An ultra-high pressure generating device for medical water jet

Abstract

A super-high pressure generating device for a medical water jet comprises a high-pressure pump body (1), wherein: a high-pressure cylinder seat (2) is installed in the inner hole of the high-pressure pump body (1), and one end of the high-pressure cylinder (5) abuts against the end of the high-pressure cylinder seat (2); a low-pressure water inlet pipe (6) and a high-pressure water outlet pipe (7) respectively press a corresponding water inlet check valve (8) and a water outlet check valve (9) into two upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder (5), and are fixed in the high-pressure pump body (1) by a sleeve (12) having a triangular shape, and the other end of the high-pressure cylinder (5) is fixed in the high-pressure pump body (1); a piston (10) is placed in the working cavity of the high-pressure cylinder (5); a connecting groove is provided at the end of the connecting rod (11), and the connecting groove matches with an elastic claw at one end of the piston to realize quick locking connection and release with the piston (10). The present invention has a simple structure and is convenient and quick to replace.

Description

Technical Field

[0001] The invention relates to an ultra-high pressure water jet application technology, in particular to a medical ultra-high pressure water jet energy beam cleaning technology, specifically to an ultra-high pressure generating device for medical water jet. Background Art

[0002] As we all know, after decades of development, ultra-high pressure water jet technology has been widely used in the cutting and cleaning of steel plates, glass, stone and other materials. At the same time, with the continuous expansion of control technology and functions, it has also been applied to emerging fields such as nano-homogenization technology, rubber crushing, and shell destruction. In recent years, the application research of ultra-high pressure water jet in the medical field has also been developing. Due to the clean water quality requirements and the characteristics of disposable use in the medical field, some parts in the ultra-high pressure generating device that are in contact with water are required to be disposable and must meet the requirements of easy replacement and low cost. As far as the applicant knows, there is currently no relevant high pressure generating device that can meet the medical characteristics available for use, and innovative design is required. Summary of the invention

[0003] The purpose of the present invention is to solve the problem of convenient replacement of medical ultrahigh pressure water devices and to design an ultrahigh pressure generating device for medical water jets that can meet the requirements of muscle tissue surface removal and cutting in the medical industry.

[0004] The technical solution of the present invention is:

[0005] A super-high pressure generating device for medical water jet, comprising a high-pressure pump body 1, which is connected and fixed to a transmission mechanism, and is characterized in that: a high-pressure cylinder seat 2 is installed in the inner hole of the high-pressure pump body 1, and one end of a high-pressure cylinder 5 abuts against the end of the high-pressure cylinder seat 2; a low-pressure water inlet pipe 6 and a high-pressure water outlet pipe 7 respectively press a corresponding water inlet check valve 8 and a water outlet check valve 9 into two upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder 5, and are fixed in the high-pressure pump body 1 by a sleeve 12 having a triangular shape, while fixing the other end of the high-pressure cylinder 5 in the high-pressure pump body 1; a piston 10 is placed in the working cavity of the high-pressure cylinder 5; the end of a connecting rod 11 A connecting groove is provided, which matches with the elastic claw at one end of the piston to realize quick locking connection and release with the piston 10. When the elastic claw is located in the working chamber of the high-pressure cylinder 5, the hook-shaped structure at the end of the elastic claw is inserted into the connecting groove at the end of the connecting rod 11 to realize the connection between the connecting rod and the piston. The piston moves back and forth in the working chamber driven by the connecting rod. When the end of the piston connected to the connecting rod enters the conical cavity at the end of the high-pressure cylinder 5, the elastic claw disperses into the conical cavity under the action of elastic force, and the hook-shaped structure at its end is separated from the groove at the end of the connecting rod 11 to realize the quick separation of the connecting rod and the piston; the connecting rod 11 is connected to the plunger rod of the transmission mechanism.

[0006] The high-pressure cylinder seat 2 is fixed in the inner hole of the high-pressure pump body 1 by tightening the nut 3 and the spring 4.

[0007] The low-pressure water inlet pipe 6, high-pressure water outlet pipe 7, water inlet check valve 8, water outlet check valve 9, high-pressure cylinder 5 and the piston 10 placed in the high-pressure cylinder 5 together constitute a disposable quick-assembly component; the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 are integrated and installed in a sleeve 12; one end of the sleeve 12 is connected to a locker 13, and the other end has a boss with a Lelo triangle feature, and the end of the high-pressure pump body 1 has a section of the same hole structure, and the hole structure is followed by a circular inner hole with a larger aperture; the triangular boss at one end of the sleeve 12 rotates 60° after passing through the high-pressure pump body with the same hole structure at the end. Since the triangular boss has a certain inclined surface, the inclined surface forces the sleeve 12 to push the high-pressure cylinder top tightly in the high-pressure cylinder seat 2 to prevent axial movement during operation.

[0008] The triangular boss: under the condition of a constant cavity diameter d0, after rotational locking, the contact area between the boss and the baffle of the high-pressure pump body is relatively maximized to ensure safe use of the locking structure.

[0009] The cavity of the high-pressure cylinder 5 is divided into three sections. The first is a cylindrical cavity, where the piston is driven by the connecting rod to perform reciprocating linear motion; the second is a tapered hole cavity, where the piston is locked and loosened with the connecting rod; when assembling the finished product of the quick-connect unit component, the piston is placed in the tapered hole cavity in the high-pressure cylinder, at which time the piston is in a free state, and the elastic claws in the middle are radially expanded outward; when in use, the operator inserts the quick-connect unit into the high-pressure cylinder seat and rotates the sleeve to lock it. When the piston is pushed by the connecting rod, it leaves the tapered hole cavity and enters the cylindrical cavity. The elastic claws of the piston are restrained by the cavity and gather inward. The hook structure at the end is coupled with the groove at the end of the connecting rod, and performs reciprocating linear motion driven by the connecting rod. The upper and lower dead points of the piston movement are both in the cylindrical cavity of the high-pressure cylinder, realizing self-locking of the piston; when an operation is completed and the quick-connect unit components need to be replaced, the sleeve is rotated in the opposite direction and the quick-assembly components are pulled out as a whole. At this time, the piston retreats and disengages from the cylindrical cavity of the high-pressure cylinder under the drive of the connecting rod, and moves to the tapered hole cavity. The elastic claw returns to its original natural state, and the hook structure disengages from the groove at the end of the connecting rod. The hole uses a retaining ring to limit the displacement of the piston to ensure that the piston is separated from the connecting rod, thereby realizing self-loosening of the piston.

[0010] The elastic claws are composed of two, three, four or more hook-shaped structures which are radially expanded outwards in a natural state.

[0011] The low-pressure water inlet pipe and the high-pressure water outlet pipe respectively press the water inlet check valve and the water outlet check valve into the upper and lower holes arranged at an angle on the same side of one end of the high-pressure cylinder; wherein the diameter d1 of the cylindrical cavity of the high-pressure cylinder and the maximum distance d2 at the ends of the low-pressure water inlet pipe and the high-pressure water outlet pipe determine the maximum external dimensions of the quick connection unit component, d1 determines the external dimensions of the piston, d2 increases with the increase of the angle α1 between the axes of the low-pressure water inlet pipe and the high-pressure water outlet pipe, and according to the lightweight design requirements, this dimension needs to ensure a smaller design value range; and the angle α1 between the axes of the low-pressure water inlet pipe and the high-pressure water outlet pipe under the condition that the cylindrical cavity diameter d1 is constant, the larger its value is, the larger the minimum spacing d3 between the bottoms of the low-pressure water inlet and high-pressure water outlet holes in the high-pressure cylinder is, that is, the more the safety of the pressure-bearing structure at this location can be guaranteed.

[0012] Beneficial effects of the present invention:

[0013] The present invention uses medical water such as physiological saline as the medium liquid, pressurizes it through an ultra-high pressure generating device to form a stable high-pressure and high-speed jet, and sprays it through a nozzle to clean the surface of injured muscles or cut tissues during medical surgery, while at the same time protecting healthy muscle tissue to the maximum extent and effectively. Due to the sterility requirements of the use occasion, all parts and equipment in contact with the medium liquid are disposable, and all parts meet the requirements of rapid assembly.

[0014] The present invention is used through a motor and a transmission mechanism, including a water inlet and outlet unit, a quick connection unit, and a high-pressure generating unit. The motor drives the transmission mechanism to drive the piston to perform reciprocating linear motion in the high-pressure cavity, and pressurizes the liquid flowing into the one-way water inlet channel and squeezes it out in one direction, forming a high-pressure and high-speed jet with a flow rate of 0.1~1Lpm and a pressure of 10~200MPa, and the applicable power is 0.5~4kW.

[0015] The invention has the advantages of simple structure, convenient replacement and safe and reliable connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the ultra-high voltage generating device of the present invention.

[0017] Figure 2 It is a schematic diagram of locking the quick connection unit of the present invention. Figure 2 a Schematic diagram of the initial position of the sleeve; Figure 2 b Schematic diagram of the sleeve inserted into the high-pressure pump body; Figure 2 c Schematic diagram of the locking state when the sleeve is rotated 60° relative to the high-pressure pump body; Figure 2 d Schematic diagram of the baffle formed by the intersection of the triangular boss of the sleeve and the triangular hole structure at the end of the high-pressure pump body.

[0018] Figure 3It is a schematic diagram of the self-locking and self-loosening working conditions of the piston of the present invention. Figure 3 a is a schematic diagram showing that the piston is not assembled into the high-pressure chamber; Figure 3 b represents the assembly diagram of the quick-change mechanism components; Figure 3 c represents the schematic diagram of the piston (0) position; Figure 3 d is a schematic diagram showing the position of the piston (1); Figure 3 e represents the schematic diagram of the plug (2); Figure 3 f is a schematic diagram showing the piston returning to position (1); Figure 3 g is a schematic diagram showing the piston returning to position (0).

[0019] Figure 4 It is a schematic diagram of the angle arrangement of the inlet and outlet water channels of the present invention (equivalent to a one-way valve structure).

[0020] Figure 5 It is a schematic diagram of the working state of the water inlet valve of the present invention.

[0021] Figure 6 It is a schematic diagram of the working state of the water outlet valve of the present invention. DETAILED DESCRIPTION

[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-6 shown.

[0024] An ultra-high pressure generator for medical water jets uses saline or other medical water as the working fluid, pressurizes it through the ultra-high pressure generator and sprays it through the nozzle to form a high-speed jet. In clinical surgery, this high-speed jet is used to remove or cut problematic tissue on the muscle surface. Due to the sterility requirements of the use occasion, all parts and equipment that come into contact with the working fluid are disposable, so there are requirements for quick assembly of parts. Figure 1 As shown, this ultra-high pressure generating device, driven by a motor and a belt drive, drives the crankshaft connecting rod mechanism to push the piston to perform reciprocating linear motion, thereby achieving pressurization and forming a high-speed liquid jet at the nozzle. The liquid pressure can be adjusted by changing the motor speed and the nozzle diameter. The flow rate is 0.1~1Lpm and the pressure is 10~200MPa.

[0025] A super-high pressure generating device for medical water jet comprises a high-pressure pump body 1, which is connected and fixed to a transmission mechanism. Figure 1As shown, a high-pressure cylinder seat 2 is installed in the inner hole of the high-pressure pump body 1, and one end of the high-pressure cylinder 5 is against the end of the high-pressure cylinder seat 2; the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 respectively press the corresponding water inlet check valve 8 and the water outlet check valve 9 into the upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder 5, and are fixed in the high-pressure pump body 1 by a sleeve 12 with a triangular shape, while the other end of the high-pressure cylinder 5 is fixed in the high-pressure pump body 1; the piston 10 is placed in the working cavity of the high-pressure cylinder 5; the end of the connecting rod 11 is provided with a connecting groove, which is connected with the elastic card at one end of the piston The claws match to achieve quick locking connection and release with the piston 10. When the elastic claw is located in the working chamber of the high-pressure cylinder 5, the hook-shaped structure at the end of the elastic claw is inserted into the connecting groove at the end of the connecting rod 11 to achieve the connection between the connecting rod and the piston. The piston moves back and forth in the working chamber driven by the connecting rod. When the end of the piston connected to the connecting rod enters the conical cavity at the end of the high-pressure cylinder 5, the elastic claw disperses into the conical cavity under the action of elastic force, and the hook-shaped structure at its end is separated from the groove at the end of the connecting rod 11 to achieve quick separation of the connecting rod and the piston; the connecting rod 11 is connected to the plunger rod of the transmission mechanism. The low-pressure water inlet pipe 6, the high-pressure water outlet pipe 7, the water inlet check valve 8, the water outlet check valve 9, the high-pressure cylinder 5 and the piston 10 placed in the high-pressure cylinder 5 together constitute a disposable quick-assembly component; the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 are integrated and installed in a sleeve 12, such as Figure 2 As shown, one end of the sleeve 12 is connected to a locker 13, and the other end has a boss with a Lelo triangle feature. The end of the high-pressure pump body 1 has a section of the same hole structure, and the hole structure is followed by a circular inner hole with a larger aperture; the triangular boss at one end of the sleeve 12 rotates 60° after passing through the high-pressure pump body with the same hole structure at the end. Since the triangular boss has a certain inclined surface, the inclined surface forces the sleeve 12 to push the high-pressure cylinder top tightly in the high-pressure cylinder seat 2 to prevent axial movement during operation.

[0026] like Figure 1 As shown, the high-pressure pump body 1 is connected and fixed to the transmission mechanism by bolts, and the high-pressure cylinder seat 2 is fixed in the hole of the high-pressure pump body 1 by the tightening nut 3 and the pre-compression spring 4; the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 respectively press the water inlet check valve 8 and the water outlet check valve 9 into the upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder 5, and are fixed by the sleeve 12 with a triangular shape; the inner hole of the locker 13 and the cylindrical outer edge of the sleeve 12 have coupled milling ends for connection and radial relative fixation; the low-pressure water inlet pipe 6, the high-pressure water outlet pipe 7, the sleeve 12 and the high-pressure cylinder 5 are placed together in the high-pressure cylinder seat 2; the piston 10 is placed in the cavity of the high-pressure cylinder 5, and the end of the connecting rod 11 is connected and locked with the piston 10 after the quick assembly parts are installed in place, and the other end is connected to the plunger rod of the transmission mechanism.

[0027] The low-pressure water inlet pipe 6, the high-pressure water outlet pipe 7, the water inlet check valve 8, the water outlet check valve 9, the sleeve 12, the locker 13 and the high-pressure cylinder 5, and the piston 10 disposed in the high-pressure cylinder 5 together constitute the quick-change mechanism components.

[0028] When the piston 10 moves to the right driven by the connecting rod 11, a negative pressure state is formed in the inner cavity of the high-pressure cylinder 5. Under this negative pressure state, the valve core of the water inlet check valve 8 moves to the right and opens, and the valve core of the water outlet check valve 9 moves to the right and closes. In this process, the inner cavity of the high-pressure cylinder 5 is filled with liquid to complete the water intake; when the piston 10 completes the rightward movement stroke and moves in the opposite direction to the left driven by the connecting rod 11, the liquid in the inner cavity of the high-pressure cylinder 5 is compressed to increase its pressure to form a high-pressure state. The high-pressure liquid causes the valve core of the water inlet check valve 8 to move to the left and close, and the valve core of the water outlet check valve 9 to move to the left and open, so that the high-pressure liquid flows to the nozzle to form a high-speed liquid jet for work.

[0029] Details are as follows:

[0030] The main components of the present invention are:

[0031] 1. Quick change mechanism.

[0032] The quick connection unit, i.e. the water jet operating unit, is composed of the low-pressure water inlet pipe 6, the high-pressure water outlet pipe 7, the water inlet check valve 8, the water outlet check valve 9, the sleeve 12, the locker 13, the high-pressure cylinder 5, and the piston 10 placed in the high-pressure cylinder 5. Its purpose is to meet the requirements of completely clean use in the medical and health industry, ensure that all parts and equipment in contact with the working liquid are disposable, and at the same time require the requirements of quick replacement.

[0033] like Figure 2 As shown, the outer surface of the sleeve 12 has a boss similar to the Leroy triangle feature (with an inclined surface for locking), and the end of the high-pressure pump body 1 has a section of the same hole structure, followed by a polygonal inner hole with a larger aperture; Figure 2 As shown in a, the initial position of the sleeve 12 is outside the high-pressure pump body 1, that is, the state before the quick-change structure is installed; Figure 2 As shown in FIG. 2 , the operator inserts the sleeve 12 into the high-pressure pump body 1 and inserts it to the bottom. At this time, the triangular boss of the sleeve 12 passes through the high-pressure pump body 1 having the same hole structure at the end; Figure 2 As shown in Figure c, the operator rotates the sleeve 12 60° relative to the high-pressure pump body 1 to achieve locking; Figure 2 As shown in FIG. 4 , the triangular boss of the sleeve 12 and the triangular hole structure at the end of the high-pressure pump body intersect to form a baffle to achieve rapid locking of the mechanism.

[0034] The advantages of the boss with triangular features as a baffle are: under the condition of a constant cavity diameter d0, after rotational locking, the triangular boss presses tightly against the inner concave portion of the hole, and the contact area between the sleeve and the baffle of the high-pressure pump body is relatively large, thereby ensuring the safe use of the locking structure.

[0035] 2. Self-locking and self-loosening of the piston;

[0036] Also due to the use requirements of the medical and health industry, the piston is a disposable part and the connecting rod is a non-replaceable part. Its locking and loosening must meet the requirements of reliability and durability, while also requiring quick replacement. Figure 3 As shown, the cavity of the high-pressure cylinder 5 is divided into two sections AB. A is a cylindrical cavity, and the piston 10 is driven by the connecting rod 11 to perform reciprocating linear motion at this position; B is a conical cavity, and the piston 10 is locked and released with the connecting rod 11 at this position.

[0037] like Figure 3 As shown in a, the piston 10 is separated from the high-pressure cylinder 5; Figure 3 As shown in FIG. 2 , when assembling the components of the quick-change mechanism, the piston 10 is inserted into the high-pressure cylinder 5 and placed in its conical cavity. At this time, the plastic tail of the piston 10 is in a free outward-turned state, and the claw with a hook-shaped structure in the middle thereof is naturally expanded radially outward; Figure 3 As shown in Figure c, before the device is used, the connecting rod 11 is at position (0), and the operator inserts the quick-change mechanism into the high-pressure cylinder seat 2 to the locking position, and the high-pressure cylinder 5 drives the piston 10 to move toward the connecting rod 11; Figure 3 As shown in FIG. d, after the quick-change mechanism is inserted into the high-pressure cylinder seat 2 to the locking position and rotated to lock, the piston 10 is pushed by the connecting rod 11 to leave the conical cavity and enter the cylindrical cavity. The plastic tail of the piston 10 is restrained by the cavity and gathered inward. The hook-shaped structure of the tail is coupled with the groove at the end of the connecting rod 11 to achieve self-locking of the piston 10. Figure 3 As shown in FIG. 5 , when the device is used, the connecting rod 11 is pushed to the (+) position, and the piston 10 performs reciprocating linear motion under the push of the connecting rod 11. The left and right dead points of the piston 10, i.e., the (0) and (+) positions of the connecting rod 11, are both located in the cylindrical cavity of the high-pressure cylinder 5. When the device is used, the piston 10 repeats as shown in FIG. Figure 3 d. Figure 3 e's position status; Figure 3 As shown in FIG. 5 , after completing one operation, the device stops, and the connecting rod 11 stops at position (0). When the quick-change mechanism needs to be replaced, the mechanism components are pulled outward (to the left) as a whole. At this time, the piston 10 retreats under the drive of the connecting rod 11 and leaves the cylindrical cavity of the high-pressure cylinder 5; Figure 3As shown in FIG. 6 , the piston 10 moves to the conical cavity driven by the connecting rod 11, and the claws of the plastic tail wing return to their original naturally outwardly expanded state, the hook-shaped structure is naturally separated from the groove at the end of the connecting rod, and the outwardly expanded claws are blocked by the conical hole and remain in the high-pressure cylinder 5, while the end of the connecting rod 11 is separated from the inner cavity of the high-pressure cylinder 5, realizing the self-loosening of the piston 10. The plastic tail wing has two, three, four or more naturally outwardly expanded claw-shaped structures.

[0038] 3. Angle water inlet and outlet channels;

[0039] Since the application scenarios of such components are not fixed, the equipment has lightweight design requirements. Considering the safe use of pressure-bearing parts, water inlet and outlet channels arranged at an angle are specially designed.

[0040] like Figure 4 As shown, one end of the low-pressure water inlet pipe 6 is threadedly connected to the water inlet passage at the tail of the high-pressure cylinder 5, and the one-way valve core 14 is placed in the step hole of the water inlet passage; one end of the high-pressure water outlet pipe 7 is threadedly connected to the water outlet passage at the tail of the high-pressure cylinder 5, and the water outlet valve pad 15 is pressed against the bottom of the hole of the water outlet passage, and the one-way valve core 14 is placed in the step hole of the high-pressure water outlet pipe 7; the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 are connected to the upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder 5, and are fixed by a sleeve 12; the low-pressure hose 16 is quickly connected to the tail end of the low-pressure water inlet pipe 6, and the high-pressure hose 17 is riveted to the tail end of the high-pressure water outlet pipe 7, and its extension in the radial direction is limited by two parallel holes at the end of the locker 13 to be constrained to be parallel to the axial direction.

[0041] like Figure 4 As shown, the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 are respectively connected to the upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder 5. Since the inner hole diameter d1 of the high-pressure cylinder 5 is relatively small (<10mm), and the maximum distance d2 between the ends of the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 is greater than 20mm, in order to meet the above conditions, the axis angle α1 of the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 is less than 15°, so that the safety of the pressure-bearing structure at this location can be guaranteed, and sufficient installation and operation space is left for the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 to be threadedly connected to the high-pressure cylinder 5. The water inlet and outlet channels of the components arranged at an angle control their external dimensions to the greatest extent under the condition of meeting the safety use, meeting the requirements of lightweight design.

[0042] The diameter d1 of the cylindrical cavity of the high-pressure cylinder 5 and the maximum distance d2 at the ends of the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 determine the maximum external dimensions of the quick-connect unit components. d1 determines the external dimensions of the piston 10 in the high-pressure cylinder 5. d2 increases with the increase of the angle α1 between the axes of the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7. According to the lightweight design requirements, this dimension needs to maintain a smaller design value range. Under the condition that the cylindrical cavity diameter d1 is constant, the larger the angle α1 between the axes of the low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7, the larger the minimum distance d3 between the bottoms of the low-pressure water inlet and high-pressure water outlet holes in the high-pressure cylinder 5, that is, the more the safety of the pressure-bearing structure at that location can be guaranteed.

[0043] The low-pressure water inlet pipe 6 and the high-pressure water outlet pipe 7 are both threadedly connected to the upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder 5. The threaded connection can maximize the connection strength of the connection at this location under the condition of a fixed hole diameter, thereby ensuring safety and reliability within the operating pressure range of 10~200MPa.

[0044] The one-way valve is always in an alternating cycle of one-way water inflow and one-way water outflow when working. In the water inflow state, the piston 10 is pulled outward (to the right) driven by the connecting rod 11, and negative pressure is generated in the cavity of the high-pressure cylinder 5. The working fluid is sucked into the cavity of the high-pressure cylinder 5 through the low-pressure water inlet pipe 6. Figure 5 As shown, although the one-way valve core 14 in the water inlet channel fits with the bottom of the hole of the passage under the action of water inlet pressure and negative pressure, the working liquid can be sucked in through the water passage left on the outer cylindrical surface and the single-side bottom surface of the one-way valve core 14; at the same time, the one-way valve core 14 in the water outlet channel fits with the water outlet valve pad 15 under the action of high-pressure back pressure, and the bottom surface of the one-way valve core 14 and the annular surface of the water outlet valve pad 15 form a seal to prevent the working liquid from flowing out.

[0045] In the water discharge state, the piston 10 is squeezed inward (to the left) by the connecting rod 11, and the working fluid is discharged to the high-pressure water outlet pipe 7 through the cavity of the high-pressure cylinder 5. Figure 6 Although the one-way valve core 14 in the water outlet channel shown is fitted with the bottom of the hole of the high-pressure water outlet pipe 7 under the action of the water outlet pressure, the working fluid can be discharged through the water passage left on the outer cylindrical surface and the single-side bottom surface of the one-way valve core 14; at the same time, the one-way valve core 14 in the water inlet channel is fitted with the low-pressure water inlet pipe 6 under the action of the water outlet pressure, and the bottom surface of the one-way valve core 14 and the annular surface of the low-pressure water inlet pipe 6 are closed to prevent the working fluid from flowing back.

[0046] The key points of the present invention are:

[0047] 1. The sleeve with a triangular boss outer surface rotates after passing through the triangular hole at the end of the high-pressure pump body, and its cross structure acts as a rib to achieve axial locking; the outer surface of the boss can be square, polygonal, toothed, etc. in addition to the triangle;

[0048] 2. The piston has a sealing section, a coupling section, and a guide section structure, which enables the piston to reciprocate linearly under the drive of the connecting rod, and can realize self-locking and self-loosening of the piston and the connecting rod;

[0049] 3. The inner hole of the high-pressure cylinder has a cylindrical high-pressure cavity, a tapered hole cavity, and a cylindrical guide cavity structure. Its structure enables the piston to reciprocate linearly under the drive of the connecting rod, and can realize the self-locking and self-loosening of the piston and the connecting rod;

[0050] 4. The elastic claw of the piston coupling section having a hook-shaped structure may be composed of two, three, four or more hook-shaped structures that are radially expanded outward in a natural state;

[0051] 5. The angled water inlet and outlet channels with a lightweight design ensure the safety of high-pressure parts while having the smallest overall dimensions.

[0052] The parts not involved in the present invention are the same as the prior art or can be implemented by using the prior art.

Claims

1. An ultra-high pressure generating device for a medical water jet, comprising a high-pressure pump body (1), the high-pressure pump body (1) being connected and fixed to a transmission mechanism, and characterized in that: A high-pressure cylinder seat (2) is installed in the inner hole of the high-pressure pump body (1), and one end of the high-pressure cylinder (5) is butted against the end of the high-pressure cylinder seat (2); the low-pressure water inlet pipe (6) and the high-pressure water outlet pipe (7) respectively press the corresponding water inlet check valve (8) and the water outlet check valve (9) into the upper and lower holes arranged at an angle on the same side of the tail of the high-pressure cylinder (5), and are fixed in the high-pressure pump body (1) by a sleeve (12) having a triangular shape, while fixing the other end of the high-pressure cylinder (5) in the high-pressure pump body (1); the piston (10) is placed in the working cavity of the high-pressure cylinder (5); the end of the connecting rod (11) is provided with a connecting groove, and the connecting groove is connected to the high-pressure pump body (1). The elastic claw at one end of the piston is matched to realize quick locking connection and release with the piston (10); when the elastic claw is located in the working chamber of the high-pressure cylinder (5), the hook-shaped structure at the end of the elastic claw is inserted into the connecting groove at the end of the connecting rod (11), thereby realizing the connection between the connecting rod and the piston; the piston moves back and forth in the working chamber driven by the connecting rod; when the end of the piston connected to the connecting rod enters the conical chamber at the end of the high-pressure cylinder (5), the elastic claw is dispersed into the conical chamber under the action of elastic force, and the hook-shaped structure at its end is separated from the groove at the end of the connecting rod (11), thereby realizing quick separation of the connecting rod and the piston; the connecting rod (11) is connected to the plunger rod of the transmission mechanism.

2. The ultra-high pressure generating device for medical water jet according to claim 1, characterized in that: The high-pressure cylinder seat (2) is fixed in the inner hole of the high-pressure pump body (1) by means of a tightening nut (3) and a spring (4).

3. The ultra-high pressure generating device for medical water jet according to claim 1 is characterized in that: The low-pressure water inlet pipe (6), the high-pressure water outlet pipe (7), the water inlet check valve (8), the water outlet check valve (9), the high-pressure cylinder (5) and the piston (10) disposed in the high-pressure cylinder (5) together constitute a disposable quick-assembly component; the low-pressure water inlet pipe (6) and the high-pressure water outlet pipe (7) are integrated and installed in a sleeve (12); one end of the sleeve (12) is connected to a locker (13), and the other end has a boss with a feature similar to a Leroy triangle, and the end of the high-pressure pump body (1) has a section of the same hole structure, and the hole structure is followed by a circular inner hole with a larger aperture; the triangular boss at one end of the sleeve (12) rotates 60 degrees after passing through the high-pressure pump body having the same hole structure at the end, and because the triangular boss has a certain inclined surface, the inclined surface forces the sleeve (12) to push the high-pressure cylinder top tightly into the high-pressure cylinder seat (2) to prevent axial movement during operation.

4. The ultra-high pressure generating device for medical water jet according to claim 3 is characterized in that: The boss with triangular features: under the condition that the cavity diameter d0 is constant, after the triangle is rotationally locked, the contact area between the boss and the baffle of the high-pressure pump body is relatively maximized to ensure the safe use of the locking structure.

5. The ultra-high pressure generating device for medical water jet according to claim 1, characterized in that: The cavity of the high-pressure cylinder (5) is divided into three sections: one is a cylindrical cavity, at which the piston is driven by the connecting rod to perform reciprocating linear motion; the other is a tapered cavity, at which the piston is locked and released with the connecting rod; when assembling the finished product of the quick-connect unit component, the piston is placed in the tapered cavity in the high-pressure cylinder, at which time the piston is in a free state, and the elastic claws in the middle thereof are radially extended outward; when in use, the operator inserts the quick-connect unit into the high-pressure cylinder seat and rotates the sleeve to lock it, and when the piston is pushed by the connecting rod, it leaves the tapered cavity and enters the cylindrical cavity, and the elastic claws of the piston are restrained by the cavity and gather inward, The hook structure at its end is coupled with the groove at the end of the connecting rod, and performs reciprocating linear motion driven by the connecting rod. The upper and lower dead points of the piston movement are both in the cylindrical cavity of the high-pressure cylinder, thereby realizing self-locking of the piston. When an operation is completed and the quick-connect unit components need to be replaced, the sleeve is rotated in the opposite direction and the quick-assembly components are pulled out as a whole. At this time, the piston retreats and disengages from the cylindrical cavity of the high-pressure cylinder driven by the connecting rod, and moves to the tapered hole cavity. The elastic claw returns to its original natural state, and the hook structure disengages from the groove at the end of the connecting rod. The hole retaining ring limits the displacement of the piston to ensure that the piston is separated from the connecting rod, thereby realizing self-loosening of the piston.

6. The ultra-high pressure generating device for medical water jet according to claim 1 or 2, characterized in that: The elastic claws are composed of two, three, four or more hook-shaped structures which are radially expanded outwards in a natural state.

7. The ultra-high pressure generating device for medical water jet according to claim 1 is characterized in that: The low-pressure water inlet pipe and high-pressure water outlet pipe respectively press the water inlet check valve and the water outlet check valve into the upper and lower holes arranged at an angle on the same side of one end of the high-pressure cylinder; wherein the diameter d1 of the cylindrical cavity of the high-pressure cylinder and the maximum distance d2 at the ends of the low-pressure water inlet pipe and the high-pressure water outlet pipe determine the maximum external dimensions of the quick connection unit component, d1 determines the external dimensions of the piston, d2 increases with the increase of the angle α1 between the axes of the low-pressure water inlet pipe and the high-pressure water outlet pipe, and according to the lightweight design requirements, this dimension needs to ensure a smaller design value range; and the angle α1 between the axes of the low-pressure water inlet pipe and the high-pressure water outlet pipe, under the condition that the cylindrical cavity diameter d1 is constant, the larger its value is, the larger the minimum spacing d3 between the bottoms of the low-pressure water inlet and high-pressure water outlet holes in the high-pressure cylinder is.

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