A drainage device for medical surgery

Abstract

This invention discloses a drainage device for medical surgery. The key technical features include a drainage bottle with a suction tube connected to its top for suction during surgery; a negative pressure cylinder positioned below the drainage bottle and connected to an air pump via a pipe; a pressure regulating bag, a flexible pressure regulating bag housed within the negative pressure cylinder; an air inlet pipe, one end of which connects to the top of the drainage bottle, and the other end passing through the negative pressure cylinder and connecting to the pressure regulating bag; a collection bag located on one side of the negative pressure cylinder; and an air outlet pipe. The design of the pressure regulating bag and collection bag ensures that gases mixed with pus, blood, etc., only enter the pressure regulating bag and are expelled into the collection bag after suction is complete. These gases are then disinfected before being discharged, preventing environmental pollution.

Description

Technical Field

[0001] This invention relates to the technical field of surgical drainage, and more specifically, to a drainage device for medical surgery. Background Technology

[0002] Surgery is the science that studies the occurrence, development, clinical manifestations, diagnosis, prevention, and treatment of surgical diseases. It is a specialized department that uses surgical resection and repair as the main means of treatment. Through surgical equipment or instruments, and under the operation of surgeons or other professionals, it is a process of removing lesions, altering structures, or implanting foreign objects by external force.

[0003] During surgical procedures, drainage devices are used to guide pus, blood, and fluid accumulated between body tissues or in body cavities out of the body. Most existing drainage devices use negative pressure to draw fluid into a suction bottle. However, in order to maintain the negative pressure inside the suction bottle, some gas is also drawn into the suction bottle during the suction process. To maintain the negative pressure inside the suction bottle, the gas needs to be continuously suctioned out. The gas discharged from the suction bottle is mostly discharged directly, but because this gas is mixed with pus and blood, there is a high possibility that it contains bacteria, which can easily lead to contamination of the external environment. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a drainage device for medical surgery. By setting up a pressure regulating bag and a collection bag, the gas mixed with pus, blood and other substances will only enter the pressure regulating bag and be squeezed out into the collection bag after the suction is completed. This allows for disinfection before discharge, thus preventing environmental pollution.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a drainage device for medical surgery, comprising a drainage bottle, wherein a suction tube is connected to the top of the drainage bottle, and the suction tube is used for suction operation during surgery;

[0006] A negative pressure cylinder is installed below the drainage bottle and connected to an air pump via a pipe.

[0007] A pressure regulating bag, wherein the pressure regulating bag is configured as a flexible pressure regulating bag and is disposed inside a negative pressure cylinder;

[0008] An air inlet pipe, one end of which is connected to the top of the drainage bottle, and the other end passes through the negative pressure cylinder and is connected to the pressure regulating bag;

[0009] A collection bag is disposed on one side of the negative pressure cylinder;

[0010] And an exhaust pipe, one end of which extends into the negative pressure cylinder and connects to the pressure regulating bag, and the other end extends out of the negative pressure cylinder and connects to the collection bag;

[0011] The inlet pipe is equipped with a one-way valve that allows only gas to flow into the pressure regulating bag, and the outlet pipe is equipped with a one-way valve that allows only gas to flow out of the pressure regulating bag.

[0012] The present invention is further configured such that: the suction tube and the air inlet tube are connected to the drainage bottle through a first connecting mechanism;

[0013] The top of the drainage bottle is provided with two first connection holes, and two first connection mechanisms are respectively installed in the two first connection holes.

[0014] The present invention is further configured such that: the first connecting mechanism includes a first connecting plug, the first connecting plug is inserted into a corresponding first connecting hole, the bottom of the first connecting plug is provided with a first receiving hole, the top of the first receiving hole is provided with a clearance hole that extends upward through the first connecting plug, and the diameter of the clearance hole is smaller than the diameter of the first receiving hole;

[0015] A first elastic element is disposed within a first receiving hole, and the top of the first elastic element is fixedly connected to the top wall of the first receiving hole.

[0016] A first sealing plate is fixedly connected to the bottom of a first elastic member. The first sealing plate is pressed against the bottom of a first connecting plug under the action of the first elastic member to seal the first receiving hole.

[0017] A sealing plug, which is inserted into a clearance hole;

[0018] And a first connecting tube, which passes vertically through the sealing plug. The first connecting tube can push the first sealing plate downward to separate from the first connecting plug. Several connecting holes penetrating the outer wall of the first connecting tube are provided on the outer side of the bottom of the first connecting tube.

[0019] The present invention is further configured such that: the air inlet pipe and the air outlet pipe are respectively connected to the pressure regulating bag through two second connecting mechanisms;

[0020] The negative pressure cylinder is provided with two second connection holes at the top, and two second connection mechanisms are respectively provided at the two second connection holes.

[0021] The present invention is further configured such that: the second connecting mechanism includes a second connecting plug, the second connecting plug being inserted into a corresponding second connecting hole;

[0022] A fixing tube is fixedly connected to the pressure regulating bag and communicates with the pressure regulating bag.

[0023] A connecting block, which is fixedly connected to the top of the fixed pipe;

[0024] A connecting sleeve, which is used to detachably connect the connecting block and the second connecting plug together;

[0025] And a second connecting pipe, which is fixedly connected to the second connecting plug and passes vertically through the second connecting plug. When the connecting block and the second connecting plug are fixedly connected together by the connecting sleeve, the second connecting pipe passes through the connecting block and extends into the fixed pipe. The end of the second connecting pipe located outside the negative pressure cylinder is connected to the air inlet pipe or the air outlet pipe.

[0026] The present invention is further configured such that: the connecting sleeve is sleeved outside the connecting block, a limiting ring is fixedly connected to the side of the connecting sleeve near the fixed tube, the inner diameter of the limiting ring is smaller than the diameter of the connecting block, and the connecting sleeve is threadedly connected to the second connecting plug.

[0027] The present invention is further configured such that: the second connecting mechanism further includes a second sealing plate, the bottom of the connecting block is provided with a second receiving hole, the second receiving hole is provided with a second elastic element, the second sealing plate is fixedly connected to the bottom of the second elastic element and can be pressed against the bottom of the connecting block under the action of the second elastic element to seal the second receiving hole;

[0028] When the second connecting plug is connected to the connecting block, the second connecting tube pushes the second sealing plate downward to disengage from the connecting block. Several connecting holes penetrating the side wall of the second connecting tube are also provided on the outer side of the bottom of the second connecting tube.

[0029] The present invention is further configured such that: a collection tube is fixedly connected to the front end of the collection bag, and the collection tube and the air outlet tube are connected together through a third connecting tube.

[0030] The present invention is further configured such that: multiple collection bags are provided, and the multiple collection bags are connected together by a third connecting mechanism.

[0031] The present invention is further configured such that: the third connecting mechanism includes a connecting seat, the connecting seat is fixedly connected to the end of the collection bag away from the collection tube, the connecting seat is provided with a control cavity, and the end of the control cavity near the collection bag is provided with a control hole communicating with the collection bag, the diameter of the control hole being smaller than the diameter of the control cavity;

[0032] The fourth connecting tube is fixedly connected to the side of the connecting seat away from the collection bag and communicates with the control cavity. The collection tube of the adjacent collection bag can be sleeved on the fourth connecting tube.

[0033] The third sealing plate is disposed in the control cavity and has a diameter smaller than the diameter of the control cavity but larger than the diameter of the control hole.

[0034] And a third elastic element, one end of which is fixedly connected to the inner wall of the control cavity away from the collection bag, and the other end is fixedly connected to the third sealing plate. The third sealing plate is pressed against the side of the control cavity near the collection bag under the elastic force of the third elastic element to seal the control cavity.

[0035] In summary, the present invention has the following advantages over the prior art: By setting up a pressure regulating bag and a collection bag, the present invention ensures that gases mixed with pus, blood, etc., only enter the pressure regulating bag and are discharged into the collection bag by squeezing after suction is completed, so that they can be discharged after disinfection, thereby avoiding environmental pollution. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0037] Figure 2 A cross-sectional view of the drainage bottle in this embodiment;

[0038] Figure 3 for Figure 2 Enlarged schematic diagram of part A;

[0039] Figure 4 This is a cross-sectional view of the negative pressure cylinder in the embodiment;

[0040] Figure 5 for Figure 4 Enlarged schematic diagram of part B;

[0041] Figure 6 A cross-sectional view of the collection bag in the embodiment;

[0042] Figure 7 for Figure 6 Enlarged schematic diagram of part C;

[0043] Figure 8 for Figure 6 Enlarged schematic diagram of part D.

[0044] In the diagram: 1. Drainage bottle; 11. First connecting hole; 2. Negative pressure cylinder; 21. Second connecting hole; 3. Pressure regulating bag; 4. Collection bag; 41. Collection tube; 42. Third connecting tube; 51. Suction tube; 52. Air inlet tube; 53. Air outlet tube; 6. First connecting mechanism; 61. First connecting plug; 611. First receiving hole; 612. Clearing hole; 62. Sealing plug; 63. First connecting tube; 64. First elastic element; 65. First sealing plate; 7. Second connecting mechanism; 71. Second connecting plug; 72. Second connecting tube; 73. Connecting block; 731. Second receiving hole; 74. Fixing tube; 75. Connecting sleeve; 751. Limiting ring; 76. Second elastic element; 77. Second sealing plate; 8. Third connecting mechanism; 81. Connecting seat; 811. Control cavity; 812. Control hole; 82. Third sealing plate; 83. Third elastic element; 84. Fourth connecting tube. Detailed Implementation

[0045] To enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments in this application, other similar embodiments obtained by those skilled in the art without creative effort should all fall within the scope of protection of this application. Furthermore, directional terms mentioned in the following embodiments, such as "up," "down," "left," and "right," are only for reference to the directions in the accompanying drawings; therefore, the directional terms used are for illustrative purposes and not for limiting the invention.

[0046] The present invention will be further described below with reference to the accompanying drawings and preferred embodiments.

[0047] Example: A drainage device for medical surgical procedures, see attached document. Figure 1 -Appendix Figure 8 The system includes a drainage bottle 1, a negative pressure cylinder 2, a pressure regulating bag 3, an air inlet pipe 52, a collection bag 4, and an air outlet pipe 53. The top of the drainage bottle 1 is connected to a suction tube 51, which is used for suction during surgical procedures. The negative pressure cylinder 2 is positioned below the drainage bottle 1 and is connected to an air pump via a pipe. The pressure regulating bag 3 is a flexible pressure regulating bag housed inside the negative pressure cylinder 2. One end of the air inlet pipe 52 is connected to the top of the drainage bottle 1, and the other end passes through the negative pressure cylinder 2 and connects to the pressure regulating bag 3. The collection bag 4 is located on one side of the negative pressure cylinder 2. One end of the air outlet pipe 53 extends into the negative pressure cylinder 2 and connects to the pressure regulating bag 3, while the other end extends out of the negative pressure cylinder 2 and connects to the collection bag 4. The air inlet pipe 52 is equipped with a one-way valve that allows only gas to flow into the pressure regulating bag 3, and the air outlet pipe 53 is equipped with a one-way valve that allows only gas to flow out of the pressure regulating bag 3.

[0048] During use, air is drawn from the negative pressure cylinder 2 by an air pump, creating a negative pressure within it. This negative pressure causes the volume of the pressure regulating bag 3 to expand, creating a negative pressure within the bag as well. This negative pressure then creates a negative pressure within the drainage bottle 1, allowing liquid to be drained into the bottle through the suction tube 51. When suction is complete or the pressure in the pressure regulating bag 3 reaches equilibrium, air is pumped back into the negative pressure cylinder 2. The air pressure pushes the rod, expelling the gas from the pressure regulating bag 3 into the collection bag 4. Then, air is drawn from the negative pressure cylinder 2 again to create negative pressure for drainage. During the suction process, any gas mixed with pus, blood, etc., only enters the pressure regulating bag 3 and is expelled into the collection bag 4 after suction is complete. This gas is then disinfected before being discharged, preventing environmental pollution.

[0049] Specifically, the suction tube 51 and the air inlet tube 52 are connected to the drainage bottle 1 through the first connecting mechanism 6; the top of the drainage bottle 1 is provided with two first connecting holes 11, and the two first connecting mechanisms 6 are respectively disposed in the two first connecting holes 11.

[0050] Specifically, the first connecting mechanism 6 includes a first connecting plug 61, a first elastic element 64, a first sealing plate 65, a sealing plug 62, and a first connecting tube 63. The first connecting plug 61 is inserted into the corresponding first connecting hole 11. The bottom of the first connecting plug 61 is provided with a first receiving hole 611, and the top of the first receiving hole 611 is provided with a clearance hole 612 that extends upward through the first connecting plug 61. The diameter of the clearance hole 612 is smaller than the diameter of the first receiving hole 611. The first elastic element 64 is disposed in the first receiving hole 611, and the top of the first elastic element 64 is fixedly connected to the first receiving hole. On the top of the hole wall of 611; the first sealing plate 65 is fixedly connected to the bottom of the first elastic member 64, and the first sealing plate 65 is pressed against the bottom of the first connecting plug 61 under the action of the first elastic member 64 to seal the first receiving hole 611; the sealing plug 62 is inserted into the relief hole 612; the first connecting tube 63 passes vertically through the sealing plug 62, and the first connecting tube 63 can push the first sealing plate 65 and the first connecting plug 61 to separate downwards. Several connecting holes penetrating the outer wall of the first connecting tube 63 are provided on the bottom outer side of the first connecting tube 63, and the first connecting tube 63 and the sealing plug 62 are fixedly connected together.

[0051] When the sealing plug 62 is not connected to the drainage bottle 1, the first sealing plate 65 is pressed against the bottom of the first connecting plug 61 under the action of the elastic element, sealing the drainage bottle 1; when the sealing plug 62 is inserted into the relief hole 612, the first connecting tube 63 pushes the first sealing plate 65 downward to disengage from the first connecting plug 61, thereby allowing the drainage bottle 1 to communicate with the outside through the first connecting tube 63. At this time, it is only necessary to connect the two first connecting tubes 63 of the two first connecting mechanisms 6 to the suction tube 51 and the air inlet tube 52 respectively.

[0052] The air inlet pipe 52 and the air outlet pipe 53 are respectively connected to the pressure regulating bag 3 through two second connecting mechanisms 7; the top of the negative pressure cylinder 2 is provided with two second connecting holes 21, and the two second connecting mechanisms 7 are respectively located at the two second connecting holes 21.

[0053] Specifically, the second connecting mechanism 7 includes a second connecting plug 71, a fixed tube 74, a connecting block 73, a connecting sleeve 75, and a second connecting tube 72. The second connecting plug 71 is inserted into the corresponding second connecting hole 21. The fixed tube 74 is fixedly connected to the pressure regulating bag 3 and communicates with the pressure regulating bag 3. The connecting block 73 is fixedly connected to the top of the fixed tube 74. The connecting sleeve 75 is used to detachably connect the connecting block 73 and the second connecting plug 71 together. The second connecting tube 72 is fixedly connected to the second connecting plug 71 and passes vertically through the second connecting plug 71. When the connecting block 73 and the second connecting plug 71 are fixedly connected together through the connecting sleeve 75, the second connecting tube 72 passes through the connecting block 73 and extends into the fixed tube 74. One end of the second connecting tube 72 located outside the negative pressure cylinder 2 is connected to the air inlet pipe 52 or the air outlet pipe 53.

[0054] The second connecting plug 71 and the connecting block 73 allow the pressure regulating bag 3 to be removed for replacement or disinfection.

[0055] Specifically, the connecting sleeve 75 is sleeved on the outside of the connecting block 73. A limiting ring 751 is fixedly connected to the side of the connecting sleeve 75 near the fixed tube 74. The inner diameter of the limiting ring 751 is smaller than the diameter of the connecting block 73. The connecting sleeve 75 is threadedly connected to the second connecting plug 71.

[0056] Specifically, the second connecting mechanism 7 also includes a second sealing plate 77. The bottom of the connecting block 73 is provided with a second receiving hole 731. A second elastic element 76 is provided in the second receiving hole 731. The second sealing plate 77 is fixedly connected to the bottom of the second elastic element 76 and can be pressed against the bottom of the connecting block 73 under the action of the second elastic element 76 to seal the second receiving hole 731. When the second connecting plug 71 is connected to the connecting block 73, the second connecting tube 72 pushes the second sealing plate 77 downward to disengage from the connecting block 73. The bottom outer side of the second connecting tube 72 is also provided with several through holes penetrating the side wall of the second connecting tube 72.

[0057] When the connecting block 73 and the second connecting plug 71 are not connected, under the action of the second elastic member 76, the second sealing plate 77 presses against the bottom of the connecting block 73 to close the second receiving hole 731, thus sealing the pressure regulating bag 3. When the connecting block 73 and the second connecting plug 71 are connected, the second connecting pipe 72 pushes the second sealing plate 77 downward to disengage from the connecting block 73, allowing the pressure regulating bag 3 to communicate with the outside through the second connecting pipe 72. The air inlet pipe 52 and the air outlet pipe 53 are respectively connected to the ends of the two second connecting pipes 72 that extend out of the negative pressure cylinder 2.

[0058] Specifically, a collection tube 41 is fixedly connected to the front end of the collection bag 4, and the collection tube 41 is connected to the air outlet pipe 53 through a third connecting tube 42.

[0059] Specifically, there are multiple collection bags 4, and the multiple collection bags 4 are connected together by a third connecting mechanism 8.

[0060] Specifically, the third connecting mechanism 8 includes a connecting seat 81, a fourth connecting pipe 84, a third sealing plate 82, and a third elastic element 83. The connecting seat 81 is fixedly connected to the end of the collection bag 4 away from the collection pipe 41. A control cavity 811 is provided inside the connecting seat 81. A control hole 812 communicating with the collection bag 4 is provided at the end of the control cavity 811 near the collection bag 4. The diameter of the control hole 812 is smaller than the diameter of the control cavity 811. The fourth connecting pipe 84 is fixedly connected to the side of the connecting seat 81 away from the collection bag 4 and communicates with the control hole 812. The cavity 811 is connected, and the collection tube 41 of the adjacent collection bag 4 can be sleeved on the fourth connecting tube 84; the third sealing plate 82 is set in the control cavity 811 and its diameter is smaller than the diameter of the control cavity 811 and larger than the diameter of the control hole 812; one end of the third elastic member 83 is fixedly connected to the inner wall of the control cavity 811 away from the collection bag 4, and the other end is fixedly connected to the third sealing plate 82. Under the elastic force of the third elastic member 83, the third sealing plate 82 is pressed against the side of the control cavity 811 near the collection bag 4 to seal the control cavity.

[0061] Multiple collection bags 4 are arranged in ascending order from near the exhaust pipe 53 to away from the exhaust pipe 53. After the lower-order collection bags 4 are filled with gas, the gas pressure will increase. When the third elastic member 83 is compressed under the push of the gas pressure, the third sealing plate 82 separates from the inner wall of the control cavity 811, so that the gas in the lower-order collection bags 4 can enter the next collection bag 4 through the control hole 812, and the next collection bag 4 will collect the gas.

[0062] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A medical surgical drainage device, characterized by: The device comprises a drainage bottle (1) with a suction tube (51) connected to the top of the drainage bottle (1) for suction during surgery; a negative pressure cylinder (2) arranged below the drainage bottle (1) and connected to a gas pump through a pipeline; a pressure regulating bag (3) arranged as a flexible pressure regulating bag (3) in the negative pressure cylinder (2); an air inlet pipe (52) with one end communicating with the top of the drainage bottle (1) and the other end penetrating the negative pressure cylinder (2) and connected to the pressure regulating bag (3); a collection bag (4) arranged on one side of the negative pressure cylinder (2); and an air outlet pipe (53) with one end extending into the negative pressure cylinder (2) and connected to the pressure regulating bag (3) and the other end extending out of the negative pressure cylinder (2) and connected to the collection bag (4); The air inlet pipe (52) is provided with a one-way valve allowing gas to flow into the pressure regulating bag (3) only, and the air outlet pipe (53) is provided with a one-way valve allowing gas to flow out of the pressure regulating bag (3) only.

2. A surgical drainage device according to claim 1, wherein: The suction tube (51) and the air inlet pipe (52) are connected to the drainage bottle (1) through a first connecting mechanism (6); The top of the drainage bottle (1) is provided with two first connecting holes (11), and two first connecting mechanisms (6) are arranged in the two first connecting holes (11), respectively.

3. A surgical drainage device according to claim 2, wherein: The first connecting mechanism (6) comprises a first connecting plug (61) inserted into the corresponding first connecting hole (11), a first accommodating hole (611) arranged at the bottom of the first connecting plug (61), a clearance hole (612) arranged at the top of the first accommodating hole (611) and penetrating the first connecting plug (61) upward, the diameter of the clearance hole (612) being smaller than that of the first accommodating hole (611); a first elastic member (64) arranged in the first accommodating hole (611) and fixedly connected to the hole wall at the top of the first accommodating hole (611); a first sealing plate (65) fixedly connected to the bottom of the first elastic member (64) and pressed against the bottom of the first connecting plug (61) to seal the first accommodating hole (611) under the action of the first elastic member (64); a sealing plug (62) inserted into the clearance hole (612); and a first connecting pipe (63) vertically penetrating the sealing plug (62), the first connecting pipe (63) being capable of pushing the first sealing plate (65) downward to disengage from the first connecting plug (61), and the bottom outer side of the first connecting pipe (63) being provided with a plurality of communication holes penetrating the outer wall of the first connecting pipe (63).

4. A surgical drainage device according to claim 3, wherein: The air inlet pipe (52) and the air outlet pipe (53) are connected to the pressure regulating bag (3) through two second connecting mechanisms (7), respectively; The top of the negative pressure cylinder (2) is provided with two second connecting holes (21), and two second connecting mechanisms (7) are arranged at the two second connecting holes (21), respectively.

5. A surgical drainage device according to claim 4, wherein: The second connecting mechanism (7) comprises a second connecting plug (71) inserted into a corresponding second connecting hole (21); A fixed tube (74) fixedly connected to the pressure regulating bag (3) and communicating with the pressure regulating bag (3); A connecting block (73) fixedly connected to the top of the fixed tube (74); A connecting sleeve (75) used for detachably connecting the connecting block (73) and the second connecting plug (71) together; and a second connecting tube (72) fixedly connected to the second connecting plug (71) and vertically penetrating the second connecting plug (71), when the connecting block (73) and the second connecting plug (71) are fixedly connected together through the connecting sleeve (75), the second connecting tube (72) penetrates into the fixed tube (74) through the connecting block (73), and the end of the second connecting tube (72) located outside the negative pressure cylinder (2) is connected with the air inlet tube (52) or the air outlet tube (53).

6. A surgical drainage device according to claim 5, wherein: The connecting sleeve (75) is sleeved outside the connecting block (73), the connecting sleeve (75) is fixedly connected to a limiting ring (751) on the side close to the fixed tube (74), the inner diameter of the limiting ring (751) is smaller than the diameter of the connecting block (73), and the connecting sleeve (75) is threadedly connected with the second connecting plug (71).

7. A surgical drainage device according to claim 6, wherein: The second connecting mechanism (7) further comprises a second sealing plate (77), the bottom of the connecting block (73) is provided with a second accommodating hole (731), the second accommodating hole (731) is provided with a second elastic element (76) therein, and the second sealing plate (77) is fixedly connected to the bottom of the second elastic element (76) and can be pressed against the bottom of the connecting block (73) under the action of the second elastic element (76) to seal the second accommodating hole (731); When the second connecting plug (71) is connected with the connecting block (73), the second connecting tube (72) pushes the second sealing plate (77) downward to separate from the connecting block (73), and the bottom outer side of the second connecting tube (72) is also provided with a plurality of communication holes penetrating the side wall of the second connecting tube (72).

8. A surgical drainage device according to claim 7, wherein: The front end of the collecting bag (4) is fixedly connected with a collecting tube (41), and the collecting tube (41) is connected with the air outlet tube (53) through a third connecting tube (42).

9. A surgical drainage device according to claim 8, wherein: A plurality of collecting bags (4) are provided, and the plurality of collecting bags (4) are connected together through a third connecting mechanism (8).

10. A surgical drainage device according to claim 9, wherein: The third connecting mechanism (8) comprises a connecting seat (81) fixedly connected to the end of the collecting bag (4) away from the collecting tube (41), the connecting seat (81) is provided with a control cavity (811) therein, the control cavity (811) is provided with a control hole (812) communicating with the collecting bag (4) on the end close to the collecting bag (4), and the diameter of the control hole (812) is smaller than the diameter of the control cavity (811); A fourth connecting pipe (84) is fixedly connected to the connecting seat (81) on the side away from the collecting bag (4) and communicates with the control cavity (811), and the collecting pipe (41) of the adjacent collecting bag (4) can be sleeved on the fourth connecting pipe (84); A third sealing plate (82) is arranged in the control cavity (811) and has a diameter smaller than that of the control cavity (811) and larger than that of the control hole (812); and a third elastic member (83) is fixedly connected at one end to the inner wall of the control cavity (811) on the side away from the collecting bag (4) and at the other end to the third sealing plate (82), and the third sealing plate (82) is pressed against the side of the control cavity (811) close to the collecting bag (4) under the elastic force of the third elastic member (83) to close the control hole.

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