CN219774280U - medical pump - Google Patents

Abstract

The utility model provides a medical pump, which relates to the field of medical equipment, and comprises a piston pump, an end cover, a valve assembly and a driving head, wherein the piston pump comprises a pump body and a piston rod, the pump body is provided with a compression cavity, and the piston rod is slidably inserted into the compression cavity; the end cover is provided with a first channel and a second channel and is detachably connected with the piston pump; the valve assembly comprises a first one-way valve and a second one-way valve which are opposite in conducting direction, the first one-way valve and the second one-way valve are both detachably connected with the compression cavity, the first one-way valve is used for conducting the first channel and the compression cavity when the volume of the compression cavity is increased, and the second one-way valve is used for conducting the second channel and the compression cavity when the volume of the compression cavity is reduced; the driving head is detachably connected with the pump body and is used for rotating around a preset axis so as to drive the piston rod to slide back and forth in the extending direction of the preset axis. The medical pump is convenient to detach, convenient to clean, good in cleaning effect, reusable, not easy to cross-infect, and safe and reliable to use.

Description

Medical pump

Technical Field

The utility model relates to the field of medical equipment, in particular to a medical pump.

Background

Most of the existing medical pumps are disposable products, cannot be reused for multiple times, and have high running cost. If the medical pump in the prior art is directly reused, the situation that the one-way valve hole in the pump body is blocked easily exists, and after the one-way valve hole is blocked, the pump body cannot be normally used, and the operation reliability is poor. In addition, if the pump body is reused, because the internal structure of the pump body is complex, the components such as the internal cavity of the pump body and the check valve arranged in the internal cavity of the pump body cannot be effectively cleaned, and the internal cavity of the pump body and the check valve can not thoroughly cause infection of a patient due to sterilization, so that the use safety is poor.

The inventor researches find that the existing medical pump has at least the following disadvantages:

disposable, the cost is high; the structure is complex, the internal cleaning is inconvenient, and if the device is repeatedly used, the device is easy to have blockage; the inside is not clean in place, cross infection is easy to occur, and the safety is poor.

Disclosure of Invention

The utility model aims to provide a medical pump which can improve the cleaning effect, can be reused for a plurality of times, is not easy to be blocked, is not easy to cross-infect, and has high stability, safety and reliability.

Embodiments of the present utility model are implemented as follows:

the present utility model provides a medical pump comprising:

the piston pump comprises a pump body and a piston rod, wherein the pump body is provided with a compression cavity, and the piston rod is slidably inserted into the compression cavity; the end cover is provided with a first channel and a second channel which are mutually independent, and the end cover is detachably connected with the piston pump; the valve assembly comprises a first one-way valve and a second one-way valve which are opposite in conducting direction, the first one-way valve and the second one-way valve are both detachably connected with the compression cavity, the first one-way valve is used for conducting the first channel and the compression cavity when the volume of the compression cavity is increased, and the second one-way valve is used for conducting the second channel and the compression cavity when the volume of the compression cavity is reduced; the driving head is detachably connected with the pump body and is used for rotating around a preset axis so as to drive the piston rod to slide back and forth in the extending direction of the preset axis, and therefore the volume of the compression cavity is adjusted.

In an alternative embodiment, the piston pump further comprises an elastomer coupled to both the pump body and the piston rod for imparting a tendency for the piston rod to move out of the pump body.

In an alternative embodiment, the drive head is provided with a first drive surface provided as a wave surface extending in the circumferential direction of a preset axis, which wave surface abuts the piston rod; when the position of the wave surface abutting against the piston rod moves from the trough to the crest, the wave surface drives the piston rod to move along the direction of inserting the piston rod into the compression cavity; when the position of the wavy surface abutting against the piston rod moves from the crest to the trough, the elastic body drives the piston rod to extend out of the compression cavity.

In an alternative embodiment, the drive head is provided with a second drive surface, which is provided as a bevel, which abuts the piston rod; when the position of the inclined surface abutting against the piston rod moves from the high side far away from the piston rod to the low side close to the piston rod, the inclined surface drives the piston rod to move along the direction of inserting the compression cavity; when the position of the inclined surface abutting against the piston rod moves from the low side to the high side, the elastic body drives the piston rod to extend out of the compression cavity.

In an alternative embodiment, the medical pump further comprises a base, the base is provided with a guide hole, the pump body is inserted into the guide hole, and the pump body is detachably connected with the base; the driving head is inserted into the guide hole and is matched with the base in a rotatable mode.

In an alternative embodiment, the number of the piston pumps is a plurality, the number of the valve assemblies is a plurality, and the plurality of the valve assemblies are respectively matched with the plurality of the piston pumps in a one-to-one correspondence manner; the first check valves of the valve assemblies are used for conducting the first channel and the compression cavity when the volume of the compression cavity is increased, and the second check valves of the valve assemblies are used for conducting the second channel and the compression cavity when the volume of the compression cavity is reduced; the driving head is matched with a plurality of piston rods of a plurality of piston pumps at the same time and is used for driving a plurality of piston rods to move in the extending direction of a preset axis, and the moving directions of at least two piston rods in the plurality of piston rods are opposite.

In an alternative embodiment, the end cap has a first collection channel and a second collection channel, the first collection channel communicating with the first channel, the first collection channel disposed around the second collection channel, the second collection channel communicating with the second channel; the pump body encloses the notches of the first and second sink tanks.

In an alternative embodiment, a first sealing ring and a second sealing ring are arranged between the end cover and the pump body, the first collecting groove is located between the first sealing ring and the second sealing ring, and the second collecting groove is located in an area surrounded by the first sealing ring.

In an alternative embodiment, the end cap is threadably coupled to the pump body.

In an alternative embodiment, the driving head comprises a connecting plate, a driving rod and a transmission rod, wherein the driving rod and the transmission rod are fixedly connected with the connecting plate, and the driving rod is used for driving the piston rod to stretch and retract; the transmission rod is used for being matched with the motor.

The embodiment of the utility model has the beneficial effects that:

to sum up, the medical pump that this embodiment provided, including piston pump, end cover, valve subassembly and actuating head, the piston pump includes pump body and piston rod, and end cover and pump body detachably are connected, and valve subassembly detachably installs in the pump body, and actuating head and pump body detachably are connected, and actuating head can drive the piston rod and reciprocate to flexible, thereby adjust the volume of compression chamber, realize the action of liquid business turn over compression chamber from the check valve that corresponds. When the medical pump needs to be cleaned, the end cover is disassembled, the valve assembly is taken down, the driving head and the piston rod are disassembled from the pump body, so that the medical pump is split into a plurality of independent parts, each independent part is convenient to clean, the position of the valve assembly mounted in the piston pump can be effectively exposed after the valve assembly is disassembled, the cleaning dead angle is not easy to exist, and the inside of the pump body is also convenient to clean. After the medical pump is cleaned, the medical pump can be assembled again, so that the repeated use is realized, the resources are saved, the running cost is reduced, the medical pump has good cleaning effect, the situation of blockage is not easy to occur during the repeated use, the situation of cross infection is also not easy to occur, and the medical pump is safe and reliable.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a medical pump according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a medical pump according to an embodiment of the present utility model;

FIG. 3 is a first cross-sectional structural schematic view of a medical pump according to an embodiment of the present utility model;

FIG. 4 is a second cross-sectional structural schematic view of a medical pump according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of a piston pump according to an embodiment of the present utility model;

FIG. 6 is a schematic view of a pump body according to an embodiment of the present utility model;

FIG. 7 is a schematic view of an end cap according to an embodiment of the present utility model;

FIG. 8 is a schematic view of a base structure according to an embodiment of the present utility model;

FIG. 9 is a schematic diagram of a driving head according to an embodiment of the present utility model;

fig. 10 is a schematic structural view of a modification of the medical pump according to the embodiment of the present utility model.

Icon:

100-piston pump; 110-a pump body; 111-compression chambers; -a stop lever; 120-a piston rod; 121-sealing heads; 122-rod body; 123-force transmission head; 130-a separator; 131-a first stepped hole; 132-second stepped bore; 140-an elastomer; 150-a substrate; 151-a first annular groove; 152-a second annular groove; 160-a first sealing ring; 170-a second seal ring; 200-end caps; 210-a first channel; 220-a second channel; 230-a first sink; 240-a second sink; 300-valve assembly; 301-a first valve assembly; 302-a second valve assembly; 310-a first one-way valve; 320-a second one-way valve; 400-driving head; 410-connecting plates; 420-driving rod; 430-a drive rod; 431—a drive face; 4311-peaks; 4312-troughs; 500-base; 510-pilot holes.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Among the prior art, medical pump includes main part and valve body, and main part structure as an organic whole adopts two parts welded fastening generally, before the welding, is located the suitable position with the valve body earlier, and after the welding, the valve body is located inside the main part, and the valve body is wrapped up by the main part. Therefore, after the medical pump is used, residual liquid in the medical pump is not easy to discharge, and cleaning liquid generally flows repeatedly in the flow channel, so that the dead angle in the main body and the valve body are not easy to clean, the cleaning effect is poor, the medical pump is easy to block after repeated use, and the risk of cross infection exists. Therefore, the conventional medical pump cannot be generally reused, and the use cost is high.

In view of the above, the designer provides a medical pump which can be split into a plurality of independent components, each component is convenient to clean, the cleaning effect is good, and the medical pump can be repeatedly used for a plurality of times after being assembled together after being cleaned, so that the cost is reduced; meanwhile, the cross infection is not easy to occur, and the use is safe and reliable.

Referring to fig. 1-10, in the present embodiment, the medical pump includes a piston pump 100, an end cap 200, a valve assembly 300 and a driving head 400, the piston pump 100 includes a pump body 110 and a piston rod 120, the pump body 110 has a compression chamber 111, and the piston rod 120 is slidably inserted into the compression chamber 111; the end cap 200 is provided with a first channel 210 and a second channel 220 which are independent of each other, and the end cap 200 is detachably connected with the piston pump 100; valve assembly 300 includes first check valve 310 and second check valve 320 having opposite communication directions, first check valve 310 and second check valve 320 being detachably connected to compression chamber 111, first check valve 310 for communicating first passage 210 with compression chamber 111 when the volume of compression chamber 111 increases, and second check valve 320 for communicating second passage 220 with compression chamber 111 when the volume of compression chamber 111 decreases; the driving head 400 is detachably connected with the pump body 110, and the driving head 400 is used for rotating around a preset axis to drive the piston rod 120 to reciprocally slide in the extending direction of the preset axis, thereby adjusting the volume of the compression chamber 111.

In view of the above, the usage of the medical pump provided in this embodiment is as follows:

the first channel 210 and the second channel 220 are respectively communicated with corresponding containers, the driving head 400 is started, and in the process of rotating the driving head 400 around a preset axis, the piston rod 120 can be driven to reciprocate in the extending direction of the preset axis, namely, the driving head 400 and the piston rod 120 are matched to convert rotary motion into linear telescopic motion. The volume of the compression chamber 111 defined by the piston rod 120 and the pump body 110 together is continuously adjusted during the reciprocation of the piston rod 120. That is, when the piston rod 120 is pulled out with respect to the pump body 110, the length of the piston rod 120 exposed to the outside of the pump body 110 gradually increases, and at this time, the volume of the compression chamber 111 increases, and the liquid enters from the first passage 210 and passes through the first check valve 310 into the compression chamber 111; when the piston rod 120 is inserted with respect to the pump body 110, the length of the piston rod 120 exposed to the outside of the pump body 110 is gradually reduced, and at this time, the volume of the compression chamber 111 is reduced, and the liquid is introduced into the second passage 220 from the compression chamber 111 through the second check valve 320, and is discharged from the second passage 220, thereby achieving repeated pumping of the liquid. When the medical pump needs to be cleaned, the end cover 200 is disassembled, the valve assembly 300 is taken down, the driving head 400 and the piston rod 120 are detached from the pump body 110, so that the medical pump is split into a plurality of independent components, each independent component is convenient to clean, the position of the valve assembly 300 mounted in the piston pump 100 can be effectively exposed after the valve assembly 300 is detached, no cleaning dead angle exists easily, and the inside of the pump body 110 is also very convenient to clean. After the medical pump is cleaned, the medical pump can be assembled again, so that the repeated use is realized, the resources are saved, the running cost is reduced, the medical pump has good cleaning effect, the situation of blockage is not easy to occur during the repeated use, the situation of cross infection is also not easy to occur, and the medical pump is safe and reliable.

The following examples illustrate the detailed structure of the medical pump of the present utility model.

Referring to fig. 3-4, in the present embodiment, it should be noted that the number of the valve assemblies 300 may be plural, for example, in the present embodiment, the number of the valve assemblies 300 is four. Correspondingly, the number of the piston pumps 100 is four, and the four piston pumps 100 are respectively matched with the four valve assemblies 300 in a one-to-one correspondence manner. And, two valve assemblies 300 are grouped in one group among the four valve assemblies 300, the four valve assemblies 300 are equally divided into two groups, the operation states of the two valve assemblies 300 of the same group are identical, the operation states of the two valve assemblies 300 of the same group are opposite, that is, when the two valve assemblies 300 of the same group are operated, the action that liquid is sucked into the compression chamber 111 is simultaneously realized, or the action that liquid is extruded out of the compression chamber 111 is simultaneously realized. For example, for convenience of description, the four valve assemblies 300 are respectively two first valve assemblies 301 and two second valve assemblies 302, the two first valve assemblies 301 are disposed at opposite intervals, the two second valve assemblies 302 are disposed at opposite intervals, the two first valve assemblies 301 and the two second valve assemblies 302 are alternately disposed at intervals in a circumferential direction of a predetermined axis, and when the two first valve assemblies 301 perform a liquid suction action at the same time and the two second valve assemblies 302 perform a liquid discharge action at the same time.

It should be understood that the structure of each valve assembly 300 and each piston pump 100 are set to be identical, and the operating states are different only at the same time, and thus, in the present embodiment, only the structure of one set of valve assemblies 300 and piston pumps 100 is described as an example.

Referring to fig. 5-6, in this embodiment, alternatively, the pump body 110 has opposite first and second ports, the piston rod 120 is inserted into the pump body 110 from the first port, and the end cap 200 is detachably mounted at the second port. The pump body 110 is provided with a diaphragm 130 inside, the diaphragm 130 is provided with a first stepped hole 131 and a second stepped hole 132, and a compression chamber 111 is formed between the diaphragm 130 and the first port for the compression chamber 111. The smaller-diameter ends of the first stepped hole 131 and the second stepped hole 132 communicate with the compression chamber 111, that is, the smaller-diameter ends of the first stepped hole 131 and the second stepped hole 132 are disposed close to the first port. The first check valve 310 is installed at the larger diameter end of the first stepped hole 131, and the second check valve 320 is installed at the larger diameter end of the second stepped hole 132. First check valve 310 allows fluid to flow only from first passage 210 to compression chamber 111 and second check valve 320 allows fluid to flow only from compression chamber 111 to second passage 220.

Referring to fig. 3-5, optionally, the piston rod 120 includes a sealing head 121, a rod body 122 and a force transmission head 123, where the sealing head 121 and the force transmission head 123 are respectively installed at two ends of the rod body 122, the outer diameter of the rod body 122 is smaller than the outer diameters of the sealing head 121 and the force transmission head 123, the sealing head 121 is slidably disposed in the compression cavity 111, and the sealing head 121 is in dynamic sealing fit with the inner wall of the compression cavity 111, that is, the sealing performance can be ensured when the sealing head 121 slides relative to the compression cavity 111. And rod 122 is spaced from the inner wall of compression chamber 111 to reduce friction. The sealing head 121 can be moved away from the compression chamber 111 from the first port to effect disassembly of the piston rod 120 and the pump body 110.

Further, the piston pump 100 further includes an elastic body 140, and the elastic body 140 may be a spring, a shrapnel, or the like. For example, in the present embodiment, the elastic body 140 is taken as an example of a spring. The elastic body 140 is sleeved outside the rod body 122, the elastic body 140 is located between the sealing head 121 and the force transmission head 123, one end of the elastic body 140 can be abutted against the end face, close to the sealing head 121, of the force transmission head 123, after the elastic body 140 and the piston rod 120 are inserted into the compression cavity 111 together, the other end of the elastic body 140 can be abutted against the inner wall of the compression cavity 111, and therefore, after the length of the piston rod 120 inserted into the compression cavity 111 is increased, the elastic body 140 is compressed, the elastic body 140 has an extending elastic force, and the piston rod 120 can be driven to extend out of the compression cavity 111. Optionally, a stop lever is provided in compression chamber 111, against which the end of elastic body 140 remote from force transmission head 123 can abut, limiting the position of elastic body 140, so that elastic body 140 can be compressed when piston rod 120 is inserted into compression chamber 111. Through setting up elastomer 140, after drive head 400 drive piston rod 120 inserts compression chamber 111, drive head 400 does not need to exert the force that drives piston rod 120 and pull out compression chamber 111 again, and the force that piston rod 120 stretches out compression chamber 111 provides through elastomer 140, so, can press piston rod 120 when drive head 400 rotates can, need not design drive head 400 draw the structure of dragging piston rod 120, has simplified the structure, the dismouting of being convenient for.

It should be noted that the pump bodies 110 of the plurality of piston pumps 100 may be provided as a unitary structure, or portions of the plurality of pump bodies 110 may be integrated together to form the substrate 150. For example, in the present embodiment, the portions of the plurality of pump bodies 110 near the second ports are integrated together to form the circular base plate 150, and the second ports all extend to the plate surface of the base plate 150 far from the piston rod 120. The outer circumferential surface of the base plate 150 is provided with external threads, and the plate surface of the base plate 150 remote from the piston rod 120 is provided with a first annular groove 151 and a second annular groove 152. The first annular groove 151 is internally provided with a first sealing ring 160, the second annular groove 152 is internally provided with a second sealing ring 170, wherein four second one-way valves 320 in the four valve assemblies 300 are all positioned in an area surrounded by the first sealing ring 160, and four first one-way valves 310 in the four valve assemblies 300 are all positioned in an area surrounded by the first sealing ring 160 and the second sealing ring 170.

Referring to fig. 7, in the present embodiment, the end cap 200 may alternatively have a first collecting groove 230 and a second collecting groove 240, where the first collecting groove 230 is provided as an annular groove and the second collecting groove 240 is provided as a circular groove. Specifically, first collection trough 230 communicates with first channel 210 and second collection trough 240 communicates with second channel 220, with first collection trough 230 disposed about second collection trough 240. The end cover 200 is further provided with an internal thread, a part of the end cover 200 is sleeved outside the base plate 150, the internal thread of the end cover 200 is in threaded connection with the external thread on the base plate 150, and the plate surface of the base plate 150 far away from the piston rod 120 seals the notch of the first collecting groove 230 and the notch of the second collecting groove 240. Meanwhile, after the end cover 200 is connected with the base plate 150, the first sealing ring 160 and the second sealing ring 170 are clamped between the end cover 200 and the base plate 150, the first collecting groove 230 is located between the first sealing ring 160 and the second sealing ring 170, the second collecting groove 240 is located in an area surrounded by the second sealing ring 170, the first sealing ring 160 and the second sealing ring 170 cooperate to seal and block the first collecting groove 230 and the second collecting groove 240, four first check valves 310 can be communicated with the first channel 210 through the first collecting groove 230, and four second check valves 320 can be communicated with the second channel 220 through the second collecting groove 240.

Referring to fig. 8, in this embodiment, optionally, the medical pump further includes a base 500, the base 500 is provided with a guide hole 510, one ends of the first ports of the pump bodies 110 are inserted into the guide hole 510, and the pump bodies 110 are detachably connected with the base 500, that is, the pump bodies 110 can be pulled out of the guide hole 510. The driving head 400 is inserted into the guiding hole 510, the driving head 400 is rotatably matched with the base 500, and the driving head 400 can be pulled out from the guiding hole 510. Further, the base 500 is further provided with a fixing hole, so that a bolt can be inserted into the fixing hole, and the base 500 is fixedly connected with other equipment through the bolt.

Referring to fig. 9, in this embodiment, alternatively, the driving head 400 includes a connection plate 410, a driving rod 420, and a transmission rod 430. The driving rod 420 and the transmission rod 430 are fixedly connected with the connecting plate 410, the driving rod 420 and the transmission rod 430 are coaxially arranged, namely, the axes of the driving rod 420 and the transmission rod 430 are preset axes, the connecting plate 410 is a circular plate, and the axes of the connecting plate 410 are coincident with the preset axes. The driving rod 420 is used for driving the piston rod 120 to stretch and retract, and the transmission rod 430 is used for being matched with a motor. Thus, when the motor is started, the transmission rod 430 is driven to rotate, the transmission rod 430 transmits torque to the driving rod 420 through the connecting plate 410, and the driving rod 420 drives the piston rod 120 to move.

Referring to fig. 9, alternatively, the drive rod 420 may be a hollow rod, with the drive rod 420 having a drive face 431 remote from the web 410. In one embodiment, the driving surface 431 may be provided as a wave surface extending in the circumferential direction of the preset axis, which wave surface abuts the piston rod 120. When the position of the wave surface abutting against the piston rod 120 moves from the wave trough 4312 to the wave crest 4311, the wave surface drives the piston rod 120 to move in the direction of inserting into the compression chamber 111; when the position of the wavy surface abutting against the piston rod 120 moves from the crest 4311 to the trough 4312, the elastic body 140 drives the piston rod 120 to extend out of the compression chamber 111. It should be understood that when the number of the piston rods 120 is four, and the two piston rods 120 are in a group, the wave surface has two peaks 4311 and two valleys 4312, and when the two peaks 4311 are respectively abutted with the two piston rods 120 of the first group, the two valleys 4312 are respectively abutted with the two piston rods 120 of the second group.

Referring to fig. 10, in another embodiment, the driving surface 431 is configured as a bevel, which may be formed by cutting the driving rod 420 in a direction having an included angle with the preset axis, and the bevel is simultaneously abutted against the plurality of piston rods 120 of the plurality of piston pumps 100, and when the driving head 400 rotates, the plurality of piston rods 120 achieve continuous operation, at this time, the plurality of piston rods 120 all act independently, and the stroke sequentially changes. That is, when the end portions of the plurality of piston rods 120 are abutted against the inclined surface, the length of each piston rod 120 extending out of the pump body 110 is not uniform, and when the inclined surface rotates, the plurality of piston rods 120 sequentially perform telescopic actions, so that continuous liquid conveying is realized.

It should be appreciated that, since the driving surface 431 is in surface contact with the end of the piston rod 120 and provides the restoring force through the elastic body 140, a clamping or grabbing mechanism is not required between the driving surface 431 and the piston rod 120 to drive the piston rod 120 to extend out of the pump body 110, so that the installation and the disassembly of the piston pump 100 are facilitated; meanwhile, a clamping or grabbing mechanism is omitted, a control mode is simplified, and the stability of the whole system is improved.

In this embodiment, the medical pump adopts a plurality of independent parts concatenation to obtain, and when the medical pump washs, can split into a plurality of independent parts and wash respectively, the inside dead angle that also is difficult for exists of pump body 110, and the medical pump washs conveniently, and the cleaning performance is good, can repetitious usage, and difficult jam, use cost is low.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. A medical pump, comprising:

the piston pump comprises a pump body and a piston rod, wherein the pump body is provided with a compression cavity, and the piston rod is slidably inserted into the compression cavity; the end cover is provided with a first channel and a second channel which are mutually independent, and the end cover is detachably connected with the piston pump; the valve assembly comprises a first one-way valve and a second one-way valve which are opposite in conducting direction, the first one-way valve and the second one-way valve are both detachably connected with the compression cavity, the first one-way valve is used for conducting the first channel and the compression cavity when the volume of the compression cavity is increased, and the second one-way valve is used for conducting the second channel and the compression cavity when the volume of the compression cavity is reduced; the driving head is detachably connected with the pump body and is used for rotating around a preset axis so as to drive the piston rod to slide back and forth in the extending direction of the preset axis, and therefore the volume of the compression cavity is adjusted.

2. The medical pump of claim 1, wherein:

the piston pump further comprises an elastomer connected to both the pump body and the piston rod for imparting a movement tendency to the piston rod out of the pump body.

3. The medical pump of claim 2, wherein:

the driving head is provided with a first driving surface which is a wave surface extending in the circumferential direction of a preset axis, and the wave surface is abutted with the piston rod; when the position of the wave surface abutting against the piston rod moves from the trough to the crest, the wave surface drives the piston rod to move along the direction of inserting the piston rod into the compression cavity; when the position of the wavy surface abutting against the piston rod moves from the crest to the trough, the elastic body drives the piston rod to extend out of the compression cavity.

4. The medical pump of claim 2, wherein:

the driving head is provided with a second driving surface which is an inclined surface, and the inclined surface is abutted with the piston rod; when the position of the inclined surface abutting against the piston rod moves from the high side far away from the piston rod to the low side close to the piston rod, the inclined surface drives the piston rod to move along the direction of inserting the compression cavity; when the position of the inclined surface abutting against the piston rod moves from the low side to the high side, the elastic body drives the piston rod to extend out of the compression cavity.

5. The medical pump of claim 1, wherein:

the medical pump further comprises a base, the base is provided with a guide hole, the pump body is inserted into the guide hole, and the pump body is detachably connected with the base; the driving head is inserted into the guide hole and is matched with the base in a rotatable mode.

6. The medical pump of claim 1, wherein:

the number of the piston pumps is multiple, the number of the valve assemblies is multiple correspondingly, and the valve assemblies are respectively matched with the piston pumps in a one-to-one correspondence manner; the first check valves of the valve assemblies are used for conducting the first channel and the compression cavity when the volume of the compression cavity is increased, and the second check valves of the valve assemblies are used for conducting the second channel and the compression cavity when the volume of the compression cavity is reduced; the driving head is matched with a plurality of piston rods of a plurality of piston pumps at the same time and is used for driving a plurality of piston rods to move in the extending direction of a preset axis, and the moving directions of at least two piston rods in the plurality of piston rods are opposite.

7. The medical pump of claim 6, wherein:

the end cover is provided with a first collecting groove and a second collecting groove, the first collecting groove is communicated with the first channel, the first collecting groove is arranged around the second collecting groove, and the second collecting groove is communicated with the second channel; the pump body encloses the notches of the first and second sink tanks.

8. The medical pump of claim 7, wherein:

the end cover with be provided with first sealing washer and second sealing washer between the pump body, first collection groove is located between first sealing washer and the second sealing washer, the second is collected the groove and is located the region that the first sealing encloses.

9. The medical pump of claim 1, wherein:

the end cover is in threaded connection with the pump body.

10. The medical pump of claim 1, wherein:

the driving head comprises a connecting plate, a driving rod and a transmission rod, wherein the driving rod and the transmission rod are fixedly connected with the connecting plate, and the driving rod is used for driving the piston rod to stretch; the transmission rod is used for being matched with the motor.