A water jet medical pump

Abstract

The present invention belongs to the technical field of medical devices, and in particular, relates to a water jet medical pump. The present invention arranges two elastic rods at intervals on a piston connector, which can be snap-fitted with a connecting protrusion to achieve quick connection between the piston and a pump unit driving device, and utilizes a clamp driving device to drive the clamp to open and close to clamp or release the pump unit, thereby achieving quick disassembly and assembly of the pump unit; more importantly, by fixing a piston separator on a housing, the piston separator can be inserted between the two elastic rods to stretch the two elastic rods apart, thereby achieving the purpose of releasing the piston by the piston connector, realizing control of an odd-numbered piston cylinder pump unit, providing a solution for a pump unit with an odd-numbered piston cylinder of more than two cylinders, improving the efficiency and stability of the water jet medical pump, avoiding the shutdown problem caused by a failure of one of the two piston cylinders, and effectively ensuring the medical safety of the water jet medical pump of the present invention.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a water jet medical pump. Background Art

[0002] Water jet surgery requires the use of a water knife, and the pump unit provides high-pressure water for the water knife. In order to ensure the sterility of the pump unit, the current pump unit is a disposable item. Realizing rapid assembly and precise control of the pump unit is of great significance to treatment.

[0003] Chinese patent document CN101677825 (CN200780041877.3) discloses a medical pump used in particular in water jet surgery, in which the connection between the pump unit and the pump actuator is improved and the operability of the pump is simplified. However, in the case of "standard" actuation of the pump unit, the mandrel moves back and forth alternately, and the retaining block of the piston clamp on the end of the mandrel frequently and alternately moves over the tongue and the split joystick, which easily leads to wear and fall-off of the retaining block, tongue and split joystick, and generates noise, which is not conducive to the doctor's focused work in a medical environment. In addition, due to the above-mentioned actuation principle, the cylinders of the medical pump must be used in pairs, so it is only applicable to medical pumps with an even number of cylinders, and the scope of application is narrow. Summary of the invention

[0004] The main purpose of the present invention is to provide a water jet medical pump. By fixing a piston separator on the shell, the purpose of releasing the piston by the piston connector can be achieved, thereby realizing the control of the odd-numbered piston cylinder pump unit and providing a solution for the implementation of the odd-numbered piston cylinder pump unit with more than two cylinders.

[0005] The technical problem to be solved by the present invention is achieved by the following technical solution: a water jet medical pump, comprising a housing, a pump unit, a pump unit clamping device and a pump unit driving device, wherein the pump unit clamping device and the pump unit driving device are fixedly arranged on the housing in sequence from front to back; the pump unit comprises a piston cylinder, a piston is arranged in the piston cylinder, and further comprises a piston connector and a piston separator;

[0006] The pump unit driving device is used to drive the piston connector to move forward and backward relative to the housing. The piston connector is provided with two elastic rods arranged at intervals. The rear end of the piston is provided with a connecting protrusion, and the connecting protrusion can be inserted and stuck between the two elastic rods.

[0007] The piston separator is fixedly arranged on the housing, and the piston separator can be inserted into and spread apart the two elastic rods so that the piston connector releases the piston;

[0008] The pump unit clamping device comprises a clamping jaw and a clamping jaw driving device, wherein the clamping jaw driving device is used to drive the clamping jaw to open and close so as to clamp or release the pump unit.

[0009] Beneficial effects of the present invention: The present invention arranges two elastic rods at intervals on the piston connector, which can be clamped together with the connecting protrusion, so as to realize the rapid connection between the piston and the pump unit driving device, and uses the clamp driving device to drive the clamp to open and close, so as to clamp or release the pump unit, so as to realize the rapid disassembly and assembly of the pump unit;

[0010] More importantly, by fixing the piston separator on the shell, it is possible to insert the two elastic rods between them to stretch them apart, thereby achieving the purpose of releasing the piston by the piston connector, realizing the control of the odd-numbered piston pump unit, and providing a solution for the implementation of pump units with odd-numbered piston cylinders of more than two cylinders. It can improve the efficiency and stability of the water jet medical pump, avoid the shutdown problem caused by a failure of one of the two piston cylinders, and effectively ensure medical safety.

[0011] The technical solution of the present invention is also as follows: the piston separator is located at the front side of the movement path of the piston connector when the pump unit is working normally, and the piston separator includes a separation block arranged corresponding to the elastic rod, and the separation block is used to insert and spread the two elastic rods. The piston separator is arranged at the front side of the movement path of the piston connector when the pump unit is working normally, so as to avoid the piston connector driving the pump unit to work normally and colliding with the piston separator, thereby avoiding noise and wear of parts.

[0012] The technical solution of the present invention is also as follows: the pump unit includes a water inlet chamber and a water outlet chamber separated from each other; the piston cylinder is connected to the water inlet chamber through a water inlet check valve, and the water inlet check valve is used to make the water inlet chamber unidirectionally pass to the piston cylinder; the piston cylinder is connected to the water outlet chamber through a water outlet check valve, and the water outlet check valve is used to make the piston cylinder unidirectionally pass to the water outlet chamber. The unidirectional passage from the water inlet chamber to the piston cylinder is achieved by setting the water inlet check valve, and the unidirectional passage from the piston cylinder to the water outlet chamber is achieved by setting the water outlet check valve, thereby achieving the function of the piston cylinder pumping water from the water inlet chamber and discharging water to the water outlet chamber.

[0013] The technical solution of the present invention also includes: the clamping jaws include an upper clamping jaw and a lower clamping jaw that are arranged relatively, the pump unit is provided with a slot that matches the upper clamping jaw and the lower clamping jaw, and the clamping jaw driving device is used to drive the upper clamping jaw and the lower clamping jaw to move relative to each other and to be inserted into the slot, and to drive the upper clamping jaw and the lower clamping jaw to move backward and out of the slot. By providing the upper and lower clamping jaws that match the slot on the pump unit, the pump unit can be quickly fixed and released, and the structure is simple.

[0014] The technical solution of the present invention also includes: a first laser displacement sensor and a control unit, wherein the control unit is fixedly arranged on the housing;

[0015] The first laser displacement sensor is fixedly arranged on the housing relative to the insertion direction of the pump unit;

[0016] The control unit is electrically connected to the first laser displacement sensor, the pump unit drive device, and the clamp drive device respectively. The first laser displacement sensor is used to monitor the position information of the pump unit and transmit it to the control unit. The control unit is used to control the actions of the clamp drive device and the pump unit drive device. The first laser displacement sensor is set to monitor whether the pump unit is installed in place. If it is monitored that the pump unit is installed in place, the control unit can control the clamp drive device to drive the clamp to clamp the pump unit according to the position information of the pump unit monitored by the first laser displacement sensor. If the pump unit needs to be released, the control unit can control the clamp drive device to drive the clamp to release the pump unit. The control unit can also be used to control the pump unit drive device to run or stop, and can control the running direction and running speed of the pump unit drive device.

[0017] The technical solution of the present invention also includes: the pump unit driving device includes a driving linear module, the driving linear module uses a belt linear module or a screw linear module, the driving linear module includes a driving linear guide and a driving slider, the driving slider can be slid forward and backward on the driving linear guide, the piston connector is fixedly connected to the driving slider, the driving linear module is electrically connected to the control unit, and the control unit is used to control the action of the driving linear module. The pump unit driving device uses a belt linear module or a screw linear module. Since the belt linear module and the screw linear module have fast movement speed and high repeatability positioning accuracy, the control of the piston movement is more flexible and efficient, thereby improving the working efficiency and accuracy of the pump unit, and the structure is compact, which is conducive to space layout.

[0018] The technical solution of the present invention also includes: the driving linear module is provided with a grating ruler, the grating ruler is electrically connected to the control unit, the grating ruler is used to monitor the displacement of the driving linear module and transmit it to the control unit, the control unit can adjust the action of the driving linear module according to the displacement of the driving linear module monitored by the grating ruler, and ensure the precise control of the piston movement by adjusting the running speed or direction of the driving linear module. By setting the grating ruler, the specific position and movement speed of the driving slider can be accurately monitored, and the control accuracy of the driving linear module on the piston movement is improved.

[0019] The technical solution of the present invention also includes: a second laser displacement sensor, a piston rod is arranged between the piston and the connecting protrusion, a second laser displacement sensor is arranged vertically and directly with respect to each movement path of the piston rod, and the second laser displacement sensor is fixedly arranged on the housing;

[0020] The second laser displacement sensor is electrically connected to the control unit, and is used to monitor the position information and movement speed of the piston rod and transmit them to the control unit. The second laser displacement sensor is used to monitor whether the piston is carried when the pump unit is installed and whether the movement speed of the piston during operation is consistent with the movement speed of the driving slider, so as to avoid leakage caused by missing the piston and damage to the circuit equipment or the piston falling off the piston connector to affect the medical operation, so as to make the water jet medical pump of the present invention safer and more reliable.

[0021] The technical solution of the present invention also includes: a control switch, which is electrically connected to the control unit, and is used to send information about the operation or stop of the pump unit to the control unit. The control switch sends a signal to the control unit to operate the pump unit or to stop the pump unit and disassemble the pump unit, so as to control the action of the water jet medical pump.

[0022] The technical solution of the present invention also includes: the control switch includes a wired foot switch or a wireless foot switch or a button switch. The wired foot switch or the wireless foot switch or the button switch is selected according to the actual medical needs, so as to be more conducive to the operation of the equipment and improve the convenience of use, thereby ensuring the high efficiency and safety of treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the pump unit of the present invention;

[0024] Figure 2 This is a schematic structural diagram of the water jet medical pump described in Example 1 of the present invention;

[0025] Figure 3 It is a schematic structural diagram of the pump unit clamping device of the present invention;

[0026] Figure 4 It is a schematic diagram of the positional relationship between the piston connector and the piston separator when the piston is not connected according to the present invention;

[0027] Figure 5 It is a schematic diagram of the positional relationship between the piston connector and the piston separator when the piston is separated from the piston connector according to the present invention;

[0028] Figure 6 This is a schematic diagram of the structure when the connecting protrusion of the present invention is connected to the piston connector;

[0029] Figure 7 It is a schematic diagram of the structure when the connecting protrusion and the piston connector of the present invention are separated;

[0030] Figure 8 It is a schematic structural diagram of a pump unit clamping device and a pump unit driving device when the pump unit of the present invention is not installed;

[0031] Fig. 9 It is a schematic diagram of the structure of the pump unit clamping device and the pump unit driving device after the pump unit of the present invention is installed;

[0032] Fig.10 This is a schematic diagram of the connection structure between the connecting protrusion and the piston connector according to Example 2 of the present invention;

[0033] Fig.11 This is a schematic structural diagram of the water jet medical pump described in Example 3 of the present invention;

[0034] In the figure, 100 is a housing, 101 is a control unit;

[0035] 1 pump unit, 2 pump unit clamping device, 3 pump unit driving device, 4 piston cylinder, 5 piston, 6 piston rod, 61 connecting protrusion, 611 limiting groove;

[0036] 7 support frame, 8 first linear module, 81 first slide block;

[0037] 9 second linear module, 91 second slider;

[0038] 10 upper clamping jaw, 11 lower clamping jaw, 12 limiting hole, 13 slot, 14 driving linear module, 141 driving linear guide rail, 142 driving slide block;

[0039] 15 piston connector, 151 insertion hole, 152 placement groove;

[0040] 16 pusher, 17 insert spring, 171 elastic rod;

[0041] 18 piston separator, 181 separation block, 1811 opening ramp;

[0042] 19 grating ruler, 191 scale ruler, 192 reading head;

[0043] 20 a first laser displacement sensor, 21 a second laser displacement sensor, 22 a water inlet chamber, 23 a water outlet chamber, 24 a water inlet check valve, 25 a water outlet check valve, 26 a control switch;

[0044] 201 clamping jaw, 202 clamping jaw driving device;

[0045] 221 water inlet, 231 water outlet. DETAILED DESCRIPTION

[0046] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] Example 1

[0048] like Figure 1 As shown, a water jet medical pump comprises a pump unit 1, wherein the pump unit 1 comprises a water inlet chamber 22, a water outlet chamber 23 and two piston cylinders 4 which are separated from each other, each of the piston cylinders 4 is connected with the water inlet chamber 22 via a water inlet check valve 24, and the water inlet check valve 24 is used to make the water inlet chamber 22 pass to the piston cylinder 4 in a one-way manner; each of the piston cylinders 4 is connected with the water outlet chamber 23 via a water outlet check valve 25, and the water outlet check valve 25 is used to make the piston cylinder 4 pass to the water outlet chamber 23 in a one-way manner, and a piston 5 which reciprocates along its axial direction is arranged in the piston cylinder 4, The piston 5 is connected to the piston rod 6. The end of the piston rod 6 away from the piston 5 is provided with a connecting protrusion 61 with a conical end. The connecting end surface diameter of the connecting protrusion 61 and the piston rod 6 is larger than the diameter of the piston rod 6. The water inlet chamber 22 is connected to a water source through a water inlet 221, and the water outlet chamber 23 is connected to a water knife through a water outlet 231. The two pistons 5 are controlled to slide back and forth alternately in the corresponding piston cylinders 4, so as to achieve the purpose of pumping water from one side of the water inlet chamber 22 to the piston cylinder 4 and injecting water into the water knife from the side of the water outlet chamber 23, and ensure the uninterrupted normal operation of the water knife.

[0049] like Figure 2 As shown, the water jet medical pump further includes a housing 100, a pump unit clamping device 2 and a pump unit driving device 3, wherein the pump unit clamping device 2 and the pump unit driving device 3 are fixedly arranged on the housing 100 in sequence from front to back.

[0050] like Figure 3 As shown, the pump unit clamping device 2 includes a support frame 7 fixedly arranged on the shell 100, an upper clamping jaw 10 and a lower clamping jaw 11 installed on the support frame 7 and can move up and down, the support frame 7 is provided with a limiting hole 12 matching the piston cylinder 4, the upper clamping jaw 10 and the lower clamping jaw 11 are relatively parallelly arranged on the front side of the limiting hole 12, and the upper and lower sides of the pump unit 1 are respectively provided with slots 13 matching the upper clamping jaw 10 and the lower clamping jaw 11.

[0051] like Figure 4-Figure 7As shown, the pump unit driving device 3 includes a piston connector 15, a pusher 16, and an insertion spring 17. The piston connector 15 is provided with an insertion hole 151 matching the connecting protrusion 61, and the insertion hole 151 is coaxially arranged with the limiting hole 12. The pusher 16 is fixedly connected to the piston connector 15 and is located behind the insertion hole 151. The piston connector 15 is provided with a seating groove 152, and the seating groove 152 is radially arranged along the insertion hole 151. The insertion spring 17 is inserted and fixed in the seating groove 152. The insertion spring 17 includes two elastic rods 171 with a spacing smaller than the diameter of the connecting end surface between the connecting protrusion 61 and the piston rod 6. The two elastic rods 171 are symmetrically arranged relative to the axis of the insertion hole 151. One end of the elastic rod 171 is fixedly arranged, and the other end is a free movable end. The free movable ends of the two elastic rods 171 are located on the same side.

[0052] like Figure 4 and Figure 5 As shown, a piston separator 18 is fixedly arranged between the piston connector 15 and the support frame 7. The piston separator 18 is located at the front side of the movement path of the piston connector 15 when the pump unit 1 is working normally. The piston separator 18 includes a separation block 181 arranged corresponding to the free movable end of the elastic rod 171. The separation block 181 is used to insert and open the two elastic rods 171. Specifically, the separation block 181 is symmetrically provided with opening inclined surfaces 1811 on the left and right sides. Along the direction from front to back, the opening inclined surfaces 1811 are inclined from outside to inside. When the separation block 181 is inserted between the two elastic rods 171, the free movable ends of the two elastic rods 171 open to both sides so that the distance between the two elastic rods 171 is increased.

[0053] The present invention arranges the piston separator 18 at the front side of the movement path of the piston connector 15 when the pump unit 1 is working normally. When the pump unit 1 is working normally, the piston separator 18 and the piston 5 are relatively fixed, and the piston connector 15 reciprocates back and forth, thereby increasing or decreasing the volume of the cavity formed by the piston 5 and the piston cylinder 4. During this process, the corresponding movement trajectory of the piston connector 15 is the "working interval"; when the pump unit 1 needs to be disassembled, the piston connector 15 moves to the front end of the "working interval" and then continues to move forward. When the piston connector 15 moves to the top of the piston separator 18, the separation block 181 is inserted between the two elastic rods 171 to open the two elastic rods 171, thereby releasing the piston 5. The movement trajectory of the piston connector 15 after it moves forward from the "working interval" is the "disassembly interval".

[0054] like Figure 2 As shown, the water jet medical pump further includes a first laser displacement sensor 20 and a control unit 101 , and the control unit 101 is fixedly disposed on the housing 100 .

[0055] A first laser displacement sensor 20 is arranged relative to the insertion direction of the pump unit 1 , and the first laser displacement sensor 20 is fixedly arranged on the housing 100 .

[0056] The control unit 101 is electrically connected to the first laser displacement sensor 20, the pump unit drive device 3, and the clamp drive device 202 respectively. The first laser displacement sensor 20 is used to monitor the position information of the pump unit 1 and transmit it to the control unit 101. The control unit 101 is used to control the actions of the clamp drive device 202 and the pump unit drive device 3.

[0057] like Figure 2 and Figure 3 As shown, the clamping jaw driving device 202 includes a first linear module 8 and a second linear module 9, the first linear module 8 is arranged on the right side of the support frame 7, and the second linear module 9 is arranged on the left side of the support frame 7, the first linear module 8 is used to control the upper clamping jaw 10 to move up and down, and the second linear module 9 is used to control the lower clamping jaw 11 to move up and down, and the first linear module 8 and the second linear module 9 are electrically connected to the control unit 101 respectively. The control unit 101 can control the first linear module 8 and the second linear module 9 to move according to the position information of the pump unit 1 monitored by the first laser displacement sensor 20.

[0058] The first linear module 8 is a screw linear module. The first linear module 8 includes a first slider 81 . The upper clamping jaw 10 is fixedly connected to the first slider 81 .

[0059] The second linear module 9 is a screw linear module. The second linear module 9 includes a second slider 91 . The lower clamping jaw 11 is fixedly connected to the second slider 91 .

[0060] like Figure 8 or Fig. 9 As shown, the water jet medical pump also includes a driving linear module 14, and the driving linear module 14 uses a screw linear module. The driving linear module 14 includes a driving linear guide 141 and a driving slider 142. The driving slider 142 is slidable back and forth on the driving linear guide 141. The piston connector 15 is fixedly connected to the driving slider 142 through a pusher 16. The driving linear module 14 is electrically connected to the control unit 101, and the control unit 101 is used to control the action of the driving linear module 14.

[0061] like Fig. 9 As shown, the driving linear module 14 is provided with a grating ruler 19, and the grating ruler 19 is used to monitor the displacement of the driving linear module 14. Specifically, Figure 8As shown, the grating ruler 19 includes a scale 191 and a reading head 192, the scale 191 is fixedly set on the housing 100, the scale 191 is arranged parallel to the driving linear guide 141, the reading head 192 is fixedly set on the driving slider 142, the reading head 192 is electrically connected to the control unit 101, and the control unit 101 can control the operating state of the pump unit 1 according to the displacement of the driving linear module 14 monitored by the grating ruler 19.

[0062] like Figure 8 or Fig. 9 As shown, the water jet medical pump further includes a second laser displacement sensor 21 , and a second laser displacement sensor 21 is arranged perpendicularly to the movement path of each piston rod 6 , and the second laser displacement sensor 21 is fixedly arranged on the housing 100 .

[0063] The second laser displacement sensor 21 is electrically connected to the control unit 101 . The second laser displacement sensor 21 is used to monitor the position information of the piston rod 6 and the movement speed of the piston rod 6 and transmit the information to the control unit 101 .

[0064] like Figure 2 As shown, the water jet medical pump further includes a control switch 26 , which is electrically connected to the control unit 101 , and is used to send information on whether the pump unit 1 is running or stopped to the control unit 101 .

[0065] The control switch 26 is provided with both a wired foot switch and a wireless foot switch.

[0066] Working principle:

[0067] like Figure 1 As shown, the pump unit 1 is provided with a water inlet check valve 24 and a water outlet check valve 25 in the piston cylinder 4. When the piston 5 is pulled backward, water enters the piston cylinder 4 from the water inlet chamber 22, and when the piston 5 is pushed forward, water enters the water outlet chamber 23 from the piston cylinder 4. The change of the water flow velocity and the water flow pressure is achieved by controlling the running speed of the driving linear module 14.

[0068] (1) When installing the pump unit 1, the piston connector 15 is located at the initial position of the "working interval". The initial position of the "working interval" mentioned here is the position of the piston connector 15 when the piston 5 is connected to the piston connector 15 and the piston 5 is in contact with the bottom of the piston cylinder 4, that is, when the volume of the cavity formed by the piston 5 and the piston cylinder 4 is the smallest; the upper clamping jaw 10 is located at the upper end of the stroke of the first linear module 8, and the lower clamping jaw 11 is located at the lower end of the stroke of the second linear module 9. The pump unit 1 is inserted into the limiting hole 12. The limiting hole 12 plays a role in guiding and supporting the pump unit 1. The connecting protrusion 61 first contacts the piston connector 15, and the connecting protrusion 61 opens to both sides by squeezing the elastic rod 171. When the connecting protrusion 61 passes over the elastic rod 171, as shown in Figure 6 As shown, the elastic rod 171 rebounds to clamp the piston rod 6 in the insertion hole 151. The elastic rod 171 can limit the forward movement of the connecting protrusion 61. The pusher 16 behind the insertion hole 151 is used to limit the backward movement of the connecting protrusion 61, thereby realizing the connection between the piston 5 and the piston connector 15.

[0069] At the same time, the first laser displacement sensor 20 detects that the pump unit 1 is installed in place, and the control unit 101 controls the first linear module 8 and the second linear module 9 to respectively drive the upper clamp 10 and the lower clamp 11 to move, and accurately snap into the slot 13, thereby fixing the pump unit 1, and giving an indication of the pump unit 1 starting to run by controlling the switch 26, that is, controlling the linear module 14 to drive the piston 5 to reciprocate back and forth in the piston cylinder 4, thereby realizing the functions of pumping and draining water, and achieving different water flow pressures by adjusting the running speed of the piston 5.

[0070] (2) When the pump unit 1 is disassembled, the control switch 26 is used to give an instruction to stop the pump unit 1, the control unit 101 controls the first linear module 8 to drive the upper clamping jaw 10 to move upward to the initial state, the second linear module 9 drives the lower clamping jaw 11 to move downward to the initial state, the pump unit clamping device 2 releases the pump unit 1 body, drives the linear module 14 to push the piston connector 15 forward to the outside of the "working interval", so that the piston connector 15 moves to the top of the piston separator 18, and under the action of the opening inclined surface 1811, when the distance between the two elastic rods 171 is greater than the connecting end surface diameter of the connecting protrusion 61 and the piston rod 6, as shown in FIG. Figure 5 and Figure 7 As shown, at this time, the pump unit 1 body can be pulled out from the limiting hole 12 and the piston rod 6 can be pulled out from the insertion hole 151. When the second laser displacement sensor 21 detects that the piston rod 6 is pulled out, it drives the linear module 14 to control the piston connector 15 to return to the initial position of the "working interval" to facilitate the next assembly of the pump unit 1.

[0071] Example 2

[0072] like Fig.10As shown, the difference from Example 1 is that two elastic rods 171 arranged at intervals are fixedly provided on the piston connector 15, one end of the elastic rod 171 is fixedly provided, and the other end is a free movable end, and the free movable ends of the two elastic rods 171 are located on the same side, and the connecting protrusion 61 is provided with a limiting groove 611 matching the elastic rod 171 along its radial direction, the width of the limiting groove 611 is equal to the outer diameter of the elastic rod 171, the outer diameter of the connecting protrusion 61 is greater than the distance between the two elastic rods 171, and the rear end surface of the connecting protrusion 61 is provided with a conical chamfer, when the rear end surface of the connecting protrusion 61 contacts the elastic rod 171, the two elastic rods 171 can be opened, when the connecting protrusion 61 is pushed to the position corresponding to the elastic rod 171 and the limiting groove 611, the two elastic rods 171 are stuck in the limiting groove 611 under the action of their own elastic force, thereby realizing the connection between the piston connector 15 and the piston 5, ensuring that the piston 5 and the piston connector 15 move forward and backward synchronously, and the structure is simpler and more reliable.

[0073] Example 3

[0074] like Fig.11 As shown, the difference from Example 1 is that the pump unit 1 is provided with three parallel piston cylinders 4, and three corresponding driving linear modules 14 are provided for driving the three pistons 5 to move alternately in their respective piston cylinders 4. Compared with the two pistons 5 in Example 1 that move alternately back and forth to convey high-pressure fluid, under the premise that the diameter and length of the piston cylinders 4 are the same and the running speed of the pistons 5 is the same, the fluid output by the pump unit 1 is more efficient within the same time. When one of the driving linear modules 14 fails and cannot work, the remaining two driving linear modules 14 can still realize the basic functions of the pump unit 1, and the stability and safety are higher.

Claims

1. A water jet medical pump, comprising a housing (100), a pump unit (1), a pump unit clamping device (2) and a pump unit driving device (3), wherein the pump unit clamping device (2) and the pump unit driving device (3) are fixedly arranged on the housing (100) in sequence from front to back; the pump unit (1) comprises a piston cylinder (4), wherein a piston (5) is arranged in the piston cylinder (4), and the characteristics are as follows: Also included is a piston connector (15) and a piston separator (18); The pump unit driving device (3) is used to drive the piston connector (15) to move forward and backward relative to the housing (100); the piston connector (15) is provided with two elastic rods (171) arranged at intervals; a connecting protrusion (61) is provided at the rear end of the piston (5); the connecting protrusion (61) can be inserted into and clamped between the two elastic rods (171); The piston separator (18) is fixedly arranged on the housing (100), and the piston separator (18) is capable of inserting and spreading the two elastic rods (171) so that the piston connector (15) releases the piston (5); The pump unit clamping device (2) comprises a clamping jaw (201) and a clamping jaw driving device (202), wherein the clamping jaw driving device (202) is used to drive the clamping jaw (201) to open or close, so as to clamp or release the pump unit (1); The piston separator (18) is located at the front side of the movement path of the piston connector (15) when the pump unit (1) is working normally. The piston separator (18) comprises a separation block (181) arranged corresponding to the elastic rod (171). The separation block (181) is used to insert and spread the two elastic rods (171). The separation block (181) is symmetrically provided with opening inclined surfaces (1811) on the left and right sides. In the direction from front to back, the opening inclined surfaces (1811) are inclined from outside to inside. When the piston connector (15) moves to the top of the piston separator (18), the separation block (181) is inserted between the two elastic rods (171) to spread the two elastic rods (171). The pump unit (1) comprises a water inlet chamber (22) and a water outlet chamber (23) which are separated from each other; the piston cylinder (4) is connected to the water inlet chamber (22) via a water inlet check valve (24); the water inlet check valve (24) is used to enable the water inlet chamber (22) to flow toward the piston cylinder (4) in a one-way manner; the piston cylinder (4) is connected to the water outlet chamber (23) via a water outlet check valve (25); the water outlet check valve (25) is used to enable the piston cylinder (4) to flow toward the water outlet chamber (23) in a one-way manner; The pump unit drive device (3) comprises a drive linear module (14); the pump unit (1) is provided with three parallel piston cylinders (4), and three drive linear modules (14) are correspondingly provided; when one of the drive linear modules (14) fails and cannot work, the remaining two drive linear modules (14) can still realize the basic functions of the pump unit (1).

2. The water jet medical pump according to claim 1, characterized in that: The clamping jaw (201) comprises an upper clamping jaw (10) and a lower clamping jaw (11) which are arranged opposite to each other. The pump unit (1) is provided with a slot (13) matching the upper clamping jaw (10) and the lower clamping jaw (11). The clamping jaw driving device (202) is used to drive the upper clamping jaw (10) and the lower clamping jaw (11) to move relative to each other and to be clamped into the slot (13), and to drive the upper clamping jaw (10) and the lower clamping jaw (11) to move backward and forward and to be released from the slot (13).

3. The water jet medical pump according to claim 1, characterized in that: It also includes a first laser displacement sensor (20) and a control unit (101), wherein the control unit (101) is fixedly arranged on the housing (100); The first laser displacement sensor (20) is fixedly arranged on the housing (100) relative to the insertion direction of the pump unit (1); The control unit (101) is electrically connected to the first laser displacement sensor (20), the pump unit drive device (3), and the clamping jaw drive device (202), respectively; the first laser displacement sensor (20) is used to monitor the position information of the pump unit (1) and transmit it to the control unit (101); and the control unit (101) is used to control the actions of the clamping jaw drive device (202) and the pump unit drive device (3).

4. The water jet medical pump according to claim 3, characterized in that: The driving linear module (14) is a belt linear module or a screw linear module. The driving linear module (14) comprises a driving linear guide rail (141) and a driving slider (142). The driving slider (142) is slidably arranged on the driving linear guide rail (141). The piston connector (15) is fixedly connected to the driving slider (142). The driving linear module (14) is electrically connected to a control unit (101). The control unit (101) is used to control the action of the driving linear module (14).

5. The water jet medical pump according to claim 4, characterized in that: The driving linear module (14) is provided with a grating ruler (19), the grating ruler (19) is electrically connected to the control unit (101), and the grating ruler (19) is used to monitor the displacement of the driving linear module (14) and transmit it to the control unit (101).

6. The water jet medical pump according to claim 2, characterized in that: It also includes a second laser displacement sensor (21), a piston rod (6) is provided between the piston (5) and the connecting protrusion (61), a second laser displacement sensor (21) is provided perpendicularly to the movement path of each piston rod (6), and the second laser displacement sensor (21) is fixedly arranged on the housing (100); The second laser displacement sensor (21) is electrically connected to the control unit (101), and the second laser displacement sensor (21) is used to monitor the position information of the piston rod (6) and the movement speed of the piston rod (6) and transmit the information to the control unit (101).

7. The water jet medical pump according to claim 3, characterized in that: It also comprises a control switch (26), wherein the control switch (26) is electrically connected to the control unit (101), and the control switch (26) is used to send information on whether the pump unit (1) is running or stopped to the control unit (101).

8. The water jet medical pump according to claim 7, characterized in that: The control switch (26) comprises a wired foot switch or a wireless foot switch or a push button switch.

Images