Negative pressure drainage device

Abstract

The present invention provides a negative pressure drainer, which relates to the technical field of medical devices. The negative pressure drainer includes a drainer body and a connector, wherein the connector includes a first connector and a second connector detachably connected to the first connector; the first connector is used to connect to a drainage tube, and the first connector has a first flow cavity, and the first flow cavity is connected to the drainage tube; the second connector has a second connecting cavity connected to the first connecting cavity, and the end of the second connector away from the first connector is connected to the drainer body. When the negative pressure drainer needs to be replaced, the second connector of the negative pressure drainer in use is only disassembled from the first connector, and the second connector of the new negative pressure drainer is installed on the first connector of the negative pressure drainer in use, so that the replacement of the negative pressure drainer can be achieved, which improves the convenience of operation and reduces the labor intensity of medical staff.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a negative pressure drainer. Background Art

[0002] The negative pressure drain is a commonly used medical device in clinical practice. The negative pressure drain is used to connect to the drainage tube implanted in the patient's body to drain the patient's body fluids or blood to the outside of the body after surgery.

[0003] In the related art, the negative pressure drain device includes a drainage fluid storage tank, a connecting tube and a connecting head, wherein one end of the drainage tube is connected to the drain device body, and the other end is connected to the connecting head, and the connecting head is used to connect to the drainage tube implanted in the patient's body. After the patient has completed the operation, the medical staff will install a negative pressure drain device on the drainage tube implanted in the patient's body. After the negative pressure drain device has been used for a period of time, when the negative pressure drain device needs to be replaced, the connecting tube of the negative pressure drain device in use is usually removed from the connecting head first, and then the connecting head of the new negative pressure drain device is removed from the connecting tube, and finally the connecting tube of the new negative pressure drain device is connected to the connecting head of the negative pressure drain device in use to complete the replacement of the negative pressure drain device.

[0004] However, when replacing the negative pressure drain, there are problems of inconvenient operation and high labor intensity. Summary of the invention

[0005] In view of the above problems, an embodiment of the present invention provides a negative pressure drainer, which can achieve rapid replacement of the negative pressure drainer and reduce labor intensity.

[0006] In order to achieve the above purpose, the embodiment of the present invention provides the following technical solutions:

[0007] An embodiment of the present invention provides a negative pressure drainer, which includes a drainer body and a connector, wherein the connector includes a first connector and a second connector detachably connected to the first connector; the first connector is used to connect to a drainage tube, and the first connector has a first flow cavity, and the first flow cavity is connected to the drainage tube; the second connector has a second connecting cavity connected to the first connecting cavity, and the end of the second connector facing away from the first connector is connected to the drainer body.

[0008] The negative pressure drain device as described above, wherein the first connecting head comprises a first cylinder with openings at both ends, and an external thread is formed on the outer surface of the first cylinder; the second connecting head comprises a second cylinder with openings at both ends, and an internal thread is formed on the inner surface of the second cylinder, and the second connecting head is connected to the first connecting head by threads; the inner cavity of the first cylinder constitutes the first connecting cavity, and the inner cavity of the second cylinder constitutes the second connecting cavity.

[0009] The negative pressure drainer as described above, wherein the first connecting head includes a first cylinder with openings at both ends, and the second connecting head includes a second cylinder with openings at both ends, and the first cylinder extends into the second cylinder; the outer circumferential surface of the first cylinder protrudes outward to form a first annular protrusion, and the outer circumferential surface of the second cylinder protrudes outward to form a second annular protrusion, and a plug-in column is provided on the side of the first annular protrusion close to the second annular protrusion, and a plug-in groove matching the plug-in groove is provided on the side of the second annular protrusion facing the first annular protrusion.

[0010] The negative pressure drain device as described above, wherein the first cylinder includes a first conical section and a first straight pipe section connected to the first conical section; the second cylinder includes a second conical section and a second straight pipe section connected to the second conical section; the first straight pipe section extends into the second straight pipe section; the first annular protrusion is arranged at the connection between the first conical section and the first straight pipe section, and the second annular protrusion is arranged on the second straight pipe section.

[0011] As described above, the negative pressure drainer, wherein the second annular protrusion is further provided with a hook, and the end of the hook facing away from the second annular protrusion is engaged with the first annular protrusion.

[0012] The negative pressure drain device as described above, wherein the number of the hooks is multiple, and the multiple hooks are arranged at intervals along the circumferential direction of the second annular protrusion.

[0013] As described above, the negative pressure drainer, wherein an annular sealing groove is provided on the side of the second annular protrusion close to the first annular protrusion, a sealing ring is provided in the annular sealing groove, and the sealing ring is sealed and connected to the side of the first annular protrusion facing the second annular protrusion.

[0014] The negative pressure drain device as described above, wherein the drain device body includes a storage tank, a connecting pipe connected to the storage tank, and a flow regulator arranged on the connecting pipe, and the end of the connecting pipe facing away from the storage tank is connected to the second connecting head; the connecting pipe sleeve is provided with a transparent protective cover, the transparent protective cover is located between the storage tank and the flow regulator, and the hardness of the transparent protective cover is greater than the hardness of the connecting pipe.

[0015] The negative pressure drain device as described above, wherein the storage tank includes a top surface, a bottom surface, and a side surface connecting the top surface and the bottom surface, the connecting pipe is arranged on the top surface, and a first liquid outlet is provided on the top surface, and a first screw plug is screwed onto the first liquid outlet.

[0016] The negative pressure drain device as described above, wherein the bottom surface of the storage tank is an inclined surface; the inclined surface is along a direction perpendicular to the axis of the storage tank, the inclined surface has a first end and a second end, the distance from the first end to the top surface is smaller than the distance from the second end to the top surface, a second liquid outlet is provided at a position of the inclined surface close to the second end, and a second screw plug is screwed onto the second liquid outlet.

[0017] In the negative pressure drain device provided in the embodiment of the present invention, by setting the connecting head as a first connecting head and a second connecting head detachably connected to the first connecting head, when the negative pressure drain device needs to be replaced, only the second connecting head of the negative pressure drain device in use is removed from the first connecting head, and then the second connecting head of the new negative pressure drain device is installed on the first connecting head of the negative pressure drain device in use. In this way, the negative pressure drain device can be replaced without the need for medical staff to separate the connecting head and the connecting tube by force as in the related art. This improves the operating convenience while reducing the labor intensity of medical staff.

[0018] In addition to the technical problems solved by the embodiments of the present invention described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the negative pressure drainage device provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of the structure of a negative pressure drainage device provided in an embodiment of the present invention;

[0021] Figure 2 A schematic diagram of the structure of the connector provided in the embodiment of the present invention Figure 1 ;

[0022] Figure 3 A schematic diagram of the structure of the connector provided in the embodiment of the present invention Figure 2 ;

[0023] Figure 4 A schematic diagram of the structure of the connector provided in the embodiment of the present invention Figure 3 ;

[0024] Figure 5 for Figure 4 Explosion diagram of

[0025] Figure 6 A schematic diagram of the structure of the connector provided in the embodiment of the present invention Figure 4 ;

[0026] Figure 7 A schematic diagram of the structure of the connector provided in the embodiment of the present invention Figure 5 .

[0027] Reference numerals:

[0028] 100: drainage device body;

[0029] 110: Storage tank;

[0030] 120: connecting pipe;

[0031] 130: first liquid outlet;

[0032] 140: first screw plug;

[0033] 150: second liquid outlet;

[0034] 160: second screw plug;

[0035] 170: flow regulator;

[0036] 200: connector;

[0037] 210: first connector;

[0038] 211: first tapered section;

[0039] 212: The first straight pipe section;

[0040] 213: first annular protrusion;

[0041] 214: plug-in column;

[0042] 220: second connector;

[0043] 221: second tapered section;

[0044] 222: second straight pipe section;

[0045] 223: second annular protrusion;

[0046] 224: plug-in slot;

[0047] 300: hook;

[0048] 400: annular sealing groove;

[0049] 500: Sealing ring. DETAILED DESCRIPTION

[0050] The inventor of the present invention discovered during actual work that whether removing the connecting tube from the negative pressure drainage device in use, or removing the connecting head from the new negative pressure drainage device, or installing the connecting tube of the new negative pressure drainage device on the connecting head of the negative pressure drainage device in use, medical staff are required to use force to remove the connecting tube from the connecting head, or to use force to install the connecting tube on the connecting head, which results in inconvenience in installation and disassembly.

[0051] In addition, if the medical staff operates improperly, the drainage tube on the patient may easily rupture, causing the patient's body fluids or blood and other contaminants to splash onto the medical staff or other personnel, increasing the risk of infection.

[0052] In view of the above-mentioned technical problems, an embodiment of the present invention provides a negative pressure drainer. By setting the connecting head as a first connecting head and a second connecting head that are detachably connected, when the negative pressure drainer needs to be replaced, only the second connecting head of the negative pressure drainer in use is removed from the first connecting head, and then the second connecting head of the new negative pressure drainer is installed on the first connecting head of the negative pressure drainer in use. In this way, the negative pressure drainer can be replaced without the need for medical staff to separate the connecting head and the connecting tube by force as in the related art. This improves the operating convenience while reducing the labor intensity of medical staff.

[0053] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0054] The embodiment of the present invention provides a negative pressure drainer for draining body fluid or blood of a postoperative patient to the outside of the body. In this embodiment, the body fluid or blood is collectively referred to as drainage fluid.

[0055] The negative pressure drainer includes a drainer body 100 , which includes a storage tank 110 and a connecting tube 120 . The storage tank 110 is used to store drainage fluid of a postoperative patient, and the connecting tube 120 is used to drain the drainage fluid of a postoperative patient into the storage tank 110 .

[0056] like Figure 1As shown, the storage tank 110 includes a top surface, a bottom surface, and a side surface for connecting the top surface and the bottom surface, and the top surface, the bottom surface, and the side surface enclose a receiving cavity for receiving body fluids or blood of a postoperative patient, wherein the shape of the receiving cavity can be cylindrical or other irregular shapes.

[0057] The side of the storage tank 110 is configured to be foldable and corrugated. When the negative pressure drain is not needed, the storage tank 110 can be folded up to facilitate storage of the storage tank 110 and save storage space. When the negative pressure drain is needed, the side of the storage tank 110 can be stretched so that the storage tank is in a stretched state, which facilitates the storage of drainage fluid of the postoperative patient into the storage tank.

[0058] The connecting tube 120 is disposed on the top surface of the storage tank 110, wherein the connecting tube 120 can be integrally formed with the storage tank 110, thereby improving the connection strength between the connecting tube 120 and the storage tank 110. In addition, a connecting hole can be disposed on the top surface of the storage tank 110, and the connecting tube 120 can be bonded into the connecting hole, so that when the connecting tube is damaged, the connecting tube 120 can be disassembled and replaced with a new one, without having to discard the entire flow diverter body 100, thereby reducing the use cost of the flow diverter body 100.

[0059] A first liquid outlet 130 is also provided on the top surface of the storage tank 110. In order to facilitate pouring the drainage liquid in the storage tank 110 to the outside of the storage tank 110, the first liquid outlet 130 can be an opening provided on the top surface, or can be other structures. For example, a liquid outlet column extending along the axial direction of the storage tank is provided on the top surface of the storage tank 110, and a through hole is provided on the liquid outlet column. The through hole is connected to the inner cavity of the storage tank 110, and the through hole constitutes the first liquid outlet 130.

[0060] In order to achieve the blocking of the first liquid outlet 130, a first screw plug 140 may be provided on the first liquid outlet 130 to prevent the drainage liquid in the storage tank 110 from spilling. For example, the first screw plug 140 may be a stud, an internal thread may be formed on the inner surface of the first liquid outlet 130, and an external thread may be formed on the outer surface of the first screw plug 140. The first liquid outlet 130 and the first screw plug 140 are connected by threads to achieve a detachable connection between the first liquid outlet 130 and the first screw plug 140. For another example, the first screw plug 140 is a stud with a receiving hole. In this case, an internal thread may be formed on the inner surface of the receiving hole of the first screw plug 140, and an external thread may be formed on the outer surface of the liquid outlet column, and the first screw plug 140 may be threadedly connected to the liquid outlet column.

[0061] In the related art, the first screw plug 140 and the first liquid outlet 130 are only fitted by interference fit. Thus, during use, the patient can easily pull the first screw plug 140 out of the first liquid outlet 130, causing the drainage fluid in the storage tank 110 to spill, thereby increasing the risk of infection between the patient and medical staff.

[0062] The present invention utilizes a threaded connection to increase the connection strength between the first liquid outlet 130 and the first screw plug 140, thereby preventing the drainage fluid in the storage tank 110 from spilling and reducing the risk of infection between patients and medical staff.

[0063] In some embodiments, Figure 1 As shown, the bottom surface of the storage tank 110 is an inclined surface; the inclined surface is perpendicular to the axis of the storage tank, and the inclined surface has a first end and a second end. The distance from the first end to the top surface is smaller than the distance from the second end to the top surface, so that the storage tank is higher on the left and lower on the right. Due to the effect of gravity, the drainage fluid will flow to the lowest end of the storage tank. At this time, a second liquid outlet 150 is provided at a position close to the second end of the inclined surface, which can quickly drain the drainage fluid in the storage tank 110 to the outside of the storage tank 110. Compared with the technical solution in the related art that the drainage fluid needs to be drained to the outside of the storage tank 110 through the first liquid outlet 130, on the one hand, the drainage fluid in the storage tank 110 can be quickly drained out. On the other hand, it can prevent the drainage fluid from sticking to the corrugated grooves on the side, thereby increasing the total amount of drainage fluid drained to the outside, which is convenient for the subsequent statistics of the total amount of drainage fluid. Figure 1 Taking the orientation shown as an example, the first end is the left end of the inclined surface, and the second end is the right end of the inclined surface.

[0064] In order to achieve the blocking of the second liquid outlet 150, a second screw plug 160 can be set on the second liquid outlet 150. For example, the second screw plug 160 can be a stud, and an internal thread can be formed on the inner surface of the second liquid outlet 150, and an external thread can be formed on the outer surface of the second screw plug 160. The second liquid outlet 150 and the second screw plug 160 are connected by a threaded connection to achieve a detachable connection between the second liquid outlet 150 and the second screw plug 160.

[0065] The drain body 100 also includes a connecting tube 120, which is used to connect the storage tank 110 and the connecting head 200 so as to draw the drainage fluid out of the patient's drainage tube. In order to control the flow of the drainage fluid, a flow regulator 170 can be set on the connecting tube 120, wherein the flow regulator 170 can be a flow regulator on a commonly used infusion pump.

[0066] The connecting tube 120 is usually flexible to a certain extent. During use, the connecting tube 120 is very easy to bend, which hinders the flow of drainage fluid. In the embodiment of the present invention, a transparent protective cover is set on the connecting tube 120 between the storage tank 110 and the flow regulator 170. The hardness of the transparent protective cover is greater than that of the connecting tube 120, which can provide a certain support for the connecting tube 120, prevent the connecting tube 120 from bending, and improve the fluidity of the drainage fluid. In addition, the flow of the drainage fluid in the connecting tube can be observed in real time through the transparent protective cover.

[0067] The negative pressure drainage device also includes a connector 200, such as Figure 2 As shown, the connector 200 includes a first connector 210 and a second connector 220 detachably connected to the first connector 210. The first connector 210 is used to connect to the drainage tube 120, and the first connector 210 has a first flow cavity, which is connected to the drainage tube; the second connector 220 has a second communication cavity connected to the first communication cavity, and the end of the second connector 220 away from the first connector 210 is connected to the drain body 100. The drainage fluid enters the drain body through the drainage tube, the first flow cavity and the second flow cavity in sequence.

[0068] The embodiment of the present invention sets the connector 200 as a first connector 210 and a second connector 220 detachably connected to the first connector 210. When the negative pressure drainer needs to be replaced, the second connector 220 of the negative pressure drainer in use is removed from the first connector 210, and then the second connector 220 of the new negative pressure drainer is installed on the first connector 210 of the negative pressure drainer in use. In this way, the negative pressure drainer can be replaced without the need for medical staff to use force to separate the connector and the connecting tube as in the related art. This improves the operating convenience while reducing the labor intensity of medical staff.

[0069] As an optional embodiment of the connector 200, the first connector 210 includes a first cylinder with openings at both ends, and the second connector 220 includes a second cylinder with openings at both ends. The inner cavity of the first cylinder constitutes a first connecting cavity, and the inner cavity of the second cylinder constitutes a second connecting cavity.

[0070] Continue to refer Figure 2 When the outer diameter of the first cylinder matches the inner diameter of the second cylinder, an external thread can be formed on the outer surface of the first cylinder, and an internal thread can be formed on the inner surface of the second cylinder, so that the first cylinder is threadedly connected to the second cylinder, thereby realizing a detachable connection between the first connector 210 and the second connector 220.

[0071] When the inner diameter of the first cylinder matches the outer diameter of the second cylinder, an internal thread can be formed on the inner surface of the first cylinder and an external thread can be formed on the outer surface of the second cylinder, so that the second cylinder is threadedly connected to the first cylinder, thereby realizing a detachable connection between the first connector and the second connector.

[0072] When replacing the negative pressure drain, first unscrew the second connector 220 of the negative pressure drain in use, so that the first connector 210 of the negative pressure drain in use is still connected to the drainage tube, then unscrew the first connector 210 of the new negative pressure drain, and finally thread the second connector 220 of the new negative pressure drain on the first connector 210 connected to the drainage tube. In this way, it is not necessary for medical staff to separate or install the connector 200 and the connecting tube 120 by force in the related art to achieve the replacement of the negative pressure drain, which improves the convenience of operation and reduces the labor intensity of medical staff.

[0073] The first barrel and the second barrel can be cylindrical or in other shapes. Figure 2 The first cylinder includes a first conical section 211 and a first straight pipe section 212 connected to the first conical section 211. The diameter of the upper end of the first conical section 211 is smaller than the diameter of the lower end, so that the first conical section presents a trapezoidal structure with small and large parts at the top and bottom, which is convenient for medical staff to quickly insert the first connecting head 210 into the drainage tube, reducing the labor intensity of medical staff.

[0074] At the same time, the second cylinder includes a second conical section 221 and a second straight pipe section 222 connected to the second conical section 221. The diameter of the upper end of the second conical section 221 is larger than the diameter of the lower end, so that the second conical section presents a trapezoidal structure with a larger upper part and a smaller lower part, which is convenient for medical staff to quickly insert the second connecting head 220 into the connecting pipe, thereby reducing the labor intensity of medical staff.

[0075] In addition to the above connection methods, the first connector 210 and the second connector 220 can also be connected in a plug-in manner, such as: Figure 3 As shown, the first connector 210 includes a first cylinder with openings at both ends, and the second connector 220 includes a second cylinder with openings at both ends. The first cylinder extends into the second cylinder, and the outer surface of the first cylinder and the inner surface of the second cylinder are interference fit.

[0076] In addition, the outer circumferential surface of the first cylinder protrudes outward to form a first annular protrusion 213, and the outer circumferential surface of the second cylinder protrudes outward to form a second annular protrusion 223. A plug-in column 214 is provided on the side of the first annular protrusion 213 close to the second annular protrusion 223, and a plug-in groove 224 that cooperates with the plug-in column 214 is provided on the side of the second annular protrusion 223 facing the first annular protrusion 213. The interference fit between the plug-in column 214 and the plug-in groove 224 is utilized to improve the connection strength between the first connector 210 and the second connector 220, thereby avoiding the first connector 210 and the second connector 220 from falling off during use.

[0077] The first annular protrusion 213 can be arranged at the connection between the first conical section 211 and the first straight pipe section 212, and the second annular protrusion 223 can be arranged on the outer surface of the second straight pipe section 222. In this embodiment, the first annular protrusion 213 is arranged at the connection between the first conical section 211 and the first straight pipe section 212, and is not arranged on the first straight pipe section 212. In this way, the length of the first straight pipe section 212 extending into the second straight pipe section 222 can be increased, thereby improving the connection strength between the first connector 210 and the second connector 220.

[0078] In some embodiments, in order to improve the connection strength between the first connector 210 and the second connector 220, a hook 300 is further provided on the second annular protrusion 223, and one end of the hook 300 away from the second annular protrusion 223 is engaged with the first annular protrusion 213. Figure 4 shown.

[0079] For example, Figure 5 As shown, the hook 300 may include a first section and a second section connected to the first section, wherein the first section and the second section are perpendicular to each other, and the lower surface of the second section is in contact with the upper surface of the first annular protrusion 213 to achieve a snap connection between the hook and the first annular protrusion 213.

[0080] There may be multiple hooks 300, which may be spaced apart along the circumferential direction of the second annular protrusion 223, thereby increasing the connection strength between the first connector 210 and the second connector 220. The number of hooks 300 may be two or three.

[0081] In another embodiment, Figure 6 As shown, after the first straight pipe section 212 extends into the second straight pipe section 222 , the first connector 210 and the second connector 220 are detachably connected by the hook 300 disposed on the second annular protrusion 223 .

[0082] Furthermore, in order to improve the sealing performance between the first connector 210 and the second connector 220, as shown in FIG. Figure 7As shown, an annular sealing groove 400 is provided on the side of the second annular protrusion 223 close to the first annular protrusion 213, and a sealing ring 500 is provided in the annular sealing groove 400. The sealing ring 500 is sealed and connected to the side of the first annular protrusion 213 toward the second annular protrusion 223. This can prevent the drainage fluid from overflowing and splashing onto medical staff or other personnel, thereby reducing the risk of cross infection and improving safety.

[0083] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0084] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A negative pressure drainage device, characterized in that: It comprises a flow guider body and a connector, wherein the connector comprises a first connector and a second connector detachably connected to the first connector; The first connector is used to connect to the drainage tube, and the first connector has a first flow cavity, and the first flow cavity is communicated with the drainage tube; The second connector has a second connecting cavity connected to the first connecting cavity, and an end of the second connector facing away from the first connector is connected to the flow guider body; The flow guider body comprises a storage tank, a connecting pipe connected to the storage tank, and a flow regulator arranged on the connecting pipe, and one end of the connecting pipe away from the storage tank is connected to the second connector; The connecting pipe sleeve is provided with a transparent protective cover, the transparent protective cover is located between the storage tank and the flow regulator, and the hardness of the transparent protective cover is greater than the hardness of the connecting pipe; the storage tank includes a top surface, a bottom surface, and a side surface connecting the top surface and the bottom surface, the connecting pipe is provided on the top surface, and a first liquid outlet is provided on the top surface, and a first screw plug is screwed on the first liquid outlet; The bottom surface of the storage tank is an inclined surface; the inclined surface is along a direction perpendicular to the axis of the storage tank, the inclined surface has a first end and a second end, the distance from the first end to the top surface is smaller than the distance from the second end to the top surface, a second liquid outlet is provided at a position of the inclined surface close to the second end, and a second screw plug is screwed to the second liquid outlet; The side surface of the storage tank is configured to be foldable and corrugated; A connection hole is arranged on the top surface of the storage tank, and the connection pipe is bonded in the connection hole.

2. The negative pressure drainage device according to claim 1, characterized in that: The first connector includes a first cylinder with openings at both ends, and an external thread is formed on the outer surface of the first cylinder; The second connector includes a second cylinder with openings at both ends, an internal thread is formed on the inner surface of the second cylinder, and the second connector is connected to the first connector through threads; The inner cavity of the first cylinder constitutes the first communicating cavity, and the inner cavity of the second cylinder constitutes the second communicating cavity.

3. The negative pressure drainage device according to claim 1, characterized in that: The first connector includes a first cylinder with openings at both ends, the second connector includes a second cylinder with openings at both ends, and the first cylinder extends into the second cylinder; The outer circumferential surface of the first cylinder protrudes outward to form a first annular protrusion, and the outer circumferential surface of the second cylinder protrudes outward to form a second annular protrusion. A plug-in column is provided on the side of the first annular protrusion close to the second annular protrusion, and a plug-in groove that cooperates with the plug-in column is provided on the side of the second annular protrusion facing the first annular protrusion.

4. The negative pressure drainage device according to claim 3, characterized in that: The first cylinder includes a first tapered section and a first straight pipe section connected to the first tapered section; the second cylinder includes a second tapered section and a second straight pipe section connected to the second tapered section; the first straight pipe section extends into the second straight pipe section; The first annular protrusion is arranged at the connection between the first conical section and the first straight pipe section; the second annular protrusion is arranged on the second straight pipe section.

5. The negative pressure drainage device according to claim 4, characterized in that: The second annular protrusion is also provided with a hook, and one end of the hook facing away from the second annular protrusion is engaged with the first annular protrusion.

6. The negative pressure drainage device according to claim 5, characterized in that: There are multiple hooks, and the multiple hooks are arranged at intervals along the circumferential direction of the second annular protrusion.

7. The negative pressure drainage device according to any one of claims 3 to 6, characterized in that: An annular sealing groove is provided on the side of the second annular protrusion close to the first annular protrusion. A sealing ring is provided in the annular sealing groove. The sealing ring is sealingly connected to the side of the first annular protrusion facing the second annular protrusion.

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