Vacuum pipeline breast biopsy rotary cutting device
By adopting a vacuum pipeline control mechanism driven by a self-held rotary electromagnet in the breast biopsy and rotary cutting equipment, the problems of hospital infection risk and high energy consumption in the vacuum pipeline control mechanism in the prior art are solved, and a higher Safety and efficiency.
Patent Information
- Application Number
- CN202420357673.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-27
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-02-27
AI Technical Summary
The vacuum pipeline control mechanism in existing breast biopsy and rotary cutting equipment has problems with hospital infection risk and high energy consumption, especially the reuse of some pipelines of the clamp valves is difficult to clean and disinfect, and the energy loss of electromagnet drive is relatively high.
Using a vacuum pipeline control mechanism driven by a self-held rotating solenoid, the double-body combined valve is realized by setting the main control unit, a human-machine interface, a vacuum barrel, a self-held rotating device, a rotary cutting biopsy needle and a driving handle on the main machine. The use of integrated and self-held rotating solenoids avoids the reuse of the pipe section of the pinch valve and reduces energy consumption.
It effectively avoids hospital infection risk, reduces energy consumption and electromagnet heating, and improves the safety and efficiency of the equipment.
Smart Images
Figure CN222444178U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of medical equipment, in particular to a vacuum pipeline breast biopsy rotary cutting device. Background Art
[0002] In the existing breast biopsy and rotary cutting equipment, the vacuum pipeline is the connection channel for the breast biopsy and rotary cutting equipment to provide vacuum negative pressure for its application part. The vacuum negative pressure has two key functions in breast biopsy: one is to attract the sample into the knife groove when the rotary cutting biopsy needle is inserted into the breast tissue, and the other is to transfer the sample to the sample collection chamber outside the body under vacuum negative pressure after cutting the sample sucked into the knife groove. During the sample attraction and sample transfer process, it is necessary to control the vacuum pipeline to connect the host vacuum system with the rotary cutting biopsy needle pipeline. When a sampling is completed, it is necessary to close the vacuum pipeline connection and connect the rotary cutting biopsy needle to the atmosphere to release the vacuum negative pressure at the sampling position, which is convenient for adjusting the knife. The control mechanism of the vacuum pipeline is generally controlled by two pinch valves. When the rotary cutting biopsy needle is inserted into the breast tissue, the pinch valve connected to the host vacuum negative pressure system is opened to achieve sample attraction and sample transfer. After completing a sampling, the pinch valve is closed, and the pinch valve 2 connecting the rotary cutting biopsy needle to the atmosphere is opened to release the vacuum negative pressure at the sampling position.
[0003] The existing technology mainly has the following deficiencies:
[0004] 1. The pipeline in the pinch valve is a part of the pipeline connecting the rotary biopsy needle and the main machine vacuum negative pressure system. This section of the pipeline needs to pass the blood and water produced during the operation and the waste liquid produced by flushing. Because the pinch valve pipeline is placed inside the machine and needs to be fixed, it is not easy to replace. In the existing technology, this section of the pipeline is generally reused during use. Because the pipeline is difficult to clean and disinfect, it may even not be cleaned, which brings hospital infection risks to doctors and patients.
[0005] 2. The pinch valve used in the prior art is a push-pull self-resetting electromagnet drive. During the standby process of the breast biopsy and peeling equipment, the electromagnet needs to be energized all the time to allow the pinch valve to disconnect the vacuum pipeline to maintain the pressure of the vacuum negative pressure system stable. There is only a short power outage during the sampling process, so the electromagnet energy loss is high, and the electromagnet generates a lot of heat, which is not conducive to the heat dissipation of the whole machine. Utility Model Content
[0006] In order to overcome the shortcomings of the background technology, the utility model discloses a vacuum pipeline control mechanism based on a self-holding rotating electromagnet drive. The utility model arranges a main control unit, a human-machine interface, a vacuum barrel, a self-holding rotating device, a rotary biopsy needle and a driving handle on the main machine to avoid the risk of hospital infection caused by repeated use of part of the pipe of the clamping valve and reduce energy consumption and heating of the electromagnet.
[0007] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:
[0008] A vacuum pipeline breast biopsy peeling device comprises a mainframe, a main control unit, a human-machine interface, a vacuum barrel, a self-holding rotating device, a peeling biopsy needle and a driving handle. The human-machine interface is arranged on the side of the mainframe, the main control unit and the self-holding rotating device are arranged in the mainframe, the main control unit is electrically connected with the self-holding rotating device and the driving handle through a self-holding driving circuit, the peeling biopsy needle is installed on the driving handle, an electromagnet mounting plate is arranged on the self-holding rotating device, the self-holding rotating device is fixed to the inside of the mainframe through the electromagnet mounting plate, a vacuum barrel is arranged above the mainframe, the vacuum barrel outlet is connected to a vacuum pump, and the vacuum barrel inlet is connected with the peeling biopsy needle through trachea three.
[0009] The rotary biopsy needle comprises a cutter head, trachea 1, trachea 2 and a double-body combination valve, wherein the double-body combination valve is mounted on an electromagnet mounting plate, trachea 1 and trachea 2 are arranged on the double-body combination valve, and the other ends of trachea 1 and trachea 2 are provided with a cutter head.
[0010] The cutter head comprises an axial air path interface, a lateral air path interface, a lateral air path connecting pipe, an axial air path connecting pipe, a feed assembly, an inner cutter tube and an outer cutter tube at one end arranged in the outer shell, the outer shell of the cutter head is provided with a sample collection chamber, the outer cutter tube is provided with a cutter tip at one end outside the outer shell, a cutter groove is provided on the side of the outer cutter tube behind the cutter tip, a partition is axially provided inside the outer cutter tube, a lower end air chamber is provided below the partition, lateral air holes are distributed on the outer cutter tube partition, the lower end air chamber is connected with the lateral air holes, the inner cutter tube is provided on the partition of the outer cutter tube, and a feed assembly is provided at the end of the inner cutter tube away from the cutter tip.
[0011] An axial air path interface and a lateral air path interface are provided at the other end of the cutter head. One end of the axial air path interface is connected to air pipe one, and the other end of the axial air path interface is connected to the axial air path connecting pipe. The inner cutter tube is sleeved on the axial air path connecting pipe, one end of the lateral air path interface is connected to air pipe two, and the other end of the lateral air path interface is connected to the lateral air path connecting pipe, and the lateral air path connecting pipe is connected to the lower end air chamber.
[0012] The feed assembly includes a feed drive screw, a feed drive nut and a peeling drive gear. Both ends of the feed drive screw are rotatably connected to the inner wall of the shell. A feed drive nut is provided on the side of the feed drive screw. The feed drive screw is threadedly connected to the feed drive nut. A peeling drive gear is provided on the feed drive nut. The peeling drive gear is rotatably connected to the feed drive nut. The peeling drive gear is sleeved on the side of the inner knife tube.
[0013] The double-body combination valve includes a mounting seat, a valve body, a connector 1, a connector 2 and a valve core. A mounting seat is provided at one end of the valve body, and the mounting seat is installed on the electromagnet mounting plate. Connector 1 and connector 2 are provided at the other end of the valve body, and valve cores are provided in connector 1 and connector 2.
[0014] The connector one and the connector two are both provided with an air exhaust port, an air inlet and a vacuum pressure relief port. The air exhaust port of the connector one is connected to one end of the air pipe two, and the air exhaust port of the connector two is connected to one end of the air pipe one. The air inlet and the vacuum pressure relief port of the connector one are symmetrically distributed on the connector one and are on the same central axis, and the air inlet and the vacuum pressure relief port of the connector two are symmetrically distributed on the connector two and are on the same central axis.
[0015] Two lateral holes are formed on the side of the valve core, and the lateral holes are distributed along the circumference of the valve core. The included angle of the central axes of the lateral holes of the valve core is 120 degrees.
[0016] The self-holding rotating device comprises a self-holding rotating electromagnet 1, a self-holding rotating electromagnet 2 and an electromagnet mounting plate. The self-holding rotating electromagnet 1 and the self-holding rotating electromagnet 2 are mounted on one side of the electromagnet mounting plate. A driving handle is provided on the output shafts of the self-holding rotating electromagnet 1 and the self-holding rotating electromagnet 2.
[0017] The driving handle passes through the mounting seat and is arranged in the valve body. The two driving handles are respectively matched with the two valve cores, and the driving handles drive the valve core to rotate.
[0018] The vacuum pipeline control mechanism based on the self-holding rotating electromagnet drive described in the utility model has strong practicality and is very convenient to use. The double-body combination valve of the control pipeline is integrated on the pipeline and installed on the double-body combination valve mounting seat on the main machine when in use, which is convenient for installation and disassembly; the rotary cutting biopsy needle is the application part of the main machine and is disposable, thus avoiding the hospital infection risk caused by the repeated use of the original clamping valve part pipeline; the self-holding rotating device has a short response time and can self-maintain the current state after power failure without voltage to maintain, thereby reducing energy consumption and heating of the electromagnet. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0020] Figure 2 This is a schematic diagram of the cutter head structure of the utility model;
[0021] Figure 3 It is a schematic diagram of the position relationship between the double-body combination valve and the self-holding rotating device of the utility model;
[0022] Figure 4 It is a cross-sectional view of the double-body combined valve and the self-retaining rotating device of the utility model;
[0023] Figure 5 This is a schematic diagram of the three-dimensional structure of the valve core of the utility model;
[0024] Figure 6 This is a circuit diagram of a self-holding drive circuit of the utility model;
[0025] In the figure: 10, main machine; 11, vacuum barrel; 12, human-machine interface; 13, self-holding rotating electromagnet 1; 14, electromagnet mounting plate; 15, driving handle; 16, mounting seat; 17, self-holding rotating electromagnet 2; 20, trachea 3; 30, double-body combination valve; 31, connector 1; 32, connector 2; 60, trachea 1; 70, trachea 2; 80, driving handle; 90, rotary biopsy needle; 41, valve core; 42, valve body; 421, air extraction port ; 422, air inlet; 423, vacuum relief port; 901, axial air path interface; 902, lateral air path interface; 903, lateral air path connecting pipe; 904, axial air path connecting pipe; 905, feed drive screw; 906, feed drive nut; 907, rotary cutting drive gear; 908, inner knife tube; 909, lateral air hole; 910, knife groove; 911, knife tip; 912, outer knife tube; 913, lower end air chamber; 914, sample collection chamber. DETAILED DESCRIPTION
[0026] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.
[0027] Combined with Figures 1 to 6 A vacuum pipeline breast biopsy peeling device comprises a host 10, a main control unit, a human-machine interface 12, a vacuum barrel 11, a self-holding rotating device, a peeling biopsy needle 90 and a driving handle 80. The human-machine interface 12 is provided on the side of the host 10, and the human-machine interface 12 provides touch operation buttons and display functions for the whole machine. The main control unit and the self-holding rotating device are arranged in the host 10, and the main control unit is electrically connected to the self-holding rotating device and the driving handle 80 through a self-holding driving circuit. The peeling biopsy needle 90 is installed on the driving handle 80, and the driving handle 80 drives the peeling biopsy needle 90 to realize the feeding and peeling functions. The self-holding rotating device is provided with an electromagnet mounting plate 14, and the self-holding rotating device is provided with an electromagnet mounting plate 14. A vacuum barrel 11 is provided above the host 10, and the outlet of the vacuum barrel 11 is connected to a vacuum pump. The inlet of the vacuum barrel 11 is connected to the peeling biopsy needle 90 through an air pipe 20, which is used to buffer the pressure so that the pressure value is not easy to change suddenly, and gas-liquid separation can be realized to ensure that liquid and other debris will not be sucked into the vacuum pump and cause damage to the vacuum pump.
[0028] The rotary biopsy needle 90 includes a cutter head, trachea 1 60, trachea 2 70 and a double-body combination valve 30. The double-body combination valve 30 is installed on the electromagnet mounting plate 14. Trachea 1 60 and trachea 2 70 are provided on the double-body combination valve 30. The other ends of trachea 1 60 and trachea 2 70 are provided with a cutter head.
[0029] The cutter head includes an axial air path interface 901, a lateral air path interface 902, a lateral air path connecting pipe 903, an axial air path connecting pipe 904, a feed assembly, an inner cutter tube 908 and an outer cutter tube 912 at one end of which is arranged in the outer shell. A sample collecting chamber 914 is provided on the outer shell of the cutter head. The outer cutter tube 912 is provided at one end outside the outer shell and is provided with a cutter tip 911. A cutter groove 910 is provided on the side of the outer cutter tube 912 behind the cutter tip 911. The cutter groove 910 is used to accommodate the sample to be peeled under vacuum suction. A partition is axially provided in the outer cutter tube 912, and a lower end air chamber 913 is provided below the partition. Lateral air holes 909 are distributed on the partition of the outer cutter tube 912, and the lower end air chamber 913 is connected to the lateral air holes 909. The inner cutter tube 908 is provided on the partition of the outer cutter tube 912, and a feed assembly is provided at the end of the inner cutter tube 908 away from the cutter tip 911.
[0030] The other end of the cutter head is provided with an axial air circuit interface 901 and a lateral air circuit interface 902, one end of the axial air circuit interface 901 is connected to the air pipe 60, the other end of the axial air circuit interface 901 is connected to the axial air circuit connecting pipe 904, the inner cutter tube 908 is sleeved on the axial air circuit connecting pipe 904, one end of the lateral air circuit interface 902 is connected to the air pipe 70, the other end of the lateral air circuit interface 902 is connected to the lateral air circuit connecting pipe 903, and the lateral air circuit connecting pipe 903 is connected to the lower end air chamber 913.
[0031] The feed assembly includes a feed drive screw 905, a feed drive nut 906 and a peeling drive gear 907. Both ends of the feed drive screw 905 are rotatably connected to the inner wall of the shell. A feed drive nut 906 is provided on the side of the feed drive screw 905. The feed drive screw 905 is threadedly connected to the feed drive nut 906. A peeling drive gear 907 is provided on the feed drive nut 906. The peeling drive gear 907 is rotatably connected to the feed drive nut 906. The peeling drive gear 907 is sleeved on the side of the inner knife tube 908. The inner knife tube 908 can move forward and backward in the outer knife tube 912 and can rotate under the drive of the feed assembly to achieve cutting of the sample sucked into the knife groove 910.
[0032] The double-body combination valve 30 includes a mounting seat 16, a valve body 42, a connector 1 31, a connector 2 32 and a valve core 41. A mounting seat 16 is provided at one end of the valve body 42, and the mounting seat 16 is installed on the electromagnet mounting plate 14. A connector 1 31 and a connector 2 32 are provided at the other end of the valve body 42, and a valve core 41 is provided in each of the connector 1 31 and the connector 2 32.
[0033] The connector one 31 and the connector two 32 are both provided with an exhaust port 421, an air inlet 422 and a vacuum pressure relief port 423. The exhaust port 421 of the connector one 31 is connected to one end of the air pipe two 70, and the exhaust port 421 of the connector two 32 is connected to one end of the air pipe one 60. The air inlet 422 and the vacuum pressure relief port 423 of the connector one 31 are symmetrically distributed on the connector one 31 and are on the same central axis. The air inlet 422 and the vacuum pressure relief port 423 of the connector two 32 are symmetrically distributed on the connector two 32 and are on the same central axis.
[0034] The side of the valve core 41 is provided with two lateral holes, which are distributed along the circumference of the valve core 41 , and the included angle between the central axes of the two lateral holes of the valve core 41 is 120 degrees.
[0035] The self-holding rotating device includes a self-holding rotating electromagnet 13, a self-holding rotating electromagnet 2 17 and an electromagnet mounting plate 14. The self-holding rotating electromagnet 13 and the self-holding rotating electromagnet 2 17 are mounted on one side of the electromagnet mounting plate 14. A driving handle 15 is provided on the output shafts of the self-holding rotating electromagnet 13 and the self-holding rotating electromagnet 2 17.
[0036] The driving handle 15 passes through the mounting seat 16 and is arranged in the valve body 42. The two driving handles 15 are respectively arranged in cooperation with the two valve cores 41. The driving handle 15 drives the valve core 41 to rotate. When the valve core 41 is driven by the driving handle 15 to rotate clockwise in the connector 1 31 or the connector 2 32, the air suction port 421 and a lateral hole of the valve core 41 coincide with each other and are connected to the air inlet 422, and the vacuum pressure relief port 423 is closed. When rotating counterclockwise, the vacuum pressure relief port 423 coincides with another lateral hole of the valve core 41 and is connected to the air inlet 422, and the air suction port 421 is closed.
[0037] The vacuum pipeline breast biopsy peeling device described in the embodiment is connected to the peeling biopsy needle 90 to the main unit 10 when in use, the trachea 3 20 is inserted into the air inlet end of the vacuum barrel 11, the double-body combination valve 30 is inserted into the mounting seat 16 on the main unit 10, the peeling biopsy needle 90 is installed in the driving handle 80, and the peeling biopsy needle 90 is inserted below the patient's lesion. The knife groove 910 is aligned with the tissue to be sampled, and the key is activated to start sampling. The microprocessor on the main control unit controls the H-bridge motor driver DRV8876PWPR chip to start the self-holding rotating electromagnet 13 and the self-holding rotating electromagnet 2 17 to start forward and energize for 0.1s. The self-holding rotating electromagnet 13 and the self-holding rotating electromagnet 2 17 rotate forward, and the axial air path and the lateral air path of the knife groove 910 are both opened, the sample is sucked into the knife groove 910 and fixed, and the inner knife tube 908 is advanced and peeled. When the inner knife tube 908 advances to the front end to close the knife groove 910, the sample is completed. Cutting, the self-holding rotating electromagnet 217 starts and retreats for 0.1s, the lateral air path switches to the vacuum pressure relief port 423, and the air enters from the vacuum pressure relief port 423, and enters the knife groove 910 through the air pipe 270, the lateral air path interface 902, the lateral air path connecting pipe 903, the lower end air chamber 913, and the lateral air hole array 909. At this time, the inner knife tube 908 passes through the axial air path connecting pipe 904, the axial air path interface 901, the air pipe 160, and the connector 1 31. The trachea 20 is connected to the vacuum barrel 11. Under the action of the pressure difference, the sample is sucked out of the patient's body through the inner knife tube 908 and is blocked in the sample collection chamber 914. The button triggers the inner knife tube 908 to retract, and the sample is blocked in the sample collection chamber 914 by the axial air path connecting tube 904. When the inner knife tube 908 is completely withdrawn, the sample is pushed out of the inner knife tube 908 and exposed to the sample collection chamber 914. The self-holding rotating electromagnet 13 is started and then energized for 0.1s, and the axial air path is closed. At this time, the main unit 10 and the vacuum barrel 11 are disconnected from the air path connection with the rotary biopsy needle 90 through the double-body combination valve 30, and the main unit 10 and the vacuum barrel 11 are in a pressure-maintaining state. The next sampling can be carried out after the sample in the sample collection chamber 914 is manually taken away.
[0038] The parts of the present invention that are not described in detail are prior art. Although the present invention is specifically demonstrated and introduced in conjunction with the preferred implementation scheme, there are many methods and ways to implement the technical solution. The above is only a preferred implementation scheme of the present invention. However, technical personnel in the relevant field should understand that various changes can be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined in the attached claims, which are all within the scope of protection of the present invention.
Claims
1. A vacuum pipeline breast biopsy peeling device, comprising a main unit (10), a main control unit, a human-machine interface (12), a vacuum barrel (11), a self-holding rotating device, a peeling biopsy needle (90) and a driving handle (80), wherein the human-machine interface (12) is provided on the side of the main unit (10), and characterized in that: A main control unit and a self-holding rotating device are arranged in a main unit (10); the main control unit is electrically connected to the self-holding rotating device and a driving handle (80) via a self-holding driving circuit; a rotary biopsy needle (90) is mounted on the driving handle (80); an electromagnet mounting plate (14) is provided on the self-holding rotating device; the self-holding rotating device is fixed to the inside of the main unit via the electromagnet mounting plate (14); a vacuum barrel (11) is provided above the main unit (10); an outlet of the vacuum barrel (11) is connected to a vacuum pump; and an inlet of the vacuum barrel (11) is connected to the rotary biopsy needle (90) via a trachea three (20).
2. The vacuum tube breast biopsy peeling device according to claim 1, characterized in that: The rotary biopsy needle (90) comprises a blade head, trachea 1 (60), trachea 2 (70) and a double-body combination valve (30), wherein the double-body combination valve (30) is mounted on an electromagnet mounting plate (14), trachea 1 (60) and trachea 2 (70) are provided on the double-body combination valve (30), and the other ends of trachea 1 (60) and trachea 2 (70) are provided with a blade head.
3. The vacuum tube breast biopsy peeling device according to claim 2, characterized in that: The cutter head comprises an axial gas path interface (901) installed in the shell, a lateral gas path interface (902), a lateral gas path connecting pipe (903), an axial gas path connecting pipe (904), a cutter feed assembly, an inner cutter tube (908) and an outer cutter tube (912) at one end of which is arranged in the shell, the shell of the cutter head is provided with a sample collection chamber (914), the outer cutter tube (912) is provided with a cutter tip (911) at one end outside the shell, and the cutter tip (911) is provided at the rear A knife groove (910) is provided on the side of the square outer knife tube (912), a partition is axially provided inside the outer knife tube (912), a lower end air chamber (913) is provided below the partition, lateral air holes (909) are distributed on the partition of the outer knife tube (912), the lower end air chamber (913) is communicated with the lateral air holes (909), the inner knife tube (908) is arranged on the partition of the outer knife tube (912), and a knife feed assembly is provided at one end of the inner knife tube (908) away from the knife tip (911).
4. The vacuum tube breast biopsy peeling device according to claim 3, characterized in that: The other end of the cutter head is provided with an axial gas path interface (901) and a lateral gas path interface (902); one end of the axial gas path interface (901) is in communication with gas pipe 1 (60); the other end of the axial gas path interface (901) is in communication with an axial gas path connecting pipe (904); the inner cutter tube (908) is sleeved on the axial gas path connecting pipe (904); one end of the lateral gas path interface (902) is in communication with gas pipe 2 (70); the other end of the lateral gas path interface (902) is in communication with a lateral gas path connecting pipe (903); and the lateral gas path connecting pipe (903) is in communication with a lower end air chamber (913).
5. The vacuum tube breast biopsy peeling device according to claim 3, characterized in that: The feed assembly comprises a feed drive screw (905), a feed drive nut (906) and a peeling drive gear (907); both ends of the feed drive screw (905) are rotatably connected to the inner wall of the housing; a feed drive nut (906) is provided on the side of the feed drive screw (905); the feed drive screw (905) and the feed drive nut (906) are threadedly connected; a peeling drive gear (907) is provided on the feed drive nut (906); the peeling drive gear (907) and the feed drive nut (906) are rotatably connected; and the peeling drive gear (907) is sleeved on the side of the inner knife tube (908).
6. The vacuum tube breast biopsy peeling device according to claim 2, characterized in that: The double-body combination valve (30) comprises a mounting seat (16), a valve body (42), a first connector (31), a second connector (32) and a valve core (41); one end of the valve body (42) is provided with a mounting seat (16), the mounting seat (16) being mounted on an electromagnet mounting plate (14); the other end of the valve body (42) is provided with a first connector (31) and a second connector (32); and the first connector (31) and the second connector (32) are both provided with valve cores (41).
7. The vacuum tube breast biopsy peeling device according to claim 6, characterized in that: The connector one (31) and the connector two (32) are both provided with an air suction port (421), an air inlet (422) and a vacuum pressure relief port (423); the air suction port (421) of the connector one (31) is connected to one end of the air pipe two (70); the air suction port (421) of the connector two (32) is connected to one end of the air pipe one (60); the air inlet (422) and the vacuum pressure relief port (423) of the connector one (31) are symmetrically distributed on the connector one (31) and are on the same central axis; the air inlet (422) and the vacuum pressure relief port (423) of the connector two (32) are symmetrically distributed on the connector two (32) and are on the same central axis.
8. The vacuum tube breast biopsy peeling device according to claim 6, characterized in that: The valve core (41) has two lateral holes on its side, the lateral holes being distributed along the circumference of the valve core (41), and the included angle between the central axes of the lateral holes of the valve core (41) is 120 degrees.
9. The vacuum tube breast biopsy peeling device according to claim 1, characterized in that: The self-holding rotating device comprises a self-holding rotating electromagnet 1 (13), a self-holding rotating electromagnet 2 (17) and an electromagnet mounting plate (14); the self-holding rotating electromagnet 1 (13) and the self-holding rotating electromagnet 2 (17) are mounted on one side of the electromagnet mounting plate (14); and a driving handle (15) is provided on the output shafts of the self-holding rotating electromagnet 1 (13) and the self-holding rotating electromagnet 2 (17).
10. The vacuum tube breast biopsy peeling device according to claim 9, characterized in that: The driving handle (15) passes through the mounting seat (16) and is arranged in the valve body (42). The two driving handles (15) are respectively arranged in cooperation with the two valve cores (41). The driving handles (15) drive the valve core (41) to rotate.