CN114320879B

CN114320879B - Fixing device and method for detachable pressurizing cavity of medical high-pressure pump

Info

Publication number: CN114320879B
Application number: CN202210234573.5A
Authority: CN
Inventors: 史轶伦; 单斌; 李灏; 赵静
Original assignee: Beijing Zhiyu Medical Technology Co ltd
Current assignee: Beijing Zhiyu Medical Technology Co ltd
Priority date: 2022-03-11
Filing date: 2022-03-11
Publication date: 2022-06-24
Anticipated expiration: 2042-03-11
Also published as: CN114320879A

Abstract

The application discloses a fixing device and a method for a detachable pressurizing cavity of a medical high-pressure pump, wherein the fixing device comprises a fixing seat, an inserting plate and an elastic pressing mechanism; the fixed seat is provided with a positioning hole for fixing the peripheral surface of the piston tube of the pressurization cavity; the plug board is movably arranged on the fixed seat and is provided with a notch used for being clamped into the positioning clamping groove on the pressurization cavity; the elastic pressing mechanism is arranged on the positioning end face of the pressurizing cavity and used for pressing the outer side face of the inserting plate through elastic force; the fixing and fixing device can improve the fixing and fixing reliability of the detachable pressurizing cavity of the medical high-pressure pump, and realizes safe and rapid installation and fixing of the pressurizing cavity.

Description

Fixing device and method for detachable pressurizing cavity of medical high-pressure pump

Technical Field

The application relates to the technical field of medical instruments, in particular to a fixing device and a method for a detachable pressurizing cavity of a medical high-pressure pump.

Background

The existing medical equipment relates to the requirements of sanitation and disinfection, and the main parts of the equipment are mostly in disposable or convenient-to-disinfect structures, so that a connection and fixation structure needs to be designed. The medical high-pressure pump is a device which needs to take a pressurizing cavity as a disposable component, and the problem that the joint is invalid due to vibration generated in the working process of the high-pressure pump in the form needs to be solved, and meanwhile, the problems of firm connection, convenience and quickness in the use process of a user need to be considered, so that the connecting mechanism is complex, and the processing and manufacturing, product assembly and subsequent maintenance cost of parts are high.

For example, patent document No. CN206350761U discloses a medical pump fixing device and a medical pump, in which a ratchet mechanism may effectively prevent a pressurizing cavity from falling off, but the ratchet mechanism involves many parts, and most of the parts are fine parts, and the requirement for an operator in terms of assembly or maintenance is high. Patent document No. CN102770086B discloses a disposable pumping system and a coupler, which can stably fix a pressurizing cavity as a circumferential inclined wedge mechanism that realizes self-locking by friction force generated by mutual extrusion of metal materials, but the vibration can disable the mechanism that self-locks by friction force, so that the vibration generated by the high-frequency axial reciprocating force of a pump body in the working process of a plunger reciprocating pump can cause the risk of dropping the pressurizing cavity, resulting in certain risk in equipment with high plunger reciprocating frequency.

Disclosure of Invention

The application provides a fixing device and a fixing method for a detachable pressurizing cavity of a medical high-pressure pump, and aims to improve the fixing firmness and reliability of the detachable pressurizing cavity of the medical high-pressure pump and realize safe and rapid installation and fixing of the pressurizing cavity.

In a first aspect, the present application provides a fixing device of a detachable pressurizing cavity of a medical high-pressure pump, comprising:

the fixed seat is provided with a positioning hole for fixing the peripheral surface of the piston tube of the pressurization cavity;

the plug board is movably arranged on the fixed seat and is provided with a notch which is used for being clamped into the positioning clamping groove on the pressurization cavity;

and the elastic pressing mechanism is arranged on the positioning end face of the pressurizing cavity and used for pressing the outer side face of the inserting plate through elastic force.

The elastic pressing mechanism may specifically include a spring pin and a pressing spring.

More specifically, the positioning end face is provided with a pin hole, the spring pin and the compression spring are arranged in the pin hole, the spring pin is fixed on the positioning end face through the fixing nut, one end face of the spring pin is in contact with the compression spring and arranged in the pin hole, and the other end face of the spring pin is exposed out of the positioning end face for a short distance.

Preferably, the number of the elastic pressing mechanisms is two, and the elastic pressing mechanisms are distributed in a left-right symmetrical mode.

Preferably, a moving mechanism is arranged on the fixed seat and used for moving the plug board, and the moving mechanism comprises:

the spiral groove part is provided with a spiral groove and is used for moving the inserting plate up and down;

the bayonet lock is connected with the inserting plate and is arranged in the spiral groove;

the guide shaft is connected to the fixed seat and arranged in a guide hole formed in the inserting plate;

the telescopic spring is sleeved outside the guide shaft, one end of the telescopic spring is in contact with the fixed seat, and the other end of the telescopic spring is in contact with the plug board and is used for providing an up-and-down moving acting force for the plug board.

In particular, the spiral groove member is connected with the shift lever.

In particular, the bayonet can also be connected to the plug board via a sleeve.

Preferably, the fixing seat is provided with a position detection assembly, the position detection assembly comprises two position feedback elements, namely a first position feedback element and a second position feedback element, the first position feedback element is positioned at the lower side, and the second position feedback element is positioned at the upper side; the pressurizing cavity is provided with a trigger rod for triggering the position feedback element; after the pressurizing cavity is inserted into the positioning hole in place, the trigger rod is pressed to trigger the first position feedback element, and the lower surface of the top of the inserting plate triggers the second position feedback element.

Preferably, the fixing seat is provided with an anti-rotation positioning clamping groove, and the pressurizing cavity is provided with an anti-rotation pin which is clamped into the anti-rotation positioning clamping groove.

In a second aspect, the present application provides a method for fixing a detachable pressurizing cavity of a medical high-pressure pump, which is implemented by the fixing device for a detachable pressurizing cavity of a medical high-pressure pump according to the first aspect of the present application, and comprises the following steps:

when the pressurizing cavity is fixed, the outer peripheral surface of a piston pipe of the pressurizing cavity penetrates through the opening and extends into the positioning hole, the opening is clamped into the positioning clamping groove of the pressurizing cavity by moving the inserting plate, and the elastic pressing mechanism presses the outer side surface of the inserting plate through elastic force;

when the pressurizing cavity is removed, the inserting plate is lifted, so that after the opening is moved out of the positioning clamping groove of the pressurizing cavity, the pressurizing cavity is ejected outwards by the elastic force of the elastic mechanism on the compression of the outer side surface of the inserting plate, and the opening of the inserting plate is dislocated and separated from the positioning clamping groove, so that the pressurizing cavity is moved out.

The utility model provides a fixing device and method of pressure boost cavity can be dismantled to medical high-pressure pump, to in the reciprocating type fluid booster pump of plunger, the pressure boost cavity needs to be fixed firm with the junction of the pump body, because the pump is pressure boost cavity part axial atress in the course of the work, and the axial displacement of pressure boost cavity can cause the working stroke of plunger to reduce, and then cause liquid output flow to reduce, the pressure boost effect reduces, and produce extra vibrations and noise scheduling problem, make the improvement design, it can reach following beneficial effect at least:

1. the elastic pressing mechanism is used for preventing the plunger pump from vibrating to cause connection failure during working, so that the high-pressure plunger pump can be ensured to reliably work in a high-pressure working environment, and excessive vibration and noise generated in the working process are avoided.

2. Can provide the back acting force that produces when offsetting plunger chamber feed liquor through the fixed mode of spring bolt formula, combine many spring hold-down structure, provide the pretension force for the axial fixity of pressure boost cavity does not rely on frictional force, avoids leading to connecting the inefficacy because of the vibration of during operation.

3. The installation and fixation of the pressurizing cavity can be completed by collision extrusion type movement through the inclined plane on the pressurizing cavity and the inserting plate with the telescopic spring and the guide shaft, so that the installation and the disassembly of the pressurizing cavity are convenient; the pressurizing cavity can be automatically flicked off only by rotating the shifting rod, and the pressurizing cavity is pulled out of the fixing device, so that the operation can be completed by one hand.

4. Can provide pressure boost cavity and insert feedback and pressure boost cavity chucking feedback through the position detection subassembly, and can realize the mistake proofing optimization through two position feedback components, two position feedback components detect respectively whether pressure boost cavity inserts and whether the spring catch locks in place, can prevent user's maloperation in the use, improve the security of system.

5. The structure is reasonable, the assembly is convenient, the difficulty and the cost of production and assembly can be effectively reduced, the later equipment maintenance is convenient, and the maintenance cost can be effectively reduced; the connecting firmness of the pressurizing cavity is guaranteed, the reliability of the system under a high-pressure environment is particularly guaranteed, meanwhile, the system is convenient to install and detach, detection and misoperation prevention are facilitated, and better user experience and higher safety are guaranteed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a state diagram of the fixing device of the detachable pressurizing cavity of the medical high-pressure pump according to the present application inserted into the fixed pressurizing cavity;

FIG. 2 is a simplified diagram of a plenum chamber;

FIG. 3 is a front perspective view of the internal structure of the housing of the fixing device for the detachable pressurizing cavity of the medical high-pressure pump according to the present application;

FIG. 4 is a cross-sectional view of the fastening device of the detachable pressurizing cavity of the medical high-pressure pump of the present application after the pressurizing cavity is fastened and fixed;

FIG. 5 is an enlarged view of a portion of FIG. 4 at A;

fig. 6 is an operation schematic diagram of the fixing device for the detachable pressurizing cavity of the medical high-pressure pump according to the present application, which is used for pulling out the pressurizing cavity;

fig. 7 is a schematic diagram of a deflector rod of the fixing device of the detachable pressurizing cavity of the medical high-pressure pump according to the present application before rotation;

FIG. 8 is a sectional view of the bayonet lock and the spiral groove structure of the fixing device for the detachable pressurizing cavity of the medical high-pressure pump according to the present application;

fig. 9 is a schematic view of the fixing device of the detachable pressurizing cavity of the medical high-pressure pump according to the present application after the shift lever rotates;

fig. 10 is a perspective view of a fixing device of a detachable pressurizing chamber of the medical high-pressure pump according to the present application;

FIG. 11 is a schematic view of the fixing device of the present application in a situation where the pressurizing chamber does not trigger the first position feedback element and the insert plate triggers the second position feedback element;

FIG. 12 is a schematic view of the fixing device of the present application in a situation where the pressurizing chamber does not trigger the first position feedback element and the insert plate does not trigger the second position feedback element;

FIG. 13 is a schematic view of a pressurizing chamber of the fixing apparatus of the present application triggering a first position feedback element and an insert plate triggering a second position feedback element;

FIG. 14 is a schematic view of the fixing device of the present application in a state where the pressurizing cavity is not inserted into the fixing base;

FIG. 15 is a schematic view of the fixing device according to the present invention, with the pressurizing cavity inserted into the fixing seat and the inclined surface contacting with the lateral edge;

fig. 16 is a schematic view of the fully fixed state of the pressurizing cavity of the fixing device of the present application.

Reference numerals:

1-a fixed seat, 101-a positioning hole, 102-an anti-rotation positioning clamping groove; 2-inserting plate, 201-gap, 202-sleeve, 203-bayonet and 2031-resistance reducing piece; 3-a pressurizing cavity, 301-the outer peripheral surface of a piston pipe, 302-a positioning end face, 303-a spring pin, 304-a fixing nut, 305-a pressing spring, 306-a position trigger rod, 307-an anti-rotation pin, 308-an inclined plane and 309-a positioning clamping groove; 4-deflector rod, 401-helical groove; 5-a guide shaft, 6-a fixing piece, 7-a telescopic spring, 8-a shell, 9-a detection component, 901-a first position feedback element, 902-a second position feedback element; 10-first screw, 11-second screw, 12-third screw, 13-piston rod, 13 a-extension direction, 13 b-retraction direction.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.

Examples

Referring to fig. 1, a fixing device for a detachable pressurizing cavity of a medical high-pressure pump comprises a fixing seat 1, an inserting plate 2 and an elastic pressing mechanism; referring to fig. 2 and 3, the fixing seat 1 is provided with a positioning hole 101 for fixing the outer circumferential surface 301 of the piston tube of the pressurizing cavity 3; the inserting plate 2 is movably arranged on the fixed seat 1 and is provided with a notch 201 which is clamped into a positioning clamping groove 309 on the pressurizing cavity 3; the elastic pressing mechanism is arranged on the positioning end face 302 of the pressurizing cavity 3 and is used for pressing the outer side face of the inserting plate 2 through elastic force.

In the fixing device, the positioning end surface 302 of the pressurizing cavity 3 is adjacent to the outer side surface of the insert plate 2.

The method for fixing the detachable pressurizing cavity of the medical high-pressure pump comprises the following steps:

when the pressurizing cavity 3 is fixed, the outer peripheral surface 301 of the piston tube of the pressurizing cavity 3 penetrates through the notch 201 and extends into the positioning hole 101, the notch 201 is clamped into the positioning clamping groove 309 of the pressurizing cavity 3 by moving the inserting plate 2, and the elastic pressing mechanism presses the outer side surface of the inserting plate 2 through elastic force;

when the pressurizing cavity 3 is removed, the shifting rod 4 is rotated to lift the inserting plate 2, so that the opening 201 is moved out of the positioning clamping groove 309 of the pressurizing cavity 3, the elastic pressing mechanism is contacted with the elastic force pressing the outer side surface of the inserting plate 2, the pressurizing cavity 3 is ejected outwards for a certain distance, the opening of the inserting plate 2 does not fall into the positioning clamping groove 309 of the pressurizing cavity 3, and the pressurizing cavity 3 can be pulled out.

When the pump works, a piston rod of the pump extends into the piston tube of the pressurizing cavity 3, the elastic pressing mechanism presses the outer side surface of the inserting plate 2 through elastic force, the pressurizing cavity 3 can be prevented from vibrating because the piston rod reciprocates to cause the pressurizing cavity, meanwhile, the fixing device is convenient to assemble and maintain, the defect that the self-locking by friction force is easy to lose efficacy is avoided, the firm reliability is improved, meanwhile, the cost can be effectively controlled, the economic benefit is improved, and the device is convenient for users to use and practical.

Referring to fig. 2, 4-6, in some embodiments, the resilient hold down mechanism includes a spring pin 303 and a hold down spring 305.

According to the fixing method of the detachable pressurizing cavity of the medical high-pressure pump, the pressurizing cavity 3 is fixed, so that the elastic pressing mechanism presses the outer side surface of the inserting plate 2 through elastic force, and the spring pin 303 tightly pushes the inserting plate 2 through the elastic force of the pressing spring 305. The vibration of the pressurizing cavity 3 caused by the reciprocating motion of the piston pipe when the pump works is avoided.

In some embodiments, the positioning end face 302 is provided with a pin hole, the spring pin 303 and the hold-down spring 305 are provided in the pin hole, the spring pin is mounted on the positioning end face by the fixing nut 304, and pre-compression is applied to the hold-down spring 305. The pin holes facilitate the installation, disassembly and maintenance of the spring pins 303 and the hold-down springs 305, and protect the two; meanwhile, the spring pin 303 generates elastic force generated by the extension and contraction of the pressing spring 305, and when the pressing board 2 is moved and jacked, the pin hole plays a role in guiding the spring pin 303 and the pressing spring 305.

According to the fixing method of the detachable pressurizing cavity of the medical high-pressure pump, the pressurizing cavity 3 is fixed, so that when the elastic pressing mechanism presses the outer side surface of the inserting plate 2 through elastic force, the spring pin is installed on the positioning end surface through the fixing nut 304, pre-pressure is applied to the pressing spring 305, and the spring pin 303 pushes the inserting plate 2 through the elastic force of the pressing spring 305.

In other embodiments, compression spring 305 is fixedly attached at one end to spring pin 303.

In other embodiments, the other end of the hold-down spring 305 contacts the retention end face 302, or contacts the bottom surface of a pin hole provided in the retention end face 302.

In other embodiments, the other end of the compression spring 305 is fixedly connected with the positioning end face 302 or the bottom surface of the pin hole.

In some embodiments, the number of the elastic pressing mechanisms is at least two, for example, the number of the elastic pressing mechanisms is two, and the elastic pressing mechanisms are symmetrically distributed and fixed at the left and right positions of the positioning end face, so that uniform elastic force can be provided to press the outer side face of the inserting plate 2, and the vibration of the pressurizing cavity 3 caused by the reciprocating motion of the piston rod can be better avoided.

Referring to fig. 7 to 9, in some embodiments, the fixing base 1 is provided with a moving mechanism for moving the board 2, and the moving mechanism includes: a spiral groove member, a bayonet 203, a guide shaft 5 and a telescopic spring 7; the spiral groove part is provided with a spiral groove 401 for moving the inserting plate 2 up and down; the bayonet 203 is connected with the insert plate 2 and is arranged in the spiral groove 401; the guide shaft 5 is connected to the fixed seat 1 and is arranged in a guide hole formed in the inserting plate 2; the telescopic spring 7 is sleeved outside the guide shaft 5, one end of the telescopic spring is in contact with the fixed seat 1, and the other end of the telescopic spring is in contact with the inserting plate 2, so that an up-and-down moving acting force is provided for the inserting plate 2.

In the fixing device, the movement of the inserting plate 2 is realized through the extension and contraction of the extension spring 7, and the guide shaft 5 plays a role in guiding the movement of the inserting plate 2. Each guide shaft 5 is sleeved with a telescopic spring 7, and the function of the telescopic spring is to increase the reliability and the quick response performance of the movement action of the plugboard 2.

According to the fixing method for the detachable pressurizing cavity of the medical high-pressure pump, when the inserting plate 2 is moved, the spiral groove 401 is rotated, so that the bayonet 203 slides in the spiral groove 401 and moves up and down at the same time, and the inserting plate 2 is driven to move up and down.

Referring to fig. 8, in other embodiments, the detent 203 is provided with a resistance reducing member 2031, and the resistance reducing member 2031 may be a sliding sleeve or a microsphere bearing, so as to reduce the resistance to movement in the spiral groove 401 and facilitate operation.

In some embodiments, the helical groove member is connected to the shift lever 4.

According to the fixing method of the detachable pressurizing cavity of the medical high-pressure pump, when the spiral groove 401 is rotated, the rotation of the spiral groove 401 is realized by stirring the rotary shift lever 4. The operation is convenient.

Referring to fig. 3, a toggle lever 4 may be attached to the top of the spiral channel.

In some embodiments, bayonet 203 is connected to board 2 by sleeve 202. That is, the bayonet 203 is protrudingly connected to the sleeve 202, and the sleeve 202 is connected to the board 2, which facilitates the installation of the bayonet 203 and also helps to ensure the moving space of the bayonet 203 in the spiral groove 401 and the moving space of the board 2.

Referring to fig. 3, the sleeve 202 may have a circular ring shape. The sleeve 202 may be attached to the top of the board 2.

Fig. 7 and 9 show the operating principle of the shift lever 4. Referring to fig. 7, in the normal state, the insert plate 2 on the fixing device of the pressurizing cavity 3 is always at the lowest position of falling, and in this position, the insert plate 2 is in a state of clamping the pressurizing cavity 3. It can be seen that the cylindrical bayonet 203 on the sleeve 202 at the top of the board 2 is embedded into the spiral groove 401 of the shift lever 4, and at this time, the shift lever 4 is rotated clockwise or counterclockwise according to the spiral direction of the spiral groove 401, so that the spiral groove 401 deflects, and the bayonet 203 is driven to move in the spiral groove 401, thereby driving the whole board 2 to move. And the inserting plate 2 can only move upwards due to the limitation of a guide mechanism formed by the guide shaft 5 and the telescopic spring 7. Fig. 9 shows the state where the board 2 is lifted to the uppermost position.

Referring to fig. 1, in other embodiments, the fixing base 1 is provided with a rod hole, the guide shaft 5 passes through the rod hole, and one end of the guide shaft passing through the rod hole is provided with a fixing member 6.

In other embodiments, the fixing member 6 may be a retainer ring, a washer, or a nut fixedly coupled to the end of the guide shaft 5.

Referring to fig. 10, in other embodiments, the fixture is provided externally with a housing 8. The shell, 8 inside fixing bases 1 that mainly have of shell, the disposable part pressure boost cavity 3 of fixing base 1 mainly used fixed separation.

Fig. 10 shows the pressurizing chamber 3 without the pump body and the housing 8 of the fixture, with the pressurizing chamber 3 in a state without the fixture.

And figure 1 shows the pressurizing chamber 3 after it has been inserted into the fixing device. It can be seen that the fixing seat 1 is a main positioning and fixing component of the pressurizing cavity 3, and the inserting plate 2 which can move up and down is arranged on the fixing seat. The fixed seat 1 can be installed at the front end of the pump body through a second screw 11 and a third screw 12. The fixing seat 1 can be in an L shape, the inserting plate 2 can be in an inverted C shape, and the bending structures of the fixing seat and the inserting plate can be bent at right angles. Namely, the inserting plate 2 can be an integral processing structure or an assembly frame structure, and the inserting plate 2 is sleeved on the fixing seat 1 in a half-wrapped mode and used for clamping and fixing the pressurizing cavity 3. The deflector rod 4 can be arranged above the fixed seat 1 and used for lifting the inserting plate 2. The up-and-down movement of the inserting plate 2 on the fixed seat 1 is realized through the guide shaft 5. The number of the guide shafts 5 and the number of the extension springs 7 can be two and are evenly and symmetrically distributed. Both ends of the guide shaft 5 can be provided with fixing parts 6, for example, both ends of the guide shaft are fixed on the inserting plate 2 through check rings. An extension spring 7 positioned between the bottom of the fixed seat 1 and the bottom of the inserting plate 2 is sleeved outside the lower end of the guide shaft 5, and the extension spring 7 is used for keeping the inserting plate 2 in a falling state.

Referring to fig. 11 to 13, in some embodiments, the fixing base 1 is provided with a position detection assembly 9, the position detection assembly 9 includes at least two position feedback elements distributed from top to bottom, and the pressurizing cavity 3 is provided with a position triggering rod 306 for triggering the position feedback elements.

Referring to fig. 1, a position detecting assembly 9 may be installed at one side of the fixing base 1, and may be installed on the fixing base 1 by a first screw 10.

It can be seen that a position detection assembly 9 is mounted on the side of the mounting block 1 for providing a valid signal to the host that the pressurizing chamber 3 has been inserted and clamped. Two position feedback elements may be provided on the position sensing assembly 9. The position detection feedback element can be a micro-motion position feedback element, a proximity sensor and other sensors. The two position detection feedback elements can be respectively used for determining the insertion of the pressurizing cavity 3 and the clamping of the pressurizing cavity 3, and only when the two position detection feedback elements are triggered simultaneously, the pressurizing cavity 3 can be considered to be effectively clamped and fixed.

The specific working condition may be that a raised trigger rod 306 for triggering the position feedback element is disposed on the pressurizing cavity 3, the position detecting assembly 9 includes two position feedback elements, namely a first position feedback element 901 and a second position feedback element 902, the first position feedback element 901 is located at the lower side, and the second position feedback element 902 is located at the upper side; when the pressurizing cavity 3 is inserted into the positioning hole 101 to a proper position, the triggering rod 306 is pressed to trigger the first position feedback element 901, and the lower surface of the top of the insert plate 2 triggers the second position feedback element 902.

Fig. 11 shows the situation where the first position feedback element 901 is not triggered by the pressurizing cavity 3 and the second position feedback element 902 is triggered by the insert plate 2; fig. 12 shows the situation where the first position feedback element 901 is not activated by the pressurizing cavity 3 and the second position feedback element 902 is not activated by the insert plate 2; fig. 13 shows the situation where the pressurizing cavity 3 triggers the first position feedback element 901 and the insert plate 2 triggers the second position feedback element 902;

when the pressurizing cavity 3 is inserted into the positioning hole 101 to a proper position, the triggering rod 306 is pressed to trigger the first position feedback element 901, and the lower surface of the top of the inserting plate 2 triggers the second position feedback element 902;

when the pressurizing cavity 3 is inserted in place or the pressurizing cavity 3 is not inserted, and the inserting plate 2 is in a falling state, the second position feedback element 902 is triggered; conversely, when the board 2 is lifted by the lever 4 or the board 2 is jacked up during the insertion of the pressurizing cavity 3, the second position feedback element 902 is not activated.

As can be seen, only when the two position feedback elements, namely the first position feedback element 901 and the second position feedback element 902, are in the triggered state at the same time, the main machine will determine that the supercharging cavity 3 has been effectively fixed, and then may operate.

According to the fixing method for the detachable pressurizing cavity of the medical high-pressure pump, when the pressurizing cavity 3 is fixed, and two position feedback elements, namely the first position feedback element 901 and the second position feedback element 902, are simultaneously in a trigger state, the host judges that the pressurizing cavity 3 is effectively fixed, and then the pump works.

Referring to fig. 2 and 3, in some embodiments, the fixing base 1 is provided with an anti-rotation positioning slot 102, and the pressurizing cavity 3 is provided with an anti-rotation pin 307 for being clamped into the anti-rotation positioning slot 102.

According to the fixing method of the detachable pressurizing cavity of the medical high-pressure pump, the pressurizing cavity 3 is fixed, and when the outer peripheral surface 301 of the piston tube of the pressurizing cavity 3 penetrates through the notch 201 and extends into the positioning hole 101, the anti-rotation pin 307 is clamped into the anti-rotation positioning clamping groove 102;

and (3) removing the pressurizing cavity 3, and moving the outer peripheral surface 301 of the piston tube of the pressurizing cavity 3 out of the positioning hole 101 and the notch 201, and moving the anti-rotation pin 307 out of the anti-rotation positioning clamping groove 102.

Referring to fig. 3, the positioning hole 101 may be a circular hole. The opening 201 is arc-shaped, and the opening 201 is used for clamping the pressurizing cavity 3.

Referring to fig. 14 to 16, in some embodiments the gap 201 is provided with a transverse portion for contacting a ramp 308 on the positioning plenum body 3. The number of the transverse parts can be two and the transverse parts are evenly and symmetrically distributed.

The fixing method of the detachable pressurizing cavity of the medical high-pressure pump of the embodiment fixes the pressurizing cavity 3, the pressurizing cavity 3 is used for enabling the piston pipe peripheral surface 301 to penetrate through the notch 201 and stretch into the positioning hole 101, the inclined surface 308 abuts against the notch 201 on the insert plate 2 to jack up the insert plate 2, the insert plate 2 continuously contacts with the surface of the pressurizing cavity 3 through the notch 201 after the pressurizing cavity 3 is continuously inserted, the insert plate is in a rising state or a lifting state until the positioning clamping groove 309 on the pressurizing cavity 3 partially reaches the notch 201, the section of the inclined surface 308 is changed and reduced, the insert plate 2 rapidly falls under the driving of the telescopic spring 7, and the notch 201 is clamped in the positioning clamping groove 309 to clamp the pressurizing cavity 3.

In the fixing device, the inserting plate 2 is used for clamping and inserting the disposable pressurizing cavity 3 on the fixing seat 1, the pressurizing cavity 3 is provided with the positioning clamping groove 309, and the front end of the positioning clamping groove 309 is provided with the inclined surface 308. When the pressurizing cavity 3 is inserted, the inclined plane 308 contacts with the notch 201 on the inserting plate 2 to jack up the inserting plate 2, the inserting plate 2 continues to contact with the surface of the pressurizing cavity 3 through the notch 201 after the pressurizing cavity 3 is inserted continuously, the inserting plate is in a state of ascending or keeping the inserting plate lifted until the positioning clamping groove 309 on the pressurizing cavity 3 reaches the position of the notch 201, the section of the inclined plane 308 is changed to be small, the inserting plate 2 rapidly falls under the driving of the telescopic spring 7, and the notch 201 is clamped in the positioning clamping groove 309 to clamp and fix the pressurizing cavity 3. Although the pump can vibrate during operation, due to the effect of the extension spring 7 between the inserting plate 2 and the fixing seat 1, the inserting plate 2 is always in a falling state, and meanwhile, the pressurizing cavity 3 and the fixing seat 1 are axially matched, so that the vertical vibration is avoided, and the inserting plate 2 is prevented from being lifted to loosen the pressurizing cavity 3.

With reference to fig. 4 and 5, it can be seen that the action of the spring pin 303 and the hold-down spring 305 in the compressed state causes the pressurizing chamber 3 to have a tendency to move towards the outside. Because the clamping groove 309 of the pressurizing cavity 3 needs to have the matching requirement of relative movement with the notch 201 of the inserting plate 2, the width of the positioning clamping groove 309 is larger than the thickness of the notch 201, a gap exists between the positioning clamping groove 309 and the notch 201, the gap can generate vibration to bring noise in the work of the pump, and the efficiency of the pump can be influenced if the amplitude is too large. This gap is always kept outside the card 2 due to the reaction force of the hold-down spring 305. At the same time, the movement tendency of the pressurizing chamber 3 coincides with the extending direction 13a of the piston rod 13 of the pump (the direction of pumping out the high-pressure water flow, as indicated by the arrow toward the right in fig. 4), so that the gap does not change due to the high pressure generated. When the pump runs to a period of pumping water, the retraction direction of the piston rod 13 is 13b (shown by a left arrow in fig. 4), and the compression spring 305 is used for offsetting the retraction acting force of the piston rod 13, but the force tending to change the direction of the gap between the positioning clamping groove 309 and the insertion plate 2 in the retraction direction of the piston rod 13 is smaller than the acting force of the compression spring 305, so that the spring pin 303 is not sufficiently compressed, and the positioning clamping groove 309 and the gap 201 generate a gap on the inner side of the insertion plate 2, thereby causing vibration.

Referring next to fig. 14 to 16, fig. 14 to 16 show the process of inserting the pressurizing cavity 3 into the fixing base 1 and fixing firmly. As shown in fig. 14, the pressurizing cavity 3 is not inserted into the fixing seat 1, and the insert plate 2 is at the lowest position; before the pressurizing chamber 3 is ready to be inserted and mounted, the inclined surface 308 faces upward and the rotation preventing pin 307 faces downward in the direction shown in fig. 14. When the pressurizing chamber 3 is inserted into the fixing base 1, as shown in fig. 15, the outer circumferential surface 301 of the piston tube of the pressurizing chamber 3 enters the positioning hole 101 in a positioning fit relationship therewith, and then the inclined surface 308 contacts with the two transverse portions of the notch 201. As shown in fig. 7, when the pressure-increasing cavity 3 is inserted, the short transverse edge of the notch 201 of the insert plate 2 moves upwards along the inclined surface 308 due to the inclined angle of the inclined surface 308. Until the positioning clamping groove 309 of the pressurizing cavity 3 enters the position where the inserting plate 2 is located, the diameter of the positioning clamping groove 309 is reduced, so that the transverse part of the opening 201 is instantly suspended, at the moment, the inserting plate 2 quickly falls under the action of the telescopic spring 7 and the guide shaft 5 below the fixed seat 1, all the openings 201 are clamped into the positioning clamping groove 309, and the pressurizing cavity 3 is completely clamped and fixed; the two spring pins 303 arranged on the positioning end face 302 are in a compressed state after the pressurizing cavity 3 is clamped and fixed, and continuously provide an outward reaction force, namely a force towards the direction of the inserting plate 2, for the pressurizing cavity 3, and simultaneously the reaction force is consistent with the extending direction 13a (pumping out high-pressure water flow) of the piston rod 13 of the pump, so that the gap change caused by the generated high pressure is avoided, and therefore the inner side wall of the opening 201 of the inserting plate 2 is completely attached to the inner side face of the positioning clamping groove 309 of the pressurizing cavity 3, namely the gap between the opening 201 and the positioning clamping groove 309 is always kept outside the inserting plate 2; when the pump is operated to a period of pumping water, the piston rod 13 is retracted, the retraction direction 13b is opposite to the acting force of the pressing spring 305, but the generated pressure is small enough to compress the pressing spring 305 so that the spring pin 303 causes a gap to be generated on the inner side of the inserting plate 2, namely, the vibration is not enough to be generated; thereby avoiding the pumping chamber 3 from vibrating due to the clearance change caused by the reciprocating motion of the piston rod 13 when the pump is working.

Referring to fig. 6, when the pressurizing cavity 3 needs to be pulled out, the shifting lever 4 is rotated counterclockwise or clockwise according to the spiral direction of the spiral groove 401, which is opposite to the spiral direction when the pressurizing cavity 3 is inserted, so as to lift the inserting plate 2. After the notch 201 of the inserting plate 2 is separated from the positioning slot 309 of the pressurizing cavity 3, the pressurizing cavity 3 is no longer blocked by the notch 201, so that the pressurizing cavity 3 can be pulled out.

After the opening 201 of the inserting plate 2 is separated from the positioning clamping groove 309 of the pressurizing cavity 3, because the hold-down spring 305 on the pressurizing cavity 3 is in a compression state at the moment, the pressurizing cavity 3 may be popped out for a certain distance outwards, even if the shift lever 4 is loosened at the moment, because the opening 201 and the positioning clamping groove 309 are staggered, namely, the opening 201 is positioned outside the clamping groove 309 of the pressurizing cavity 3, the pressurizing cavity 3 cannot be clamped, namely, the inserting plate 2 cannot fall down, the pressurizing cavity 3 can be pulled out, and the one-hand operation can be realized.

The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art to which the present application pertains. Any modification, equivalent replacement, improvement or the like made within the spirit and principle of the present application shall be included in the scope of the claims of the present application.

Claims

1. The utility model provides a fixing device of pressure boost cavity can be dismantled to medical high-pressure pump which characterized in that includes:

the plug board is movably arranged on the fixed seat and is provided with a notch used for being clamped into a positioning clamping groove on the pressurization cavity;

the elastic pressing mechanism is arranged on the positioning end face of the pressurizing cavity and used for pressing the outer side face of the inserting plate through elastic force;

set up moving mechanism on the fixing base for remove the picture peg, moving mechanism includes:

the bayonet lock is connected to the inserting plate and arranged in the spiral groove;

the telescopic spring is sleeved outside the guide shaft, one end of the telescopic spring is in contact with the fixing seat, and the other end of the telescopic spring is in contact with the plug board and is used for providing an up-and-down moving acting force for the plug board.

2. The utility model provides a fixing device of pressure boost cavity can be dismantled to medical high-pressure pump which characterized in that includes:

the fixed seat is provided with a positioning hole for fixing the peripheral surface of the piston pipe of the pressurization cavity;

the fixed seat is provided with a position detection assembly, the position detection assembly comprises two position feedback elements, namely a first position feedback element and a second position feedback element, the first position feedback element is positioned at the lower side, and the second position feedback element is positioned at the upper side; the pressurizing cavity is provided with a trigger rod for triggering the position feedback element; after the pressurizing cavity is inserted into the positioning hole in place, the trigger rod is pressed to trigger the first position feedback element, and the lower surface of the top of the inserting plate triggers the second position feedback element.

3. The fixing device for the detachable pressurizing cavity of the medical high-pressure pump as claimed in claim 1 or 2, wherein the elastic pressing mechanism comprises a spring pin and a pressing spring.

4. The device for fixing the detachable pressurizing cavity of the medical high-pressure pump according to claim 3, wherein the positioning end face is provided with a pin hole, the spring pin is fixed on the positioning end face through a fixing nut, one end face of the spring pin is in contact with the pressing spring and is arranged in the pin hole, and the other end face of the spring pin is exposed out of the positioning end face for a short distance.

5. The fixing device for the detachable pressurizing cavity of the medical high-pressure pump as claimed in claim 1 or 2, wherein the number of the elastic pressing mechanisms is two, and the two elastic pressing mechanisms are distributed in a bilateral symmetry manner.

6. The device for fixing the detachable pressurizing cavity of the medical high-pressure pump according to claim 1, wherein the spiral groove member is connected with a deflector rod.

7. The device for fixing the detachable pressurizing cavity of the medical high-pressure pump according to claim 6, wherein the bayonet is connected to the insert plate through a sleeve.

8. The fixing device of the detachable pressurizing cavity of the medical high-pressure pump according to claim 1, wherein a position detecting component is arranged on the fixing seat, the position detecting component comprises two position feedback elements, namely a first position feedback element and a second position feedback element, the first position feedback element is positioned at the lower side, and the second position feedback element is positioned at the upper side; the pressurizing cavity is provided with a trigger rod for triggering the position feedback element; after the pressurizing cavity is inserted into the positioning hole in place, the trigger rod is pressed to trigger the first position feedback element, and the lower surface of the top of the inserting plate triggers the second position feedback element.

9. The fixing device of the detachable pressurizing cavity of the medical high-pressure pump as claimed in claim 1 or 2, wherein the fixing seat is provided with an anti-rotation positioning slot, and the pressurizing cavity is provided with an anti-rotation pin which is clamped into the anti-rotation positioning slot.

10. A method for fixing a detachable pressurizing cavity of a medical high-pressure pump, which is realized by the fixing device for the detachable pressurizing cavity of the medical high-pressure pump according to any one of claims 1 to 9, and comprises the following steps:

when the pressurizing cavity is fixed, the outer peripheral surface of the piston tube of the pressurizing cavity penetrates through the opening and extends into the positioning hole, and the opening is clamped into the positioning clamping groove of the pressurizing cavity by moving the inserting plate, so that the elastic pressing mechanism presses the outer side surface of the inserting plate through elastic force;

demolish during the pressure boost cavity, through mentioning the picture peg, make the opening shifts out the pressure boost cavity behind the positioning channel section, elasticity hold-down mechanism is right the elastic force of the compressing tightly of picture peg lateral surface will the pressure boost cavity is outwards ejecting, this moment the picture peg the opening with the positioning channel section dislocation breaks away from, thereby shifts out the pressure boost cavity.