High-precision peristaltic pump

Abstract

The utility model relates to a high accuracy peristaltic pump, including motor seat and end cover, is provided with the measuring groove on the end cover, and the measuring groove is at least partly communicated with the installation cavity, temperature sensor is installed on the motor seat, and temperature sensor is positioned with the position cooperation of measuring groove, when end cover is connected with the motor seat, and temperature sensor is contained in the measuring groove. The working temperature of peristaltic pump is monitored through temperature sensor, and the rotation speed of peristaltic pump is accurately adjusted according to the measured temperature, thereby the temperature change is compensated through the rotation speed, and the working accuracy of peristaltic pump is improved. Through installing temperature sensor at the positioning pin and extending to the measuring groove communicated with the positioning groove, the temperature sensor is not affected by the dismounting action such as pipe replacement of peristaltic pump, and the convenience of maintenance is improved.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pump technology, and in particular to a high-precision peristaltic pump. Background Technology

[0002] Peristaltic pumps have advantages such as pollution-free and sterile delivery and low shear force, and are being widely promoted and applied in various industries such as medical, pharmaceutical, food, beverage, chemical, and metallurgical industries.

[0003] During use, temperature changes can cause changes in the inner diameter of the peristaltic pump hose, which in turn causes changes in the volume of the closed cavity between two adjacent rollers, thus affecting the metering accuracy of the peristaltic pump.

[0004] Based on the above-mentioned technical problems, this application proposes a high-precision peristaltic pump. Utility Model Content

[0005] The purpose of this invention is to provide a high-precision peristaltic pump to solve the technical problems mentioned in the background art. This purpose is achieved through the following technical solution:

[0006] A high-precision peristaltic pump includes a motor base, a motor fixed to one side of the motor base, and a speed sensor mounted on the motor. An end cover is provided on the side of the motor base away from the motor, forming a sealed mounting cavity with the end cover. A compression assembly is installed within the mounting cavity and connected to the output shaft of the motor. A flexible tube is provided between the compression assembly and the inner wall of the end cover, with both ends of the tube extending out of the mounting cavity via connectors. A measuring groove is formed on the end cover, at least partially communicating with the mounting cavity. A temperature sensor is mounted on the motor base, and its position mates with the measuring groove. When the end cover is connected to the motor base, the temperature sensor is housed within the measuring groove.

[0007] Furthermore, a positioning pin is fixed on the motor base, and a receiving groove is opened at the end of the positioning pin. A wire hole is opened at the bottom of the receiving groove. The temperature sensor is installed in the receiving groove, and the signal wire of the temperature sensor extends out of the mounting cavity through the wire hole. A positioning groove is opened on the end cover, and a measuring groove is set at the bottom of the positioning groove. When the positioning pin is inserted into the positioning groove, the temperature sensor extends into the measuring groove.

[0008] Furthermore, the temperature sensor and the measuring tank are fitted with a gap, and thermal conductive paste is filled between the temperature sensor and the measuring tank.

[0009] Furthermore, the extrusion assembly includes a sun gear, a ring gear, and a planetary carrier. The sun gear is fixedly connected to the output shaft of the motor; the ring gear is fixedly connected to the motor base and is coaxially arranged with the output shaft of the motor; the planetary carrier includes a rotating support, and planetary gears are rotatably mounted between the rotating supports. The planetary gears mesh with the sun gear and the ring gear respectively. A roller is coaxially arranged on the side of the planetary gear away from the motor, and a hose is arranged between the roller and the inner wall of the end cap.

[0010] Furthermore, the motor is a dual-shaft motor, and the speed sensor is connected to the output shaft at the tail end of the motor.

[0011] Furthermore, it also includes a control module, with temperature and speed sensors electrically connected to the control module.

[0012] The technical solutions provided in this application have at least the following technical effects or advantages:

[0013] 1. The operating temperature of the peristaltic pump is monitored by a temperature sensor, and the rotation speed of the peristaltic pump is precisely adjusted according to the measured temperature. This compensates for temperature changes by adjusting the rotation speed, thereby improving the working accuracy of the peristaltic pump.

[0014] 2. By installing the temperature sensor at the positioning pin and extending it into the measuring groove that communicates with the positioning groove, disassembly actions such as changing the tube of the peristaltic pump will not affect the temperature sensor, thus improving the convenience of maintenance. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is an exploded view of an embodiment of this application;

[0017] Figure 2 This is a schematic diagram of the extrusion assembly structure according to an embodiment of this application;

[0018] Figure 3 This is a partial cross-sectional view of the motor mount according to an embodiment of this application;

[0019] Figure 4 This is a schematic diagram of the end cap structure according to an embodiment of this application.

[0020] Reference numerals: 1. Motor base; 11. Positioning pin; 111. Receiving groove; 112. Wire hole; 2. Motor; 3. Speed ​​sensor; 4. End cap; 41. Positioning groove; 411. Measuring groove; 5. Hoses; 6. Extrusion assembly; 61. Gear ring; 62. Rotating bracket; 63. Planetary gear; 64. Roller; 7. Connector; 8. Temperature sensor. Detailed Implementation

[0021] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0022] like Figure 1-4 The high-precision peristaltic pump shown includes a control module (not shown) and a motor base 1. A motor 2 is fixed to the right side of the motor base 1 by screws. The motor 2 is a dual-shaft motor. A speed sensor 3 is installed at the output shaft at the tail end of the motor 2. The speed sensor 3 is used to detect the speed of the motor 2 in order to achieve precise control of the speed of the motor 2.

[0023] Among them, the speed sensor 3 is a photoelectric encoder, which includes a grating disk, a light-emitting element and a photosensitive element. The grating disk is connected to the output shaft at the tail end of the motor 2. The light-emitting element and the photosensitive element are respectively installed on both sides of the grating disk. When the motor 2 rotates, the grating disk rotates at the same speed as the motor 2. The light emitted by the light-emitting element passes through the grating disk and forms several pulse signals on the photosensitive element. By calculating the number of pulses output by the photoelectric encoder per second, the current speed of the motor can be reflected.

[0024] like Figure 1 , Figure 4 As shown, an end cover 4 is installed on the left side of the motor base 1. The end cover 4 is detachably connected to the motor base 1 by a snap-fit, and the end cover 4 and the motor base 1 form a sealed mounting cavity. An extrusion assembly 6 is installed inside the mounting cavity, and the extrusion assembly 6 is fixedly connected to the output shaft at the left end of the motor 2. Two connectors 7 are installed at the lower end of the end cover 4, and a flexible hose 5 is connected between the two connectors 7. The flexible hose 5 is arranged between the outer side of the extrusion assembly 6 and the inner wall of the end cover 4. When the motor 2 rotates, the extrusion assembly 6 rotates around the output shaft of the motor 2, cyclically extruding and extruding the flexible hose 5, thereby pumping the medium inside the flexible hose 5.

[0025] like Figure 1 , Figure 2As shown, the extrusion assembly 6 includes a sun gear (not shown), a gear ring 61, and a planetary carrier. The sun gear is fixedly connected to the output shaft at the left end of the motor 2, allowing the sun gear and the output shaft of the motor 2 to rotate synchronously. The gear ring 61 is fixed to the left end face of the motor base 1 and is coaxially arranged with the output shaft of the motor 2. The planetary carrier includes two rotating supports 62, with three rotating shafts installed between the two rotating supports 62. The three rotating shafts are evenly distributed along the circumference of a construction circle concentric with the gear ring 61. Each rotating shaft is rotatably mounted with a planetary gear 63. A roller 64 is coaxially fixed to the left end of each planetary gear 63, and the outer end face of the roller 64 protrudes from the rotating support 62 and abuts against the hose 5. The planetary gears 63 mesh with the sun gear and the gear ring 61 respectively. When the motor 2 rotates, the planetary gears 63 rotate on their own axis while revolving around the sun gear. The differential speed structure of the planetary gear assembly is used to precisely control the speed at which the rollers 64 extrude the hose 5, achieving high-precision flow rate in a continuous and quantitative manner.

[0026] like Figures 1-3 As shown, a positioning pin 11 is fixed to the lower end of the left end face of the motor base 1. A receiving groove 111 extending axially along the left end of the positioning pin 11 is provided, and a wire hole 112 penetrating the motor base 1 is provided at the bottom of the receiving groove 111. A temperature sensor 8 is fixedly installed in the receiving groove 111, and the signal line of the temperature sensor 8 extends to the right side of the motor base 1 through the wire hole 112.

[0027] like Figure 1 , Figure 4 As shown, the end cover 4 has a positioning groove 41 on the lower side of its end face. A measuring groove 411 is formed at the bottom of the positioning groove 41, extending axially along the positioning groove 41. The upper part of the measuring groove 411 communicates with the mounting cavity. When the end cover 4 is connected to the motor base 1, the positioning pin 11 is inserted into the positioning groove 41, and simultaneously, the temperature sensor 8 extends into the measuring groove 411 to monitor the internal temperature of the peristaltic pump head. The temperature sensor 8 and the measuring groove 411 are fitted with a clearance, and thermal conductive paste is filled between the temperature sensor 8 and the measuring groove 411 to improve the accuracy of the internal temperature detection of the pump head.

[0028] The temperature sensor 8 and the speed sensor 3 are both electrically connected to the control module. The control module adjusts the speed of the motor 2 based on the temperature data measured by the temperature sensor 8 and the pumping volume obtained from different temperature tests, so as to compensate for temperature changes and improve the metering accuracy of the peristaltic pump.

[0029] The technical solutions provided in this application have at least the following technical effects or advantages:

[0030] 1. The operating temperature of the peristaltic pump is monitored by a temperature sensor, and the rotation speed of the peristaltic pump is precisely adjusted according to the measured temperature. This compensates for temperature changes by adjusting the rotation speed, thereby improving the working accuracy of the peristaltic pump.

[0031] 2. By installing the temperature sensor at the positioning pin and extending it into the measuring groove that communicates with the positioning groove, disassembly actions such as changing the tube of the peristaltic pump will not affect the temperature sensor, thus improving the convenience of maintenance.

[0032] 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. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A high-precision peristaltic pump, characterized in that, The device includes a motor mount, on one side of which a motor is fixed, and a speed sensor is mounted on the motor. An end cap is located on the side of the motor mount away from the motor, forming a sealed mounting cavity with the end cap. A pressing assembly is installed within the mounting cavity and connected to the output shaft of the motor. A flexible tube is positioned between the pressing assembly and the inner wall of the end cap, with both ends of the tube extending out of the mounting cavity via connectors. A measuring groove is formed on the end cap, at least partially communicating with the mounting cavity. A temperature sensor is mounted on the motor mount, and its position aligns with the measuring groove. When the end cap is connected to the motor mount, the temperature sensor is housed within the measuring groove.

2. The high-precision peristaltic pump according to claim 1, characterized in that, A positioning pin is fixed on the motor base. A receiving groove is opened at the end of the positioning pin. A wire hole is opened at the bottom of the receiving groove. The temperature sensor is installed in the receiving groove. The signal wire of the temperature sensor extends out of the mounting cavity through the wire hole. A positioning groove is opened on the end cover. The measuring groove is located at the bottom of the positioning groove. When the positioning pin is inserted into the positioning groove, the temperature sensor extends into the measuring groove.

3. A high-precision peristaltic pump according to claim 2, characterized in that, The temperature sensor is fitted with the measuring groove with a clearance, and the space between the temperature sensor and the measuring groove is filled with thermal conductive paste.

4. A high-precision peristaltic pump according to claim 1, characterized in that, The extrusion assembly includes a sun gear, a ring gear, and a planetary carrier. The sun gear is fixedly connected to the output shaft of the motor. The ring gear is fixedly connected to the motor base and is coaxially arranged with the output shaft of the motor. The planetary carrier includes a rotating support, and planetary gears are rotatably mounted between the rotating supports. The planetary gears mesh with the sun gear and the ring gear respectively. A roller is coaxially arranged on the side of the planetary gear away from the motor. The hose is arranged between the roller and the inner wall of the end cap.

5. A high-precision peristaltic pump according to claim 1, characterized in that, The motor is a dual-axis motor, and the speed sensor is connected to the output shaft at the tail end of the motor.

6. A high-precision peristaltic pump according to claim 1, characterized in that, It also includes a control module, and the temperature sensor and the speed sensor are both electrically connected to the control module.

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