Drainage device for ERCP

Abstract

The invention discloses a drainage device for ERCP, and relates to the technical field of drainage. A control problem is solved. The device specifically comprises a fixing frame, a container cover is fixed to one side of the fixing frame, a container used for storing tissue fluid is detachably and fixedly connected to the bottom of the container cover, a plurality of connector assemblies are connected to the top of the container cover, a suction pipe is fixed to the top of the container cover, and an air pump is fixed to the other end of the suction pipe; an air outlet of the air pump is exposed to the atmospheric environment, and the air pump is fixed to the side wall of the fixing frame through bolts. By arranging the suction pipe and ingeniously utilizing the blocking principle of movement and the series connection principle of a circuit, in the whole suction process, only one driving control needs to be applied to the air pump, then the intermittent working state can be automatically carried out subsequently according to the suction pressure intensity, on one hand, the control logic is simplified, and on the other hand, the control efficiency is improved; and on the other hand, intermittent work can also achieve a certain energy-saving effect.

Description

Technical Field

[0001] The present invention relates to the field of drainage technology, and in particular to a drainage device for ERCP. Background Art

[0002] Retrograde cholangiopancreatography (ERCP) is a procedure in which an endoscope is inserted into the descending duodenum. After finding the duodenal papilla, a contrast tube is inserted from the biopsy hole of the endoscope to the opening of the papilla, and contrast agent is injected to perform examinations such as bile and pancreatic duct X-ray, bile bacteriology and cytology, and biliary pressure and papillary sphincter function tests. Patients who return to the ward after ERCP surgery need a drainage device to drain and collect the tissue fluid because the tissue fluid in the body will extravasate during the healing process.

[0003] After searching, the Chinese patent publication number CN221579110U discloses a special drainage device for ERCP, including a bed, a ring-shaped seat is fixedly installed at the lower end of the side wall of the bed, a drainage tube is installed inside the ring-shaped seat, an exhaust pipe and a liquid inlet pipe are respectively installed on the top of the drainage tube, a nut is threadedly connected to the upper end of the exhaust pipe, and a connecting pipe is threadedly connected to the upper end of the nut.

[0004] The above patent has the following shortcomings: since during drainage, the negative pressure suction pressure needs to be within a certain pressure range to ensure reliable drainage, the above patent uses an electric push rod to achieve the generation of negative pressure. In order to maintain the negative pressure, on the one hand, it is necessary to set up a corresponding pressure sensor to sense the negative pressure, and then control the position of the electric push rod in real time. On the other hand, the electric push rod will always be in a charged state, which increases energy consumption.

[0005] To this end, the present invention provides a drainage device for ERCP. Summary of the invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a drainage device for ERCP.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An ERCP drainage device comprises a fixing frame,

[0009] A container cover is fixed to one side of the fixing frame, a container for storing tissue fluid is detachably fixedly connected to the bottom of the container cover, a plurality of joint assemblies are connected to the top of the container cover, a suction pipe is fixed to the top of the container cover, an air pump is fixed to the other end of the suction pipe, an air outlet of the air pump is exposed to the atmospheric environment and the air pump is fixed to the side wall of the fixing frame by bolts, and an intermittent control mechanism for opening and closing the air pump is arranged on the top of the suction pipe;

[0010] The intermittent control mechanism includes a tubular cylinder welded and connected to a suction pipe, and a piston slidably connected to the inner wall of the suction pipe, a spring 1 is buckled at the bottom of the piston, a fixing ring 1 is buckled at the other end of the spring 1, the fixing ring 1 is fixed to the bottom inner wall of the tubular cylinder, an electrode sheet 1 is fixed to the top inner wall of the tubular cylinder, an electrode sheet 2 cooperating with the electrode sheet 1 is fixed to the top outer wall of the piston, the electrode sheet 1 and the electrode sheet 2 are connected in series to the power supply circuit of the air pump, and an elastic blocking component for limiting the movement of the piston is provided on the side wall of the tubular cylinder.

[0011] Preferably: the elastic blocking assembly includes an arc head slide rod and a slide plate slidably connected to the tubular cylinder, the arc head slide rod and the piston are in contact and limited cooperation, a spring 2 is buckled on the opposite side of the arc head slide rod and the slide plate, the outer wall of the tubular cylinder is connected to an adjusting bolt through a thread, and the end of the adjusting bolt contacts and cooperates with the side of the slide plate.

[0012] Furthermore, the suction pipe runs through the container cover, and the bottom of the suction pipe is lower than the opening height of the container.

[0013] On the basis of the above-mentioned solution: two electrode heads are symmetrically embedded in the outer wall of the bottom of the suction pipe, and a pressure relief hole is opened on the side wall of the suction pipe.

[0014] A better solution among the above solutions is: a friction block is slidably connected to the side wall of the piston, a permanent magnet is fixed to the side wall of the friction block, an electromagnet is fixedly embedded on the inner wall at the center of the piston, and the magnetic poles of the permanent magnet and the electromagnet are the same on the opposite side.

[0015] As a further solution of the present invention: the side walls of the fixing frame are respectively fixed with a control panel, an audible and visual alarm and a power supply, and the power supply, the electrode head, the electromagnet and the audible and visual alarm are connected to the same circuit.

[0016] At the same time, the joint assembly includes a conical tube fixed to the side wall of the container cover and a joint connected to the end of the conical tube through a nut, the other end of the joint is connected to a drainage tube, and the other end of the drainage tube is placed in the patient's body.

[0017] As a preferred embodiment of the present invention, the nut is movably sleeved on the outer wall of the joint, and the tapered tube is connected to the inner wall of the nut through a thread arranged at the end thereof.

[0018] At the same time, the inner wall of the conical tube is provided with a frustum plug matching the conical area of ​​the conical tube, the side wall of the frustum plug is buckled with a spring three, the other end of the spring three is buckled with a fixing ring two, and the fixing ring two is fixed to the inner wall of the conical tube.

[0019] As a more optimal solution of the present invention: a hollow frame is fixed to the inner wall of the joint, an insertion rod is fixed to the side wall of the hollow frame, and the insertion rod is in contact with and matched with the frustum plug.

[0020] The beneficial effects of the present invention are:

[0021] 1. The present invention, by setting a suction tube, cleverly utilizes the principle of motion obstruction and the principle of series connection of circuits. Therefore, during the entire suction process, only one driving control needs to be applied to the air pump, and then it can automatically perform intermittent working state according to the size of the suction pressure. On the one hand, this simplifies the control logic and realizes the mechanical automation function. On the other hand, intermittent work can also achieve a certain energy-saving effect.

[0022] 2. The present invention, by configuring the elastic blocking component as a combination of an arc head slide rod, spring 2, an adjusting bolt and a slide plate, can utilize the slide plate to adjust the movement resistance of the arc head slide rod to the piston, thereby being able to adjust the negative pressure range during negative pressure attraction.

[0023] 3. The present invention, by providing the electrode head, friction block, electromagnet and other components, can, after reaching the maximum liquid level, on the one hand, send out an audible and visual alarm, and on the other hand, can prevent the piston from resetting and prevent the air pump from starting again to supplement the negative pressure, thereby solving the pollution problem. In addition, the entire process cleverly utilizes the conductivity of tissue fluid to achieve self-induction and self-drive, thus solving the control delay problem.

[0024] 4. The present invention, by setting up multiple joint assemblies, can realize the simultaneous attraction of multiple areas, and the joint assembly is specifically designed as a split structure of the conical tube and the joint, so that quick connection and disassembly can be achieved. At the same time, by setting an insertion rod and a cone plug, the joint and the conical tube can be automatically connected when combined, and the conical tube can be automatically blocked when separated, thereby increasing the convenience of use.

[0025] 5. The present invention, by providing a limit plate and an inclined block, can be fixed to the circular or square fence of the hospital bed by utilizing the gap between the limit plate and the fixing frame for clamping; and can be fixed to the "L"-shaped angle iron of the bed body by utilizing the gap between the inclined block and the fixing frame for clamping, thereby increasing the convenience of fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of an ERCP drainage device proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the intermittent control mechanism structure of an ERCP drainage device proposed by the present invention;

[0028] Figure 3 The present invention provides an ERCP drainage device Figure 2 The enlarged structural diagram of part A in the middle;

[0029] Figure 4 This is a schematic diagram of the structure of an aspiration tube of a drainage device for ERCP proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the internal structure of a piston of a drainage device for ERCP proposed by the present invention;

[0031] Figure 6 This is a schematic diagram of the structure of a connector assembly of a drainage device for ERCP proposed by the present invention;

[0032] Figure 7 This is a schematic diagram of the back structure of a fixing frame of an ERCP drainage device proposed by the present invention;

[0033] Figure 8 The present invention is a schematic diagram of the circuit structure of a drainage device for ERCP.

[0034] In the figure: 1. fixing frame; 2. control panel; 3. sound and light alarm; 4. air pump; 5. power supply; 6. intermittent control mechanism; 7. suction pipe; 8. joint assembly; 9. container cover; 10. container; 11. fixing ring 1; 12. spring 1; 13. elastic blocking assembly; 14. piston; 15. tubular cylinder; 16. electrode sheet 1; 17. electrode sheet 2; 18. arc head slide rod; 19. spring 2; 20. adjusting bolt; 21. slide plate; 22. pressure relief hole; 23. electrode head; 24. friction block; 25. permanent magnet; 26. conical tube; 27. spring 3; 28. nut; 29. ​​joint; 30. drainage tube; 31. hollow frame; 32. plug rod; 33. cone plug; 34. fixing ring 2; 35. limit plate; 36. inclined block; 37. electromagnet. DETAILED DESCRIPTION

[0035] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0036] The embodiments of the present invention are described in detail below. Examples of the following embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] Embodiment 1:

[0038] An ERCP drainage device, such as Figure 1-Figure 8 As shown, it includes a fixing frame 1, a container cover 9 is fixed to one side of the fixing frame 1, a container 10 for storing tissue fluid is detachably fixedly connected to the bottom of the container cover 9, a plurality of joint assemblies 8 are connected to the top of the container cover 9, a suction tube 7 is fixed to the top of the container cover 9, an air pump 4 is fixed to the other end of the suction tube 7, an air outlet of the air pump 4 is exposed to the atmospheric environment and the air pump 4 is fixed to the side wall of the fixing frame 1 by bolts, and an intermittent control mechanism 6 for controlling the opening and closing of the air pump 4 is arranged on the top of the suction tube 7.

[0039] The intermittent control mechanism 6 includes a tubular cylinder 15 welded and connected to the suction pipe 7 and a piston 14 slidably connected to the inner wall of the suction pipe 7, the bottom of the piston 14 is buckled with a spring 12, the other end of the spring 12 is buckled with a fixing ring 11, the fixing ring 11 is fixed to the bottom inner wall of the tubular cylinder 15, the top inner wall of the tubular cylinder 15 is fixed with an electrode sheet 16, the top outer wall of the piston 14 is fixed with an electrode sheet 2 17 that cooperates with the electrode sheet 16, the electrode sheet 16 and the electrode sheet 2 17 are connected in series to the power supply circuit of the air pump 4, and the side wall of the tubular cylinder 15 is provided with an elastic blocking component 13 for limiting the movement of the piston 14.

[0040] When the device is in use, the air pump 4 is first started, and negative pressure is applied to the container 10 through the suction tube 7. At the same time, the negative pressure is also transmitted to the piston 14 until the force of the negative pressure on the piston 14 is greater than the elastic movement resistance of the elastic blocking component 13 to the piston 14, the piston 14 will move downward and pass the elastic blocking component 13, at this time, the electrode sheet 16 is separated from the electrode sheet 2 17, the air pump 4 is automatically disconnected, and the spring 12 is compressed. At this time, the corresponding pressure is the upper limit of the pressure of the negative pressure attraction. As the tissue fluid gradually enters the container 10, the air pressure in the container 10 gradually decreases, and the negative pressure attraction force on the piston 14 decreases. Until the lower limit of the pressure of the negative pressure attraction is reached, the elastic force of the spring 12 on the piston 14 is greater than the sum of the negative pressure attraction force on the piston 14 and the resistance of the elastic blocking component 13, the piston 14 moves upward and passes the elastic blocking component 13 again, so that the electrode sheet 16 is combined with the electrode sheet 2 17, and the air pump 4 is started again until the negative pressure reaches the upper limit again.

[0041] The following is a motion and force analysis, assuming that the motion resistance of the elastic blocking component 13 to the piston 14 is F 阻 , the area of ​​the piston 14 is S, when the piston 14 is located above the elastic blocking component 13, the compression amount of the spring 12 is ΔX, the elastic modulus is k, and the maximum longitudinal width of the elastic blocking component 13 is L, then: P max , P min They are the upper and lower limits of negative pressure suction, respectively. It can be seen that the pressure range of negative pressure suction can be determined by F 阻 to adjust the size.

[0042] The device, by setting up the suction tube 7, cleverly utilizes the principle of motion obstruction and the principle of series connection of the circuit. Therefore, during the entire suction process, only a driving control needs to be applied to the air pump 4, and then it can automatically perform intermittent working state according to the size of the suction pressure. On the one hand, this simplifies the control logic and realizes the mechanical automation function. On the other hand, intermittent work can also achieve a certain energy-saving effect.

[0043] To solve the regulation problem; Figure 3 As shown, the elastic blocking assembly 13 includes an arc head slide rod 18 and a slide plate 21 which are slidably connected to the tubular cylinder 15. The arc head slide rod 18 is in contact and limited cooperation with the piston 14. A spring 19 is buckled on the opposite side of the arc head slide rod 18 and the slide plate 21. The outer wall of the tubular cylinder 15 is connected with an adjusting bolt 20 through a thread, and the end of the adjusting bolt 20 is in contact and cooperates with the side of the slide plate 21.

[0044] When the combined force of the forces acting on the piston 14 is greater than the resistance of the arc surface part of the arc head slide 18 to the piston 14, the arc head slide 18 is subjected to a reaction force so that the spring 2 19 is compressed, and the arc head slide 18 shrinks to the inside of the tubular cylinder 15. After the piston 14 moves and passes over the arc head slide 18, the arc head slide 18 rebounds, and when the adjusting bolt 20 is rotated, it can drive the slide plate 21 to slide, so as to change the compression amount of the spring 2 19 between the arc head slide 18 and the slide plate 21, and then change the elastic force of the arc head slide 18, thereby changing the movement resistance provided by the arc head slide 18 to the piston 14.

[0045] The device, by configuring the elastic blocking component 13 as a combination of an arc head slide bar 18, a spring 19, an adjusting bolt 20 and a slide plate 21, can utilize the slide plate 21 to adjust the movement resistance of the arc head slide bar 18 to the piston 14, thereby being able to adjust the negative pressure range during negative pressure suction.

[0046] In order to solve the protection problem; Figure 1 , 4 As shown in FIGS. 5 and 8 , the suction pipe 7 passes through the container cover 9 , and the bottom of the suction pipe 7 is lower than the opening height of the container 10 . Two electrode heads 23 are symmetrically embedded on the bottom outer wall of the suction pipe 7 , and a pressure relief hole 22 is opened on the side wall of the suction pipe 7 .

[0047] The side wall of the piston 14 is slidably connected with a friction block 24, and a permanent magnet 25 is fixed to the side wall of the friction block 24. An electromagnet 37 is fixedly embedded in the inner wall at the center of the piston 14, and the magnetic poles of the permanent magnet 25 and the electromagnet 37 on the opposite side are the same.

[0048] The side walls of the fixing frame 1 are respectively fixed with a control panel 2, an audible and visual alarm 3 and a power supply 5. The power supply 5, the electrode head 23, the electromagnet 37 and the audible and visual alarm 3 are connected to the same circuit.

[0049] During the negative pressure suction process, if the carrying capacity of the container 10 has reached the maximum, if the negative pressure suction is continued at this time, the tissue fluid will enter the air pump 4 along the suction tube 7. This will cause the suction tube 7 and the air pump 4 to be contaminated on the one hand, and on the other hand, it will cause the tissue fluid to spray out from the air outlet of the air pump 4, polluting the environment. Based on this, when the tissue fluid carrying capacity in the container 10 reaches the maximum value, the liquid level of the tissue fluid is level with the height of the electrode head 23. Since the tissue fluid contains a large amount of sodium, potassium, and chloride ions, it will conduct electricity, so that the two electrode heads 23 are connected. On the one hand, the electromagnet 37 is turned on, and the electromagnet 37 and the permanent magnet 25 generate magnetic repulsion, so that the friction block 24 is tightly attached to the inner wall of the tubular cylinder 15, hindering the upward reset of the piston 14, thereby preventing the air pump 4 from starting again. On the other hand, the sound and light alarm 3 sends out a sound and light alarm to remind medical staff to replace the container 10.

[0050] The device, by providing components such as the electrode head 23, the friction block 24, and the electromagnet 37, can, after reaching the maximum liquid level, on the one hand, emit an audible and visual alarm, and on the other hand, prevent the piston 14 from resetting and prevent the air pump 4 from starting again to supplement the negative pressure, thereby solving the pollution problem. In addition, the entire process cleverly utilizes the conductivity of the tissue fluid to achieve self-induction and self-drive, thereby solving the control delay problem.

[0051] To solve the connection problem; Figure 6 As shown, the connector assembly 8 includes a conical tube 26 fixed to the side wall of the container cover 9 and a connector 29 connected to the end of the conical tube 26 through a nut 28, the other end of the connector 29 is connected to a drainage tube 30, and the other end of the drainage tube 30 is placed in the patient's body.

[0052] The nut 28 is movably sleeved on the outer wall of the joint 29 , and the tapered tube 26 is connected to the inner wall of the nut 28 via a thread provided at the end thereof.

[0053] The inner wall of the conical tube 26 is provided with a frustum plug 33 matching the conical area of ​​the conical tube 26 , the side wall of the frustum plug 33 is buckled with a spring three 27 , the other end of the spring three 27 is buckled with a fixing ring two 34 , and the fixing ring two 34 is fixed to the inner wall of the conical tube 26 .

[0054] A hollow frame 31 is fixed to the inner wall of the joint 29 , and an insertion rod 32 is fixed to the side wall of the hollow frame 31 . The insertion rod 32 is in contact with and fits with a frustum plug 33 .

[0055] When the joint assembly is engaged, after the joint 29 is flush with the end of the tapered tube 26, the nut 28 is tightened to fix the joint 29 to the tapered tube 26. At this time, the insertion rod 32 will contact and squeeze the frustum plug 33, so that the frustum plug 33 is separated from the tapered area of ​​the tapered tube 26. At this time, the drainage tube 30 and the tapered tube 26 are in a connected state. When the joint assembly is separated, the nut 28 and the tapered tube 26 are unscrewed. The frustum plug 33 is not limited by the insertion rod 32. The frustum plug 33 is fitted to the tapered area of ​​the tapered tube 26 by the elastic force of the spring three 27, thereby achieving closed sealing.

[0056] The device, by providing a plurality of joint assemblies 8, can realize simultaneous attraction of multiple areas, and the joint assembly 8 is specifically designed as a split structure of the conical tube 26 and the joint 29, so that quick connection and disassembly can be achieved. At the same time, by providing an insertion rod 32 and a frustum plug 33, the joint 29 can be automatically connected when combined with the conical tube 26, and the conical tube 26 can be automatically blocked when separated, thereby increasing the convenience of use.

[0057] When the present embodiment is in use, the air pump 4 is first started, and negative pressure is applied to the container 10 through the suction tube 7. At the same time, the negative pressure is also transmitted to the piston 14 until the force exerted by the negative pressure on the piston 14 is greater than the elastic movement resistance of the elastic blocking component 13 to the piston 14. The piston 14 moves downward and passes over the elastic blocking component 13. At this time, the electrode sheet 16 is separated from the electrode sheet 2 17, the air pump 4 is automatically disconnected, and the spring 12 is compressed. At this time, the corresponding pressure is the upper limit of the negative pressure attraction. As tissue fluid gradually enters the container 10, the air pressure in the container 10 gradually decreases, and the negative pressure attraction force on the piston 14 decreases. Until the lower limit of the negative pressure attraction is reached, the elastic force of the spring 12 on the piston 14 is greater than the pressure on the piston 14. The sum of the negative pressure attraction and the resistance of the elastic blocking component 13 causes the piston 14 to move upward and pass over the elastic blocking component 13 again, thereby combining the electrode sheet 16 with the electrode sheet 2 17, and the air pump 4 is started again until the negative pressure reaches the upper limit value again. When the combined force of the forces acting on the piston 14 is greater than the resistance of the arc surface part of the arc head slide rod 18 to the piston 14, the arc head slide rod 18 is subjected to a reaction force, thereby compressing the spring 2 19, and the arc head slide rod 18 shrinks to the inside of the tubular cylinder 15. After the piston 14 moves and passes over the arc head slide rod 18, the arc head slide rod 18 rebounds, and when the adjusting bolt 20 is rotated, it can drive the slide plate 21 to slide, so as to change the compression amount of the spring 2 19 between the arc head slide rod 18 and the slide plate 21, thereby changing the elastic force of the arc head slide rod 18 force, thereby changing the movement resistance provided by the arc head slide rod 18 to the piston 14. During the negative pressure suction process, if the carrying capacity of the container 10 has reached the maximum, if the negative pressure suction is continued at this time, the tissue fluid will enter the air pump 4 along the suction tube 7. On the one hand, this will cause the suction tube 7 and the air pump 4 to be contaminated, and on the other hand, it will cause the tissue fluid to be sprayed out from the air outlet of the air pump 4, polluting the environment. Based on this, when the tissue fluid carrying capacity in the container 10 reaches the maximum value, the liquid level of the tissue fluid is at the same height as the electrode head 23. Since the tissue fluid contains a large amount of sodium, potassium, and chloride ions, it will conduct electricity, thereby connecting the two electrode heads 23. On the one hand, the electromagnet 37 is connected, and the electromagnet 37 and the permanent magnet 25 generate magnetic repulsion, which makes the friction block 24 close to it. The inner wall of the tubular cylinder 15 hinders the upward reset of the piston 14, thereby preventing the air pump 4 from starting again. On the other hand, the sound and light alarm 3 sends out a sound and light alarm to remind the medical staff to replace the container 10. When the joint assembly is engaged, the joint 29 is flush with the end of the conical tube 26, and the nut 28 is tightened to fix the joint 29 and the conical tube 26. At this time, the insertion rod 32 will contact and squeeze the cone plug 33, so that the cone plug 33 is separated from the conical area of ​​the conical tube 26. At this time, the drainage tube 30 and the conical tube 26 are in a connected state. When the joint assembly is separated, the nut 28 and the conical tube 26 are unscrewed. The cone plug 33 is not limited by the insertion rod 32. The cone plug 33 is fitted to the conical area of ​​the conical tube 26 by the elastic force of the spring three 27.Thereby achieving closed blocking.

[0058] Embodiment 2:

[0059] An ERCP drainage device, such as Figure 7 As shown, in order to solve the fixing problem, this embodiment makes the following improvements on the basis of embodiment 1: a limiting plate 35 is fixed to the back of the fixing frame 1, and an inclined block 36 is fixed to the inner side of the limiting plate 35.

[0060] The device, by setting a limit plate 35 and a slope block 36, can be fixed on the circular or square fence of the bed by utilizing the gap between the limit plate 35 and the fixing frame 1 for clamping; when fixed on the "L"-shaped angle iron of the bed body of the bed, the gap between the slope block 36 and the fixing frame 1 can be clamped, thereby increasing the convenience of fixing.

[0061] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A drainage device for ERCP, comprising a fixing frame (1), characterized in that: A container cover (9) is fixed to one side of the fixing frame (1), a container (10) for storing tissue fluid is detachably fixedly connected to the bottom of the container cover (9), a plurality of joint assemblies (8) are connected to the top of the container cover (9), a suction pipe (7) is fixed to the top of the container cover (9), an air pump (4) is fixed to the other end of the suction pipe (7), an air outlet of the air pump (4) is exposed to the atmospheric environment and the air pump (4) is fixed to the side wall of the fixing frame (1) by bolts, and an intermittent control mechanism (6) for controlling the opening and closing of the air pump (4) is arranged at the top of the suction pipe (7); The intermittent control mechanism (6) comprises a tubular cylinder (15) welded and connected to the suction pipe (7) and a piston (14) slidably connected to the inner wall of the suction pipe (7); a spring (12) is buckled at the bottom of the piston (14); a fixing ring (11) is buckled at the other end of the spring (12); the fixing ring (11) is fixed to the bottom inner wall of the tubular cylinder (15); an electrode sheet (16) is fixed to the top inner wall of the tubular cylinder (15); an electrode sheet (17) matched with the electrode sheet (16) is fixed to the top outer wall of the piston (14); the electrode sheet (16) and the electrode sheet (17) are connected in series to the power supply circuit of the air pump (4); and an elastic blocking component (13) for limiting the movement of the piston (14) is provided on the side wall of the tubular cylinder (15).

2. The ERCP drainage device according to claim 1, characterized in that: The elastic blocking component (13) comprises an arc head slide rod (18) and a slide plate (21) which are slidably connected to the tubular cylinder (15); the arc head slide rod (18) and the piston (14) are contacted and limitedly matched; a spring 2 (19) is buckled on the opposite side of the arc head slide rod (18) and the slide plate (21); an outer wall of the tubular cylinder (15) is connected to an adjusting bolt (20) through a thread, and the end of the adjusting bolt (20) contacts and matches the side of the slide plate (21).

3. The ERCP drainage device according to claim 1, characterized in that: The suction pipe (7) passes through the container cover (9), and the bottom of the suction pipe (7) is lower than the opening height of the container (10).

4. The ERCP drainage device according to claim 3, characterized in that: Two electrode heads (23) are symmetrically embedded on the outer wall of the bottom of the suction pipe (7), and a pressure relief hole (22) is provided on the side wall of the suction pipe (7).

5. The ERCP drainage device according to claim 4, characterized in that: The side wall of the piston (14) is slidably connected with a friction block (24), the side wall of the friction block (24) is fixed with a permanent magnet (25), the inner wall at the center of the piston (14) is fixedly embedded with an electromagnet (37), and the magnetic poles of the permanent magnet (25) and the electromagnet (37) on the opposite side are the same.

6. The ERCP drainage device according to claim 5, characterized in that: A control panel (2), an audible and visual alarm (3) and a power supply (5) are respectively fixed to the side walls of the fixing frame (1); the power supply (5), the electrode head (23), the electromagnet (37) and the audible and visual alarm (3) are connected to the same circuit.

7. The ERCP drainage device according to claim 1, characterized in that: The joint assembly (8) comprises a conical tube (26) fixed to the side wall of the container cover (9) and a joint (29) connected to the end of the conical tube (26) via a nut (28); the other end of the joint (29) is connected to a drainage tube (30); the other end of the drainage tube (30) is placed in the patient's body.

8. The ERCP drainage device according to claim 7, characterized in that: The nut (28) is movably sleeved on the outer wall of the joint (29), and the conical tube (26) is connected to the inner wall of the nut (28) through a thread arranged at the end thereof.

9. The ERCP drainage device according to claim 7, characterized in that: The inner wall of the conical tube (26) is provided with a frustum plug (33) matching the conical region of the conical tube (26); a spring three (27) is buckled on the side wall of the frustum plug (33); a fixing ring two (34) is buckled on the other end of the spring three (27); and the fixing ring two (34) is fixed to the inner wall of the conical tube (26).

10. The ERCP drainage device according to claim 9, characterized in that: A hollow frame (31) is fixed to the inner wall of the joint (29), an insertion rod (32) is fixed to the side wall of the hollow frame (31), and the insertion rod (32) is in contact with and matched with a frustum plug (33).

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