Miniature peristaltic pump

Abstract

The utility model belongs to the field of peristaltic pumps, and particularly relates to a miniature peristaltic pump which comprises a pump shell, a peristaltic pipe is arranged in the pump shell, a liquid inlet connector is connected to the inner side of an opening in the tail end of the peristaltic pipe in a sliding mode, a connecting frame is fixedly connected to the bottom of the pump shell, and a hollow sleeve is fixedly connected to the tail end of the connecting frame. The hollow sleeve is slidably connected to the outer side of the peristaltic tube. The hollow sleeve is additionally arranged at the pipe opening of the peristaltic pipe and fixed to the pump shell through the connecting frame, in addition, the inner threaded sleeve in threaded connection with the hollow sleeve is arranged on the outer side of the hollow sleeve, the sliding pin which can slide and is elastically supported through the spring is arranged on the side wall of the hollow sleeve, and the clamping block is arranged at the tail end of the sliding pin, so that the clamping block is clamped between the sliding pin and the peristaltic pipe. After the internal thread sleeve is screwed, the sliding pin can bear the radial inward thrust of the hollow sleeve, so that the clamping blocks apply inner clamping force to the peristaltic pipe, and the liquid inlet connector connected with the pipeline is more firmly installed at the pipe opening of the peristaltic pipe and is not prone to being separated from the peristaltic pipe due to stress.

Description

Technical Field

[0001] This utility model relates to the field of peristaltic pumps, specifically a miniature peristaltic pump. Background Technology

[0002] A miniature peristaltic pump is a miniaturized peristaltic pump primarily used for microfluidic transport and precision control. It employs the peristaltic principle, delivering liquids by compressing a flexible tube.

[0003] A search revealed a utility model patent with authorization announcement number CN217055540U, which discloses a miniature peristaltic pump, including a peristaltic pump body. The peristaltic pump body is provided with a peristaltic pump roller seat, which is connected to a drive motor. The peristaltic pump roller seat is provided with a plurality of mounting posts arranged in a ring, and a peristaltic pump roller is rotatably sleeved on each mounting post. The peristaltic pump body is provided with an inlet connector and an outlet connector, and the inlet connector is connected to one end of the peristaltic pump tube.

[0004] In existing miniature peristaltic pumps, the inlet connector is typically inserted directly into the pump tubing, making it prone to detachment under pressure and affecting its operation. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to provide a miniature peristaltic pump that solves the problem that in existing miniature peristaltic pumps, the inlet connector is usually directly inserted into the opening of the peristaltic pump tube, which is easy to fall off under force and affect the use.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a miniature peristaltic pump, comprising a pump housing, a peristaltic tube disposed inside the pump housing, an inlet connector slidably connected to the inner side of the end opening of the peristaltic tube, a connecting frame fixedly connected to the bottom of the pump housing, a hollow sleeve fixedly connected to the end of the connecting frame, the hollow sleeve slidably connected to the outer side of the peristaltic tube, an internal threaded sleeve being threadedly connected to the outer side of the hollow sleeve, a locking mechanism being provided between the connecting frame and the internal threaded sleeve, a sliding pin slidably connected inside the side wall of the hollow sleeve, the sliding pin penetrating the hollow sleeve, one end of the sliding pin abutting against the internal threaded sleeve, and a clamping block fixedly connected to the other end of the sliding pin, the clamping block abutting against the peristaltic tube.

[0007] Preferably, the clamping block is slidably connected to the side wall of the hollow sleeve, and the clamping block is made of silicone. The silicone clamping block can increase the friction between the sliding pin and the peristaltic tube.

[0008] Preferably, a retaining ring is fixedly connected to the pin body of the sliding pin, and a spring is sleeved on the outer side of the pin body. One end of the spring is fixedly connected to the retaining ring, and the other end of the spring is fixedly connected to the outer wall of the hollow sleeve. By setting the spring, the elastic force can be applied to the sliding pin through the retaining ring, which has an auxiliary repositioning function for the sliding pin.

[0009] Preferably, a guide rod is fixedly connected to the outer wall of the hollow sleeve. The guide rod passes through the retaining ring and is slidably connected to the retaining ring. A limit block is fixedly connected to the end of the guide rod. The guide rod, in conjunction with the retaining ring, guides the sliding movement of the sliding pin under force.

[0010] Preferably, the locking mechanism includes a locking pin slidably connected inside the connecting frame. The locking pin is inserted into the internal threaded sleeve. A second spring is provided inside the connecting frame. One end of the second spring is fixedly connected to the locking pin, and the other end of the second spring is fixedly connected to the inner surface of the connecting frame. The locking mechanism effectively locks the internal threaded sleeve, preventing loosening of the threads between it and the hollow sleeve.

[0011] Preferably, the internal threaded sleeve has multiple locking holes arranged in a ring array, and the end of the locking pin is located within the locking holes. The locking holes facilitate the insertion of the locking pin after the internal threaded sleeve rotates.

[0012] Preferably, a dial ring is fixedly connected to the pin body of the locking pin, and the dial ring and the locking pin are an integral structure. The dial ring facilitates the movement of the locking pin.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model adds a hollow sleeve at the inlet of the peristaltic tube, and the hollow sleeve is fixed to the pump housing by a connecting bracket. In addition, an internal threaded sleeve is provided on the outside of the hollow sleeve and is threaded to it. The side wall of the hollow sleeve is provided with a sliding pin that can slide and is elastically supported by a spring. A clamping block is provided at the end of the sliding pin. In this way, when the internal threaded sleeve is screwed, the sliding pin will be pushed radially inward by the hollow sleeve, thereby causing the clamping block to apply an internal clamping force to the peristaltic tube. This makes the liquid inlet connector of the pipeline connection more firmly installed at the inlet of the peristaltic tube and less likely to come off under force.

[0015] 2. This utility model provides a locking mechanism within the connecting frame. The locking pin is inserted into the internal threaded sleeve from above under the elastic force of the spring. The internal threaded sleeve has a ring of locking holes distributed in an array. This locks the internal threaded sleeve, preventing the threads between it and the hollow sleeve from loosening, and further ensuring the stability of the liquid inlet connector installation. Attached Figure Description

[0016] Figure 1 This is a three-dimensional view of the overall structure of this utility model;

[0017] Figure 2 For the present utility model Figure 1 A schematic diagram of a partial structure;

[0018] Figure 3 For the present utility model Figure 1 A partial structural front sectional view;

[0019] Figure 4 For the present utility model Figure 3 A magnified view of the local structure;

[0020] Figure 5 For the present utility model Figure 4 Enlarged view of the structure of part A.

[0021] In the diagram: 1. Pump housing; 2. Peristaltic tube; 3. Inlet connector; 4. Connecting frame; 5. Hollow sleeve; 6. Internal threaded sleeve; 7. Locking mechanism; 8. Sliding pin; 9. Clamping block; 10. Retaining ring; 11. Spring 1; 12. Guide rod; 13. Limiting block; 71. Locking pin; 72. Dial ring; 73. Spring 2. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-5 A miniature peristaltic pump includes a pump housing 1, inside which a peristaltic tube 2 is disposed. An inlet connector 3 is slidably connected to the inner side of the end opening of the peristaltic tube 2. A connecting frame 4 is fixedly connected to the bottom of the pump housing 1, and a hollow sleeve 5 is fixedly connected to the end of the connecting frame 4. The hollow sleeve 5 is slidably connected to the outer side of the peristaltic tube 2. An internally threaded sleeve 6 is threadedly connected to the outer side of the hollow sleeve 5. A sliding pin 8 is slidably connected to the inner side wall of the hollow sleeve 5, and the sliding pin 8 penetrates the hollow sleeve 5. One end of the sliding pin 8 abuts against the internally threaded sleeve 6, and the other end of the sliding pin 8 is fixedly connected to a clamping block 9, which abuts against the peristaltic tube 2. The clamping block 9 is slidably connected to the inner side wall of the hollow sleeve 5 and is made of silicone. The silicone material of the clamping block 9 increases the friction between the sliding pin 8 and the peristaltic tube 2.

[0024] Please see Figure 5A retaining ring 10 is fixedly connected to the pin body of the sliding pin 8. A spring 11 is sleeved on the outside of the pin body of the sliding pin 8. One end of the spring 11 is fixedly connected to the retaining ring 10, and the other end of the spring 11 is fixedly connected to the outer wall of the hollow sleeve 5. The spring 11 allows the elastic force to act on the sliding pin 8 through the retaining ring 10, thus assisting in the reset of the sliding pin 8. A guide rod 12 is fixedly connected to the outer wall of the hollow sleeve 5. The guide rod 12 passes through the retaining ring 10 and is slidably connected to the retaining ring 10. A limit block 13 is fixedly connected to the end of the guide rod 12. The guide rod 12, in cooperation with the retaining ring 10, guides the sliding movement of the sliding pin 8 under force.

[0025] Please see Figure 4 A locking mechanism 7 is provided between the connecting frame 4 and the internal threaded sleeve 6. This mechanism locks the internal threaded sleeve 6, preventing loosening of the threads between it and the hollow sleeve 5. The locking mechanism 7 includes a locking pin 71 slidably connected inside the connecting frame 4. The locking pin 71 is inserted into the internal threaded sleeve 6. A second spring 73 is provided inside the connecting frame 4. One end of the second spring 73 is fixedly connected to the locking pin 71, and the other end is fixedly connected to the inner surface of the connecting frame 4. The internal threaded sleeve 6 has multiple locking holes arranged in a ring array, and the end of the locking pin 71 is located within these holes. The locking holes facilitate the insertion of the locking pin 71 after the internal threaded sleeve 6 rotates. A dial ring 72 is fixedly connected to the pin body of the locking pin 71, and the dial ring 72 is an integral part of the locking pin 71. The dial ring 72 facilitates pushing the locking pin 71.

[0026] The specific implementation process of this utility model is as follows: In use, firstly, the inlet connector 3 for pipeline connection is inserted into the opening of the peristaltic tube 2. Then, the locking pin 71 is pushed by the deflector ring 72, causing it to slide into the connecting frame 4 and compressing the spring 73. At the same time, the locking pin 71 disengages from the internal threaded sleeve 6, thereby releasing the restriction on the internal threaded sleeve 6. Then, while maintaining the state of the locking pin 71, the internal threaded sleeve 6 is screwed. The internal threaded sleeve 6 moves through the threaded movement between it and the hollow sleeve 5. Subsequently, the sliding pin 8 will be subjected to... The radial inward thrust of the hollow sleeve 5 causes the clamping block 9 at the end of the sliding pin 8 to apply an internal clamping force to the peristaltic tube 2, thereby making the inlet connector 3 of the pipeline connection more firmly installed at the opening of the peristaltic tube 2 and less likely to come off under force. Finally, when the ring 72 is released, the locking pin 71 will be reset under the action of the spring 73 and re-inserted into the internal threaded sleeve 6. This has a locking effect on the internal threaded sleeve 6, preventing the threads between it and the hollow sleeve 5 from loosening, and further ensuring the stability of the installation of the inlet connector 3.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A miniature peristaltic pump, comprising a pump housing (1), characterized in that: The pump housing (1) is provided with a peristaltic tube (2) inside. The inlet connector (3) is slidably connected to the inner side of the end opening of the peristaltic tube (2). The bottom of the pump housing (1) is fixedly connected to a connecting frame (4). The end of the connecting frame (4) is fixedly connected to a hollow sleeve (5). The hollow sleeve (5) is slidably connected to the outside of the peristaltic tube (2). The outside of the hollow sleeve (5) is connected to an inner threaded sleeve (6) by a thread. A locking mechanism (7) is provided between the connecting frame (4) and the inner threaded sleeve (6). A sliding pin (8) is slidably connected to the inside of the side wall of the hollow sleeve (5). The sliding pin (8) passes through the hollow sleeve (5). One end of the sliding pin (8) abuts against the inner threaded sleeve (6). The other end of the sliding pin (8) is fixedly connected to a clamp (9). The clamp (9) abuts against the peristaltic tube (2).

2. A miniature peristaltic pump according to claim 1, characterized in that: The clamp (9) is slidably connected to the side wall of the hollow sleeve (5), and the clamp (9) is made of silicone.

3. A miniature peristaltic pump according to claim 1, characterized in that: A retaining ring (10) is fixedly connected to the pin body of the sliding pin (8). A spring (11) is sleeved on the outside of the pin body of the sliding pin (8). One end of the spring (11) is fixedly connected to the retaining ring (10), and the other end of the spring (11) is fixedly connected to the outer wall of the hollow sleeve (5).

4. A miniature peristaltic pump according to claim 3, characterized in that: The hollow sleeve (5) is fixedly connected to a guide rod (12), which passes through the retaining ring (10) and is slidably connected to the retaining ring (10). The end of the guide rod (12) is fixedly connected to a limit block (13).

5. A miniature peristaltic pump according to claim 1, characterized in that: The locking mechanism (7) includes a locking pin (71) that is slidably connected inside the connecting frame (4). The locking pin (71) is inserted into the internal threaded sleeve (6). A second spring (73) is provided inside the connecting frame (4). One end of the second spring (73) is fixedly connected to the locking pin (71), and the other end of the second spring (73) is fixedly connected to the inner surface of the connecting frame (4).

6. A miniature peristaltic pump according to claim 5, characterized in that: The internal threaded sleeve (6) has multiple locking holes arranged in a ring array, and the end of the locking pin (71) is located inside the locking hole.

7. A miniature peristaltic pump according to claim 5, characterized in that: The locking pin (71) has a fixed ring (72) connected to its pin body, and the ring (72) and the locking pin (71) are an integral structure.

Images