Shaft transmission device and liquid distribution valve with same

Abstract

The utility model relates to the technical field of transmission equipment, in particular to a shaft transmission device and a liquid distribution valve with the shaft transmission device, which comprise a transmission shaft and a driving part for driving the transmission shaft to rotate, and further comprise a first planetary gear set and a second planetary gear set which are arranged at the output end of the transmission shaft in parallel, each of the first planetary gear set and the second planetary gear set comprises a central sun gear, the number of teeth of each central sun gear is an even number, the working surface of each central sun gear is meshed with five planetary gears, and the number of teeth of each planetary gear is an odd number; a transmission gear ring meshed with the planetary gear is arranged on the outer side of the planetary gear, and the transmission gear ring can be directly or indirectly connected to a driven part, so that the driving part can drive the driven part to move stably.

Description

Technical Field

[0001] The present invention relates to the technical field of transmission equipment, and in particular to a shaft transmission device and a liquid distributing valve with the shaft transmission device. Background Art

[0002] Traditional liquid separation and purification equipment is generally used in liquid separation and purification systems. The traditional method is generally a fixed bed. Compared with the traditional fixed bed, the continuous moving bed separation system can achieve uninterrupted separation operation, avoiding the time waste of the fixed bed needing to be shut down for regeneration after adsorption saturation, greatly improving production efficiency. For large-scale industrial production, the advantages of the continuous moving bed are particularly obvious, which can meet the needs of high output and reduce production costs.

[0003] The continuous moving bed separation system generally includes five major components: a turntable, a valve core, a resin column, a peripheral feeding system and a control system. Among them, the valve core is the core component. For example, the Chinese utility model patent with document number CN218863365U discloses a fluid material processing and distribution device, which includes an upper support body, a lower support body, an upper valve body, a lower valve body, a seal and an expansion sealing mechanism. The upper valve body is an annular structure, and the upper valve body and the lower valve body are both arranged between the upper support body and the lower support body. The upper support body is relatively fixed to the upper valve body, and the lower support body is relatively fixed to the lower valve body. The upper support body and the upper valve body can rotate relative to the lower support body and the lower valve body. The valve body structure is compact as a whole, and its working principle is to drive the upper valve body to rotate relative to the lower valve body by an external drive device to achieve liquid distribution. In this valve body structure, the design of the drive device is extremely important. Its main requirements include: the drive device itself is subjected to uniform force during movement, can drive the driven valve body to move smoothly, has a long service life, and a compact structure. However, the drive assembly in the prior art generally adopts a gear mechanism (see CN217108332U), which is difficult to meet the above requirements. Summary of the Invention

[0004] In order to solve the above technical problems, the purpose of the present invention is to provide a shaft transmission device and a liquid dispensing valve with the shaft transmission device. The shaft transmission device solves the problem of uneven force on the transmission shaft in the shaft transmission device in the prior art, and has a compact structure and realizes stable and smooth driving of the driven parts.

[0005] In order to achieve the above technical effects, the present invention adopts the following technical solutions:

[0006] In a first aspect, the present invention provides a shaft transmission device, comprising a transmission shaft and a driving member for driving the transmission shaft to rotate, and further comprising:

[0007] A first planetary gear set and a second planetary gear set are arranged in parallel at the output end of the transmission shaft, and the first planetary gear set and the second planetary gear set both include a central sun gear, and the number of teeth of the central sun gear is an even number. Each working surface of the central sun gear is engaged with 5 planetary gears, and the number of teeth of each planetary gear is an odd number; the outer side of the planetary gear is provided with a transmission ring gear engaged with it, and the transmission ring gear can be directly or indirectly connected to the driven part, so that the driving part can drive the driven part to move stably.

[0008] Furthermore, the shaft rotating device also includes a reducer, and the driving member is connected to the transmission shaft through the reducer.

[0009] Furthermore, the input end of the reducer is connected to the driving member, the output end of the reducer is provided with a shaft sleeve, the input end of the transmission shaft is provided in the shaft sleeve and is key-connected to the reducer through 3 to 5 sets of flat keys.

[0010] Furthermore, the first planetary gear set and the second planetary gear set further include a fixed plate, and the planetary gears in the first planetary gear set and the second planetary gear set are both mounted on the fixed plate.

[0011] Furthermore, the fixed plate includes a plate body, a through hole is provided in the middle of the plate body for the transmission shaft to pass through, the plate body is provided with five mounting positions centered on the through hole, the five mounting positions are evenly distributed around the through hole, and the planetary gears are arranged on the mounting positions.

[0012] Furthermore, the central sun gear is key-connected to the transmission shaft.

[0013] In the second aspect, the utility model provides a liquid dispensing valve, which includes a first valve body, a second valve body and a driving device. The driving device is the shaft transmission device provided in the first aspect above. The shaft transmission device is directly or indirectly connected to the first valve body and is used to drive the first valve body to rotate relative to the second valve body.

[0014] Preferably, the first valve body is an upper valve body, and the second valve body is a lower valve body.

[0015] Furthermore, the liquid distribution valve is applied to a continuous moving bed separation device, and the continuous moving bed separation device includes five major components: a turntable, a valve core, a plurality of resin columns, a peripheral feeding system, and a control system.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The utility model provides a shaft transmission device that drives the transmission shaft to move through a driving member, and by arranging a first planetary gear set and a second planetary gear set on the transmission shaft, when the driving member moves, the first planetary gear set and the second planetary gear set are synchronously driven to move through the transmission shaft, so that the first planetary gear set and the second planetary gear set and the transmission ring gear rotate synchronously and drive the driven member to move. This structure allows the driven member to be evenly stressed, and at the same time, the transmission shaft is also evenly stressed, which can effectively extend the service life of the shaft transmission device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the overall structure of a shaft transmission device provided by one embodiment of the present invention;

[0019] Figure 2 An exploded view of a shaft transmission device provided by one embodiment of the present invention;

[0020] Figure 3 A partial enlarged view of position A of a shaft transmission device provided in one embodiment of the present invention;

[0021] The figures are marked as: 10, driving member, 20, reducer, 21, sleeve, 21, mounting groove, 211a, first keyway, 30, transmission shaft, 30a, second keyway, 31, flat key, 32, third embedding groove, 41, center sun gear, 411, planetary gear, 412, transmission ring gear, 50, fixing plate. DETAILED DESCRIPTION

[0022] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0023] Unless otherwise specified, in the present invention, if there are terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "x direction", "y direction", "z direction", etc., indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the orientation or positional relationship in the present invention are only used for illustrative purposes and cannot be understood as limiting this patent. For ordinary technicians in this field, they can understand the specific meanings of the above terms in conjunction with the drawings and according to specific circumstances. Example 1

[0024] See also Figure 1-2 This embodiment provides a shaft transmission device, which can achieve stable movement of the driven member 10, and in this process, the transmission shaft 30 is evenly stressed, which is beneficial to improving the service life of the entire shaft transmission device.

[0025] In this embodiment, the shaft transmission device includes a driving member 10, which is an electric driving member. The output end of the driving member 10 is connected to a reducer 20, and the output end of the reducer 20 is connected to a transmission shaft 30. Specifically, the output end of the reducer 20 is provided with a shaft sleeve 21, and the shaft sleeve 21 is provided with a mounting groove 21 inside. The inner wall of the mounting groove 21 is provided with a plurality of first key grooves 211a. The transmission shaft 30 is coaxially mounted in the shaft sleeve 21 and the outer wall of the transmission shaft 30 is provided with a second key groove 30a. The number of the first key grooves 211a and the number of the second key grooves 30a are both 5, and the positions of the first key grooves 211a and the second key grooves 30a correspond one to one. In order to realize the connection between the transmission shaft 30 and the reducer 20, a flat key 31 is provided between the first key groove 211a and the second key groove 30a, thereby realizing a stable, fast and reliable connection between the reducer 20 and the transmission shaft 30.

[0026] In this embodiment, in order to drive the driven part 10 to move stably, the output end of the transmission shaft 30 is provided with a first row of planetary gear sets and a second row of planetary gear sets in parallel. The first row of planetary gear sets and the second row of planetary gear sets both include a center sun gear 41. The number of teeth of the center sun gear 41 is an even number. The working surface of each of the center sun gears 41 is meshed with 5 planetary gears 411, and the number of teeth of each of the planetary gears 411 is an odd number. The outer side of the planetary gear 411 is provided with a transmission ring gear 412 meshed with it. The transmission ring gear 412 can be directly or indirectly connected to the driven part 10, thereby realizing the driving of the driven part 10. To facilitate the installation of the planetary gears 411, both the first and second rows of planetary gear sets include a fixed plate 50. The planetary gears 411 in each of the first and second rows of planetary gear sets are mounted on this fixed plate 50. Specifically, the fixed plate 50 includes a plate body with a through-hole defined in the center for the transmission shaft 30 to pass through. Five mounting locations are defined on the plate body, centered on the through-hole and evenly spaced around the through-hole. The planetary gears 411 are bolted to these locations. Furthermore, to facilitate the connection of the center sun gear 41 to the transmission shaft 30, a third beading groove 32 is defined on the transmission shaft 30, and a fourth beading groove (not shown) is defined on the inner wall of the center gear. These third and fourth beading grooves 32 and 33 are used to receive the flat key 31, thereby connecting the transmission shaft 30 to the center sun gear 41. Example 2

[0027] In continuous moving bed separation equipment, the resin column is required to rotate in a fixed direction (clockwise or counterclockwise) and pass through different feeding areas in order to realize the feeding, regeneration, water washing and other processes of the resin column, thereby achieving the purpose of continuous and uninterrupted separation and purification of the liquid. When the resin column rotates and the liquid is switched, the valve core is required to synchronously switch the pipes at the inlet and outlet positions of the resin tank, so as to achieve the purpose of synchronous switching of the resin column and the liquid.

[0028] To achieve the above objectives, the present utility model provides an application of a shaft transmission device, specifically, a valve core for liquid separation and purification equipment. The valve core comprises at least an upper valve body and a lower valve body, the upper valve body being an annular structure. The valve core is used in a continuous moving bed separation device, and liquid distribution is achieved through the relative movement of the upper and lower valve bodies. The upper and lower valve body structures can be designed with reference to Chinese utility model patent document number CN218863365U. Since the continuous moving bed separation device is prior art and its valve body design can refer to the prior art, the corresponding drawings are not provided here.

[0029] The above embodiments are intended only to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art will appreciate that the technical solutions of the present invention may be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention, and such modifications or equivalents shall be encompassed by the claims of the present invention. Any techniques, shapes, and structures not described in detail herein are well known.

Claims

1. A shaft transmission device, comprising a transmission shaft (30) and a driving member (10) for driving the transmission shaft (30) to rotate, characterized in that: Also includes: A first planetary gear set and a second planetary gear set are arranged in parallel at the output end of the transmission shaft (30), wherein the first planetary gear set and the second planetary gear set both include a central sun gear (41), the central sun gear (41) has an even number of teeth, and the working surface of each central sun gear (41) is meshed with five planetary gears (411), and the number of teeth of each planetary gear (411) is an odd number; and a transmission ring gear (412) meshed with the planetary gears (411) is provided on the outer side of the planetary gears (411).

2. A shaft transmission device according to claim 1, characterized in that: It also includes a speed reducer (20), through which the driving member (10) is connected to the transmission shaft (30) in a transmission manner.

3. A shaft transmission device according to claim 2, characterized in that: The input end of the reducer (20) is connected to the driving member (10), the output end of the reducer (20) is provided with a shaft sleeve (21), the input end of the transmission shaft (30) is provided in the shaft sleeve (21) and is key-connected to the reducer (20) through 3 to 5 sets of flat keys (31).

4. A shaft transmission device according to claim 1, characterized in that: The first planetary gear set and the second planetary gear set further include a fixed plate (50), and the planetary gears (411) in the first planetary gear set and the second planetary gear set are both mounted on the fixed plate (50).

5. A shaft transmission device according to claim 4, characterized in that: The fixing plate (50) comprises a plate body, a through hole is provided in the middle of the plate body for the transmission shaft (30) to pass through, the plate body is provided with five mounting positions centered on the through hole, the five mounting positions are evenly distributed around the through hole, and the planetary gears (411) are arranged on the mounting positions.

6. A shaft transmission device according to claim 1, characterized in that: The central sun gear (41) is key-connected to the transmission shaft (30).

7. A liquid dispensing valve, characterized in that: The liquid dispensing valve includes a first valve body, a second valve body and a driving device, wherein the driving device is the shaft transmission device according to any one of claims 1 to 6, and the shaft transmission device is directly or indirectly connected to the first valve body and is used to drive the first valve body to rotate relative to the second valve body.

8. A liquid dispensing valve according to claim 7, characterized in that: The liquid distribution valve is applied to a continuous moving bed separation device.

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