through the inlet support (12) and outlet support (13).

10. A rectangular screw conveyor according to claim 1, characterized in that: The housing (1) is mounted on the base to form a skid-mounted structure.

11. A method of using the rectangular screw conveyor according to any one of claims 1-10, characterized in that... The process includes the following steps: After power is turned on, start the screw conveyor and observe the discharge side door (9) and discharge port (8). If the material remaining in the shell (1) is discharged through the discharge port (8), it indicates that the power phase sequence is connected correctly. If the material remaining in the shell (1) is not discharged through the discharge port (8) and is discharged from the discharge side door (9) by squeezing, it indicates that the power phase sequence is reversed. Immediately turn off the screw conveyor and adjust the power phase sequence until the discharge port (8) discharges or the discharge side door (9) closes.

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