阅读说明：本技术 一种改进的防回流负压器 (Improved anti-backflow negative pressure device ) 是由 程蕾 李敬东 游川 武国 凌梦 李晓琴 魏海鸽 李欢 于 2021-09-03 设计创作，主要内容包括：本发明公开了一种改进的防回流负压器,包括装置主体,所述装置主体包括支撑架、固定架、第一负压引流瓶以及第二负压引流瓶,所述第一负压引流瓶与第二负压引流瓶的外壁一侧均通过嵌入方式连接三通接头的一端,所述三通接头内部贯穿连接有引流管,所述引流管的外壁一侧安装有止逆阀,所述止逆阀包括阀体、警报器、扬声器、固定块、固定杆、第三密封盖以及感应器,所述阀体固定连接在引流管外壁一侧,所述阀体顶部通过安装有警报器,所述警报器的内部电性连接有扬声器,且所述警报器的表面设有开关以及显示器,所述阀体内部一侧通过粘接的方式连接固定块一侧,有效的防废液回流至患者体内加重病情以及感染的风险,减轻了医护人员的工作负担。(The invention discloses an improved anti-backflow negative pressure device, which comprises a device main body, wherein the device main body comprises a supporting frame, a fixing frame, a first negative pressure drainage bottle and a second negative pressure drainage bottle, one side of the outer wall of each of the first negative pressure drainage bottle and the second negative pressure drainage bottle is connected with one end of a three-way joint in an embedding mode, a drainage tube penetrates through the inside of the three-way joint, one side of the outer wall of the drainage tube is provided with a check valve, the check valve comprises a valve body, an alarm, a loudspeaker, a fixing block, a fixing rod, a third sealing cover and an inductor, the valve body is fixedly connected with one side of the outer wall of the drainage tube, the top of the valve body is provided with the alarm, the inside of the alarm is electrically connected with the loudspeaker, the surface of the alarm is provided with a switch and a display, one side of the inside of the valve body is connected with one side of the fixing block in a bonding mode, the effective liquid waste is prevented from flowing back to the patient body to aggravate the illness state and the infection risk, and the work burden of medical staff is reduced.)

1. An improved backflow prevention negative pressure device is characterized in that: comprises a device main body (1), the device main body (1) comprises a support frame (2), a fixing frame (3), a first negative pressure drainage bottle (4) and a second negative pressure drainage bottle (8), one side of the outer wall of the first negative pressure drainage bottle (4) and one side of the outer wall of the second negative pressure drainage bottle (8) are both connected with one end of a three-way joint (10) in an embedding mode, a drainage tube (9) is connected inside the three-way joint (10) in a penetrating manner, a check valve (11) is installed on one side of the outer wall of the drainage tube (9), the check valve (11) comprises a valve body (111), an alarm (112), a loudspeaker (113), a fixing block (114), a fixing rod (115), a third sealing cover (116) and an inductor (117), the valve body (111) is fixedly connected on one side of the outer wall of the drainage tube (9), the alarm (112) is installed on the top of the valve body (111), the inside electric connection of siren (112) has speaker (113), just the surface of siren (112) is equipped with switch and display, inside one side of valve body (111) is through the mode connection fixed block (114) one side that bonds.

2. The improved backflow-prevention negative pressure device as claimed in claim 1, wherein: the end part of a fixing rod (115) is fixedly connected to the other side of the fixing block (114), one side of the outer wall of the fixing rod (115) is connected with one side of a third sealing cover (116) in a penetrating mode, the fixing rod (115) protrudes out of the surface of the third sealing cover (116), one side of an inductor (117) is fixedly connected to one side of the inner wall of the valve body (111), and the other side of the inductor (117) is attached to one side of the third sealing cover (116).

3. The improved backflow-prevention negative pressure device as claimed in claim 1, wherein: support frame (2) include pillar (201), connecting block (202), connecting rod (203) and remove wheel (204), the inner wall of mode fixed connection connecting block (202) through the embedding is passed through to pillar (201) bottom, connecting block (202) outside evenly distributed has four groups connecting rod (203), four groups bottom one side fixed mounting of connecting rod (203) has removal wheel (204).

4. The improved backflow-prevention negative pressure device as claimed in claim 1, wherein: first negative pressure drainage bottle (4) and second negative pressure drainage bottle (8) place the both sides in mount (3) respectively, mount (3) are including support (301) and storage rack (302), support (301) inner wall cup joints in outer wall one side of pillar (201), just support (301) are through the top of bolt fixed connection pillar (201).

5. The improved backflow-prevention negative pressure device as claimed in claim 4, wherein: support (301) tip outer wall both sides all connect one side of storage rack (302) through the welded mode, storage rack (302) are the symmetric distribution form, just storage rack (302) inside first negative pressure drainage bottle (4) and second negative pressure drainage bottle (8) of having placed respectively.

6. The improved backflow-prevention negative pressure device as claimed in claim 1, wherein: the first negative pressure drainage bottle (4) comprises a first sealing cover (401) and a first connecting head (402), the top of the first negative pressure drainage bottle (4) is sleeved with the first sealing cover (401), the top of the first sealing cover (401) is fixedly connected with the bottom of the first connecting head (402) in an embedded mode, and the first connecting head (402) protrudes out of the first sealing cover (401).

7. The improved backflow-prevention negative pressure device as claimed in claim 6, wherein: the first connecting joints (402) are symmetrically distributed, two groups are arranged, and a first negative pressure connecting pipe (5) is inserted into the end part of the first connecting joint (402) on one side.

8. The improved backflow-prevention negative pressure device as claimed in claim 7, wherein: one side end of the first negative pressure connecting pipe (5) is inserted with a VAC connector (6), a pressure gauge is arranged on the VAC connector (6), the other side of the first negative pressure connecting pipe (402) is inserted with a second negative pressure connecting pipe (7), and one side end of the second negative pressure connecting pipe (7) is fixedly connected with a second negative pressure drainage bottle (8).

9. The improved backflow-prevention negative pressure device as claimed in claim 8, wherein: second negative pressure drainage bottle (8) are including the sealed lid of second (801) and second connector (802), the sealed lid of second (801) has been cup jointed at the top of second negative pressure drainage bottle (8), the top of the sealed lid of second (801) is through the bottom fixed connection of the mode of embedding and second connector (802), and second connector (802) salient in the sealed lid of second (801), second connector (802) are the symmetric distribution form and are equipped with two sets ofly altogether, and one side second connector (802) tip has inserted second negative pressure connecting pipe (7), this opposite side second connector (802) tip has inserted drainage tube (9).

Technical Field

The invention relates to the technical field of medical instruments, in particular to an improved anti-backflow negative pressure device.

Background

The negative pressure suction device consists of a pressure regulator, a liquid collecting bottle, a hose and the like. The liquid collecting bottle is provided with two hose connectors, one hose connector is connected with the negative pressure terminal, and the other hose connector is connected with the working cavity. When the negative pressure terminal is connected, air negative pressure is generated in the liquid collecting bottle, and the negative pressure guides dirt (such as dirty blood, phlegm and the like) to flow into the liquid collecting bottle from the other hose. When the liquid in the liquid collecting bottle reaches a certain height, the stop valve on the liquid collecting bottle cap starts to work to cut off the liquid inflow pipeline, so that the liquid in the liquid collecting bottle is prevented from overflowing due to interference. Considering the difference of drainage volume, can cascade a plurality of collecting bottles to realize the extraction and the storage of the liquid of many volume, stomach intestines decompression is the stomach tube and inserts from patient's oral area or nasal cavity, utilizes siphon principle and negative pressure to make the stomach content draw the external method of patient through the pipe, thereby reduces the pressure in the stomach intestines and stomach.

Through the retrieval, patent one, chinese patent grant number is CN 2117977U's patent, discloses a negative pressure ware, including stomach tube body and negative pressure ware body, the one end of stomach tube body is the opening form, the outside of negative pressure ware body is provided with the fender bracket, the lower extreme fixed mounting of negative pressure ware body has the fluid-discharge tube, the upper end threaded connection of negative pressure ware body has the upper cover, the upper end fixed mounting of upper cover has negative pressure table, pipe and blast pipe. This negative-pressure device, a plurality of side openings have been seted up in the outside of stomach tube body, side opening through setting up can accelerate the absorption speed, absorption that simultaneously can be even, patient's comfort level is improved, the fender bracket negative-pressure device body through setting up is protected and is supported, prevent that the negative-pressure device body from receiving the extrusion of external force and deforming damage, avoid influencing patient's treatment, the miniature aspirator pump through setting up makes the inside negative pressure that produces of negative-pressure device body, thereby rethread pipe and stomach tube body treat the patient, the opening part of pipe and stomach tube body is identical, and there is not the step, thereby the resistance that reduces greatly, convenient to use.

Through retrieval, patent II, the patent with the Chinese patent authorization number of CN 101224319A, discloses a marrow-expanding product retaining device through a negative pressure suction apparatus pipeline, adopts the negative pressure suction apparatus pipeline, the front end of the negative pressure suction apparatus pipeline is a suction head, and the tail part of the negative pressure suction apparatus pipeline is communicated with a negative pressure drainage bottle; it is characterized in that a marrow-expanding product cut-off device is arranged in series in the pipeline of the negative pressure aspirator. The invention can realize the recovery of the reaming product in the pipeline of the negative pressure aspirator, thereby effectively utilizing the reaming product in the intramedullary nail internal fixation and promoting the fracture healing.

Through the retrieval, patent three, chinese patent grant number is CN 207562065U's patent, it puts device to disclose intestines and stomach negative pressure ware, comprising a bed body, fixed cover, the connecting plate, the adapter sleeve, first dwang, first bolt, the second dwang, the second bolt, place the box, this intestines and stomach negative pressure ware placer, and is ingenious in structure, functions are powerful, and the operation is thus simple, through using the device, can be in the bed body bottom with the negative pressure ware and place, prevent that the negative pressure ware from receiving external force collision and causing the damage, play the guard action to the negative pressure ware, and simultaneously, the device is convenient for medical personnel and at any time takes the use to the negative pressure ware, and the effectual portability that medical personnel used the negative pressure ware that has improved.

The above patents have the following disadvantages:

1. in the process of conducting negative pressure drainage on a patient, medical staff in a department can not observe the state of the drainage device for a long time, when the drainage device has problems, the device is easy to cause the phenomenon of liquid backflow, and the body of the patient is greatly damaged;

2. moreover, in the process of liquid backflow, the device cannot achieve the warning effect to remind medical workers of timely treatment, so that the risk of medical accidents is increased.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an improved anti-backflow negative pressure device, which solves the problem that in the negative pressure drainage process of a patient, medical personnel in a department cannot observe the state of a drainage device for a long time, when the drainage device is in a problem, the device is easy to generate the phenomenon of liquid backflow, and causes great harm to the body of the patient; 2. moreover, in the process of liquid backflow, the device cannot achieve the warning effect to remind medical workers of timely treatment, so that the risk of medical accidents is increased.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a modified anti-return negative pressure ware, includes the device main part, the device main part includes support frame, mount, first negative pressure drainage bottle and second negative pressure drainage bottle, the one end of tee bend joint is all connected through the embedding mode to outer wall one side of first negative pressure drainage bottle and second negative pressure drainage bottle, the inside through connection of tee bend joint has the drainage tube, the check valve is installed to outer wall one side of drainage tube, the check valve includes valve body, siren, speaker, fixed block, dead lever, the sealed lid of third and inductor, valve body fixed connection is in drainage tube outer wall one side, the siren is installed through the valve body top, the inside electric connection of siren has the speaker, just the surface of siren is equipped with switch and display, fixed block one side is connected through the mode that bonds to the inside one side of valve body.

Preferably, the other side of the fixed block is fixedly connected with the end part of a fixed rod, one side of the outer wall of the fixed rod is connected with one side of a third sealing cover in a penetrating mode, the fixed rod protrudes out of the surface of the third sealing cover, one side of the inner wall of the valve body is fixedly connected with one side of an inductor, and the other side of the inductor is attached to one side of the third sealing cover.

Preferably, the support frame includes pillar, connecting block, connecting rod and removal wheel, the inner wall of mode fixed connection connecting block is passed through to the pillar bottom, connecting block outside evenly distributed has four groups of connecting rods, four groups bottom one side fixed mounting of connecting rod has the removal wheel.

Preferably, first negative pressure drainage bottle and second negative pressure drainage bottle place the both sides at the mount respectively, the mount includes support and storage rack, the support inner wall cup joints in outer wall one side of pillar, just the support passes through the top of bolt fixed connection pillar.

Preferably, one side of storage rack is all connected through the welded mode to support tip outer wall both sides, the storage rack is the symmetric distribution form, just first negative pressure drainage bottle and second negative pressure drainage bottle have been placed respectively to the storage rack inside.

Preferably, the first negative pressure drainage bottle comprises a first sealing cover and a first connector, the top of the first negative pressure drainage bottle is sleeved with the first sealing cover, the top of the first sealing cover is fixedly connected with the bottom of the first connector in an embedded mode, and the first connector protrudes out of the first sealing cover.

Preferably, the first connectors are symmetrically distributed, and two groups of the first connectors are arranged, and a first negative pressure connecting pipe is inserted into the end of the first connector on one side.

Preferably, a VAC connector is inserted into one side end of the first negative pressure connecting pipe, a pressure gauge is arranged on the VAC connector, a second negative pressure connecting pipe is inserted into the other side of the first negative pressure connecting pipe, and one side end of the second negative pressure connecting pipe is fixedly connected with a second negative pressure drainage bottle.

Preferably, the second negative pressure drainage bottle includes the sealed lid of second and second connector, the sealed lid of second has been cup jointed at the top of second negative pressure drainage bottle, the bottom fixed connection of the mode of the top of the sealed lid of second through embedding and second connector, and the second connector salient in the sealed lid of second, the second connector is the symmetric distribution form and is equipped with two sets ofly altogether, and one side the second negative pressure connecting pipe has been inserted to the second connector tip, this opposite side the drainage tube has been inserted to the second connector tip.

(III) advantageous effects

The invention provides an improved backflow-preventing negative pressure device. The method has the following beneficial effects:

(1) this modified anti-return negative pressure ware, through the combination of each part each other, effectual anti-waste liquid flows back to the internal risk of aggravating the state of an illness and infecting of patient, has improved the effect of treatment greatly, has alleviateed medical personnel's work burden to, through the setting of siren, can make medical personnel and discovery problem and solve the problem when taking place the waste liquid backward flow, effectively avoid the emergence of medical malpractice.

(2) This modified anti-return negative pressure ware, setting through the check valve, when carrying out negative pressure imbibition during operation, under the effect of negative pressure, produce suction, can make the sealed lid of third that its inside set up open smoothly, make the waste liquid pass through the drainage tube drainage to first negative pressure drainage bottle and second negative pressure drainage bottle inside, when negative pressure work stops or breaks off, under the effect of losing the suction, but through the combination of dead lever and fixed block automatic closure third sealed lid, the phenomenon of waste liquid backward flow avoids appearing, patient's health has been guaranteed.

(3) This modified anti-return negative pressure ware through the combination of support frame and mount, can place first negative pressure drainage bottle and second negative pressure drainage bottle in the mount, and simultaneously, the mount can be fixed in the setting of support frame to, make things convenient for medical personnel to remove the whole of the device main part, alleviate medical personnel's work burden.

Drawings

FIG. 1 is a schematic structural view of the present invention as a whole;

FIG. 2 is a side view of the present invention in its entirety;

FIG. 3 is a front view of the present invention as a whole;

FIG. 4 is a schematic structural diagram of a connector according to the present invention;

FIG. 5 is a schematic view of the check valve of the present invention;

fig. 6 is a schematic view of the internal structure of the check valve of the present invention.

In the figure, 1, an apparatus main body; 2. a support frame; 201. a pillar; 202. connecting blocks; 203. a connecting rod; 204. a moving wheel; 3. a fixed mount; 301. a support; 302. a storage rack; 4. a first negative pressure drainage bottle; 401. a first sealing cover; 402. a first connector; 5. a first negative pressure connection pipe; 6. a VAC connector; 7. a second negative pressure connection pipe; 8. a second negative pressure drainage bottle; 801. a second sealing cover; 802. a second connector; 9. a drainage tube; 10. a three-way joint; 11. a non-return valve; 111. a valve body; 112. an alarm; 113. a speaker; 114. a fixed block; 115. fixing the rod; 116. a third sealing cover; 117. an inductor.

Detailed Description

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

Referring to fig. 1-6, an embodiment of the present invention provides a technical solution: the utility model provides a modified anti-return negative pressure ware, includes device main part 1, device main part 1 includes support frame 2, mount 3, first negative pressure drainage bottle 4 and second negative pressure drainage bottle 8, the one end of three way connection 10 is all connected through the embedding mode to outer wall one side of first negative pressure drainage bottle 4 and second negative pressure drainage bottle 8, the inside through connection of three way connection 10 has drainage tube 9, check valve 11 is installed to outer wall one side of drainage tube 9, check valve 11 includes valve body 111, siren 112, speaker 113, fixed block 114, dead lever 115, the sealed 116 of third and inductor 117, valve body 111 fixed connection is in drainage tube 9 outer wall one side, siren 112 is installed through installing at valve body 111 top, siren 112's inside electric connection has speaker 113, just siren 112's surface is equipped with switch and display, the valve comprises a valve body 111, a fixing rod 115, a sensor 117 and a sensor 117, wherein one side of the inside of the valve body 111 is connected with one side of the fixing block 114 in a bonding mode, the other side of the fixing block 114 is fixedly connected with the end part of the fixing rod 115, one side of the outer wall of the fixing rod 115 is connected with one side of the third sealing cover 116 in a penetrating mode, the fixing rod 115 protrudes out of the surface of the third sealing cover 116, one side of the inner wall of the valve body 111 is fixedly connected with one side of the sensor 117, and the other side of the sensor 117 is attached to one side of the third sealing cover 116.

In this embodiment, the walls of the first negative pressure drainage bottle 4 and the second negative pressure drainage bottle 8 are provided with a three-way joint 10, one end of the drainage tube 9 is connected with a second connector 802 arranged at the top of the second negative pressure drainage bottle 8, meanwhile, the drainage tube 9 respectively penetrates through the three-way joint 10 on the outer walls of the first negative pressure drainage bottle 4 and the second negative pressure drainage bottle 8 and extends out, the other end of the drainage tube 9 is connected with the check valve 11, a medical worker can connect the drainage tube 9 arranged at one side of the check valve 11 with the pipette, when in use, the top of the check valve 11 is provided with an alarm 112 electrically connected with an inductor 117 arranged inside the alarm, when performing negative pressure pipetting, under the action of negative pressure, suction force is generated, the third sealing cover 116 arranged inside the check valve 11 opens the first sealing cover 401 through the combination of the fixing rod 115 and the fixing block 114 under the action of suction force, the internal waste liquid of patient also gets into drainage tube 9 along the pipette, until drainage to first negative pressure drainage bottle 4 and second negative pressure drainage bottle 8 inside, when negative pressure work stops or interrupt, under the effect of losing the suction, can automatic closure third sealed lid 116 through the combination of dead lever 115 and fixed block 114, if the sealed not tight condition of lid 116 of third appears, its inside inductor 117 that sets up can in time be with signal transmission to siren 112 in, send out the police dispatch newspaper by speaker 113 in siren 112, remind medical personnel to appear the waste liquid backward flow phenomenon, in time treat, reduce the patient misery.

The supporting frame 2 comprises a supporting column 201, a connecting block 202, a connecting rod 203 and a moving wheel 204, the bottom of the supporting column 201 is fixedly connected with the inner wall of the connecting block 202 in an embedded mode, four groups of connecting rods 203 are uniformly distributed on the outer side of the connecting block 202, one side of the bottom of each group of connecting rods 203 is fixedly provided with a moving wheel 204, the first negative pressure drainage bottle 4 and the second negative pressure drainage bottle 8 are respectively arranged at two sides of the fixing frame 3, the fixing frame 3 comprises a bracket 301 and a storage rack 302, the inner wall of the bracket 301 is sleeved on one side of the outer wall of the supporting column 201, the support 301 is fixedly connected with the top of the support 201 through bolts, two sides of the outer wall of the end part of the support 301 are connected with one side of the storage rack 302 in a welding mode, the storage racks 302 are symmetrically distributed, and the storage rack 302 is internally provided with a first negative pressure drainage bottle 4 and a second negative pressure drainage bottle 8 respectively.

In this embodiment, support 301 in mount 3 embolias to the pillar 201 in, and bolted connection is passed through at the top of pillar 201 at its top, support 301 both sides welded storage rack 302, be used for placing first negative pressure drainage bottle 4 and second negative pressure drainage bottle 8, and simultaneously, the pillar 201 of support frame 2 bottom is connected on connecting block 202, by the tip fixed connection of connecting block 202 with connecting rod 203, and, the bottom and the removal wheel 204 of connecting block 202 are connected, can make things convenient for medical personnel to remove the whole of the device main part 1, alleviate medical personnel's work burden.

First negative pressure drainage bottle 4 includes first sealed lid 401 and first connector 402, first sealed lid 401 has been cup jointed at the top of first negative pressure drainage bottle 4, the bottom fixed connection of the mode of embedding and first connector 402 is passed through at the top of first sealed lid 401, and first connector 402 salient in first sealed lid 401, first connector 402 is the symmetric distribution form and is equipped with two sets ofly altogether, and one side first connector 402 tip has inserted first negative pressure connecting pipe 5, one side tip of first negative pressure connecting pipe 5 has inserted VAC connector 6, just be provided with the manometer on the VAC connector 6, this opposite side second negative pressure connecting pipe 7 has been inserted to first connector 402 tip, second negative pressure connecting pipe 7 one side tip fixed connection second negative pressure drainage bottle 8.

In this embodiment, during the use, with the VAC connector 6 that the tip of first negative pressure connecting pipe 5 is connected and the VAC interface connection on the sick bed, the manometer that the top of VAC connector 6 set up can show its inside negative pressure state in real time, simultaneously, the opposite side tip of first negative pressure connecting pipe 5 inserts on putting first connector 402, this first connector 402 is equipped with two sets altogether, the first connector 402 second negative pressure connecting pipe 7 of opposite side is connected, and second negative pressure connecting pipe 7 and the second connector 802 fixed connection that the top of second negative pressure drainage bottle 8 set up.

Second negative pressure drainage bottle 8 includes the sealed lid 801 of second and second connector 802, the sealed lid 801 of second has been cup jointed at the top of second negative pressure drainage bottle 8, the bottom fixed connection of the mode of the top of the sealed lid 801 of second through embedding and second connector 802, and second connector 802 salient in the sealed lid 801 of second, second connector 802 is symmetrical distribution form and is equipped with two sets ofly altogether, and one side second connector 802 tip has inserted second negative pressure connecting pipe 7, this opposite side second connector 802 tip has inserted drainage tube 9.

In this embodiment, the top of the second sealing cover 801 sleeved on the second negative pressure drainage bottle 8 is provided with a second connector 802, the second connector 802 on the other side is inserted into one end of the drainage tube 9, and the whole liquid suction work is completed by combining the first negative pressure drainage bottle 4, the second negative pressure drainage bottle 8, the first negative pressure connecting tube 5 and the second negative pressure connecting tube 7 with the drainage tube 9.

It should be noted that, in the improved anti-backflow negative pressure device, when in use, the VAC connector 6 connected with the end of the first negative pressure connecting pipe 5 is connected with the VAC interface on the hospital bed, the pressure gauge arranged on the top of the VAC connector 6 can display the internal negative pressure state in real time, when negative pressure imbibition work is carried out, suction force is generated under the action of negative pressure, the third sealing cover 116 arranged inside the check valve 11 opens the first sealing cover 401 through the combination of the fixing rod 115 and the fixing block 114 under the action of suction force, waste liquid in the patient body also enters the drainage tube 9 along the pipette until the waste liquid is drained into the first negative pressure drainage bottle 4 and the second negative pressure drainage bottle 8, when the negative pressure work stops or is interrupted, the third sealing cover 116 can be automatically closed through the combination of the fixing rod 115 and the fixing block 114 under the action of losing suction force, when negative pressure work is carried out, if backflow phenomenon occurs, the alarm 112 arranged on the top of the check valve 11 can respond in time, so that medical personnel can find problems and solve the problems, and medical accidents are effectively avoided.

The present invention 1, device body; 2. a support frame; 201. a pillar; 202. connecting blocks; 203. a connecting rod; 204. a moving wheel; 3. a fixed mount; 301. a support; 302. a storage rack; 4. a first negative pressure drainage bottle; 401. a first sealing cover; 402. a first connector; 5. a first negative pressure connection pipe; 6. a VAC connector; 7. a second negative pressure connection pipe; 8. a second negative pressure drainage bottle; 801. a second sealing cover; 802. a second connector; 9. a drainage tube; 10. a three-way joint; 11. a non-return valve; 111. a valve body; 112. an alarm; 113. a speaker; 114. a fixed block; 115. fixing the rod; 116. a third sealing cover; 117. the sensor comprises a sensor body, a sensor body and a drainage device, wherein the sensor body is a universal standard part or a part known by technicians in the field, and the structure and the principle of the sensor body can be known by technicians through technical manuals or conventional experimental methods; in addition, in the process of liquid backflow, the device cannot achieve the warning effect to remind medical staff of timely treatment, so that the risk of medical accidents is increased.

While there have been shown and described what are at present considered the fundamental principles and essential features of the invention and its advantages, it will be apparent to those skilled in the art that the invention is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.