Suction valve assembly and endoscope

Abstract

The utility model relates to the technical field of endoscopes, and particularly discloses a suction valve assembly and an endoscope, at least comprising: a valve body provided with an axially extending valve core channel and a liquid inlet / outlet channel vertically communicated with the valve core channel, a first sealing conical surface and a second sealing conical surface arranged at the intersection position of the valve core channel and the liquid inlet / outlet channel; the valve element is provided with a conical sealing section, and the conical sealing section can be attached to and sealed with the first sealing conical surface and the second sealing conical surface; and an opening-closing assembly. When the suction valve assembly is in a conducting state, no other obstacles exist in the liquid inlet and outlet channel except for partial obstacles of the valve element, and the flow channel is free of corners, so that the fluid flowing efficiency is higher; the valve element does not need to be of an integrated solid structure and does not need to be hollowed out, so that the strength is higher; the valve element does not need to be tightly matched with the valve element channel in the pressing process, manufacturing and assembling difficulty is lowered, and abrasion is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of endoscopes, in particular to a suction valve component and an endoscope. Background Art

[0002] The suction valve is an important component of the endoscope. When medical personnel use the endoscope to observe the lesion, it controls the suction of fluid in the human body to prevent the fluid from interfering with the inspection and treatment process. One end of the suction valve is connected to the pipeline extending into the human body, and the other end is connected to the negative pressure pipeline. The suction valve is opened and closed to complete the opening and closing of the suction valve. For example, the "suction valve and endoscope" disclosed in the Chinese patent document, with the publication number CN117297505A, includes a valve body, a valve core, an elastic member and a valve stem. The valve core is movably arranged in the valve body, and the elastic member is connected to the valve body and the valve core, so that when the valve stem is pressed to switch from the closed position to the suction position, the valve core moves with the valve stem under the elastic force of the elastic member. A conducting hole is arranged on the body of the valve stem, and the negative pressure channel is arranged on the side of the valve body. The sample channel connected to the pipeline extending into the human body is arranged on the lower side of the valve body. When conducting, the fluid is guided to communicate through the conducting hole. The disadvantage is that due to the setting of the through hole and the inlet and outlet are not directly opposite, there are various obstacles and corners in the flow path of the fluid, which reduces the efficiency of fluid suction and easily causes impact damage to components such as the valve stem. Utility Model Content

[0003] The utility model aims to solve the problems of low suction efficiency and easy damage of the suction valve of the existing endoscope, and provides a suction valve component and an endoscope.

[0004] The technical solution provided by the utility model is as follows:

[0005] A suction valve assembly, comprising at least:

[0006] A valve body, wherein an axially extending valve core channel and an inlet and outlet liquid channel vertically connected to the valve core channel are provided in the valve body, and a first sealing cone surface and a second sealing cone surface are provided at the intersection of the valve core channel and the inlet and outlet liquid channel;

[0007] A valve core is located in the valve core channel and is axially movably connected to the valve core channel, the valve core is provided with a conical sealing section, the valve core at least includes a flow cut-off state in which the conical sealing section is sealed with the first sealing cone surface and the second sealing cone surface, and a conducting state in which the conical sealing section is released from the first sealing cone surface and the second sealing cone surface, and a receiving cavity for receiving the conical sealing section is provided at the bottom of the valve core channel;

[0008] The opening and closing assembly comprises a pressing part fixedly connected to the valve core and elastic parts at two ends respectively supporting the pressing part and the valve body.

[0009] When the suction valve assembly is closed, that is, in a flow-cutting state, the conical sealing section is in close contact with the first sealing conical surface and the second sealing conical surface to seal, thereby isolating the inlet and outlet liquid channels.

[0010] When the suction valve assembly is fully opened, it is in a conducting state. At this time, there is no other obstruction in the inlet and outlet liquid channels except for the partial obstruction of the valve core, and the flow channel has no corners, so that the fluid flow efficiency is higher. In addition, the valve core does not need to be an integrated solid structure and does not need to be hollowed out, so that the strength is higher and it is not easy to be damaged.

[0011] Preferably, the valve body has a leak-proof sealing surface extending into the valve core channel, the leak-proof sealing surface is located above the inlet and outlet liquid channels, and the valve core is provided with a leak-proof section, which is in close contact and seal with the leak-proof sealing surface in a conducting state.

[0012] When the valve core is pressed to the bottom, the leak-proof section and the leak-proof sealing surface are sealed together to prevent liquid from leaking out to the opening and closing components, thereby facilitating sealing.

[0013] A transition section is provided between the leak-proof section and the conical sealing section. One end of the transition section connected to the leak-proof section is enlarged to form an enlarged portion, and the enlarged portion is tightly matched with the valve core channel.

[0014] When the pressing part is pressed to open the suction valve assembly, the expanded part can form high pressure in the valve core channel, blocking the space for liquid to enter the pressing part, thereby preventing the liquid from entering the pressing part and leaking.

[0015] Preferably, the cross section of the transition section is a streamlined structure, so that the liquid flow resistance in the liquid inlet and outlet channels is smaller.

[0016] Preferably, the elastic member is a conical spring, the bottom of which is arranged outside the sealing section, so that a larger sealing section can be accommodated in the spring, reducing the volume of the pressing part, and gradually increasing the pressing resistance during the pressing process, providing feedback to the user on the pressing stroke.

[0017] Preferably, the pressing portion is provided with a stopper protruding toward the side of the valve core, and the valve body is provided with a sliding groove for accommodating axial sliding of the stopper.

[0018] Preferably, the valve body comprises an inner valve body and an outer valve body which are nested with each other, a sliding groove is provided on the side of the outer valve body, a clamping block is provided on the inner valve body at the bottom of the sliding groove, and a clamping block for clamping the clamping block is provided on the sliding groove. During installation, the inner valve body is inserted into the sliding groove for clamping.

[0019] An endoscope comprises the suction valve assembly.

[0020] Preferably, it further comprises a handle shell, wherein the handle shell is provided with a mounting hole for mounting the pressing portion.

[0021] Compared with the prior art, the utility model has the following beneficial effects:

[0022] When the suction valve assembly is fully opened, it is in a conducting state. At this time, there are no other obstructions in the inlet and outlet liquid channels except for the partial obstruction of the valve core, and the flow channel has no corners, so that the fluid flow efficiency is higher; the valve core does not need to be an integrated solid structure and does not need to be hollowed out, which makes it stronger and less prone to damage; the valve core does not need to fit tightly with the valve core channel during the pressing process, which reduces the difficulty of manufacturing and assembly and reduces wear. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the first embodiment of the utility model;

[0024] Figure 2 It is a side schematic diagram of the first embodiment of the utility model;

[0025] Figure 3 It is a cross-sectional schematic diagram of the cut-off state of the first embodiment of the utility model;

[0026] Figure 4 It is a cross-sectional schematic diagram of the conductive state of the first embodiment of the utility model;

[0027] Figure 5 It is a three-dimensional schematic diagram of the second embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram of the structure of the second embodiment of the utility model after the handle shell is removed.

[0029] Explanation of the accompanying drawings: valve body 1, first sealing cone surface 11, second sealing cone surface 12, inner valve body 13, blocking block 131, outer valve body 14, sliding groove 15, clamping block 151, valve core channel 2, accommodating chamber 21, leak-proof sealing surface 22, inlet and outlet liquid channel 3, valve core 4, conical sealing section 41, leak-proof section 42, transition section 43, enlarged portion 431, sealing section 23, enlarged portion 431, pressing portion 31, pressing portion 51, block 511, elastic member 52, mounting hole 6. DETAILED DESCRIPTION

[0030] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0031] Embodiment 1, a suction valve assembly, the axial direction of the valve core 4 is vertical, and the end of the valve core 4 with the conical sealing section 41 is the lower end or bottom end, such as Figure 1-Figure 4As shown, including at least:

[0032] A valve body 1, wherein an axially extending valve core channel 2 and an inlet and outlet liquid channel 3 vertically connected to the valve core channel 2 are provided in the valve body 1, wherein a first sealing cone surface 11 and a second sealing cone surface 12 are provided at the intersection of the valve core channel 2 and the inlet and outlet liquid channel 3, wherein the first sealing surface 11 is located at the upper portion of the inlet and outlet liquid channel 3, and the second sealing cone surface 12 is located at the lower portion of the inlet and outlet liquid channel 3, wherein a leakproof sealing surface 22 is extended into the valve core channel 2 by the valve body 1, and the leakproof sealing surface 22 is located above the inlet and outlet liquid channel 3 to form a step shape, i.e., the valve core channel 2 is partially contracted between the inlet and outlet liquid channel 3 and the leakproof sealing surface 22;

[0033] The valve core 4 is located in the valve core channel 2 and is axially movably connected to the valve core channel 2. The valve core 4 is provided with a conical sealing section 41, and the conical sealing section 41 is a platform-shaped body with a small upper part and a large lower part. The valve core at least includes a cut-off state in which the conical sealing section 41 and the first sealing cone surface 11 and the second sealing cone surface 12 are sealed together, and a conducting state in which the conical sealing section 41 and the first sealing cone surface 11 and the second sealing cone surface 12 are released from the seal. The bottom of the valve core channel 2 is provided with an accommodating cavity 21 for accommodating the conical sealing section 41, and the valve core 4 is provided with a leak-proof section 4 2. The leak-proof section 42 is in the shape of a platform with a small upper part and a large lower part. The lower surface of the leak-proof section 42 is in close contact with the leak-proof sealing surface 22 in the conducting state. A transition section 43 is provided between the leak-proof section 42 and the conical sealing section 41. One end of the transition section 43 connected to the leak-proof section 42 is enlarged to form an enlarged portion 431, and the enlarged portion 431 is closely matched with the valve core channel 2. The cross section of the transition section 43 except the enlarged portion 431 is a cylindrical or streamlined structure that is conducive to circulation. The entire valve core 4 does not need to be sealed with the valve core channel 2 during movement except the enlarged portion 431.

[0034] The opening and closing assembly includes a pressing portion 51 fixedly connected to the valve core 1 and elastic members 52 at both ends respectively supporting the pressing portion 51 and the valve body, and the elastic member 52 is a conical spring. The bottom of the conical spring is arranged outside the sealing section, so that a larger sealing section can be accommodated in the spring, reducing the volume of the pressing portion, and also gradually increasing the pressing resistance during the pressing process, providing feedback to the user on the pressing stroke.

[0035] When the suction valve assembly is closed, the elastic member 52 lifts the valve core 4 , that is, it is in a flow-cutting state, and the conical sealing section 41 simultaneously seals against the first sealing cone surface 11 and the second sealing cone surface 12 , isolating the inlet and outlet liquid channels 3 .

[0036] When the pressing portion 51 is pressed to open the suction valve assembly, the expanded portion 431 generates high pressure in the valve core channel 2, blocking the space for liquid to enter the pressing portion 51, thereby preventing the liquid from entering the pressing portion 51 and leaking.

[0037] When the valve core 4 is pressed to the bottom and the suction valve assembly is fully opened, it is in a conducting state, and the leak-proof section 42 is sealed with the leak-proof sealing surface 22 to prevent the liquid from leaking to the opening and closing assembly, so that the transition section 43 of the valve core 4 is located between the inlet and outlet liquid channels 3 except for the bulge 431, and there are no other obstacles in the inlet and outlet liquid channels 3 except for the partial obstruction of the valve core 1, and the flow channel has no corners, so that the fluid flow efficiency is higher. In addition, the valve core 4 does not need to be an integrated solid structure and does not need to be hollowed out, so that the strength is higher and it is not easy to be damaged.

[0038] In addition, the pressing portion 21 is provided with a stopper 511 protruding toward the side of the valve core, and the valve body is provided with a sliding groove 15 for accommodating the axial sliding of the stopper 511. The valve body 1 includes an inner valve body 13 and an outer valve body 14 nested with each other, the outer valve body 14 is provided with a sliding groove 15 on the side, the inner valve body 13 is provided with a clamping block 131 located at the bottom of the sliding groove 15, and the sliding groove 15 is provided with a clamping block 151 for clamping the clamping block 131. During installation, the inner valve body 13 is inserted into the sliding groove 15 for clamping. The sliding groove 15 is used to fix the inner valve body 13 and the sliding pressing portion 21 at the same time.

[0039] Embodiment 2, as Figure 5 and Figure 6 As shown, an endoscope includes the suction valve assembly in the first embodiment and also includes a handle housing 4, the handle housing 4 is provided with a mounting hole 6 for mounting a pressing portion 31, and both ends of the inlet and outlet liquid channel 3 are connected to a liquid inlet pipe and a liquid outlet pipe respectively.

[0040] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, the technical solution of the present invention can be subjected to a variety of simple modifications, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. A suction valve assembly, characterized in that: At least: A valve body (1), wherein an axially extending valve core channel (2) and an inlet and outlet liquid channel (3) vertically connected to the valve core channel (2) are provided in the valve body (1), and a first sealing cone surface (11) and a second sealing cone surface (12) are provided at a position where the valve core channel (2) and the inlet and outlet liquid channel (3) intersect; A valve core (4) is located in the valve core channel (2) and is axially movably connected to the valve core channel (2), the valve core (4) being provided with a conical sealing section (41), the valve core at least comprising a flow-cutting state in which the conical sealing section (41) is in close contact with the first sealing conical surface (11) and the second sealing conical surface (12) and a conducting state in which the conical sealing section (41) is released from the first sealing conical surface (11) and the second sealing conical surface (12), and a receiving cavity (21) for receiving the conical sealing section (41); The opening and closing assembly comprises a pressing portion (51) fixedly connected to the valve core (4) and an elastic member (52) at two ends of which respectively support the pressing portion (51) and the valve body (1).

2. The suction valve assembly according to claim 1, characterized in that: The valve body (1) is provided with a leakproof sealing surface (22) extending into the valve core channel (2); the leakproof sealing surface (22) is located above the inlet and outlet liquid channels (3); the valve core (4) is provided with a leakproof section (42); the leakproof section (42) is in close contact with the leakproof sealing surface (22) in a conducting state and is sealed.

3. The suction valve assembly according to claim 2, characterized in that: A transition section (43) is provided between the leak-proof section (42) and the conical sealing section (41); one end of the transition section (43) connected to the leak-proof section (42) is enlarged to form an enlarged portion (431); and the enlarged portion (431) is tightly matched with the valve core channel (2).

4. The suction valve assembly according to claim 2, characterized in that: A transition section (43) is provided between the leak-proof section (42) and the conical sealing section (41), and the cross section of the transition section (43) is a streamlined structure.

5. The suction valve assembly according to any one of claims 1 to 4, characterized in that: The elastic member (52) is a conical spring.

6. The suction valve assembly according to any one of claims 1 to 4, characterized in that: The pressing portion (51) is provided with a stopper (511) protruding toward the side, and the valve body (1) is provided with a sliding groove (15) for accommodating axial sliding of the stopper (511).

7. The suction valve assembly according to any one of claims 1 to 4, characterized in that: The valve body (1) comprises an inner valve body (13) and an outer valve body (14) which are nested with each other, a sliding groove (15) being provided on the side of the outer valve body (14), a clamping block (131) being provided at the bottom of the sliding groove (15), and a clamping block (151) being provided on the sliding groove (15) for clamping the clamping block (131).

8. An endoscope, characterized in that: The invention comprises the suction valve assembly as described in any one of claims 1 to 7.

9. The endoscope according to claim 8, characterized in that It also comprises a handle shell, wherein the handle shell is provided with a mounting hole (6) for mounting the pressing portion (51).

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