Power system and blood purification equipment

Abstract

The invention is suitable for the field of medical instruments, and discloses a power system and blood purification equipment. The power system comprises a motor, at least two pump assemblies and at least two sets of transmissions. The at least two sets of transmissions correspond to the at least two pump assemblies in a one-to-one mode, and a power output shaft of the motor is connected with power input shafts of the at least two pump assemblies through the at least two sets of transmissions. According to the power system, the input of the number of motors can be reduced, and the cost and price of blood purification equipment can be reduced.

Description

Technical Field

[0001] The present application relates to the field of medical devices, and in particular to a power system and a blood purification device. Background Art

[0002] A blood purification device is a medical device that draws the patient's blood outside the body, purifies the blood outside the body, and then re-injects the purified blood into the human body to achieve the corresponding treatment. The blood purification device can guide the flow of liquid through a pump body installed on it.

[0003] Existing blood purification equipment generally has more than two pump bodies, each pump body is driven by a separate motor. The equipment controls the rotation speed of each motor through the driving circuit, thereby adjusting the rotation speed of the corresponding pump body, and then adjusting the flow rate of the liquid in the corresponding pipeline. Therefore, the blood purification equipment needs to be equipped with a number of motors corresponding to the number of pump bodies, resulting in a high cost of the blood purification equipment. Summary of the invention

[0004] The purpose of the present application is to provide a power system and a blood purification device, which is intended to reduce the cost of the blood purification device.

[0005] To achieve the above objectives, the present application provides a power system for a blood purification device, comprising:

[0006] Motor;

[0007] at least two pump assemblies;

[0008] At least two groups of transmissions are provided, and the at least two groups of transmissions correspond to the at least two pump assemblies one by one. The power output shaft of the motor is connected to the power input shafts of the at least two pump assemblies respectively through the at least two groups of transmissions.

[0009] In the power system of the present application, the transmission includes a continuously variable transmission, the continuously variable transmission includes a driving pulley, a driven pulley and a transmission belt, the transmission belt connects the driving pulley and the driven pulley, the driving pulley is connected to the power output shaft of the motor, and the driven pulley is connected to the power input shaft of the pump assembly;

[0010] The driven pulley includes a first conical wheel disc and a second conical wheel disc, and the second conical wheel disc can move relative to the first conical wheel disc to change the speed ratio of the continuously variable transmission by moving closer to or farther away from the first conical wheel disc.

[0011] In the power system of the present application, the continuously variable transmission further includes a stepper motor, and the stepper motor is connected to the second conical wheel disc to drive the second conical wheel disc to move relative to the first conical wheel disc.

[0012] In the power system of the present application, at least two of the driving pulleys are arranged along the axial direction of the power output shaft of the motor.

[0013] In the power system of the present application, the conveyor belt includes a belt, a rubber belt, a metal belt or a metal chain.

[0014] In the power system of the present application, the pump assembly includes a peristaltic pump.

[0015] The power system of the present application also includes a control unit, which is connected to the motor and at least two groups of the transmissions. The control unit is used to control the rotation rate of the motor and / or the speed ratio of the transmission to adjust the rotation speed of the pump assembly.

[0016] In the power system of the present application, at least two of the pump assemblies are arranged around the motor.

[0017] The present application also provides a blood purification device, comprising a power system as described in any one of the above.

[0018] The blood purification device of the present application further includes a shell, which is provided with a front shell, at least two pump assemblies are installed on the front shell, the power input shaft of the pump assembly extends into the shell, and the motor is arranged in the shell.

[0019] The power system and blood purification equipment provided by the present application can use a single motor to provide power to each pump assembly through a transmission so that each pump assembly can operate. Compared with the structure in which each pump body is equipped with a motor to drive, the power system of the present application can reduce the investment in the number of motors and save the cost of the motor. When the power system is applied to blood purification equipment, it is beneficial to reduce the cost and price of the blood purification equipment. In addition, the motor can adjust the speed of the corresponding pump assembly through the transmission so that each pump assembly can operate at the required speed. In addition, the power system can also reduce the space occupied by the additional motor, and the structure of the power system can be simplified. When the power system is applied to blood purification equipment, the space occupied by the power system for the blood purification equipment can be reduced, and the installation can be completed using the original space of the blood purification equipment without increasing the volume of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0021] Figure 1 It is one of the structural schematic diagrams of the power system provided in the embodiment of the present application;

[0022] Figure 2 This is the second structural schematic diagram of the power system provided in the embodiment of the present application;

[0023] Figure 3 is a structural diagram of power transmission between a motor and one of the pump assemblies of a power system provided in an embodiment of the present application;

[0024] Figure 4 is a power transmission structure diagram of a pump assembly of a power system provided in an embodiment of the present application;

[0025] Figure 5 is a power transmission structure diagram of a motor of a power system provided in an embodiment of the present application;

[0026] Figure 6 is a schematic diagram of the structure of a blood purification device provided in an embodiment of the present application;

[0027] Figure 7 It is a schematic structural diagram of the front shell portion of the blood purification device provided in an embodiment of the present application.

[0028] Description of Figure Numbers:

[0029] 1000: Blood purification equipment;

[0030] 100: Power system;

[0031] 10: Motor; 11: Power output shaft;

[0032] 20: Pump assembly; 21: Power input shaft;

[0033] 30: transmission; 31: driving pulley; 32: transmission belt; 321: contact surface; 33: driven pulley; 331: first conical wheel disc; 332: second conical wheel disc; 34: stepping motor; 341: screw rod;

[0034] 41: first mounting plate; 42: first support column;

[0035] 51: bearing mounting plate; 52: bearing; 53: connecting column; 54: limiting member;

[0036] 61: second mounting plate; 62: second support column;

[0037] 200: housing; 201: front housing. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0040] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or may be indirectly connected to the other element through an intermediate element.

[0041] In addition, the descriptions of "first", "second", etc. in this application are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0042] Blood purification equipment generally has more than two pump bodies. In order to avoid the mutual influence between the operation of multiple pump bodies and ensure that each pump body can operate independently, each pump body is generally driven by a separate motor. The equipment controls the rotation rate of each motor through the driving circuit, thereby adjusting the speed of the corresponding pump body, and then adjusting the flow rate of the liquid in the corresponding pipeline. Since each pump body needs to be equipped with a motor to drive, the number of motors corresponds to the number of pump bodies. However, the price of the motor driving the pump body is generally expensive, resulting in a high cost of blood purification equipment.

[0043] To this end, the embodiments of the present application provide a power system and a blood purification device, which can reduce the investment in the number of motors and help reduce the cost and price of the blood purification device.

[0044] like Figure 1 and Figure 2As shown, the power system 100 provided in the embodiment of the present application is used in a blood purification device 1000 , and the power system 100 includes a motor 10 , at least two pump assemblies 20 , and at least two sets of transmissions 30 .

[0045] Among them, at least two sets of transmissions 30 correspond to at least two pump assemblies 20 one by one, and the power output shaft 11 of the motor 10 is connected to the power input shafts 21 of at least two pump assemblies 20 respectively through at least two sets of transmissions 30.

[0046] The power system 100 of the embodiment of the present application can use a single motor 10, and provide power to each pump assembly 20 through a transmission 30, so that each pump assembly 20 can operate. Compared with the structure in which each pump body is equipped with a motor 10 to drive, the power system 100 of the present application can reduce the input of the number of motors 10, saving the cost of the motor 10. When the power system 100 is applied to the blood purification device 1000, it is beneficial to reduce the cost and price of the blood purification device 1000. In addition, the motor 10 can adjust the speed of the corresponding pump assembly 20 through the transmission 30, so that each pump assembly 20 can operate at the required speed. In addition, the power system 100 can also reduce the space occupied by the additional motor 10, and the structure of the power system 100 can be simplified. When the power system 100 is applied to the blood purification device 1000, the space occupied by the power system 100 for the blood purification device 1000 can be reduced, and the installation can be completed using the original space of the blood purification device 1000, without increasing the volume of the device.

[0047] like Figure 3 As shown, in some embodiments, the transmission 30 includes a continuously variable transmission, which includes a driving pulley 31, a driven pulley 33 and a conveyor belt 32, the conveyor belt 32 connects the driving pulley 31 and the driven pulley 33, the driving pulley 31 is connected to the power output shaft 11 of the motor 10, and the driven pulley 33 is connected to the power input shaft 21 of the pump assembly 20. The continuously variable transmission (CVT transmission) can realize continuous and variable and precise control of the rotation speed of each pump assembly 20, and reduce the noise of the pump assembly 20 during operation, and avoid the phenomenon of low-speed jitter during operation. In the continuously variable transmission given in this embodiment, the motor 10 drives the driving pulley 31 to rotate through the power output shaft 11, the driving pulley 31 drives the conveyor belt 32 to move, and the conveyor belt 32 drives the driven pulley 33 to rotate, thereby driving the power output shaft 11 to rotate, so as to achieve power transmission.

[0048] In the embodiment of the present application, the power system 100 further includes a control unit, which is connected to the motor 10 and at least two sets of transmissions 30, and the control unit is used to control the rotation rate of the motor 10 and / or the speed ratio of the transmission 30 to adjust the rotation speed of the pump assembly 20. When the control unit controls the change of the rotation rate of the motor 10, the rotation speed of at least two pump assemblies 20 connected to the motor 10 will also change accordingly. When the control unit controls the change of the speed ratio of one of the transmissions 30, the rotation speed of the pump assembly 20 connected to the transmission 30 can be changed to achieve independent adjustment of the rotation speed of each pump assembly 20.

[0049] like Figure 3 and Figure 4 As shown, in some embodiments, the driven pulley 33 includes a first conical wheel disc 331 and a second conical wheel disc 332, and the second conical wheel disc 332 can move relative to the first conical wheel disc 331 to change the speed ratio of the continuously variable transmission by approaching or moving away from the first conical wheel disc 331. Specifically, the conical portion of the first conical wheel disc 331 faces the second conical wheel disc 332, and the conical portion of the second conical wheel disc 332 faces the first conical wheel disc 331, and the conveyor belt 32 is placed between the first conical wheel disc 331 and the second conical wheel disc 332. When the second conical wheel disc 332 is relatively close to the first conical wheel disc 331, the width between the first conical wheel disc 331 and the second conical wheel disc 332 becomes narrower, and the conveyor belt 32, pushed by the conical parts of the first conical wheel disc 331 and the second conical wheel disc 332, will expand away from the center of the driven pulley 33, and the contact radius between the conveyor belt 32 and the driven pulley 33 will increase, thereby reducing the speed ratio. When the second conical wheel disc 332 is relatively far away from the first conical wheel disc 331, the width between the first conical wheel disc 331 and the second conical wheel disc 332 becomes wider, and the conveyor belt 32 will shrink toward the center of the driven pulley 33, and the contact radius between the conveyor belt 32 and the driven pulley 33 will decrease, thereby increasing the speed ratio. In this embodiment, the contact position of the tapered portion of the conveyor belt 32 and the driven pulley 33 is changed by changing the spacing between the second tapered wheel 332 and the first tapered wheel 331. During this process, the contact radius of the conveyor belt 32 and the driven pulley 33 gradually changes, thereby achieving stepless speed change, and then achieving continuous speed change of each pump assembly 20, which is beneficial to accurately adjust the flow rate of the liquid in the corresponding pipeline.

[0050] In this embodiment, the transmission is realized by the two sides of the conveyor belt 32 contacting with the conical part of the first conical wheel disc 331 and the conical part of the second conical wheel disc 332. Specifically, it is necessary to ensure that the first conical wheel disc 331 and the second conical wheel disc 332 can clamp the two sides of the conveyor belt 32, so as to ensure that the conveyor belt 32 can stably drive the driven pulley 33 to rotate without sliding relative to the driven pulley 33. In other words, when the spacing between the second conical wheel disc 332 and the first conical wheel disc 331 is large enough, when the two sides of the conveyor belt 32 are not in contact with any one of the conical parts of the first conical wheel disc 331 and the conical parts of the second conical wheel disc 332, the conveyor belt 32 will slide relative to the driven pulley 33, and at this time, the conveyor belt 32 will not drive the driven pulley 33 to rotate, so that the pump assembly 20 connected to the driven pulley 33 can stop running.

[0051] For example, the conveyor belt 32 has contact surfaces 321 on both sides, and the contact surfaces 321 on both sides of the conveyor belt 32 have an included angle, and the included angle is consistent with the included angle between the conical portion of the first conical wheel disc 331 and the conical portion of the second conical wheel. In this way, stable contact transmission between the conveyor belt 32 and the driven pulley 33 can be achieved.

[0052] like Figure 3 and Figure 4 As shown, in some embodiments, the continuously variable transmission further includes a stepper motor 34, which is connected to the second conical wheel disc 332 to drive the second conical wheel disc 332 to move relative to the first conical wheel disc 331. The stepper motor 34 can drive the second conical wheel disc 332 to move relative to the first conical wheel disc 331 along the axial direction of the power input shaft 21 of the pump assembly 20 to change the spacing between the first conical wheel disc 331 and the second conical wheel disc 332 to achieve continuously variable speed change. Exemplarily, the control unit is connected to the stepper motor 34, and the control unit controls the operation of the stepper motor 34 to drive the second conical wheel disc 332 to move relative to the first conical wheel disc 331, thereby controlling and changing the speed ratio of the transmission 30.

[0053] Specifically, the stepper motor 34 is located on the side of the second conical wheel 332 away from the first conical wheel 331, and the stepper motor 34 is provided with a screw rod 341, the end of the screw rod 341 is connected to the adjusting rod, and the adjusting rod is connected to the second conical wheel 332. The stepper motor 34 drives the screw rod 341 to move, thereby driving the adjusting rod and the second conical wheel 332 to move axially to change the spacing between the first conical wheel 331 and the second conical wheel 332.

[0054] In some embodiments, the conveyor belt 32 includes a belt, a rubber belt, a metal belt or a metal chain. In the embodiment of the present application, the conveyor belt 32 is a steel belt.

[0055] like Figure 5As shown, in some embodiments, at least two driving pulleys 31 are arranged along the axial direction of the power output shaft 11 of the motor 10. In this way, the motor 10 can simultaneously drive multiple driving pulleys 31 to rotate through the power output shaft 11, thereby outputting power to multiple pump assemblies 20. The transmission of each driving pulley 31 and the corresponding conveyor belt 32 does not affect each other, and there will be no entanglement or interference between the conveyor belts 32, so as to ensure the stable driving of each pump assembly 20.

[0056] In this embodiment, the driving pulley 31 has an annular groove, and the axial cross-section of the annular groove is an inverted trapezoidal groove to ensure that the annular groove can stably contact the conveyor belt 32 to ensure stable power output. Exemplarily, the angle of the side walls on both sides of the annular groove is consistent with the angle of the contact surface 321 on both sides of the conveyor belt 32, and the conveyor belt 32 contacts the side walls on both sides of the annular groove through the contact surfaces 321 on both sides to achieve power transmission.

[0057] like Figure 5 As shown, in some embodiments, the motor 10 is a brushless DC motor. When the motor 10 is running, the noise of the motor 10 can be reduced and the low-speed jitter phenomenon during the running can be avoided.

[0058] like Figure 5 As shown, in some embodiments, the pump assembly 20 includes a peristaltic pump. The fluid transported by the peristaltic pump only contacts the pump tube but not the pump body, which can meet the requirements of aseptic clean transportation and is particularly suitable for occasions requiring high cleanliness. When the power system 100 is applied to the blood purification device 1000, safety can be improved. At the same time, the peristaltic pump has high precision and can achieve precise control.

[0059] Illustratively, the pump assembly 20 includes a blood pump, a dialysis pump, a plasma pump, and a filtrate pump.

[0060] like Figure 2 As shown, in some embodiments, at least two pump assemblies 20 are arranged around the motor 10. The motor 10 is arranged at the center of the at least two pump assemblies 20 and is surrounded by the at least two pump assemblies 20, so that the space can be fully utilized to arrange the motor 10 and various transmissions 30. In addition, each pump assembly 20 can be as close to the motor 10 as possible, reducing the distance between the motor 10 and the pump assembly 20, which is beneficial for the motor 10 to transmit power to each pump assembly 20.

[0061] like Figure 6 As shown, the embodiment of the present application further provides a blood purification device 1000, including a power system 100. The power system 100 can guide and control the flow of blood and various liquids to achieve corresponding blood purification treatment.

[0062] like Figure 6As shown, in some embodiments, the blood purification device 1000 further includes a housing 200, the housing 200 is provided with a front housing 201, at least two pump assemblies 20 are installed in the front housing 201, the power input shaft 21 of the pump assembly 20 extends into the housing 200, and the motor 10 is arranged in the housing 200. By arranging the pump assembly 20 in the front housing 201, it is convenient for medical staff to operate, for example, the pump assembly 20 and various pipelines are connected at the front housing 201 to achieve blood purification treatment.

[0063] Exemplarily, four pump assemblies 20 are provided. The four pump assemblies 20 are respectively a blood pump, a dialysis pump, a plasma pump and a filtrate pump. The motor 10 is located at the center of the four pump assemblies 20.

[0064] like Figure 1 and Figure 7 As shown, in some embodiments, a first mounting plate 41 is provided in the housing 200, and the motor 10 is fixed on the first mounting plate 41. The first mounting plate 41 is connected to the inner side of the front housing 201 through a plurality of first pillars 42, for example, connected to the inner side of the front housing 201 through four first pillars 42, so that the motor 10 is stably mounted in the housing 200. The power output shaft 11 of the motor 10 extends through the first mounting plate 41 toward one side of the front housing 201. In this way, the power output shaft 11 of the motor 10 can be arranged relative to the power input shaft 21 of the pump assembly 20 in the radial direction, so that the power output shaft 11 of the motor 10 is connected to the power input shaft 21 of the pump assembly 20 through the transmission 30. Specifically, the driving pulley 31, the transmission belt 32 and the driven pulley 33 can be located between the first mounting plate 41 and the front housing 201 to facilitate the connection of power transmission.

[0065] like Figure 1 and Figure 7 As shown, in some embodiments, a bearing mounting plate 51 is provided in the housing 200, and a bearing 52 is fixed to the bearing mounting plate 51. The bearing mounting plate 51 is connected to the inner side of the pump assembly 20 through a plurality of connecting columns 53. For example, it is connected to the inner side of the front housing 201 through four connecting columns 53 to stably install the bearing 52. The power input shaft 21 of the pump assembly 20 passes through the bearing mounting plate 51 and is fixedly connected to the inner ring of the bearing 52 to ensure the stable rotation of the power input shaft 21 of the pump assembly 20.

[0066] Exemplarily, a stopper 54 is further provided on the inner side of the pump assembly 20, and the stopper 54 is used to limit the installation position of the bearing mounting plate 51, so as to prevent the bearing mounting plate 51 from being too close to the pump assembly 20, and ensure the stable rotation of the power input shaft 21 of the pump assembly 20. Furthermore, the stopper 54 is a detection board for detecting the pump speed of the pump assembly 20.

[0067] like Figure 1 and Figure 7 As shown, in some embodiments, a second mounting plate 61 is further provided in the housing 200, and the stepper motor 34 is fixed on the second mounting plate 61. The second mounting plate 61 is connected to the inner side of the bearing mounting plate 51 away from the pump assembly 20 through a plurality of second pillars 62, for example, connected to the inner side of the bearing mounting plate 51 away from the pump assembly 20 through four second pillars 62, so that the stepper motor 34 is stably installed in the housing 200. The screw rod 341 of the stepper motor 34 passes through the second mounting plate 61 to stably connect the second conical wheel disc 332, and then the second conical wheel disc 332 can be driven by the screw rod 341 to move closer to or away from the first conical wheel disc 331 for linear motion.

[0068] In the embodiment of the present application, compared with the motor 10 with a unit price of 3,000-8,000 yuan, the components such as the driving pulley 31, the driven pulley 33, the conveyor belt 32, the stepper motor 34 in the transmission 30 have lower costs, among which the price cost of the stepper motor 34 is about 400 yuan, and the price costs of the remaining components are about 200 yuan in total. Therefore, the investment in the number of motors 10 is reduced, the cost of additional motors 10 can be saved, and the cost of the power system 100 is greatly reduced, which is conducive to reducing the cost and price of the blood purification equipment 1000.

[0069] The above description is only a preferred embodiment of the present application, and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the application concept of the present application, or directly / indirectly used in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A power system for a blood purification device, characterized in that: include: Motor; at least two pump assemblies; At least two groups of transmissions are provided, and the at least two groups of transmissions correspond to the at least two pump assemblies one by one. The power output shaft of the motor is connected to the power input shafts of the at least two pump assemblies respectively through the at least two groups of transmissions.

2. The power system according to claim 1, characterized in that: The transmission comprises a continuously variable transmission, the continuously variable transmission comprises a driving pulley, a driven pulley and a transmission belt, the transmission belt connects the driving pulley and the driven pulley, the driving pulley is connected to the power output shaft of the motor, and the driven pulley is connected to the power input shaft of the pump assembly; The driven pulley includes a first conical wheel disc and a second conical wheel disc, and the second conical wheel disc can move relative to the first conical wheel disc to change the speed ratio of the continuously variable transmission by moving closer to or farther away from the first conical wheel disc.

3. The power system according to claim 2, characterized in that: The continuously variable transmission further includes a stepping motor, which is connected to the second conical wheel disc to drive the second conical wheel disc to move relative to the first conical wheel disc.

4. The power system according to claim 2, characterized in that: At least two of the driving pulleys are arranged along the axial direction of the power output shaft of the motor.

5. The power system according to claim 2, characterized in that: The conveyor belt includes a belt, a rubber belt, a metal belt or a metal chain.

6. The power system according to claim 1, characterized in that: The pump assembly includes a peristaltic pump.

7. The power system according to claim 1, characterized in that: It also includes a control unit, which is connected to the motor and at least two sets of the transmissions, and is used to control the rotation speed of the motor and / or the speed ratio of the transmission to adjust the rotation speed of the pump assembly.

8. The power system according to claim 1, characterized in that: At least two of the pump assemblies are arranged around the motor.

9. A blood purification device, characterized in that: Comprising a power system as claimed in any one of claims 1 to 8.

10. The blood purification device according to claim 9, characterized in that: It also includes a shell, the shell is provided with a front shell, at least two pump assemblies are installed on the front shell, the power input shaft of the pump assembly extends into the shell, and the motor is arranged in the shell.

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