Device for automatically screening capillary tubes

Abstract

The utility model discloses a device for automatically screening capillary tubes. The device comprises a rack with a rotating shaft, the air cylinder fixing disc is installed on the rack and rotates around the rotating shaft, n air cylinders with telescopic shafts extending downwards are installed on the outer edge of the air cylinder fixing disc, detection heads are installed on the telescopic shafts, a synchronous wheel installed on the rotating shaft is arranged below the air cylinder fixing disc, the synchronous wheel is rotationally connected with a synchronous belt, and the synchronous belt is connected with the air cylinder fixing disc. A workpiece support used for installing a capillary workpiece is arranged on the synchronous belt, the detection head makes contact with the capillary workpiece to form an air flow channel when the telescopic shaft stretches out downwards, and the device further comprises a differential pressure sensor used for reading the air pressure difference of the two ends of the capillary workpiece. The device further comprises a gas conveying control part used for conveying gas to the detection head and the capillary tube workpiece and controlling the gas conveying to be turned off and turned on. According to the utility model, qualified capillary tubes can be identified more accurately and quickly, the efficiency is greatly improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automation, in particular to a device for automatically screening capillaries. Background Art

[0002] In the field of small flow gas detection, pressure sensors are often used as actuators. The next action is performed through changes in pressure. Therefore, a structure that produces a pressure difference is required. This pressure difference structure is the micropores in the gas path. In most cases, it can be replaced by a metal capillary cut to the required size.

[0003] However, when cutting metal capillaries, debris or rust on the cut surface is easy to occur. When cleaning rusty capillaries, rust particles will also be generated. These debris or rust particles can easily hinder or even block the inner hole of the capillary, thereby affecting the airflow passing through, resulting in inaccurate measured pressure difference, and further affecting the performance of the equipment using the pressure difference.

[0004] When screening out metal capillaries with qualified pressure difference, light is mainly used for observation with eyes. This method cannot screen out slightly blocked capillaries, and has low efficiency and requires a lot of manpower and time. Therefore, it is necessary to find an organization or prevention method that can automatically screen out capillaries that meet the requirements. Utility Model Content

[0005] In view of this, it is necessary to overcome at least one of the above-mentioned defects in the prior art. The utility model provides a device for automatically screening capillaries, comprising a frame with a rotating shaft; a cylinder fixed plate installed on the frame and rotating around the rotating shaft, a cylinder with n telescopic shafts extending downward is installed on the outer edge of the cylinder fixed plate, a detection head is installed on the telescopic shaft, a synchronous wheel installed on the rotating shaft is arranged below the cylinder fixed plate, the synchronous wheel and the synchronous belt are rotatably connected, a workpiece holder for mounting a capillary workpiece is arranged on the synchronous belt, the detection head contacts the capillary workpiece when the telescopic shaft extends downward to form an air flow channel, the device also includes a differential pressure sensor for reading the air pressure difference at both ends of the capillary workpiece, and the device also includes a gas delivery control component for delivering gas to the detection head and the capillary workpiece and controlling the gas delivery to be turned on and off.

[0006] According to the prior art described in the background technology of this patent, the prior art mainly uses light and eyes to observe when screening out metal capillaries with qualified pressure differences. This method cannot screen out slightly blocked capillaries, and is inefficient and requires a lot of manpower and time. The device for automatically screening capillaries disclosed in the utility model is based on the following basic principle: when gases of equal flow and pressure pass through micropores with equal cross-sections and constant lengths, the gas resistance remains unchanged and the pressure is constant, which can be measured by a differential pressure sensor. Therefore, gas with constant flow and pressure can be introduced into the metal capillary, and qualified metal tubes can be screened by measuring the pressure difference. According to the above principle, the technical solution of this case uses a power source to automatically input airflow into the capillary and detect the pressure difference at both ends. If the pressure difference meets the preset value, the capillary is judged to be qualified, otherwise, it is unqualified. In terms of mechanical structure, the detection head and the capillary are further matched one by one and cycle matched to realize automatic circulation, which further improves the overall efficiency and reduces production costs.

[0007] In addition, the device for automatically screening capillaries disclosed in the utility model also has the following additional technical features:

[0008] Furthermore, the cylinder and the workpiece holder correspond one-to-one in the working state, the cylinder fixed plate and the synchronous wheel are fixedly connected to the rotating shaft, and the workpiece holder on the synchronous belt corresponds one-to-one with the cylinder on the cylinder fixed plate during the rotation of the synchronous wheel, and the detection head and the capillary are in a coaxial state to ensure the identity of the airflow input, making the measurement structure more accurate.

[0009] Furthermore, the cylinders are evenly distributed along the outer edge of the cylinder fixing plate, the workpiece holders installed on the synchronous belt are evenly distributed, the distance between the cylinders is equal to the distance between the workpiece holders, and the detection head installed on the cylinder and the capillary workpiece installed on the workpiece holder are coaxial and evenly distributed in the working state, which can make the design of the cylinder and the workpiece holder on the outer edge of the cylinder fixing plate and the synchronous belt more convenient, and at the same time more stable in the working state.

[0010] Furthermore, a pressure plate is provided under the synchronous wheel, and the synchronous wheel, the cylinder fixed plate and the pressure plate are all fixedly connected to the rotating shaft. The pressure plate can ensure that the workpiece to be tested moves synchronously with the cylinder and is relatively still; and it supports the cylinder when pressing the workpiece.

[0011] Furthermore, a support plate is installed below the workpiece support.

[0012] Furthermore, the support plate is divided into two pieces, which are respectively located below the synchronous belt on both sides of the synchronous wheel. The support plate is divided into two pieces, which is more conducive to standardization and also saves costs.

[0013] Furthermore, a flipping mechanism including a flipping motor and a flipping structure is provided on the support plate, and the flipping mechanism is located below the preset workpiece support. The flipping mechanism is used to screen out unqualified capillaries. After determining the position of the unqualified capillaries on the synchronous belt, when the unqualified capillaries follow the synchronous belt to the flipping mechanism, the flipping mechanism receives an instruction to flip the plate, and the capillaries fall from here, thereby realizing the screening process of the capillaries.

[0014] Furthermore, the device also includes a workpiece sensor for detecting whether the capillary workpiece exists on the workpiece holder, and a cylinder sensor for driving the cylinder. During the operation of the device, it is necessary to detect whether there is a capillary workpiece on the workpiece holder. If not, the corresponding cylinder does not move. If so, the corresponding cylinder extends a telescopic rod downward, and the detection head and the capillary workpiece are pressed tightly to detect the pressure difference at both ends of the input airflow, thereby determining whether the capillary is qualified.

[0015] Furthermore, the pressure plate is provided with a flow channel for discharging the airflow input from above the capillary workpiece. After the capillary workpiece enters the pressure plate, the end of the capillary workpiece is located on the flow channel, the cylinder fixed plate, the synchronous wheel and the synchronous belt operate synchronously, the detection head and the upper end of the capillary workpiece are pressed tightly, the airflow is input to the capillary workpiece through the detection head, the airflow flows out through the end of the capillary workpiece, and the differential pressure sensor performs differential pressure detection to determine whether the capillary workpiece is qualified or not. The differential pressure sensor is placed in the bypass of the air intake path of the cylinder.

[0016] Furthermore, the size of the flow channel is smaller than the outer diameter of the capillary workpiece, so that the capillary workpiece will not fall through the flow channel, and the input airflow from the detection head can be released at the same time.

[0017] Furthermore, the capillary workpiece is a metal capillary workpiece.

[0018] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0020] Figure 1 A schematic diagram of the structure of the device for automatically screening capillaries provided by the utility model;

[0021] Figure 2 for Figure 1 The structural diagram of the other side;

[0022] Among them, 1-frame, 2-rotating shaft (the power source is a motor with a reducer), 3-cylinder fixing plate, 4-cylinder (driven by an air source), 5-pressure plate, 6-measuring head, 7-synchronous wheel, 8-synchronous belt, 9-workpiece bracket, 10-pallet 1, 11-pallet 2, 12-flip plate (with angle motor), 13-cylinder sensor (cylinder drive signal), 14-workpiece sensor (workpiece signal) 15 differential pressure sensor. Implementation

[0023] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions; the embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be interpreted as limiting the present invention.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying 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 operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] The conception of the utility model is as follows: when gas passes through micropores with equal cross-sections and constant lengths, the gas resistance remains unchanged and the pressure remains constant; a cylinder fixing plate, a synchronous wheel and a synchronous belt are operated synchronously; a coaxial detection head is used to press the capillary workpiece; a constant airflow is input; the pressure difference on both sides of the capillary is detected, thereby determining whether the capillary is qualified or not; in this way, qualified capillaries can be identified more accurately and quickly, which greatly improves efficiency and reduces costs.

[0026] in, Figure 1 A schematic diagram of the structure of the device for automatically screening capillaries provided by the utility model; Figure 2 for Figure 1 Schematic diagram of the structure on the other side.

[0027] As shown in the figure, according to an embodiment of the utility model, the device for automatically screening capillaries includes a frame with a rotating shaft; a cylinder fixed plate installed on the frame and rotating around the rotating shaft, the outer edge of the cylinder fixed plate is installed with a cylinder with n telescopic shafts extending downward, the telescopic shaft is installed with a detection head, a synchronous wheel installed on the rotating shaft is arranged below the cylinder fixed plate, the synchronous wheel and the synchronous belt are rotatably connected, the synchronous belt is provided with a workpiece holder for mounting a capillary workpiece, the detection head contacts the capillary workpiece when the telescopic shaft extends downward to form an air flow channel, the device also includes a differential pressure sensor for reading the air pressure difference at both ends of the capillary workpiece, and the device also includes a gas delivery control component for delivering gas to the detection head and the capillary workpiece and controlling the shutoff and opening of gas delivery.

[0028] In addition, the device for automatically screening capillaries disclosed in the utility model also has the following additional technical features:

[0029] According to some embodiments of the utility model, the cylinder and the workpiece holder correspond one-to-one in the working state, the cylinder fixed disk and the synchronous wheel are fixedly connected to the rotating shaft, and the workpiece holder on the synchronous belt corresponds one-to-one with the cylinder on the cylinder fixed disk during the rotation of the synchronous wheel, and the detection head and the capillary are in a coaxial state to ensure the identity of the airflow input, making the measurement structure more accurate.

[0030] According to some embodiments of the utility model, the cylinders are equidistantly distributed along the outer edge of the cylinder fixing plate, the workpiece holders installed on the synchronous belt are equidistantly distributed, the distance between the cylinders is equal to the distance between the workpiece holders, and the detection head installed on the cylinder and the capillary workpiece installed on the workpiece holder are coaxial and equidistantly distributed in the working state, which can make the design of the cylinder and the workpiece holder on the outer edge of the cylinder fixing plate and the synchronous belt more convenient, and at the same time more stable in the working state.

[0031] According to some embodiments of the utility model, a pressure plate is arranged under the synchronous wheel, and the synchronous wheel, the cylinder fixed plate and the pressure plate are all fixedly connected to the rotating shaft. The pressure plate can ensure that the workpiece to be measured moves synchronously with the cylinder and is relatively still; and it provides support when the cylinder presses the workpiece.

[0032] According to some embodiments of the utility model, a support plate is installed below the workpiece support.

[0033] According to an embodiment of the utility model, the support plate is divided into two pieces, which are respectively located below the synchronous belt on both sides of the synchronous wheel. The support plate is divided into two pieces, which is more conducive to standardization and also saves costs.

[0034] According to some embodiments of the utility model, a flipping mechanism including a flipping motor and a flipping structure is provided on the support plate, and the flipping mechanism is located below the preset workpiece support. The flipping mechanism is used to screen out unqualified capillaries. After determining the position of the unqualified capillaries on the synchronous belt, when the unqualified capillaries follow the synchronous belt to the flipping mechanism, the flipping mechanism receives an instruction to flip the plate, and the capillaries fall from here, thereby realizing the screening process of the capillaries.

[0035] According to some embodiments of the utility model, the device also includes a workpiece sensor for detecting whether the capillary workpiece exists on the workpiece holder, and a cylinder sensor for driving the cylinder. During the operation of the device, it is necessary to detect whether there is a capillary workpiece on the workpiece holder. If not, the corresponding cylinder does not move. If so, the corresponding cylinder extends a telescopic rod downward, and the detection head and the capillary workpiece are pressed tightly to detect the pressure difference at both ends of the input airflow, thereby determining whether the capillary is qualified.

[0036] According to some embodiments of the utility model, the pressure plate is provided with a flow channel for discharging the airflow input from the top of the capillary workpiece. After the capillary workpiece enters the pressure plate, the end of the capillary workpiece is located on the flow channel, the cylinder fixed plate, the synchronous wheel, and the synchronous belt operate synchronously, the detection head and the upper end of the capillary workpiece are pressed tightly, and the airflow is input to the capillary workpiece through the detection head. The airflow flows out through the end of the capillary workpiece, and the differential pressure sensor performs differential pressure detection to determine whether the capillary workpiece is qualified or not. The differential pressure sensor is placed in the bypass of the air intake path of the cylinder.

[0037] According to an embodiment of the present invention, the size of the flow channel is smaller than the outer diameter of the capillary workpiece, so that the capillary workpiece will not fall through the flow channel, and the input airflow from the detection head can be released at the same time.

[0038] According to some embodiments of the present invention, the capillary workpiece is a metal capillary workpiece.

[0039] Any reference to "one embodiment", "embodiment", "illustrative embodiment", etc. means that the specific components, structures or features described in conjunction with the embodiment are included in at least one embodiment of the present invention; the schematic expressions in various places in this specification do not necessarily refer to the same embodiment; and, when specific components, structures or features are described in conjunction with any embodiment, it is claimed that the implementation of such components, structures or features in conjunction with other embodiments is within the scope of those skilled in the art.

[0040] Although the specific implementation methods of the present invention have been described in detail with reference to a number of illustrative embodiments of the present invention, it must be understood that those skilled in the art can design a variety of other improvements and embodiments, which will fall within the spirit and scope of the principles of the present invention; specifically, within the scope of the foregoing disclosure, drawings and claims, reasonable modifications and improvements can be made in the arrangement of parts and / or subordinate combination layouts without departing from the spirit of the present invention; except for modifications and improvements in parts and / or layouts, the scope is defined by the attached claims and their equivalents.

Claims

1. A device for automatically screening capillaries, characterized in that: include: A frame with a rotating shaft; a cylinder fixing plate installed on the frame and rotating around the rotating shaft, a cylinder with n telescopic shafts extending downward is installed on the outer edge of the cylinder fixing plate, a detection head is installed on the telescopic shaft, a synchronous wheel installed on the rotating shaft is arranged below the cylinder fixing plate, the synchronous wheel and the synchronous belt are rotationally connected, a workpiece holder for mounting a capillary workpiece is arranged on the synchronous belt, the detection head contacts the capillary workpiece when the telescopic shaft extends downward to form an air flow channel, the device also includes a differential pressure sensor for reading the air pressure difference at both ends of the capillary workpiece, and the device also includes a gas delivery control component for delivering gas to the detection head and the capillary workpiece and controlling the shutoff and opening of gas delivery.

2. The device for automatically screening capillaries according to claim 1, characterized in that: The cylinder and the workpiece support correspond one to one in the working state.

3. The device for automatically screening capillaries according to claim 1, characterized in that: The cylinders are evenly distributed along the outer edge of the cylinder fixing plate, the workpiece holders installed on the synchronous belt are evenly distributed, the distance between the cylinders is equal to the distance between the workpiece holders, and the detection head installed on the cylinder and the capillary workpiece installed on the workpiece holder are coaxial in the working state.

4. The device for automatically screening capillaries according to claim 1, characterized in that: A pressure plate is arranged below the synchronous wheel, and the synchronous wheel, the cylinder fixing plate and the pressure plate are all fixedly connected to the rotating shaft.

5. The device for automatically screening capillaries according to claim 1, characterized in that: A supporting plate is installed below the workpiece support.

6. The device for automatically screening capillaries according to claim 5, characterized in that: There are two supporting plates, which are respectively located below the synchronous belt on both sides of the synchronous wheel.

7. The device for automatically screening capillaries according to claim 5, characterized in that: The support plate is provided with a flap mechanism including a flap motor and a flap structure, and the flap mechanism is located below the preset workpiece support.

8. The device for automatically screening capillaries according to claim 1, characterized in that: The device further comprises a workpiece sensor for detecting whether the capillary workpiece exists on the workpiece support, and a cylinder sensor for driving the cylinder.

9. The device for automatically screening capillaries according to claim 4, characterized in that: The pressure plate is provided with a flow channel for discharging the airflow input from above the capillary workpiece.

10. The device for automatically screening capillaries according to claim 9, characterized in that: The flow channel size is smaller than the outer diameter of the capillary workpiece.

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