Negative pressure suction system for an endoscope irrigation and suction device

Abstract

The application discloses a negative pressure suction system of an endoscope flushing and suction device, which comprises a base, a double-head negative pressure pump arranged in the base, wherein the double-head negative pressure pump comprises a double-head negative pressure A pump and a double-head negative pressure B pump, the double-head negative pressure A pump is provided with an A pump air inlet and an A pump air outlet, and the double-head negative pressure B pump is provided with a B pump air inlet and a B pump air outlet; the double-head negative pressure A pump and the double-head negative pressure B pump are arranged in series, and the A pump air inlet of the double-head negative pressure A pump is connected with the B pump air inlet of the double-head negative pressure B pump through a pipeline; the base is further provided with a negative pressure monitoring and protection bottle, the top of the negative pressure monitoring and protection bottle is provided with a device end negative pressure input joint, a negative pressure output joint and a negative pressure pressure measurement joint, and the device end negative pressure input joint, the negative pressure output joint and the negative pressure pressure measurement joint are connected with the cavity of the negative pressure monitoring and protection bottle in a penetrating mode. The application can reduce intraoperative environmental interference, improve the sound reduction and shockproof effects, simultaneously perform safety protection on negative pressure liquid discharge and realize real-time monitoring of safe negative pressure.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a negative pressure suction system of an endoscope flushing and suction device. BACKGROUND

[0002] Urinary calculi is a common and frequently-occurring disease in urology. With the continuous development of endoscopic technology and the continuous improvement of lithotripsy equipment and stone removal tools, endoscopic laser lithotripsy is currently mainly used to treat kidney stones. During endoscopic lithotripsy surgery, a suction process is required. Physiological saline in a flushing container 12 is first flushed into the abdominal cavity through an endoscope 13, and a double-head negative pressure pump draws the flushing liquid (waste liquid) into a waste liquid collection container through a guide sheath 14. During the suction process, noise and vibration are generated due to the operation of the pump body, which can cause instrument interference. Currently, there is no real-time monitoring of negative pressure, which can easily cause flow deviation, increase the risk of surgery, and affect the treatment effect, and thus needs to be improved. SUMMARY

[0003] To solve the problems in the prior art, the purpose of the present application is to provide a negative pressure suction system of an endoscope flushing and suction device, which can take safety protection for the negative pressure drainage process and real-time monitoring of the pressure of the negative pressure, and can reduce noise and vibration generated during the operation of the negative pressure pump during waste liquid suction, thereby improving the treatment effect.

[0004] To achieve the above purpose, the present application adopts the following technical scheme:

[0005] A negative pressure suction system of an endoscope flushing and suction device, comprising a base, a double-head negative pressure pump is arranged in the base, the double-head negative pressure pump comprises a double-head negative pressure A pump and a double-head negative pressure B pump, an A pump air inlet and an A pump air outlet are arranged on the double-head negative pressure A pump, a B pump air inlet and a B pump air outlet are arranged on the double-head negative pressure B pump, the double-head negative pressure A pump and the double-head negative pressure B pump are arranged in series, and the A pump air inlet of the double-head negative pressure A pump is connected with the B pump air inlet of the double-head negative pressure B pump through a conduit.

[0006] An A silencer and a B silencer are further arranged in the base, the double-head negative pressure A pump is connected with the A silencer, and the double-head negative pressure B pump is connected with the B silencer.

[0007] A negative pressure monitoring and protection bottle is further arranged on the base, a device end negative pressure input joint, a negative pressure output joint and a negative pressure pressure measurement joint are arranged on the top of the negative pressure monitoring and protection bottle, and the device end negative pressure input joint, the negative pressure output joint and the negative pressure pressure measurement joint are connected with the cavity of the negative pressure monitoring and protection bottle.

[0008] The device end negative pressure input joint is connected with a second negative pressure suction joint through one of the conduits, and the negative pressure pressure measurement joint is connected with a negative pressure pressure measurement plug seat through one of the conduits.

[0009] The negative pressure output inlet on the negative pressure output joint is arranged at the bottom in the negative pressure monitoring protection bottle cavity;

[0010] The negative pressure monitoring protection bottle is arranged on the outside of the rear wall of the base;

[0011] The equipment end negative pressure input joint, the negative pressure output joint and the negative pressure pressure measurement joint are independently arranged at the top of the negative pressure monitoring protection bottle;

[0012] The equipment end negative pressure input joint and the negative pressure pressure measurement joint are coaxially and oppositely arranged at the top of the negative pressure monitoring protection bottle;

[0013] The top of the first waste liquid bottle is provided with a patient end negative pressure pipe joint and a liquid discharge joint which are spaced apart, and the top of the second waste liquid bottle is provided with a negative pressure transmission joint and a first negative pressure suction joint which are spaced apart; the patient end negative pressure pipe joint is connected to the guide sheath through one of the conduits;

[0014] The patient end negative pressure pipe joint is provided with a one-way valve at the bottom end of the first waste liquid bottle cavity; the liquid discharge joint on the first waste liquid bottle is in conductive connection with the negative pressure transmission joint on the patient end negative pressure pipe joint through one of the conduits, and the first negative pressure suction joint on the second waste liquid bottle is in conductive connection with the negative pressure output joint on the negative pressure monitoring protection bottle through one of the conduits.

[0015] Further, in some embodiments, the A pump outlet of the double-head negative pressure A pump is in communication with the A silencer through a conduit, and the B pump outlet of the double-head negative pressure B pump is in communication with the B silencer through a conduit;

[0016] The sidewall of the base is provided with a second negative pressure suction joint, and the second negative pressure suction joint is in communication with the A pump inlet of the double-head negative pressure A pump through a conduit;

[0017] The sidewall of the A silencer is provided with an outwardly protruding A silencer inlet, and the two ends of the A silencer are provided with air release meshes; the A silencer is provided with sound-absorbing cotton close to the two ends in the inner cavity of the A silencer; the sound-absorbing cotton is arranged close to the air release meshes; the B silencer has the same structure as the A silencer.

[0018] Further, in some embodiments, the A pump outlet of the double-head negative pressure A pump is in communication with the A silencer through a conduit, and the B pump outlet of the double-head negative pressure B pump is in communication with the B silencer through a conduit;

[0019] A three-way joint is arranged between the A pump inlet of the double-head negative pressure A pump and the second negative pressure suction joint, and the second negative pressure suction joint is connected to the A pump inlet of the double-head negative pressure A pump through the three-way joint; a proportional valve is arranged on the outside of the double-head negative pressure A pump, and the proportional valve is arranged on the base; the proportional valve is provided with a pressure measurement port and a negative pressure relief port; the A pump inlet of the double-head negative pressure A pump is connected to the pressure measurement port of the proportional valve through the three-way joint.

[0020] Further, in some embodiments, the negative pressure measuring plug seat is arranged on the machine base; the machine base is provided with a circuit board, and the circuit board is provided with a pressure sensor; and the negative pressure measuring plug seat is in conductive connection with the pressure sensor.

[0021] The negative pressure output joint is connected with the second waste liquid bottle through one of the conduits; the second waste liquid bottle is in conductive connection with the first waste liquid bottle; and the first waste liquid bottle is connected with the guide sheath through one of the conduits.

[0022] The second negative pressure suction joint is arranged on the machine base; and the second negative pressure suction joint is connected with the double-head negative pressure pump in the machine base.

[0023] The negative pressure monitoring protection bottle is provided with a liquid level sensor on one side close to the machine base; the liquid level sensor is arranged close to the negative pressure monitoring protection bottle; and the liquid level sensor is fixedly arranged on the outer sidewall of the shell of the machine base.

[0024] Further, in some embodiments, one end of the three-way joint is connected with the second negative pressure suction joint through a conduit; the other end of the three-way joint is connected with the A pump air inlet of the double-head negative pressure A pump through a conduit; and the remaining end of the three-way joint is connected with the pressure measuring port of the proportional valve through a conduit; the second negative pressure suction joint, the A pump air inlet of the double-head negative pressure A pump and the pressure measuring port of the proportional valve are in communication with each other through the three-way joint.

[0025] The machine base is provided with a mounting seat; the mounting seat is provided with shock-absorbing columns at the bottom of four corners; and the mounting seat is arranged on the machine base through the shock-absorbing columns.

[0026] The double-head negative pressure pump is arranged in the mounting seat; and the double-head negative pressure pump is arranged on the machine base through the mounting seat.

[0027] The application is used for a kidney pelvis lithotripsy operation, adopts a double-head negative pressure pump, and the double-head negative pressure pump is divided into a double-head negative pressure A pump and a double-head negative pressure B pump; the two pumps work simultaneously, but the double-head negative pressure pump has only one air inlet (an A pump air inlet), and the A pump air inlet is connected with a B pump air inlet through a conduit; but the double-head negative pressure pump has two separate air outlets, i.e., an A pump air outlet and a B pump air outlet. The two separate air outlets are connected with an A silencer and a B silencer respectively, and the negative pressure air outlet is directly divided into two independent A silencers and B silencers for silencing, so that the environmental interference during the operation can be reduced, and the silencing and shock-absorbing effects are improved.

[0028] The application protects the negative pressure drainage, connects a pressure sensor with the negative pressure monitoring protection bottle to measure pressure and monitor the safe negative pressure in real time; connects the double-head negative pressure pump with the liquid bottle to automatically remove the waste liquid; measures the water level with the liquid level sensor and sets the dangerous water level; when the waste liquid enters the negative pressure monitoring protection bottle, the double-head negative pressure pump automatically stops to avoid the damage of the equipment caused by water entering. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 A schematic diagram for use of an embodiment of the present application;

[0030] Figure 2 A schematic diagram of a pipeline for an embodiment of the present application;

[0031] Figure 3 A schematic diagram of a structure for an embodiment of the present application;

[0032] Figure 4 A cross-sectional structure of a negative pressure monitoring and protection bottle part of an embodiment of the present application;

[0033] Figure 5 A schematic diagram of a structure of a waste liquid bottle part of an embodiment of the present application;

[0034] Figure 6 A schematic diagram of a structure of a machine base part of an embodiment of the present application;

[0035] Figure 7 An exploded schematic diagram of a machine base part of an embodiment of the present application;

[0036] Figure 8 A cross-sectional structure diagram of a sound attenuation cylinder part of an embodiment of the present application;

[0037] Figure 9 A pipeline connection schematic diagram of a double-head negative pressure pump part of an embodiment of the present application. DETAILED DESCRIPTION

[0038] In order to further understand the features, technical means and specific purposes and functions achieved by the present application, and to analyze the advantages and spirits of the present application, the following detailed description of the present application is made in combination with the accompanying drawings and specific embodiments.

[0039] Please refer to the accompanying drawings, the present application comprises a machine base 11, the machine base 11 is provided with a double-head negative pressure pump 40, the double-head negative pressure pump 40 comprises a double-head negative pressure A pump 41 and a double-head negative pressure B pump 42, the double-head negative pressure A pump 41 is provided with an A pump air inlet 43 and an A pump air outlet 44, and the double-head negative pressure B pump 42 is provided with a B pump air inlet 45 and a B pump air outlet 46; the double-head negative pressure A pump 41 and the double-head negative pressure B pump 42 are arranged in series, and the A pump air inlet 43 of the double-head negative pressure A pump 41 is connected with the B pump air inlet 45 of the double-head negative pressure B pump 42 through a conduit 30.

[0040] A second negative pressure suction joint 32 is arranged on the side wall of the machine base 11, and the second negative pressure suction joint 32 is communicated with the A pump air inlet 43 of the double-head negative pressure A pump 41 through the conduit 30.

[0041] Further, in some embodiments, the machine base 11 is also provided with an A silencer 37 and a B silencer 38. The wall of the A silencer 37 is provided with an outwardly protruding A cylinder air inlet connector 48. The two ends of the A silencer 37 are provided with air venting mesh holes 39 (a plurality of air venting holes). The inner cavity of the A silencer 37 is provided with sound absorbing cotton 47 near the two ends. The sound absorbing cotton 47 is arranged adjacent to the air venting mesh holes 39. The B silencer 38 has the same structure as the A silencer 37.

[0042] The two ends of the A silencer 37 and the B silencer 38 are provided with air venting mesh holes 39. Negative pressure air outlet from the plurality of air venting holes at the two ends, the sound will be weakened, and the noise will be reduced.

[0043] The double-head negative pressure pump 40 is divided into a double-head negative pressure A pump 41 and a double-head negative pressure B pump 42. The two pumps work simultaneously, but the double-head negative pressure pump 40 has only one air inlet (A pump air inlet 43). The A pump air inlet 43 and the B pump air inlet 45 are connected through the conduit 30. However, the double-head negative pressure pump 40 has two separate air outlets, namely the A pump air outlet 44 and the B pump air outlet 46. The two separate air outlets achieve the effect of reducing air pressure sound and weakening air pressure sound, thereby achieving silencing.

[0044] The A pump air outlet 44 of the double-head negative pressure A pump 41 is communicated with the A cylinder air inlet connector 48 of the A silencer 37 through the conduit 30. The B pump air outlet 46 of the double-head negative pressure B pump 42 is communicated with the B cylinder air inlet connector 49 of the B silencer 38 through the conduit 30.

[0045] Further, in some embodiments, the A pump air inlet 43 of the double-head negative pressure A pump 41 is provided with a three-way connector 33. The second negative pressure suction connector 32 is connected to the A pump air inlet 43 of the double-head negative pressure A pump 41 through the three-way connector 33. The outer side of the double-head negative pressure A pump 41 is provided with a proportional valve 34. The proportional valve 34 is arranged on the machine base 11. The proportional valve 34 is provided with a pressure measuring port 35 and a negative pressure relief port 36. The A pump air inlet 43 of the double-head negative pressure A pump 41 is connected to the pressure measuring port 35 of the proportional valve 34 through the three-way connector 33.

[0046] After the second negative pressure suction connector 32 introduces negative pressure, the negative pressure will pass through the three-way connector 33, and then pass through the three-way connector 33 to connect the proportional valve 34 and the double-head negative pressure pump 40.

[0047] One end of the three-way connector 33 is connected to the second negative pressure suction connector 32 through the conduit 30. The other end of the three-way connector 33 is connected to the A pump air inlet 43 of the double-head negative pressure A pump 41 through the conduit 30. The remaining end of the three-way connector 33 is connected to the pressure measuring port 35 of the proportional valve 34 through the conduit 30. The second negative pressure suction connector 32, the A pump air inlet 43 of the double-head negative pressure A pump 41, and the pressure measuring port 35 of the proportional valve 34 are communicated with each other through the three-way connector 33.

[0048] The proportional valve 34 is provided with a negative pressure relief port 36, and the proportional valve 34 is used to control the pressure. When the pressure of the negative pressure is high, the negative pressure relief port 36 of the proportional valve 34 is opened to release the pressure; when the pressure of the negative pressure is not higher than the set value, the negative pressure relief port 36 of the proportional valve 34 is closed; and the pressure of the negative pressure is controlled by controlling the opening and closing of the proportional valve 34.

[0049] The pressure port 35 of the proportional valve 34 is connected with the air inlet of the double-head negative pressure pump 40, and when the pressure of the negative pressure is too high, the negative pressure relief port 36 of the proportional valve 34 is opened to release the pressure.

[0050] The equipment end negative pressure input joint 56 is connected with the negative pressure suction plug 31 through the negative pressure guide pipe, and the negative pressure suction plug 31 is inserted into the second negative pressure suction joint 32.

[0051] The guide sheath 14 is connected with the double-head negative pressure pump 40, and the double-head negative pressure pump 40 generates negative pressure suction to suck the gravel and waste liquid at the tip of the guide sheath 14; the first waste liquid bottle 21 and the second waste liquid bottle 22 are arranged between the guide sheath 14 and the double-head negative pressure pump 40, and the waste liquid is sucked into the first waste liquid bottle 21 and the second waste liquid bottle 22.

[0052] The mounting seat 51 is arranged on the base 11, the bottom of the mounting seat 51 is provided with four shock-absorbing columns 52, the mounting seat 51 is arranged on the base 11 through the shock-absorbing columns 52, and the double-head negative pressure pump 40 is arranged in the mounting seat 51.

[0053] The A pump air outlet 44 and the B pump air outlet 46 are connected with the A silencer 37 and the B silencer 38 respectively, the negative pressure air outlet is directly connected with the two independent A silencer 37 and B silencer 38 for silencing, and the silencing and shock-absorbing effects are improved.

[0054] During the endoscopic lithotripsy surgery, the physiological saline in the flushing container 12 is flushed into the abdominal cavity through the endoscope 13, and the flushing liquid is sucked into the waste liquid bottles (the first waste liquid bottle 21 and the second waste liquid bottle 22) through the guide sheath 14; during the flushing liquid (waste liquid) suction process, the second waste liquid bottle 22 is connected with the double-head negative pressure pump 40, the double-head negative pressure pump 40 generates negative pressure suction, gravel and waste liquid are sucked at the tip of the guide sheath 14, and the surgery is completed.

[0055] The base 11 is provided with a negative pressure monitoring protection bottle 53, the top of the negative pressure monitoring protection bottle 53 is provided with an equipment end negative pressure input joint 56, a negative pressure output joint 57 and a negative pressure pressure measuring joint 58, and the equipment end negative pressure input joint 56, the negative pressure output joint 57 and the negative pressure pressure measuring joint 58 are connected with the cavity of the negative pressure monitoring protection bottle 53.

[0056] Furthermore, in some embodiments, the negative pressure monitoring protection bottle 53 is disposed on the outer side of the rear wall of the base 11; the negative pressure input connector 56, the negative pressure output connector 57, and the negative pressure measuring connector 58 at the device end are disposed independently and separately on the top of the negative pressure monitoring protection bottle 53.

[0057] Furthermore, in some embodiments, the negative pressure input connector 56 and the negative pressure measuring connector 58 are symmetrically and coaxially arranged in opposite directions on the top of the negative pressure monitoring protection bottle 53.

[0058] The negative pressure input connector 56 at the device end is connected to the second negative pressure suction connector 32 through one of the conduits 30, and the negative pressure measuring connector 58 is connected to the negative pressure measuring plug socket 55 through one of the conduits 30. The negative pressure measuring plug socket 55 is set on the base 11. The base 11 is provided with a circuit board 28, and the circuit board 28 is provided with a pressure sensor 29. The negative pressure measuring plug socket 55 is electrically connected to the pressure sensor 29.

[0059] Furthermore, in some embodiments, the negative pressure output connector 57 is connected to the second waste liquid bottle 22 through one of the conduits 30, the second waste liquid bottle 22 and the first waste liquid bottle 21 are connected in a dual-bottle conductive connection, and the first waste liquid bottle 21 is connected to the guide sheath 14 through one of the conduits 30.

[0060] Furthermore, in some embodiments, a second negative pressure suction connector 32 is disposed on the base 11, and the second negative pressure suction connector 32 is connected to the dual-head negative pressure pump 40 in the base 11.

[0061] A liquid level sensor 54 is provided on the bottom side of the negative pressure monitoring and protection bottle 53 near the base 11. The liquid level sensor 54 is located close to the negative pressure monitoring and protection bottle 53 and is fixedly installed on the outer wall of the housing of the base 11.

[0062] See appendix Figure 4 As shown, the negative pressure output inlet 59 on the negative pressure output connector 57 is located at the bottom of the cavity of the negative pressure monitoring and protection bottle 53.

[0063] Furthermore, in some embodiments, see the appendix. Figure 5 As shown, the top of the first waste liquid bottle 21 is provided with a patient-end negative pressure tube connector 23 and a drain connector 24 separated by space. The top of the second waste liquid bottle 22 is provided with a negative pressure transmission connector 26 and a first negative pressure suction connector 27 separated by space. The patient-end negative pressure tube connector 23 is connected to the guide sheath 14 through one of the conduits 30. A one-way valve 25 is provided on the patient-end negative pressure tube connector 23 at the bottom of the cavity of the first waste liquid bottle 21. The drain connector 24 on the first waste liquid bottle 21 is connected to the negative pressure transmission connector 26 on the patient-end negative pressure tube connector 23 through one of the conduits 30. The first negative pressure suction connector 27 on the second waste liquid bottle 22 is connected to the negative pressure output connector 57 on the negative pressure monitoring and protection bottle 53 through one of the conduits 30.

[0064] Device end negative pressure pipe joint 56: connect the double head negative pressure pump 40 of the equipment (machine base 11) through the second negative pressure suction joint 32.

[0065] Liquid level sensor 54: protect the machine equipment from sucking in waste liquid to cause danger; when the waste liquid enters the negative pressure monitoring protection bottle 53 from the negative pressure delivery joint 57 (port), the liquid level sensor 54 detects that the liquid enters the negative pressure monitoring protection bottle 53, so as to close the double head negative pressure pump 40 to stop negative pressure suction, and the infusion function screen has a prompt.

[0066] Negative pressure monitoring protection bottle 53: the pressure measuring bottle adopts a three-way bottle, the device end negative pressure input joint 56 (port) at the top of the bottle is connected to the second negative pressure suction joint 32 of the equipment (machine base 11), the negative pressure output joint 57 (port) is connected to the waste liquid collection bottle (second waste liquid bottle 22), and the negative pressure measuring joint 58 (negative pressure monitoring port) is connected to the pressure sensor 29 on the circuit board 28.

[0067] First waste liquid bottle 21: patient end negative pressure pipe joint 23 (interface) connected to guide sheath 14, first waste liquid bottle 21 and second waste liquid bottle 22 are connected through conduit 30, and patient end negative pressure pipe joint 23 (interface) is provided with one-way valve 25.

[0068] Negative pressure measuring joint 58 (port): drawn from the negative pressure monitoring protection bottle 53, connected to the pressure sensor 29 on the equipment circuit board 28, and real-time monitoring of suction negative pressure.

[0069] In the endoscopic lithotripsy surgery, the physiological saline in the irrigation container 12 is hit into the renal pelvis through the endoscope 13, the abdominal cavity is flushed and the stones are crushed through the endoscope 13; the waste liquid in the renal pelvis is connected to the first waste liquid bottle 21 through the negative pressure pipe of the guide sheath 14 and the negative pressure suction pipe (conduit 30), the guide sheath 14 sucks the flushed waste liquid into the first waste liquid bottle 21; after the flushing liquid (waste liquid) is sucked into the first waste liquid bottle 21, the first waste liquid bottle 21 and the second waste liquid bottle 22 are connected to the second negative pressure suction joint 32 on the equipment (machine base 11) through one of the conduits 30 and the negative pressure monitoring protection bottle 53, and negative pressure suction is generated by the double head negative pressure pump 40 of the equipment (machine base 11), the second negative pressure suction joint 32 is connected to the double head negative pressure pump 40, the guide sheath 14 sucks the stones and waste liquid at the tip, and the operation is completed.

[0070] When the second waste liquid bottle 22 is filled and the replacement is forgotten, the waste liquid will be sucked into the negative pressure monitoring protection bottle 53 from the negative pressure silica gel pipe (the conduit 30), at this time, the liquid level sensor 54 beside the negative pressure monitoring protection bottle 53 will detect that the waste liquid enters the bottle, then the device will stop the double-head negative pressure pump 40 immediately, the perfusion and negative pressure suction function are suspended, and the screen will have a prompt of waste liquid backflow; at this time, the negative pressure monitoring protection bottle 53 (the negative pressure monitoring buffer protection bottle) should be checked immediately whether the waste liquid enters, if the waste liquid enters, the waste should be replaced immediately, and the accumulated water in the negative pressure silica gel pipe (the conduit 30) and the negative pressure monitoring protection bottle 53 is cleaned before the device is started again, so as to prevent the waste liquid from being sucked into the machine from the negative pressure monitoring protection bottle 53 to damage the machine or cause danger.

[0071] The waste liquid automatic suction and safety protection device of the present application: the pressure sensor 29 measures pressure, and the safety negative pressure is monitored in real time; the liquid level sensor 54 measures the water level, when the waste liquid in the second waste liquid bottle 22 is overfilled, the waste liquid enters the negative pressure monitoring protection bottle 53, the double-head negative pressure pump 40 is stopped, and the device is prevented from being damaged by water.

[0072] The above examples only express several preferred embodiments of the present application, the description is more specific and detailed, and for ordinary skilled in the art, several modifications and improvements can be made without departing from the concept of the present application, which all belong to the protection scope of the appended claims of the present application.

Claims

1. An endoscope irrigation-aspiration apparatus negative pressure suction system, comprising: The machine base (11) is characterized in that the machine base (11) is provided with a double-head negative pressure pump (40), the double-head negative pressure pump (40) comprises a double-head negative pressure A pump (41) and a double-head negative pressure B pump (42), the double-head negative pressure A pump (41) is provided with an A pump air inlet (43) and an A pump air outlet (44), and the double-head negative pressure B pump (42) is provided with a B pump air inlet (45) and a B pump air outlet (46); the double-head negative pressure A pump (41) and the double-head negative pressure B pump (42) are arranged in series, and the A pump air inlet (43) of the double-head negative pressure A pump (41) is connected with the B pump air inlet (45) of the double-head negative pressure B pump (42) through a pipeline (30); The machine base (11) is further provided with an A silencer (37) and a B silencer (38), the double-head negative pressure A pump (41) is connected with the A silencer (37), and the double-head negative pressure B pump (42) is connected with the B silencer (38); The machine base (11) is further provided with a negative pressure monitoring protection bottle (53), the top of the negative pressure monitoring protection bottle (53) is provided with an equipment end negative pressure input connector (56), a negative pressure output connector (57) and a negative pressure pressure measurement connector (58), and the equipment end negative pressure input connector (56), the negative pressure output connector (57) and the negative pressure pressure measurement connector (58) are connected with the cavity of the negative pressure monitoring protection bottle (53) and are mutually penetrated; The equipment end negative pressure input connector (56) is connected with the second negative pressure suction connector (32) through one of the pipelines (30), and the negative pressure pressure measurement connector (58) is connected with a negative pressure pressure measurement plug seat (55) through one of the pipelines (30); The negative pressure output inlet (59) on the negative pressure output connector (57) is arranged at the bottom of the cavity of the negative pressure monitoring protection bottle (53); The negative pressure monitoring protection bottle (53) is arranged on the outer side of the rear wall of the machine base (11); The equipment end negative pressure input connector (56), the negative pressure output connector (57) and the negative pressure pressure measurement connector (58) are independently arranged on the top of the negative pressure monitoring protection bottle (53); The equipment end negative pressure input connector (56) and the negative pressure pressure measurement connector (58) are coaxially and oppositely arranged on the top of the negative pressure monitoring protection bottle (53); The top of the first waste liquid bottle (21) is provided with a patient end negative pressure pipe connector (23) and a liquid discharge connector (24) which are spaced apart, and the top of the second waste liquid bottle (22) is provided with a negative pressure transmission connector (26) and a first negative pressure suction connector (27) which are spaced apart, and the patient end negative pressure pipe connector (23) is connected with the guide sheath (14) through one of the pipelines (30); The patient end negative pressure pipe connector (23) is provided with a one-way valve (25) at the bottom of the cavity of the first waste liquid bottle (21); the liquid discharge connector (24) on the first waste liquid bottle (21) is in conductive connection with the negative pressure transmission connector (26) on the patient end negative pressure pipe connector (23) through one of the pipelines (30), and the first negative pressure suction connector (27) on the second waste liquid bottle (22) is in conductive connection with the negative pressure output connector (57) on the negative pressure monitoring protection bottle (53) through one of the pipelines (30).

2. The negative pressure suction system of an endoscope washing and suction apparatus according to claim 1, wherein The A pump outlet (44) of the double-head negative pressure A pump (41) is communicated with the A muffler (37) through a conduit (30), and the B pump outlet (46) of the double-head negative pressure B pump (42) is communicated with the B muffler (38) through the conduit (30); A second negative pressure suction joint (32) is arranged on the side wall of the machine base (11), and the second negative pressure suction joint (32) is communicated with the A pump inlet (43) of the double-head negative pressure A pump (41) through a conduit (30); The A muffler (37) is provided with an outwardly protruding A cylinder gas inlet joint (48) on the cylinder wall, and the two ends of the A muffler (37) are provided with gas discharge meshes (39), and the A muffler (37) is provided with sound-absorbing cotton (47) close to the two ends in the inner cavity, and the sound-absorbing cotton (47) is arranged close to the gas discharge meshes (39); the B muffler (38) has the same structure as the A muffler (37).

3. The negative pressure suction system of an endoscope washing and suction apparatus according to claim 1, wherein The A pump outlet (44) of the double-head negative pressure A pump (41) is communicated with the A cylinder gas inlet joint (48) of the A muffler (37) through a conduit (30), and the B pump outlet (46) of the double-head negative pressure B pump (42) is communicated with the B cylinder gas inlet joint (49) of the B muffler (38) through the conduit (30); A three-way joint (33) is arranged between the A pump inlet (43) of the double-head negative pressure A pump (41) and the second negative pressure suction joint (32), and the second negative pressure suction joint (32) is connected to the A pump inlet (43) of the double-head negative pressure A pump (41) through the three-way joint (33); a proportional valve (34) is arranged on the outer side of the double-head negative pressure A pump (41), and the proportional valve (34) is arranged on the machine base (11); the proportional valve (34) is provided with a pressure measuring port (35) and a negative pressure relief port (36); the A pump inlet (43) of the double-head negative pressure A pump (41) is connected to the pressure measuring port (35) of the proportional valve (34) through the three-way joint (33).

4. The negative pressure suction system of an endoscope washing and suction apparatus according to claim 1, wherein The negative pressure measuring plug seat (55) is arranged on the machine base (11); the machine base (11) is provided with a circuit board (28), and the circuit board (28) is provided with a pressure sensor (29); the negative pressure measuring plug seat (55) is in conductive connection with the pressure sensor (29); The negative pressure output joint (57) is connected to the second waste liquid bottle (22) through one of the conduits (30), the second waste liquid bottle (22) is in conductive connection with the first waste liquid bottle (21), and the first waste liquid bottle (21) is connected to the guide sheath (14) through one of the conduits (30); The second negative pressure suction joint (32) is arranged on the machine base (11), and the second negative pressure suction joint (32) is connected to the double-head negative pressure pump (40) in the machine base (11); The bottom of the negative pressure monitoring protection bottle (53) is provided with a liquid level sensor (54) close to one side of the machine base (11), and the liquid level sensor (54) is arranged close to the negative pressure monitoring protection bottle (53); the liquid level sensor (54) is fixedly arranged on the outer side wall of the shell of the machine base (11).

5. The negative pressure suction system of an endoscope washing and suction apparatus according to claim 3, wherein One end of the tee joint (33) is connected with the second negative pressure suction joint (32) through a conduit (30), the other end of the tee joint (33) is connected with the A pump air inlet (43) of the double-head negative pressure A pump (41) through a conduit (30), and the remaining end of the tee joint (33) is connected with the pressure measuring port (35) of the proportional valve (34) through a conduit (30); the second negative pressure suction joint (32), the A pump air inlet (43) of the double-head negative pressure A pump (41) and the pressure measuring port (35) of the proportional valve (34) are communicated with each other through the tee joint (33); The mounting seat (51) is provided on the machine base (11), and the four corners of the bottom end of the mounting seat (51) are provided with shock columns (52), and the mounting seat (51) is arranged on the machine base (11) through the shock columns (52); The double-head negative pressure pump (40) is arranged in the mounting seat (51), and the double-head negative pressure pump (40) is arranged on the machine base (11) through the mounting seat (51).

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