CN110584723B

CN110584723B - Rotary cutting system

Info

Publication number: CN110584723B
Application number: CN201910885010.0A
Authority: CN
Inventors: 袁征; 孔凡斌; 温潇溢; 孙晓安
Original assignee: Shanghai Xiuneng Medical Equipment Co ltd
Current assignee: Shanghai Xiuneng Medical Equipment Co ltd
Priority date: 2019-09-19
Filing date: 2019-09-19
Publication date: 2022-04-26
Anticipated expiration: 2039-09-19
Also published as: CN110584723A

Abstract

The invention discloses a rotary cutting system, and relates to the field of medical equipment. The method comprises the following steps: the waste liquid tank comprises a main body, wherein a liquid level opening is formed in the main body, and a waste liquid barrel is arranged at the liquid level opening; the main body is provided with a connecting opening, the connecting opening is connected with a rotary cutting assembly, and the rotary cutting assembly is connected with the waste liquid barrel through an air pipe; the main body is provided with a pipeline control system for controlling the air pipe; the rotary cutting assembly comprises a shell, a rotary cutting rod is arranged in the shell, a rotary cutter is sleeved on the rotary cutting rod, the rotary cutter is arranged on the rotary cutting rod in a sliding mode along the axis direction of the rotary cutting rod, and the rotary cutter is connected to the rotary cutting rod in a rotating mode along the axis direction of the rotary cutting rod; the shell is provided with a rotating component for driving the rotary cutter to rotate and a sliding component for driving the rotary cutter to slide; the main body is also provided with a rotation control system electrically connected with the rotating assembly and a sliding control system electrically connected with the sliding assembly. The possibility of generating an undercut or incomplete sampling is reduced, the working efficiency of medical personnel is increased, and the pain of patients is reduced.

Description

Rotary cutting system

Technical Field

The invention relates to the field of medical equipment, in particular to a rotary cutting system.

Background

With the rapid increase in the incidence of breast disease, biopsy systems are often used to help patients determine whether cells in the examined area are cancerous. Hospitals typically use rotational atherectomy systems to repeatedly dissect suspicious lesions and store them in a sample collection device by vacuum aspiration to obtain histological specimens of the breast.

At present, the rotary cutter in the existing rotary cutting system usually realizes the advance and retreat of the rotary cutter and the rotary cutting of the rotary cutter through timing control, a motor works in constant time, and the rotary cutter only works according to the preset time no matter whether the rotary cutter reaches a preset position or whether the rotary cutter obtains a sufficient sample, so that the problem that the rotary cutter is inaccurately positioned in the rotary mammary gland cutting sampling process is caused, the possibility of idle cutting or incomplete sampling is easily generated, the working efficiency of medical personnel is reduced, and the pain of the patient is increased.

Disclosure of Invention

The rotary cutting system provided by the invention has the advantages that the positioning precision of the rotary cutter in the rotary cutting sampling process of mammary glands is increased, the possibility of generating idle cutting or incomplete sampling is reduced, the working efficiency of medical personnel is increased, and the pain of patients is reduced.

The technical scheme provided by the invention is as follows:

an rotational atherectomy system, comprising: the waste liquid tank comprises a main body, wherein a liquid level opening is formed in the main body, and a waste liquid barrel is arranged at the liquid level opening; the main body is provided with a connecting opening, the connecting opening is connected with a rotary cutting assembly, and the rotary cutting assembly is connected with the waste liquid barrel through an air pipe; the main body is provided with a pipeline control system for controlling the air pipe; the rotary cutting assembly comprises a shell, a rotary cutting rod is arranged in the shell, a rotary cutter is sleeved on the rotary cutting rod, the rotary cutter is arranged on the rotary cutting rod in a sliding mode along the axis direction of the rotary cutting rod, and the rotary cutter is connected to the rotary cutting rod in a rotating mode along the axis direction of the rotary cutting rod; the shell is provided with a rotating assembly for driving the rotary cutter to rotate and a sliding assembly for driving the rotary cutter to slide; the main body is also provided with a rotation control system electrically connected with the rotating assembly and a sliding control system electrically connected with the sliding assembly.

In the technical scheme, the rotary control system can control the action of the rotary assembly through the arrangement of the rotary control system and the rotary assembly, so that the control of the rotary cutter in the rotating direction is realized, and the action of the rotary cutter in the rotating direction is reduced; the control of the rotary cutter in the sliding direction can be realized through the arrangement of the sliding control system and the sliding assembly; and the pipeline control system effectively controls the pressure of the trachea connected to the rotary-cut assembly, realizes the negative pressure cutting environment of the rotary-cut assembly, increases the positioning precision of the rotary-cut cutter in the rotary-cut sampling process of the mammary gland, reduces the possibility of generating idle cutting or incomplete sampling, increases the working efficiency of medical personnel and reduces the pain of patients.

Further, the sliding component comprises a sliding rod, a sliding block and a sliding driving device; the axis of the sliding rod is parallel to the axis of the rotary cutting rod; the sliding block is arranged on the sliding rod in a sliding mode along the axial direction of the sliding rod, and the sliding block is connected to the rotary cutter and used for driving the rotary cutter to slide along the axial direction of the rotary cutting rod; the sliding driving device is used for driving the sliding block to slide along the axial direction of the sliding rod; at least one end of the sliding rod is provided with a positioning component used for abutting of the sliding block.

In the technical scheme, when the sliding block is close to one end of the rotary cutting rod with the positioning component, the sliding block can abut against the positioning component, the sliding block stops sliding continuously, then the rotary cutter stops sliding, the position of the sliding block when sliding is limited through the arrangement of the positioning component, the position that the rotary cutter can reach is limited, the possibility that the rotary cutter reaches the position inaccurately is reduced, the possibility that the rotary cutter is positioned inaccurately in the rotary-cut mammary gland sampling process is reduced, the possibility that an empty cut or an incomplete sampling is reduced, the working efficiency of medical staff is increased, and the pain of patients is reduced.

Further, the rotary cutting rod is an air pipe.

Among this technical scheme, because the sample that obtains after the rotary-cut needs to pass through the trachea in the rotary-cut sample process takes out, when regard rotary-cut pole as the trachea, the rotary-cut pipe can be used for taking a sample simultaneously and be used for sliding of rotary-cut sword, has reduced the inside required space of shell, and the medical personnel of being convenient for operate.

Further, the rotary cutter is provided with a connecting block, the sliding block is provided with a butt joint groove used for butting against the connecting block, and the butt joint groove penetrates through the sliding block along the direction perpendicular to the axis of the sliding rod.

In the technical scheme, through the arrangement of the connecting block and the abutting groove, when the sliding block needs to drive the rotary cutter to slide, a user can rotate the connecting block into the spiral groove, and when the sliding block slides, the inner wall of the abutting groove can abut against the connecting block, so that the rotary cutter is driven to slide; when the abutting groove penetrates through the sliding block along the axial direction perpendicular to the sliding rod, the connecting block can stably enter or separate from the abutting groove, and the possibility of interference between the connecting block and the sliding block is reduced.

Further, the rotating assembly comprises a rotating gear, the axis of the rotating gear is parallel to the axis of the rotary cutting rod, and the connecting block is a gear meshed with the rotating gear; the rotating assembly further comprises a rotating driving device for driving the rotating gear to rotate.

Among this technical scheme, through the setting of running gear to and set up the connecting block into the gear with running gear meshing, can realize that the runner assembly drives the effect of rotary cutter pivoted.

Further, the rotation control system includes: the rotation driving circuit is electrically connected with the wiring terminal of the rotation assembly; the rotating component is driven to be in an opening or closing state; the current sampling circuit is electrically connected with the wiring terminal of the rotating assembly; the rotating current signal is used for detecting the rotating assembly; the signal processing circuit is electrically connected with the current sampling circuit; the device is used for amplifying and filtering the rotation current signal; the microprocessor is electrically connected with the rotation driving circuit and the signal processing circuit respectively; and the rotation driving circuit is used for receiving the rotation current signal processed by the signal processing circuit and outputting a rotation driving signal to the rotation driving circuit according to the rotation circuit signal.

In the technical scheme, the motor is driven to be in an opening or closing state by the motor driving circuit; the motor drives the inner cutter of the rotary cutter to carry out rotary cutting and sampling; if calcified tissues are encountered, the resistance of the calcified tissues is increased, the load of the motor is increased, and the motor current signals acquired by the current sampling circuit are amplified and filtered by the signal processing circuit and then fed back to the microprocessor; the microprocessor recognizes that the motor current rises and the motor rotating speed can drop; the output torque of the motor is increased, so that the rotating speed of the motor is guaranteed, the cutting efficiency is improved, and the phenomenon of immobility of cutting is avoided.

Further, the rotation drive circuit includes: the first rotation driving sub-circuit and the second rotation driving sub-circuit are electrically connected with the terminal of the rotation assembly and are used for driving the rotation assembly to be in an opening or closing state according to different duty ratio voltage signals provided by the microprocessor; the first rotation driving sub-circuit includes: one input end of the first driving chip is connected with the microprocessor through a resistor R101; two output ends of the first driving chip are connected with a wiring end of the rotating assembly; a wiring terminal of the rotating assembly is also connected with a power supply end of the first driving chip, and the power supply end of the first driving chip is connected with a filter capacitor; the second motor drive sub-circuit includes: one input end of the second driving chip is connected with the microprocessor through a resistor R102, and the other input end of the second driving chip is connected with the other input end of the first driving chip through a resistor R100 and a resistor R99 in sequence; two output ends of the second driving chip are connected with the other wiring end of the rotating assembly; and the other wiring end of the motor is also connected with a power supply end of the second driving chip, and the power supply end of the second driving chip is connected with a filter capacitor.

Further, the pipeline control system includes: the three-way electromagnetic valve is arranged on the air pipe and is provided with an electromagnetic valve interface; the electromagnetic valve driving circuit is electrically connected with the electromagnetic valve interface; the three-way electromagnetic valve is used for driving the three-way electromagnetic valve to be in an open or closed state; the microprocessor is electrically connected with the electromagnetic valve driving circuit; the output protection feedback circuit is electrically connected with the microprocessor; the current detection device is used for detecting the current of the solenoid valve interface and protecting the output of the three-way solenoid valve.

In the technical scheme, the microcontroller drives the three-way electromagnetic valve to be opened and closed through the electromagnetic valve driving circuit, so that the electric control electromagnetic valve is opened and closed without resetting of a large torsion spring; meanwhile, the output protection feedback circuit can detect the upper current limit of the solenoid valve interface and protect the output of the solenoid valve.

Further, the first solenoid valve driving sub-circuit includes: the input end of the first driving chip is electrically connected with the collector of the triode through a resistor R35, and the collector is also connected with a direct-current power supply through a resistor R34; the base electrode of the triode is connected with the microprocessor through a resistor R37, and the emitting electrode of the triode is grounded; two output ends of the first driving chip are both connected with one end of the electromagnetic valve interface; two output ends of the first driving chip are respectively connected with power supply ends of the first driving chip through a capacitor C37 and a capacitor C40; the power supply end of the first driving chip is connected with one power supply end of the electromagnetic valve interface; the second solenoid valve driving sub-circuit includes: one input end of the second driving chip is connected with the microprocessor through a resistor R36, and the other input end of the second driving chip is connected with the other input end of the first driving chip through a resistor R33 and a resistor R32 in sequence; two output ends of the second driving chip are connected with the other end of the electromagnetic valve interface; two output ends of the second driving chip are respectively connected with a power supply end of the second driving chip through a capacitor C38 and a capacitor C41; and the power ends VS and GND of the second driving chip are connected with the other power end of the electromagnetic valve interface.

Further, a liquid level sensor is arranged on the waste liquid barrel and used for sensing the liquid level of waste liquid in the waste liquid barrel; the main body is provided with an alarm device electrically connected with the liquid level sensor, and the alarm device is used for receiving a liquid level signal of the liquid level sensor.

Among this technical scheme, through level sensor and alarm device's setting, the user can judge whether excessive according to alarm device's equipment information the waste liquid volume in the waste liquid bucket to when the waste liquid in the waste liquid bucket is excessive, alarm device in time reports to the police, so that the user in time clears up the waste liquid bucket, has reduced the possibility that the waste liquid got into negative pressure system, has reduced the damage of system probably, is favorable to the long-term use of system.

Compared with the prior art, the rotary cutting system provided by the invention has the following beneficial effects:

1. through the arrangement of the rotation control system and the rotating assembly, the rotation control system can control the rotating assembly to act, so that the control of the rotary cutter in the rotating direction is realized, and the action of the rotary cutter in the rotating direction is reduced; through the setting of the slip control system and the slip assembly, the control of the sliding direction of the rotary cutter can be realized.

2. The pipeline control system effectively controls the pressure of an air pipe connected to the rotary cutting assembly, realizes the negative pressure cutting environment of the rotary cutting assembly, increases the positioning precision of the rotary cutter in the rotary cutting sampling process of the mammary gland, reduces the possibility of generating idle cutting or incomplete sampling, increases the working efficiency of medical personnel and reduces the pain of patients.

3. When the sliding block is close to one end of the rotary cutting rod with the positioning component, the sliding block can abut against the positioning component, the sliding block stops sliding continuously, then the rotary cutter stops sliding, the position of the sliding block when sliding is limited through the arrangement of the positioning component, and then the position that the rotary cutter can reach is limited, so that the possibility that the rotary cutter reaches the position inaccurately is reduced, the possibility that the rotary cutter is inaccurately positioned in the rotary-cut mammary gland sampling process is reduced, the possibility that an empty cut or an incomplete sampling is reduced, the working efficiency of medical personnel is increased, and the pain of patients is reduced.

4. The motor is driven to be in an opening or closing state through the motor driving circuit; the motor drives the inner cutter of the rotary cutter to carry out rotary cutting and sampling; if calcified tissues are encountered, the resistance of the calcified tissues is increased, the load of the motor is increased, and the motor current signals acquired by the current sampling circuit are amplified and filtered by the signal processing circuit and then fed back to the microprocessor; the microprocessor recognizes that the motor current rises and the motor rotating speed can drop; the output torque of the motor is increased, so that the rotating speed of the motor is guaranteed, the cutting efficiency is improved, and the phenomenon of immobility of cutting is avoided.

Drawings

The foregoing features, technical features, advantages and implementations of a rotational atherectomy system are further described in the following, in an explicitly understood manner, with reference to the accompanying drawings, which illustrate preferred embodiments.

Fig. 1 is a schematic structural view of an atherectomy system of the present invention;

fig. 2 is a schematic structural view of a rotary cutting assembly in a rotary cutting system according to the present invention;

fig. 3 is a schematic view of the internal structure of a rotational atherectomy assembly of a rotational atherectomy system of the present invention;

fig. 4 is a schematic structural view of a sliding assembly in a rotational atherectomy system of the present invention;

fig. 5 is a schematic structural view of a rotary cutting assembly of a rotary cutting system according to the present invention;

fig. 6 is a schematic diagram of a portion of the electrical circuit of the rotational control system of a rotational atherectomy system of the present invention;

fig. 7 is a schematic circuit diagram of another portion of a rotational control system of a rotational atherectomy system of the present invention;

fig. 8 is a schematic circuit diagram of a pipeline control system in a rotary cutting system according to the present invention.

The reference numbers illustrate: 1. the device comprises a puncture tool nose, 2 parts of a tool tube, 21 parts of an attraction window, 3 parts of a rotary cutter, 4 parts of a shell, 5 parts of a positioning assembly, 6 parts of a rotating gear, 7 parts of a sliding rod, 71 parts of a spiral groove, 8 parts of a connecting joint, 9 parts of an auxiliary joint, 10 parts of a tool apron, 11 parts of a sliding block, 12 parts of an auxiliary rod, 13 parts of a connecting block, 14 parts of a rotary cutting rod, 15 parts of a supporting block, 16 parts of a butt joint groove, 17 parts of a butt joint block, 30 parts of a main body, 31 parts of a chassis, 32 parts of a support, 33 parts of a machine shell, 34 parts of an observation window, 35 parts of a waste liquid barrel, 36 parts of waste liquid, 37 parts of a liquid level sensor and 38 parts of a liquid level opening; 100. the protection circuit comprises a first motor driving sub-circuit, a second motor driving sub-circuit, a current sampling circuit, a signal processing circuit 400, a first electromagnetic valve driving sub-circuit 500, a second electromagnetic valve driving sub-circuit 600 and an output protection feedback circuit 700.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.

For the sake of simplicity, only the parts relevant to the invention are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".

In accordance with one embodiment of the present invention, as shown in fig. 1, an rotational atherectomy system comprises: a main body 30, a lower end of the main body 30 being capable of being supported on the ground, preferably, the lower end of the main body 30 being capable of being provided with a plurality of rollers for adjusting a position of the main body 30 on the ground; the upper side of the main body 30 is provided with a liquid level opening 38, and the waste liquid barrel 35 is arranged at the liquid level opening 38.

The main body 30 is further provided with a connecting opening (not shown in the figure), the connecting opening can be arranged at any position on the main body 30 according to the requirements of a user, the connecting opening can be connected with a rotary cutting assembly, the rotary cutting assembly can be connected to the waste liquid barrel 35 through an air pipe (not shown in the figure), and tissue waste liquid 36 obtained in the rotary cutting process can be conveyed to the waste liquid barrel 35 through the air pipe.

As shown in fig. 2 to 4, the rotary cutting assembly includes a housing 4, a knife tube 2 is disposed on the housing 4, the knife tube 2 is disposed at the left end of the housing 4, the knife tube 2 is hollow, a suction window 21 is further disposed on the knife tube 2, and preferably, one end of the knife tube 2 away from the housing 4, that is, the left end of the knife tube 2 is provided with a puncture knife tip 1.

The rotary cutting rod 14 is arranged in the shell 4, the axial direction of the rotary cutting rod 14 is parallel to the axial direction of the cutter tube 2, the rotary cutter 3 is sleeved on the rotary cutting rod 14, one end of the rotary cutter 3, which is close to the cutter tube 2, is embedded in the cutter tube 2, the rotary cutter 3 slides along the axial direction of the rotary cutting rod 14 and is arranged on the rotary cutting rod 14, the rotary cutter 3 is rotatably connected to the rotary cutting rod 14 along the axial direction of the rotary cutting rod 14, namely, the rotary cutter 3 can slide back and forth along the axial direction of the cutter tube 2, and the rotary cutter 3 can also freely rotate in the cutter tube 2.

The shell 4 is provided with a rotating component for driving the rotary cutter 3 to rotate and a sliding component for driving the rotary cutter 3 to slide, the main body 30 is also provided with a rotation control system electrically connected with the rotating component, and the rotation control system can be used for driving the rotating component to move and driving the rotary cutter to rotate; the main body 30 is further provided with a sliding control system electrically connected to the sliding assembly, and the sliding control system can be used for driving the sliding assembly to move and driving the rotary cutter to advance and retreat.

In this embodiment, through the arrangement of the rotation control system and the rotating assembly, the rotation control system can control the action of the rotating assembly, so as to realize the control of the rotary cutter 3 in the rotation direction and reduce the action of the rotary cutter 3 in the rotation direction; the sliding control system and the sliding assembly are arranged, so that the sliding direction of the rotary cutter 3 can be controlled; and the pipeline control system effectively controls the pressure of the trachea connected on the rotary-cut component, realizes the negative pressure cutting environment of the rotary-cut component, increases the positioning precision of the rotary-cut cutter 3 in the rotary-cut sampling process of the mammary gland, reduces the possibility of generating idle cutting or incomplete sampling, increases the working efficiency of medical personnel and reduces the pain of patients.

According to another embodiment of the present invention, as shown in fig. 2 to 4, a rotational atherectomy system is different from the first embodiment in the specific structure of the sliding assembly.

In the first embodiment, the sliding assembly includes the sliding rod 7, the sliding block 11 and a sliding driving device (not shown), and the sliding control system can be electrically connected to the sliding driving device.

The axis of the sliding rod 7 is parallel to the axis of the rotary cutting rod 14, namely the sliding rod 7 is horizontally arranged in the shell 4, the sliding block 11 is arranged on the sliding rod 7 along the axis direction of the sliding rod 7, and the sliding block 11 can be connected to the rotary cutting knife 3; the sliding driving device can be used for driving the sliding block 11 to slide, and when the sliding block 11 slides, the sliding block 11 can drive the rotary cutter 3 to slide along the axial direction of the rotary cutting rod 14; at least one end of the sliding rod 7 is provided with a positioning component 5 for abutting of the sliding block 11.

The sliding block 11 slides along the axial direction of the sliding rod 7, when the sliding block 11 is close to one end of the rotary cutting rod 14 with the positioning component 5, the sliding block 11 can abut against the positioning component 5, the sliding block 11 stops sliding continuously, and then the rotary cutting knife 3 stops sliding; preferably, when the positioning assemblies 5 are disposed at both ends of the sliding rod 7, the positions of both ends of the rotary cutter 3 can be limited.

In this embodiment, when the sliding block 11 is close to one end of the rotary cutting rod 14 having the positioning component 5, the sliding block 11 can abut against the positioning component 5, the sliding block 11 stops sliding continuously, and then the rotary cutting knife 3 stops sliding, and by the arrangement of the positioning component 5, the position of the sliding block 11 when sliding is limited, and then the position that the rotary cutting knife 3 can reach is limited, so that the possibility that the rotary cutting knife 3 reaches the position inaccurately is reduced, the possibility that the rotary cutting knife 3 is inaccurately positioned in the rotary mammary gland sampling process is reduced, the possibility that the idle cutting or the sampling is incomplete is reduced, the work efficiency of medical personnel is increased, and the pain of the patient is reduced.

Preferably, when the sliding block 11 abuts against the positioning component 5, the rotary cutting system can judge whether the sliding block 11 abuts against the positioning component 5 by arranging a proximity sensor on the positioning component 5, and then control the sliding block 11 to stop sliding; because when the sliding block 11 butts against the positioning component 5, the sliding component still continues to act, but because the sliding block 11 does not move forward any more, the sliding component converts the electric energy into heat energy, and the current of the sliding driving device is increased, the rotary cutting system can judge whether the sliding block 11 butts against the positioning component 5 by monitoring whether the current of the sliding driving device is larger than the preset current, and then the sliding block 11 is controlled to stop sliding.

Preferably, the positioning component 5 is a spring, the positioning component 5 can be sleeved on the sliding rod 7, specifically, the housing 4 is further provided with a supporting block 15, the supporting block 15 can be arranged at two ends of the sliding rod 7, and one end of the spring sleeved on the sliding rod 7 can be connected to the supporting block 15; when the sliding block 11 moves towards the direction of the positioning component 5 and the positioning component 5 is compressed, the speed of the sliding block 11 is gradually reduced, so that the possibility of sudden speed change of the rotary cutter 3 is reduced, and the rotary cutter 3 can stably cut.

According to the improvement of the above embodiment, in the embodiment, the rotary cutting rod 14 is an air tube, and since the sample obtained after rotary cutting needs to be taken out through the air tube in the rotary cutting sampling process, when the rotary cutting rod 14 is used as the air tube, the rotary cutting tube can be used for sampling and sliding of the rotary cutting knife 3 at the same time, so that the space required in the shell 4 is reduced, and the operation of medical staff is facilitated; when the rotary cutting rod 14 is used as the air pipe, no extra air pipe is needed, unnecessary waste is further reduced, a negative pressure environment at the position of the rotary cutting rod 14 can be realized, and the rotary cutting action of the rotary cutting knife 3 is facilitated.

Specifically, a cutter holder 10 is further arranged at one end, close to the cutter tube 2, of the shell 4, one end of the rotary cutting rod 14 can be connected to the cutter holder 10, the other end of the rotary cutting rod 14 can extend out of the shell 4 and is connected with a connecting joint 8, when the rotary cutting rod 14 is a trachea, the rotary cutting rod 14 can form a negative pressure state at the position of the original rotary cutting blade 3 when controlling the rotary cutting blade 3 to withdraw, and then the rotary cut tissue is controlled to be taken into the waste liquid collecting device along the trachea.

Preferably, the lower side of the rotary cutting rod 14 is further provided with an auxiliary rod 12, the auxiliary rod 12 can also be selected as an air pipe, when the auxiliary rod 12 is an air pipe, one end of the auxiliary rod 12 close to the cutter pipe 2 is connected to the cutter holder 10, the other end of the auxiliary rod 12 can extend out of the shell 4 and is connected to the auxiliary joint 9, the auxiliary rod 12 also needs to be in a tensioning state and has certain structural strength, the rotary cutting knife 3 can be provided with a butt block 17, the lower end of the butt block 17 can be abutted to the auxiliary rod 12, guiding of the auxiliary rod 12 to the rotary cutting knife 3 when sliding is realized, possibility of deviation of the rotary cutting knife 3 is reduced, and stability of the rotary cutting knife 3 when sliding is improved.

Specifically, the sliding rod 7 is provided with a spiral groove 71, the sliding block 11 is provided with a ball (not shown in the figure) embedded in the spiral groove 71, and the sliding block 11 abuts against the outer shell 4; the sliding driving device is used for driving the sliding rod 7 to rotate and driving the sliding block 11 to slide along the axial direction of the sliding rod 7, and specifically, in this embodiment, the sliding driving device mainly refers to a rotating driving device such as a motor.

In this embodiment, the slide rod 7 and the slide block 11 can form a ball screw structure, the slide driving device only needs to drive the slide rod 7 to rotate, the slide of the slide block 11 on the slide rod 7 can be realized, the driving mode of the slide driving device is simple, and the control mode of the slide control system is simple.

The pitch of the spiral groove 71 at the two ends of the sliding rod 7 is smaller than that of the spiral groove 71 at the middle part of the sliding rod 7. When the sliding block 11 is located at both ends of the sliding rod 7, the rotary cutter 3 is also located at a position close to the end in the cutter tube 2 and is performing rotary cutting sampling, so that the rotary cutter 3 needs to reduce the speed to perform sampling stably; and when the sliding block 11 slides to the middle part of the sliding rod 7, the rotary cutter 3 does not sample, so that a larger thread pitch can be selected on the sliding rod 7, the sliding speed of the sliding block 11 on the sliding rod 7 is increased, and the sliding efficiency of the sliding block 11 is increased.

In this embodiment, by controlling the pitch of the spiral groove 71 on the sliding rod 7, stable sampling of the rotary cutter 3 is simultaneously achieved, and the operation efficiency of the sliding driving device is increased.

Specifically, the pitch of the spiral groove 71 in the middle of the slide rod 7 is the largest, the pitch of the spiral groove 71 is continuously decreased when the spiral groove 71 extends to both ends, and when the spiral groove 71 extends to both ends, the pitch of the spiral groove 71 is not changed, a smaller pitch is maintained, and the spiral groove continues to extend at the pitch.

According to another embodiment of the present invention, as shown in fig. 2 to 5, a rotational atherectomy system is provided, which is different from the first embodiment in the arrangement of the connecting block 13 and the specific structure of the rotating assembly.

In the first embodiment, the rotary cutter 3 is provided with the connecting block 13, the sliding block 11 is provided with the abutting groove 16 for abutting the connecting block 13, and the abutting groove 16 can penetrate through the sliding block 11 along the axial direction perpendicular to the sliding rod 7. Through the arrangement of the connecting block 13 and the abutting groove 16, when the sliding block 11 needs to drive the rotary cutter 3 to slide, a user can rotate the connecting block 13 into the abutting groove 16, and when the sliding block 11 slides, the inner wall of the abutting groove 16 can abut against the connecting block 13, so that the rotary cutter 3 is driven to slide; when the abutting groove 16 penetrates through the sliding block 11 along the direction perpendicular to the axial direction of the sliding rod 7, the connecting block 13 can stably enter or separate from the abutting groove 16, and the possibility of interference between the connecting block 13 and the sliding block 11 is reduced.

Preferably, the connecting block 13 is disposed around the rotary cutter 3, and in the current state, the connecting block 13 can be always located in the abutting groove 16, so that the rotary cutter 3 can still rotate during the sliding process of the rotary cutter 3, and the rotary cutter 3 can rotate and slide at the same time.

According to the improvement of the above embodiment, in this embodiment, the rotating assembly includes the rotating gear 6, the axis of the rotating gear 6 is parallel to the axis of the rotary cutting rod 14, and the connecting block 13 is a gear engaged with the rotating gear 6; the turning assembly further comprises a turning drive for driving the turning gear 6 in rotation. Through the setting of the rotating gear 6 and the setting of the connecting block 13 as the gear meshed with the rotating gear 6, the effect that the rotating assembly drives the rotary cutter 3 to rotate can be realized.

Preferably, the length of the rotary gear 6 in the axial direction thereof is greater than the sliding length of the sliding block 11. The rotating gear 6 in a fixed state does not need to move, can be meshed with the connecting block 13 at any position, the rotating gear 6 does not need to move, the rotating effect of the rotary cutter 3 can be met only by rotating, and the rotary cutter 3 is convenient for a user to operate.

According to yet another embodiment of the present invention, as shown in fig. 6 and 7, a rotational atherectomy system, which is different from the first embodiment in the specific structure of the rotation control system, is provided.

On the basis of the first embodiment, the rotation control system includes: the rotation driving circuit is electrically connected with the wiring terminal of the rotation assembly; the rotating component is driven to be in an opening or closing state; a current sampling circuit 300 electrically connected to the terminal of the rotating assembly; the rotating current signal is used for detecting the rotating assembly; a signal processing circuit 400 electrically connected to the current sampling circuit 300; the device is used for amplifying and filtering the rotation current signal; a microprocessor electrically connected to the rotation driving circuit and the signal processing circuit 400, respectively; for receiving the rotation current signal processed by the signal processing circuit 400, and outputting a rotation driving signal to the rotation driving circuit according to the rotation circuit signal.

Specifically, the microprocessor outputs PWM waves to the motor driving circuit, and the motor is driven to be in an opening or closing state through the motor driving circuit; the motor drives the inner cutter of the rotary cutter to carry out rotary cutting and sampling; if calcified tissues are encountered, the resistance of the calcified tissues is increased, the load of the motor is increased, and the motor current signals collected by the current sampling circuit 300 are amplified and filtered by the signal processing circuit 400 and then fed back to the microprocessor; the microprocessor recognizes that the motor current rises and the motor rotating speed can drop; the microprocessor adjusts the duty ratio of the PWM wave, so that the output torque of the motor is increased, the rotating speed of the motor is guaranteed, the cutting efficiency is improved, and the phenomenon of immobility is avoided.

According to a modification of the above embodiment, in the present embodiment, the motor drive circuit includes: the first motor driving sub-circuit 100 and the second motor driving sub-circuit 200 are electrically connected to terminals of the motor, and are used for driving the motor to be in an on or off state according to different duty ratio voltage signals provided by the microprocessor.

Specifically, the first motor driving sub-circuit 100 and the second motor driving sub-circuit 200 control the current flowing direction of the motor terminals, and the current flows from the first motor driving sub-circuit 100 to the second motor driving sub-circuit 200, or flows from the second motor driving sub-circuit 200 to the first motor driving sub-circuit 100, so that the opening and closing of the electric control motor can be completely controlled.

According to a modification of the above-described embodiment, in the present embodiment, as shown in fig. 6, the first motor drive sub-circuit 100 includes: an input terminal IN of the first driver chip U26 and the first driver chip U26 are connected to a microprocessor (not shown) through a resistor R101.

Two output ends OUT of the first driving chip U26 are both connected with a terminal MOTOR1_ A of the MOTOR; a terminal MOTOR1_ A of the MOTOR is also connected with a power supply terminal VS/GND of the first driving chip U26, and filter capacitors C96 and C97 are respectively connected between the power supply terminals VS/GND of the first driving chip U26; a filter capacitor C99 is connected between a power supply end VS and an output end OUT of the first driving chip U26, and a filter capacitor C102 is connected between a power supply end GND and an output end OUT of the first driving chip U26; the ports IS and SR of the first driving chip U26 are grounded through a filter sub-circuit consisting of resistors R103/R106 and capacitors C101/C106.

The second motor drive sub-circuit 200 includes: one input end IN of the second driving chip U27 of the second driving chip U27 is connected with the microprocessor through a resistor R102, and the other input end INH of the second driving chip U27 is connected with the other input end INH of the first driving chip U26 through a resistor R100 and a resistor R99 IN sequence;

two output ends OUT of the second driving chip U27 are both connected with the other terminal MOTOR1_ B of the MOTOR; the other terminal MOTOR1_ B of the MOTOR is also connected with a power supply terminal VS/GND of a second driving chip U27, and a filter capacitor C98 is connected between the power supply terminal VS/GND of the second driving chip U27; a filter capacitor C100 is connected between a power supply end VS and an output end OUT of the second driving chip U27, and a filter capacitor C103 is connected between a power supply end GND and an output end OUT of the second driving chip U27; the ports IS and SR of the second driving chip U27 are grounded through a filter sub-circuit formed by a resistor R104/R105 and a capacitor C104/C105.

According to a modification of the above-described embodiment, in the present embodiment, as shown in fig. 7, the current sampling circuit 300 includes: the negative input end IP-of the current sampling chip U25 of the current sampling chip U25 is electrically connected with a terminal of the motor, the positive input end IP + of the current sampling chip U25 is respectively connected with a +24V direct-current power supply and the cathode of the diode D14 is electrically connected, and the anode of the diode D14 is grounded; the output end of the current sampling chip U25 is grounded through a capacitor C92; a power supply terminal VSS of the current sampling chip U25 is externally connected with a +5V direct current power supply through a filter capacitor C76.

According to a modification of the above embodiment, in the present embodiment, the signal processing circuit 400 includes: the signal amplification sub-circuit is electrically connected with the current sampling circuit 300 and is used for amplifying the current signal of the motor; the signal filtering sub-circuit is electrically connected with the signal amplifying sub-circuit and is used for filtering the amplified motor current signal; the reference voltage sub-circuit is electrically connected with the signal amplification sub-circuit and the signal comparison sub-circuit; the reference signal is provided for the signal amplifying sub-circuit and the signal comparing sub-circuit; and the signal comparison sub-circuit is also electrically connected with the signal filtering sub-circuit and is used for comparing and analyzing the filtered motor current signal according to the reference signal.

Specifically, the signal amplification sub-circuit comprises a signal amplification chip U23, the input end + of the signal amplification chip U23 is electrically connected with the output end VIOUT of the current sampling chip U25, the input end-/+ of the signal amplification chip U23 is externally connected with a power supply which is subjected to filtering processing, and the signal amplification chip U23 is further connected with a peripheral circuit which enables the signal amplification chip U23 to normally work.

The signal filtering sub-circuit comprises a resistor R90, one end of a resistor R90 is connected with the output end OUT of the signal amplification chip U23, the other end of the resistor R90 is connected with one end of a resistor R91, and the other end of the resistor R90 is grounded through C86; the other end of the resistor R91 is connected with one end of the resistor R92, and the other end of the resistor R91 is grounded through a C87; the other end of the resistor R92 is connected with one end of the resistor R93, and the other end of the resistor R92 is grounded through a C88; the other end of the resistor R93 is connected to the reference voltage sub-circuit, and the other end of the resistor R93 is grounded via C89.

The reference voltage sub-circuit comprises a resistor R87, one end of a resistor R87 is connected with the other end of a resistor R93, the other end of the resistor R87 is connected with one ends of a resistor R84 and a resistor R85 respectively, the other end of the resistor R84 is connected with the other end of the resistor R85 through a resistor RP2, the other end of the resistor R84 is connected with a-5V power supply through a resistor R82, the other end of the resistor R84 is connected with the cathode of a diode D12, the anode of a diode D12 is connected with the cathode of a diode D13, the anode of a diode D13 is connected with a +5V power supply through a resistor R83, and the anode of a diode D13 is connected with the other end of a resistor R85.

The signal comparison sub-circuit comprises a signal comparison chip U24, an input end IN + of the signal comparison chip U24 is connected with a resistor R87, an output end OUT of the signal comparison chip U24 is connected with a microprocessor through resistors R94 and R95 IN sequence, a peripheral circuit enabling the signal comparison chip U24 to work normally is connected with the signal comparison chip U24 IN an external mode, for example, a port IN-of the signal comparison chip U24 is connected with the output end OUT of the signal comparison chip U24 through a resistor R96 and a resistor R97 IN sequence, and a port IN-of the signal comparison chip U24 is also connected with the output end OUT of the signal comparison chip U24 through a capacitor C95; the external connection of the signal comparison chip U24 is a power supply processed by filtering, and so on, which are not described herein again.

In the rotary cutting system described in connection with the second embodiment, when the sliding driving component is a motor, the rotation control system described in this embodiment can also be used as a sliding control system to control the sliding driving component.

According to another embodiment of the present invention, as shown in fig. 8, a rotary cutting system is provided, which is different from the first embodiment in the specific structure of the pipeline control system.

On the basis of the first embodiment, in this embodiment, the pipeline control system includes: the three-way electromagnetic valve is arranged on the air pipe and is provided with an electromagnetic valve interface; the electromagnetic valve driving circuit is electrically connected with the electromagnetic valve interface; the three-way electromagnetic valve is used for driving the three-way electromagnetic valve to be in an open or closed state; the microprocessor is electrically connected with the electromagnetic valve driving circuit; an output protection feedback circuit 700 electrically connected to the microprocessor; the current detection device is used for detecting the current of the solenoid valve interface and protecting the output of the three-way solenoid valve.

Specifically, the microcontroller drives the three-way electromagnetic valve to be opened and closed through the electromagnetic valve driving circuit, so that the electric control electromagnetic valve is opened and closed without resetting of a large torsion spring. Meanwhile, the output protection feedback circuit 700 can detect the upper current limit of the solenoid valve interface to protect the solenoid valve output.

When one end of the air pipe is connected to the rotary cutting component and the other end of the air pipe is connected to the waste liquid barrel, the rotary cutting component can transmit the tissue waste liquid obtained by rotary cutting to the waste liquid barrel; when one end of the air pipe is connected to the rotary cutting assembly and the other end of the air pipe is connected to the vacuum generator, a negative pressure environment can be formed at the cutting part of the rotary cutting assembly, which is beneficial to the rotary cutting of the rotary cutting assembly; the arrangement of the pipeline control system can realize different functions of the air pipe.

According to a modification of the above embodiment, in the present embodiment, the solenoid valve driving circuit includes: the first solenoid valve driving sub-circuit 500 and the second solenoid valve driving sub-circuit 600 are electrically connected to the solenoid valve interface, and the three-way solenoid valve is controlled to be opened or closed by controlling the flow direction of current flowing through the first solenoid valve driving sub-circuit 500 and the second solenoid valve driving sub-circuit 600.

Specifically, the first solenoid valve driving sub-circuit 500 and the second solenoid valve driving sub-circuit 600 control the current flowing direction of the solenoid valve interface, and the current flows in from the first solenoid valve driving sub-circuit 500 and flows out from the second solenoid valve driving sub-circuit 600, or flows in from the second solenoid valve driving sub-circuit 600 and flows out from the first solenoid valve driving sub-circuit 500, so that the opening and closing of the electrically controlled solenoid valve can be completely realized without large torsion spring resetting.

Specifically, when the type of the electromagnet in the three-way electromagnetic valve is selected, the electromagnet with smaller volume and lower cost can be selected. Meanwhile, the operation mode is more flexible, so that the energy consumption of the equipment in the use process is greatly reduced.

According to a modification of the above-described embodiment, in the present embodiment, the first solenoid valve driving sub-circuit 500 includes: an input end IN of the first driving chip U11 of the first driving chip U11 is electrically connected with a collector of the triode Q1 through a resistor R35, and the collector is further connected with a 3.3V dc power supply through a resistor R34; the base electrode of the triode Q1 is connected with the microprocessor through a resistor R37, and the emitter electrode of the triode Q1 is grounded; the port IS of the first driving chip U11 IS grounded through a resistor R38 and a capacitor C39 respectively; the port SR of the first driver chip U11 is grounded through a resistor R41 and a capacitor C44, respectively.

Two output ends OUT of the first driving chip U11 are both connected with one end of the solenoid valve interface; two output ends OUT of the first driving chip U11 are respectively connected with power supply ends VS and GND of the first driving chip U11 through a capacitor C37 and a capacitor C40; the power supply ends VS and GND of the first driving chip U11 are connected with one power supply end of the solenoid valve interface, and the power supply end of the first driving chip U11 is connected with a filter capacitor C35; the power supply end GND of the first driving chip U11 is also electrically connected with the anode of the voltage stabilizing diode D7, and the anode of the voltage stabilizing diode D7 is also connected with a 24V direct-current power supply; the cathode of zener diode D7 is connected to ground.

The second solenoid valve driving sub-circuit 600 includes: one input end IN of the second driving chip U12 and one input end IN of the second driving chip U12 are connected with the microprocessor through a resistor R36, and the other input end INH of the second driving chip U12 is connected with the other input end of the first driving chip U11 through a resistor R33 and a resistor R32 IN sequence;

two output ends OUT of the second driving chip U12 are both connected with the other end of the solenoid valve interface; two output ends OUT of the second driving chip U12 are respectively connected to power supply ends VS and GND of the second driving chip U12 through a capacitor C38 and a capacitor C41.

The power ends VS and GND of the second driving chip U12 are connected with the other power end of the solenoid valve interface, and the power ends VS and GND of the second driving chip U12 are connected with a filter capacitor C36.

Specifically, the first driving chip and the second driving chip are respectively full-bridge circuits formed by two half-bridge MOS chips, one electromagnet capable of rotating in two directions can be controlled, self-resetting of a spring is eliminated, and the torque direction of the electromagnet is determined by the current direction flowing through the electromagnet, so that the three-way valve is opened and closed. Because there is no spring, the torque in both directions need only be slightly greater than the torque actually required to open and close the three-way valve. And after the three-way valve is opened or closed, the three-way valve does not need to be electrified all the time, so that the energy consumption is greatly reduced.

Based on the foregoing embodiments, in this embodiment, the output protection feedback circuit 700 includes: the non-inverting input end of the comparator U13A and the non-inverting input end of the comparator U13A are electrically connected with the solenoid valve interface through a resistor R46 and are grounded through a resistor R46 and a resistor R48 in sequence. The inverting input end of the comparator U13A is connected with a 5V direct current power supply through a resistor R44 and is also grounded through a filter sub-circuit; the filter sub-circuit is composed of a resistor R42 and a capacitor C45 which are connected in parallel. The output end of the comparator U13A is electrically connected with the microprocessor through a resistor R45 and is grounded through a resistor R45 and a resistor R47 in sequence; the output end of the comparator U13A is also connected with a 5V direct current power supply through a resistor R43.

Specifically, when the solenoid valve interface has current, the non-inverting input terminal of the comparator U13A can detect the solenoid valve interface current, the inverting input terminal of the comparator U13A provides a reference voltage, and then the magnitude of the solenoid valve interface current is compared and analyzed, and when the solenoid valve interface current reaches the upper limit, protection is output to the solenoid valve through the microprocessor.

According to another embodiment of the present invention, as shown in fig. 1, a rotational atherectomy system, which is different from the first embodiment in the arrangement of the liquid level sensor 37 and the alarm device.

On the basis of the first embodiment, in this embodiment, a liquid level sensor 37 is disposed on the waste liquid barrel 35, and the liquid level sensor 37 can be used for sensing the liquid level of the waste liquid 36 in the waste liquid barrel 35; the main body 30 is further provided with an alarm device (not shown in the figure), the alarm device is electrically connected to the liquid level sensor 37, and the alarm device can be used for receiving a liquid level signal of the liquid level sensor 37; when liquid level sensor 37 sensed that the liquid level of waste liquid 36 is higher than the preset liquid level, liquid level sensor 37 can send liquid level signal to alarm device, and alarm device can report to the police when receiving liquid level signal, reminds the user to clear up waste liquid bucket 35.

When setting up predetermined liquid level, the user can regard as predetermined capacity 70% ~ 90% of the capacity of waste liquid bucket 35 to after waste liquid 36 in waste liquid bucket 35 reaches predetermined capacity, still have certain surplus in the waste liquid bucket 35, so that after alarm device reported to the police, the user can reduce the influence of clearance waste liquid bucket 35 to the operation with the timely completion of operation.

In this embodiment, through level sensor 37 and alarm device's setting, the user can judge whether the 36 volume of waste liquid in waste liquid bucket 35 is excessive according to alarm device's equipment information to when 36 excessive of waste liquid in waste liquid bucket 35, alarm device in time reports to the police, so that the user in time clears up waste liquid bucket 35, has reduced the possibility that 36 entering negative pressure system of waste liquid, has reduced the possibility of the damage of system, is favorable to the long-term use of system.

According to the improvement of the above embodiment, in this embodiment, the waste liquid barrel 35 includes a barrel body and an upper cover (not shown in the figure), the barrel body is a circular truncated cone with an open end, a cavity is arranged inside the barrel body, the opening of the barrel body is located at one end with a larger radius of the barrel body, and the upper cover is used for covering the opening of the barrel body; the radius of the liquid level opening 38 is greater than the radius of the bottom surface of the bucket body, and the radius of the liquid level opening 38 is less than the radius of the opening of the bucket body.

Specifically, the user can acquire forward waste liquid bucket 35, and waste liquid bucket 35's lower extreme radius is less, and the upper end is stamped the upper cover, and the user can be with waste liquid bucket 35 from the vertical direction of the liquid level opening 38 of main part 30 upside, until waste liquid bucket 35's outer wall butt on liquid level opening 38, has realized waste liquid bucket 35's installation.

In this embodiment, through the concrete setting of liquid level opening 38 and waste liquid bucket 35, can realize the stable assembly of main part 30 and waste liquid bucket 35, and need not all the other assembly connectors, made things convenient for the user to clear up waste liquid 36 of waste liquid bucket 35.

According to the improvement of above-mentioned embodiment, in this embodiment, level sensor 37 sets up in the outside of waste liquid bucket 35, and level sensor 37 is non-contact sensor, selects for use through level sensor 37 position and kind, has reduced waste liquid 36 to level sensor 37's influence, is favorable to waste liquid 36 monitoring devices's long-term use.

Specifically, level sensor 37 can set up the one side that is close to waste liquid bucket 35 at casing 33, and level sensor 37 can set up the upper surface in casing 33 promptly to the butt is on waste liquid bucket 35, and when the user of being convenient for cleared up waste liquid bucket 35, need not to take out level sensor 37, has made things convenient for the user to the clearance of waste liquid bucket 35.

Preferably, in the present embodiment, an observation window 34 is provided at one end of the main body 30 close to the waste liquid barrel 35, that is, the observation window 34 is opened at the upper side of the main body 30; in this embodiment, through observation window 34's setting, when alarm device did not report to the police, the user can obtain waste liquid 36's liquid level in waste liquid bucket 35 according to observation window 34, and whether the liquid level of waste liquid 36 in the waste liquid bucket 35 of the user's understanding under the current condition had the influence to operation afterwards, and whether the user of being convenient for confirms that whether need clear up waste liquid bucket 35.

The upper end of the observation window 34 is close to the upper side of the main body 30, that is, the upper side of the observation window 34 can extend to the upper side edge of the main body 30, and the lower end of the observation window 34 is close to the lower end of the waste liquid barrel 35, in this embodiment, the observation window 34 can completely show the height of the waste liquid 36 in the waste liquid barrel 35 in the main body 30, so that a user can conveniently determine whether to clean the waste liquid barrel 35.

According to the modification of the above embodiment, in the present embodiment, the width of the observation window 34 is larger than the diameter of the waste liquid barrel 35, and the observation window 34 can fully display the state of the waste liquid 36 in the waste liquid barrel 35 in the main body 30, so that the user can observe the liquid level in the waste liquid barrel 35 from a distance.

Preferably, in this embodiment, the main body 30 includes a chassis 31, the chassis 31 is configured to be disposed at a side close to the bottom surface, the upper side of the chassis 31 is provided with a plurality of brackets 32, the brackets 32 are preferably aluminum profiles, the plurality of brackets 32 can be fixedly connected through corner connectors, and the plurality of brackets 32 can form a frame of the main body 30.

The bracket 32 is provided with a controller (not shown in the figure), the controller can be electrically connected with the liquid level sensor 37 and the alarm device, and the controller can receive the electric signal of the liquid level sensor 37 and control the alarm device to alarm when receiving the electric signal of the liquid level sensor 37.

The main body 30 further includes a casing 33, the casing 33 can be disposed on the upper side of the chassis 31, the casing 33 can be sleeved on the outer sides of the bracket 32 and the controller for wrapping the bracket 32 and the controller, and the liquid level opening 38 can be disposed on one side of the casing 33 far away from the chassis 31, that is, the liquid level opening 38 is disposed on the upper side of the casing 33.

In this embodiment, the liquid level sensor 37 and the alarm device can be electrically connected by the controller.

Specifically, the chassis 31 can be directly supported on the bottom surface, or a plurality of rollers can be provided on the lower side of the chassis 31, i.e., the moving action of the main body 30 can be realized.

It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. An rotational atherectomy system, comprising:

the waste liquid tank comprises a main body, wherein a liquid level opening is formed in the main body, and a waste liquid barrel is arranged at the liquid level opening;

the main body is provided with a connecting opening, the connecting opening is connected with a rotary cutting assembly, and the rotary cutting assembly is connected with the waste liquid barrel through an air pipe;

the main body is provided with a pipeline control system for controlling the air pipe;

the rotary cutting assembly comprises a shell, a rotary cutting rod is arranged in the shell, a rotary cutter is sleeved on the rotary cutting rod, the rotary cutter is arranged on the rotary cutting rod in a sliding mode along the axis direction of the rotary cutting rod, and the rotary cutter is connected to the rotary cutting rod in a rotating mode along the axis direction of the rotary cutting rod;

the shell is provided with a rotating assembly for driving the rotary cutter to rotate and a sliding assembly for driving the rotary cutter to slide;

the main body is also provided with a rotation control system electrically connected with the rotating assembly and a sliding control system electrically connected with the sliding assembly;

the sliding component comprises a sliding rod, a sliding block and a sliding driving device;

the axis of the sliding rod is parallel to the axis of the rotary cutting rod;

the sliding block is arranged on the sliding rod in a sliding mode along the axial direction of the sliding rod, and the sliding block is connected to the rotary cutter and used for driving the rotary cutter to slide along the axial direction of the rotary cutting rod;

the sliding driving device is used for driving the sliding block to slide along the axial direction of the sliding rod;

at least one end of the sliding rod is provided with a positioning component used for abutting against the sliding block, the positioning component is a spring, the positioning component can be sleeved on the sliding rod, the shell is further provided with a supporting block, and one end of the spring is connected to the supporting block;

the shell is provided with a cutter tube, the cutter tube is hollow, one end of the rotary cutter close to the cutter tube is freely and rotatably embedded in the cutter tube, the cutter tube is further provided with a suction window, the cutter tube is far away from the shell and extends along the axial direction of the rotary cutting rod, and one end of the cutter tube far away from the shell is provided with a puncture cutter point;

the rotary cutting rod is an air pipe, and a cutter holder is further arranged at one end, close to the cutter pipe, in the shell;

the rotary cutter is characterized in that an auxiliary rod is further arranged on the lower side of the rotary cutter rod, the auxiliary rod is an air pipe, one end, close to the cutter pipe, of the auxiliary rod is connected onto the cutter holder, a butt joint block is arranged on the rotary cutter, and the lower end of the butt joint block is in butt joint with the auxiliary rod, so that the auxiliary rod guides the rotary cutter when the rotary cutter slides.

2. An rotational atherectomy system according to claim 1, wherein:

the sliding rod is provided with a spiral groove, the sliding block and the sliding rod form a ball screw structure, and the spiral grooves are formed in the screw pitches at the two ends of the sliding rod and are smaller than the screw pitch in the middle of the sliding rod.

3. An rotational atherectomy system according to claim 1, wherein:

the rotary cutter is provided with a connecting block, the sliding block is provided with a butt joint groove used for butting against the connecting block, and the butt joint groove penetrates through the sliding block along the direction perpendicular to the axis of the sliding rod.

4. An rotational atherectomy system according to claim 3, wherein:

the rotating assembly comprises a rotating gear, the axis of the rotating gear is parallel to the axis of the rotary cutting rod, and the connecting block is a gear meshed with the rotating gear;

the rotating assembly further comprises a rotating driving device for driving the rotating gear to rotate.

5. An rotational atherectomy system according to claim 1, wherein the rotational control system comprises:

the rotation driving circuit is electrically connected with the wiring terminal of the rotation assembly; the rotating component is driven to be in an opening or closing state;

the current sampling circuit is electrically connected with the wiring terminal of the rotating assembly; the rotating current signal is used for detecting the rotating assembly;

the signal processing circuit is electrically connected with the current sampling circuit; the device is used for amplifying and filtering the rotation current signal;

the microprocessor is electrically connected with the rotation driving circuit and the signal processing circuit respectively; and the rotation driving circuit is used for receiving the rotation current signal processed by the signal processing circuit and outputting a rotation driving signal to the rotation driving circuit according to the rotation current signal.

6. An rotational atherectomy system according to claim 5, wherein the rotational drive circuit comprises:

the first rotation driving sub-circuit and the second rotation driving sub-circuit are electrically connected with the terminal of the rotation assembly and are used for driving the rotation assembly to be in an opening or closing state according to different duty ratio voltage signals provided by the microprocessor;

the first rotation driving sub-circuit includes:

one input end of the first driving chip is connected with the microprocessor through a resistor R101;

two output ends of the first driving chip are connected with a wiring end of the rotating assembly; a wiring terminal of the rotating assembly is also connected with a power supply end of the first driving chip, and the power supply end of the first driving chip is connected with a filter capacitor;

the second rotation driving sub-circuit includes:

one input end of the second driving chip is connected with the microprocessor through a resistor R102, and the other input end of the second driving chip is connected with the other input end of the first driving chip through a resistor R100 and a resistor R99 in sequence;

two output ends of the second driving chip are connected with the other wiring end of the rotating assembly; and the other wiring end of the rotating assembly is also connected with a power supply end of the second driving chip, and the power supply end of the second driving chip is connected with a filter capacitor.

7. A rotational atherectomy system according to claim 1, wherein the conduit control system comprises:

the three-way electromagnetic valve is arranged on the air pipe and is provided with an electromagnetic valve interface;

the electromagnetic valve driving circuit is electrically connected with the electromagnetic valve interface; the three-way electromagnetic valve is used for driving the three-way electromagnetic valve to be in an open or closed state;

the microprocessor is electrically connected with the electromagnetic valve driving circuit;

the output protection feedback circuit is electrically connected with the microprocessor; the current detection device is used for detecting the current of the solenoid valve interface and protecting the output of the three-way solenoid valve.

8. An rotational atherectomy system according to claim 7, wherein:

the method comprises the following steps:

the input end of the first driving chip is electrically connected with the collector of the triode through a resistor R35, and the collector is also connected with a direct-current power supply through a resistor R34; the base electrode of the triode is connected with the microprocessor through a resistor R37, and the emitting electrode of the triode is grounded;

two output ends of the first driving chip are both connected with one end of the electromagnetic valve interface; two output ends of the first driving chip are respectively connected with power supply ends of the first driving chip through a capacitor C37 and a capacitor C40; the power supply end of the first driving chip is connected with one power supply end of the electromagnetic valve interface;

one input end of the second driving chip is connected with the microprocessor through a resistor R36, and the other input end of the second driving chip is connected with the other input end of the first driving chip through a resistor R33 and a resistor R32 in sequence;

two output ends of the second driving chip are connected with the other end of the electromagnetic valve interface; two output ends of the second driving chip are respectively connected with a power supply end of the second driving chip through a capacitor C38 and a capacitor C41; and the power ends VS and GND of the second driving chip are connected with the other power end of the electromagnetic valve interface.

9. An rotational atherectomy system according to claim 1, wherein:

the liquid level sensor is arranged on the waste liquid barrel and used for sensing the liquid level of waste liquid in the waste liquid barrel;

the main body is provided with an alarm device electrically connected with the liquid level sensor, and the alarm device is used for receiving a liquid level signal of the liquid level sensor.