Clinical hydrops treatment device for neurosurgery department

Abstract

The invention belongs to the technical field of medical equipment, and discloses a neurosurgical clinical effusion treatment device which comprises a base, an effusion cavity and a effusion storage bottle, the base is connected with a motor, a first suction assembly and a second suction assembly, an output shaft of the motor is connected with a center gear, a first piston rod of the first suction assembly is connected with a first rack, and a second piston rod of the second suction assembly is connected with a second rack. A second piston rod of the second suction assembly is connected with a second rack, the hydrops cavity communicates with a drainage main pipe, the drainage main pipe is connected with a drainage pipe, the drainage pipe communicates with a drainage head, the drainage pipe is rotationally provided with a rotating head, the drainage head and the rotating head are both provided with side holes, and the second suction assembly is connected with the rotating head through an air guide pipe to drive the rotating head to rotate. The first suction assembly is used for extracting hydrops, and the second suction assembly is used for driving the rotating head arranged on the outer side of the drainage head in a sleeving mode to rotate; the whole device is simple and compact in structure, the pressure in the effusion extraction process is constant and controllable, and the effusion drainage effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and particularly to a device for treating fluid accumulation in neurosurgical clinics. Background Art

[0002] As an important branch of surgery, neurosurgery focuses on using unique neurosurgical research methods to study and treat various diseases of the human nervous system (including the brain, spinal cord, and peripheral nervous system) and its related accessory structures (such as the skull, scalp, cerebral blood vessels, meninges, etc.), such as injuries, inflammations, tumors, deformities, and certain genetic metabolic disorders or functional disorders. In neurosurgical operations, a large amount of fluids such as blood and pus often accumulate at the postoperative wound, and these fluids need to be drained in a timely manner.

[0003] Currently, the treatment of fluid accumulation in neurosurgical clinics mainly relies on a negative pressure device for liquid suction. However, the drainage device with negative pressure control is difficult to maintain a constant pressure, and the internal tissues of the brain are relatively delicate, and excessive negative pressure is likely to cause damage to the brain tissue; moreover, due to the fluid accumulation being too viscous or containing debris, blockage is inevitably generated during drainage, which not only requires frequent replacement of the drainage tube, increasing the pain and discomfort of the patient, but also prolongs the treatment time and slows down the patient's recovery process. And simply using a relatively large-diameter flexible tube for negative pressure suction will cause the fluid accumulation to flow back, resulting in poor drainage effect of the fluid accumulation; in addition, the existing negative pressure devices are large in volume and high in cost, bringing a relatively large economic burden to the patient. Summary of the Invention

[0004] The present invention aims to provide a device for treating fluid accumulation in neurosurgical clinics. The whole device has a simple and compact structure, low cost, and is easy for patients to accept; it is provided with a first suction assembly and a second assembly, and when the central gear rotates driven by a motor, the air extraction and / or exhaust states of the first suction assembly and the second assembly are opposite. The first suction assembly extracts the fluid accumulation, and the pressure during the extraction process is constant and controllable; the second suction assembly drives a rotating head sleeved outside the drainage head to rotate, avoiding blockage of the side holes (drainage holes) of the drainage head, and ensuring the treatment effect of the fluid accumulation; thus solving the problems in the background art.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A fluid accumulation treatment device in neurosurgical clinics, comprising a base, a fluid accumulation chamber and a liquid storage bottle. The base is connected with a motor, a first suction assembly and a second suction assembly. The output shaft of the motor is fixedly connected with a central gear. The first suction assembly is provided with a first piston rod, and the first piston rod is fixedly connected with a first rack. The second suction assembly is provided with a second piston rod, and the second piston rod is fixedly connected with a second rack. The first rack and the second rack are respectively externally meshed on the upper and lower sides of the central gear, and both the first rack and the second rack are slidably connected with the base. When the central gear rotates, the air suction and / or exhaust states of the first suction assembly and the second suction assembly are opposite. The suction port of the first suction assembly is communicated with the fluid accumulation chamber through a first air duct. The liquid storage bottle is communicated with the fluid accumulation chamber, and the fluid accumulation chamber is also communicated with a main drainage pipe. The main drainage pipe is detachably connected with a drainage pipe, and the drainage pipe is communicated with a drainage head. A rotating head is rotatably arranged on the outer side of the drainage pipe. The rotating head is rotatably sleeved on the outer side of the drainage head, and a plurality of side holes are formed in both the drainage head and the rotating head. The suction port of the second suction assembly is connected with the rotating head through an air duct for driving the rotation of the rotating head.

[0007] Further, both the rotating head and the drainage head are three-quarter spheres, and the diameter of the side holes formed in the spherical surface of the rotating head is not less than the diameter of the side holes formed in the spherical surface of the drainage head.

[0008] Further, the suction port of the second suction assembly is communicated with a second air duct. The second air duct is connected with a three-way valve. The second port of the three-way valve is communicated with the liquid storage bottle. The third port of the three-way valve is detachably connected with a third air duct, and one end of the third air duct far away from the three-way valve is connected with the rotating head.

[0009] Further, the rotating head is rotatably connected with a connecting ring, the connecting ring is connected with an air guide cylinder, the air guide cylinder is sleeved on the outer side of the drainage pipe, a plurality of air guide holes are formed in the cylinder body of the air guide cylinder, the third air duct is communicated with the air guide holes, and a plurality of guide vanes are arranged on the end face of the rotating head close to the air guide cylinder. The gas flowing out of the air guide holes acts on the guide vanes to make the rotating head rotate relative to the drainage head.

[0010] Further, an annular groove is formed in the side face of the rotating head close to the air guide cylinder, and the connecting ring is rotatably arranged in the annular groove.

[0011] Further, there are four air guide holes, and the four air guide holes are uniformly arranged with the central axis of the air guide cylinder as the reference axis.

[0012] Further, an annular guide groove is formed in the end face of the rotating head close to the air guide cylinder, and a plurality of the guide vanes are obliquely arranged in the guide groove.

[0013] Furthermore, a plurality of support components are also connected to the base, and the support components are used to support and / or fix the base.

[0014] Furthermore, the support component includes an upper connecting member, an adjusting sleeve, and a lower connecting member. The upper connecting member and the lower connecting member are respectively connected to both ends of the adjusting sleeve through threads with opposite helical directions. By rotating the adjusting sleeve, the upper connecting member and the lower connecting member move towards each other along their axial directions; one end of the upper connecting member away from the adjusting sleeve is rotatably connected to the base.

[0015] Furthermore, one end of the first air duct away from the first suction component is communicated with the upper end face of the liquid accumulation cavity, the liquid storage bottle is communicated with the lower end face of the liquid accumulation cavity, and the drainage main pipe is communicated with the upper middle part of the side end face of the liquid accumulation cavity.

[0016] The principle and beneficial effects of the technical solution are:

[0017] 1. A fluid accumulation treatment device in neurosurgical clinical practice provided by the present invention is provided with a base, a fluid accumulation chamber and a liquid storage bottle. A motor, a first suction assembly and a second suction assembly are connected to the base. The output shaft of the motor is connected to a central gear. The first piston rod of the first suction assembly and the second piston rod of the second suction assembly are respectively connected to a first rack and a second rack, and the first rack and the second rack are respectively externally engaged on the upper and lower sides of the central gear. When the central gear rotates, the first rack and the second rack move in opposite directions, so that the air extraction and / or exhaust states of the first suction assembly and the second suction assembly are opposite; the first suction assembly is communicated with the fluid accumulation chamber through a first air duct, the fluid accumulation chamber is communicated with a drainage tube through a main drainage pipe, and the liquid storage bottle is also communicated with the fluid accumulation chamber. The drainage head connected to the drainage tube is placed in the fluid accumulation. When the first suction assembly extracts air, a negative pressure is generated in the system (the first suction assembly, the first air duct, the fluid accumulation chamber, the main drainage pipe, the drainage tube, the liquid storage bottle), and the fluid accumulation enters the drainage tube through the side holes of the drainage head under the action of the atmospheric pressure, and then flows through the main drainage pipe and the fluid accumulation chamber and is collected in the liquid storage bottle; a rotating head is rotatably sleeved outside the drainage head, and the suction port of the second suction assembly is connected to the rotating head through an air duct. When the first suction assembly extracts air, the second suction assembly exhausts air outwards, and the exhausted air acts on the rotating head through the air duct to drive the rotation of the rotating head, stir the fluid accumulation, reduce the solidification of the fluid accumulation and / or crush the coagulated blocks of the fluid accumulation, so as to facilitate drainage; the rotating head is rotatably sleeved outside the suction head, and when the two rotate relatively, the rotating head can also frictionally wipe and / or cut the side holes (drainage holes) of the suction head to prevent the side holes (drainage holes) of the suction head from being blocked and ensure the treatment effect of the fluid accumulation; the first rack and the second rack are slidably connected to the base, and the base guides and limits the movement of the two to ensure the linearity of their movement, so as to ensure the uniformity and stability of the movement of the piston rod of the suction assembly, make the pressure uniform, stable and controllable during the process of extracting the fluid accumulation, and improve the treatment effect of the fluid accumulation.

[0018] 2. A fluid accumulation treatment device in neurosurgical clinical practice provided by the present invention sets both the rotating head and the suction head as spherical to avoid scratching the human soft tissue by the end faces of the suction head and / or the rotating head, and sets the side holes (suction holes) on the spherical surface, which can also avoid the blockage of the side holes (suction holes) and the resulting damage to the soft tissue caused by the instantaneous increase in pressure at that place, and improve the safety of the fluid accumulation treatment; the diameter of the side holes opened on the rotating head is not less than the diameter of the side holes opened on the drainage head, reducing the influence of the rotating head on the drainage head to ensure the normal suction effect of the drainage head.

[0019] 3. A fluid processing device in neurosurgical clinical practice provided by the present invention. The second suction assembly is connected to the liquid storage bottle and the rotating head through a three-way valve. The three-way valve controls the gas flow direction of the suction assembly. When the gas flows to the rotating head, it drives the rotating head to rotate. When the gas flows to the liquid storage bottle, it pneumatically stirs the liquid in the liquid storage bottle to facilitate subsequent further processing of the liquid in the liquid storage bottle. The drainage main pipe is detachably connected to the drainage pipe, and the three-way valve is detachably connected to the third air duct, so that the suction end (drainage pipe, rotating head) of the entire device is used as a disposable consumable relative to the driving assembly (motor, suction device) and the collection assembly (fluid cavity and liquid storage bottle). It can be discarded after one use, while the driving assembly (motor, suction device) and the collection assembly (fluid cavity and liquid storage bottle) can be reused multiple times, further improving the cost performance of the entire device. The rotating head is rotatably connected to the connecting ring, the connecting ring is connected to the air guide cylinder, the air guide cylinder is sleeved outside the drainage pipe, the cylinder body of the air guide cylinder is provided with air guide holes, the third air duct is communicated with the air guide holes, and the end face of the rotating head close to the air guide cylinder is provided with several guide vanes. When the second suction exhausts, the exhausted gas acts on the guide vanes through the second air duct, the third air duct, and the air guide cylinder (air guide holes), driving the rotating head to rotate relative to the drainage head. An annular groove is opened on the connecting ring, and the connecting ring is sleeved in the annular groove, so that the rotating head can rotate relatively freely relative to the air guide cylinder. Four air guide holes are provided, and the gas flowing out of the four air guide holes acts on the rotating parts at four positions, multiplying the torque driving the rotation, so as to improve the rotation effect of the rotating head relative to the suction head. And a diversion groove is provided on the end face of the rotating head, and the guide vanes are obliquely arranged inside the diversion groove, effectively increasing the acting area of the gas on the guide vanes, accelerating the rotation speed of the rotating head, and improving the functions of stirring and mixing the fluid, preventing coagulation blocks, and "preventing blockage".

[0020] 4. A fluid processing device in neurosurgical clinical practice provided by the present invention. The base is connected to the support assembly, and the support assembly includes an upper connecting piece, an adjusting sleeve, and a lower connecting piece. By rotating the adjusting sleeve, the upper connecting piece and the lower connecting piece move towards each other along their axial directions to adjust the height of the base, so that it can adapt to different clinical needs, and the rotation adjustment method is simple and the adjustment efficiency is high. The first air duct is connected to the upper end face of the fluid cavity, the liquid storage bottle is connected to the lower end face of the fluid cavity, and the drainage main pipe is connected to the upper middle part of the side end face of the fluid cavity to reduce the contact probability of the fluid with the first air duct and facilitate the effective collection of the fluid by the liquid storage bottle. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of a fluid processing device in neurosurgical clinical practice of the present invention;

[0022] Figure 2 It is a front view of a fluid processing device in neurosurgical clinical practice of the present invention;

[0023] Figure 3Side view of a fluid accumulation treatment device in neurosurgical clinical practice according to the present invention;

[0024] Figure 4 It is Figure 3 The cross-sectional view taken along A-A in;

[0025] Figure 5 It is Figure 4 The partial enlarged view at position B in;

[0026] Figure 6 It is the exploded view of the suction head and the rotating head part;

[0027] Figure 7 It is the view of the end face of the rotating head provided with the flow guiding piece.

[0028] The names of the corresponding marks in the attached drawings are:

[0029] Base 1, motor 2, first suction assembly 3, second suction assembly 4, support assembly 5, first piston rod 6, second piston rod 7, central gear 8, first rack 9, second rack 10, first air duct 11, second air duct 12, fluid accumulation chamber 13, liquid storage bottle 14, main drainage pipe 15, three-way valve 16, third air duct 17, air guide cylinder 18, rotating head 19, connecting ring 20, annular groove 21, flow guiding piece 22, drainage pipe 23, drainage head 24, air guide hole 25. Detailed implementation manners

[0030] The present invention will be further described in detail below in conjunction with the attached drawings and implementation manners:

[0031] As Figures 1 to 7 shown, a fluid accumulation treatment device in neurosurgical clinical practice includes a base 1, a fluid accumulation chamber 13 and a liquid storage bottle 14. The base 1 is connected with a motor 2, a first suction assembly 3, a second suction assembly 4 and four support assemblies 5. The output shaft of the motor 2 is fixedly connected with a central gear 8. The first suction assembly 3 is provided with a first piston rod 6, and the first piston rod 6 is fixedly connected with a first rack 9. The second suction assembly 4 is provided with a second piston rod 7, and the second piston rod 7 is fixedly connected with a second rack 10. The first rack 9 and the second rack 10 are respectively externally meshed on the upper and lower sides of the central gear 8, and both the first rack 9 and the second rack 10 are slidably connected with the base 1. When the central gear 8 rotates, the air suction and / or exhaust states of the first suction assembly 3 and the second suction assembly 4 are opposite;

[0032] The suction port of the first suction assembly 3 is communicated with the upper end face of the liquid accumulation cavity 13 through the first air duct 11. The liquid storage bottle 14 is communicated with the lower end face of the liquid accumulation cavity 13. The upper middle part of the side end face of the liquid accumulation cavity 13 is communicated with a main drainage pipe 15. The main drainage pipe 15 is detachably connected with a drainage pipe 23. The drainage pipe 23 is communicated with a drainage head 24. A rotating head 19 is rotatably arranged on the outer side of the drainage pipe 23. The rotating head 19 is rotatably sleeved on the outer side of the drainage head 24. Both the drainage head 24 and the rotating head 19 are three-quarter spheres. A plurality of side holes are opened in both the drainage head 24 and the rotating head 19. The diameter of the side holes opened on the spherical surface of the rotating head 19 is larger than the diameter of the side holes opened on the spherical surface of the drainage head 24;

[0033] The suction port of the second suction assembly 4 is communicated with a second air duct 12. The second air duct 12 is connected with a three-way valve 16. The second port of the three-way valve 16 is communicated with the liquid storage bottle 14. The third port of the three-way valve 16 is detachably connected with a third air duct 17. One end of the third air duct 17 far from the three-way valve 16 is communicated with an air guide cylinder 18. The air guide cylinder 18 is sleeved on the outer side of the drainage pipe 23. Four air guide holes 25 are opened on the cylinder body of the air guide cylinder 18. The four air guide holes 25 are uniformly arranged with the central axis of the air guide cylinder 18 as the reference axis. The third air duct 17 is communicated with the air guide holes 25. An annular groove 21 is opened on the side face of the rotating head 19 close to the air guide cylinder 18. A connecting ring 20 is rotatably sleeved on the outer side of the annular groove 21. The other end of the connecting ring 20 is connected with the air guide cylinder 18. A ring-shaped diversion groove is arranged on the end face of the rotating head 19 close to the air guide cylinder 18. A plurality of diversion sheets 22 are obliquely arranged in the diversion groove. The gas flowing out from the air guide holes 25 acts on the diversion sheets 22 to make the rotating head 19 rotate relative to the drainage head 24;

[0034] Four support assemblies 5 are used to support and / or fix the base 1; the support assembly 5 includes an upper connecting piece, an adjusting sleeve and a lower connecting piece. The upper connecting piece and the lower connecting piece are respectively connected to both ends of the adjusting sleeve through threads with opposite helix directions. By rotating the adjusting sleeve, the upper connecting piece and the lower connecting piece move towards each other along their axial directions; the upper end of the upper connecting piece is rotatably connected with the base 1.

[0035] The specific implementation process is as follows:

[0036] When using this effusion treatment device, first rotate the adjustment sleeves of the four support assemblies 5 according to clinical needs to adjust the height and / or angle of the entire base 1; then connect the third air duct 17 to the three-way valve 16 and the drainage tube 23 to the main drainage tube 15; then place the drainage head 24 at the effusion site, start the motor 2, the first suction assembly 3 sucks air, drains the effusion into the liquid storage bottle 14, the second suction assembly 4 exhausts air, and controls the flow direction of the discharged gas using the three-way valve 16 according to clinical needs. When controlling the gas to flow to the third air duct 17, the gas drives the rotating head 19 to rotate. The rotating head 19 stirs the effusion to reduce the coagulation of the effusion and / or crush the clot of the effusion. The rotating head 19 also frictionally wipes and / or cuts the side holes (drainage holes) of the suction head to prevent the side holes (drainage holes) of the suction head from being blocked, so as to ensure the treatment effect of the effusion. When controlling the gas to flow to the liquid storage bottle 14, pneumatically stir the liquid in the liquid storage bottle 14 to facilitate the subsequent further treatment of the liquid in the liquid storage bottle 14.

[0037] Among them, the first rack 9 and the second rack 10 are slidably connected to the base 1. The base 1 guides and limits the movement of the two to ensure the linearity of their movement, thereby ensuring the uniformity and stability of the movement of the piston rod of the suction assembly, making the pressure uniform, stable and controllable during the process of sucking the effusion, so as to improve the treatment effect of the effusion.

[0038] Both the rotating head 19 and the suction head are set to be spherical to prevent the end faces of the suction head and / or the rotating head 19 from scratching the human soft tissue. And the side holes (suction holes) are arranged on the spherical surface, which can also prevent the side holes (suction holes) from being blocked, resulting in an instant increase in pressure at this place and causing damage to the soft tissue, improving the safety of effusion treatment; the diameter of the side holes opened on the rotating head 19 is not less than the diameter of the side holes opened on the drainage head 24, reducing the influence of the rotating head 19 on the drainage head 24 to ensure the normal suction effect of the drainage head 24.

[0039] The drainage main pipe 15 is detachably connected to the drainage pipe 23, and the three-way valve 16 is detachably connected to the third air duct 17, so that the suction end (drainage pipe 23, rotating head 19) of the whole device is used as a disposable consumable relative to the driving assembly (motor 2, suction device) and the collection assembly (liquid accumulation cavity 13 and liquid storage bottle 14). After being used once, it can be discarded, while the driving assembly (motor 2, suction device) and the collection assembly (liquid accumulation cavity 13 and liquid storage bottle 14) can be reused multiple times, further improving the cost performance of the whole device; Four air guide holes 25 are provided, and the gas flowing out of the four air guide holes 25 acts on the rotating parts at four positions, doubling the torque for driving the rotation, so as to improve the rotation effect of the rotating head 19 relative to the suction head. A diversion groove is provided on the end face of the rotating head 19, and the diversion piece 22 is inclined and arranged inside the diversion groove, effectively increasing the acting area of the gas on the diversion piece 22, accelerating the rotation speed of the rotating head 19, and improving the functions of stirring and mixing the liquid accumulation, preventing coagulation blocks, and "preventing blockage".

[0040] The above are only the embodiments of the present invention. Specific technical solutions or common knowledge such as characteristics well known in the art are not described in detail here. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. A device for treating effusion in clinical neurosurgery, characterized in that: The invention comprises a base, a liquid accumulation chamber and a liquid storage bottle, wherein the base is connected with a motor, a first suction assembly and a second suction assembly, the output shaft of the motor is fixedly connected with a central gear, the first suction assembly is provided with a first piston rod, the first piston rod is fixedly connected with a first rack, the second suction assembly is provided with a second piston rod, the second piston rod is fixedly connected with a second rack, the first rack and the second rack are respectively externally meshed at the upper and lower sides of the central gear, and the first rack and the second rack are both slidably connected with the base, and when the central gear rotates, the first suction assembly and the second suction assembly The suction and / or exhaust states of the components are opposite; the suction port of the first suction component is connected with the liquid accumulation chamber through a first air duct, the liquid storage bottle is connected with the liquid accumulation chamber, and the liquid accumulation chamber is also connected with a drainage main pipe; the drainage main pipe is detachably connected with a drainage tube, and the drainage tube is connected with a drainage head; a rotating head is also rotatably provided on the outer side of the drainage tube, the rotating head is rotatably mounted on the outer side of the drainage head, and a plurality of side holes are provided on the drainage head and the rotating head, and the suction port of the second suction component is connected with the rotating head through an air duct for driving the rotation of the rotating head.

2. A device for treating effusion in clinical neurosurgery according to claim 1, characterized in that: The rotating head and the drainage head are both three-quarter spheres, and the diameter of the side hole opened on the spherical surface of the rotating head is not less than the diameter of the side hole opened on the spherical surface of the drainage head.

3. A device for treating effusion in clinical neurosurgery according to claim 2, characterized in that: The suction port of the second suction assembly is connected to a second air duct, the second air duct is connected to a three-way valve, the second port of the three-way valve is connected to the liquid storage bottle, the third port of the three-way valve is detachably connected to a third air duct, and the end of the third air duct away from the three-way valve is connected to the rotating head.

4. A device for treating effusion in clinical neurosurgery according to claim 3, characterized in that: The rotating head is rotatably connected to a connecting ring, the connecting ring is connected to an air guide cylinder, the air guide cylinder is sleeved on the outside of the drainage tube, the cylinder body of the air guide cylinder is provided with a plurality of air guide holes, the third air guide tube is communicated with the air guide holes, the end face of the rotating head close to the air guide cylinder is provided with a plurality of guide plates, the gas flowing out of the air guide holes acts on the guide plates, so that the rotating head rotates relative to the drainage head.

5. A device for treating effusion in clinical neurosurgery according to claim 4, characterized in that: An annular groove is provided on the side of the rotating head close to the air guide cylinder, and the connecting ring is rotatably arranged in the annular groove.

6. A device for treating effusion in clinical neurosurgery according to claim 4, characterized in that: There are four air guide holes, and the four air guide holes are evenly arranged with the central axis of the air guide cylinder as the reference axis.

7. The device for treating effusion in clinical neurosurgery according to claim 4, characterized in that: The end surface of the rotating head close to the air guide cylinder is provided with an annular guide groove, and a plurality of guide plates are arranged obliquely in the guide groove.

8. The device for treating effusion in clinical neurosurgery according to claim 1, characterized in that: The base is also connected to a plurality of supporting components, and the supporting components are used to support and / or fix the base.

9. A device for treating effusion in clinical neurosurgery according to claim 8, characterized in that: The support assembly includes an upper connecting member, an adjusting sleeve and a lower connecting member. The upper connecting member and the lower connecting member are respectively connected to the two ends of the adjusting sleeve by threads with opposite rotation directions. When the adjusting sleeve is rotated, the upper connecting member and the lower connecting member move toward each other along their axial direction. The end of the upper connecting member away from the adjusting sleeve is rotatably connected to the base.

10. The device for treating effusion in clinical neurosurgery according to claim 1, characterized in that: One end of the first air guide tube away from the first suction assembly is connected to the upper end surface of the fluid accumulation chamber, the liquid storage bottle is connected to the lower end surface of the fluid accumulation chamber, and the drainage main pipe is connected to the middle and upper part of the side end surface of the fluid accumulation chamber.

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