Peristaltic pump head and peristaltic pump

Abstract

The embodiment of the utility model discloses a peristaltic pump head and a peristaltic pump, and the peristaltic pump head comprises a body, an upper pressing support, a pressing block, a turning cover and a first Hall sensing device; the upper pressing support is connected with the body in a sliding mode, the turning cover is hinged to the body and movably connected with the upper pressing support, and when the turning cover turns over relative to the body under the action of external force, the turning cover can drive the upper pressing support to do linear motion in the height direction of the body; the pressing block is installed on the upper pressing support, a roller set is installed in the body, and a space for containing a hose is formed between the pressing block and the roller set. And the first Hall sensing device is used for transmitting a shutdown signal to the driver when the flip cover is opened. According to the scheme, the first Hall sensing device is additionally arranged, so that the purpose of uncovering shutdown is achieved, and the structure is simplified.

Description

Technical Field

[0001] The present application relates to the technical field of peristaltic pumps, and in particular to a peristaltic pump head and a peristaltic pump with lid opening shutdown and speed monitoring functions. Background Art

[0002] When a peristaltic pump is operating, the rollers rotate and squeeze the hose, creating unstable pressure on the pressure block and the risk of it popping out. Once the pressure block pops out, liquid transfer is interrupted, resulting in metering errors. If the pump is running at high speeds, the hose inside the pump head may be thrown out, causing the transferred liquid to splash, potentially causing personal injury and property damage. Furthermore, if a leaking roller assembly is still in motion, it poses a risk of injury. Summary of the Invention

[0003] To solve the above technical problems, the embodiments of this specification are implemented as follows:

[0004] In a first aspect, an embodiment of the present specification provides a peristaltic pump head, comprising: a body, an upper pressure bracket, a pressure block, a flip cover, and a first Hall sensor device;

[0005] The upper pressing bracket is slidably connected to the body, the flip cover is hinged on the body and movably connected to the upper pressing bracket, and when the flip cover flips relative to the body under the action of an external force, it can drive the upper pressing bracket to perform linear motion along the height direction of the body;

[0006] The pressing block is installed on the upper pressing bracket, a roller group is installed inside the body, and a space for accommodating the hose is formed between the pressing block and the roller group;

[0007] The first Hall sensor device is used to transmit a shutdown signal to the driver when the flip cover is opened.

[0008] Optionally, the first Hall sensor device includes a first magnet for emitting signals and a first Hall element for receiving signals, the first Hall element is mounted on the body, the first magnet is mounted on a movable part, and the movable part is movable relative to the body.

[0009] Optionally, the first magnet is mounted on the upper pressure bracket, and the first Hall element is mounted on the main body at a position close to the first magnet.

[0010] Optionally, the peristaltic pump head further includes: a lever, the lever is fixedly connected to the hinge shaft of the flip cover, the first magnet is mounted on the lever, and the first Hall element is mounted on the body at a position close to where the lever falls.

[0011] Optionally, the peristaltic pump head further includes: a second Hall sensor device for detecting an actual rotational speed of the peristaltic pump head.

[0012] Optionally, the second Hall sensing device includes a second magnet for emitting signals and a second Hall element for receiving signals, and the second Hall element is connected to the driver.

[0013] Optionally, the second magnet is mounted on the circumferential edge of the side end face of the roller bracket, and the second Hall element is mounted on the body at a position corresponding to the circular motion circumference of the second magnet.

[0014] Optionally, the second magnet is mounted on the roller shaft, and the second Hall element is mounted on the body at a position corresponding to the circular motion circumference of the second magnet.

[0015] Optionally, there are a plurality of second magnets, and the plurality of second magnets are evenly arranged on the circumference of their rotational motion.

[0016] In a second aspect, an embodiment of the present specification provides a peristaltic pump, including the peristaltic pump head as described above, wherein the roller shafts of the roller group are connected to the output shaft of the driver.

[0017] The above at least one technical solution adopted in the embodiment of the present specification can achieve the following beneficial effects:

[0018] 1. Adding a first Hall sensing device to achieve the purpose of stopping the machine when the cover is opened, and simplifying the structure.

[0019] 2. Adding a second Hall sensing device can detect the actual rotation speed of the peristaltic pump head. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings described herein are used to provide a further understanding of the present application, and constitute a part of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application, and do not constitute an improper limitation to the present application. In the drawings:

[0021] Figure 1 is a schematic three-dimensional structure diagram of the closed state of a peristaltic pump head provided by an embodiment of the present specification;

[0022] Figure 2 is Figure 1 the schematic three-dimensional structure diagram of the open state of;

[0023] Figure 3 is the first layout schematic diagram of the first Hall sensing device;

[0024] Figure 4 is the schematic diagram of the internal structure of the flip cover;

[0025] Figure 5 is the second layout schematic diagram of the first Hall sensing device;

[0026] Figure 6 Schematic diagram of an arrangement of a second Hall sensing device;

[0027] Reference numerals in the drawings: 1, body; 2, upper pressing bracket; 3, flip cover; 4, limiting plate; 5, roller group; 6, roller bracket; 7, first Hall element; 8, first installation groove; 9, second installation groove; 10, second Hall element; 11, third installation groove; 12, lever; 13, first magnet. Specific embodiments

[0028] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and the corresponding drawings. Apparently, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of the present application.

[0029] The following will, with reference to the drawings, elaborate on the technical solutions provided by the embodiments of the present application in detail.

[0030] The Hall voltage changes with the magnetic field strength. The stronger the magnetic field, the higher the voltage; the weaker the magnetic field, the lower the voltage. The Hall voltage value is very small, usually only a few millivolts, but it can be amplified by an amplifier in an integrated circuit to a level sufficient to output a strong signal.

[0031] This solution adopts the principle of Hall induction to provide a peristaltic pump that can stop when the cover is opened.

[0032] Among them, as Figure 2 shown, the basic structure of the peristaltic pump head includes:

[0033] Body 1, inside which a roller group 5 is installed, and the rotating shaft of the roller group 5 can be connected to the output shaft of the driver.

[0034] Upper pressing bracket 2, which is slidably connected to the body 1 and can slide along the height direction of the body 1; a pressing block is installed on the upper pressing bracket 2, forming a channel for accommodating a hose with the roller group 5.

[0035] Flip cover 3, which is hinged to the body 1 and is movably linked to the upper pressing bracket 2. When the flip cover 3 rotates around the hinge axis under an external force, it can drive the upper pressing bracket 2 to perform a linear reciprocating motion along the height direction of the body 1.

[0036] Based on the above structure, a first Hall sensing device is added to achieve the purpose of stopping the machine when the cover is opened. Specifically, a first magnet for emitting signals and a first Hall element for receiving signals are respectively arranged on the movable part and the fixed part. When the first magnet approaches the first Hall element, the magnetic field around the first Hall element becomes stronger, the Hall voltage rises and conveys the signal to the controller. After receiving the signal, the controller sends a driving instruction to the motor. When the first magnet moves away from the first Hall element, the magnetic field around the first Hall element becomes weaker, the Hall voltage drops and conveys the signal to the controller. After receiving the signal, the controller sends a stop instruction to the motor. Thus, the functions of stopping the machine when the cover is opened and starting the machine when the cover is closed are completed.

[0037] Among them, there are several combinations of the movable part and the fixed part:

[0038] First, as Figure 3 shown, the movable part can be the lever 12, the fixed part is the body 1. A circular magnet mounting position is arranged on the lever 12, and the mounting groove 8 at the rear of the body 1 is used to mount the first Hall element 7 for receiving the induction signal.

[0039] Since the induction signals obtained when the first magnet 13 approaches and moves away from the first Hall element 7 are different, it is determined whether the current state of the peristaltic pump head is the open cover state. When the lever 12 drops and the pump head closes, the first magnet 13 is just located at the position close to the first Hall element 7. When the lever 12 is opened, the first magnet 13 moves away from the first Hall element 7.

[0040] Second, as Figure 5 shown, the movable part can also be the upper pressing bracket 2. The upper pressing bracket 2 is movably connected to the flip cover 3 and can make a reciprocating up and down movement along the body 1 under the drive of the flip cover 3.

[0041] In this solution, a magnet mounting hole is arranged on the upper pressing bracket 2 (or the limit plate 4), and the mounting groove 9 at the position of the body 1 close to the mounting hole of the first magnet 13 is used to mount the first Hall element 7 for receiving the induction signal. When the upper pressing bracket 2 drops with the flip cover 3 and the pump head closes, the magnet is just located at the position close to the first Hall element 7.

[0042] When the flip cover 3 is opened, the first magnet 13 slides upward with the upper pressing bracket 2 and moves away from the first Hall element 7.

[0043] This solution adopts the principle of Hall induction and also provides a function of being able to detect the actual rotation speed of the peristaltic pump head. Similar to the previous function of stopping the machine when the cover is opened, a magnet for emitting signals and a Hall element for receiving signals are respectively arranged on the movable part and the fixed part, and the Hall element is connected to the controller circuit board.

[0044] Among them, the movable part can be the roller bracket 6 or the roller shaft. One or more magnet mounting grooves 11 are provided on the circumferential surface of the side end face of the roller bracket 6; or magnets are mounted on one or more roller shafts; so that the magnets rotate synchronously with the roller group 5.

[0045] The fixing part can be the pump head body 1. Specifically, a Hall element is installed on the body 1 at a position corresponding to the circumferential movement of the magnet, as follows Figure 6 shown.

[0046] When the magnet rotates synchronously with the roller group 5, when the magnet moves to a position close to the second Hall element 10, the voltage of the second Hall element 10 changes and sends a signal to the controller. The controller records the change information. The controller judges the current rotation speed of the pump head roller group 5 according to the periodic magnet signal induction and compares it with the rotation speed set by the system.

[0047] When a motor failure or motor out-of-step occurs, the controller compares the signal transmitted by the second Hall element 10 with the rotation speed set by the system, and it can be concluded that the movement of the pump head roller group 5 is abnormal. Based on this, a further processing solution program can be made.

[0048] When multiple magnets are installed on the movable part in the above solution, the multiple magnets are evenly arranged on the circumference to which their rotational movement belongs.

[0049] It should also be noted that the term "including", "comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that a peristaltic pump head or peristaltic pump including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such peristaltic pump head or peristaltic pump. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the peristaltic pump head or peristaltic pump including the said element.

[0050] The above are only examples of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A peristaltic pump head, characterized in that, Comprising: A body, an upper pressing bracket, a pressing block, a flip cover and a first Hall sensing device; The upper pressing bracket is slidably connected to the body, the flip cover is hinged to the body and is movably connected to the upper pressing bracket. When the flip cover is flipped relative to the body under an external force, it can drive the upper pressing bracket to move linearly along the height direction of the body; The pressing block is installed on the upper pressing bracket, a roller group is installed inside the body, and a space for accommodating a hose is formed between the pressing block and the roller group; The first Hall sensing device is used to transmit a stop signal to the driver when the flip cover is opened.

2. The peristaltic pump head according to claim 1, characterized in that, The first Hall sensing device includes a first magnet for emitting a signal and a first Hall element for receiving the signal. The first Hall element is installed on the body, and the first magnet is installed on a movable member, and the movable member is relatively movable with respect to the body.

3. The peristaltic pump head according to claim 2, wherein The first magnet is installed on the upper pressing bracket, and the first Hall element is installed at a position on the body close to the first magnet.

4. The peristaltic pump head according to claim 2, wherein The peristaltic pump head further includes: a lever, the lever is fixedly connected to the hinge shaft of the flip cover, the first magnet is installed on the lever, and the first Hall element is installed at a position on the body close to the position where the lever falls.

5. The peristaltic pump head according to claim 1, wherein, The peristaltic pump head further includes: a second Hall sensing device for detecting the actual rotation speed of the peristaltic pump head.

6. The peristaltic pump head according to claim 5, characterized in that, The second Hall sensing device includes a second magnet for emitting a signal and a second Hall element for receiving the signal. The second Hall element is connected to the driver.

7. The peristaltic pump head according to claim 6, characterized in that, The second magnet is installed on the circumferential surface of the side end face of the roller bracket, and the second Hall element is installed at a position on the body corresponding to the movement circumference of the second magnet.

8. The peristaltic pump head according to claim 6, wherein The second magnet is installed on the roller shaft of the roller group, and the second Hall element is installed at a position on the body corresponding to the movement circumference of the second magnet.

9. The peristaltic pump head according to claim 6, characterized in that, There are a plurality of the second magnets, and the plurality of second magnets are evenly arranged on the circumference of their rotational movement.

10. A peristaltic pump, characterized in that, The peristaltic pump includes the peristaltic pump head according to claim 1, wherein the roller shaft of the roller group is connected to the output shaft of the driver.

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