A pump tube and peristaltic pump

Abstract

The application relates to a pump pipe and a peristaltic pump. The pump pipe comprises a pump pipe body provided with an inlet end and an outlet end, the inlet end is connected with a liquid source, and the outlet end outputs a liquid flow after passing through the peristaltic pump; a flow channel for liquid flow is arranged in the pump pipe body and communicates with the inlet end and the outlet end; a buffer cavity is arranged in the flow channel close to the outlet end of the pump pipe body, and the buffer cavity can be elastically deformed under the pressure of the liquid. The application effectively solves the problems of the output precision of the peristaltic pump and liquid splashing caused by pulse water flow by integrally arranging the buffer cavity in the flow channel of the pump pipe body.

Description

Technical Field

[0001] This application relates to the field of peristaltic pump technology, and in particular to a pump tube and a peristaltic pump. Background Technology

[0002] Peristaltic pumps are a new type of fluid transfer pump following rotary pumps, centrifugal pumps, and diaphragm pumps. They are being widely promoted and applied in various industries such as medical, pharmaceutical, food, beverage, chemical, and metallurgical. Peristaltic pumps operate by squeezing a flexible tubing (pump tube) with squeeze rollers. These squeeze rollers require two or more rollers or pressure blocks to compress the tubing and transfer the fluid.

[0003] However, according to the operating principle of peristaltic pumps, peristaltic pumps generate large pulses during normal operation, which affects the output accuracy of peristaltic pumps and also causes large splashing when peristaltic pumps pump liquid into receiving containers. The essential reason is that the large pulse generated by the pump head of the peristaltic pump is transmitted to the pipeline outlet.

[0004] Therefore, it is necessary to design a pump tube and a peristaltic pump to solve the technical problems mentioned above. Utility Model Content

[0005] This application provides a pump tube and a peristaltic pump, which effectively solves the problems of peristaltic pump output accuracy and liquid splashing caused by pulsed water flow.

[0006] A first aspect of this application provides a pump tube, comprising: a pump tube body having an inlet end and an outlet end, the inlet end being for connecting to a liquid source, and the outlet end being for outputting liquid flow after passing through a peristaltic pump; the pump tube body having a flow channel connecting the inlet end and the outlet end and allowing liquid to flow; and the pump tube body having a buffer cavity in the flow channel near the outlet end, the buffer cavity being capable of elastic deformation under liquid pressure.

[0007] A preferred embodiment is that, in the working state, the elastic deformation of the pump tube body at the location of the buffer cavity is greater than the elastic deformation at the location of the flow channel.

[0008] A preferred embodiment is that the wall thickness of the buffer cavity is less than the wall thickness of the flow channel.

[0009] A preferred embodiment is that the outer diameter of the pump tube body remains the same from the inlet end to the outlet end; the inner diameter of the buffer cavity is larger than the inner diameter of the flow channel; preferably, the internal connection between the buffer cavity and the flow channel is smooth.

[0010] A preferred embodiment is that the inner diameter of the pump tube body remains the same from the inlet end to the outlet end; the outer diameter of the buffer cavity is smaller than the outer diameter of the flow channel; preferably, the external connection between the buffer cavity and the flow channel is smooth.

[0011] A preferred embodiment is that the pump tube body is a flexible hose.

[0012] A preferred embodiment is that the flexible hose is made of rubber or silicone.

[0013] A preferred embodiment is that the pump pipe body includes a pump pipe section, an inlet clamp section, and an outlet clamp section; the inlet clamp section is integrally connected to the inlet of the pump pipe section; the outlet clamp section is integrally connected to the outlet of the pump pipe section; the liquid inlet is located at the inlet of the inlet clamp section; the liquid outlet is located at the outlet of the outlet clamp section; and the buffer cavity is located within the outlet clamp section.

[0014] A preferred embodiment is that the inlet clamping sections are arranged in parallel in two or more, and each inlet clamping section is individually connected to a storage device through a liquid inlet pipe.

[0015] A second aspect of this application provides a peristaltic pump, the peristaltic pump including the aforementioned pump tube, the pump tube being squeezed and outputting a liquid flow via a squeeze roller of the peristaltic pump.

[0016] Beneficial effects:

[0017] In existing peristaltic pumps, the large pulses generated by the pump head are transmitted to the pipeline outlet, affecting the pump's output accuracy and causing significant splashing when pumping liquid into the receiving container. Therefore, this application incorporates a buffer chamber within the flow channel near the liquid outlet of the pump tube body. This buffer chamber can elastically deform under liquid pressure. The liquid output from the pump tube body, squeezed by the peristaltic pump, has pulses. The inner wall of the buffer chamber expands or contracts in response to these pulses, effectively absorbing the pulse pressure and making the output smoother or constant. This effectively solves the problems of peristaltic pump output accuracy and liquid splashing caused by pulsed water flow. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the pump pipe structure in Embodiment 1;

[0019] Figure 2 This is a schematic diagram showing a buffer cavity in the cross-sectional view of the pump pipe in Embodiment 1;

[0020] Figure 3 This is a schematic diagram showing the two buffer chambers in the cross-sectional view of the pump pipe in Embodiment 1;

[0021] Figure 4This is a schematic diagram showing the pump pipe configuration of two inlets and one outlet in Embodiment 2.

[0022] Figure 5 This is a schematic diagram of the pump pipe structure in embodiment 3. Figure 1 ;

[0023] Figure 6 This is a schematic diagram showing a buffer cavity in the cross-sectional view of the pump pipe in Embodiment 3;

[0024] Figure 7 This is a schematic diagram of the pump pipe structure in embodiment 3. Figure 2 ;

[0025] Figure 8 This is a schematic diagram showing the two buffer chambers in the cross-sectional view of the pump pipe in Embodiment 3;

[0026] Figure 9 This is a schematic diagram showing the pump pipe configuration of two inlets and one outlet in Embodiment 4.

[0027] Figure 10 This is a schematic cross-sectional view of the pump tube installed inside the peristaltic pump in Embodiment 6. Figure 1 ;

[0028] Figure 11 This is a schematic cross-sectional view of the pump tube installed inside the peristaltic pump in Embodiment 6. Figure 2 ;

[0029] Figure 12 This is a partial cross-sectional schematic diagram of the pump tube installed inside the peristaltic pump in Embodiment 6.

[0030] Figure label:

[0031] 10. Pump tube body; 11. Inlet end; 12. Outlet end; 13. Flow channel; 14. Buffer chamber; 15. Pump tube section; 16. Inlet clamping section; 17. Outlet clamping section; 20. Peristaltic pump; 21. Squeeze roller. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0033] According to the operating principle of peristaltic pumps, peristaltic pumps generate large pulses during normal operation, which affects the output accuracy of peristaltic pumps and also causes large splashing when the peristaltic pump pumps liquid into the receiving container. The essential reason is that the large pulse generated by the pump head of the peristaltic pump is transmitted to the pipeline outlet.

[0034] The principle of the "fish bubble" type pulse damper is to use a large chamber with a soft outer wall material. When the outer wall of the chamber encounters a pulse, it expands or contracts accordingly, thereby canceling out the pulse. Therefore, based on the principle of the "fish bubble" type pulse damper, in order to achieve the same purpose, this application combines the "fish bubble" type pulse damper with the pump tube. The wall thickness of the section of the pump tube near the outlet of the peristaltic pump is made thinner and the wall thickness variation is made uniform. At this point, it can play a similar role to the "fish bubble" type pulse damper in eliminating pulses. Moreover, compared with the "fish bubble" type pulse damper in the prior art, this method is smaller in size, integrates the pump tube, saves space, and eliminates cleaning dead corners in the pipeline.

[0035] Example 1

[0036] Based on the above, Embodiment 1 of this application provides a pump pipe, please refer to... Figure 1 and Figure 2 As shown, the pump pipe includes: a pump pipe body 10, which is provided with an inlet end 11 and an outlet end 12. The inlet end 11 is used to connect to a liquid source, and the outlet end 12 is used to pass the liquid through a peristaltic pump 20 (e.g., Figure 10 (As shown) the output liquid flow; the pump tube body 10 is provided with a flow channel 13 that connects the inlet end 11 and the outlet end 12 and allows liquid to flow; the pump tube body 10 is provided with a buffer cavity 14 in the flow channel 13 near the outlet end 12, and the buffer cavity 14 can undergo elastic deformation under liquid pressure.

[0037] In this embodiment, a buffer cavity 14 is provided in the flow channel 13 near the liquid outlet 12 of the pump tube body 10. The buffer cavity 14 can elastically deform under liquid pressure. The buffer cavity 14 is equivalent to the function of the "fish bubble" type pulse damper in the prior art. The inner wall of the buffer cavity 14 can expand or contract accordingly when encountering a pulse, thereby canceling the pulse. At the same time, in this application, the buffer cavity 14 and the flow channel 13 inside the pump tube body 10 are integrated. It can be understood that in this application, a "fish bubble" type pulse damper component is not added separately to the pump tube body 10. Instead, the entire pump tube body 10 is integrated. The wall thickness of the section of the pump tube body 10 near the liquid outlet 12 is made thin and the wall thickness change is made uniform to form the buffer cavity 14. Here, it can play a similar role to the "fish bubble" type pulse damper in eliminating pulses. It should be noted that when the pulsed water enters the buffer chamber 14, it will expand the buffer chamber 14. The buffer chamber 14 has high elasticity and can effectively absorb the pulse pressure, thereby greatly reducing the pulse flow rate and even making it smooth.

[0038] In this embodiment, it should be noted that, under operating conditions, the elastic deformation of the pump tube body 10 at the buffer cavity 14 is greater than that at the flow channel 13. Under operating conditions, that is, when liquid flows within the flow channel 13 of the pump tube body 10, the buffer cavity 14 is more prone to elastic deformation, i.e., expansion or contraction, when encountering pulsed water, thereby effectively absorbing pulsed pressure.

[0039] In this embodiment, it should also be noted that the wall thickness of the buffer cavity 14 is less than the wall thickness of the flow channel 13. Setting the wall thickness of the buffer cavity 14 to be less than that of the flow channel 13 allows for easier elastic deformation. Therefore, when pulsed water flows within the buffer cavity 14, it is easier for the buffer cavity 14 to expand and effectively absorb the pulse pressure. For example, the wall thickness of the buffer cavity 14 can be 30-50% of the wall thickness of the flow channel 13, such as 30%, 31%, 32%, 35%, 38%, 38.5%, 39%, 40%, 50%, etc. It should be noted that the specific reduction in wall thickness of the buffer cavity 14 depends on the pipe material and elastic strength of the pump pipe body 10. If the pipe has poor elasticity, the thickness can be reduced further. Therefore, this embodiment does not specifically limit the thickness reduction of the buffer cavity 14. For example, if the working pressure is 0.3 bar, the pump tube body 10 is made of silicone material with a hardness of 55 degrees and a wall thickness of 2.5 mm, then the wall thickness of the buffer chamber 14 is reduced to 1.2 mm.

[0040] Please refer to Figure 2 As shown, in one feasible approach, the wall thickness of the buffer cavity 14 is less than the wall thickness of the flow channel 13. This can be achieved by thinning the inner wall of the buffer cavity 14. Therefore, the outer diameter of the pump tube body 10 remains the same from the inlet end 11 to the outlet end 12, while the inner diameter of the buffer cavity 14 is larger than the inner diameter of the flow channel 13. It is understandable that setting the inner diameter of the buffer cavity 14 to be larger than the inner diameter of the flow channel 13, while maintaining the same outer diameter of the buffer cavity 14 from the inlet end 11 to the outlet end 12, is equivalent to thinning the inner wall of the buffer cavity 14. Thinning the inner wall increases the elasticity of this portion of the pipe wall and also increases its actual volume. Furthermore, maintaining the same outer diameter of the pump tube body 10 from the inlet end 11 to the outlet end 12 facilitates compact pipe arrangement, etc. It should be noted that the buffer chamber 14 is formed by thinning the inner wall of the flow channel 13 near the outlet end 12 of the pump tube body 10. In other words, the buffer chamber 14 and the pump tube body 10 are integrated. By uniformizing the wall thickness variation of the buffer chamber 14, it functions similarly to a "fish bubble" type pulse damper. Please refer to... Figure 3As shown, the number of buffer cavities 14 can be two or more. In this embodiment, the number of buffer cavities 14 is not limited. Setting one buffer cavity 14 can effectively absorb pulse pressure. The specific number can be set according to the actual scenario. Preferably, the buffer cavity 14 and the flow channel 13 are smoothly connected at the internal joint. Through this structural design, when the buffer cavity 14 is integrally formed in the pump tube body 10, there will be no dead corners for cleaning.

[0041] In this embodiment, it should also be noted that the pump tube body 10 is an elastic hose, which has a certain degree of elasticity. Preferably, the elastic hose is made of an elastomer such as silicone or rubber. When rubber is used, a buffer cavity 14 is formed by thinning the inner wall of the flow channel 13 near the liquid outlet 12 of the pump tube body 10 during manufacturing. The elastic modulus of the thinner rubber tube decreases with the decrease in thickness, and its ability to resist deformation weakens. Under the same external force, it is more likely to deform. Therefore, the buffer cavity 14 is more likely to undergo elastic deformation under pulse action, and can effectively absorb pulse pressure, thereby greatly reducing the pulse flow rate, or even achieving a smooth flow.

[0042] Example 2

[0043] Please refer to Figure 4 As shown, the inlet end 11 of the pump tube body 10 can be arranged in parallel to form two or more, thereby realizing the function of two inlets and one outlet or multiple inlets and one outlet.

[0044] Example 3

[0045] Please refer to Figure 5 and Figure 6 As shown, the wall thickness of the buffer cavity 14 is less than the wall thickness of the flow channel 13. This can be achieved by thinning the outer wall of the buffer cavity 14. Therefore, the inner diameter of the pump tube body 10 remains the same from the inlet end 11 to the outlet end 12, while the outer diameter of the buffer cavity 14 is smaller than the outer diameter of the flow channel 13. This is equivalent to setting the inner diameter of the buffer cavity 14 to be equal to the inner diameter of the flow channel 13, but setting the corresponding outer diameter of the buffer cavity 14 to be smaller than the outer diameter of the flow channel 13. In other words, the outer wall of the buffer cavity 14 is thinned, which increases the elasticity of this part of the tube wall. Please refer to... Figure 7 and Figure 8 As shown, the number of buffer cavities 14 can be two or more, and no specific limitation is made in this embodiment.

[0046] In one embodiment, the buffer cavity 14 and the flow channel 13 are connected at their external joints with a smooth transition.

[0047] Example 4

[0048] Please refer to Figure 9As shown, the inlet end 11 of the pump tube body 10 can be arranged in parallel to form two or more, thereby realizing the function of two inlets and one outlet or multiple inlets and one outlet.

[0049] Example 5

[0050] Please refer to Figure 1 and Figure 2 or Figure 5 and Figure 6 As shown, the pump pipe body 10 includes a pump pipe section 15, an inlet clamp section 16, and an outlet clamp section 17. The inlet clamp section 16 is integrally connected to the inlet of the pump pipe section 15, and the outlet clamp section 17 is integrally connected to the outlet of the pump pipe section 15. The internal connection of the pump pipe section 15, the inlet clamp section 16, and the outlet clamp section 17 forms a flow channel 13. The liquid inlet end 11 is located at the inlet of the inlet clamp section 16, the liquid outlet end 12 is located at the outlet of the outlet clamp section 17, and the buffer cavity 14 is located inside the outlet clamp section 17. It should be noted that the pump pipe body 10 is composed of a pump pipe section 15, an inlet clamp section 16, and an outlet clamp section 17, which are integrally connected. Compared with the existing technology where the inlet clamp section 16 and the pump pipe section 15, and the outlet clamp section 17 and the pump pipe section 15 are assembled and spliced ​​separately through joints, resulting in a structure with cleaning dead corners, the pump pipe body 10 in this embodiment integrates different functional sections into one structure with no cleaning dead corners. This eliminates cleaning dead corners in the pipeline, which is beneficial to the cleaning effect and also saves space.

[0051] It should be noted that the buffer cavity 14 installed within the outlet clamp section 17 can be implemented in two ways, such as... Figure 2 As shown, the outer diameter of the pump tube body 10 remains the same from the inlet end 11 to the outlet end 12. The inner diameter of the buffer chamber 14 is larger than the inner diameter of the flow channel 13. That is, the outer diameters of the pump tube section 15, the inlet clamp section 16, and the outlet clamp section 17 are set to be equal, and the inner diameter of the buffer chamber 14 in the outlet clamp section 17 is larger than the inner diameter at other locations. Or as... Figure 6 In this manner, the inner diameter of the pump tube body 10 remains the same from the inlet end 11 to the outlet end 12, and the outer diameter of the buffer cavity 14 is smaller than the outer diameter of the flow channel 13. That is, the inner diameters of the pump tube section 15, the inlet clamp section 16, and the outlet clamp section 17 are set to be equal, and the outer diameter of the buffer cavity 14 in the outlet clamp section 17 is smaller than the outer diameter at other locations.

[0052] Example 6

[0053] Please refer to the following for a peristaltic pump. Figure 10 and Figure 11 As shown, the peristaltic pump 20 includes the aforementioned pump tube, which is used to expel liquid via the squeezing roller 21 of the peristaltic pump 20. Wherein, Figure 10A cross-sectional schematic diagram is shown, showing that the inner diameter of the buffer cavity 14 is larger than the inner diameter of the flow channel 13 and that it employs an inlet clamp section 16 and an outlet clamp section 17. Figure 11 A cross-sectional schematic diagram is shown, showing that the outer diameter of the buffer cavity 14 is smaller than the outer diameter of the flow channel 13 and that it employs an inlet clamp section 16 and an outlet clamp section 17.

[0054] Pump pipe section 15 is mainly used for squeezing by the squeezing roller 21 of peristaltic pump 20; inlet clamp section 16 is connected to pump pipe section 15. On the one hand, it serves as the liquid inlet end 11 for easy liquid inlet. On the other hand, when it is necessary to clamp and stop the liquid inlet of inlet clamp section 16, it can be clamped by external pressure block or other structures to achieve the function of shutting off. Similarly, outlet clamp section 17 is connected to pump pipe section 15. On the one hand, it serves as the liquid outlet end 12 for easy liquid outlet. On the other hand, when it is necessary to clamp and stop the liquid outlet of outlet clamp section 17, it can be clamped by external pressure block or other structures to achieve the function of shutting off. Of course, when the pressure block or other structures clamp the outlet clamp section 17, they can clamp it at the position of the buffer cavity 14 corresponding to the outlet clamp section 17, so that the buffer cavity 14 of pump pipe body 10 and the clamping position are designed in the same position.

[0055] For materials such as juice newly extracted by the peristaltic pump 20, a mixing and stirring function is first performed. Specifically, the outlet clamp section 17 is compressed by external pressure blocks and other structures to achieve a shut-off. Then, the peristaltic pump 20 rotates forward to extract the material. After expanding and forming a negative pressure in the pump tube body 10 for a period of time, the peristaltic pump 20 rotates in reverse to return the material to the original storage device. The peristaltic pump 20 then rotates forward again to extract the material, thereby achieving the stirring function and improving the mixing effect.

[0056] Figure 12 A partial cross-sectional view of a peristaltic pump 20 with two inlet clamp sections 16 is shown. Further, two or more inlet clamp sections 16 are arranged side-by-side, each inlet clamp section 16 being individually connected to a storage device, such as a liquid bag, via an inlet pipe. Therefore, using two or more inlet clamp sections 16 allows for multiple backups and enables the alternating use of the storage devices connected to the inlet pipes, ensuring continuous liquid output. It should be noted here that... Figure 4 Or such as Figure 9 As shown, two inlet clamp sections 16 are arranged side by side, and one outlet clamp section 17 is arranged, realizing a two-inlet-one-outlet function. Depending on the liquid inlet requirements, one inlet clamp section 16 can be clamped or neither can be clamped. Depending on the stirring requirements, the outlet clamp section 17 can be clamped.

[0057] The implementation principle of this embodiment is as follows: Since the peristaltic pump 20 generates a large pulse during normal operation, which affects the output accuracy of the peristaltic pump, it also causes a large splash when the peristaltic pump 20 pumps liquid into the receiving container. Therefore, in this embodiment, a buffer cavity 14 is provided in the flow channel 13 near the liquid outlet 12 of the pump tube body 10. The wall thickness of the buffer cavity 14 is smaller than the wall thickness of the flow channel 13, making it easier to undergo elastic deformation under liquid pressure. The buffer cavity 14 is equivalent to the function of the "fish bubble" type pulse damper in the prior art. When the inner wall of the buffer cavity 14 encounters pulse water, it expands or contracts accordingly, thereby effectively absorbing the pulse pressure, thereby greatly reducing the pulse flow rate, or even achieving a smooth flow. Furthermore, the buffer cavity 14 and the flow channel 13 inside the pump tube body 10 are integrated, which can save space.

[0058] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A pump pipe, characterized in that, include: The pump tube body (10) is provided with an inlet end (11) and an outlet end (12). The inlet end (11) is used to connect to the liquid source, and the outlet end (12) is used to output the liquid flow after passing through the peristaltic pump (20). The pump tube body (10) is provided with a flow channel (13) that connects the liquid inlet end (11) and the liquid outlet end (12) and allows liquid to flow. The pump tube body (10) has a buffer cavity (14) in the flow channel (13) near the liquid outlet (12), and the buffer cavity (14) can undergo elastic deformation under liquid pressure.

2. The pump pipe according to claim 1, characterized in that, In operation, the elastic deformation of the pump tube body (10) at the position of the buffer cavity (14) is greater than that at the position of the flow channel (13).

3. The pump pipe according to claim 2, characterized in that, The wall thickness of the buffer cavity (14) is less than the wall thickness of the flow channel (13).

4. The pump pipe according to claim 3, characterized in that, The outer diameter of the pump tube body (10) remains the same from the inlet end (11) to the outlet end (12); the inner diameter of the buffer cavity (14) is larger than the inner diameter of the flow channel (13).

5. The pump pipe according to claim 4, characterized in that, The internal connection between the buffer cavity (14) and the flow channel (13) is smoothly transitioned.

6. The pump pipe according to claim 3, characterized in that, The inner diameter of the pump tube body (10) remains the same from the inlet end (11) to the outlet end (12); the outer diameter of the buffer cavity (14) is smaller than the outer diameter of the flow channel (13).

7. The pump pipe according to claim 6, characterized in that, The buffer cavity (14) and the flow channel (13) are smoothly connected at their external joints.

8. The pump pipe according to claim 1, characterized in that, The pump tube body (10) is an elastic hose.

9. The pump pipe according to claim 8, characterized in that, The flexible hose is made of materials including rubber or silicone.

10. The pump pipe according to any one of claims 1-9, characterized in that, The pump pipe body (10) includes a pump pipe section (15), an inlet clamp section (16), and an outlet clamp section (17); The inlet clamp section (16) is integrally connected to the inlet of the pump pipe section (15); The outlet clamp section (17) is integrally connected to the outlet of the pump pipe section (15); The liquid inlet end (11) is located at the inlet of the inlet clamp section (16); The liquid outlet end (12) is located at the outlet of the outlet clamp section (17); The buffer cavity (14) is located inside the outlet clamp section (17).

11. The pump pipe according to claim 10, characterized in that, The inlet clamping sections (16) are arranged in two or more parallel configurations, and each of the inlet clamping sections (16) is connected to a storage device individually through a liquid inlet pipe.

12. A peristaltic pump, characterized in that, The peristaltic pump (20) includes a pump tube as described in any one of claims 1-11, the pump tube being squeezed and outputting a liquid flow by the squeeze roller (21) of the peristaltic pump (20).

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