CN111365487A - Negative pressure control valve and corresponding endoscope - Google Patents

Negative pressure control valve and corresponding endoscope Download PDF

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Publication number
CN111365487A
CN111365487A CN202010298446.2A CN202010298446A CN111365487A CN 111365487 A CN111365487 A CN 111365487A CN 202010298446 A CN202010298446 A CN 202010298446A CN 111365487 A CN111365487 A CN 111365487A
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CN
China
Prior art keywords
negative pressure
pressure control
control valve
valve body
interface
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Pending
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CN202010298446.2A
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Chinese (zh)
Inventor
岑磊
千行军
徐睿
赵彤
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Shanghai Outai Medical Equipment Co ltd
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Shanghai Outai Medical Equipment Co ltd
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Application filed by Shanghai Outai Medical Equipment Co ltd filed Critical Shanghai Outai Medical Equipment Co ltd
Priority to CN202010298446.2A priority Critical patent/CN111365487A/en
Publication of CN111365487A publication Critical patent/CN111365487A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • F16K11/0716—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides with fluid passages through the valve member
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
    • A61B1/012—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor characterised by internal passages or accessories therefor
    • A61B1/015—Control of fluid supply or evacuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Surgery (AREA)
  • Mechanical Engineering (AREA)
  • Biomedical Technology (AREA)
  • Molecular Biology (AREA)
  • Pathology (AREA)
  • Optics & Photonics (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Radiology & Medical Imaging (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
  • Biophysics (AREA)
  • Endoscopes (AREA)

Abstract

The invention relates to a negative pressure control valve, which comprises a hollow valve body, wherein the side wall of the hollow valve body is provided with a first interface and a second interface; the valve core is movably arranged in the inner cavity of the hollow valve body and comprises a first matching port matched with the first interface, a second matching port matched with the second interface and a channel for communicating the first matching port with the second matching port, and the valve core is provided with a first stop block matched with the first interface and a second stop block matched with the second interface; the negative pressure control valve is set to have a closed state and a through state, in the closed state, the first interface corresponds to the first stop block, and the second interface corresponds to the second stop block, so that the first interface and the second interface are not communicated; in a through state, the first interface corresponds to the first matching port, and the second interface corresponds to the second matching port, so that the first interface is communicated with the second interface.

Description

Negative pressure control valve and corresponding endoscope
Technical Field
The invention relates to the technical field of medical instruments, in particular to a negative pressure control valve and a corresponding endoscope.
Background
Along with the development of society, the improvement of the life of people and the improvement of consciousness of medical care brought by the improvement of the life of people, the cognition of people on the examination and the general survey acceptance of the endoscope is continuously improved. Therefore, endoscopy has become an important medical instrument in clinical medicine. The examination and treatment of endoscopes become more and more mature after the development of clinical use in China, the cleaning and disinfection work after each product use is important work content which cannot be ignored all the time except the use and examination, and the avoidance of cross infection caused by improper cleaning and disinfection is also an important link for the maintenance of endoscopes. However, since endoscopes are a precise and complicated product according to different use positions, and although the design considers the convenience of use and operation and avoids the complexity to achieve the cleaning and disinfection functions, careful consideration is given to material selection and structure design.
The main products of the existing endoscope comprise a nasopharyngoscope, a bronchoscope, a choledochoscope, a pyeloscope, a cystoscope, a digestive tract, a thoracoscope and the like, the endoscope products are all provided with working channels for image display, insertion part, bending angle and sampling treatment, and channels for water supply, air supply and suction for cleaning the surface of the endoscope are needed for keeping the image clear.
In the process of endoscope examination and diagnosis, maintaining clear observation of images and removing mucous membranes, blood and liquid which affect the observed images are important functions which need to be achieved by suction. Therefore, cleaning and disinfecting the endoscope pipeline after use, especially the repeated use of the suction button after cleaning and disinfection, is a very important task. It must be avoided that stains remain in the wall causing cross-contamination. Of course, some endoscopes do not require a suction function, and do not have a suction button.
Considering the factors of avoiding cross infection and clinically acceptable cost caused by improper cleaning and disinfection of the attraction button, the risk is fully avoided in the design of the product in advance, and the appearance of the product with the risk is prevented from coming into the market from the source, which is an important factor of the invention.
Disclosure of Invention
The main object of the present invention is to provide a disposable negative pressure control valve and a corresponding endoscope.
In order to achieve the above object, the present invention adopts the following technical solution: the method comprises the following steps:
the side wall of the hollow valve body is provided with a first connector and a second connector;
the valve core is movably arranged in the inner cavity of the hollow valve body and comprises a first matching port matched with the first interface, a second matching port matched with the second interface and a channel for communicating the first matching port with the second matching port, and the valve core is provided with a first stop block matched with the first interface and a second stop block matched with the second interface;
the negative pressure control valve is set to have a closed state and a through state, in the closed state, the first interface corresponds to the first stop block, and the second interface corresponds to the second stop block, so that the first interface and the second interface are not communicated; the first end of the valve core is operated to move the valve core relative to the hollow valve body, the negative pressure control valve is switched to be in a through state, in the through state, the first interface corresponds to the first matching port, and the second interface corresponds to the second matching port, so that the first interface and the second interface are communicated.
Preferably, the negative pressure control valve comprises a button, the button is arranged at the first end of the hollow valve body and is connected with the first end of the valve core, an elastic element is arranged between the button and the first end of the hollow valve body, and the negative pressure control valve keeps a closed state when the button is not operated by the elastic force of the elastic element; by pressing the button, the valve core is moved relative to the hollow valve body, and the negative pressure control valve is switched to be in a through state.
Preferably, the button is provided with a first sealing inclined surface, the first end of the hollow valve body is provided with a first matching inclined surface matched with the first sealing inclined surface, and when the negative pressure control valve is in a through state, the first sealing inclined surface is contacted with the first matching inclined surface, so that the button and the first end of the hollow valve body are sealed.
Preferably, the first end of the valve core is provided with a third stop dog, the third stop dog is an annular stop dog, and the outer diameter of the third stop dog is matched with the inner diameter of the first end of the hollow valve body.
Preferably, the first stopper has an extension portion, the extension portion is provided with at least one protrusion, the inner cavity of the hollow valve body is provided with a guide groove matched with the protrusion, the protrusion moves along the guide groove, and when the button is not operated, the protrusion is limited on the end wall of the guide groove by the elastic force of the elastic member, so that the negative pressure control valve keeps a closed state.
Preferably, the second stopper is disposed at the second end of the valve element, the first stopper is disposed between the first end of the valve element and the second stopper, a second mating opening is disposed between the first stopper and the second stopper, and a first mating opening is disposed between the first end of the valve element and the first stopper.
Preferably, the first stopper and the second stopper are both annular stoppers, the outer diameter of the second stopper is set to be larger than that of the first stopper, the second stopper is provided with a second sealing inclined surface, the inner cavity of the hollow valve body is provided with a second matching inclined surface matched with the second sealing inclined surface, and when the negative pressure control valve is in a closed state, the second sealing inclined surface is in contact with the second matching inclined surface, so that the second end of the valve core and the hollow valve body are sealed.
Preferably, the negative pressure control valve includes a valve seat disposed at the second end of the hollow valve body.
Preferably, the negative pressure control valve includes a base disposed between the valve seat and the second end of the hollow valve body to sealingly couple the valve seat and the second end of the hollow valve body.
The invention provides an endoscope, which is provided with the negative pressure control valve, wherein a first interface is connected with a suction channel of the endoscope, and a second interface is connected with a suction pump.
The negative pressure control valve adopts a novel design scheme, reduces the cost, can be discarded after being used safely, avoids the risk of cross infection and reduces the potential risk to zero.
Drawings
FIG. 1 is an exploded view of the negative pressure control valve of the present invention.
FIG. 2 is a first perspective view of the negative pressure control valve of the present invention after assembly.
FIG. 3 is a second perspective view of the negative pressure control valve of the present invention after assembly.
FIG. 4a is a first cross-sectional view of the negative pressure control valve of the present invention in the closed position after assembly.
FIG. 4b is a second cross-sectional view of the negative pressure control valve of the present invention in the closed position after assembly.
FIG. 5a is a first cross-sectional view in the through-state of the negative pressure control valve of the present invention after assembly.
Fig. 5b is a second sectional view in the direction of penetration of the negative pressure control valve of the present invention after assembly.
Detailed Description
In order to clearly understand the technical contents of the present invention, the following examples are given in detail.
Endoscopes have been commonly used in various medical departments as conventional products due to medical advances. The suction function is a basic indispensable function of each endoscope. Since endoscopes are examination instruments that enter different patient cavities, the endoscope must be rigorously sterilized after use to reduce cross-contamination. Wherein, due to the requirement of the internal structure and function of the suction button, the suction button must be completely decomposed and then cleaned and disinfected one by one during disinfection. However, due to structural design, or carelessness of possible cleaning and disinfection, cross-contamination may occur if stains are easily left without reaching sufficient cleaning and disinfection. Causing unnecessary potential medical disputes.
On the basis of fully understanding the principle of the suction valve body, the invention combines simple air flow and pressure forming state in a sealing state, designs the unit functions of all parts into unique functions, and then combines all monomers into a suction assembly body with a complete suction function, thereby becoming an important part in the endoscope. Due to the adoption of a novel design scheme and the reduction of the cost, the disposable component can be discarded after being used safely, so that the risk of cross infection is avoided. The potential risk is reduced to zero.
As shown in fig. 1 to 5b, a negative pressure control valve according to an embodiment of the present invention mainly includes the following components:
the valve comprises a hollow valve body 1, wherein the hollow valve body 1 is provided with an outer shell and an inner cavity, and a first connector 2 and a second connector 3 are arranged on the side wall of the outer shell;
the valve core 4 is movably arranged in the inner cavity of the hollow valve body 1, the valve core 4 comprises a first matching port 5 matched with the first connector 2, a second matching port 6 matched with the second connector 3 and a channel 7 (shown in fig. 4a and 4 b) for communicating the first matching port 5 with the second matching port 6, and the valve core 4 is further provided with a first stop 8 matched with the first connector 2 and a second stop 9 matched with the second connector 3;
the negative pressure control valve is set to have a closed state and a through state, in the closed state, as shown in fig. 4a, the first port 2 corresponds to the first stop 8, as shown in fig. 4b, the second port 3 corresponds to the second stop 9, and therefore, the first port 2 and the second port 3 are not communicated; in the through state, as shown in fig. 5a, the first port 2 corresponds to the first engagement port 5, and as shown in fig. 5b, the second port 3 corresponds to the second engagement port 6, so that the first port 2 and the second port 7 communicate with each other, and in the through state, the negative pressure control valve can perform a suction function. The negative pressure control valve can be switched to a through state by moving the valve body 4 relative to the hollow valve body 1 by operating the upper end of the valve body 4.
As shown in fig. 2 to 3, one of the two connectors provided in the present invention may be used to connect a suction channel of an endoscope, and the other may be used to connect a suction tube of a suction pump, the connector is a circular hole with a certain area, and the inner aperture area is equal to the inner diameter of the conventional suction tube, for example, the commonly used inner diameter of 3 mm. For sealing and connection purposes, the two connections are arranged one above the other in the axial direction and are oriented differently, in the embodiment provided by the invention, the orientation of the two connections differs by 90 °. According to the positions of the two interfaces, the positions of a first stop block and a second stop block are correspondingly arranged, as shown in fig. 1, the second stop block 9 is arranged at the lower end of the valve core 4, the first stop block 8 is arranged between the upper end of the valve core 4 and the second stop block 9, a second matching port 6 is arranged between the first stop block 8 and the second stop block 9, and a first matching port 5 is arranged between the upper end of the valve core 4 and the first stop block 8. The positions of the first matching port 5, the second matching port 6, the first stop 8 and the second stop 9 can be adjusted correspondingly according to the positions of the first interface 2 and the second interface 3.
As shown in fig. 4a to 5b, the first and second fitting ports 5 and 6 are provided to penetrate both sides of the valve body in a lateral direction and have an annular opening to increase the flow rate and flow rate of the liquid.
As shown in fig. 1, the negative pressure control valve includes a button 10, the button 10 is disposed at the upper end of the hollow valve body 1, the button 10 is connected to the upper end of the valve core 4, and an elastic member 11 is disposed between the button 10 and the upper end of the hollow valve body 1. The elastic member 11 may be a silicone elastic ring or a spring, and the sealing connection between the button 10 and the elastic member 11, and between the elastic member 11 and the upper end of the hollow valve body 11 may be conveniently achieved.
As shown in fig. 4a and 4b, when the button 10 is not operated, the button 10 is supported by the elastic force generated by the elastic member 11, so that the negative pressure control valve can be always kept in a closed state; as shown in fig. 5a and 5b, the push button 10 is pressed to move the valve core 4 relative to the hollow valve body 1, so that the matching port in the valve core 4 corresponds to the interface, the two interfaces are conducted, and the negative pressure control valve is switched to be in a through state; when the button 10 is released, the button 10 is automatically reset by the elastic force of the elastic member 11, and is switched to the closed state.
As shown in fig. 1, 4b and 5b, the first stop 8 has an extension part, the extension part is provided with two protruding parts 19, the inner cavity of the hollow valve body 1 is provided with a guide groove 20 matched with the protruding parts 19, and the protruding parts 19 move along the guide groove 20, so that the movement of the valve core 4 in the inner cavity of the hollow valve body 1 is guided, and the valve core 4 is ensured not to be deviated when moving up and down.
When the button 10 is not operated, the protruding part 19 abuts against the upper end wall of the guide groove 20 by the elastic force of the elastic part 11, so that the valve core 4 is limited relative to the hollow valve body 1, and the negative pressure control valve is kept in a closed state.
As shown in fig. 4a and 5a, the button 10 is provided with a first sealing inclined surface 14, the upper end of the hollow valve body 1 is provided with a first matching inclined surface 15 matched with the first sealing inclined surface 14, and when the negative pressure control valve is in a through state, the first sealing inclined surface 14 is contacted with the first matching inclined surface 15, so that the button 10 is sealed with the upper end of the hollow valve body 1.
In order to further realize the sealing of the upper end of the hollow valve body, a third stop block 18 is arranged at the upper end of the valve core 4, the third stop block 18 is an annular stop block, and the outer diameter of the third stop block 18 is matched with the inner diameter of the upper end of the hollow valve body 1.
As shown in fig. 1, the first stopper 8 and the second stopper 9 are both annular stoppers, so that the valve core 4 is a special-shaped cylinder.
As shown in fig. 4a to 5a, the outer diameter of the second stopper 9 is set to be larger than the outer diameter of the first stopper 8, the second stopper 9 is provided with a second sealing inclined surface 16, and the inner cavity of the hollow valve body 1 is provided with a second matching inclined surface 17 matching with the second sealing inclined surface 16. As shown in fig. 4a and 4b, when the negative pressure control valve is in a closed state, the second sealing inclined surface 16 contacts the second mating inclined surface 17, so that the lower end of the valve core 4 is sealed with the hollow valve body 1. The liquid flow has smoothness, and the inclined fan-shaped structure of the second stop 9 is convenient to form a basically closed state with the convex inclined plane in the circular valve body.
In order to realize the further sealing of the lower end of the hollow valve body 1, the negative pressure control valve comprises a valve seat 13 and a base 12, and the base 12 is arranged between the valve seat 13 and the lower end of the hollow valve body 1 so as to connect the valve seat 13 and the lower end of the hollow valve body 1 in a sealing way.
In order to facilitate the installation between the lower ends of the valve seat 13 and the hollow valve body 1, the lower end of the hollow valve body 1 is provided with a positioning column 21, and the valve seat is provided with a sliding chute 22 matched with the positioning column 21 so as to ensure the stability between the lower ends of the valve seat 13 and the hollow valve body 1.
The negative pressure control valve provided by the invention can be conveniently processed into disposable articles through structural design, is suitable for an endoscope to realize the suction function of the endoscope, and when in use, the first interface 2 is connected with a suction channel of the endoscope, and the second interface 3 is connected with a suction pump.
When the elastic piece is in the original position, the inside irregular cylinder moving up and down forms a non-through state with the channel openings at the left and right positions on the circular valve body, at the moment, even if a negative pressure device is connected to one end to absorb the liquid body, the two channels cannot be communicated because of the sealing state in the circular valve body, and negative pressure is formed in the cavity at the moment, so that a drawing force is generated, the valve core is attracted, the second sealing inclined surface 16 and the second matching inclined surface 17 are attached, and the sealing effect is improved. When the special-shaped cylinder is pressed downwards through the external button, the left channel and the right channel in the circular valve body are communicated after the special-shaped cylinder moves, the air gap between the special-shaped cylinder and the valve body is prevented from forming a sealing state in the valve body by the aid of the position of the special-shaped cylinder, the left channel and the right channel are communicated by the aid of the negative pressure of the suction pump passing through the internal gap of the special-shaped cylinder, the pressure in the sealing state in the valve body is continuously increased, liquid connected with the other end of the valve body can be extracted along with the increase of the negative pressure and the movement of the negative pressure to the other end, and the purpose and the.
The negative pressure control valve adopts a novel design scheme, reduces the cost, can be discarded after being used safely, avoids the risk of cross infection and reduces the potential risk to zero.
Therefore, the product of the invention is an ideal product which is simple, has no reduced function, has no difference with the use of the traditional endoscope suction button and reduces medical disputes.
In this specification, the invention has been described with reference to specific embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader spirit and scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.

Claims (10)

1. A negative pressure control valve, comprising:
the side wall of the hollow valve body is provided with a first connector and a second connector;
the valve core is movably arranged in the inner cavity of the hollow valve body and comprises a first matching port matched with the first interface, a second matching port matched with the second interface and a channel for communicating the first matching port with the second matching port, and the valve core is provided with a first stop block matched with the first interface and a second stop block matched with the second interface;
the negative pressure control valve is set to have a closed state and a through state, in the closed state, the first interface corresponds to the first stop block, and the second interface corresponds to the second stop block, so that the first interface and the second interface are not communicated; the first end of the valve core is operated, the valve core is moved relative to the hollow valve body, the negative pressure control valve is switched to be in a through state, in the through state, the first interface corresponds to the first matching port, and the second interface corresponds to the second matching port, so that the first interface and the second interface are communicated.
2. The negative pressure control valve of claim 1, wherein the negative pressure control valve comprises a button disposed at a first end of the hollow valve body and connected to a first end of the spool, and an elastic member is disposed between the button and the first end of the hollow valve body, and the negative pressure control valve is maintained in a closed state by an elastic force of the elastic member when the button is not operated; by pressing the button, the valve core is moved relative to the hollow valve body, and the negative pressure control valve is switched to be in a through state.
3. The negative pressure control valve of claim 2, wherein the button is provided with a first sealing slope, the first end of the hollow valve body is provided with a first mating slope that mates with the first sealing slope, and the first sealing slope contacts the first mating slope when the negative pressure control valve is in a through state, such that the button is sealed from the first end of the hollow valve body.
4. The negative pressure control valve of claim 2, wherein the first end of the spool is provided with a third stop, the third stop being an annular stop, the third stop having an outer diameter matching the inner diameter of the first end of the hollow valve body.
5. The negative pressure control valve of claim 2, wherein the first stopper has an extension portion, the extension portion is provided with at least one protrusion, the inner cavity of the hollow valve body is provided with a guide groove engaged with the protrusion, the protrusion moves along the guide groove, and when the button is not operated, the protrusion is retained at an end wall of the guide groove by an elastic force of the elastic member, so that the negative pressure control valve is maintained in a closed state.
6. The negative pressure control valve of claim 1, wherein the second stopper is disposed at the second end of the spool, the first stopper is disposed between the first end of the spool and the second stopper, a second engagement opening is disposed between the first stopper and the second stopper, and a first engagement opening is disposed between the first end of the spool and the first stopper.
7. The negative pressure control valve according to claim 1, wherein the first stopper and the second stopper are both annular stoppers, an outer diameter of the second stopper is set to be larger than an outer diameter of the first stopper, the second stopper is provided with a second sealing inclined surface, an inner cavity of the hollow valve body is provided with a second mating inclined surface which mates with the second sealing inclined surface, and when the negative pressure control valve is in a closed state, the second sealing inclined surface contacts with the second mating inclined surface, so that the second end of the spool is sealed with the hollow valve body.
8. A negative pressure control valve in accordance with claim 1, wherein the negative pressure control valve comprises a valve seat disposed at the second end of the hollow valve body.
9. A negative pressure control valve according to claim 8, wherein the negative pressure control valve comprises a seat disposed between the valve seat and the second end of the hollow valve body to sealingly couple the valve seat and the second end of the hollow valve body.
10. An endoscope provided with the negative pressure control valve according to any one of claims 1 to 9, wherein the first port is connected to a suction channel of the endoscope, and the second port is connected to a suction pump.
CN202010298446.2A 2020-04-16 2020-04-16 Negative pressure control valve and corresponding endoscope Pending CN111365487A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010298446.2A CN111365487A (en) 2020-04-16 2020-04-16 Negative pressure control valve and corresponding endoscope

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010298446.2A CN111365487A (en) 2020-04-16 2020-04-16 Negative pressure control valve and corresponding endoscope

Publications (1)

Publication Number Publication Date
CN111365487A true CN111365487A (en) 2020-07-03

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Application Number Title Priority Date Filing Date
CN202010298446.2A Pending CN111365487A (en) 2020-04-16 2020-04-16 Negative pressure control valve and corresponding endoscope

Country Status (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112315412A (en) * 2020-11-04 2021-02-05 中国医学科学院北京协和医院 Endoscope negative pressure adjusting device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112315412A (en) * 2020-11-04 2021-02-05 中国医学科学院北京协和医院 Endoscope negative pressure adjusting device
CN112315412B (en) * 2020-11-04 2022-03-18 中国医学科学院北京协和医院 Endoscope negative pressure adjusting device

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