Toggle valve

Abstract

The utility model relates to a toggle valve which comprises a valve body, a valve element, a valve shaft, an elastic component and a shifting rod. The deflector rod is rotationally connected with the valve shaft, and when the deflector rod rotates relative to the valve shaft, the deflector rod is supported at the top end of the valve body and controls the axial movement of the valve shaft together with the elastic component; the driving lever is provided with a first limit position and a second limit position, the valve body is in an open state when the driving lever is in the first limit position, the driving lever comprises an operating part and a rotating part, and when the driving lever is in the first limit position, the part, farthest from the operating part, of the parts, abutting against the valve body, of the rotating part is a first abutting part; the portion, farthest from the rotating portion, of the portions, abutting against the valve body, of the operating portion is a second abutting portion, and the first abutting portion and the second abutting portion are located on the two sides of the vertical plane where the rotating center axis of the deflector rod is located respectively. According to the toggle valve, the first abutting part and the second abutting part are located on the two sides of the vertical face where the rotating central axis of the shifting rod is located respectively, so that the shifting rod is not prone to rebounding to close the valve body, and the stability of the valve body in the opening state is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of valve technology, and in particular to a toggle valve. Background Art

[0002] As a type of control valve, a toggle valve features a drive shaft connected to the valve core and extending out of the valve body. A paddle mechanism is rotatably connected to the drive shaft. By rotating the paddle, the drive shaft moves up and down, opening or closing the valve body. Compared to other valves, this valve can be operated by simply rotating the drive paddle, allowing for rapid changes in the fluid's motion within the valve body.

[0003] To ensure the sealing performance of the internal valve core, a spring is installed inside the toggle valve to apply force to the valve core toward the valve seat. This allows the valve core to tightly abut the valve seat when needed, thereby sealing the valve body. However, to facilitate the rotation of the lever, the end of the lever is provided with a curved surface. When the valve body is in the open state, the lever is prone to automatic rebound. In particular, if the lever is rotated a small angle from the open position toward the closing position due to reasons such as the valve body, the lever can easily continue to rotate in the direction of closing the valve body under the force of the spring, automatically rebounding to the closed state, causing the valve body to be unable to remain stably in the open state. Utility Model Content

[0004] Based on this, it is necessary to provide a toggle valve that can keep the valve body stably in the open state.

[0005] The present application provides a toggle valve, comprising: a valve body, a valve core, a valve shaft, an elastic component and a shift rod; the valve body has an inlet flow channel, a liquid outlet flow channel and a valve seat located between the inlet flow channel and the outlet flow channel; the valve core is located inside the valve body; the valve shaft is connected to the valve core, and the valve shaft drives the valve core to open and close the valve seat by axially moving within the valve body, and the top end of the valve shaft extends out of the valve body; the elastic component is arranged inside the valve body and is used to apply a force to the valve shaft in the direction of the valve seat; the shift rod is rotatably connected to the part of the valve shaft extending out of the valve body by a rotating shaft, and when the shift rod rotates relative to the valve shaft, the shift rod will be supported on the top end of the valve body and jointly control the axial movement of the valve shaft with the elastic component; wherein, the rotation of the shift rod relative to the valve shaft has a first limit position and a second extreme position, the valve body is in an open state when the first extreme position is reached, and the valve body is in a closed state when the second extreme position is reached; the lever includes an operating part and a rotating part provided at one end of the operating part, the rotating part having a contact surface, and the contact surface always contacts the valve body when the lever rotates; when the lever is in the first extreme position, the part of the part where the rotating part contacts the valve body and is farthest from the operating part is defined as a first contact portion, and the part of the part where the operating part contacts the valve body and is farthest from the rotating part is defined as a second contact portion, and the first contact portion and the second contact portion are respectively located on both sides of the vertical plane where the central axis of the rotating shaft is located.

[0006] The toggle valve provided in the present application is located on both sides of the vertical plane where the central axis of the rotating shaft is located, through the first supporting part and the second supporting part. When the lever rotates a small distance in the direction of closing the valve body, only the rotating part of the lever and the valve body are in contact, and the operating part of the lever and the valve body are not in contact. At this time, the supporting force of the valve body on the rotating part and the force of the rotating shaft on the lever form a torque, and the torque will make the lever tend to return to the first extreme position, thereby ensuring that the lever is not likely to rebound and close the valve body, thereby ensuring the stability of the valve body in the open state.

[0007] In one embodiment, the shift lever is provided with an abutment wall that abuts against the top end of the valve body, so that when the shift lever rotates from the second extreme position to the first extreme position and the first abutment portion is located directly below the central axis of the rotating shaft, the shift lever is provided with a gap with the top end of the valve body through the abutment wall so that the shift lever can continue to rotate and the first abutment portion can be moved to the side of the central axis of the rotating shaft away from the operating portion.

[0008] In this way, by changing the structure on the lever, the first supporting portion can be moved from one side of the center of the rotating shaft to the other side of the center of the rotating shaft during the opening of the valve body, and when the valve body is finally opened, the first supporting portion and the second supporting portion are respectively located on both sides of the vertical plane where the axis of the center of the rotating shaft is located, thereby avoiding the rebound of the lever when the valve body is opened.

[0009] In one embodiment, a groove is provided on the shift rod, the groove wall constitutes the abutment wall, and the second abutment portion is located on the groove wall; when the shift rod is in the first extreme position, the groove is used to realize that the shift rod forms an avoidance portion between the first abutment portion and the second abutment portion that does not contact the top end of the valve body.

[0010] In this way, when the lever is in the first extreme position, only the first abutment portion of the rotating part contacts the valve body, and only the second abutment portion of the operating part contacts the valve body. The downward force of the rotating shaft on the lever is located between the upward support force of the valve body on the rotating part and the upward support force of the valve body on the operating part, and the three forces converge at one point. The three forces form a balance, eliminating the torque effect of the lever rotation, so that the lever can stably maintain the first extreme position without rotating in the direction of closing the valve body.

[0011] In one embodiment, a first inclined surface is provided at the top of the valve body, so that when the lever rotates from the second extreme position to the first extreme position and the first abutting portion is located directly below the central axis of the rotating shaft, a gap is created between the top of the valve body and the operating portion through the first inclined surface so that the lever can continue to rotate and the first abutting portion can move to the side of the central axis of the rotating shaft away from the operating portion.

[0012] Thus, by providing the first inclined surface at the top of the valve body, the first abutting portion can move from one side of the central axis of the rotating shaft to the other side during the opening of the valve body. Consequently, when the lever is slightly rotated from the first extreme position to the second extreme position, only the first abutting portion of the lever contacts the top of the valve body. The force exerted by the valve body on the lever and the force exerted by the rotating shaft on the lever form a torque, which tends to cause the lever to return to the first extreme position, effectively preventing the lever from automatically rebounding to the second extreme position and causing the valve body to automatically close.

[0013] In one embodiment, the abutting surface is an arc-shaped surface, and the central axis of the abutting surface is not colinear with the central axis of the rotating shaft.

[0014] Thus, the arcuate abutment surface allows for smoother rotation of the lever. When the lever rotates about the central axis of the rotating shaft, different locations of the abutment surface abut against the valve body. Because the central axis of the abutment surface and the central axis of the rotating shaft are not collinear, the distances between the abutment surface and the rotating shaft vary. As a result, when the lever rotates about the central axis of the rotating shaft, the distance between the rotating shaft and the valve body can be changed, allowing the valve shaft to move axially along the valve body, thereby controlling the valve core to open and close the valve body.

[0015] In one embodiment, a plane perpendicular to the rotation center line of the lever is used as a reference plane, the orthographic projection of the first supporting portion on the reference plane is a first projection, the orthographic projection of the rotation center axis of the lever on the reference plane is a second projection, the line connecting the first projection and the second projection is a projection line, and the angle between the projection line and the vertical line is θ, θ ≥ 5°.

[0016] In this way, when the lever rotates from the first limit position to the second limit position and the rotation angle is less than or equal to θ, the force of the rotating shaft can make the lever tend to return to the first limit position, thereby ensuring the stability of the valve body's open state. θ≥5° ensures that the lever has a sufficient allowable rotation angle, and the lever can return to the first limit position within the angle range of θ.

[0017] In one embodiment, the shift rod directly abuts against the end face of the valve body; or, a gasket is provided between the valve body and the shift rod, the valve shaft passes through the gasket, and the shift rod indirectly abuts against the end face of the valve body by abutting against the gasket.

[0018] The lever directly abuts the end face of the valve body, resulting in a very simple structure and reducing production costs. The lever indirectly abuts the end face of the valve body by abutting against the gasket, reducing wear on the valve body and extending its service life, thereby reducing costs.

[0019] In one embodiment, the hardness of the gasket is less than the hardness of the valve body and the shift rod.

[0020] In this way, the gasket deforms when the lever contacts it, increasing the contact area between the gasket and lever. This reduces the pressure between the lever and the gasket, effectively slowing wear between the lever and the gasket during rotation, preventing excessive wear from affecting the valve opening. The gasket is preferably made of a material with a low hardness and a smooth surface, such as fluororesins such as PTFE or PFA.

[0021] In one embodiment, the gasket is rotatable relative to the valve shaft; and / or the inner diameter of the gasket is larger than the outer diameter of the valve shaft.

[0022] The gasket can rotate relative to the valve shaft, allowing its position to be adjusted during use, allowing the lever and gasket to contact different locations. This prevents the gasket from contacting the lever at only one location, which could cause severe wear and tear, thereby extending the gasket's service life. The gasket's inner diameter is larger than the valve shaft's outer diameter. This ensures that when the pressure between the lever and gasket is too high, the lever's rotation will cause the gasket to move a certain distance, reducing relative slip between the gasket and lever. This prevents excessive pressure between the lever and gasket, which could cause the lever and gasket to continue to slide relative to each other, leading to increased wear on the lever, gasket, and other components.

[0023] In one embodiment, the outer diameter of the gasket is D1, the inner diameter of the gasket is D4, the outer diameter of the end surface of the valve body in contact with the gasket is D2, the maximum outer diameter of the valve shaft that can abut against the gasket is D3, and D1-D2≥D4-D3.

[0024] In this way, when the lever rotates to drive the gasket to move on the top of the valve body, the gasket can always cover the top surface of the valve body, thereby preventing the lever from directly contacting the top surface of the valve body, thereby ensuring the effectiveness of the gasket. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the conventional technology, the following briefly introduces the drawings required for use in the embodiments or the conventional technology descriptions. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 This is a three-dimensional diagram of the toggle valve of Example 1 of the present application when the lever is in the second extreme position;

[0027] Figure 2 for Figure 1 a cross-sectional view of the toggle valve shown;

[0028] Figure 3 This is a cross-sectional view of the toggle valve of Example 1 of the present application when the lever is in the first limit position;

[0029] Figure 4 This is a schematic diagram of the partial structure of the toggle valve of Example 1 of the present application;

[0030] Figure 5 This is a schematic diagram of the process of switching the lever between the first extreme position and the second extreme position in Example 1 of the present application;

[0031] Figure 6 This is a schematic diagram of the cover and valve shaft structure of Example 1 of the present application;

[0032] Figure 7 This is a partial structural diagram of a toggle valve according to the second embodiment of the present application;

[0033] Figure 8 This is a schematic diagram of the partial structure of the toggle valve of Example 3 of the present application.

[0034] Figure numerals: 10, valve body; 11, liquid inlet channel; 12, liquid outlet channel; 13, valve seat; 14, seat body; 15, cover body; 16, first inclined surface; 17, limiting hole; 20, valve core; 30, valve shaft; 31, limiting portion; 40, elastic member; 50, lever; 51, rotating portion; 511, first abutting portion; 512, abutting surface; 52, operating portion; 522, second abutting portion; 53, abutting wall; 54, groove; 60, rotating shaft; 70, gasket. DETAILED DESCRIPTION

[0035] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0036] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "connected to" another component, it may be directly connected to the other component or there may be a central component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the specification of this application are for illustrative purposes only and do not represent the only implementation method.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0038] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first feature is directly in contact with the second feature, or the first feature and the second feature are indirectly in contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0039] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the relevant listed items.

[0040] See Figures 1 to 6 The present application provides a toggle valve, comprising: a valve body 10 , a valve core 20 , a valve shaft 30 , an elastic member 40 and a shift rod 50 .

[0041] The valve body 10 has an inlet channel 11, an outlet channel 12, and a valve seat 13 located between the inlet channel 11 and the outlet channel 12. A valve core 20 is located within the valve body 10, and a valve shaft 30 is connected to the valve core 20. The valve shaft 30 drives the valve core 20 to open and close the valve seat 13 by axially moving within the valve body 10, thereby achieving on-off control of the inlet channel 11 and the outlet channel 12. The top end of the valve shaft 30 extends out of the valve body 10 to facilitate its connection with the lever 50. An elastic member 40 is disposed within the valve body 10 and is used to apply a force toward the valve seat 13 to the valve shaft 30, causing it to tend to move toward the valve seat 13. When the valve body is closed, the elastic member 40 increases pressure, causing the valve core 20 to fit tightly against the valve seat 13, ensuring that the valve core 20 can seal against the valve seat 13, thereby achieving toggle valve closure.

[0042] The lever 50 is rotatably connected to the portion of the valve shaft 30 extending out of the valve body 10 via a rotating shaft 60. When the lever 50 rotates relative to the valve shaft 30, the lever 50 is supported on the top of the valve body 10 and, together with the elastic member 40, controls the axial movement of the valve shaft 30. The lever 50 has a first and second limit positions for rotation relative to the valve shaft 30. In the first limit position, the valve body 10 is in an open state, i.e., the liquid inlet channel 11 and the liquid outlet channel 12 are connected. Figure 3 In the second limit position, the valve body 10 is in a closed state, that is, the liquid inlet channel 11 and the liquid outlet channel 12 are disconnected. Figure 1 and Figure 2 , the shift lever 50 is in the second extreme position.

[0043] See Figure 2 and Figure 3To facilitate installation of the valve core 20, the valve body 10 includes a seat 14 and a cover 15. The liquid inlet channel 11, the liquid outlet channel 12, and the valve seat 13 are all disposed within the seat 14. The cover 15 is connected to the upper end of the seat 14 and, together with the seat 14, encloses a valve cavity. The valve core 20, the valve shaft 30, and the elastic member 40 are all installed within the valve cavity. The valve core 20 is a diaphragm valve core, and the elastic member 40 is a spring. The ends of the spring abut against the cover 15 and the valve shaft 30, exerting a force on the valve shaft 30 toward the valve seat 13, thereby forcing the valve core 20 against the valve seat 13. Of course, the specific structure and connection method of the valve body 10, valve core 20, valve shaft 30, and elastic member 40 are not limited to those shown in the figures. Any suitable structure will suffice as long as the rotation of the lever 50 can drive the valve shaft 30 to move axially along the valve body 10, thereby controlling the movement of the valve core 20 and achieving opening and closing control of the valve body 10.

[0044] Reference Figure 2 as well as Figure 4 The lever 50 includes an operating portion 52 and a rotating portion 51 disposed at one end of the operating portion 52. The rotating portion 51 has an abutting surface 512 that always abuts against the valve body 10 when the lever 50 rotates. When the lever 50 is in the first extreme position, the portion of the rotating portion 51 abutting against the valve body 10 that is farthest from the operating portion 52 is defined as a first abutting portion 511. The portion of the operating portion 52 abutting against the valve body 10 that is farthest from the rotating portion 51 is defined as a second abutting portion 522. The first abutting portion 511 and the second abutting portion 522 are respectively located on either side of a vertical plane containing the central axis of the rotating shaft 60. In other words, the first abutting portion 511 and the second abutting portion 522 are respectively located on either side of a vertical plane containing the central axis of the rotation axis of the lever 50.

[0045] So, refer to Figure 5 c. When the lever 50 rotates a small distance in the direction of closing the valve body 10, only the rotating portion 51 of the lever 50 abuts against the valve body 10, and the operating portion 52 of the lever 50 does not contact the valve body 10. At this time, the supporting force of the valve body 10 on the rotating portion 51 and the force of the rotating shaft 60 on the lever 50 form a torque, and this torque will cause the lever 50 to return to the first limit position ( Figure 5 d), thereby ensuring that the lever 50 is not prone to rebounding and closing the valve body 10, thereby ensuring the stability of the open state of the valve body 10.

[0046] Further, see Figure 4 as well as Figure 5 The lever 50 is provided with an abutting wall 53 abutting against the top of the valve body 10, so that when the lever 50 rotates from the second limit position to the first limit position and the first abutting portion 511 is located directly below the central axis of the rotating shaft 60 (refer to Figure 5b) A gap is created between the lever 50 and the top end of the valve body 10 via the abutment wall 53, allowing the lever 50 to continue rotating and allowing the first abutment portion 511 to move to the side of the central axis of the rotating shaft 60 away from the operating portion 52. This embodiment utilizes a simple structure to achieve the positioning of the first abutment portion 511 and the second abutment portion 522 on either side of the vertical plane of the central axis of the rotating shaft 60.

[0047] See Figure 4 as well as Figure 5 A slot 54 is provided on the shift lever 50 , the slot wall of the slot 54 constitutes the abutting wall 53 , and the second abutting portion 522 is located on the slot wall of the slot 54 .

[0048] The process of switching between the second limit position and the first limit position of the lever 50 is as follows: Figure 5 The process of switching from the second limit position to the first limit position is now explained: Figure 5 a, at this time the lever 50 is in the second limit position, the valve is in a closed state; toggle the lever 50 to rotate it to Figure 5 b, at this time, the first abutting portion 511 is located directly below the central axis of the rotating shaft 60. Due to the arrangement of the slot 54, there is a gap between the slot wall of the slot 54 and the top of the valve body 10, so that the lever 50 can continue to rotate, so that the first abutting portion 511 rotates to the side of the vertical plane where the central axis of the lever 50 is located, away from the operating portion 52. At this time, Figure 5 Continue to rotate the lever 50 and make the lever 50 in the first limit position, that is, Figure 5 d, at this time, only the first abutting portion 511 of the rotating portion 51 contacts the valve body 10, and only the second abutting portion 522 of the operating portion 52 contacts the valve body 10, and the Figure 4 At this time, the lever 50 is subjected to the downward force F3 of the rotating shaft 60, the rotating part 51 is subjected to the upward support force F1 of the valve body 10, and the operating part 52 is subjected to the support force F2 of the tilt of the valve body 10. The three forces converge at one point, and the three forces form a balance, eliminating the torque effect of the rotation of the lever 50, so that the lever 50 can be stably maintained in the first extreme position without rotating in the direction of closing the valve body 10.

[0049] Furthermore, when the lever 50 is in the first limit position (see Figure 5 d) The end of the operating portion 52 away from the rotating portion 51 is located outside the top end of the valve body 10. In this way, when the lever 50 is in the first extreme position, the center of gravity of the lever 50 is biased toward the operating portion 52, so that the lever 50 is less likely to rebound and close the valve body 10.

[0050] Furthermore, the abutment surface 512 is an arcuate surface, which facilitates smoother rotation of the lever 50. The central axis of the abutment surface 512 is not collinear with the central axis of the rotating shaft 60. Thus, when the lever 50 rotates about the central axis of the rotating shaft 60, different positions of the abutment surface 512 abut against the valve body 10. Because the central axis of the abutment surface 512 is not collinear with the central axis of the rotating shaft 60, the distance between the abutment surface 512 and the rotating shaft 60 varies at different positions. As a result, when the lever 50 rotates about the central axis of the rotating shaft 60, the distance between the rotating shaft 60 and the valve body 10 can be varied, allowing the valve shaft 30 to move axially along the valve body 10, thereby controlling the valve core 20 to open and close the valve body 10.

[0051] See Figure 5 d. Taking a plane perpendicular to the rotational centerline of the lever 50 as a reference plane, the orthographic projection of the first abutting portion 511 on the reference plane is the first projection, the orthographic projection of the rotational axis of the lever 50 on the reference plane is the second projection, the line connecting the first and second projections is the projection line, and the angle between the projection line and the vertical line is θ, where θ ≥ 5°. In this way, when the lever 50 rotates from the first limit position toward the second limit position, and the rotation angle is less than or equal to θ, the force applied by the rotating shaft 60 can cause the lever 50 to tend to return to the first limit position, thereby ensuring the stability of the valve body 10 in the open state. A value of θ ≥ 5° ensures that the lever 50 has a sufficient allowable rotation angle, allowing it to return to the first limit position within the angle range of θ.

[0052] It is understood that the contact between the abutting surface 512 of the lever 50 and the valve body 10 described herein may be direct or indirect contact between the abutting surface 512 and the valve body 10. The lever 50 may directly contact the end surface of the valve body 10, which simplifies the structure and helps reduce production costs.

[0053] However, the lever 50 directly contacts the valve body 10. During operation, the contact between the lever 50 and the valve body 10 may wear out. As a result, after long-term use, the opening degree of the toggle valve may change when it is opened. Figures 1 to 5 In another embodiment, a gasket 70 is provided between the valve body 10 and the lever 50, and the valve shaft 30 is passed through the gasket 70. The lever 50 is indirectly supported against the end face of the valve body 10 by supporting against the gasket 70. In this way, the wear on the valve body 10 can be reduced, which is beneficial to extending the service life of the valve body 10 and reducing costs.

[0054] Furthermore, the hardness of the gasket 70 is less than that of the valve body 10 and the lever 50. Thus, when the lever 50 contacts the gasket 70, the gasket 70 deforms, thereby increasing the contact area between the gasket 70 and the lever 50. This reduces the pressure between the lever 50 and the gasket 70, thereby effectively reducing wear between the lever 50 and the gasket 70 during rotation of the lever 50, and preventing excessive wear from affecting the opening of the valve body 10.

[0055] In one embodiment, the lever 50 and valve seat 13 are both made of PVDF (polyvinylidene fluoride), and the gasket 70 is made of PTFE (polytetrafluoroethylene) or PFA (soluble polytetrafluoroethylene). This allows the gasket 70 to have a lower hardness than the lever 50 and valve seat 13. PTFE has a lower surface friction coefficient, and the smooth surface of the PTFE gasket 70 further reduces wear between the gasket 70 and the lever 50. Furthermore, PTFE has lower elasticity than rubber, ensuring that the gasket 70 does not significantly deform under pressure, thereby preventing it from affecting the opening of the valve body 10. However, the lever 50, valve seat 13, and gasket 70 may also be made of other materials, as long as the hardness of the gasket 70 is lower than that of the valve body 10 and lever 50.

[0056] In one embodiment, the gasket 70 is rotatable relative to the valve shaft 30. Thus, the position of the gasket 70 can be adjusted during use so that the lever 50 and the gasket 70 contact each other at different positions, thereby avoiding the gasket 70 contacting the lever 50 at only one point and causing severe wear, thereby extending the service life of the gasket 70.

[0057] Furthermore, the inner diameter of the gasket 70 is larger than the outer diameter of the valve shaft 30. In this way, when the lever 50 rotates, the gasket 70 can be driven to move a certain distance, thereby reducing the relative sliding between the gasket 70 and the lever 50, and further reducing the wear between the gasket 70 and the lever 50.

[0058] Furthermore, the outer diameter of the gasket 70 is D1, the inner diameter of the gasket 70 is D4, the outer diameter of the end surface of the valve body 10 where it contacts the gasket 70 is D2, and the maximum outer diameter of the valve shaft 30 where it can contact the gasket 70 is D3, where D1 - D2 ≥ D4 - D3. This ensures that when the lever 50 rotates and drives the gasket 70 to move at the top of the valve body 10, the gasket 70 always blocks the top surface of the valve body 10, thereby preventing the lever 50 from directly contacting the top surface of the valve body 10 and ensuring the effectiveness of the gasket 70.

[0059] See Figure 6The valve body 10 is provided with a limiting hole 17 that communicates with the interior of the valve body 10. The valve shaft 30 is inserted into the limiting hole 17 so that one end of the valve shaft 30 extends out of the valve body 10. The valve shaft 30 is provided with a limiting portion 31. When the lever 50 is in the first limit position, the second limit position, or when switching between the first and second limit positions, the limiting portion 31 remains inserted into the limiting hole 17. The limiting portion 31 has a non-circular cross-section, and the limiting hole 17 is a non-circular hole that matches the limiting portion 31. Thus, the limiting portion 31 cooperates with the limiting hole 17 to prevent the valve shaft 30 from rotating relative to the valve body 10. Consequently, when the lever 50 rotates, the valve shaft 30 moves only axially of the valve body 10 and does not rotate circumferentially. Rotation of the lever 50 can precisely control the opening and closing states of the valve body 10.

[0060] In this embodiment, the gasket 70 is an annular gasket, and “the gasket 70 can block the top surface of the valve body 10 ” means that the gasket 70 can block the top surface of the valve body 10 corresponding to the abutting surface 512 of the lever 50 .

[0061] Furthermore, the lever 50 is detachably connected to the rotating shaft 60. In this way, when the gasket 70 is severely worn, the lever 50 can be removed and replaced. Moreover, when there is a processing error in the distance between the lever 50 and the top surface of the valve body 10, the error can be compensated by using gaskets 70 of different thicknesses or quantities.

[0062] Example 2

[0063] See Figure 7 , which is different from the first embodiment, is that, in this embodiment, an outer wall of one side of the shift lever 50 forms an abutment wall 53, and the abutment wall 52 is not tangentially arranged with the first abutment portion 511, and when the first abutment portion 511 is located directly below the central axis of the rotating shaft 60, there is a gap between the abutment wall 53 and the top end of the valve body 10, so that the shift lever 50 can rotate toward the first extreme position, so that the first abutment portion 511 and the second abutment portion 522 are respectively located on both sides of the vertical plane where the central axis of the rotating shaft 60 is located.

[0064] In this embodiment, when the lever 50 is in the first extreme position, the portion of the abutment wall 53 between the first abutment portion 511 and the second abutment portion 522 contacts the valve body 10 , and the cross-section of the first abutment portion 511 is located on the lower side of the abutment wall 53 .

[0065] Example 3

[0066] See Figure 8This embodiment differs from the first embodiment in that a first inclined surface 16 is provided at the top of the valve body 10. This ensures that when the lever 50 rotates from the second extreme position to the first extreme position and the first abutting portion 511 is located directly below the central axis of the rotating shaft 60, a gap is created between the top of the valve body 10 and the operating portion 52 via the first inclined surface 16, allowing the lever 50 to continue rotating and allowing the first abutting portion 511 to move to the side of the rotating shaft 60 central axis away from the operating portion 52. Thus, by providing the first inclined surface 16 at the top of the valve body 10, when the lever 50 is in the first extreme position, the first abutting portion 511 and the second abutting portion 522 are located on either side of the vertical plane of the central axis of the rotating shaft 60. The valve body 10 of this embodiment is very simple in structure and easy to manufacture.

[0067] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0068] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of patent protection for the present application shall be determined by the appended claims.

Claims

1. A toggle valve, comprising: The valve body comprises a liquid inlet flow channel, a liquid outlet flow channel and a valve seat located between the liquid inlet flow channel and the liquid outlet flow channel; The valve core is located inside the valve body; A valve shaft is connected to the valve core, and the valve shaft drives the valve core to open and close the valve seat by axial movement in the valve body, and the top end of the valve shaft extends out of the valve body; An elastic member is provided inside the valve body and is used to apply a force on the valve shaft toward the valve seat; as well as The lever is rotatably connected to the portion of the valve shaft extending out of the valve body via a rotating shaft. When the lever rotates relative to the valve shaft, the lever is supported on the top of the valve body and works together with the elastic member to control the axial movement of the valve shaft. The lever rotates relative to the valve shaft to have a first limit position and a second limit position. When the lever is in the first limit position, the valve body is in an open state. When the lever is in the second limit position, the valve body is in a closed state. The feature is that the lever comprises an operating portion and a rotating portion provided at one end of the operating portion, the rotating portion having an abutting surface, and the abutting surface always abuts against the valve body when the lever rotates; When the lever is in the first extreme position, the part of the part where the rotating part and the valve body abut against each other that is farthest from the operating part is defined as a first abutting part, and the part of the part where the operating part and the valve body abut against each other that is farthest from the rotating part is defined as a second abutting part, and the first abutting part and the second abutting part are respectively located on both sides of the vertical plane where the central axis of the rotating shaft is located.

2. The toggle valve according to claim 1, characterized in that: The lever is provided with an abutment wall that abuts against the top end of the valve body, so that when the lever rotates from the second extreme position to the first extreme position and the first abutment portion is located directly below the central axis of the rotating shaft, the lever is provided with a gap with the top end of the valve body through the abutment wall so that the lever can continue to rotate and the first abutment portion can be moved to the side of the central axis of the rotating shaft away from the operating portion.

3. The toggle valve according to claim 2, characterized in that: The shift lever is provided with a groove, the groove wall of the groove constitutes the abutment wall, and the second abutment portion is located on the groove wall; When the shifting rod is at the first limit position, the shifting rod forms an escape portion between the first abutting portion and the second abutting portion through the cutting groove, which does not contact the top end of the valve body.

4. The toggle valve according to claim 1, characterized in that The top end of the valve body is provided with a first inclined surface, so that when the lever rotates from the second extreme position to the first extreme position and the first abutting portion is located directly below the central axis of the rotating shaft, a gap is created between the top end of the valve body and the operating portion through the first inclined surface so that the lever can continue to rotate and the first abutting portion can move to the side of the central axis of the rotating shaft away from the operating portion.

5. The toggle valve according to claim 1, characterized in that: The abutting surface is an arc-shaped surface, and the central axis of the abutting surface is not collinear with the central axis of the rotating shaft.

6. The toggle valve according to claim 1, characterized in that Taking the plane perpendicular to the rotation center line of the lever as the reference plane, the orthographic projection of the first supporting portion on the reference plane is the first projection, the orthographic projection of the rotation center axis of the lever on the reference plane is the second projection, the line connecting the first projection and the second projection is the projection line, and the angle between the projection line and the vertical line is θ, θ ≥ 5°.

7. The toggle valve according to any one of claims 1 to 6, characterized in that: The lever directly abuts against the end surface of the valve body. Alternatively, a gasket is provided between the valve body and the shifting rod, the valve shaft passes through the gasket, and the shifting rod indirectly abuts against the end surface of the valve body by abutting against the gasket.

8. The toggle valve according to claim 7, characterized in that: The hardness of the gasket is smaller than the hardness of the valve body and the shifting rod.

9. The toggle valve according to claim 7, characterized in that: The gasket is capable of rotating relative to the valve shaft; And / or, the inner diameter of the gasket is larger than the outer diameter of the valve shaft.

10. The toggle valve according to claim 9, characterized in that The outer diameter of the gasket is D1, the inner diameter of the gasket is D4, the outer diameter of the end surface of the valve body in contact with the gasket is D2, and the maximum outer diameter of the valve shaft at which the valve shaft can abut against the gasket is D3. D1-D2≥D4-D3.

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