Drainage device for medical surgical operation

Abstract

According to the technical scheme, the drainage device for the medical surgical operation is characterized by comprising a drainage bottle, the top of the drainage bottle is connected with a suction tube, and the suction tube is used for conducting suction operation in the surgical operation; the negative pressure cylinder is arranged below the drainage bottle, and the negative pressure cylinder is connected with the air pump through a pipeline; the pressure adjusting bag is arranged to be a flexible pressure adjusting bag, and the pressure adjusting bag is arranged in the negative pressure cylinder; one end of the air inlet pipe is communicated with the top of the drainage bottle, and the other end of the air inlet pipe penetrates through the negative pressure cylinder to be connected with the pressure adjusting bag; the collecting bag is arranged on one side of the negative pressure cylinder; and an air outlet pipe; through the arrangement of the pressure regulating bag and the collecting bag, gas mixed with pus, blood and the like can only enter the pressure regulating bag and is discharged into the collecting bag through extrusion after suction is finished, so that the gas is discharged after being disinfected, and the environment cannot be polluted.

Description

Technical Field

[0001] The present invention relates to the technical field of surgical drainage, and more particularly to a drainage device for medical surgical operations. Background Art

[0002] Surgery is the science that studies the occurrence, development, clinical manifestations, diagnosis, prevention and treatment of surgical diseases. It is a professional department that uses surgical resection and repair as the main means of treatment. It is a process in which surgical equipment or instruments, operated by surgeons or other professionals, enter the human body or other biological tissues to eliminate lesions, change structures or implant foreign objects by external force.

[0003] A drainage device is used during a surgical operation to guide pus, blood, liquid, etc. accumulated between human tissues or in body cavities to the outside of the body. When used, existing drainage devices mostly draw liquid into a suction bottle by means of negative pressure. However, in order to maintain the negative pressure in the suction bottle, some gas is drawn into the suction bottle during the suction process. In order to ensure the negative pressure state in the suction bottle, the gas in the suction bottle needs to be continuously sucked out. Most of the gas discharged from the suction bottle is discharged directly. However, since this part of the gas is mixed with pus, blood, etc., there is a great possibility that pathogens may exist therein, which may easily pollute the external environment. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a drainage device for medical surgical operations, which, through the provision of a pressure regulating bag and a collecting bag, allows gases mixed with pus, blood, etc. to only enter the pressure regulating bag and be extruded and discharged into the collecting bag for collection after the suction is completed, so that they can be discharged after being sterilized, thereby not causing pollution to the environment.

[0005] To achieve the above object, the present invention provides the following technical solution: a drainage device for medical surgical operation, comprising a drainage bottle, the top of which is connected with a suction tube, the suction tube is used for suction operation during surgical operation; A negative pressure cylinder, which is arranged below the drainage bottle and connected to the air pump through a pipeline; A pressure regulating bag, wherein the pressure regulating bag is configured as a flexible pressure regulating bag and the pressure regulating bag is disposed in a negative pressure cylinder; An air inlet pipe, one end of which is connected to the top of the drainage bottle, and the other end of which passes through the negative pressure cylinder and is connected to the pressure regulating bag; A collecting bag, wherein the collecting bag is arranged on one side of the negative pressure cylinder; and an air outlet pipe, one end of which extends into the negative pressure cylinder and is connected to the pressure regulating bag, and the other end of which extends out of the negative pressure cylinder and is connected to the collecting bag; The air inlet pipe is provided with a one-way valve that only allows gas to flow into the pressure regulating bag, and the air outlet pipe is provided with a one-way valve that only allows gas to flow out of the pressure regulating bag.

[0006] The present invention is further configured as follows: the suction tube and the air intake tube are connected to the drainage bottle via a first connecting mechanism; Two first connecting holes are arranged on the top of the drainage bottle, and two first connecting mechanisms are arranged in the two first connecting holes respectively.

[0007] The present invention is further configured as follows: the first connection mechanism includes a first connection plug, the first connection plug is inserted into the corresponding first connection hole, the first connection plug is provided with a first receiving hole at the bottom, the first receiving hole is provided with a clearance hole penetrating upward through the first connection plug at the top, and the diameter of the clearance hole is smaller than the diameter of the first receiving hole; A first elastic member, wherein the first elastic member is disposed in the first receiving hole and a top of the first elastic member is fixedly connected to a hole wall at the top of the first receiving hole; A first sealing plate, wherein the first sealing plate is fixedly connected to the bottom of the first elastic member, and the first sealing plate is pressed against the bottom of the first connecting plug under the action of the first elastic member to seal the first receiving hole; A sealing plug, the sealing plug being inserted into the clearance hole; And a first connecting tube, the first connecting tube vertically passes through the sealing plug, the first connecting tube can push the first sealing plate downward to disengage from the first connecting plug, and a plurality of connecting holes penetrating the outer wall of the first connecting tube are arranged on the outer side of the bottom of the first connecting tube.

[0008] The present invention is further configured as follows: the air inlet pipe and the air outlet pipe are connected to the pressure regulating bag via two second connecting mechanisms respectively; The top of the negative pressure cylinder is provided with two second connecting holes, and the two second connecting mechanisms are respectively arranged at the two second connecting holes.

[0009] The present invention is further configured as follows: the second connection mechanism comprises a second connection plug, and the second connection plug is inserted into the corresponding second connection hole; A fixed pipe, the fixed pipe is fixedly connected to the pressure regulating bag and communicated with the pressure regulating bag; A connecting block, the connecting block is fixedly connected to the top of the fixed pipe; A connecting sleeve, which is used to detachably connect the connecting block and the second connecting plug; And a second connecting tube, the second connecting tube is fixedly connected to the second connecting plug and vertically passes through the second connecting plug. When the connecting block and the second connecting plug are fixedly connected together through the connecting sleeve, the second connecting tube passes through the connecting block and extends into the fixed tube. The end of the second connecting tube located outside the negative pressure cylinder is connected to the air inlet pipe or the air outlet pipe.

[0010] The present invention is further configured as follows: the connecting sleeve is arranged outside the connecting block, the connecting sleeve is fixedly connected to a limiting ring close to one side of the fixed pipe, 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.

[0011] The present invention is further configured as follows: the second connection mechanism further comprises a second sealing plate, a second receiving hole is provided at the bottom of the connection block, a second elastic member is provided in the second receiving hole, the second sealing plate is fixedly connected to the bottom of the second elastic member and can be pressed against the bottom of the connection block under the action of the second elastic member to seal the second receiving hole; When the second connecting plug is connected to the connecting block, the second connecting pipe pushes the second sealing plate downward to separate from the connecting block. A plurality of connecting holes penetrating the side wall of the second connecting pipe are also arranged on the outer side of the bottom of the second connecting pipe.

[0012] The present invention is further configured as follows: a collecting pipe is fixedly connected to the front end of the collecting bag, and the collecting pipe is connected to the air outlet pipe through a third connecting pipe.

[0013] The present invention is further configured as follows: a plurality of collecting bags are provided, and the plurality of collecting bags are connected together via a third connecting mechanism.

[0014] The present invention is further configured as follows: the third connection mechanism includes a connection seat, the connection seat is fixedly connected to an end of the collection bag away from the collection tube, a control cavity is arranged in the connection seat, and an end of the control cavity close to the collection bag is provided with a control hole connected to the collection bag, and the diameter of the control hole is smaller than the diameter of the control cavity; A fourth connecting pipe, which is fixedly connected to a side of the connecting seat away from the collecting bag and communicates with the control chamber, and a collecting pipe of an adjacent collecting bag can be sleeved on the fourth connecting pipe; A third sealing plate, the third sealing plate is disposed in the control cavity and has a diameter smaller than the diameter of the control cavity and larger than the diameter of the control hole; And a third elastic member, one end of the third elastic member is fixedly connected to the inner wall of the control chamber away from the collecting bag, and the other end is fixedly connected to the third sealing plate. Under the elastic force of the third elastic member, the third sealing plate is pressed against the side of the control chamber close to the collecting bag to close the control chamber.

[0015] In summary, compared with the prior art, the present invention has the following beneficial effects: through the provision of a pressure regulating bag and a collecting bag, the present invention ensures that the gas mixed with pus, blood, etc. will only enter the pressure regulating bag and be discharged into the collecting bag through squeezing after the suction is completed, so that it can be discharged after disinfection, thereby not causing pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of an embodiment; Figure 2 is a cross-sectional view of a drainage bottle of an embodiment; Figure 3 for Figure 2 A magnified schematic diagram of part A; Figure 4 is a cross-sectional view of the negative pressure cylinder of the embodiment; Figure 5 for Figure 4 A magnified schematic diagram of part B; Figure 6 is a cross-sectional view of a collecting bag of an embodiment; Figure 7 for Figure 6 An enlarged schematic diagram of the C portion; Figure 8 for Figure 6 An enlarged schematic diagram of part D of FIG.

[0017] In the figure: 1, drainage bottle; 11, first connecting hole; 2, negative pressure cylinder; 21, second connecting hole; 3, pressure regulating bag; 4, collecting bag; 41, collecting tube; 42, third connecting tube; 51, suction tube; 52, air inlet pipe; 53, air outlet pipe; 6, first connecting mechanism; 61, first connecting plug; 611, first accommodating hole; 612, make way hole; 62, sealing plug; 63, first connecting tube; 64, first elastic member; 65, first sealing plate; 7, second connecting mechanism; 71, second connecting plug; 72, second connecting tube; 73, connecting block; 731, second accommodating hole; 74, fixing tube; 75, connecting sleeve; 751, limiting ring; 76, second elastic member; 77, second sealing plate; 8, third connecting mechanism; 81, connecting seat; 811, control chamber; 812, control hole; 82, third sealing plate; 83, third elastic member; 84, fourth connecting tube. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is clearly and completely described below in conjunction with the accompanying drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by ordinary technicians in this field without making creative work should all fall within the scope of protection of this application. In addition, the directional words mentioned in the following embodiments, such as "up", "down", "left", "right", etc., are only reference to the directions of the accompanying drawings. Therefore, the directional words used are used to illustrate rather than limit the invention.

[0019] The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

[0020] Embodiment: A drainage device for medical surgery, see attached Figure 1 -Attached Figure 8, including a drainage bottle 1, a negative pressure cylinder 2, a pressure regulating bag 3, an air inlet pipe 52, a collecting bag 4 and an air outlet pipe 53, wherein the top of the drainage bottle 1 is connected with a suction tube 51, and the suction tube 51 is used for suction operation during surgical operation; the negative pressure cylinder 2 is arranged below the drainage bottle 1, and the negative pressure cylinder 2 is connected to the air pump through a pipeline; the pressure regulating bag 3 is arranged as a flexible pressure regulating bag 3, and the pressure regulating bag 3 is arranged in the negative pressure cylinder 2; one end of the air inlet pipe 52 is connected with the top of the drainage bottle 1, and the other end passes through the negative pressure cylinder 2 and is connected with the pressure regulating bag 3; the collecting bag 4 is arranged 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 is connected with the pressure regulating bag 3, and the other end extends out of the negative pressure cylinder 2 and is connected with the collecting bag 4; the air inlet pipe 52 is provided with a one-way valve that only allows gas to flow into the pressure regulating bag 3, and the air outlet pipe 53 is provided with a one-way valve that only allows gas to flow out of the pressure regulating bag 3.

[0021] When in use, the air in the negative pressure cylinder 2 is extracted by the air pump, thereby forming a negative pressure in the negative pressure cylinder 2. The negative pressure formed in the negative pressure cylinder 2 will drive the volume of the pressure regulating bag 3 to expand, thereby forming a negative pressure in the pressure regulating bag 3, and then drive the formation of negative pressure in the drainage bottle 1, so that the liquid is drained into the drainage bottle 1 through the suction tube 51; and when the suction is completed or the air pressure in the pressure regulating bag 3 is balanced, the air is rushed into the negative pressure cylinder 2 by the air pump, and the gas in the pressure regulating bag 3 is discharged into the collection bag 4 through the air squeezing push rod, and then the gas in the negative pressure cylinder 2 is extracted again to form a negative pressure for drainage. During the suction process, the gas mixed with pus, blood, etc. will only enter the pressure regulating bag 3 and be extruded and discharged to the collection bag 4 for collection after the suction is completed, so that it can be discharged after disinfection, thereby not causing pollution to the environment.

[0022] Specifically, the suction tube 51 and the air inlet tube 52 are connected to the drainage bottle 1 via a first connecting mechanism 6 ; two first connecting holes 11 are provided on the top of the drainage bottle 1 , and the two first connecting mechanisms 6 are respectively provided in the two first connecting holes 11 .

[0023] Specifically, the first connecting mechanism 6 includes a first connecting plug 61, a first elastic member 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 first connecting plug 61 is provided with a first receiving hole 611 at the bottom. The first receiving hole 611 is provided with a clearance hole 612 that penetrates the first connecting plug 61 upward at the top. The diameter of the clearance hole 612 is smaller than the diameter of the first receiving hole 611. The first elastic member 64 is provided in the first receiving hole 611 and the top of the first elastic member 64 is fixedly connected to the first receiving hole. 611 is on the hole wall at the top; 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 accommodating hole 611; the sealing plug 62 is inserted into the clearance hole 612; the first connecting tube 63 vertically passes through the sealing plug 62, and the first connecting tube 63 can push the first sealing plate 65 downward to disengage from the first connecting plug 61, and a plurality of connecting holes penetrating the outer wall of the first connecting tube 63 are arranged on the outer side of the bottom of the first connecting tube 63, and the first connecting tube 63 is fixedly connected to the sealing plug 62.

[0024] When the sealing plug 62 is not connected to the drainage bottle 1, under the action of the elastic member, the first sealing plate 65 is pressed against the bottom of the first connecting plug 61 to seal the drainage bottle 1; when the sealing plug 62 is inserted into the clearance hole 612, the first connecting tube 63 pushes the first sealing plate 65 downward to disengage from the first connecting plug 61, so that the drainage bottle 1 is connected to 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 intake tube 52 respectively.

[0025] 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; two second connecting holes 21 are arranged on the top of the negative pressure cylinder 2, and the two second connecting mechanisms 7 are arranged at the two second connecting holes 21 respectively.

[0026] 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, wherein 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 is communicated 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 vertically passes 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. The 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.

[0027] By providing the second connecting plug 71 and the connecting block 73 , the pressure regulating bag 3 can be disassembled for replacement or disinfection.

[0028] Specifically, the connecting sleeve 75 is sleeved outside the connecting block 73, and the connecting sleeve 75 is fixedly connected to a limiting ring 751 on one side close to the fixed pipe 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 to the second connecting plug 71.

[0029] Specifically, the second connecting mechanism 7 also includes a second sealing plate 77, a second accommodating hole 731 is provided at the bottom of the connecting block 73, a second elastic member 76 is provided in the second accommodating hole 731, the second sealing plate 77 is fixedly connected to the bottom of the second elastic member 76 and can be pressed against the bottom of the connecting block 73 under the action of the second elastic member 76 to seal the second accommodating 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 separate from the connecting block 73, and a plurality of connecting holes penetrating the side wall of the second connecting tube 72 are also provided on the outer side of the bottom of the second connecting tube 72.

[0030] When the connecting block 73 and the second connecting plug 71 are not connected together, under the action of the second elastic member 76, the second sealing plate 77 is pressed against the bottom of the connecting block 73 to close the second receiving hole 731, thereby sealing the pressure regulating bag 3; and when the connecting block 73 and the second connecting plug 71 are connected together, the second connecting pipe 72 pushes the second sealing plate 77 downward to separate from the connecting block 73, so that the pressure regulating bag 3 is connected to the outside through the second connecting pipe 72; the air inlet pipe 52 and the air outlet pipe 53 are respectively connected to one end of the two second connecting pipes 72 extending out of the negative pressure cylinder 2. .

[0031] Specifically, a collection pipe 41 is fixedly connected to the front end of the collection bag 4 , and the collection pipe 41 is connected to the air outlet pipe 53 via a third connecting pipe 42 .

[0032] Specifically, a plurality of collecting bags 4 are provided, and the plurality of collecting bags 4 are connected together via a third connecting mechanism 8 .

[0033] 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 member 83. The connecting seat 81 is fixedly connected to the end of the collecting bag 4 away from the collecting pipe 41. A control cavity 811 is arranged in the connecting seat 81. The end of the control cavity 811 close to the collecting bag 4 is provided with a control hole 812 connected to the collecting 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 collecting bag 4 and is connected to the control cavity 811. 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 arranged in the control cavity 811 and has a diameter 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, and the third sealing plate 82 is pressed against the side of the control cavity 811 close to the collection bag 4 under the elastic force of the third elastic member 83 to close the control cavity.

[0034] The plurality of collecting bags 4 are arranged in a gradually increasing order from close to the air outlet pipe 53 to away from the air outlet pipe 53. After the low-ordered collecting bag 4 is fully filled with gas, the air pressure will increase. When the third elastic member 83 is compressed under the push of the air pressure, the third sealing plate 82 is separated from the inner wall of the control chamber 811, so that the gas in the low-ordered collecting bag 4 can enter the next collecting bag 4 through the control hole 812, and the gas is collected by the next collecting bag 4.

[0035] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A drainage device for medical surgery, characterized in that: It comprises a drainage bottle (1), the top of which is connected to a suction tube (51), and the suction tube (51) is used for suction operation during surgical operation; A negative pressure cylinder (2), wherein the negative pressure cylinder (2) is arranged below the drainage bottle (1), and the negative pressure cylinder (2) is connected to an air pump via a pipeline; A pressure regulating bag (3), wherein the pressure regulating bag (3) is configured as a flexible pressure regulating bag (3), and the pressure regulating bag (3) is arranged in the negative pressure cylinder (2); An air inlet pipe (52), one end of which is in communication with the top of the drainage bottle (1), and the other end of which passes through the negative pressure cylinder (2) and is connected to the pressure regulating bag (3); A collecting bag (4), wherein the collecting bag (4) is arranged on one side of the negative pressure cylinder (2); and an air outlet pipe (53), one end of which extends into the negative pressure cylinder (2) and is connected to the pressure regulating bag (3), and the other end of which extends out of the negative pressure cylinder (2) and is connected to the collecting bag (4); The air inlet pipe (52) is provided with a one-way valve that only allows gas to flow into the pressure regulating bag (3), and the air outlet pipe (53) is provided with a one-way valve that only allows gas to flow out of the pressure regulating bag (3).

2. A drainage device for medical surgery according to claim 1, characterized in that: The suction tube (51) and the air intake tube (52) are connected to the drainage bottle (1) via a first connecting mechanism (6); Two first connection holes (11) are arranged on the top of the drainage bottle (1), and the two first connection mechanisms (6) are respectively arranged in the two first connection holes (11).

3. A drainage device for medical surgery according to claim 2, characterized in that: The first connecting mechanism (6) comprises a first connecting plug (61), the first connecting plug (61) being inserted into the corresponding first connecting hole (11), a first receiving hole (611) being arranged at the bottom of the first connecting plug (61), a clearance hole (612) penetrating upward through the first connecting plug (61) being arranged at the top of the first receiving hole (611), the diameter of the clearance hole (612) being smaller than the diameter of the first receiving hole (611); A first elastic member (64), wherein the first elastic member (64) is disposed in the first accommodating hole (611) and the top of the first elastic member (64) is fixedly connected to the hole wall at the top of the first accommodating hole (611); A first sealing plate (65), the first sealing plate (65) being fixedly connected to the bottom of the first elastic member (64), and the first sealing plate (65) being 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); A sealing plug (62), wherein the sealing plug (62) is inserted into the clearance hole (612); and a first connecting tube (63), the first connecting tube (63) vertically passing through the sealing plug (62), the first connecting tube (63) being capable of pushing the first sealing plate (65) downward to separate from the first connecting plug (61), and a plurality of connecting holes penetrating the outer wall of the first connecting tube (63) being arranged on the outer side of the bottom of the first connecting tube (63).

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

5. A drainage device for medical surgery according to claim 4, characterized in that: The second connecting mechanism (7) comprises a second connecting plug (71), and the second connecting plug (71) is inserted into the corresponding second connecting hole (21); A fixed pipe (74), wherein the fixed pipe (74) is fixedly connected to the pressure regulating bag (3) and communicates with the pressure regulating bag (3); A connecting block (73), wherein the connecting block (73) is fixedly connected to the top of the fixed pipe (74); A connecting sleeve (75), wherein the connecting sleeve (75) is used to detachably connect the connecting block (73) and the second connecting plug (71); and a second connecting tube (72), wherein the second connecting tube (72) is fixedly connected to the second connecting plug (71) and vertically passes through the second connecting plug (71); when the connecting block (73) and the second connecting plug (71) are fixedly connected together via the connecting sleeve (75), the second connecting tube (72) passes through the connecting block (73) and extends into the fixed tube (74); and 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).

6. A drainage device for medical surgery according to claim 5, characterized in that: The connecting sleeve (75) is sleeved outside the connecting block (73); the connecting sleeve (75) is fixedly connected to a limiting ring (751) on one side close to the fixing pipe (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 to the second connecting plug (71).

7. A drainage device for medical surgery according to claim 6, characterized in that: The second connection mechanism (7) further comprises a second sealing plate (77); a second receiving hole (731) is provided at the bottom of the connection block (73); a second elastic member (76) is provided in the second receiving hole (731); the second sealing plate (77) is fixedly connected to the bottom of the second elastic member (76) and can be pressed against the bottom of the connection block (73) under the action of the second elastic member (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 separate from the connecting block (73), and a plurality of connecting holes penetrating the side wall of the second connecting tube (72) are also provided on the outer side of the bottom of the second connecting tube (72).

8. A drainage device for medical surgery according to claim 7, characterized in that: The front end of the collecting bag (4) is fixedly connected to a collecting pipe (41), and the collecting pipe (41) and the air outlet pipe (53) are connected together via a third connecting pipe (42).

9. A drainage device for medical surgery according to claim 8, characterized in that: A plurality of the collecting bags (4) are provided, and the plurality of collecting bags (4) are connected together via a third connecting mechanism (8).

10. A drainage device for medical surgery according to claim 9, characterized in that: The third connection mechanism (8) comprises a connection seat (81), the connection seat (81) being fixedly connected to an end of the collection bag (4) away from the collection tube (41), a control cavity (811) being arranged in the connection seat (81), and a control hole (812) communicating with the collection bag (4) being arranged at an end of the control cavity (811) close to the collection bag (4), the diameter of the control hole (812) being smaller than the diameter of the control cavity (811); a fourth connecting tube (84), the fourth connecting tube (84) being fixedly connected to a side of the connecting seat (81) away from the collecting bag (4) and being in communication with the control chamber (811), and the collecting tube (41) of the adjacent collecting bag (4) being capable of being sleeved on the fourth connecting tube (84); A third sealing plate (82), the third sealing plate (82) being disposed in the control cavity (811) and having a diameter smaller than the diameter of the control cavity (811) and larger than the diameter of the control hole (812); and a third elastic member (83), one end of the third elastic member (83) being fixedly connected to the inner wall of the control chamber (811) at one end away from the collecting bag (4), and the other end being fixedly connected to the third sealing plate (82); and the third sealing plate (82) is pressed against the side of the control chamber (811) close to the collecting bag (4) under the elastic force of the third elastic member (83) to seal the control chamber.

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