A screw pump stator assembly platform

Abstract

The utility model provides a kind of screw pump stator assembly platform, it is related to screw pump assembly equipment technical field, specifically includes assembly station, the top of assembly station is fixedly installed with U block, the top of assembly station is slidably connected with sliding block, the top of U block is provided with hydraulic cylinder, the corresponding two sides of stator are all provided with T block, the output end of hydraulic cylinder is fixedly connected with one T block, another T block is fixedly connected with assembly station.The structure design of the present application by "clamper inserts T block inside and forms sliding connection", both realizes that toolless quick replacement of clamp, and it is convenient to be aimed at different diameter, the stator of appearance, only needs to slide and change the special fixture of corresponding specification, platform need not to replace complete stator fixed component to be adapted to multiple stator assembly, expand application scenario, while quick replacement process reduces platform downtime frequency, improves equipment effective operation length.

Description

Technical Field

[0001] This utility model relates to the technical field of screw pump assembly equipment, specifically a screw pump stator assembly platform. Background Technology

[0002] Screw pumps, with their unique advantages, are widely used in many industries such as petroleum, chemical, and food. As a typical representative of positive displacement rotary pumps, screw pumps rely on the volume change of the space between the meshing screws to transport liquids, and have significant characteristics such as stable flow rate, low pulsation, strong self-priming ability, low noise, high efficiency, and the ability to transport high-viscosity media. As the core component of a screw pump, the assembly quality of the stator directly affects the pump's performance and service life. The stator is usually composed of a rubber bushing and a metal shell, and its internal helical cavity cooperates with the rotor to form a sealed space.

[0003] Chinese Patent Announcement No. CN220660734U discloses a screw pump stator assembly device, which simplifies manual assembly operations, reduces labor intensity, and improves efficiency. The device includes a mobile trolley with a guide rail. A slidable slide is mounted on the guide rail, and a vertical plate is mounted on the slide. A stator clamp is mounted on the vertical plate. One end of the stator clamp is connected to a motor mounted on the slide. A drive belt is connected to the bottom of the slide, and the drive belt is connected to a pulley mounted on the guide rail. The pulley is connected to a drive wrench head via a transmission shaft.

[0004] In the existing technology, during the use of a screw pump stator assembly device, the stator fixture is directly installed on the vertical plate, and the connection between the vertical plate and the slide table, and between the slide table and the guide rail, is "installation-type" (non-modular replaceable structure). If it is necessary to adapt to stators of different specifications, the connecting parts between the vertical plate and the fixture must be disassembled first (such as unscrewing bolts, removing fixing clips, etc.), which requires tool operation and the replacement process is cumbersome. Therefore, we have made an improvement and proposed a screw pump stator assembly platform. Utility Model Content

[0005] The purpose of this utility model is to address the problem that the fixtures are not easily replaced in a current screw pump stator assembly device.

[0006] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0007] A screw pump stator assembly platform allows for easy replacement of stators of different diameters and shapes using specialized clamps via sliding, thus improving the aforementioned issues.

[0008] The application is as follows:

[0009] A screw pump stator assembly platform includes an assembly platform. A U-shaped block is fixedly installed on the top of the assembly platform. A rotor and a stator are arranged above the assembly platform. A slider is slidably connected to the top of the assembly platform. A hydraulic cylinder is arranged on the top of the U-shaped block. T-shaped blocks are arranged on corresponding sides of the stator. The output end of the hydraulic cylinder is fixedly connected to one of the T-shaped blocks. The other T-shaped block is fixedly connected to the assembly platform. A clamp is arranged on the side of the two T-shaped blocks that are close to each other. The clamp is inserted into the interior of the T-shaped block and slidably connected to it. Auxiliary structures are arranged on corresponding sides of the two T-shaped blocks.

[0010] As a preferred technical solution of this application, the auxiliary structure includes a pull plate. A plurality of insert rods and T-shaped rods are fixedly installed on the side of the pull plate near the clamp. The plurality of insert rods are inserted into the interior of the clamp and slidably connected thereto. The plurality of insert rods pass through one side of the T-shaped block and slidably connected thereto. The plurality of T-shaped rods are inserted into the interior of the T-shaped block and slidably connected thereto. Return springs are fixedly installed on both sides of the plurality of T-shaped blocks. The ends of two adjacent return springs that are far apart from each other are fixedly connected to the T-shaped blocks.

[0011] As a preferred technical solution of this application, rubber pads are fixedly installed on the sides of the two clamps that are close to each other;

[0012] As a preferred technical solution of this application, side plates are fixedly installed on both sides of the slider, and a fixed frame is rotatably connected to the top of the slider through a rotating shaft. A level is embedded in one side of the fixed frame, and the rotor is movably connected to the fixed frame. A first servo motor is embedded in one side of one of the side plates, and the output end of the first servo motor is fixedly connected to the rotating shaft.

[0013] As a preferred technical solution of this application, the assembly table is provided with a sliding structure inside. The sliding structure consists of a lead screw and a third servo motor. The lead screw passes through the slider and is threadedly connected to it. The third servo motor is fixedly installed inside the assembly table, and the output end of the third servo motor is fixedly connected to the lead screw. A fixing ring is provided on one side of the fixing frame. Two pressure sensors are embedded in the side of the fixing ring near the U-shaped block. An elastic pad is fixedly installed on the side of the fixing ring near the U-shaped block. Both pressure sensors pass through the elastic pad and are slidably connected to it.

[0014] As a preferred technical solution of this application, a controller is embedded on one side of the U-shaped block, and the controller is electrically connected to the hydraulic cylinder, the first servo motor, the level and the third servo motor.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] In the scheme of this application:

[0017] (1) Through the structural design of “inserting the clamp into the T-block and forming a sliding connection”, the clamp can be quickly replaced without tools. It is also convenient to replace the special clamp of the corresponding specification with a stator of different diameter and shape. The platform can adapt to various stator assemblies without replacing the entire set of stator fixing components, thus expanding the applicable scenarios. At the same time, the quick replacement process reduces the frequency of platform downtime and increases the effective working time of the equipment.

[0018] (2) By cooperating with the first servo motor and the level, precise angle adjustment can be achieved, expanding the industry application scenarios of the platform. In addition, for helical rotors and stators (such as single screw pumps), the second servo motor can achieve precise speed control. Combined with anti-slip pads, it can prevent rotor slippage and keep the helical tooth meshing deviation within the ideal range, solving the meshing misalignment problem caused by traditional manual rotation insertion and improving the efficiency of helical assembly. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0020] Figure 2 This is a front sectional view of the present invention.

[0021] Figure 3 This is a partial structural diagram of the present invention;

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

[0023] Explanation of reference numerals in the accompanying drawings: 1. Assembly table; 2. Side plate; 3. Slider; 4. Rotor; 5. U-shaped block; 6. Stator; 7. Hydraulic cylinder; 8. T-shaped block; 9. Fixture; 10. Pull plate; 11. Insert rod; 12. T-shaped rod; 13. Return spring; 14. Fixing frame; 15. First servo motor; 16. Fixing ring; 17. Pressure sensor; 18. Level; 19. Sliding structure; 20. Controller. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

[0026] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] Example 1: Please refer to the appendix of the instruction manual. Figure 1-3. A screw pump stator assembly platform includes an assembly platform 1. A U-shaped block 5 is fixedly installed on the top of the assembly platform 1. A rotor 4 and a stator 6 are arranged above the assembly platform 1. A slider 3 is slidably connected to the top of the assembly platform 1. A hydraulic cylinder 7 is arranged on the top of the U-shaped block 5. T-shaped blocks 8 are arranged on the corresponding sides of the stator 6. The output end of the hydraulic cylinder 7 is fixedly connected to one of the T-shaped blocks 8. The other T-shaped block 8 is fixedly connected to the assembly platform 1. A clamp 9 is arranged on the side of the two T-shaped blocks 8 that is close to each other. The clamp 9 is inserted into the interior of the T-shaped block 8 and slidably connected to it. Auxiliary structures are arranged on the corresponding sides of the two T-shaped blocks 8.

[0031] In this embodiment of the utility model, the operator first places the stator 6 to be assembled smoothly between two symmetrically distributed T-blocks 8 to ensure that the axis of the stator 6 is consistent with the direction of movement of the subsequent rotor 4. Then, the stator 6 clamping program is started through the touch screen of the controller 20. The controller 20 sends an action command to the hydraulic cylinder 7. The hydraulic rod of the hydraulic cylinder 7 slowly extends, pushing the upper T-block 8 to move vertically downward.

[0032] As the T-block 8 moves downward, the clamp 9 at its bottom gradually approaches the outer wall of the stator 6. The controller 20 receives the pressure signal fed back by the pressure sensor 17 built into the hydraulic cylinder 7 in real time. When the pressure value reaches the preset threshold, the controller 20 immediately sends a stop command to the hydraulic cylinder 7, and the hydraulic rod locks the current position to ensure that the clamp 9 forms a stable clamp on the stator 6, which avoids the stator 6 from shifting due to excessively loose clamping, and also prevents the stator 6 from being damaged due to excessively tight clamping.

[0033] After the stator 6 is fixed, the controller 20 switches to the rotor 4 drive mode. At this time, the slider 3 on the top of the assembly table 1 is in the initial standby position (away from the stator 6). After the operator installs the rotor 4 onto the fixing bracket 14 above the slider 3, the controller 20 sets the moving direction of the rotor 4 (towards the stator 6). The sliding groove at the bottom of the slider 3 and the guide rail on the top of the assembly table 1 are precisely matched to provide a guiding foundation for the smooth movement of the rotor 4 in the future, ensuring that the rotor 4 always moves closer to the axis of the stator 6.

[0034] In this embodiment of the invention, the hydraulic cylinder 7 automatically clamps the device, reducing the time from start to finish and significantly reducing the labor intensity of the operator.

[0035] Example 2: Please refer to the appendix of the instruction manual. Figure 1-4. In a preferred embodiment of this utility model, the auxiliary structure includes a pull plate 10. Several insert rods 11 and T-shaped rods 12 are fixedly installed on the side of the pull plate 10 near the clamp 9. Several insert rods 11 are inserted into the interior of the clamp 9 and slidably connected thereto. Several insert rods 11 pass through one side of the T-shaped block 8 and slidably connected thereto. Several T-shaped rods 12 are inserted into the interior of the T-shaped block 8 and slidably connected thereto. Several return springs 13 are fixedly installed on both sides of several T-shaped blocks 8. The ends of two adjacent return springs 13 that are far apart from each other are fixedly connected to the T-shaped block 8.

[0036] Rubber pads are fixedly installed on the sides of the two clamps 9 that are close to each other.

[0037] Side plates 2 are fixedly installed on both sides of the slider 3. The top of the slider 3 is rotatably connected to the fixed frame 14 via a rotating shaft. A level 18 is embedded in one side of the fixed frame 14. The rotor 4 is movably connected to the fixed frame 14. A first servo motor 15 is embedded in one side of one of the side plates 2, and the output end of the first servo motor 15 is fixedly connected to the rotating shaft. The fixed frame 14 is composed of a second servo motor and a mounting plate. The second servo motor is fixedly installed inside the fixed frame 14, and the output end of the second servo motor is fixedly connected to the mounting plate. The mounting plate is inserted into the fixed frame 14 and rotatably connected to it. The rotor 4 is inserted into the mounting plate and slidably connected to it. An anti-slip pad is provided inside the mounting plate. The controller 20 is electrically connected to the second servo motor.

[0038] The assembly platform 1 has a sliding structure 19 inside, which consists of a lead screw and a third servo motor. The lead screw passes through the slider 3 and is threadedly connected to it. The third servo motor is fixedly installed inside the assembly platform 1, and its output end is fixedly connected to the lead screw. A fixing ring 16 is provided on one side of the fixing frame 14. Two pressure sensors 17 are embedded in the side of the fixing ring 16 near the U-shaped block 5. An elastic pad is fixedly installed on the side of the fixing ring 16 near the U-shaped block 5. Both pressure sensors 17 pass through the elastic pad and are slidably connected to it. The fixing ring 16 is fixedly connected to the mounting plate.

[0039] A controller 20 is embedded on one side of the U-shaped block 5. The controller 20 is electrically connected to the hydraulic cylinder 7, the first servo motor 15, the level 18, and the third servo motor.

[0040] In this embodiment of the utility model, during the movement of the pull plate 10, the T-shaped rods 12 on both sides slide along the T-shaped groove of the T-shaped block 8, which strictly limits the movement trajectory of the pull plate 10, avoids the pull plate 10 from shifting left or right or tilting up or down, and ensures that the fine adjustment direction of the clamp 9 is always horizontal radial (perpendicular to the axis of the stator 6). At the same time, the operator only needs to pull the pull plate 10 to move the insertion rod 11 out of the clamp 9, release the fixing effect of the insertion rod 11 on the clamp 9, and then the clamp 9 can be taken out from the groove of the T-shaped block 8 to complete the disassembly and replacement process. The operation is convenient and efficient.

[0041] When the clamp 9 holds the stator 6, the rubber pad on the inside of the clamp 9 first contacts the outer wall of the stator 6. The flexible material of the rubber pad can prevent the metal clamp 9 from directly and rigidly colliding with the outer wall of the stator 6. Especially for stators 6 with anti-corrosion coating or rubber bushing on the surface, it can effectively prevent the coating from being scratched or the bushing from being squeezed and deformed.

[0042] In this embodiment of the invention, when assembling the inclined screw pump, the axis of the rotor 4 must be aligned with the inclined axis of the stator 6. The operator inputs a preset tilt angle into the controller 20. The controller 20 first receives the initial level signal from the level 18 on one side of the fixed frame 14 (the bubble in the center is the horizontal reference), and then sends a rotation command to the first servo motor 15. The first servo motor 15 drives the shaft to rotate at low speed, and the shaft drives the fixed frame 14 to tilt synchronously around the horizontal axis. The level 18 feeds back the tilt angle signal to the controller 20 in real time. When the feedback angle matches the preset angle, the controller 20 immediately controls the first servo motor 15 to stop and lock the shaft to ensure that the fixed frame 14 maintains a stable tilted posture. At this time, the axis of the rotor 4 is completely aligned with the axis of the inclined stator 6.

[0043] For helical rotors 4 and stators 6 (such as in a single screw pump), the helical engagement is achieved through the rotation of rotor 4. The operator sets the rotation speed and direction of rotor 4 on controller 20. Controller 20 sends a drive command to the second servo motor inside the mounting bracket 14. The second servo motor drives the mounting plate to rotate via a coupling. The arc-shaped groove on the top of the mounting plate fits tightly against rotor 4, and the anti-slip pad within the groove prevents relative sliding between rotor 4 and the mounting plate, ensuring that the mounting plate stably drives rotor 4 to rotate at the set speed and direction. During rotation, controller 20 monitors the output torque of the second servo motor in real time. If the torque exceeds the preset value, the rotation speed is automatically reduced to prevent damage to the rotor or stator 6 due to excessive friction.

[0044] After the rotor 4 angle adjustment or rotation preparation is completed, the controller 20 starts the slider 3 driver program and sends an action command to the third servo motor. The third servo motor reduces the speed through the reducer and drives the lead screw to rotate. The lead screw and the threaded hole at the bottom of the slider 3 form a precision thread transmission, which drives the slider 3 to move smoothly along the guide rail on the top of the assembly table 1.

[0045] During the insertion of rotor 4 into stator 6, the fixing ring 16 on one side of the fixing bracket 14 moves synchronously with rotor 4. When rotor 4 is inserted to 80% of the preset depth, the elastic pad on the side of fixing ring 16 closest to stator 6 first contacts the end face of stator 6. As rotor 4 continues to be inserted, the elastic pad is gradually compressed, and two symmetrically distributed pressure sensors 17 begin to contact the end face of stator 6 and detect axial pressure. The pressure sensors 17 transmit pressure signals to controller 20 in real time. If the pressure value does not exceed the preset threshold, slider 3 continues to move at the set speed until it is inserted into place. If the pressure value suddenly exceeds the threshold (e.g., foreign objects inside stator 6 cause rotor 4 to jam), controller 20 sends an emergency stop command, controls the third servo motor to stop rotating, and locks the position of slider 3 to prevent rotor 4 or stator 6 from deforming or being damaged due to excessive compression. In addition, the elastic pad can buffer the rigid contact between pressure sensor 17 and the end face of stator 6, avoiding damage to the sensor due to instantaneous impact force and extending the sensor's service life.

[0046] As the core control unit, the controller 20 collects signals from various components in real time through a dedicated data line. Based on the processed signals, the controller 20 sends precise control commands to each actuator: for the hydraulic cylinder 7, it adjusts the opening of the hydraulic valve according to the pressure signal to control the clamping pressure to remain stable within the preset range; for the first servo motor 15, it fine-tunes the motor rotation angle according to the angle deviation signal from the level 18 to ensure the tilt accuracy of the fixing frame 14; for the second servo motor, it adjusts the motor output speed and torque according to the rotation requirements of the rotor 4 to match the spiral engagement rhythm; for the third servo motor, it dynamically adjusts the moving speed by combining the moving position of the slider 3 with the pressure value of the pressure sensor 17, realizing an automated process of "low-speed guidance - high-speed propulsion - precise positioning". At the same time, the device is equipped with heat dissipation holes that cooperate with the motor.

[0047] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall fall within the scope of the technical solution of the present utility model.

Claims

1. A screw pump stator assembly platform, comprising an assembly table (1), characterized in that, A U-shaped block (5) is fixedly installed on the top of the assembly platform (1). A rotor (4) and a stator (6) are arranged above the assembly platform (1). A slider (3) is slidably connected to the top of the assembly platform (1). A hydraulic cylinder (7) is arranged on the top of the U-shaped block (5). T-shaped blocks (8) are arranged on the corresponding sides of the stator (6). The output end of the hydraulic cylinder (7) is fixedly connected to one of the T-shaped blocks (8). The other T-shaped block (8) is fixedly connected to the assembly platform (1). A clamp (9) is arranged on the side of the two T-shaped blocks (8) that are close to each other. The clamp (9) is inserted into the interior of the T-shaped block (8) and slidably connected to it. Auxiliary structures are arranged on the corresponding sides of the two T-shaped blocks (8).

2. The screw pump stator assembly platform according to claim 1, characterized in that, The auxiliary structure includes a pull plate (10). Several insert rods (11) and T-shaped rods (12) are fixedly installed on the side of the pull plate (10) near the clamp (9). Several insert rods (11) are inserted into the interior of the clamp (9) and slidably connected thereto. Several insert rods (11) pass through one side of the T-shaped block (8) and slidably connected thereto. Several T-shaped rods (12) are inserted into the interior of the T-shaped block (8) and slidably connected thereto. Several return springs (13) are fixedly installed on both sides of several T-shaped blocks (8). The ends of two adjacent return springs (13) that are far apart from each other are fixedly connected to the T-shaped block (8).

3. The screw pump stator assembly platform according to claim 1, characterized in that, Rubber pads are fixedly installed on the side of the two clamps (9) that are close to each other.

4. The screw pump stator assembly platform according to claim 1, characterized in that, Side plates (2) are fixedly installed on both sides of the slider (3). The top of the slider (3) is rotatably connected to a fixed frame (14) via a rotating shaft. A level (18) is embedded on one side of the fixed frame (14). The rotor (4) is movably connected to the fixed frame (14). A first servo motor (15) is embedded on one side of one of the side plates (2), and the output end of the first servo motor (15) is fixedly connected to the rotating shaft.

5. The screw pump stator assembly platform according to claim 4, characterized in that, The assembly platform (1) is provided with a sliding structure (19) inside. The sliding structure (19) consists of a lead screw and a third servo motor. The lead screw passes through the slider (3) and is threadedly connected to it. The third servo motor is fixedly installed inside the assembly platform (1), and the output end of the third servo motor is fixedly connected to the lead screw. A fixing ring (16) is provided on one side of the fixing frame (14). Two pressure sensors (17) are embedded on the side of the fixing ring (16) near the U-shaped block (5). An elastic pad is fixedly installed on the side of the fixing ring (16) near the U-shaped block (5). Both pressure sensors (17) pass through the elastic pad and are slidably connected to it.

6. The screw pump stator assembly platform according to claim 1, characterized in that, A controller (20) is embedded on one side of the U-shaped block (5), and the controller (20) is electrically connected to the hydraulic cylinder (7), the first servo motor (15), the level (18) and the third servo motor.

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