CN113974782A

CN113974782A - Water jet medical pump

Info

Publication number: CN113974782A
Application number: CN202111327857.0A
Authority: CN
Inventors: 刘枫; 苏叶青
Original assignee: Shandong Huabo Electric Co ltd
Current assignee: Shandong Huabo Electric Co ltd
Priority date: 2021-11-10
Filing date: 2021-11-10
Publication date: 2022-01-28

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a water jet scalpel medical pump.A piston connector is provided with two elastic rods at intervals, and can be clamped with a connecting protrusion to realize the quick connection of a piston and a pump unit driving device; more importantly, the piston separator is fixedly arranged on the shell and can be inserted between the two elastic rods to prop the two elastic rods, so that the purpose that the piston connector releases the piston is achieved, the control of the odd piston cylinder pump unit is realized, a solution is provided for the pump unit of the odd piston cylinder with more than two cylinders, the efficiency and the stability of the water jet scalpel medical pump can be improved, the problem of shutdown caused by the failure of one of the two piston cylinders is avoided, and the medical safety of the water jet scalpel medical pump is effectively ensured.

Description

Water jet medical pump

Technical Field

The invention belongs to the technical field of medical instruments, and particularly relates to a water jet medical pump.

Background

The water jet scalpel is needed to be used in the water jet surgery, the pump unit provides high-pressure water for the water jet scalpel, the existing pump unit is a disposable product in order to guarantee the sterility of the pump unit, and the rapid assembly and the accurate control of the pump unit are realized, so that the pump unit has important significance for treatment.

Chinese patent document CN101677825(CN200780041877.3) discloses a medical pump, in particular for use in water jet surgery, wherein the connection between the pump unit and the pump actuating means is improved and the operability of the pump is simplified. However, in the case of "standard" actuation of the pump unit, the mandrel is moved back and forth alternately, the retaining blocks of the piston holder on the end of the mandrel frequently move alternately over the tongues and the split levers, which is very likely to cause wear and tear of the retaining blocks, tongues and split levers, and which generates noise, which is not conducive to the intensive work of the doctor in a medical environment. In addition, due to the above actuation principle, the cylinders of the medical pump must be used in pairs, and therefore, the medical pump is only suitable for the medical pump with an even number of cylinders, and the application range is narrow.

Disclosure of Invention

The invention mainly aims to provide a water jet medical pump, which can achieve the aim of releasing a piston by a piston connector by fixedly arranging a piston separator on a shell, realizes the control of a pump unit with a single piston cylinder and provides a solution for the implementation of the pump unit with more than two single piston cylinders.

The technical problem to be solved by the invention is realized by adopting the following technical scheme: a water jet scalpel medical pump comprises a shell, 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 shell from front to back in sequence; the pump unit comprises a piston cylinder, a piston connector and a piston separator, wherein the piston cylinder is internally provided with the piston;

the pump unit driving device is used for driving the piston connector to move back and forth relative to the shell, two elastic rods which are arranged at intervals are arranged on the piston connector, and a connecting protrusion is arranged at the rear end of the piston and can be inserted and clamped between the two elastic rods;

the piston separator is fixedly arranged on the shell and can be inserted into and spread the two elastic rods so as to enable the piston connector to release the piston;

the pump unit clamping device comprises a clamping jaw and a clamping jaw driving device, and the clamping jaw driving device is used for driving the clamping jaw to open and close so as to clamp or release the pump unit.

The invention has the beneficial effects that: according to the invention, the two elastic rods are arranged on the piston connector at intervals and can be clamped with the connecting protrusion together, so that the piston is quickly connected with the pump unit driving device, and the clamping jaw driving device is used for driving the clamping jaw to open and close so as to clamp or release the pump unit, so that the pump unit is quickly assembled and disassembled;

more importantly, the piston separator is fixedly arranged on the shell, the two elastic rods can be inserted between the two elastic rods to be propped open, so that the purpose of releasing the piston by the piston connector is achieved, the control on the odd piston pump unit is realized, a solution is provided for implementation of the pump unit of the odd piston cylinder with more than two cylinders, the efficiency and the stability of the water jet scalpel medical pump can be improved, the problem of shutdown caused by the failure of one of the two piston cylinders is avoided, and the medical safety is effectively ensured.

The technical scheme of the invention is as follows: the piston separator is positioned on the front side of the movement path of the piston connector when the pump unit works normally, and comprises a separation block which is arranged corresponding to the elastic rods and is used for inserting and expanding the two elastic rods. The piston separator is arranged on the front side of the motion path of the piston connector when the pump unit normally works, so that the piston connector is prevented from colliding with the piston separator when the pump unit is driven by the piston connector to normally work, and noise and abrasion of parts are avoided.

The technical scheme of the invention is as follows: the pump unit comprises a water inlet cavity and a water outlet cavity which are separated from each other, the piston cylinder is communicated with the water inlet cavity through a water inlet check valve, and the water inlet check valve is used for enabling the water inlet cavity to be communicated with the piston cylinder in a one-way mode; the piston cylinder is communicated with the water outlet cavity through a water outlet check valve, and the water outlet check valve is used for enabling the piston cylinder to be communicated with the water outlet cavity in a one-way mode. The one-way conduction of the water inlet cavity to the piston cylinder is realized by arranging the water inlet check valve, and the one-way conduction of the piston cylinder to the water outlet cavity is realized by arranging the water outlet check valve, so that the functions of pumping water from the water inlet cavity and draining water to the water outlet cavity of the piston cylinder are realized.

The technical scheme of the invention is as follows: the clamping jaw is including relative last clamping jaw and the lower clamping jaw that sets up, the pump unit is provided with the draw-in groove that matches with last clamping jaw and lower clamping jaw, clamping jaw drive arrangement is used for driving in clamping jaw and lower clamping jaw relative motion card go into in the draw-in groove to and be used for driving in clamping jaw and lower clamping jaw to move backward and deviate from in the draw-in groove. The upper clamping jaw and the lower clamping jaw are matched with the clamping grooves in the pump unit, so that the pump unit is quickly fixed and released, and the structure is simple.

The technical scheme of the invention is as follows: the laser displacement sensor is characterized by further comprising a first laser displacement sensor and a control unit, wherein the control unit is fixedly arranged on the shell;

the first laser displacement sensor is fixedly arranged on the shell relative to the insertion direction of the pump unit;

the control unit is respectively and electrically connected with the first laser displacement sensor, the pump unit driving device and the clamping jaw driving device, the first laser displacement sensor is used for monitoring position information of the pump unit and transmitting the position information to the control unit, and the control unit is used for controlling actions of the clamping jaw driving device and the pump unit driving device. Through setting up first laser displacement sensor for whether the installation of monitoring pump unit targets in place, if it targets in place to monitor pump unit assembly, the control unit can control clamping jaw drive arrangement drive clamping jaw according to the position information control clamping jaw drive clamping jaw of pump unit that first laser displacement sensor monitored and live pump unit, if need release pump unit, the control unit can control clamping jaw drive arrangement drive clamping jaw release pump unit, the control unit can be used for controlling pump unit drive arrangement operation or stop simultaneously to can control pump unit drive arrangement's traffic direction and functioning speed.

The technical scheme of the invention is as follows: the pump unit driving device comprises a driving linear module, the driving linear module is a belt linear module or a lead screw linear module, the driving linear module comprises a driving linear guide rail and a driving sliding block, the driving sliding block can be arranged on the driving linear guide rail in a front-back sliding mode, the piston connector is fixedly connected with the driving sliding block, the driving linear module is electrically connected with a control unit, and the control unit is used for controlling the action of the driving linear module. The pump unit driving device selects the belt linear module or the screw rod linear module, and the belt linear module and the screw rod linear module are high in moving speed and high in repeated positioning precision, so that the control of the movement of the piston is more flexible and efficient, the working efficiency and precision of the pump unit are improved, the structure is compact, and the spatial arrangement is facilitated.

The technical scheme of the invention is as follows: the drive straight line module is provided with the grating chi, the grating chi is connected with the control unit electricity, the grating chi is used for monitoring the displacement volume of drive straight line module and sends the control unit to, the control unit can be according to the drive straight line module displacement volume adjustment drive straight line module's that the grating chi monitored action, guarantees the accurate control to piston motion through the functioning speed or the direction of adjusting drive straight line module. Through setting up the grating chi, concrete position and the rate of motion that can accurate monitoring drive the slider have improved the control accuracy of drive straight line module to piston motion.

The technical scheme of the invention is as follows: the piston is vertically arranged on the shell, and the piston is fixedly arranged on the shell;

the second laser displacement sensor is electrically connected with the control unit and used for monitoring the position information of the piston rod and the movement speed of the piston rod and transmitting the position information and the movement speed to the control unit. The second laser displacement sensor is used for monitoring whether the piston is carried when the pump unit is installed and whether the movement speed of the piston in the working process is consistent with that of the driving slide block, so that the phenomenon that circuit equipment is damaged due to water leakage caused by piston neglected installation or medical operation is influenced due to the fact that the piston falls off from the piston connector is avoided, and the water jet scalpel medical pump is safer and more reliable.

The technical scheme of the invention is as follows: the pump unit is characterized by further comprising a control switch, wherein the control switch is electrically connected with the control unit and used for sending information of running or stopping of the pump unit to the control unit. The control switch sends a signal for operating the pump unit or a signal for stopping the pump unit and disassembling the pump unit to the control unit, so as to control the action of the water jet medical pump.

The technical scheme of the invention is as follows: the control switch comprises a wired foot switch or a wireless foot switch or a button switch. According to the actual medical requirements, a wired foot switch or a wireless foot switch or a button switch is selected and used, so that the operation of equipment is facilitated, the use convenience is improved, and the high efficiency and the safety of treatment are guaranteed.

Drawings

FIG. 1 is a schematic view of the pump unit according to the present invention;

fig. 2 is a schematic structural view of a water jet medical pump according to embodiment 1 of the present invention;

FIG. 3 is a schematic view of the pump unit clamping device of the present invention;

FIG. 4 is a schematic view showing the positional relationship of a piston connector and a piston decoupler when the pistons are not connected in accordance with the present invention;

FIG. 5 is a schematic view showing the positional relationship of a piston connector and a piston release when the piston of the present invention is released from the piston connector;

FIG. 6 is a schematic view showing a structure of the coupling projection of the present invention when it is connected to a piston connector;

FIG. 7 is a schematic view showing a structure in which the coupling projection of the present invention is separated from the piston connector;

FIG. 8 is a schematic view of the pump unit retaining means and pump unit drive means of the present invention shown with the pump unit uninstalled;

FIG. 9 is a schematic view of the pump unit retaining means and pump unit drive means of the present invention after the pump unit has been installed;

FIG. 10 is a schematic view showing a connection structure of a coupling projection and a piston connector according to embodiment 2 of the present invention;

fig. 11 is a schematic structural view of a water jet medical pump according to embodiment 3 of the present invention;

in the figure, 100 a housing, 101 a control unit;

1 pump unit, 2 pump unit clamping device, 3 pump unit driving device, 4 piston cylinder, 5 piston, 6 piston rod, 61 connecting protrusion and 611 limit groove;

7, a support frame, 8, a first linear module and 81, a first sliding block;

9 a second linear module, 91 a second slide block;

10 upper clamping jaw, 11 lower clamping jaw, 12 limiting hole, 13 clamping groove, 14 driving linear module, 141 driving linear guide rail and 142 driving sliding block;

15 the piston connector, 151 insert hole, 152 place the trough;

16 pusher, 17 insertion spring, 171 elastic rod;

18 piston separator, 181 separation block, 1811 open ramp;

19 grating ruler, 191 ruler and 192 reading head;

20 a first laser displacement sensor, 21 a second laser displacement sensor, 22 a water inlet cavity, 23 a water outlet cavity, 24 a water inlet one-way valve, 25 a water outlet one-way valve and 26 a control switch;

201 jaw, 202 jaw drive;

221 water inlet and 231 water outlet.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As shown in fig. 1, a water jet medical pump comprises a pump unit 1, wherein the pump unit 1 comprises a water inlet cavity 22, a water outlet cavity 23 and two piston cylinders 4 which are arranged in parallel, each piston cylinder 4 is communicated with the water inlet cavity 22 through a water inlet check valve 24, and the water inlet check valve 24 is used for enabling the water inlet cavity 22 to be communicated with the piston cylinders 4 in a one-way mode; each piston cylinder 4 is communicated with the water outlet cavity 23 through a water outlet check valve 25, the water outlet check valve 25 is used for enabling the piston cylinders 4 to be communicated with the water outlet cavity 23 in a single direction, a piston 5 which reciprocates along the axial direction of the piston cylinder 4 is arranged in the piston cylinder 4, the piston 5 is connected to the piston rod 6, one end, far away from the piston 5, of the piston rod 6 is provided with a connecting protrusion 61 with a conical end part, the diameter of the connecting end face of the connecting protrusion 61 and the diameter of the piston rod 6 are larger than that of the piston rod 6, the water inlet cavity 22 is connected with a water source through a water inlet 221, the water outlet cavity 23 is connected with a water knife through a water outlet 231, the two pistons 5 are controlled to alternately slide in the corresponding piston cylinders 4 in a reciprocating mode, water is pumped to the piston cylinders 4 from one side of the water inlet cavity 22, water is injected to the water knife from one side of the water outlet cavity 23, and uninterrupted normal operation of the water knife is guaranteed.

As shown in fig. 2, the water jet scalpel medical pump further comprises a housing 100, a pump unit holding device 2 and a pump unit driving device 3, wherein the pump unit holding device 2 and the pump unit driving device 3 are fixedly arranged on the housing 100 from front to back.

As shown in fig. 3, the pump unit clamping device 2 includes a support frame 7 fixedly disposed on the housing 100, and an upper clamping jaw 10 and a lower clamping jaw 11 which are mounted on the support frame 7 and can move up and down, the support frame 7 is provided with a limiting hole 12 matched with the piston cylinder 4, the upper clamping jaw 10 and the lower clamping jaw 11 are disposed in front of the limiting hole 12 in parallel, and the upper side and the lower side of the pump unit 1 are respectively provided with a clamping groove 13 matched with the upper clamping jaw 10 and the lower clamping jaw 11.

As shown in fig. 4-7, the pump unit drive means 3 comprises a piston connector 15, a pusher 16, a plug spring 17, the piston connector 15 is provided with an insertion hole 151 that mates with the coupling projection 61, the insertion hole 151 is provided coaxially with the stopper hole 12, the pusher 16 is fixedly attached to the piston connector 15 and located behind the insertion hole 151, the piston connector 15 is provided with a seating groove 152, the seating groove 152 is radially provided along the insertion hole 151, the insertion spring 17 is inserted into and fixed to the seating groove 152, the insertion spring 17 includes two elastic rods 171 having a pitch smaller than a diameter of a connection end surface of the coupling protrusion 61 and the piston rod 6, the two elastic rods 171 are axially symmetrically disposed with respect to the insertion hole 151, one end of the elastic rod 171 is fixedly arranged, 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.

As shown in fig. 4 and 5, a piston separator 18 is fixedly disposed between the piston connector 15 and the support bracket 7, the piston separator 18 is located at the front side of the moving path of the piston connector 15 when the pump unit 1 normally operates, the piston separator 18 includes a separating block 181 disposed corresponding to the free ends of the elastic rods 171, the separating block 181 is used for inserting and separating the two elastic rods 171, specifically, the separating block 181 is symmetrically provided with opening inclined surfaces 1811 at the left and right sides, the opening inclined surfaces 1811 are inclined from the outside to the inside in the front-to-back direction, and when the separating block 181 is inserted between the two elastic rods 171, the free ends of the two elastic rods 171 are opened towards the two sides so as to increase the distance between the two elastic rods 171.

According to the invention, the piston separator 18 is arranged at the front side of the motion path of the piston connector 15 when the pump unit 1 normally works, the piston separator 18 and the piston 5 are oppositely and fixedly arranged, and the piston connector 15 reciprocates back and forth, so that the volume of a cavity formed by the piston 5 and the piston cylinder 4 is increased or reduced, and the corresponding motion track of the piston connector 15 in the process is a 'working interval'; when the pump unit 1 needs to be disassembled, the piston connector 15 moves to the foremost end of the working range and then continues to move forwards, when the piston connector 15 moves above the piston separator 18, the separating block 181 is inserted between the two elastic rods 171 to separate the two elastic rods 171, so that the piston 5 can be released, and the movement track of the piston connector 15 after the piston connector 15 is forwards separated from the working range is the disassembling range.

As shown in fig. 2, 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.

A first laser displacement sensor 20 is arranged opposite to the insertion direction of the pump unit 1, said first laser displacement sensor 20 being fixedly arranged on the housing 100.

The control unit 101 is electrically connected with the first laser displacement sensor 20, the pump unit driving device 3 and the clamping jaw driving device 202 respectively, the first laser displacement sensor 20 is used for monitoring position information of the pump unit 1 and transmitting the position information to the control unit 101, and the control unit 101 is used for controlling actions of the clamping jaw driving device 202 and the pump unit driving device 3.

As shown in fig. 2 and 3, the clamping jaw driving device 202 includes a first straight line module 8 and a second straight line module 9, the first straight line module 8 is disposed on the right side of the supporting frame 7, the second straight line module 9 is disposed on the left side of the supporting frame 7, the first straight line module 8 is used for controlling the upper clamping jaw 10 to move up and down, the second straight line module 9 is used for controlling the lower clamping jaw 11 to move up and down, and the first straight line module 8 and the second straight line 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 operate according to the position information of the pump unit 1 monitored by the first laser displacement sensor 20.

The first linear module 8 is a screw rod linear module, the first linear module 8 comprises a first sliding block 81, and the upper clamping jaw 10 is fixedly connected with the first sliding block 81.

The second linear module 9 is a screw rod linear module, the second linear module 9 comprises a second sliding block 91, and the lower clamping jaw 11 is fixedly connected with the second sliding block 91.

As shown in fig. 8 or 9, the water jet medical pump further includes a driving linear module 14, the driving linear module 14 is a screw rod linear module, the driving linear module 14 includes a driving linear guide rail 141 and a driving slider 142, the driving slider 142 is slidably disposed on the driving linear guide rail 141 in a front-back direction, 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 configured to control the operation of the driving linear module 14.

As shown in fig. 9, the driving linear module 14 is provided with a grating ruler 19, the grating ruler 19 is used for monitoring the displacement of the driving linear module 14, specifically, as shown in fig. 8, the grating ruler 19 includes a ruler 191 and a reading head 192, the ruler 191 is fixedly disposed on the housing 100, the ruler 191 is parallel to the driving linear guide rail 141, the reading head 192 is fixedly disposed on the driving slider 142, the reading head 192 is electrically connected to the control unit 101, and the control unit 101 can monitor the displacement of the driving linear module 14 according to the grating ruler 19 to control the operation state of the pump unit 1.

As shown in fig. 8 or 9, the water-jet medical pump further includes a second laser displacement sensor 21, a second laser displacement sensor 21 is vertically disposed for each motion path of the piston rod 6, and the second laser displacement sensor 21 is fixedly disposed on the housing 100.

The second laser displacement sensor 21 is electrically connected with the control unit 101, and the second laser displacement sensor 21 is used for monitoring the position information of the piston rod 6 and the movement speed of the piston rod 6 and transmitting the position information and the movement speed to the control unit 101.

As shown in fig. 2, the water jet medical pump further includes a control switch 26, the control switch 26 is electrically connected to the control unit 101, and the control switch 26 is used for sending information of operation or stop of the pump unit 1 to the control unit 101.

The control switch 26 is provided with a wired foot switch and a wireless foot switch.

The working principle is as follows:

as shown in fig. 1, the pump unit 1 controls the operation speed of the driving linear module 14 to change the water flow speed and the water flow pressure by arranging a water inlet check valve 24 and a water outlet check valve 25 in the piston cylinder 4, so that water enters the piston cylinder 4 from the water inlet cavity 22 when the piston 5 is pulled backwards, and water enters the water outlet cavity 23 from the piston cylinder 4 when the piston 5 is pushed forwards.

(1) When the pump unit 1 is installed, the piston connector 15 is located at an initial position of a working interval, wherein the initial position of the working interval is the position of the piston connector 15 when the piston 5 is in contact with the bottom of the piston cylinder 4 after the piston 5 is connected with the piston connector 15, namely when the volume of a cavity formed by the piston 5 and the piston cylinder 4 is minimum; the upper clamping jaw 10 is located at the upper end of the stroke of the first linear module 8, 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 of guiding and supporting the pump unit 1, the coupling protrusion 61 is firstly contacted with the piston connector 15, the coupling protrusion 61 is opened towards two sides by pressing the elastic rod 171, when the coupling protrusion 61 overruns the elastic rod 171, as shown in fig. 6, 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 coupling protrusion 61, and the pusher 16 behind the insertion hole 151 is used for limiting the backward movement of the coupling protrusion 61, so that the connection between the piston 5 and the piston connector 15 is realized.

Meanwhile, the first laser displacement sensor 20 monitors that the pump unit 1 is installed in place, the control unit 101 controls the first linear module 8 and the second linear module 9 to respectively drive the upper clamping jaw 10 and the lower clamping jaw 11 to move, and the upper clamping jaw and the lower clamping jaw are accurately clamped into the clamping groove 13, so that the pump unit 1 is fixed, an instruction for starting operation of the pump unit 1 is given through the control switch 26, namely the drive linear module 14 is controlled to drive the piston 5 to reciprocate back and forth in the piston cylinder 4, so that the functions of pumping water and draining water are realized, and different water flow pressures are realized by adjusting the operation speed of the piston 5.

(2) When the pump unit 1 is disassembled, the control switch 26 gives an instruction that the pump unit 1 stops working, the control unit 101 controls the first linear module 8 to drive the upper clamping jaw 10 to move upwards to an initial state, the second linear module 9 drives the lower clamping jaw 11 to move downwards to the initial state, the pump unit clamping device 2 releases the body of the pump unit 1, the driving linear module 14 pushes the piston connector 15 forwards to the outside of a working range, the piston connector 15 runs to the upper part of the piston separator 18, when the distance between the two elastic rods 171 is larger than the diameter of the connecting end face of the connecting protrusion 61 and the piston rod 6 under the action of the opening inclined surface 1811, as shown in fig. 5 and 7, the body of the pump unit 1 can be pulled out of the limiting hole 12 and the piston rod 6 can be pulled out of the insertion hole 151, when the second laser displacement sensor 21 detects that the piston rod 6 is pulled out, the drive linear module 14 controls the piston connector 15 to return to the "working range" initial position again, in order to assemble the pump unit 1 the next time.

Example 2

As shown in fig. 10, the difference from embodiment 1 is that two elastic rods 171 are fixed on the piston connector 15, one end of each elastic rod 171 is fixed, the other end is a free end, the free ends of the two elastic rods 171 are located on the same side, the coupling protrusion 61 is provided with a limiting groove 611 matching with the elastic rod 171 along the radial direction thereof, the width of the limiting groove 611 is equal to the outer diameter of the elastic rod 171, the outer diameter of the coupling protrusion 61 is larger than the distance between the two elastic rods 171, the rear end surface of the coupling protrusion 61 is provided with a tapered chamfer, when the rear end surface of the coupling protrusion 61 contacts the elastic rod 171, the two elastic rods 171 can be opened, when the coupling protrusion 61 is pushed to the position where the elastic rod 171 corresponds to the limiting groove 611, the two elastic rods 171 are clamped into the limiting groove 611 under the action of their own elastic force, so as to connect the piston connector 15 and the piston 5, the piston 5 and the piston connector 15 are ensured to synchronously move back and forth, and the structure is simpler and more reliable.

Example 3

As shown in fig. 11, the difference from embodiment 1 is that the pump unit 1 is provided with three parallel piston cylinders 4, and three driving linear modules 14 are correspondingly provided for driving the three pistons 5 to move alternately in the respective piston cylinders 4, and compared with embodiment 1 in which two pistons 5 move alternately back and forth to deliver high-pressure fluid, on the premise that the diameters and lengths of the piston cylinders 4 are the same and the operating speeds of the pistons 5 are the same, the efficiency of the fluid output by the pump unit 1 is higher in the same time, and when one of the driving linear modules 14 fails to 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 scalpel medical pump comprises a shell (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 shell (100) from front to back in sequence; pump unit (1) includes piston cylinder (4), be provided with piston (5) in piston cylinder (4), its characterized in that:

also comprises a piston connector (15) and a piston separator (18);

the pump unit driving device (3) is used for driving a piston connector (15) to move back and forth relative to the shell (100), two elastic rods (171) arranged at intervals are arranged on the piston connector (15), a connecting protrusion (61) is arranged at the rear end of the piston (5), and the connecting protrusion (61) can be inserted and clamped between the two elastic rods (171);

the piston separator (18) is fixedly arranged on the shell (100), and the piston separator (18) can be inserted into and used for expanding the two elastic rods (171) so as to enable the piston connector (15) to release 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 for driving the clamping jaw (201) to open and close so as to clamp or release the pump unit (1).

2. The water-jet medical pump as claimed in claim 1, wherein: the piston separator (18) is located on the front side of a moving path of the piston connector (15) when the pump unit (1) works normally, the piston separator (18) comprises a separating block (181) which is arranged corresponding to the elastic rods (171), and the separating block (181) is used for inserting and expanding the two elastic rods (171).

3. The water-jet medical pump as claimed in claim 1, wherein: the pump unit (1) comprises a water inlet cavity (22) and a water outlet cavity (23) which are separated from each other, the piston cylinder (4) is communicated with the water inlet cavity (22) through a water inlet check valve (24), and the water inlet check valve (24) is used for enabling the water inlet cavity (22) to be communicated with the piston cylinder (4) in a one-way mode; the piston cylinder (4) is communicated with the water outlet cavity (23) through a water outlet check valve (25), and the water outlet check valve (25) is used for enabling the piston cylinder (4) to be communicated with the water outlet cavity (23) in a one-way mode.

4. The water-jet medical pump as claimed in claim 1, wherein: clamping jaw (201) are including last clamping jaw (10) and lower clamping jaw (11) that set up relatively, pump unit (1) is provided with draw-in groove (13) that matches with last clamping jaw (10) and lower clamping jaw (11), clamping jaw drive arrangement (202) are used for driving in clamping jaw (10) and lower clamping jaw (11) relative motion card go into draw-in groove (13) to and be used for driving in clamping jaw (10) and lower clamping jaw (11) move to the back and deviate from in draw-in groove (13).

5. The water-jet medical pump as claimed in claim 1 or 2, wherein: the device also comprises a first laser displacement sensor (20) and a control unit (101), wherein the control unit (101) is fixedly arranged on the shell (100);

the first laser displacement sensor (20) is fixedly arranged on the shell (100) relative to the insertion direction of the pump unit (1);

the control unit (101) is respectively electrically connected with the first laser displacement sensor (20), the pump unit driving device (3) and the clamping jaw driving device (202), the first laser displacement sensor (20) is used for monitoring position information of the pump unit (1) and transmitting the position information to the control unit (101), and the control unit (101) is used for controlling actions of the clamping jaw driving device (202) and the pump unit driving device (3).

6. The water-jet medical pump as claimed in claim 5, wherein: the pump unit driving device (3) comprises a driving linear module (14), the driving linear module (14) is a belt linear module or a screw rod linear module, the driving linear module (14) comprises a driving linear guide rail (141) and a driving sliding block (142), the driving sliding block (142) can be arranged on the driving linear guide rail (141) in a front-back sliding mode, the piston connector (15) is fixedly connected with the driving sliding block (142), the driving linear module (14) is electrically connected with a control unit (101), and the control unit (101) is used for controlling the action of the driving linear module (14).

7. The water-jet medical pump as claimed in claim 6, wherein: the driving linear module (14) is provided with a grating ruler (19), the grating ruler (19) is electrically connected with the control unit (101), and the grating ruler (19) is used for monitoring the displacement of the driving linear module (14) and transmitting the displacement to the control unit (101).

8. The water-jet medical pump as claimed in claim 4, wherein: the device is characterized by further comprising a second laser displacement sensor (21), wherein a piston rod (6) is arranged between the piston (5) and the connecting protrusion (61), a second laser displacement sensor (21) is vertically arranged for each motion path of the piston rod (6), and the second laser displacement sensor (21) is fixedly arranged on the shell (100);

the second laser displacement sensor (21) is electrically connected with the control unit (101), and the second laser displacement sensor (21) is used for monitoring the position information of the piston rod (6) and the movement speed of the piston rod (6) and transmitting the position information and the movement speed to the control unit (101).

9. The water-jet medical pump as claimed in claim 5, wherein: the pump unit further comprises a control switch (26), the control switch (26) is electrically connected with the control unit (101), and the control switch (26) is used for sending information of running or stopping of the pump unit (1) to the control unit (101).

10. The water-jet medical pump as claimed in claim 9, wherein: the control switch (26) comprises a wired foot switch or a wireless foot switch or a button switch.