Control valve structure for endoscope aspirator

Abstract

The control valve structure comprises a main body shell, a piston and an elastic piece, the piston and the elastic piece are located in the main body shell, a liquid inlet and a liquid outlet are formed in the two opposite sides of the main body shell, and a through hole is formed in the piston. And when the piston is pushed towards the head end of the main body shell to enable the elastic piece to be completely pressed, the through hole can be communicated with the liquid inlet and the liquid outlet. By means of the arrangement, a smooth linear channel can be formed, and it is guaranteed that liquid or gas smoothly passes through the channel. Due to the fact that the formed passing channel is in a linear type, the stroke of the piston is greatly shortened when the flow channels on the two sides are opened and closed, a user can operate more easily, the channel can be opened only by pushing the piston with force, the first pressure relief hole and the second pressure relief hole can guarantee smoothness when the piston is pushed, and control through other skills is not needed. As the stroke of the piston is short, the operation efficiency can be effectively ensured when the piston is rapidly and continuously operated.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical equipment technical field, concretely relates to a control valve structure for endoscope aspirator. BACKGROUND

[0002] In the modern medical endoscope industry, physiological saline injection and contaminated water suction often need to rely on instruments in the minimally invasive surgery process, and endoscope aspirator medical equipment is usually used to suck and remove the liquid, gas and solid residues generated in the endoscope examination process.

[0003] The existing endoscope aspirator operation mode, when not pressing the suction button, the aspirator will suck air at the gap above the button, and when pressing the suction button, the suction channel and the channel port connected with the head end start to suck. This operation utilizes the negative pressure principle, and by controlling the pressing of the suction button, the effective suction and removal of the liquid or solid in the human cavity are realized. However, when the two-way flow channel is opened and closed, the stroke of the negative pressure piston is long, so the operation is relatively complex, more power and skills are needed to control, which may bring additional operation difficulty to the medical staff. In addition, the long-stroke piston may reduce the efficiency when operated continuously, especially in emergency situations, long-time operation may delay the treatment process and cause adverse effects on the patient. The aspirator with long piston stroke also needs more complex mechanical structure and more material investment, which will indirectly increase the manufacturing cost of medical equipment and affect the operating cost of medical institutions. SUMMARY

[0004] Therefore, the technical problem to be solved by the utility model is the long stroke of the negative pressure piston in the existing endoscope aspirator, the complex operation and the low working efficiency, so as to provide a control valve structure for endoscope aspirator.

[0005] To solve the above technical problems, the technical scheme of the utility model is as follows:

[0006] A control valve structure for endoscope aspirator, comprising:

[0007] A main body shell, opposite sides of the side wall of which are respectively provided with a liquid inlet and a liquid outlet, the head end of the main body shell is closed, and a first pressure relief hole is formed in the side wall of the main body shell;

[0008] A piston, which is movably connected with the main body shell, one end of the piston is located inside the main body shell, a through hole is formed in the side wall of the piston, the through hole is respectively and correspondingly provided with the liquid inlet and the liquid outlet at both ends, and a second pressure relief hole is also formed in the side wall of the piston;

[0009] An elastic member is elastically connected between the inside of the head end of the main shell and the piston, and the through hole can be in communication with the liquid inlet and the liquid outlet when the piston is pushed to the head end of the main shell and the elastic member is fully compressed.

[0010] Further, the piston is provided with a first sealing member and a second sealing member, which are respectively arranged near the upper and lower ends of the piston and on opposite sides of the through hole.

[0011] Further, the first sealing member and the second sealing member are both O-shaped sealing rings, and the first sealing member is arranged obliquely on the piston.

[0012] Further, the head end of the main shell is through, and the head end of the main shell is provided with a sealing cover which is sealed thereon, and the elastic member is connected between the sealing cover and the piston.

[0013] Further, an L-shaped limiting hole is formed in the side wall of the head end of the main shell, and a limiting column is arranged on the outer wall of the sealing cover and matched with the L-shaped limiting hole, and the sealing cover is detachably arranged on the head end of the main shell.

[0014] Further, the vertical end of the L-shaped limiting hole is arranged along the axis outside the main shell, and the other end of the L-shaped limiting hole is arranged obliquely, and the included angle between the vertical end of the L-shaped limiting hole and the other end of the L-shaped limiting hole is less than 90 degrees; when the sealing cover is completely covered on the main shell, the distance between the sealing cover and the end of the piston near the front end of the main shell is less than the length of the elastic member.

[0015] Further, the opposite sides of the main shell are both provided with the L-shaped limiting hole, and the opposite sides of the outer wall of the sealing cover are both provided with the limiting column, and the two L-shaped limiting holes and the two limiting columns are one-to-one correspondingly arranged.

[0016] Further, a first mounting hole is formed in the end face of the piston near the head end of the main shell, a second mounting hole corresponding to the first mounting hole is formed in the end of the sealing cover near the main shell, and the two ends of the elastic member are respectively mounted in the first mounting hole and the second mounting hole.

[0017] Further, the inner diameter of the main shell is 8-10 mm, the inner diameter of the piston is 7.9-9.9 mm, the inner diameters of the liquid inlet and the liquid outlet are both 3-5 mm, and the inner diameter of the through hole is the same as that of the liquid inlet and the liquid outlet.

[0018] Further, the elastic member is a compression spring.

[0019] The utility model technical scheme has the following advantages:

[0020] 1. The utility model provides a control valve structure for endoscope aspirator, through push the piston to the main part shell front end and advance to the state of being unable to advance, at this moment can make the through hole on the piston and the liquid inlet and the liquid outlet on the main part shell intercommunication, form a unobstructed straight line channel, guarantee liquid or gas passes smoothly, at this moment the elastic piece is the state of being completely compressed, release the force of exerting to the piston, the elastic piece rebounds under the elastic potential energy, simultaneously push the piston and move to the direction of being away from the main part shell front end, at this moment the through hole on the piston and the channel of the liquid inlet and the liquid outlet on the main part shell intercommunication are cut off, further can isolate liquid or gas. Because the through channel formed is straight line type, makes the piston stroke when opening and closing two sides flow channel greatly shorten, therefore the user is more simple in operation, only need to push the piston to open the channel, the main part shell and the piston are set up first pressure relief hole and second pressure relief hole respectively, can guarantee the smoothness when pushing the piston, need not other skills to control, because the piston stroke is short, the piston can effectively guarantee the operation efficiency when operating fast and continuously, simultaneously the short stroke piston of the application simple structure, production material input little, can effectively medical equipment manufacturing cost, further reduce the operation cost of medical institution.

[0021] 2. The utility model provides a control valve structure for endoscope aspirator, is provided with first sealing piece and second sealing piece on the piston, first sealing piece and second sealing piece are close to the upper and lower both ends of the piston respectively set up, and are set up respectively on the opposite sides of the through hole. Such setting, compared with single side sealing, the piston of liquid is easy to lead, the application adopts the sealing on the both sides of the piston, can guarantee the sealing of the upper and lower both sides of the through hole in the state of channel opening, effectively avoid liquid leakage.

[0022] 3. The utility model provides a control valve structure for endoscope aspirator, first sealing piece and second sealing piece are all O type sealing rings, and first sealing piece is arranged obliquely on the piston. Such setting, through the oblique installation of first sealing piece, can improve its performance and durability in high speed and high sealing pressure environment, effectively improve the service life of first sealing piece.

[0023] 4. The utility model provides a control valve structure for endoscope aspirator, the head end lateral wall on the main part shell is provided with L type limit hole, the outer wall on the sealing cover is provided with the limit post that is suitable for L type limit hole, and the sealing cover is detachably covered in the head end of main part shell. Such setting makes the main part shell and sealing cover detachable connection, can be more convenient to install and disassemble other parts in the main part shell, is convenient to check whether the spare part is intact at any time, simultaneously L type limit hole can avoid the sealing cover that dismounts and installs to slip off directly from the main part shell, guarantees the connection stability between the main part shell and sealing cover.

[0024] 5.The control valve structure for the endoscope suction device, the vertical end of the L-shaped limiting hole is arranged on the outer side of the main body shell in the axial direction, the other end of the L-shaped limiting hole is arranged obliquely, and the included angle between the vertical end of the L-shaped limiting hole and the other end of the L-shaped limiting hole is less than 90 degrees; when the sealing cover is completely covered on the main body shell, the distance between the sealing cover and the end of the piston close to the front end of the main body shell is less than the length of the elastic element. In this way, since the distance between the sealing cover and the end of the piston close to the front end of the main body shell is less than the length of the elastic element, that is, the elastic element is in a compressed state at this time, the elastic element tightly abuts against the sealing cover under the elastic potential of the elastic element, and since the other end of the L-shaped limiting hole is arranged obliquely, the L-shaped sealing cover can be effectively prevented from being accidentally rotated and separated from the main body shell under the frictional action of the external force, and the connection stability between the main body shell and the sealing cover is effectively ensured.

[0025] 6.The control valve structure for the endoscope suction device, opposite sides of the main body shell are provided with L-shaped limiting holes, opposite sides of the outer wall of the sealing cover are provided with limiting columns, and the two L-shaped limiting holes and the two limiting columns are one-to-one correspondingly arranged. In this way, the connection stability between the main body shell and the sealing cover can be further enhanced, and the side of the sealing cover can be prevented from being lifted and loosened.

[0026] 7.The control valve structure for the endoscope suction device, a first mounting hole is arranged on the end face of the piston close to the head end of the main body shell, a second mounting hole corresponding to the first mounting hole is arranged on the end of the sealing cover close to the main body shell, and the two ends of the elastic element are respectively mounted in the first mounting hole and the second mounting hole. In this way, the elastic element can be limited and guided through the first mounting hole and the second mounting hole, and the elastic element can be prevented from being twisted when being compressed. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can also be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0028] Figure 1 The structural schematic diagram of the control valve structure for the endoscope suction device provided by the utility model embodiment is shown in the figure.

[0029] Figure 2 The exploded view of the control valve structure for the endoscope suction device provided by the utility model embodiment is shown in the figure.

[0030] Figure 3Fig. 1 is a schematic view of an axial cross section of the control valve structure in the embodiment of the present application in a state where the spring is not compressed;

[0031] Figure 4 Fig. 2 is a schematic view of an axial cross section of the control valve structure in the embodiment of the present application in a state where the spring is compressed.

[0032] The reference numerals are as follows: 1, main body shell; 2, liquid inlet; 3, liquid outlet; 4, first pressure relief hole; 5, piston; 6, through hole; 7, second pressure relief hole; 8, first sealing member; 9, second sealing member; 10, elastic member; 11, sealing cover; 12, L-shaped limiting hole; 13, limiting column; 14, first mounting hole. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0034] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0037] For example, Figures 1-4The utility model provides an control valve structure for endoscope aspirator, including main body shell 1, piston 5 and elastic element 10 installed in main body shell 1, specifically, the opposite sides of main body shell 1 side wall are provided with liquid inlet 2 and liquid outlet 3 respectively, and the head end of main body shell 1 is closed, and the first pressure relief hole 4 is formed in the side wall of main body shell 1, piston 5 is movably connected with main body shell 1, one end of piston 5 is located in the interior of main body shell 1, the through hole 6 is formed in the side wall of piston 5, the through hole 6 is correspondingly arranged with liquid inlet 2 and liquid outlet 3 respectively, and the second pressure relief hole 7 is formed in the side wall of piston 5, and elastic element 10 is elastically connected between the interior of the head end of main body shell 1 and piston 5, when piston 5 is pushed to the head end of main body shell 1 and cannot be pushed further, the through hole 6 on piston 5 is communicated with liquid inlet 2 and liquid outlet 3, forming a straight channel to ensure the smooth flow of liquid or gas, and elastic element 10 is in a completely compressed state.

[0038] The control valve structure for endoscope aspirator, by pushing piston 5 to the head end of main body shell 1 and cannot be pushed further, the through hole 6 on piston 5 is communicated with liquid inlet 2 and liquid outlet 3, forming a straight channel to ensure the smooth flow of liquid or gas, and elastic element 10 is in a completely compressed state, releasing the force applied to piston 5, elastic element 10 rebounds under the elastic potential energy and pushes piston 5 away from the head end of main body shell 1, the channel between the through hole 6 on piston 5 and liquid inlet 2 and liquid outlet 3 on main body shell 1 is disconnected, and the liquid or gas is isolated, the straight channel ensures that the stroke of piston 5 is greatly shortened when opening and closing the flow channel, so that the user can operate more simply, just push piston 5 to open the channel, the first pressure relief hole 4 and the second pressure relief hole 7 are formed in main body shell 1 and piston 5 respectively, which can ensure the smoothness of pushing piston 5, and there is no need for other skills to control, the short stroke of piston 5 can effectively ensure the operation efficiency when piston 5 is operated continuously, and the short stroke piston 5 of the utility model is simple in structure and low in production material investment, which can effectively reduce the manufacturing cost of medical equipment and the operating cost of medical institutions.

[0039] In the embodiment, the head end of the main body shell 1 is provided with a through hole, and the head end of the main body shell 1 is provided with a sealing cover 11 which is covered on the head end of the main body shell 1, and the elastic member 10 is connected between the sealing cover 11 and the piston 5. Specifically, the L-shaped limiting hole 12 is formed on the sidewall of the head end of the main body shell 1, the limiting column 13 which is matched with the L-shaped limiting hole 12 is arranged on the outer wall of the sealing cover 11, and the sealing cover 11 is detachably arranged on the head end of the main body shell 1. In this way, the main body shell 1 and the sealing cover 11 are detachably connected, the other components in the main body shell 1 can be more conveniently installed and detached, and the components can be conveniently checked at any time. Meanwhile, the L-shaped limiting hole 12 can prevent the sealing cover 11 from being directly slipped off from the main body shell 1 during the installation and removal, and the connection stability between the main body shell 1 and the sealing cover 11 is ensured.

[0040] Specifically, the inner diameter of the main body shell 1 is 9 mm, the inner diameter of the piston 5 is 8.9 mm, the inner diameters of the liquid inlet 2 and the liquid outlet 3 are both 4 mm, and the inner diameter of the through hole 6 is the same as the inner diameters of the liquid inlet 2 and the liquid outlet 3. Specifically, the elastic member 10 is a compression spring.

[0041] In the embodiment, the vertical end of the L-shaped limiting hole 12 is arranged on the outer wall of the main body shell 1 along the axial direction, the other end of the L-shaped limiting hole 12 is arranged obliquely, and the included angle between the vertical end of the L-shaped limiting hole 12 and the other end of the L-shaped limiting hole 12 is less than 90 degrees. When the sealing cover 11 is completely covered on the main body shell 1, the distance between the sealing cover 11 and the end of the piston 5 which is close to the front end of the main body shell 1 is less than the length of the elastic member 10. In this way, since the distance between the sealing cover 11 and the end of the piston 5 which is close to the front end of the main body shell 1 is less than the length of the elastic member 10, the elastic member 10 is in a compressed state, the elastic member 10 tightly abuts against the sealing cover 11 under the elastic potential energy of the elastic member 10, and the L-shaped limiting hole 12 can be effectively prevented from being accidentally rotated and separated from the main body shell 1 under the friction of external force due to the oblique arrangement of the other end of the L-shaped limiting hole 12, and the connection stability between the main body shell 1 and the sealing cover 11 is effectively ensured.

[0042] In the embodiment, the L-shaped limiting holes 12 are arranged on the opposite sides of the main body shell 1, the limiting columns 13 are arranged on the opposite sides of the outer wall of the sealing cover 11, and the two L-shaped limiting holes 12 and the two limiting columns 13 are arranged one by one. In this way, the connection stability between the main body shell 1 and the sealing cover 11 can be further improved, and the sealing cover 11 can be prevented from being lifted on one side. In alternative embodiments, the L-shaped limiting holes 12 on the main body shell 1 can also be three or more, and the three or more L-shaped limiting holes 12 are uniformly and axially arranged on the outer wall of the main body shell 1.

[0043] In the embodiment, the piston 5 is provided with a first seal 8 and a second seal 9, which are respectively arranged near the upper and lower ends of the piston 5 and are respectively arranged on the opposite sides of the through hole 6. In this way, compared with the piston 5 sealed on one side, the piston 5 sealed on both sides can ensure the sealing of the upper and lower sides of the through hole 6 in the open state of the channel, effectively preventing liquid leakage.

[0044] Specifically, the first seal 8 and the second seal 9 are both O-shaped sealing rings, and the first seal 8 is arranged obliquely on the piston 5. In this way, by obliquely installing the first seal 8, the performance and durability of the first seal 8 in a high-speed and high-sealing-pressure environment can be improved, effectively prolonging the service life of the first seal 8.

[0045] In the embodiment, the piston 5 is provided with a first seal 8 and a second seal 9, which are respectively arranged near the upper and lower ends of the piston 5 and are respectively arranged on the opposite sides of the through hole 6. In this way, compared with the piston 5 sealed on one side, the piston 5 sealed on both sides can ensure the sealing of the upper and lower sides of the through hole 6 in the open state of the channel, effectively preventing liquid leakage.

[0046] In this way, the elastic member 10 can be positioned and guided through the first mounting hole and the second mounting hole, avoiding the distortion of the elastic member 10 when it is compressed.

[0047] In summary, the control valve structure for the endoscope aspirator can push the piston 5 to the front end of the main body shell 1 until it cannot advance any further. At this time, the through hole 6 on the piston 5 is in communication with the liquid inlet 2 and the liquid outlet 3 on the main body shell 1, forming a straight channel for the smooth passage of liquid or gas, and the elastic member 10 is in a fully compressed state. When the force applied to the piston 5 is released, the elastic member 10 rebounds under the elastic potential energy and pushes the piston 5 away from the front end of the main body shell 1. At this time, the through hole 6 on the piston 5 is disconnected from the communication channel with the liquid inlet 2 and the liquid outlet 3 on the main body shell 1, thereby isolating the liquid or gas. Since the formed passage is straight, the stroke of the piston 5 is greatly shortened when the flow channels on both sides are opened or closed, so the user can operate more simply by pushing the piston 5 to open the channel. The first relief hole 4 and the second relief hole 7 provided on the main body shell 1 and the piston 5, respectively, can ensure the smoothness of the piston 5 when it is pushed, without the need for other skills to control. Since the stroke of the piston 5 is short, the piston 5 can effectively ensure the operation efficiency when it is operated continuously. At the same time, the short-stroke piston 5 structure of the present application is simple, and the production material investment is small, which can effectively reduce the manufacturing cost of medical equipment and in turn reduce the operating cost of medical institutions.

[0048] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A control valve structure for an endoscope suction device, characterized by, The utility model provides a kind of liquid injection device, including: Main body shell (1), the opposite sides of the side wall of which are respectively provided with liquid inlet (2) and liquid outlet (3), the head end of the main body shell (1) is closed, the side wall of the main body shell (1) is provided with first pressure relief hole (4); Piston (5), which is movably connected to the main body shell (1), one end of the piston (5) is located inside the main body shell (1), a through hole (6) is formed in the side wall of the piston (5), the through hole (6) is correspondingly provided with the liquid inlet (2) and the liquid outlet (3) at both ends, and a second pressure relief hole (7) is also formed in the side wall of the piston (5); Elastic member (10), which is elastically connected between the inside of the head end of the main body shell (1) and the piston (5), when the piston (5) is pushed towards the head end of the main body shell (1) and the elastic member (10) is completely compressed, the through hole (6) can be in communication with the liquid inlet (2) and the liquid outlet (3).

2. The control valve structure for an endoscope suction apparatus according to claim 1, characterized by, The piston (5) is provided with a first sealing member (8) and a second sealing member (9), the first sealing member (8) and the second sealing member (9) are respectively arranged near the upper and lower ends of the piston (5) and are respectively arranged on the opposite sides of the through hole (6).

3. The control valve structure for an endoscope suction apparatus according to claim 2, characterized by, The first sealing member (8) and the second sealing member (9) are both O-shaped sealing rings, and the first sealing member (8) is arranged obliquely on the piston (5).

4. The control valve structure for an endoscope suction apparatus according to claim 1, characterized by, The head end of the main body shell (1) is through, the main body shell (1) is provided with a sealing cover (11) covering the head end, and the elastic member (10) is connected between the sealing cover (11) and the piston (5).

5. The control valve structure for an endoscope suction apparatus according to claim 4, characterized by An L-shaped limiting hole (12) is formed in the side wall of the head end of the main body shell (1), a limiting column (13) is arranged on the outer wall of the sealing cover (11) and matches the L-shaped limiting hole (12), and the sealing cover (11) is detachably arranged on the head end of the main body shell (1).

6. The control valve structure for an endoscope suction apparatus according to claim 5, characterized by The vertical end of the L-shaped limiting hole (12) is arranged on the outer wall of the main body shell (1) along the axial direction, the other end of the L-shaped limiting hole (12) is arranged obliquely, the included angle between the vertical end of the L-shaped limiting hole (12) and the other end of the L-shaped limiting hole (12) is less than 90 degrees, and when the sealing cover (11) is completely covered on the main body shell (1), the distance between the sealing cover (11) and one end of the piston (5) close to the front end of the main body shell (1) is less than the length of the elastic member (10).

7. The control valve structure for an endoscope suction apparatus according to claim 6, characterized by The opposite sides of the main body shell (1) are both provided with the L-shaped limiting hole (12), the opposite sides of the outer wall of the sealing cover (11) are both provided with the limiting column (13), and the two L-shaped limiting holes (12) and the two limiting columns (13) are correspondingly arranged.

8. The control valve structure for an endoscope suction apparatus according to claim 4, characterized by The piston (5) is provided with a first mounting hole (14) on one end surface close to the head end of the main body shell (1), the sealing cover (11) is provided with a second mounting hole corresponding to the first mounting hole (14) on one end close to the main body shell (1), and the two ends of the elastic member (10) are respectively mounted in the first mounting hole (14) and the second mounting hole.

9. The control valve structure for an endoscope suction apparatus according to claim 1, characterized by, The inner diameter of the main body shell (1) is 8-10 mm, the inner diameter of the piston (5) is 7.9-9.9 mm, the inner diameters of the liquid inlet (2) and the liquid outlet (3) are both 3-5 mm, and the inner diameter of the through hole (6) is the same as that of the liquid inlet (2) and the liquid outlet (3).

10. The control valve structure for an endoscope suction apparatus according to claim 1, characterized by, The elastic member (10) is a compression spring.

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