Leakage detection valve

Abstract

The leak hunting valve comprises a valve body, a valve rod, a sealing ring, a locking piece and an elastic piece, the valve body is provided with an air inlet, an air channel and an air outlet which are sequentially communicated, the diameters of the air inlet, the air channel and the air outlet are sequentially increased, and the inner end of the valve body is used for being connected with an endoscope handle; an annular convex shoulder is arranged at one end of the valve rod; one end of the valve rod is sleeved with the sealing ring, and the sealing ring is located between the convex shoulder and the side wall of the air inlet; the locking piece is detachably arranged in the air outlet; the two ends of the elastic piece abut against the locking piece and the protruding shoulder respectively, and the elastic piece forces the protruding shoulder to enable the sealing ring to abut against the side wall of the air inlet, so that the sealing ring is sealed between the air inlet and the air channel. The valve rod, the sealing ring, the locking piece and the elastic piece are all assembled in the valve body, the leak hunting valve is an independent whole, the inner end of the valve body can be conveniently connected with a shell of an endoscope handle, the production efficiency of an endoscope is improved, and the leak hunting valve can be independently detached and replaced conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a leak detection valve. Background Art

[0002] Endoscope is a very important medical examination and treatment tool, which provides doctors with more intuitive and accurate diagnosis and treatment methods. During the production and subsequent use of endoscopes, it is necessary to perform leak detection on the endoscope to maintain the sealing of the endoscope, which is extremely important for the safety of the endoscope. To detect the leak of an endoscope, the endoscope is usually placed in water, and then gas is flushed into the endoscope through the leak detection valve on the endoscope handle. Whether the endoscope is leaking is determined by observing whether there are bubbles in the water. At present, the structure of the leak detection valve is relatively simple, and the endoscope handle and the leak detection valve are integrated together, resulting in more and more complicated assembly steps for the endoscope, increasing the workload and difficulty of workers, affecting the production efficiency of the endoscope, and inconvenient replacement of the leak detection valve. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a leak detection valve which is an independent whole and can be pre-assembled and then connected to the endoscope handle to improve the production efficiency of the endoscope.

[0004] A leak detection valve according to an embodiment of the utility model comprises a valve body, a valve stem, a sealing ring, a locking member and an elastic member, the valve body is provided with an air channel, an air inlet is provided on the end face of the outer end of the valve body, and an air outlet is provided on the end face of the inner end of the valve body, the air inlet, the air channel and the air outlet are connected in sequence, the diameters of the air inlet, the air channel and the air outlet increase in sequence, and the inner end of the valve body is used to connect with an endoscope handle; the valve stem is inserted into the air channel, and an annular boss is provided on one end of the valve stem; the sealing ring is sleeved on one end of the valve stem, and the sealing ring is between the boss and the side wall of the air inlet; the locking member is detachably provided in the air outlet; the elastic member is provided in the air channel, one end of the elastic member abuts against the locking member, and the other end of the elastic member abuts against the boss, and the elastic member forces the boss to abut the sealing ring against the side wall of the air inlet, so that the sealing ring forms a seal between the air inlet and the air channel.

[0005] At least the following beneficial effects are achieved:

[0006] The valve stem, sealing ring, locking member and elastic member are all assembled in the valve body. After the leak detection valve is assembled, the leak detection valve becomes an independent entity, and then is connected to the endoscope handle through the inner end of the valve body. After the leak detection valve is pre-assembled, the inner end of the valve body can be easily connected to the shell of the endoscope handle, thereby improving the production efficiency of the endoscope. Compared with the assembly process of integrating the leak detection valve and the endoscope handle, the process of the leak detection valve as an independent entity is easier to operate and more efficient. In addition, the leak detection valve becomes an independent entity. When the leak detection valve is damaged, the leak detection valve can be disassembled and replaced separately, which is convenient for the maintenance of the endoscope.

[0007] According to some embodiments of the present invention, a tip of one end of the valve stem can be slidably disposed in the air inlet.

[0008] According to some embodiments of the present utility model, the elastic member is a spring, and the spring is sleeved on the other end of the valve stem.

[0009] According to some embodiments of the present invention, the locking member is a conversion nut.

[0010] According to some embodiments of the present invention, the locking member is tubular, and the outer wall of the locking member is connected to the inner wall of the air outlet by means of a threaded connection.

[0011] According to some embodiments of the present invention, the tubular cavity of the locking member is in the shape of a regular polygon, so that the locking member can cooperate with an inner polygonal wrench.

[0012] According to some embodiments of the present utility model, an external thread for cooperating with an external nut is provided on the inner end of the valve body.

[0013] According to some embodiments of the present invention, a connecting column for connecting to an air pipe is provided on the outer end of the valve body.

[0014] According to some embodiments of the present invention, the sealing ring is an O-ring.

[0015] According to some embodiments of the present invention, the sealing ring is made of rubber material.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of the structure of a leak detection valve according to an embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of the explosion structure of a leak detection valve according to an embodiment of the utility model;

[0020] Figure 3 This is a schematic cross-sectional view of a leak detection valve according to an embodiment of the utility model;

[0021] Figure Number:

[0022] Valve body 100; air passage 110; air inlet 120; air outlet 130; connecting column 140;

[0023] Valve stem 200; shoulder 210;

[0024] Sealing ring 300;

[0025] Locking member 400;

[0026] Elastic member 500. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the 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.

[0028] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0031] Reference Figures 1 to 3 The utility model discloses a leak detection valve, including a valve body 100, a valve stem 200, a sealing ring 300, a locking member 400 and an elastic member 500.

[0032] The valve body 100 is provided with an air passage 110, an air inlet 120 is provided on the end surface of the outer end of the valve body 100, and an air outlet 130 is provided on the end surface of the inner end of the valve body 100. The air inlet 120, the air passage 110 and the air outlet 130 are connected in sequence, and the diameters of the air inlet 120, the air passage 110 and the air outlet 130 increase in sequence. The inner end of the valve body 100 is used to connect with the endoscope handle;

[0033] The valve stem 200 is inserted into the air passage 110, and an annular boss 210 is provided on one end of the valve stem 200;

[0034] The sealing ring 300 is sleeved on one end of the valve stem 200 , and the sealing ring 300 is located between the boss 210 and the side wall of the air inlet 120 ;

[0035] The locking member 400 is detachably disposed in the air outlet 130;

[0036] The elastic member 500 is disposed in the air duct 110 , with one end of the elastic member 500 abutting against the locking member 400 , and the other end of the elastic member 500 abutting against the boss 210 . The elastic member 500 forces the boss 210 to press the sealing ring 300 against the side wall of the air inlet 120 , so that the sealing ring 300 forms a seal between the air inlet 120 and the air duct 110 .

[0037] The valve stem 200, the sealing ring 300, the locking member 400 and the elastic member 500 are all assembled in the valve body 100. After the leak detection valve is assembled, the leak detection valve becomes an independent whole, and then is connected to the endoscope handle through the inner end of the valve body 100. The endoscope completes the installation of the leak detection valve. When the leak detection valve is opened, the leak detection valve serves to connect the inside of the endoscope with the outside of the endoscope. When the leak detection valve is closed, the inside of the endoscope and the outside of the endoscope are not connected. From the outside, only the valve body 100 can be seen, avoiding screws and other parts from affecting the beauty of the leak detection valve.

[0038] After the leak detection valve is preassembled, the inner end of the valve body 100 can be conveniently connected to the housing of the endoscope handle, thereby improving the production efficiency of the endoscope. Compared with the assembly process of integrating the leak detection valve and the endoscope handle, the process of the leak detection valve as an independent whole is easier to operate and more efficient. Moreover, the leak detection valve becomes an independent whole. When the leak detection valve is damaged, the leak detection valve can be disassembled and replaced separately, which is convenient for the maintenance of the endoscope.

[0039] It is understood that the outer diameter of the sealing ring 300 is larger than the inner diameter of the air inlet 120, and the outer diameter of the sealing ring 300 is less than or equal to the outer diameter of the convex shoulder 210, so that the convex shoulder 210 can stably press the sealing ring 300 against the inner surface of the side wall of the air inlet 120, thereby forming a good seal between the sealing ring 300 and the side wall of the air inlet 120 and between the sealing ring 300 and the convex shoulder 210, so as to prevent the gas outside the leak detection valve from entering the airway 110 from between the sealing ring 300 and the side wall of the air inlet 120 and between the sealing ring 300 and the convex shoulder 210, or to prevent the gas in the endoscope from overflowing from the air inlet 120 and the leak detection valve from between the sealing ring 300 and the convex shoulder 210 and between the sealing ring 300 and the side wall of the air inlet 120. The inner diameter of the sealing ring 300 matches one end of the valve stem 200, so that the sealing ring 300 can be stably sleeved on one end of the valve stem 200.

[0040] The air inlet 120, the air passage 110 and the air outlet 130 are coaxially arranged. The outer diameters of the boss 210 and the sealing ring 300 are less than or equal to the diameter of the air passage 110, so that the valve stem 200 and the sealing ring 300 can smoothly enter the air passage 110 from the air outlet 130 and move along the length direction of the air passage 110 in the air passage 110.

[0041] An assembly process of the leak detection valve includes: sleeve the sealing ring 300 on one end of the valve stem 200, the sealing ring 300 abuts against the boss 210, and then the valve stem 200 and the sealing ring 300 are inserted from the air outlet 130 into the air passage 110, and then the elastic member 500 is inserted from the air outlet 130 into the air passage 110, and finally the locking member 400 is inserted into the air outlet 130 to complete the assembly of the locking member 400. At this time, the locking member 400 abuts against one end of the elastic member 500, and the other end of the elastic member 500 abuts against the boss 210. The elastic member 500 is compressed, thereby forcing the boss 210 to press the sealing ring 300 against the side wall of the air inlet 120. The sealing ring 300 forms a seal between the air inlet 120 and the air passage 110, that is, the air passage 110 is closed, and the leak detection valve is in a normally closed state.

[0042] When the endoscope is detecting leaks, the air pipe of the inflation device is connected to the outer end of the valve body 100, and the gas output by the inflation device pushes the valve stem 200 toward the inner end of the valve body 100, and the elastic member 500 is further compressed. The boss 210 of the valve body 100 loosens the sealing ring 300, and the air inlet 120 and the airway 110 are no longer sealed. The gas output by the inflation device will pass through the air inlet 120, the airway 110 and the air outlet 130 in sequence and then enter the interior of the endoscope, increasing the internal pressure of the endoscope. When the sealing of the endoscope is destroyed, the gas inside the endoscope will leak out of the endoscope, which means that the endoscope is in danger of leakage and its safety is destroyed.

[0043] In some embodiments, the inner end of the valve body 100 is provided with an external thread for matching with an external nut. The housing of the endoscope handle is provided with a mounting hole. When installing the leak detection valve, the inner end of the valve body 100 passes through the mounting hole and is connected with the external nut. The valve body 100 can be connected to the housing of the endoscope handle by tightening the external nut.

[0044] Furthermore, the diameter of the inner end of the valve body 100 is smaller than the diameter of the outer end of the valve body 100, and a shoulder is formed between the inner end of the valve body 100 and the outer end of the valve body 100. When the outer nut is tightened, the outer nut abuts against the inner wall of the endoscope handle, and the shoulder abuts against the outer wall of the endoscope handle. Of course, in order to prevent air leakage from the mounting hole, a sealing gasket or other waterproof sealing means is used between the mounting hole and the inner end of the valve body 100.

[0045] Reference Figure 2 and Figure 3 In some embodiments, a connecting column 140 for connecting to an air pipe is provided on the outer end of the valve body 100. When leak detection is performed, the air pipe of the inflatable device is connected to the outer end of the valve body 100, so that the inflatable device can deliver gas to the air inlet 120 on the valve body 100. In order to facilitate the stable connection between the valve body 100 and the air pipe, the valve body 100 can be positioned and hooked with the air pipe through the connecting column 140 to prevent the air pipe from accidentally falling off the valve body 100.

[0046] Reference Figure 3 In some of the embodiments, the end of the valve stem 200 can be slidably inserted into the air inlet 120, and the end of the valve stem 200 is matched with the air inlet 120. When the valve stem 200 moves, the air inlet 120 guides the end of the valve stem 200. The end of the valve stem 200 is in the air inlet 120, which can prevent foreign matter from entering the air inlet 120.

[0047] In some of the embodiments, the elastic member 500 is a spring, which is sleeved on the other end of the valve stem 200. The valve stem 200 acts as a limit spring. The spring can be assembled by first sleeved on the other end of the valve stem 200 and then inserting the valve stem 200 and the spring into the airway 110 together, or first inserting the valve stem 200 into the airway 110 and then inserting the spring into the airway 110 and sleeved on the valve stem 200.

[0048] In some of the embodiments, the locking member 400 is a conversion nut, which is a common component on the market, easy to obtain and simple to use, and can press the elastic member 500 into the airway 110 .

[0049] In this embodiment, the locking member 400 is an M5-to-M3 internal and external thread nut.

[0050] Reference Figure 3In some embodiments, the locking member 400 is tubular and has a lumen. The air inlet 120, the airway 110 and the lumen of the locking member 400 are connected in sequence to ensure that the gas can pass through the valve body 100 and the elastic member 500 cannot pass through the lumen of the locking member 400.

[0051] The outer wall of the locking member 400 is connected to the inner wall of the air outlet 130 by a threaded connection. The locking member 400 can be locked on the inner wall of the air outlet 130 by rotating the locking member 400, or the locking member 400 can be removed from the inner wall of the air outlet 130.

[0052] In some of the embodiments, the tubular cavity shape of the locking member 400 is a regular polygon, so that the locking member 400 can cooperate with an inner polygonal wrench, and the locking member 400 can be easily rotated by the inner polygonal wrench.

[0053] Reference Figure 2 In some of the embodiments, the sealing ring 300 is an O-ring, which is a common component on the market, easy to obtain and simple to use.

[0054] In some of the embodiments, the sealing ring 300 is made of rubber material, so that the sealing ring 300 has a certain elasticity to ensure the sealing effect.

[0055] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] Of course, the present invention is not limited to the above-mentioned embodiments, and technicians familiar with the field may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A leak detection valve, characterized in that: include: A valve body (100) is provided with an air passage (110); an air inlet (120) is provided on an end surface of an outer end of the valve body (100); an air outlet (130) is provided on an end surface of an inner end of the valve body (100); the air inlet (120), the air passage (110) and the air outlet (130) are connected in sequence; the diameters of the air inlet (120), the air passage (110) and the air outlet (130) increase in sequence; and the inner end of the valve body (100) is used for connecting to an endoscope handle; A valve stem (200) is inserted into the air passage (110), and an annular boss (210) is provided on one end of the valve stem (200); A sealing ring (300) is sleeved on one end of the valve stem (200), and the sealing ring (300) is located between the boss (210) and the side wall of the air inlet (120); A locking member (400) is detachably disposed in the air outlet (130); An elastic member (500) is disposed in the air duct (110), one end of the elastic member (500) abuts against the locking member (400), and the other end of the elastic member (500) abuts against the boss (210). The elastic member (500) forces the boss (210) to press the sealing ring (300) against the side wall of the air inlet (120), so that the sealing ring (300) forms a seal between the air inlet (120) and the air duct (110).

2. A leak detection valve according to claim 1, characterized in that: The end of one end of the valve stem (200) can be slidably inserted into the air inlet (120).

3. A leak detection valve according to claim 1, characterized in that: The elastic member (500) is a spring, and the spring is sleeved on the other end of the valve stem (200).

4. A leak detection valve according to claim 1, characterized in that: The locking member (400) is a conversion nut.

5. A leak detection valve according to claim 1, characterized in that: The locking member (400) is tubular, and the outer wall of the locking member (400) is connected to the inner wall of the air outlet (130) by means of a threaded connection.

6. A leak detection valve according to claim 5, characterized in that: The tubular cavity shape of the locking member (400) is a regular polygon, so that the locking member (400) can cooperate with an inner polygonal wrench.

7. A leak detection valve according to claim 1, characterized in that: The inner end of the valve body (100) is provided with an external thread for cooperating with an external nut.

8. A leak detection valve according to claim 1, characterized in that: A connecting column (140) for connecting to an air pipe is provided on the outer end of the valve body (100).

9. A leak detection valve according to claim 1, characterized in that: The sealing ring (300) is an O-ring.

10. A leak detection valve according to claim 1 or 9, characterized in that: The sealing ring (300) is made of rubber material.

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