A rotary cut valve stator and rotor alignment device and method

Abstract

The application discloses a kind of rotary cutting valve stator and rotor alignment device, including stepper motor, the outer surface of the upper end of the stepper motor is fixedly connected with valve body, the stepper motor is electrically connected with power supply, the outer surface of the upper end of the valve body is fixedly connected with stator, the lower end surface of the stator is equipped with rotor, pre-tightening assembly is mutually matched, and pre-tightening spring is acted on the rotor with pre-tightening force, so that it is more closely fitted with the contact surface of stator, effectively reduce the risk of liquid leakage, simultaneously under the action of separation component, so that the liquid in the liquid delivery groove does not contact with the lower end surface of rotor when rotating, so that the contact area of rotor and stator is dry, reduce the lubricating effect of liquid on rotor and stator, while reducing the corrosiveness of liquid on the contact area of rotor and stator, improve the service life of equipment, by alignment component, the position of rotor can be corrected, so that the liquid delivery groove is aligned with liquid outlet, reduce flow resistance.

Description

Technical Field

[0001] The invention relates to the field of rotary valve technology, specifically to a rotary valve stator and rotor alignment device and method. Background Technology

[0002] Currently, high-end instruments and testing equipment in fields such as environmental protection, medical care, and chemical analysis use rotary valves for the transfer and switching of liquids, which is beneficial for mechanized operations and also improves efficiency.

[0003] To improve the sealing between the rotor and stator, existing rotary valves add springs inside the valve. The elastic force generated by the springs increases the fit between the stator and rotor. However, as the liquid switches between different outlets, a certain amount of liquid remains between the rotor and stator. The presence of this liquid causes the sealing between the rotor and stator to gradually decrease. Simply using a spring for pre-tensioning is not enough to ensure the fit between the rotor and stator. Therefore, we propose a stator-rotor alignment device and method for rotary valves. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for aligning the stator and rotor of a rotary valve to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the invention provides the following technical solution: a stator and rotor alignment device and method for a rotary valve includes a stepper motor, a valve body fixedly connected to the upper outer surface of the stepper motor, the stepper motor being electrically connected to a power supply, a stator fixedly connected to the upper outer surface of the valve body, a rotor provided on the lower end face of the stator, a pre-tightening component for pressing the rotor provided inside the valve body at the lower end of the rotor, a separation component for reducing liquid surface contact between the rotor and the stator, and an alignment component for positioning the rotor between the rotor and the valve body.

[0006] Preferably, the preload assembly includes a preload spring, a second splined shaft fixedly connected to the upper end of the stepper motor, a guide rod provided at the upper end of the second splined shaft, a second splined groove provided at the corresponding position of the guide rod and the second splined shaft, and the second splined shaft is located inside the second splined shaft, a baffle provided on the annular outer surface of the guide rod, a first splined shaft fixedly connected to the upper end of the guide rod, a first splined groove provided on the outer surface of the lower end of the rotor, and the first splined shaft is located inside the first splined groove, and the preload spring is located between the rotor and the baffle and is sleeved on the outside of the guide rod.

[0007] Preferably, the baffle is an electromagnet, a neodymium magnet is fixedly connected inside the valve body, and a guide rod passes through the neodymium magnet, so that the baffle corresponds and matches the inner cavity of the valve body.

[0008] Preferably, an inlet is provided at the middle position of the upper end of the rotor, the rotor is designed as a frustum, and an outlet is provided on its annular outer surface. A separation tank is fixedly connected to the lower end of the outlet, and a delivery tank is provided at the upper end of the rotor. The delivery tank is designed as a U-shaped structure, and its opening corresponds to the inlet and the separation tank.

[0009] Preferably, the separation assembly includes a separation rod that passes through the rotor and is slidably connected to the rotor. The lower end of the separation rod is fixedly connected to the upper end of the baffle. A separation block is magnetically attracted to the upper end of the separation rod. The size of the separation block is consistent with that of the separation groove, and the annular outer surface of the separation block is magnetically attracted to the rotor. The upper end of the separation rod is magnetic, and its upper end is magnetically attracted to the lower end of the separation block. The magnetic force generated by the separation rod and the separation block is greater than the magnetic force generated by the separation block and the rotor.

[0010] Preferably, the alignment assembly includes a hydraulic plate, which is fixedly connected to the annular outer surface of the separation rod. A hydraulic cavity is opened inside the rotor at a position corresponding to the hydraulic rod. A pipe groove is opened at the lower end of the inner surface of the hydraulic cavity. A telescopic groove is opened on the annular outer surface of the rotor. The other end of the pipe groove is connected to the telescopic groove. A positioning plate is slidably connected inside the telescopic groove. A docking hole is opened on the inner wall of the valve body at a position corresponding to the positioning plate. The docking holes are aligned with the liquid outlet, and there are six sets of each hole. Liquid is filled between the lower end of the inner surface of the hydraulic cavity and the lower end of the hydraulic plate.

[0011] Preferably, a return spring is fixedly connected between the positioning plate and the telescopic groove.

[0012] Preferably, the baffle is first energized, generating a magnetic force that repels the neodymium magnet, thus compressing the pre-tension spring and increasing the rotor's contact with the stator. As the baffle moves upward, the separating rod drives the separating block to insert into the infusion tank and the separating tank. At this time, the hydraulic plate extracts the liquid from the pipe tank and the telescopic tank, pulls the positioning plate back into the telescopic tank, and disconnects the positioning plate from the docking hole. Then, the stepper motor is started to drive the rotor to rotate, so that the infusion tank is aligned with different outlets. Finally, the baffle is de-energized, and the separating rod drives the hydraulic plate downward through the pre-tension spring to compress the liquid inside the hydraulic chamber, so that the positioning plate is inserted into the docking hole, achieving rotor correction. The baffle is energized again, so that the separating rod pulls the separating block out of the separating tank.

[0013] The invention has at least the following beneficial effects:

[0014] With the cooperation of the pre-tightening components, the pre-tightening spring generates a pre-tightening force on the rotor, making it fit more tightly against the stator, effectively reducing the risk of leakage. At the same time, with the action of the separation component, the liquid inside the infusion tank will not come into contact with the lower end face of the rotor when the rotor rotates, keeping the contact area between the rotor and the stator dry, reducing the lubrication effect of the liquid on the rotor and stator, and reducing the corrosiveness of the liquid on the contact area between the rotor and the stator, thus improving the service life of the equipment. The alignment component can correct the position of the rotor, aligning the infusion tank with the outlet, reducing flow resistance. Attached Figure Description

[0015] Figure 1 A schematic diagram of the overall structure of the invention;

[0016] Figure 2 A schematic diagram of the cross-sectional structure of the valve body of the invention;

[0017] Figure 3 A schematic diagram of the structure of the stator for the invention;

[0018] Figure 4 An exploded structural diagram of the pre-tightening assembly for the invention;

[0019] Figure 5 A schematic diagram illustrating the combination of the separating component and the alignment component in the invention;

[0020] Figure 6 A schematic diagram of the structure of the invention's baffle when energized;

[0021] Figure 7 A schematic diagram of the rotor structure for the invention;

[0022] Figure 8 This is a schematic diagram of the structure of the invention's reset spring and positioning plate.

[0023] In the diagram: 1. Stepper motor; 2. Valve body; 3. Stator; 30. Liquid inlet; 31. Liquid outlet; 32. Separation tank; 4. Rotor; 40. Liquid delivery tank; 41. Spline groove one; 5. Separation assembly; 50. Separation block; 51. Separation rod; 6. Alignment assembly; 60. Pipe groove; 61. Telescopic groove; 62. Positioning plate; 63. Docking hole; 64. Hydraulic chamber; 65. Hydraulic plate; 66. Return spring; 7. Preload assembly; 70. Baffle; 71. Neodymium magnet; 72. Preload spring; 73. Guide rod; 74. Spline shaft one; 75. Spline groove two; 76. Spline shaft two. Detailed Implementation

[0024] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0025] Please see Figure 1-8 The invention provides a technical solution: Embodiment 1, a device and method for aligning the stator and rotor of a rotary valve includes a stepper motor 1, a valve body 2 fixedly connected to the upper outer surface of the stepper motor 1, the stepper motor 1 being electrically connected to a power supply, a stator 3 fixedly connected to the upper outer surface of the valve body 2, a rotor 4 provided on the lower end face of the stator 3, a pre-tightening component 7 for pressing the rotor 4 provided inside the valve body 2 at the lower end of the rotor 4, a separation component 5 for reducing liquid surface contact between the rotor 4 and the stator 3, and an alignment component 6 for positioning the rotor 4 between the rotor 4 and the valve body 2. The stepper motor 1 controls the rotation of the rotor 4, thereby changing the liquid flow path and achieving the purpose of liquid exchange. When the stepper motor 1 drives the rotor 4 to rotate, the pre-tightening component 7 pre-tightens the rotor 4, making its upper end fit tightly against the lower end of the stator 3 to prevent leakage. After rotation, the alignment component aligns the rotor 4 and the stator 3 to ensure that the internal flow resistance is constant.

[0026] The preload assembly 7 includes a preload spring 72. A second splined shaft 76 is fixedly connected to the upper end of the stepper motor 1. A guide rod 73 is provided at the upper end of the second splined shaft 76. A second splined groove 75 is formed on the guide rod 73 at a position corresponding to the second splined shaft 76, and the second splined shaft 76 is located inside the second splined shaft 76. A baffle is fixedly connected to the annular outer surface of the guide rod 73. A first splined shaft 74 is fixedly connected to the upper end of the guide rod 73. A first splined groove 41 is formed on the lower outer surface of the rotor 4, and the first splined shaft 74 is located inside the first splined groove 41. The preload spring 72 is located between the rotor 4 and the baffle 70, and is sleeved on the outside of the guide rod 73. The guide rod 73 and the stepper motor 1 are engaged and fixed by the second spline shaft 76 and the second spline groove 75, which facilitates disassembly during maintenance. The rotor 4 and the guide rod 73 are engaged by the first spline shaft 74 and the first spline groove 41. While facilitating disassembly and maintenance, this also provides the displacement required for the preload spring 72 during preload. The cooperation between the preload spring 72 and the baffle 70 generates elastic force to improve the fit between the rotor 4 and the stator 3.

[0027] Based on the above embodiments, in Embodiment 2, the baffle 70 is an electromagnet, and the baffle 70 is sleeved on the outer surface of the guide rod 73. A neodymium magnet 71 is fixedly connected inside the valve body 2, and the guide rod 73 passes through the neodymium magnet 71. The baffle 70 corresponds to and matches the inner cavity of the valve body 2. The baffle 70 is an electromagnet. Before the stepper motor 1 is powered on, the baffle 70 is powered on, so that it and the neodymium magnet 71 generate a repulsive force, which forces the stop rod sleeved on the guide rod 73 to move upward and compress the pre-tension spring 72, increasing the elastic force generated by the pre-tension spring 72 and further increasing the degree of contact between the rotor 4 and the stator 3.

[0028] The rotor 4 has an inlet 30 at the middle of its upper end. The rotor 4 has a frustum-shaped structure and an outlet 31 on its annular outer surface. There are six outlets 31 in total. A separation tank 32 is fixedly connected to the lower end of the outlet 31. The rotor 4 has a delivery tank 40 at its upper end. The delivery tank 40 has a U-shaped structure and its opening corresponds to the inlet 30 and the separation tank 32 to improve the fluidity of the liquid. The U-shaped delivery tank 40 works with the rotor 4 to deliver the liquid to the corresponding outlet 31 to complete the liquid exchange.

[0029] The separation assembly 5 includes a separation rod 51 that passes through and is slidably connected to the rotor 4. The lower end of the separation rod 51 is fixedly connected to the upper end of the baffle 70. A separation block 50 is magnetically attracted to the upper end of the separation rod 51. The size of the separation block 50 is the same as that of the separation tank 32, and the annular outer surface of the separation block 50 is magnetically attracted to the rotor 4. The upper end of the separation rod 51 is magnetic, and its upper end is magnetically attracted to the lower end of the separation block 50. The magnetic force generated by the separation rod 51 and the separation block 50 is greater than the magnetic force generated by the separation block 50 and the rotor 4. When the baffle 70 is energized, the separation rod 51 drives the separation block 50 to insert into the separation tank 32. At this time, the upper end of the separation block 50 is level with the upper end of the infusion tank 40 of the rotor 4, sealing the infusion tank 40. Then, the stepper motor 1 drives the rotor 4 to rotate to complete the fluid exchange. There are six sets of separation blocks 50, and each set is provided inside the separation tank 32. When the rotor 4 rotates, it drives the separation blocks 50 to rotate, thereby cutting off the separation blocks 50. The magnetic connection between the separator 50 and the separator 51 is established. After the rotor 4 has rotated, the separator 50 is magnetically connected to the upper end of the separator 51. At this time, the baffle 70 is de-energized, and the pre-tension spring 72 drives the baffle 70 and the separator 51 to reset. The magnetic force between the separator 51 and the separator 50 is greater than the magnetic force between the separator 50 and the rotor 4. At this time, the separator 51 pulls the separator 50 into the rotor 4, so that the infusion tank 40 and the outlet 31 are unobstructed. Through the above technical solution, the probability of the lower end face of the stator 3 contacting the liquid inside the infusion tank 40 can be reduced. When the rotor 4 rotates, the stator 3 cuts the separator 50 and leaves it inside. When the lower end face of the stator 3 encounters the infusion tank 40, it will contact the separator 51 inserted inside it and will not contact the liquid, thereby ensuring the fit between the stator 3 and the rotor 4. If the liquid being transported is weak acid or weak alkali, the contact between the liquid and the docking position can be reduced, and the service life can be improved.

[0030] Alignment component 6 includes a hydraulic plate 65, which is fixedly connected to the annular outer surface of the separating rod 51. A hydraulic cavity 64 is formed inside the rotor 4 at a position corresponding to the hydraulic rod. A pipe groove 60 is formed at the lower end of the inner surface of the hydraulic cavity 64. A telescopic groove 61 is formed on the annular outer surface of the rotor 4. The other end of the pipe groove 60 is connected to the telescopic groove 61. A positioning plate 62 is slidably connected inside the telescopic groove 61. A docking hole 63 is formed on the inner wall of the valve body 2 at a position corresponding to the positioning plate 62. The docking hole 63 is aligned with the liquid outlet 31. Liquid is filled between the lower end of the inner surface of the hydraulic cavity 64 and the lower end of the hydraulic plate 65. As the separating rod 51 moves upward, the hydraulic plate 65 moves upward inside the hydraulic cavity 64, drawing out the liquid from the pipe groove 60. This causes the positioning plate 62 to move along the telescopic groove 61 towards the hydraulic cavity 64, thus moving the positioning plate 62 out of the docking hole 63. The internal pull-out allows the rotor 4 to rotate. When the rotor 4 rotates to the designated position, the separating rod 51 moves downward, the hydraulic plate 65 compresses the internal liquid, and it enters the hydraulic chamber 64 through the pipe groove 60, squeezing the positioning plate 62. The positioning plate 62 has a conical structure design, which has the function of correcting the angle of the rotor 4 while inserting into the docking hole 63. When fully inserted, the alignment is confirmed. In use, the baffle 70 is often energized twice to prevent the rotor 4 from being misaligned and causing the separating block 50 to fail to dock with the separating rod 51. The first time, the positioning plate 62 is inserted into the docking hole 63 to confirm the position of the rotor 4 and align the separation groove 32 with the infusion tank 40. The second time, the separating block 50 is retrieved from the separation groove 32 through the separating rod 51. Through the above technical solution, the position of the rotor 4 and the stator 3 can be aligned, reducing the flow resistance of the liquid during transmission.

[0031] According to the above embodiments, in Embodiment 3, a return spring 66 is fixedly connected between the positioning plate 62 and the telescopic groove 61. The return spring 66 can increase the speed at which the positioning plate 62 resets.

[0032] First, the baffle 70 is energized, generating a magnetic force that repels the neodymium magnet 71, thereby compressing the pre-tension spring 72 and increasing the fit between the rotor 4 and the stator 3. As the baffle 70 moves upward, the separating rod 51 drives the separating block 50 to insert into the infusion tank 40 and the separating tank 32. At this time, the hydraulic plate 65 extracts the liquid from the tube trough 60 and the telescopic trough 61, pulls the positioning plate 62 back into the telescopic trough 61, and disconnects the positioning plate 62 from the docking hole 63. Then, the stepper motor 1 is started to drive the rotor 4 to rotate, so that the infusion tank 40 is aligned with different outlets 31. Finally, the baffle 70 is de-energized, and the separating rod 51, through the pre-tension spring 72, drives the hydraulic plate 65 to move downward, compressing the liquid inside the hydraulic chamber 64, so that the positioning plate 62 is inserted into the docking hole 63, thus correcting the rotor 4. The baffle 70 is energized again, so that the separating rod 51 pulls the separating block 50 out of the separating tank 32.

[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0034] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A kind of rotary cutting valve stator and rotor alignment device, including stepper motor (1), the outer surface of the upper end of the stepper motor (1) is fixedly connected with valve body (2), the stepper motor (1) is electrically connected with power supply, it is characterized by: The outer surface of the upper end of the valve body (2) is fixedly connected with a stator (3), the lower end surface of the stator (3) is provided with a rotor (4), the inside of the valve body (2) is provided with a pre-tightening assembly (7) below the rotor (4) for pressing the rotor (4), a separation assembly (5) is arranged between the rotor (4) and the stator (3) for reducing liquid surface contact, and an alignment assembly (6) is arranged between the rotor (4) and the valve body (2) for positioning the rotor (4). The upper end of the rotor (4) is provided with a liquid inlet (30) at the middle position, the rotor (4) is designed in a circular truncated cone shape, the annular outer surface of the rotor (4) is provided with a liquid outlet (31), the lower end of the liquid outlet (31) is fixedly connected with a separation groove (32), and the upper end of the rotor (4) is provided with a liquid conveying groove (40) which is designed in a U shape and opens to the liquid inlet (30) and the separation groove (32). The separation assembly (5) comprises a separation rod (51), the separation rod (51) penetrates through the rotor (4) and is in sliding connection with the rotor (4), the lower end of the separation rod (51) is fixedly connected with the upper end of a baffle (70), the upper end of the separation rod (51) is magnetically attracted with a separation block (50), the size of the separation block (50) is consistent with that of the separation groove (32), the annular outer surface of the separation block (50) is magnetically attracted with the rotor (4), the upper end of the separation rod (51) has magnetism and is magnetically attracted with the lower end of the separation block (50), and the magnetic force generated by the separation rod (51) and the separation block (50) is greater than the magnetic force generated by the separation block (50) and the rotor (4).

2. A rotary cut valve stator and rotor alignment device as described in claim 1, wherein: The pre-tightening assembly (7) comprises a pre-tightening spring (72), the upper end of the stepping motor (1) is fixedly connected with a spline shaft two (76), the upper end of the spline shaft two (76) is provided with a guide rod (73), the guide rod (73) is provided with a spline groove two (75) at the corresponding position of the spline shaft two (76), and the spline shaft two (76) is located inside the spline shaft two (76), the annular outer surface of the guide rod (73) is provided with a baffle, the upper end of the guide rod (73) is fixedly connected with a spline shaft one (74), the lower end of the rotor (4) is provided with a spline groove one (41) on the outer surface, and the spline shaft one (74) is located inside the spline groove one (41), and the pre-tightening spring (72) is located between the rotor (4) and the baffle (70) and is sleeved outside the guide rod (73).

3. A rotary cutting valve stator and rotor alignment device as defined in claim 2 wherein: The baffle (70) is an electromagnet, the inside of the valve body (2) is fixedly connected with a rubidium magnet (71), and the guide rod (73) penetrates through the rubidium magnet (71), and the baffle (70) is correspondingly matched with the inner cavity of the valve body (2).

4. A rotary cut valve stator and rotor alignment device as described in claim 1, wherein: The alignment assembly (6) comprises a hydraulic plate (65) fixedly connected to the annular outer surface of the separation rod (51), a hydraulic cavity (64) is formed in the corresponding position of the hydraulic rod inside the rotor (4), a pipe groove (60) is formed in the lower end of the inner surface of the hydraulic cavity (64), an expansion groove (61) is formed in the annular outer surface of the rotor (4), the other end of the pipe groove (60) is communicated with the expansion groove (61), a positioning plate (62) is slidably connected in the expansion groove (61), a butt joint hole (63) is formed in the corresponding position of the inner wall of the valve body (2) and the positioning plate (62), the butt joint hole (63) is aligned with the liquid outlet (31), and the number of the butt joint holes (63) is six, and the lower end of the inner surface of the hydraulic cavity (64) and the lower end of the hydraulic plate (65) are filled with liquid.

5. A rotary cut valve stator and rotor alignment device as claimed in claim 4 wherein: The positioning plate (62) and the expansion groove (61) are fixedly connected with a return spring (66).

6. The method of aligning a rotary cut valve stator and rotor alignment device of claim 1, wherein: First, the baffle (70) is powered on, the baffle (70) generates magnetic force and repels the rubidium magnet (71), thereby compressing the pre-tightening spring (72) and increasing the adhesion of the rotor (4) to the stator (3), while the baffle (70) moves upward, the separation rod (51) drives the separation block (50) to insert into the inside of the infusion groove (40) and the separation groove (32), at this time, the hydraulic plate (65) draws out the liquid in the pipe groove (60) and the expansion groove (61), and the positioning plate (62) is attracted back into the expansion groove, the positioning plate (62) and the butt joint hole (63) are disconnected, then the stepping motor (1) is started to drive the rotor (3) to rotate, so that the infusion groove (40) is aligned with different liquid outlets, finally, the baffle (7) is powered off, the separation rod drives the hydraulic plate (65) to move downward through the pre-tightening spring (72) to compress the liquid in the hydraulic cavity (64), so that the positioning plate (62) is inserted into the butt joint hole (63), the correction of the rotor (4) is realized, the baffle (71) is powered on again, and the separation rod (51) connects the separation block (50) out of the separation groove (32).

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