Precise flow switch regulator

Abstract

The utility model is suitable for medical equipment technical field provides a kind of accurate flow switch regulator, including shell, the top of shell is provided with import pipe, bottom is provided with export pipe, the inside of shell is also rotationally provided with matching circular valve core, there is flow channel in the circular valve core, the import pipe and export pipe are communicated by the flow channel, the center position of circular valve core also has driving gear, the shell also has rotating wheel, the rotating wheel is engaged with the driving gear by reduction gear mechanism. Here the rotational speed of circular valve core is far less than rotating wheel, by reasonable design gear reduction ratio, can make rotating wheel turn half a circle or even a circle to complete shutdown control, to realize the accurate on-off control of flow.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, and in particular relates to a precision flow switch regulator. Background Technology

[0002] Flow switch regulators are devices used in the medical field to control the flow rate of various fluids (such as bodily fluids, pharmaceutical solutions, oxygen, etc.). The principle of flow regulation is basically to control the flow rate of the fluid by changing the cross-sectional area of ​​the flow channel. They are used in various scenarios in the medical field.

[0003] For example, in cranial drainage, conventional drainage tubes typically use a switch valve to control the drainage switch and flow rate. However, this type of switch valve for flow control is not very precise, and is particularly unsuitable for situations where high flow control is required. Utility Model Content

[0004] In view of the above problems, the purpose of this utility model is to provide a precise flow switch regulator, which aims to solve the above technical problems.

[0005] The present invention adopts the following technical solution:

[0006] A precision flow switch regulator includes a housing, an inlet pipe at the top of the housing and an outlet pipe at the bottom, and a matching circular valve core rotatably disposed inside the housing. The circular valve core has a flow channel that connects the inlet pipe and the outlet pipe. A drive gear is located at the center of the circular valve core. A rotating wheel is also located on the housing, and the rotating wheel meshes with the drive gear through a reduction gear mechanism.

[0007] Furthermore, the back of the housing has a protective shell, and the reduction gear mechanism is located inside the protective shell.

[0008] Furthermore, the reduction gear mechanism includes a small gear located at the center of the rotating wheel, and a double-layer gear rotatably disposed within the protective housing, wherein the lower layer of the double-layer gear meshes with the small gear, and the upper layer meshes with the drive gear.

[0009] Furthermore, the lower diameter of the double-layer gear is larger than the upper diameter and the pinion diameter, while the upper diameter is smaller than the diameter of the drive gear.

[0010] Furthermore, the rotating wheel is located on the front of the housing, and there is a rotating shaft at the center of the rotating wheel. The interior of the circular valve core also has an arc-shaped opening to avoid the rotating shaft. After the rotating shaft passes through the arc-shaped opening and the housing, a small gear is fixed thereon.

[0011] Furthermore, the flow channel includes an annular channel and an upper short channel and a lower short channel that are vertically connected to the annular channel.

[0012] The beneficial effects of this utility model are as follows: The core feature of this utility model structure is that the rotating wheel drives the circular valve core to rotate through the reduction gear mechanism. The circular valve core has a flow channel inside. The rotation speed of the circular valve core is much smaller than that of the rotating wheel. By reasonably designing the gear reduction ratio, the rotating wheel can complete the shut-off control after rotating half a turn or even a full turn, thus achieving precise on / off control of the flow. Attached Figure Description

[0013] Figure 1 This is a perspective view of the precision flow switch regulator provided in this embodiment of the utility model;

[0014] Figure 2 This is a top view of the precision flow switch regulator provided in this embodiment of the utility model;

[0015] Figure 3 A cross-section of a precision flow switch regulator Figure 1 ;

[0016] Figure 4 A cross-section of a precision flow switch regulator Figure 2 . Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0018] To illustrate the technical solution described in this utility model, specific embodiments are described below.

[0019] like Figure 1-4 As shown, the precision flow switch regulator provided in this embodiment includes a housing 1. The top of the housing 1 is provided with an inlet pipe 2 and the bottom is provided with an outlet pipe 3. A matching circular valve core 4 is also rotatably disposed inside the housing 1. The circular valve core 4 has a flow channel 5 inside, through which the inlet pipe 2 and the outlet pipe 3 are connected. There is also a drive gear 61 at the center of the circular valve core 4. There is also a rotating wheel 62 on the housing. The rotating wheel 62 meshes with the drive gear 61 through a reduction gear mechanism.

[0020] In this structure, the circular valve core can rotate within the housing, and its outer circumference is sealed to the inner wall of the housing. As shown in the diagram, a circular shaft passes through the housing and fixes the drive gear at the center of the circular valve core, allowing the valve core to rotate around this shaft.

[0021] The housing also has a rotating wheel, which meshes with the drive gear via a reduction gear mechanism. As shown in the figure, the back of the housing 1 has a protective shell 11, and the reduction gear mechanism is located inside the protective shell 11. The function of the reduction gear mechanism is to slow down the rotational speed of the rotating wheel; for example, when the rotating wheel rotates half a revolution, the circular valve core rotates 30 degrees.

[0022] As a specific structure of the aforementioned reduction gear mechanism, such as Figure 3 , 4 As shown, the reduction gear mechanism includes a small gear 63 located at the center of the rotating wheel 62, and a double-layer gear 64 rotatably disposed within the protective housing 11. The lower layer of the double-layer gear 64 meshes with the small gear 63, and the upper layer meshes with the drive gear 61. In this embodiment, the diameter of the lower layer of the double-layer gear 64 is larger than the diameter of the upper layer and the diameter of the small gear 63, while the diameter of the upper layer is smaller than the diameter of the drive gear 61. The rotating wheel sequentially drives the small gear, the double-layer gear, the drive gear, and the central valve core to rotate. There is a gear ratio between the small gear and the lower layer of the double-layer gear, and there is also a gear ratio between the upper layer of the double-layer gear and the drive gear. These two gear ratios allow for overall reduction ratio control.

[0023] like Figure 4 In the state shown, the flow switch regulator is fully open. During the rotation of the rotating wheel, the circular valve core rotates slowly. As illustrated, the flow channel 5 within the circular valve core includes an annular channel 51 and upper and lower short channels 52 and 53, which are connected vertically to the annular channel 51. The upper and lower short channels gradually intersect with the corresponding inlet or outlet pipes, thus slowly adjusting the connection opening and achieving precise flow adjustment. When the maximum position is reached, the upper and lower short channels are closed, thus completing the shut-off. Therefore, the rotational speed of the circular valve core is much smaller than that of the rotating wheel. By rationally designing the gear reduction ratio, the rotating wheel can complete half a turn or even a full turn before completing the shut-off control, thereby achieving precise flow switching control.

[0024] In this embodiment, the rotating wheel 62 is located on the front of the housing 1, and a rotating shaft 65 is located at the center of the rotating wheel 62. The interior of the circular valve core 4 also has an arc-shaped opening 41 to avoid the rotating shaft. After the rotating shaft passes through the arc-shaped opening 41 and the housing 1, a small gear 63 is fixed thereon. The characteristic of this structure is that the arc-shaped opening limits the rotation angle of the circular valve core. The length of the arc-shaped opening needs to be designed so that when the rotating shaft is located at both ends of the arc-shaped opening, it corresponds to the two states of fully open and fully closed, respectively. This design is also very ingenious.

[0025] In addition, the inlet and outlet pipes of this product are stepped, with the outer end being smaller and the inner end larger. The width of the bottom is the same as the width of the upper and lower short channels, which can increase the area for opening control and further improve the progress of switching control.

[0026] It should be noted that the flow switch regulating valve provided in this embodiment can be applied to various occasions that require precise flow control, including but not limited to cranial drainage.

[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precision flow switch regulator, characterized by, The device includes a housing, an inlet pipe at the top of the housing and an outlet pipe at the bottom. A matching circular valve core is rotatably mounted inside the housing. The circular valve core has a flow channel through which the inlet pipe and the outlet pipe are connected. A drive gear is located at the center of the circular valve core. A rotating wheel is also mounted on the housing. The rotating wheel meshes with the drive gear through a reduction gear mechanism.

2. The precision flow switch regulator of claim 1, wherein, The back of the housing has a protective shell, and the reduction gear mechanism is located inside the protective shell.

3. The precision flow switch regulator of claim 1, wherein, The reduction gear mechanism includes a small gear located at the center of the rotating wheel, and a double-layer gear rotatably disposed within the protective housing, wherein the lower layer of the double-layer gear meshes with the small gear, and the upper layer meshes with the drive gear.

4. The precision flow switch regulator of claim 3, wherein, The lower diameter of the double-layer gear is larger than the upper diameter and the pinion diameter, while the upper diameter is smaller than the diameter of the drive gear.

5. The precision flow switch regulator of claim 4, wherein, The rotating wheel is located on the front of the housing, and there is a rotating shaft at the center of the rotating wheel. The inside of the circular valve core also has an arc-shaped opening to avoid the rotating shaft. After the rotating shaft passes through the arc-shaped opening and the housing, a small gear is fixed thereon.

6. The precision flow switch regulator of claim 5, wherein, The flow channel includes an annular channel and an upper short channel and a lower short channel that are connected vertically to the annular channel.

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