Peristaltic pump and constant-temperature injection system

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a peristaltic pump and a constant-temperature injection system.The peristaltic pump is characterized in that an extrusion inner cavity is formed in a pump shell, an extrusion assembly is rotatably arranged in the extrusion inner cavity, and meanwhile a hose is arranged in the extrusion inner cavity and located between the extrusion assembly and the inner wall of the extrusion inner cavity; according to the peristaltic pump, the heating stroke corresponding to the extrusion heating section is arranged in the extrusion inner cavity, the pump shell or the extrusion assembly is provided with the heating device, liquid in the extrusion heating section is heated in the heating stroke, the liquid in the hose is heated in the liquid conveying process of the peristaltic pump, additional heating equipment does not need to be added, and the heating efficiency is improved. Therefore, the liquid in the hose can be heated, the requirement for the flushing operation of the heated liquid is met, and the cost and investment of heating equipment are saved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a peristaltic pump and a constant temperature injection system. Background Art

[0002] The water injection pump is an auxiliary device used in conjunction with surgical treatment. It delivers water into the body, lumen, body cavity or body cavity to flush the tissue to remove blood, excrement and other organic matter in order to improve the visibility of diagnosis and treatment during the diagnosis and treatment process.

[0003] At present, the water injection pumps used in clinical practice all use peristaltic pumps to pressurize and deliver sterile liquid to the wound surface to complete the wound cleaning. In some surgeries, the injected sterile liquid needs to be close to the patient's body temperature. Liquid at room temperature will cause muscle contraction, which is not conducive to the operation.

[0004] The endoscopic water delivery devices currently used in clinical practice do not have a heating function. During surgery, the sterile liquid needs to be heated in a water bath in advance and then pumped in through a water injection pump. However, the initial temperature of the hot water used in the water bath is difficult to control. As the water temperature decreases, the temperature of the sterile liquid also fluctuates, affecting the surgical effect.

[0005] Chinese patent document CN222102246U (202420718248.0) discloses a temperature-controllable animal perfusion peristaltic pump, which uses a thermostatic heating device that can be extended and retracted on one end of the hose to keep the perfused solution at a constant temperature when it enters the animal or organ. The above peristaltic pump needs to use an external thermostatic heating device to heat the liquid inside the hose, which has certain requirements on the model and structure of the thermostatic heating device, cannot meet all models of hoses, and needs to use an external thermostatic heating device, which increases the equipment cost. Summary of the invention

[0006] The purpose of the present invention is to design a peristaltic pump and a constant temperature injection system, which enables the peristaltic pump to heat the liquid during the process of conveying the liquid, and then be used for constant temperature control of the liquid used for clinical surgical flushing, effectively reducing the cost investment of the heating equipment.

[0007] The technical problem to be solved by the present invention is achieved by adopting the following technical solution: a peristaltic pump comprises a pump housing, an extrusion assembly and a hose;

[0008] An extrusion cavity is provided in the pump housing, the extrusion assembly is rotatably provided in the extrusion cavity, and the hose is provided in the extrusion cavity and located between the extrusion assembly and the inner wall of the extrusion cavity;

[0009] The hose comprises an extrusion heating section and liquid inlets and outlets located at both ends of the extrusion heating section;

[0010] The extrusion inner cavity is provided with a heating stroke corresponding to the extrusion heating section, and the pump housing or the extrusion assembly is provided with a heating device to heat the liquid in the extrusion heating section during the heating stroke.

[0011] Preferably, the extrusion heating section is flat. Since the extrusion water delivery stroke of the peristaltic pump is short, by designing the extrusion heating section to be flat, the liquid passes through the flat pipe, the contact area between the outer wall of the hose and the heating component is increased, and the liquid in the pipe is heated at the same rate, thereby achieving rapid heating of the liquid in the hose within a short heating stroke.

[0012] Preferably, the inner wall of the pump housing corresponding to the heating stroke is a support surface, and the support surface has a heating function. In a peristaltic pump, the support surface is usually in contact with the hose, and the support surface is set to have a heating function to achieve real-time heating of the liquid in the extrusion heating section.

[0013] Preferably, the extrusion assembly includes a rotating bracket and rollers evenly arranged around the center of the rotating bracket;

[0014] More than three rollers are rotatably arranged on the rotating bracket. The extrusion assembly is provided with more than three rollers, and through the extrusion of the rollers, the outer surface of the extrusion heating section of the hose is kept in close contact with the extrusion inner cavity, so as to ensure that the liquid in the hose is heated evenly, and the liquid in the hose is heated in sections, which makes it easier to control the heating efficiency.

[0015] Preferably, the extrusion assembly includes an extrusion shaft and a plurality of extrusion protrusions uniformly arranged along the circumference of the extrusion shaft;

[0016] The outer wall of the extrusion shaft and the inner wall of the extrusion inner cavity are both in contact with the outer wall of the extrusion heating section, and the extrusion protrusion is an arc-shaped structure higher than the outer wall of the extrusion shaft. The outer wall of the extrusion shaft and the inner wall of the extrusion inner cavity are both in contact with the outer wall of the extrusion heating section, thereby supporting the hose and ensuring that the outer surface of the extrusion heating section of the hose is in close contact with the extrusion inner cavity. The extrusion protrusion with an arc-shaped structure is used to squeeze the liquid in the hose to achieve the purpose of conveying the liquid.

[0017] Preferably, the number of the extrusion protrusions is three or more. The number of the extrusion protrusions is three or more to meet the requirement of a larger flow rate and to achieve segmented heating of the liquid in the hose, making it easier to control the liquid heating efficiency and the uniformity of the liquid temperature.

[0018] Preferably, the present invention further comprises a first heating tube and a slip ring, wherein the first heating tube is arranged in the extrusion shaft and the first heating tube is evenly distributed along the circumference of the extrusion shaft;

[0019] The first heating tube is connected to the power supply through a slip ring. In order to realize the heating function of the extrusion shaft during rotation, the first heating tube in the extrusion shaft is connected to the power supply through a slip ring, so that the first heating tube can be continuously powered during the rotation of the extrusion shaft.

[0020] Preferably, the space between the two extrusion protrusions forms an extrusion heating unit, and the liquid in the extrusion heating unit is heated to a preset temperature in the extrusion heating section. The space between the two extrusion protrusions forms an extrusion heating unit, so that the extrusion protrusion, the extrusion shaft and the support surface heat the liquid in the extrusion heating unit at the same time, further improving the heating efficiency.

[0021] Preferably, the present invention further comprises a second heating tube embedded in the pump housing, wherein the second heating tubes are arranged at intervals along the heating stroke direction. By arranging the second heating tube in the pump housing, the support surface has a heating function.

[0022] The present invention also discloses a constant temperature injection system, comprising the above-mentioned peristaltic pump, a rotary drive device, a temperature sensor and a control system;

[0023] The rotary drive device is connected to the extrusion assembly;

[0024] The rotary drive device, the heating device and the temperature sensor are electrically connected to the control system respectively;

[0025] The temperature sensor is used to detect the temperature of the pump housing or the temperature of the extrusion component;

[0026] The control system controls the start and stop of the heating device according to the temperature detected by the temperature sensor. This constant temperature injection system uses a temperature sensor to detect the temperature of the pump housing or the temperature of the extrusion component. The control system controls the start and stop of the heating device according to the temperature detected by the temperature sensor to achieve a preset temperature and realize constant temperature control.

[0027] Compared with the prior art, the beneficial effects of the present invention are as follows: the peristaltic pump of the present invention is provided with an extrusion cavity in the pump housing, and the extrusion component is rotatably arranged in the extrusion cavity, and the hose is arranged in the extrusion cavity and is located between the extrusion component and the inner wall of the extrusion cavity. The present invention is provided with a heating stroke corresponding to the extrusion heating section in the extrusion cavity, and the pump housing or the extrusion component is provided with a heating device, and the liquid in the extrusion heating section is heated in the heating stroke. The peristaltic pump realizes the heating of the liquid in the hose during the process of conveying the liquid. There is no need to add additional heating equipment to heat the liquid in the hose, which meets the requirements of the operation requiring heated liquid flushing, saves the cost and investment of the heating equipment, and also realizes the sterile isolation heating and conveying of the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the structure of the peristaltic pump described in Example 1 of the present invention;

[0029] Figure 2 This is a schematic diagram of the structure of the peristaltic pump described in Example 2 of the present invention;

[0030] Figure 3 It is a stereoscopic diagram of the peristaltic pump described in Example 2 of the present invention;

[0031] Figure 4 It is a front view of the constant temperature injection system of the present invention;

[0032] Figure 5 It is a structural schematic diagram of the constant temperature injection system of the present invention;

[0033] Figure 6 This is the circuit diagram of the control system;

[0034] In the figure, 1 pump housing, 2 extrusion assembly, 3 hose;

[0035] 100 extrusion inner cavity, 200 extrusion heating unit;

[0036] 31 extrusion heating section, 32 liquid inlet and outlet;

[0037] 4 support surface;

[0038] 21 rotating bracket, 22 roller;

[0039] 23 extrusion shaft, 24 extrusion protrusion;

[0040] 5 first heating tube, 6 slip ring, 7 second heating tube, 8 rotation drive device, 9 temperature sensor, 10 control system, 11 power module, 12 display unit. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings.

[0042] Example 1

[0043] like Figure 1 As shown, a peristaltic pump comprises a pump housing 1, an extrusion assembly 2 and a hose 3. In this embodiment, the pump housing 1 is made of a heat-conducting material, preferably a metal material. The hose 3 is made of a silicone material.

[0044] An extrusion cavity 100 is disposed in the pump housing 1 , the extrusion assembly 2 is rotatably disposed in the extrusion cavity 100 , and the hose 3 is disposed in the extrusion cavity 100 and located between the extrusion assembly 2 and the inner wall of the extrusion cavity 100 .

[0045] The hose 3 includes an extrusion heating section 31 and liquid inlets and outlets 32 located at two ends of the extrusion heating section 31 .

[0046] The extrusion inner cavity 100 is provided with a heating stroke corresponding to the extrusion heating section 31 , and the pump housing 1 is provided with a heating device to heat the liquid in the extrusion heating section 31 in the heating stroke.

[0047] The extrusion heating section 31 is flat, and the extrusion inner cavity 100 matches the shape of the extrusion heating section 31. The extrusion component 2 is lengthened in the axial direction. Compared with the extrusion component of the existing peristaltic pump, the extrusion component 2 is also lengthened in the axial direction. Specifically, the extrusion heating section 31 is a flat tube, specifically a widened silicone tube, which increases the heat exchange surface to improve the heating efficiency. The liquid inlet and outlet 32 ​​is a round tube. In the cross-sectional direction, the length of the inner cavity of the extrusion heating section 31 is greater than the inner diameter of the liquid inlet and outlet 32, and the width of the inner cavity of the extrusion heating section 31 is less than the inner diameter of the liquid inlet and outlet 32. The purpose is to spread the liquid input from the liquid inlet and outlet 32 ​​so that the liquid in the extrusion heating section 31 can be heated evenly and quickly, so as to realize liquid transportation within a shorter stroke of the peristaltic pump while heating the liquid to a preset temperature. Since the normal body temperature of the human body is usually 37°C, the heat required to heat the liquid at room temperature to 37°C is also less. Furthermore, the inner diameter of the pipe at the input end of the peristaltic pump is greater than or equal to the inner diameter of the hose 3. In the present invention, the input liquid is spread out in the extrusion heating section 31 and heated to a set temperature before being transported to the application end.

[0048] The inner wall of the pump housing 1 corresponding to the heating stroke is a support surface 4, and the support surface 4 has a heating function. The support surface 4 is used to support the extrusion heating section 31 of the hose 3. Since the support surface 4 has a heating function, the liquid in the hose 3 can be heated synchronously by heat conduction during the process of the hose 3 conveying the liquid.

[0049] Specifically, the peristaltic pump further includes a second heating tube 7 embedded in the pump housing 1, and the second heating tubes 7 are spaced apart from each other along the heating stroke direction to ensure uniform temperature distribution at various locations on the inner wall of the pump housing 1, which is beneficial for accurately controlling the heating rate and heating effect of the liquid in the hose 3. In this embodiment, the second heating tube 7 is an electric heating tube.

[0050] The extrusion assembly 2 includes a rotating bracket 21 and rollers 22 evenly arranged around the center of the rotating bracket 21 .

[0051] More than three rollers 22 are rotatably arranged on the rotating bracket 21. The rollers 22 help to reduce the wear of the hose 3 during the liquid conveying process and increase the service life of the hose 3.

[0052] like Figure 4and Figure 5 As shown, a constant temperature injection system includes the peristaltic pump mentioned above, and also includes a rotary drive device 8, a temperature sensor 9 and a control system 10.

[0053] The rotary drive device 8 is connected to the extrusion assembly 2. Specifically, the rotary drive device 8 is a motor, and the rotary shaft of the motor is connected to the rotary bracket 21.

[0054] The rotary drive device 8, the heating device and the temperature sensor 9 are electrically connected to the control system respectively.

[0055] The temperature sensor 9 is used to detect the temperature of the pump housing 1. In this embodiment, the temperature sensor 9 is embedded in the pump housing 1 and is used to detect the temperature of the pump housing 1 in real time to ensure the heating efficiency of the liquid in the hose 3.

[0056] The control system controls the start and stop of the heating device according to the temperature detected by the temperature sensor.

[0057] like Figure 5 As shown, the controller used in the constant temperature injection system includes a rotation drive device 8, a control system 10, a power module 11 and a display unit 12.

[0058] The power module 11 converts the input 220V AC power into the DC power required by the device, and the display unit 12 is used for human-machine parameter interaction and device status display.

[0059] The rotation driving device 8 is connected to the peristaltic pump and is used to drive the peristaltic pump to rotate. The rotation driving device 8 is a motor.

[0060] One liquid inlet and outlet 32 ​​of the hose 3 is connected to a liquid storage tank for providing sterile liquid, and the other liquid inlet and outlet 32 ​​is connected to an endoscope.

[0061] The control system 10 is the core control unit of the equipment, which is mainly responsible for logic control and realizing constant temperature control of the heating unit. The main functions realized are to complete the user parameter setting of the display interface, control the speed and start and stop of the peristaltic pump, and handle system abnormal signals.

[0062] The control system 10 includes a heating control unit and a logic control unit. Figure 6 As shown, J7 of the heating control unit is connected to the power supply of the isolation heating device, and J8 is connected to the temperature signal of the peristaltic pump. The collected real-time temperature will be calculated according to the user set value, and the heating power of the isolation heating device will be controlled according to the calculation result. The heating power of the heating device will be adjusted according to the pre-adjusted PID parameters to make the liquid temperature reach the set temperature.

[0063] The logic control unit controls the operation of the equipment. The flow rate and expected temperature can be adjusted through the display screen. When the operation signal is detected, the peristaltic pump is controlled to start running.

[0064] In this embodiment, the electric heating tube in the pump housing 1 is used to convert electrical energy into thermal energy; the temperature sensor is used to detect the temperature of the pump housing 1 and feed it back to the heating control unit, and the heating control unit controls the power of the electric heating tube according to the set temperature; the hose 3 converts the heat emitted by the electric heating tube into the sterile liquid to achieve heating of the liquid.

[0065] Example 2

[0066] like Figure 2 and Figure 3 As shown, the difference from Example 1 is that the extrusion assembly 2 is provided with a heating device to heat the liquid in the extrusion heating section 31 during the heating stroke.

[0067] Specifically, the extrusion assembly 2 includes an extrusion shaft 23 and a plurality of extrusion protrusions 24 uniformly arranged along the circumference of the extrusion shaft 23 .

[0068] The outer wall of the extrusion shaft 23 and the inner wall of the extrusion inner cavity 100 are both in contact with the outer wall of the extrusion heating section 31 , and the extrusion protrusion 24 is an arc-shaped structure higher than the outer wall of the extrusion shaft 23 .

[0069] The number of the extrusion protrusions 24 is more than three.

[0070] The peristaltic pump further comprises a first heating tube 5 and a slip ring 6. The first heating tube 5 is arranged in the extrusion shaft 23, and the first heating tube 5 is evenly distributed along the circumference of the extrusion shaft 23. In this embodiment, the first heating tube 5 is an electric heating tube.

[0071] The first heating tube 5 is connected to the power supply via a slip ring 6. In this embodiment, the motor shaft of the motor is connected to the extrusion shaft 23 via a slip ring 6.

[0072] The space between the two extrusion protrusions 24 forms an extrusion heating unit 200 , and the liquid in the extrusion heating unit 200 is heated to a preset temperature in the extrusion heating section 31 .

[0073] In this embodiment, the temperature sensor 9 is used to detect the temperature of the pump housing 1 or the temperature of the extrusion assembly 2. The temperature sensor 9 is embedded in the pump housing 1 and the extrusion shaft 23 to detect the temperature of the pump housing 1 and the extrusion shaft 23 in real time to ensure the heating efficiency of the liquid in the hose 3.

[0074] In this embodiment, the slip ring 6 is used to connect the heating control unit and the heating device, and is mainly used to connect the electric heating tube and the temperature sensor; the electric heating tube is used to convert electrical energy into thermal energy; the temperature sensor is used to detect the temperature of the pump housing 1 or the temperature of the extrusion assembly 2 and feed it back to the heating control unit, and the heating control unit controls the power of the electric heating tube according to the set temperature; the hose converts the heat emitted by the electric heating tube into the sterile liquid to achieve heating of the liquid.

Claims

1. A peristaltic pump, characterized in that: It comprises a pump housing (1), an extrusion assembly (2) and a hose (3); An extrusion cavity (100) is provided in the pump housing (1), the extrusion assembly (2) is rotatably arranged in the extrusion cavity (100), and the hose (3) is arranged in the extrusion cavity (100) and is located between the extrusion assembly (2) and the inner wall of the extrusion cavity (100); The hose (3) comprises an extrusion heating section (31) and liquid inlets and outlets (32) located at both ends of the extrusion heating section (31); The extrusion inner cavity (100) is provided with a heating stroke corresponding to the extrusion heating section (31), and the pump housing (1) or the extrusion assembly (2) is provided with a heating device for heating the liquid in the extrusion heating section (31) during the heating stroke.

2. The peristaltic pump according to claim 1, characterized in that: The extrusion heating section (31) is flat.

3. The peristaltic pump according to claim 1, characterized in that: The inner wall of the pump housing (1) corresponding to the heating stroke is a support surface (4), and the support surface (4) has a heating function.

4. The peristaltic pump according to claim 3, characterized in that: The extrusion assembly (2) comprises a rotating bracket (21) and rollers (22) evenly arranged around the center of the rotating bracket (21); More than three rollers (22) are rotatably arranged on the rotating bracket (21).

5. The peristaltic pump according to claim 1, characterized in that: The extrusion assembly (2) comprises an extrusion shaft (23) and a plurality of extrusion protrusions (24) uniformly arranged along the circumference of the extrusion shaft (23); The outer wall of the extrusion shaft (23) and the inner wall of the extrusion inner cavity (100) are both in contact with the outer wall of the extrusion heating section (31), and the extrusion protrusion (24) is an arc-shaped structure higher than the outer wall of the extrusion shaft (23).

6. The peristaltic pump according to claim 5, characterized in that: The number of the extrusion protrusions (24) is three or more.

7. The peristaltic pump according to claim 5, characterized in that: It also includes a first heating tube (5) and a slip ring (6), wherein the first heating tube (5) is arranged inside the extrusion shaft (23), and the first heating tube (5) is evenly distributed along the circumference of the extrusion shaft (23); The first heating tube (5) is connected to a power supply via a slip ring (6).

8. The peristaltic pump according to claim 7, characterized in that: The space between the two extrusion protrusions (24) forms an extrusion heating unit (200), and the liquid in the extrusion heating unit (200) is heated to a preset temperature in the extrusion heating section (31).

9. The peristaltic pump according to claim 1 or 3, characterized in that: It also comprises a second heating tube (7) embedded in the pump housing (1), wherein the second heating tubes (7) are arranged at intervals from each other along the heating stroke direction.

10. A constant temperature injection system, comprising the peristaltic pump according to any one of claims 1 to 9, characterized in that: It also includes rotary drive equipment, temperature sensors and control systems; The rotary drive device is connected to the extrusion assembly (2); The rotary drive device, the heating device and the temperature sensor are electrically connected to the control system respectively; The temperature sensor is used to detect the temperature of the pump housing (1) or the temperature of the extrusion component (2); The control system controls the start and stop of the heating device according to the temperature detected by the temperature sensor.

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