CN210433782U

CN210433782U - Liquid pump

Info

Publication number: CN210433782U
Application number: CN201920737543.XU
Authority: CN
Inventors: 佘卫平
Original assignee: Dongguan Maihua Electronic Technology Co ltd
Current assignee: Dongguan Maihua Electronic Technology Co ltd
Priority date: 2019-05-21
Filing date: 2019-05-21
Publication date: 2020-05-01
Anticipated expiration: 2029-05-21

Abstract

The utility model provides a liquid pump, which comprises a liquid collecting bottle, a sealing cover, a manual air extractor, an air pressure sensor, an overpressure and air leakage preventing locking device, a control circuit device, a power supply device and a liquid pumping assembly, wherein the sealing cover is sealed at the top of the liquid collecting bottle, and the sealing cover and the liquid collecting bottle form a sealed liquid collecting cavity; the manual air extractor is arranged on the liquid collection bottle and the sealing cover, is communicated with the liquid collection cavity, and is operated to extract the gas in the liquid collection cavity to the outside; the air pressure sensor extends into the liquid collection cavity, and when the air pressure sensor detects that the air pressure in the liquid collection cavity reaches a preset air pressure value, the overpressure and air leakage prevention locking device connects the air exhaust end of the manual air exhaust device to the outside and locks the manual air exhaust device; the control circuit device is electrically connected to the overvoltage and air leakage prevention locking device and the air pressure sensor; the power supply device is arranged on the sealing cover and is electrically connected with the control circuit device; the liquid pumping component is detachably communicated with the liquid collecting cavity.

Description

Liquid pump

Technical Field

The utility model relates to the field of medical equipment, especially, relate to a drawing liquid pump.

Background

To the processing of the wound after the surgery, can produce the hydrops often in the wound, the hydrops that produces need in time be pumped out to ensure the wound normal healing.

At present, the hydrops that produces in the suction wound usually accomplish through outside drawing liquid equipment, but present drawing liquid equipment often the structure all is more complicated, and is bulky, and manufacturing cost is high, and the operation is also very loaded down with trivial details complicacy, can't control the atmospheric pressure value of drawing liquid, drawing liquid speed and drawing liquid volume, and the use compensation negative pressure is also very loaded down with trivial details complicacy, uses very inconveniently, and has the safety risk.

Therefore, there is a need for an infusion pump that overcomes the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a liquid pump, this liquid pump have simple structure, small, low in manufacturing cost, easy and simple to handle and can carry out the advantage controlled to atmospheric pressure value, drawing liquid speed and drawing liquid volume.

In order to achieve the above object, the utility model provides an infusion pump, include:

a liquid collecting bottle;

the sealing cover is sealed at the top of the liquid collecting bottle, and a sealed liquid collecting cavity is formed by the sealing cover and the liquid collecting bottle;

the manual air extractor is arranged on the liquid collecting bottle and the sealing cover, is communicated with the liquid collecting cavity, and is operated to extract the gas in the liquid collecting cavity to the outside;

the air pressure sensor extends into the liquid collection cavity;

when the air pressure sensor detects that a preset air pressure value is reached in the liquid collection cavity, the overpressure and air leakage preventing locking device connects the air exhaust end of the air exhaust device to the outside and locks the manual air exhaust device;

the control circuit device is electrically connected to the overvoltage and air leakage prevention locking device and the air pressure sensor;

the power supply device is arranged on the sealing cover and is electrically connected to the control circuit device; and

the liquid pumping assembly is detachably communicated with the liquid collecting cavity.

Preferably, an air exhaust tube body which is isolated from the liquid collecting cavity and is vertically arranged is formed in the liquid collecting bottle, the upper end of the air exhaust tube body is sealed on the sealing cover, and the lower end of the air exhaust tube body is provided with an air vent communicated with the outside;

the manual air pumping device comprises a pressing rod, a piston, a first sealing ring and a first elastic piece, the pressing rod penetrates through the sealing cover in a sealed and sliding mode along the vertical direction, and the piston slides in the air pumping pipe body; the piston is fixed at the lower end of the pressing rod and is provided with an annular mounting groove, and the first sealing ring is movably sleeved in the annular mounting groove; a first exhaust notch is formed in the upper wall of the annular mounting groove, and the depth of the first exhaust notch is smaller than or equal to the radius of the first sealing ring; a second exhaust notch is formed in the lower wall of the annular mounting groove, and the depth of the second exhaust notch is larger than the diameter of the first sealing ring; when the piston moves upwards, the first sealing ring is far away from the first exhaust notch; when the piston moves downwards, the first sealing ring blocks the first exhaust notch; the first elastic piece is compressed and abutted between the piston and the bottom of the air exhaust pipe body.

Preferably, the liquid pump further comprises a middle cover, the middle cover is fixed on the upper side of the sealing cover, an air exhaust communicating groove body is formed on the sealing cover, and the middle cover is sealed in a notch of the air exhaust communicating groove body; the bottom of the air exhaust communicating groove body is provided with an air inlet communicated with the liquid collecting cavity and an air outlet communicated with the air exhaust pipe body, the air inlet is provided with an air inlet check valve assembly, and the air inlet check valve assembly allows air in the liquid collecting cavity to flow into the air exhaust communicating groove body in a one-way mode.

Preferably, the air inlet check valve assembly comprises an air inlet valve seat, a second sealing ring and a closed ball, the air inlet valve seat is fixed between the bottom of the air exhaust communication tank body and the middle cover, an air inlet channel communicated with the air inlet is formed in the air inlet valve seat, an annular groove is formed in the air inlet channel, the second sealing ring is fixed in the annular groove, the closed ball is movably placed on the second sealing ring, and a vent groove communicated between the air inlet channel and the air exhaust communication tank body is formed in the top of the air inlet valve seat.

Preferably, the middle cover is provided with an air release hole communicated with the air exhaust communication groove body, the overpressure-preventing air release locking device comprises an air release component, a motor, a transmission component, a driving wheel and a sliding abutting seat, the air release component is arranged in the air exhaust communication groove body, and the air release component can selectively block or open the air release hole; the motor is fixed on the sealing cover and is electrically connected with the control circuit device; the driving wheel is pivoted on the sealing cover around a vertical axial lead, the transmission assembly is connected between the output end of the motor and the driving wheel in a transmission manner, the sliding abutting seat horizontally slides on the upper side of the middle cover, a long driving groove perpendicular to the sliding direction of the sliding abutting seat is formed in the sliding abutting seat, a driving column deviating from the axial lead of the driving wheel vertically extends upwards and is vertically slid in the long driving groove; when the sliding abutting seat slides to a position right above the air release hole and abuts against the air release assembly, the air release assembly opens the air release hole; when the sliding abutting seat is far away from the air leakage hole, the air leakage assembly blocks the air leakage hole.

Preferably, the transmission assembly comprises a worm and a first gear, a second gear, a third gear and a fourth gear which are vertically pivoted on the upper side of the sealing cover, the second gear is provided with a first upper gear and a first lower gear which have the same axial line, and the diameter of the first upper gear is larger than that of the first lower gear; the third gear is provided with a second upper gear and a second lower gear which have the same axis, and the diameter of the second upper gear is smaller than that of the second lower gear; the worm is fixed at the output end of the motor, the worm is meshed with the first gear, the first gear is meshed with the first upper gear, the first lower gear is meshed with the second lower gear, the second upper gear is meshed with the fourth gear, the driving wheel is fixed on the fourth gear, and the driving wheel and the fourth gear have the same axial lead.

Preferably, the air-release assembly comprises a second elastic part, a blocking block and a third sealing ring, an air-release mounting seat located right below the air-release hole is formed in the air-exhaust communicating groove, the blocking block vertically slides on the air-release mounting seat, the second elastic part is pressed and abutted between the air-release mounting seat and the blocking block, the top of the blocking block vertically extends upwards to form a convex column, the convex column penetrates through the air-release hole in a gap manner and extends out of the air-release hole, and the third sealing ring is sleeved at the bottom of the convex column; the sliding abutting seat slides to a position right above the air leakage hole to abut against the convex column to move downwards, and the blocking block and the third sealing ring are separated from the air leakage hole; when sliding the abutting seat to keep away from in the hole of disappointing, second elastic component orders about the shutoff piece reaches third sealing washer rebound is stopped up the hole of disappointing.

Preferably, prevent that mistake locking device is leaked in excessive pressure still contains the locking subassembly, the locking subassembly contains to slide and blocks piece and third elastic component, the slip blocks the piece and follows the slip direction that slides to touch the seat slide in on the slip touches the seat, the third elastic component be compressed butt in the slip touch the seat with slide and block between the piece, set up the confession on the pressure pole the slip blocks the recess that blocks of piece block, press the pole income when in the exhaust tube, block the recess just right the slip blocks the piece.

Preferably, the liquid pump further comprises a top cover, the top cover is fixed on the sealing cover, an installation cavity is formed between the top cover and the sealing cover, and the middle cover is located in the installation cavity;

the manual air extractor also comprises a pressing cap, the pressing cap is fixed at the upper end of the pressing rod, and the pressing cap is positioned above the top cover;

a liquid pumping channel communicated with the liquid collecting cavity is formed on the sealing cover, a one-way valve plate is arranged at the lower end of the liquid pumping channel, a connecting channel is formed on the top cover, the lower end of the connecting channel is communicated with the upper end of the liquid pumping channel, and a horizontally extending inserting port is formed at the upper end of the connecting channel;

the liquid pumping assembly comprises a plug connector, a fourth sealing ring, a liquid pumping pipe and a sucker, the plug connector is provided with a connecting end and an inserting end, the liquid pumping pipe is communicated between the connecting end and the sucker, the fourth sealing ring is sleeved on the inserting end, a locking groove is further formed in the inserting end, the inserting end is inserted in the inserting port, and the fourth sealing ring is sealed between the inner wall of the inserting port and the outer wall of the inserting end;

the liquid pump also comprises a quick-connection locking piece and a fourth elastic piece, wherein the quick-connection locking piece vertically slides on at least one of the sealing cover, the middle cover and the top cover, and the fourth elastic piece is compressed and abutted between the upper side of the middle cover and the bottom of the quick-connection locking piece; one end of the quick-connection locking piece vertically extends upwards to form a pressing operation part, and the pressing operation part penetrates upwards and extends out of the top cover; the other end of the quick-connection locking piece vertically extends upwards to form a locking portion, and the locking portion can be detachably clamped in the locking groove.

Preferably, the liquid pump further comprises a full liquid pouring detection assembly, wherein the full liquid pouring detection assembly comprises a first top detection column, a second top detection column, a first bottom detection column and a second bottom detection column, the first top detection column, the second top detection column, the first bottom detection column and the second bottom detection column are fixed on the sealing cover along the vertical direction, the first top detection column and the second top detection column extend into the top of the liquid collection cavity to a preset position, and the first bottom detection column and the second bottom detection column extend into the bottom of the liquid collection cavity to a preset position; the first bottom detection column is positioned at the upper left of the liquid collection cavity, and the second bottom detection column is positioned at the upper right of the liquid collection cavity; the air exhaust pipe body is positioned in the middle of the liquid collecting cavity, the first bottom detection column is positioned on the left side of the air exhaust pipe, and the second bottom detection column is positioned on the right side of the air exhaust pipe; the first top detection column, the second top detection column, the first bottom detection column and the second bottom detection column are electrically connected to the control circuit device.

Because the sealing cover of the liquid pump of the utility model is sealed at the top of the liquid collecting bottle, the sealing cover and the liquid collecting bottle form a sealed liquid collecting cavity; the manual air extractor is arranged on the liquid collection bottle and the sealing cover, is communicated with the liquid collection cavity, and is operated to extract the gas in the liquid collection cavity to the outside; the air pressure sensor extends into the liquid collection cavity, and when the air pressure sensor detects that the air pressure in the liquid collection cavity reaches a preset air pressure value, the overpressure and air leakage prevention locking device connects the air exhaust end of the manual air exhaust device to the outside and locks the manual air exhaust device; the control circuit device is electrically connected to the overvoltage and air leakage prevention locking device and the air pressure sensor; the power supply device is arranged on the sealing cover and is electrically connected with the control circuit device; the liquid pumping component is detachably communicated with the liquid collecting cavity. Then inhale the subsides on the wound with the drawing liquid subassembly, the gas through operating manual air exhaust device in with album liquid intracavity extracts the external world, air pressure sensor detects when an album liquid intracavity reaches preset atmospheric pressure value, air pressure sensor will feed back to control circuit device, then control circuit device can control and prevent that the end of bleeding of excessive pressure losing air locking device with manual air exhaust device communicates in the external world and locks manual air exhaust device, the negative pressure of formation negative pressure in album liquid intracavity and avoiding album liquid intracavity is crossed lowly, and simultaneously, the negative pressure that the collection intracavity formed can enter into album liquid intracavity through the hydrops suction that the drawing liquid subassembly produced in with the wound. And different drawing liquid speed and drawing liquid volume can be realized to the atmospheric pressure value of predetermineeing of difference, can come the convenient negative pressure of compensation collection liquid intracavity through operating manual air exhaust device according to the user demand of reality in the use, have simple structure, small, low in manufacturing cost, easy and simple to handle and can carry out the advantage controlled to atmospheric pressure value, drawing liquid speed and drawing liquid volume in the collection liquid intracavity, it is very convenient to use, avoids appearing the safety risk.

Drawings

Fig. 1 is a perspective view of the liquid pump according to the present invention.

Fig. 2 is an exploded view of fig. 1.

Fig. 3 is a top view of fig. 1.

Fig. 4 is a sectional view taken along line a-a of fig. 3.

Fig. 5 is a sectional view taken along line B-B of fig. 3.

Fig. 6 is an enlarged view of a portion C in fig. 5.

Fig. 7 is a perspective view illustrating the combination of the piston and the first seal ring of the liquid pump according to the present invention.

Fig. 8 is the combined three-dimensional schematic view of the liquid collecting bottle, the sealing cover, the air leakage component, the motor, the transmission component, the driving wheel and the air inlet check valve component of the liquid pump.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and preferred embodiments, but the embodiments of the invention are not limited thereto.

Referring to fig. 1 to 5, the liquid pump 100 of the present invention includes a liquid collecting bottle 10a, a sealing cover 10b, a manual air extractor 20, an air pressure sensor (not shown), an overpressure-proof air release locking device 30, a control circuit device 80a, a power supply device 90 and a liquid extracting assembly 40, wherein the sealing cover 10b is sealed at the top of the liquid collecting bottle 10a, the sealing cover 10b and the liquid collecting bottle 10a form a sealed liquid collecting cavity 11, and the liquid collecting cavity 11 is used for storing the effusion sucked from the wound. The manual air extractor 20 is arranged on the liquid collecting bottle 10a and the sealing cover 10b, the manual air extractor 20 is communicated with the liquid collecting cavity 11, and the manual air extractor 20 is operated to extract the gas in the liquid collecting cavity 11 to the outside, so that negative pressure is formed in the liquid collecting cavity 11; the air pressure sensor extends into the liquid collecting cavity 11, and when the air pressure sensor detects that the pressure in the liquid collecting cavity 11 reaches a preset air pressure value, the overpressure and air leakage preventing locking device 30 communicates the air suction end of the manual air suction device 20 with the outside and locks the manual air suction device 20; the control circuit device 80a is electrically connected to the over-pressure and air-leakage prevention locking device 30 and the air pressure sensor; the power supply device 90 is arranged on the sealing cover 10b, and the power supply device 90 is electrically connected to the control circuit device 80 a; the liquid drawing assembly 40 is detachably communicated with the liquid collecting cavity 11. Then inhale and paste drawing liquid subassembly 40 on the wound, the external world is taken out with the gaseous of collecting the liquid chamber 11 through operation manual air exhaust device 20, when baroceptor detected and reached preset atmospheric pressure value in the liquid chamber 11, baroceptor will feed back to control circuit device 80a, then control circuit device 80a can control and prevent that the bleed end of excessive pressure is lost heart locking device 30 with manual air exhaust device 20 communicates in the external world and locks manual air exhaust device 20, form the negative pressure in collecting the liquid chamber 11 and avoid the negative pressure in collecting the liquid chamber 11 to hang down, and simultaneously, the negative pressure that forms in the liquid chamber 11 can enter into collecting the liquid chamber 11 through the hydrops suction that drawing liquid subassembly 40 produced in with the wound in. And different drawing liquid speed and drawing liquid volume can be realized to the atmospheric pressure value of predetermineeing of difference, can come the convenient negative pressure in the compensation collection liquid chamber 11 through operating manual air exhaust device 20 according to the user demand of reality in the use, have simple structure, small, low in manufacturing cost, easy and simple to handle and can carry out the advantage controlled to atmospheric pressure value, drawing liquid speed and drawing liquid volume in the collection liquid chamber 11, it is very convenient to use, avoid appearing the safety risk.

Referring to fig. 4 and 7, an air pumping tube 12 isolated from the liquid collecting chamber 11 and vertically arranged is formed in the liquid collecting bottle 10a, an upper end of the air pumping tube 12 is sealed on the sealing cover 10b, and a lower end of the air pumping tube 12 is opened with an air vent 121 communicated with the outside. The first filter 122 is disposed below the vent hole 121 to prevent external impurities from entering the exhaust pipe 12, and the first filter 122 is preferably a sponge in this embodiment, but not limited thereto. The manual air extractor 20 includes a pressing rod 21, a piston 22, a first sealing ring 23 and a first elastic member 24, wherein the pressing rod 21 is slidably inserted into the sealing cap 10b in a vertical direction, and the piston 22 is slidably disposed in the air extractor 12. The piston 22 is fixed at the lower end of the pressing rod 21, an annular mounting groove 221 is formed on the piston 22, and the first sealing ring 23 is movably sleeved in the annular mounting groove 221; a first exhaust notch 222 is formed in the upper wall of the annular mounting groove 221, and the depth of the first exhaust notch 222 is smaller than or equal to the radius of the first sealing ring 23; the lower wall of the annular mounting groove 221 is provided with a second exhaust notch 223, and the depth of the second exhaust notch 223 is greater than the diameter of the first sealing ring 23; when the piston 22 moves upward, the first sealing ring 23 is away from the first exhaust notch 222, and at this time, the first exhaust notch 222, the annular mounting groove 221, the second exhaust notch 223 and the vent hole 121 are communicated with each other, so that the gas between the upper end of the exhaust pipe body 12 and the piston 22 is exhausted to the outside through the first exhaust notch 222, the annular mounting groove 221, the second exhaust notch 223 and the vent hole 121 in sequence. When the piston 22 moves downward, the first sealing ring 23 blocks the first exhaust gap 222, so that the air in the liquid collecting chamber 11 can be pumped out to a position between the upper end of the exhaust pipe body 12 and the piston 22, and when the piston 22 moves upward, the air can be continuously exhausted to the outside. The first elastic member 24 is preferably a spring, the first elastic member 24 is compressed and abutted between the piston 22 and the bottom of the air exhaust tube 12, and the piston 22 can be driven to automatically reset upwards by the elastic force of the first elastic member 24, so that the air exhaust operation is more labor-saving and convenient.

Referring to fig. 2, 5, 6 and 8, the liquid pump 100 of the present invention further includes a middle cover 10c, the middle cover 10c is fixed on the upper side of the sealing cover 10b, the sealing cover 10b is formed with a suction communicating groove 13, and the middle cover 10c is sealed in the groove opening of the suction communicating groove 13. The bottom of the air-extracting communicating groove body 13 is provided with an air inlet 131 communicated with the liquid collecting cavity 11 and an air outlet 132 communicated with the air-extracting tube body 12, and the air in the liquid collecting cavity 11 can enter the air-extracting communicating groove body 13 through the air inlet 131 and then enter the air-extracting tube body 12 through the air outlet 132. The air inlet 131 is provided with an air inlet check valve assembly 50, the air inlet check valve assembly 50 allows air in the liquid collecting cavity 11 to flow into the air suction communicating groove body 13 in a one-way mode, so that the air in the liquid collecting cavity 11 can only enter the air suction communicating groove body 13 through the air inlet 131, and the air in the air suction communicating groove body 13 cannot enter the liquid collecting cavity 11, so that negative pressure leakage in the liquid collecting cavity 11 is prevented. More preferably, in this embodiment, a second filter 134 is further disposed at the air inlet 131 at the top of the liquid collecting chamber 11, and the second filter 134 is preferably a sponge to ensure the cleanliness of the air entering the air-extracting communicating groove 13 from the liquid collecting chamber 11.

Referring to fig. 5 and 6, specifically, the air inlet check valve assembly 50 includes an air inlet valve seat 51, a second sealing ring 53 and a sealing ball 52, the air inlet valve seat 51 is fixed between the bottom of the air suction communicating tank 13 and the middle cover 10c, an air inlet passage 511 communicating with the air inlet 131 is formed on the air inlet valve seat 51, an annular groove 512 is formed in the air inlet passage 511, and the second sealing ring 53 is fixed in the annular groove 512. The closed sphere 52 is a metal sphere, the closed sphere 52 is movably placed on the second sealing ring 53, and the top of the intake valve seat 51 is provided with a vent groove 513 which is communicated between the intake passage 511 and the suction communicating groove body 13. When the piston 22 moves downwards, the air pressure in the liquid collecting cavity 11 is higher than the air pressure of the air suction communicating groove body 13, so that the sealed ball 52 is separated from the second sealing ring 53, and the air in the liquid collecting cavity 11 can be sucked out. When the piston 22 moves upwards, the air pressure in the liquid collecting cavity 11 is lower than the air pressure of the air suction communicating groove body 13, so that the sealed ball 52 is sealed in the second sealing ring 53, and the air in the air suction communicating groove body 13 cannot enter the liquid collecting cavity 11. Thereby realizing the structure that the air inlet check valve component 50 allows the air in the liquid collecting cavity 11 to flow into the air exhaust communication groove body 13 in a single direction.

Referring to fig. 2, 4, 5, 6 and 8, the middle cover 10c is provided with an air release hole 15 communicated with the air suction communicating groove 13, the overpressure-preventing air release locking device 30 comprises an air release assembly 31, a motor 32, a transmission assembly 33, a driving wheel 34 and a sliding abutting seat 35, the air release assembly 31 is arranged in the air suction communicating groove 13, and the air release assembly 31 can selectively block or open the air release hole 15; the motor 32 is fixed on the sealing cover 10b, and the motor 32 is electrically connected to the control circuit device 80 a; the driving wheel 34 is pivoted on the sealing cover 10b around a vertical axis, the transmission assembly 33 is connected between the output end of the motor 32 and the driving wheel 34 in a transmission manner, the sliding contact seat 35 horizontally slides on the upper side of the middle cover 10c, a long driving groove 351 perpendicular to the sliding direction of the sliding contact seat 35 is formed in the sliding contact seat 35, a driving column 341 deviating from the axis of the driving wheel 34 vertically extends upwards from the driving wheel 34, and the driving column 341 vertically slides in the long driving groove 351; when the sliding abutting seat 35 slides to the position right above the air release hole 15 and abuts against the air release component 31, the air release component 31 opens the air release hole 15; when the sliding abutting seat 35 is far away from the air release hole 15, the air release assembly 31 blocks the air release hole 15. When the air pressure sensor detects that the air pressure value in the liquid collecting cavity 11 reaches a preset air pressure value, the air pressure sensor feeds back the air pressure value to the control circuit device 80a, the control circuit device 80a can control the motor 32 to rotate, and drive the driving wheel 34 through the transmission component 33, the rotating driving wheel 34 drives the driving column 341 to drive the sliding abutting seat 35 to slide to the position right above the air leakage hole 15 to abut against the air leakage component 31, so that the air leakage component 31 opens the air leakage hole 15, the air suction communicating groove body 13 and the air suction pipe body 12 are both communicated with the outside, and even if the manual air suction device 20 is continuously operated, the air in the liquid collecting cavity 11 cannot be sucked. When the pressure sensor detects that the pressure in the liquid collecting cavity 11 is lower than a preset pressure value, the pressure sensor feeds back the pressure to the control circuit device 80a, the control circuit device 80a can control the motor 32 to continue rotating, and drive the driving wheel 34 through the transmission component 33, the rotating driving wheel 34 drives the driving column 341 to drive the sliding abutting seat 35 to be away from the air leakage hole 15, the air leakage component 31 can block the air leakage hole 15, the air suction communicating groove body 13 and the air suction pipe body 12 are both isolated from the outside, and the manual air suction device 20 can be continuously operated to suck the gas in the liquid collecting cavity 11 to compensate the negative pressure in the liquid collecting cavity 11.

Referring to fig. 2, 4 and 8, the transmission assembly 33 includes a worm 331, and a first gear 332, a second gear (not labeled), a third gear 334 and a fourth gear 335 vertically pivoted on the upper side of the sealing cover 10b, wherein the second gear has a first upper gear 3331 and a first lower gear (not shown) with coaxial axes, and the diameter of the first upper gear is larger than that of the first lower gear; the third gear 334 has a second upper gear 3341 and a second lower gear 3342 which are coaxial with each other, and the diameter of the second upper gear 3341 is smaller than that of the second lower gear 3342; the worm 331 is fixed on the output end of the motor 32, the worm 331 is meshed with the first gear 332, the first gear 332 is meshed with the first upper gear, the first lower gear is meshed with the second lower gear 3342, the second upper gear 3341 is meshed with the fourth gear 335, the driving wheel 34 is fixed on the fourth gear 335, and the driving wheel 34 and the fourth gear 335 have the same axial lead. Thereby achieving a desired rotation change ratio of the motor 32 to the driving wheel 34 and allowing the driving wheel 34 to stably rotate.

Referring to fig. 2, 5, 6 and 8, the air release assembly 31 includes a second elastic member 311, a blocking block 312 and a third sealing ring 313, an air release mounting seat 133 located right below the air release hole 15 is formed in the air exhaust communicating groove 13, the blocking block 312 vertically slides on the air release mounting seat 133, and a gap or gap for air to flow is formed between the top of the air release mounting seat 133 and the middle cover 10 c. The second elastic element 311 is preferably a spring, but not limited thereto, the second elastic element 311 is pressed and abutted between the air release mounting seat 133 and the blocking block 312, the top of the blocking block 312 vertically extends upwards to form a convex column 3121, the convex column 3121 penetrates through the air release hole 15 in a gap, and the third sealing ring 313 is sleeved at the bottom of the convex column 3121; the sliding abutting seat 35 slides to the position right above the air release hole 15 to press the convex column 3121 to move downwards, and the blocking block 312 and the third sealing ring 313 are separated from the air release hole 15; when the sliding abutting seat 35 is far away from the air release hole 15, the second elastic member 311 drives the blocking block 312 and the third sealing ring 313 to move upward to block the air release hole 15. The blocking block 312 and the third sealing ring 313 can be driven to open the air leakage hole 15 or avoid the blocking block 312 and the third sealing ring 313 to block the air leakage hole 15 by sliding the abutting seat 35, so that the air exhaust communication groove body 13 and the air exhaust pipe body 12 are communicated or isolated from the outside, and the structure is simple and reasonable.

Referring to fig. 2, 4, 5 and 8, the over-pressure and air-leakage preventing locking device 30 further includes a locking component 36, the locking component 36 includes a sliding stopper 361 and a third elastic member 362, the sliding stopper 361 slides on the sliding contact seat 35 along the sliding direction of the sliding contact seat 35, the third elastic member 362 is preferably a spring, but not limited thereto, the third elastic member 362 is compressed and abuts between the sliding contact seat 35 and the sliding stopper 361, a blocking groove 211 for engaging the sliding stopper 361 is formed on the pressing rod 21, and when the pressing rod 21 is received in the air suction tube 12, the blocking groove 211 is opposite to the sliding stopper 361. When the air pressure sensor detects that the air pressure in the liquid collecting cavity 11 reaches a preset air pressure value, the air pressure sensor feeds back to the control circuit device 80a, the control circuit device 80a can control the motor 32 to rotate, the driving wheel 34 is driven by the transmission component 33, the driving column 341 is driven by the rotating driving wheel 34 to drive the sliding contact seat 35 to move towards the air release hole 15, when the sliding contact seat 35 slides to be directly above the air release hole 15 and presses against the convex column 3121 to move downwards, the blocking block 312 and the third sealing ring 313 are separated from the air release hole 15 to open the air hole, meanwhile, the sliding contact seat 35 synchronously slides the blocking block 361 to be close to the pressing rod 21, if the blocking groove 211 is not directly opposite to the sliding blocking block 361, the sliding blocking block 361 presses the pressing rod 21 elastically under the elastic force of the third elastic element 362 until the blocking groove 211 is directly opposite to the sliding blocking block 361, the sliding blocking block 361 can be blocked in the blocking groove 211 under the elastic force of the third elastic element 362, so as to prevent the pressing rod 21 from moving up and down, so that the air suction communicating groove body 13 and the air suction pipe body 12 are both communicated with the outside, and the pressing rod 21 is locked. When the pressure sensor detects that the pressure in the liquid collecting cavity 11 is lower than the preset pressure value, the pressure sensor feeds back the pressure to the control circuit device 80a, the control circuit device 80a can control the motor 32 to continue rotating, and drive the driving wheel 34 through the transmission component 33, the rotating driving wheel 34 drives the driving column 341 to drive the sliding abutting seat 35 to be away from the air release hole 15, the sliding abutting seat 35 synchronously drives the third elastic piece 362 and the sliding blocking block 361 to be separated from the blocking groove 211 to be away from the pressing rod 21, the blocking block 312 and the third sealing ring 313 can block the air release hole 15, so that the air suction communicating groove body 13 and the air suction pipe body 12 are both isolated from the outside, and the pressing rod 21 can be continuously operated to draw the air in the liquid collecting cavity 11 to compensate the negative pressure in the liquid collecting cavity 11.

Referring to fig. 1, fig. 2, fig. 3 and fig. 8, the liquid pump 100 of the present invention further includes a top cover 10d, the top cover 10d is fixed on the sealing cover 10b, an installation cavity 10f is formed between the top cover 10d and the sealing cover 10b, and the middle cover 10c is located in the installation cavity 10 f. In detail, in the present embodiment, the power supply device 90 includes a battery holder 91 and a battery 92, the battery holder 91 is disposed on the middle cover 10c and located in the mounting cavity 10f, that is, the battery holder 91 is disposed on the sealing cover 10b through the middle cover 10c, the battery 92 is detachably mounted on the battery holder 91, and the battery holder 91 is electrically connected to the control circuit device 80a to supply power to the internal electronic devices such as the control circuit device 80 a. The manual air extractor 20 further comprises a pressing cap 25, the pressing cap 25 is fixed on the upper end of the pressing rod 21, and the pressing cap 25 is located above the top cover 10d to facilitate the pressing and air extracting operation. The sealing cover 10b is formed with a liquid drawing channel 14 communicated with the liquid collecting cavity 11, the lower end of the liquid drawing channel 14 is provided with a one-way valve sheet (not shown), the top cover 10d is formed with a connecting channel 16, the lower end of the connecting channel 16 is communicated with the upper end of the liquid drawing channel 14, and the upper end of the connecting channel 16 is formed with a horizontally extending socket 17. The liquid pumping assembly 40 comprises a connection plug 41, a fourth sealing ring 42, a liquid pumping tube 43 and a suction cup 44, wherein the connection plug 41 has a connection end (not shown) and a connection end 412, the liquid pumping tube 43 is connected between the connection end and the suction cup 44, the fourth sealing ring 42 is sleeved on the connection end 412, and a locking groove 4121 is further formed on the connection end 412. The plug end 412 is plugged into the plug port 17, and the fourth sealing ring 42 is sealed between the plug port 17 and the plug end 412.

Moreover, the liquid pump 100 further includes a quick-connect locking element 60a and a fourth elastic element 60b, the quick-connect locking element 60a vertically slides on the sealing cover 10b, and certainly, in other embodiments, the quick-connect locking element 60a may also vertically slide on the middle cover 10c, or the top cover 10d, or the sealing cover 10b, the middle cover 10c and the top cover 10d, or any two of the sealing cover 10b, the middle cover 10c and the top cover 10d, so the details are not repeated herein. The fourth elastic member 60b is preferably a spring, but not limited thereto, and the fourth elastic member 60b is compressed and abutted between the upper side of the middle cover 10c and the bottom of the quick-connection locking member 60 a; one end of the quick-connection locking piece 60a vertically extends upwards to form a pressing operation part 61, and the pressing operation part 61 is upwards penetrated and extended out of the top cover 10d so as to facilitate the external pressing operation; the other end of the quick-connection locking piece 60a extends vertically upwards to form a locking part 62, the locking part 62 can be detachably clamped in the locking groove 4121, the insertion end 412 is inserted in the insertion port 17, and the fourth sealing ring 42 is sealed between the inner wall of the insertion port 17 and the outer wall of the insertion end 412. The plugging end 412 is plugged into the plugging port 17, and the quick-connect locking member 60a is driven to move upward under the elastic force of the fourth elastic member 60b, so that the locking portion 62 is engaged with the locking groove 4121, and the plugging end 412 of the plug 41 can be tightly locked in the plugging port 17. The connection plug 41 is communicated with the liquid collecting cavity 11. When the plugging end 412 needs to be detached from the plugging port 17, the pressing operation portion 61 protruding out of the top cover 10d is pressed, that is, the quick-connect locking member 60a is driven to move downward against the elastic force of the fourth elastic member 60b, so that the locking portion 62 is separated from the locking groove 4121, and the plugging head 41 can be pulled out of the plugging port 17, thereby completing the detachment operation of the liquid pumping assembly 40.

Please refer to fig. 2, fig. 4 and fig. 8, the utility model discloses a liquid pump 100 still includes that full liquid emptys the determine module (not mark in the figure), full liquid emptys the determine module and contains first top and detects post 71, the second top detects post 72, first bottom detects post 73 and second bottom and detects post 74, first top detects post 71, the second top detects post 72, first bottom detects on post 73 and second bottom detects post 74 and all is fixed in sealed lid 10b along vertical direction, first top detects post 71 and second top and detects the top that post 72 all stretched into album liquid chamber 11 to predetermineeing the position, optionally, first top detects post 71 and second top and detects the preset position that post 72 all stretched into album liquid chamber 11 top and be the full scale position of liquid in album liquid chamber 11. First bottom detects post 73 and second bottom and detects post 74 and all stretch into the bottom of collecting liquid chamber 11 to predetermineeing the position, and optionally, first bottom detects post 73 and second bottom and detects post 74 and all stretch into the position of predetermineeing of the bottom of collecting liquid chamber 11 and be the position that the bottom of first bottom detects post 73 and second bottom and detects post 74 is close to or contradicts in the bottom of collecting liquid chamber 11. Specifically, in this embodiment, the whole degree of depth of collecting liquid chamber 11 is 89.5mm, and the top distance of the full scale position of liquid in collecting liquid chamber 11 to collecting liquid chamber 11 is 13.5mm, and it is 13.5mm that the length that first top detects post 71 and second top detection post 72 stretched into collecting liquid chamber 11 promptly, and the bottom that first bottom detected post 73 and second bottom detection post 74 is 1.5mm to the distance of collecting liquid chamber 11 bottom to satisfy the demand that detects the position. Preferably, in the present embodiment, first bottom detection column 73 is located at the upper left of liquid collection chamber 11, and second bottom detection column 74 is located at the upper right of liquid collection chamber 11; the pumping pipe body 12 is located in the middle of the liquid collecting cavity 11, the first bottom detection column 73 is located on the left side of the pumping pipe, and the second bottom detection column 74 is located on the right side of the pumping pipe, so that the detection accuracy is guaranteed. The first top detection column 71, the second top detection column 72, the first bottom detection column 73 and the second bottom detection column 74 are electrically connected to the control circuit device 80 a. In this embodiment, the control circuit device 80a is further provided with an alarm speaker and a preset air pressure adjusting button, and the preset air pressure adjusting button can adjust different preset air pressure values. When liquid collecting bottle 10a topples over, the accumulated liquid stored in liquid collecting cavity 11 can conduct first top detection column 71 and first bottom detection column 73, or the accumulated liquid can conduct second top detection column 72 and second bottom detection column 74, control circuit device 80a detects that liquid collecting bottle 10a topples over, and the alarm speaker on control circuit device 80a can send out corresponding toppling over alarm sound. When the accumulated liquid stored in the liquid collecting cavity 11 reaches the liquid level, the first top detecting column 71 and the first bottom detecting column 73, the second top detecting column 72 and the second bottom detecting column 74 are both conducted by the accumulated liquid at the same time, the control circuit device 80a detects that the accumulated liquid in the liquid collecting cavity 11 reaches the liquid level, the alarm speaker on the control circuit device 80a will generate the corresponding liquid level alarm sound, the control circuit device 80a can control the motor 32 to rotate and drive the driving wheel 34 through the transmission component 33, the rotating driving wheel 34 drives the driving column 341 to drive the sliding abutting seat 35 to move towards the air release hole 15, when the sliding abutting seat 35 slides to the position right above the air release hole 15 and presses the convex column 3121 to move downwards, the blocking block 312 and the third sealing ring 313 are separated from the air release hole 15 to open the air hole, and simultaneously the sliding abutting seat 35 synchronously slides the blocking block 361 to the pressing rod 21, if the blocking groove 211 is not right opposite to the sliding blocking block 361, then, under the action of the elastic force of the third elastic element 362, the sliding block 361 elastically presses the pressing rod 21 until the pressing rod 21 moves to the blocking groove 211 opposite to the sliding block 361, and the sliding block 361 can be clamped in the blocking groove 211 under the action of the elastic force of the third elastic element 362 to block the pressing rod 21 from moving up and down, so that the air suction communicating groove 13 and the air suction pipe body 12 are both communicated with the outside, and the pressing rod 21 is locked. The better person, control circuit device 80a still has seven days and uses the warning locking function, works as promptly the utility model discloses an infusion pump 100 live time reaches seven days time, and control circuit device 80a control warning speaker sends corresponding decommissioning warning sound to the locking is pressed the depression bar 21, is ensured the utility model discloses an infusion pump 100 is in safe life.

In this embodiment, the control circuit device 80a includes a main board PCB, a microcontroller (for example, but not limited to, the microcontroller ATMEGA48PA-AU produced by ATMEL/elmel), a chip resistor, a chip diode, a chip inductor, and other electronic components, and the specific structure thereof is well known to those skilled in the art, and therefore, the detailed description thereof is omitted. Furthermore, the specific technical structure of the control circuit device 80a electrically connected to the air pressure sensor, the motor 32, the first top detection column 71, the second top detection column 72, the first bottom detection column 73 and the second bottom detection column 74 to achieve air pressure detection in the liquid collection chamber 11, control whether to open the air release hole 15 and lock the pressing rod 21, detect whether the liquid collection bottle 10a is toppled over, and detect whether the accumulated liquid in the liquid collection chamber 11 is full of liquid is well known to those skilled in the art, and therefore, the detailed description thereof is omitted here.

The working principle of the liquid pump 100 of the present invention will be described in detail with reference to the accompanying drawings:

when the device is used, firstly, the inserting end 412 of the inserting head 41 of the liquid pumping assembly 40 is inserted into the inserting port 17, the quick-connection locking piece 60a is driven to move upwards under the elastic action of the fourth elastic piece 60b, so that the locking part 62 is clamped in the locking groove 4121, the inserting end 412 of the inserting head 41 can be tightly locked in the inserting port 17, and then the suction cup 44 is attached to a wound.

The pressing cap 25 of pressing the manual air extractor 20 through the operation, take the external world with the gas in the collecting cavity 11, when the baroceptor detects and reaches preset atmospheric pressure value in the collecting cavity 11, the baroceptor will feed back to the control circuit device 80a, then the control circuit device 80a can control the motor 32 and rotate, and drive wheel 34 through drive assembly 33, pivoted drive wheel 34 drives drive post 341 and drives and slide to touch the seat 35 and slide to disappointing hole 15 directly over and come to press in disappointing subassembly 31, make the subassembly 31 of disappointing open disappointing hole 15, make it all communicate in the external world to bleed and communicate the cell body 13 and bleed the body 12, then even continue to operate manual air extractor 20 and can not take out the gas in the collecting cavity 11 yet. Form the negative pressure in album liquid chamber 11 and avoid the negative pressure in album liquid chamber 11 to hang down excessively, simultaneously, the negative pressure that forms in album liquid chamber 11 can enter into album liquid chamber 11 through the hydrops suction that draws liquid subassembly 40 produced in with the wound.

When the air pressure sensor detects that the pressure in the liquid collecting cavity 11 is lower than a preset air pressure value, and negative pressure in the liquid collecting cavity 11 needs to be compensated, the air pressure sensor feeds back the negative pressure to the control circuit device 80a, the control circuit device 80a can control the motor 32 to continue rotating, and drive the drive wheel 34 through the transmission component 33, the rotating drive wheel 34 drives the drive column 341 to drive the sliding abutting seat 35 to be away from the air leakage hole 15, the air leakage component 31 can block the air leakage hole 15, so that the air suction communicating groove body 13 and the air suction pipe body 12 are both isolated from the outside, and the negative pressure in the gas compensation liquid collecting cavity 11 in the liquid collecting cavity 11 can be continuously extracted by pressing the pressing cap 25 of the manual air suction device 20 through pressing. Until the smoking is finished.

When liquid collecting bottle 10a topples over, the accumulated liquid stored in liquid collecting cavity 11 can conduct first top detection column 71 and first bottom detection column 73, or the accumulated liquid can conduct second top detection column 72 and second bottom detection column 74, control circuit device 80a detects that liquid collecting bottle 10a topples over, and the alarm speaker on control circuit device 80a can send out corresponding toppling over alarm sound.

When the accumulated liquid stored in the liquid collecting cavity 11 reaches the liquid level, the first top detecting column 71 and the first bottom detecting column 73, the second top detecting column 72 and the second bottom detecting column 74 are conducted simultaneously by the accumulated liquid, the control circuit device 80a detects that the accumulated liquid in the liquid collecting cavity 11 reaches the liquid level position, the alarm speaker on the control circuit device 80a generates the corresponding liquid level alarm sound, the control circuit device 80a controls the motor 32 to rotate and drives the driving wheel 34 through the transmission assembly 33, the rotating driving wheel 34 drives the driving column 341 to drive the sliding abutting seat 35 to move towards the air release hole 15, when the sliding abutting seat 35 slides to the position right above the air release hole 15 and presses the convex column 3121 to move downwards, the blocking block 312 and the third sealing ring 313 are separated from the air release hole 15 to open the air hole, and simultaneously the sliding abutting seat 35 synchronously slides the blocking block 361 to be close to the pressing rod 21, if the blocking groove 211 is not opposite to the sliding block 361, the sliding block 361 elastically presses the pressing rod 21 under the action of the elastic force of the third elastic element 362 until the pressing rod 21 moves to the blocking groove 211 opposite to the sliding block 361, and the sliding block 361 can be clamped in the blocking groove 211 under the action of the elastic force of the third elastic element 362 to block the pressing rod 21 from moving up and down, so that the air suction communicating groove body 13 and the air suction pipe body 12 are both communicated with the outside and the pressing rod 21 is locked.

Because the sealing cover 10b of the liquid pump 100 of the utility model is sealed at the top of the liquid collecting bottle 10a, the sealing cover 10b and the liquid collecting bottle 10a form a sealed liquid collecting cavity 11; the manual air extractor 20 is arranged on the liquid collecting bottle 10a and the sealing cover 10b, the manual air extractor 20 is communicated with the liquid collecting cavity 11, and the manual air extractor 20 is operated to extract the gas in the liquid collecting cavity 11 to the outside; the air pressure sensor extends into the liquid collecting cavity 11, and when the air pressure sensor detects that the pressure in the liquid collecting cavity 11 reaches a preset air pressure value, the overpressure and air leakage preventing locking device 30 communicates the air suction end of the manual air suction device 20 with the outside and locks the manual air suction device 20; the control circuit device 80a is electrically connected to the over-pressure and air-leakage prevention locking device 30 and the air pressure sensor; the power supply device 90 is arranged on the sealing cover 10b, and the power supply device 90 is electrically connected to the control circuit device 80 a; the liquid drawing assembly 40 is detachably communicated with the liquid collecting cavity 11. Then inhale and paste drawing liquid subassembly 40 on the wound, the external world is taken out with the gaseous of collecting the liquid chamber 11 through operation manual air exhaust device 20, when baroceptor detected and reached preset atmospheric pressure value in the liquid chamber 11, baroceptor will feed back to control circuit device 80a, then control circuit device 80a can control and prevent that the bleed end of excessive pressure is lost heart locking device 30 with manual air exhaust device 20 communicates in the external world and locks manual air exhaust device 20, form the negative pressure in collecting the liquid chamber 11 and avoid the negative pressure in collecting the liquid chamber 11 to hang down, and simultaneously, the negative pressure that forms in the liquid chamber 11 can enter into collecting the liquid chamber 11 through the hydrops suction that drawing liquid subassembly 40 produced in with the wound in. And different drawing liquid speed and drawing liquid volume can be realized to the atmospheric pressure value of predetermineeing of difference, can come the convenient negative pressure in the compensation collection liquid chamber 11 through operating manual air exhaust device 20 according to the user demand of reality in the use, have simple structure, small, low in manufacturing cost, easy and simple to handle and can carry out the advantage controlled to atmospheric pressure value, drawing liquid speed and drawing liquid volume in the collection liquid chamber 11, it is very convenient to use, avoid appearing the safety risk.

The present invention has been described above with reference to the embodiments, but the present invention is not limited to the above disclosed embodiments, and various modifications and equivalent combinations according to the essence of the present invention should be covered.

Claims

1. An infusion pump, comprising:

a liquid collecting bottle;

the air pressure sensor extends into the liquid collection cavity;

2. The liquid pump according to claim 1, wherein a vertically arranged air-extracting tube body is formed in the liquid collection bottle and isolated from the liquid collection chamber, the upper end of the air-extracting tube body is sealed on the sealing cover, and the lower end of the air-extracting tube body is provided with an air vent communicated with the outside;

3. The liquid pump according to claim 2, further comprising a middle cover fixed to an upper side of the sealing cover, wherein the sealing cover is formed with an air suction communicating groove, and the middle cover is sealed in a notch of the air suction communicating groove; the bottom of the air exhaust communicating groove body is provided with an air inlet communicated with the liquid collecting cavity and an air outlet communicated with the air exhaust pipe body, the air inlet is provided with an air inlet check valve assembly, and the air inlet check valve assembly allows air in the liquid collecting cavity to flow into the air exhaust communicating groove body in a one-way mode.

4. The liquid pump according to claim 3, wherein the air inlet check valve assembly comprises an air inlet valve seat, a second sealing ring and a sealing ball, the air inlet valve seat is fixed between the bottom of the air exhaust communication tank and the middle cover, an air inlet passage communicated with the air inlet is formed on the air inlet valve seat, an annular groove is formed in the air inlet passage, the second sealing ring is fixed in the annular groove, the sealing ball is movably placed on the second sealing ring, and a vent groove communicated between the air inlet passage and the air exhaust communication tank is formed in the top of the air inlet valve seat.

5. The liquid pump according to claim 3, wherein the middle cover is provided with a gas release hole communicated with the gas extraction communicating groove body, the overpressure-preventing gas release locking device comprises a gas release component, a motor, a transmission component, a driving wheel and a sliding abutting seat, the gas release component is arranged in the gas extraction communicating groove body, and the gas release component can selectively block or open the gas release hole; the motor is fixed on the sealing cover and is electrically connected with the control circuit device; the driving wheel is pivoted on the sealing cover around a vertical axial lead, the transmission assembly is connected between the output end of the motor and the driving wheel in a transmission manner, the sliding abutting seat horizontally slides on the upper side of the middle cover, a long driving groove perpendicular to the sliding direction of the sliding abutting seat is formed in the sliding abutting seat, a driving column deviating from the axial lead of the driving wheel vertically extends upwards and is vertically slid in the long driving groove; when the sliding abutting seat slides to a position right above the air release hole and abuts against the air release assembly, the air release assembly opens the air release hole; when the sliding abutting seat is far away from the air leakage hole, the air leakage assembly blocks the air leakage hole.

6. The liquid pump of claim 5, wherein the transmission assembly comprises a worm and a first gear, a second gear, a third gear and a fourth gear vertically pivoted on the upper side of the sealing cover, the second gear has a first upper gear and a first lower gear which are coaxial, and the diameter of the first upper gear is larger than that of the first lower gear; the third gear is provided with a second upper gear and a second lower gear which have the same axis, and the diameter of the second upper gear is smaller than that of the second lower gear; the worm is fixed at the output end of the motor, the worm is meshed with the first gear, the first gear is meshed with the first upper gear, the first lower gear is meshed with the second lower gear, the second upper gear is meshed with the fourth gear, the driving wheel is fixed on the fourth gear, and the driving wheel and the fourth gear have the same axial lead.

7. The liquid pump according to claim 5, wherein the air-bleed component comprises a second elastic member, a blocking block and a third sealing ring, an air-bleed mounting seat located right below the air-bleed hole is formed in the air-bleed communicating groove, the blocking block vertically slides on the air-bleed mounting seat, the second elastic member is compressed and abutted between the air-bleed mounting seat and the blocking block, a convex column is vertically and upwardly extended from the top of the blocking block, the convex column is inserted into the air-bleed hole in a gap manner, and the third sealing ring is sleeved at the bottom of the convex column; the sliding abutting seat slides to a position right above the air leakage hole to abut against the convex column to move downwards, and the blocking block and the third sealing ring are separated from the air leakage hole; when sliding the abutting seat to keep away from in the hole of disappointing, second elastic component orders about the shutoff piece reaches third sealing washer rebound is stopped up the hole of disappointing.

8. The liquid pump according to claim 7, wherein the overpressure and deflation preventing locking device further comprises a locking assembly, the locking assembly comprises a sliding block piece and a third elastic piece, the sliding block piece slides on the sliding abutting seat along the sliding direction of the sliding abutting seat, the third elastic piece is in compression abutting connection between the sliding abutting seat and the sliding block piece, the pressing rod is provided with a blocking groove for clamping the sliding block piece, and when the pressing rod is retracted into the pumping tube, the blocking groove faces the sliding block piece.

9. The aspiration pump of claim 3, further comprising a top cover secured to the seal cover, the top cover and the seal cover defining a mounting cavity therebetween, the middle cover being positioned within the mounting cavity;

10. The fluid infusion pump according to any one of claims 2 to 9, further comprising a top-fill-dump detection assembly, wherein the top-fill-dump detection assembly comprises a first top detection column, a second top detection column, a first bottom detection column and a second bottom detection column, wherein the first top detection column, the second top detection column, the first bottom detection column and the second bottom detection column are vertically fixed on the sealing cover, the first top detection column and the second top detection column extend into the top of the fluid collection chamber to a predetermined position, and the first bottom detection column and the second bottom detection column extend into the bottom of the fluid collection chamber to a predetermined position; the first bottom detection column is positioned at the upper left of the liquid collection cavity, and the second bottom detection column is positioned at the upper right of the liquid collection cavity; the air exhaust pipe body is positioned in the middle of the liquid collecting cavity, the first bottom detection column is positioned on the left side of the air exhaust pipe, and the second bottom detection column is positioned on the right side of the air exhaust pipe; the first top detection column, the second top detection column, the first bottom detection column and the second bottom detection column are electrically connected to the control circuit device.