Manual valve

Abstract

The utility model discloses a manual valve, which comprises a valve main body, a valve core and a valve core, the operating assembly comprises a main shaft, a diaphragm connected with the main shaft and a hand wheel rotationally connected with the valve body, and the hand wheel is used for driving the main shaft to rotate so as to drive the diaphragm to move; the end face of the side, facing the hand wheel, of the valve body is provided with a plurality of circumferentially-distributed locking parts. The hand wheel comprises a wheel body, a mounting hole and a locking piece, and the inner wall of the mounting hole is circumferentially closed and penetrates through the wheel body in the axial direction of the main shaft; the locking piece is axially and movably connected with the mounting hole and has a first state in which the locking piece is matched with the locking part to limit the rotation of the hand wheel and a second state in which the locking piece is separated from the locking part, the inner wall of the mounting hole is peripherally closed, that is, the mounting hole is not provided with an open notch, so that the sharp edge is prevented from scratching fingers of a person or scratching gloves of the person; in addition, the circumferentially closed inner wall can play a role in circumferentially limiting the locking piece, so that the axial stable movement of the locking piece is ensured, and the locking piece can be conveniently matched with the locking part.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a manual valve. Background Technology

[0002] Manual valves, a special type of valve, move valve components by turning a handwheel, which in turn moves or deforms a diaphragm to open or close fluid channels or regulate the liquid flow rate in the open state. They are widely used in pipelines transmitting high-purity media such as ultrapure water. Most existing manual valves have handwheels that can rotate freely, posing a risk of misoperation. Therefore, some manufacturers have produced manual valves with locking mechanisms that lock the handwheel in place, keeping it in the closed or open state.

[0003] However, existing manual valves with locking mechanisms have the following problems: the handwheel has an open notch corresponding to the locking mechanism. When operating the locking mechanism, the operator's gloves or hands can easily get stuck between the notch and the locking mechanism, causing glove damage or hand injury. It can also easily lead to the contamination of the product by the operator's hands or make the hands susceptible to corrosion and damage from chemical substances. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a manual valve that solves the problem that the locking part on the handwheel of the existing manual valve can easily damage gloves or hands.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A manual valve, comprising,

[0007] The valve body has a fluid passage for fluid to pass through;

[0008] The operating components include a main shaft, a diaphragm connected to the main shaft, and a handwheel rotatably connected to the valve body. The handwheel is used to drive the main shaft to rotate, and the main shaft drives the diaphragm to change the state of the fluid in the fluid channel by rotating.

[0009] The valve body has several circumferentially distributed locking parts on the end face facing the handwheel.

[0010] The handwheel includes a wheel body, a mounting hole, and a locking element. The inner wall of the mounting hole is circumferentially closed and extends through the wheel body along the axial direction of the main shaft.

[0011] The locking member is axially movably connected to the mounting hole and has a first state in which it cooperates with the locking part to restrict the rotation of the handwheel and a second state in which it is separated from the locking part.

[0012] The manual valve of this invention restricts the rotation of the handwheel by engaging a locking element with a locking part on the valve body. Based on the position of the locking part, the locking element and the mounting hole on the handwheel are axially movable, meaning the locking element can move axially relative to the mounting hole, making the movement simpler. Furthermore, the inner wall of the mounting hole of this invention is circumferentially closed, meaning the mounting hole has no open notch, preventing sharp edges from scratching the fingers or tearing the gloves. In addition, the circumferentially closed inner wall can circumferentially limit the locking element, ensuring smooth axial movement of the locking element and facilitating the engagement between the locking element and the locking part.

[0013] Preferably, the locking member includes a pressing part, a connecting part connected to the bottom end of the pressing part, and a toggle part connected to the bottom end of the connecting part. The pressing part is axially movable with the mounting hole, and the toggle part is located below the mounting hole.

[0014] By pressing the pressing part, the locking member can move to the first state;

[0015] By moving the actuating part, the locking member can move to the second state.

[0016] The locking member is divided into a pressing part, a connecting part, and a toggle part along the axial direction. When the handwheel needs to be locked, the pressing part is pressed from top to bottom, and the locking member can move to the first state. When the handwheel needs to be turned, the locking member can be moved from the first state to the second state by toggling the toggle part.

[0017] Furthermore, during the transition of the locking member from the first state to the second state, even if the edge of the glove is close to the area between the side wall of the pressing part and the mounting hole, the glove will not get stuck between the side wall of the pressing part and the inner wall of the mounting hole. This prevents the glove from being caught in the relative movement between the locking member and the mounting hole during operation, thus avoiding damage to the glove. However, if the locking member moves upward, the glove is more likely to get stuck between the side of the pressing part and the inner wall of the mounting hole. But this is prevented by moving the actuating part located below the mounting hole to move the locking member upward as a whole. This ensures that the glove is not caught or trapped in the area of ​​relative movement between the locking member and the mounting hole during the upward movement of the locking member, thus preventing damage to the glove. Therefore, by assigning the two states of the locking member to different parts, the glove can be prevented from being trapped between the locking member and the mounting hole due to relative movement between them.

[0018] Preferably, the mounting hole is provided with a first limiting structure, the first limiting structure including a first inclined wall and a second inclined wall arranged vertically along the axial direction of the main shaft, the first inclined wall being inclined downward in the axial direction, and the second inclined wall being inclined upward in the axial direction;

[0019] The locking element further includes an elastic element, which is located in the mounting hole;

[0020] When the locking member moves along the mounting hole, the elastic member can be deformed by the action of the first inclined wall or the second inclined wall, and move to the second inclined wall or the first inclined wall.

[0021] When the elastic member abuts against the first inclined wall, the locking member is in the second state; when the elastic member abuts against the second inclined wall, the locking member is in the first state.

[0022] The function of the first limiting structure is to cooperate with the elastic element on the locking component, ensuring that the locking component remains in either the first or second state. This prevents the locking component from switching between the first and second states due to its own weight or environmental factors such as valve body vibration when not in operation. Specifically, the first limiting structure includes a first inclined wall and a second inclined wall. The first inclined wall, in cooperation with the elastic element, prevents the locking component from moving to the first state when not in operation; the second inclined wall, also in cooperation with the elastic element, prevents the locking component from moving to the second state when not in operation, thus preventing accidental unlocking of the handwheel. Furthermore, the inclination of the first and second inclined walls guides the locking component, allowing for easier axial movement when operated. The appropriate deformation of the elastic element in cooperation with the first and second inclined walls also provides a better tactile feel to the locking component, making it easier for the operator to confirm its position within the mounting hole.

[0023] Preferably, the angle between the first inclined wall and the axis of the mounting hole is A1, and the angle between the second inclined wall and the axis of the mounting hole is A2, satisfying A1 > A2.

[0024] In normal use, pressing the locking element is more convenient, while pushing it upwards is less effective. Therefore, the second inclined wall is made more inclined than the first, i.e., A1 > A2. This makes it easier for the elastic element to deform when it contacts the second inclined wall, allowing it to move more easily from bottom to top. This is suitable for situations where the locking element is easily pressed down but difficult to push upwards in actual use. More specifically, when the elastic element abuts against the inclined surface, the more inclined the surface (relative to the horizontal plane), the smaller the component perpendicular to the inclined surface and the larger the component parallel to the inclined surface in the contact force between the elastic element and the inclined surface. This means the elastic element can move more easily along the inclined surface.

[0025] Preferably, multiple elastic elements are provided, and the multiple elastic elements are arranged around the outside of the connecting portion;

[0026] The elastic element includes an axially extended portion fixed to the bottom end of the pressing portion, and a protruding portion that protrudes radially outward from the bottom end of the axially extended portion. The protruding portion can abut against the first inclined wall or the second inclined wall.

[0027] Multiple elastic elements are circumferentially distributed, allowing the locking element to be uniformly stressed circumferentially during axial movement, thus making the axial movement of the locking element more stable. The protrusions in the elastic elements abut against the first or second inclined wall to limit the locking element. During the axial movement of the locking element, the protrusions are subjected to the action of the first or second inclined wall, causing the axial extension to deform radially, thereby enabling the elastic element to pass over the first or second inclined wall. This allows the locking element to switch between the first and second states. In addition, this design also makes the locking element more tactile, allowing the operator to feel that the locking element has switched between the first and second states.

[0028] Preferably, a second limiting structure is also provided in the mounting hole. The second limiting structure is used to engage with the elastic element to limit the highest position of the locking element in the second state, so as to prevent the locking element from completely disengaging from the mounting hole when it moves from bottom to top. It also limits the elastic element of the locking element to ensure that the locking element can always move axially in the mounting hole.

[0029] Preferably, both the first limiting structure and the second limiting structure are circumferentially extending annular structures, and the second limiting structure is located on the upper side of the first limiting structure, so that the protrusion can be restricted between the first limiting structure and the second limiting structure; this facilitates the movable engagement of the elastic element at any position in the circumferential direction of the locking member with the first limiting structure and the second limiting structure, making operation more convenient.

[0030] Preferably, the first limiting structure and the second limiting structure are circumferentially spaced on the inner sidewall of the mounting hole, and the first limiting structure and the second limiting structure are respectively configured to cooperate with different elastic elements. On the one hand, the circumferentially spaced first limiting structure and second limiting structure are easy to process and avoid interference between the two during processing. On the other hand, it also avoids the elastic element from frequently deforming due to interaction with the first limiting structure and the second limiting structure, thereby reducing the material fatigue and structural strength of the elastic element.

[0031] Preferably, the wheel body has a downwardly extending skirt; the second limiting structure includes a first blocking wall and a groove structure extending axially from the first blocking wall to the bottom end of the mounting hole, the sidewall of the groove structure being vertical or gradually moving upward toward the central axis of the handwheel, and in the orthographic projection on the horizontal plane, the projection of the inner wall of the groove structure does not coincide with the projection of the skirt; and / or, in the orthographic projection on the horizontal plane, the projection of the first limiting structure does not coincide with the projection of the skirt.

[0032] Based on the above structure, the first limiting structure and the second limiting structure are completely offset in the circumferential direction, and the second limiting structure has no protruding structure from the first blocking wall to the bottom of the mounting hole. The groove structure is also unobstructed along the axial direction to the skirt, which facilitates the injection molding of the first limiting structure, the second limiting structure and the wheel body together, simplifies the processing technology and reduces costs.

[0033] Preferably, the skirt is provided with a guide groove that extends axially along the main shaft. The connecting part and the actuating part can be inserted into the guide groove and move along the guide groove to restrict the rotation of the locking member, ensuring that the locking member can only move axially, thus preventing the locking member from rotating itself and thus avoiding the situation where it cannot cooperate with the locking part.

[0034] Preferably, the actuating part is provided with a first locking hole, and the skirt part is provided with a second locking hole. When the locking member is in the first state, the first locking hole and the second locking hole are aligned. The locking member is locked by the lock engaging with the first and second locking holes, thereby further restricting the movement of the locking member and keeping it in the first state to prevent the handwheel from failing due to movement caused by external force. In addition, it can also prevent unauthorized personnel from operating the valve body at will.

[0035] Preferably, the skirt is provided with a guide groove; wherein, at the connection between the skirt and the bottom wall of the mounting hole, the angle between the tangent of the skirt at the connection and the tangent of the mounting hole at the connection is an acute angle; and / or, the inner wall of the mounting hole extends downward to form an extension, the extension is fixedly connected to the skirt, and the fixed connection is located on both sides of the guide groove.

[0036] A portion of the skirt is located axially below the mounting hole and has a connection with the bottom wall of the mounting hole. The tangent of the mounting hole at the connection indicates the direction of force transmission at the connection when the mounting hole is subjected to force, and the tangent of the skirt at the connection indicates the direction of force transmission when the force is transmitted to the skirt. Setting the two tangents at an acute angle helps to improve the local rigidity of the skirt, thereby increasing the stability of the entire structure when subjected to axial compressive force.

[0037] The extension portion placed inside the skirt further optimizes the support of the skirt, improves the structural strength of the skirt, and prevents the locking part from coming into contact with the locking part due to human operation when the handwheel is locked, thus preventing the force from being transmitted to the skirt and causing the skirt to deform easily.

[0038] Preferably, the mounting hole includes a first part and a second part distributed axially, the inner diameter of the first part is larger than the inner diameter of the second part, and the pressing part is circumferentially limited to the first part;

[0039] The top of the second part has a guide slope, and when the locking member is inserted into the mounting hole from top to bottom, the elastic member is deformed inward by the action of the guide slope.

[0040] The first part of the mounting hole provides axial movement space for the pressing part of the locking member, and also acts as a circumferential limit for the pressing part to prevent the locking member from shifting relative to the mounting hole. A second part with an inner diameter smaller than the first part is provided. The top of the second part can withstand the downward pressing force of the locking member, while limiting the downward axial movement space of the locking member to prevent the locking member from directly passing through the mounting hole and disengaging. Another function of the second part is to cooperate with the elastic member to fix the position of the locking member in the mounting hole. The first limiting structure and the second limiting structure can be set on the second part. Since the inner diameter of the second part is smaller than that of the first part, when the locking member is inserted into the mounting hole from top to bottom, the elastic member is deformed inward by the guiding slope, so that the elastic member can smoothly enter the second part, thereby facilitating the installation of the locking member.

[0041] Preferably, the top of the actuating part is provided with an abutment wall, and when the locking member is at its highest position in the axial direction, the abutment wall abuts against the outer peripheral bottom surface of the mounting hole. The function of the abutment wall is to disperse the impact force on the mounting hole or wheel body when the locking member moves upward, reduce the force between the elastic member and the second limiting structure, and prevent the elastic member from being damaged due to excessive force.

[0042] Preferably, the wheel body is provided with a radial limiting wall, and the side wall of the actuating part near the central axis of the wheel body can abut against the radial limiting wall and be restricted from moving radially inward, so that the locking part remains axially vertical, the axial movement of the locking part in the mounting hole is smoother, and the correspondence with the locking part is more accurate. This avoids the actuating part in the locking part from deflecting inward when the locking part is pushed upward, which could lead to easy deformation of the elastic element in the locking part and easy disengagement of the locking part from the mounting hole.

[0043] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0044] The manual valve of this utility model restricts the rotation of the handwheel by cooperating with the locking part on the valve body. Based on the position of the locking part, the locking part and the mounting hole on the handwheel are axially movable, that is, the locking part can move axially relative to the mounting hole, and the movement method is simpler. In addition, the inner wall of the mounting hole of this utility model is circumferentially closed, that is, the mounting hole does not have an open notch, which avoids sharp edges from scratching the fingers of personnel or tearing the gloves of personnel. Attached Figure Description

[0045] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a three-dimensional structural diagram of Embodiment 1 of the present utility model;

[0047] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present utility model;

[0048] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0049] Figure 4 This is a schematic diagram of the wheel body in Embodiment 1 of this utility model;

[0050] Figure 5 This is a partial cross-sectional schematic diagram of the wheel body in Embodiment 1 of this utility model;

[0051] Figure 6 This is a cross-sectional schematic diagram of the wheel body in Embodiment 1 of this utility model;

[0052] Figure 7 This is a schematic diagram of the locking component in Embodiment 1 of this utility model;

[0053] Figure 8 This is a cross-sectional schematic diagram of the first limiting structure in Embodiment 1 of this utility model;

[0054] Figure 9 This is a partial cross-sectional schematic diagram of the wheel body in Embodiment 2 of this utility model;

[0055] Figure 10 This is a schematic diagram of the bottom structure of the wheel body in Embodiment 2 of this utility model, where the dashed lines represent the tangents of the mounting holes at the connection and the tangents of the skirt at the connection, respectively.

[0056] Figure 11 This is a three-dimensional structural diagram of the bottom of the wheel body from another angle in Embodiment 2 of this utility model.

[0057] Explanation of reference numerals in the attached figures

[0058] 10. Valve body; 11. Locking part; 12. Fluid passage;

[0059] 20. Wheel body; 21. Mounting hole; 211. Connection; 212. Extension; 213. First part; 214. Second part; 215. Guide slope; 22. First limiting structure; 221. First inclined wall; 222. Second inclined wall; 23. Second limiting structure; 231. First blocking wall; 232. Groove structure; 24. Skirt; 241. Guide groove; 242. Second locking hole; 25. Radial limiting wall;

[0060] 30. Locking element; 31. Pressing part; 32. Connecting part; 33. Actuating part; 331. First locking hole; 332. Abutting wall; 34. Elastic element; 341. Axial extension part; 342. Protrusion;

[0061] 40. Operating components; 41. Spindle; 42. Diaphragm. Detailed Implementation

[0062] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0063] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0064] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Example 1

[0065] like Figures 1 to 8As shown, the manual valve of this utility model embodiment includes a valve body 10 and an operating component 40. The valve body 10 has a fluid channel 12 for fluid to pass through. The operating component 40 includes a main shaft 41, a diaphragm 42 connected to the main shaft 41, and a handwheel rotatably connected to the valve body 10. The handwheel is used to drive the main shaft 41 to rotate, and the main shaft 41 drives the diaphragm 42 to change the state of the fluid in the fluid channel 12 by rotating. The manual valve can be an on / off valve or a regulating valve, etc.

[0066] like Figure 1 As shown, the valve body 10 has several circumferentially distributed locking portions 11 on the end face facing the handwheel. The locking portions 11 can be protrusions or grooves. The handwheel includes a wheel body 20, a mounting hole 21, and a locking member 30. The mounting hole 21 passes through the wheel body 20 along the axial direction of the main shaft, and its inner wall is circumferentially closed. The locking member 30 is axially movably connected to the mounting hole 21 and has a first state of cooperating with the locking portion 11 to restrict the rotation of the handwheel and a second state of being separated from the locking portion 11. The locking member 30 can be inserted into the groove or inserted between two protrusions. In this embodiment, the locking member 30 is axially moved in and axially moved out to cooperate with the locking portion 11.

[0067] Furthermore, the mounting hole 21 is designed as a circumferentially closed structure, meaning that there are no open notches around the circumference of the mounting hole 21. The locking member 30 moves axially within the mounting hole 21, and the operator's hand or glove will only come into contact with the closed inner wall of the mounting hole 21 at most, without coming into contact with or being scratched by the sharp edges of the open notches, thus ensuring the safety of the operator. At the same time, the circumferentially closed inner wall can play a circumferential limiting role for the locking member 30, ensuring the smooth axial movement of the locking member 30 and accurate docking with the locking part 11, making actual operation more convenient.

[0068] like Figure 7 As shown, the locking member 30 includes a pressing part 31, a connecting part 32 connected to the bottom end of the pressing part 31, and a toggle part 33 connected to the bottom end of the connecting part 32. The pressing part 31 is axially movable with the mounting hole 21, and the toggle part 33 is located below the mounting hole 21 and is locked by cooperating with the locking part 11 through the bottom of the toggle part 33.

[0069] Specifically, refer to Figure 3 At this time, the locking member 30 is in the second state. When it is necessary to lock the handwheel, press the pressing part 31 from top to bottom so that the locking member 30 can move to the first state. At this time, the handwheel is locked by the cooperation of the toggle part 33 and the locking part 11. When it is necessary to turn the handwheel, the locking member 30 is moved upward by the toggle part 33 so that the toggle part 33 is disengaged from the locking part 11, so that the locking member 30 is in the second state, and the handwheel can be turned.

[0070] It should be noted that, referring to Figure 3 When the pressing part 31 is pressed, it moves downward relative to the mounting hole 21. Even if the edge of the glove is close to the area between the side wall of the pressing part 31 and the mounting hole 21, the glove will not get stuck between the side wall of the pressing part 31 and the inner wall of the mounting hole 21. This prevents the glove from getting caught in the relative movement between the locking member 30 and the mounting hole 21 during operation, thus avoiding damage to the glove. Based on the above analysis, it can be seen that when the locking member 30 moves upward, the glove is prone to getting stuck between the side of the pressing part 31 and the inner wall of the mounting hole 21. However, by moving the actuating part 33 located below the mounting hole 21, the locking member 30 moves upward as a whole. This prevents the glove from getting caught or trapped in the area where the locking member 30 and the mounting hole 21 move relative to each other, thus avoiding damage to the glove.

[0071] It should be noted that the descriptions of top and bottom, above and below, and other positions involving up and down in this article are all based on the principle of "top" and "bottom". Figure 2 As a standard, that is, according to Figure 2 The upper middle side is the top. Figure 2 The lower middle side is considered the bottom. However, in actual valve use, it is not limited to this. Figure 2 The valve body can be positioned horizontally, upside down, or tilted, depending on the orientation shown.

[0072] To keep the locking member 30 in the first and second states, a first limiting structure 22 is provided in the mounting hole 21. The locking member 30 includes an elastic member 34, which is located in the mounting hole 21. As the locking member 30 moves axially in the mounting hole 21, it can abut against the first limiting structure 22, thereby preventing the locking member 30 from changing arbitrarily between the first and second states. That is, the locking member 30 will not switch arbitrarily between the first and second states under its own weight or valve body vibration. Only when needed by personnel, a certain force is applied to the locking member 30 to deform the elastic member 34, thereby enabling the elastic member 34 to overcome the limiting effect of the first limiting structure 22 and switch between the first and second states.

[0073] Specifically, refer to Figure 5 as well as Figure 6 The first limiting structure 22 includes a first inclined wall 221 and a second inclined wall 222 arranged vertically along the axis of the main shaft. The first inclined wall 221 is inclined downward in the axial direction, and the second inclined wall 222 is inclined upward in the axial direction.

[0074] When the first inclined wall 221 abuts against the elastic element 34, the locking element 30 is in the second state. This ensures that when no operation is performed, the abutment between the first inclined wall 221 and the elastic element 34 limits the locking element 30, preventing it from switching directly to the first state due to its own weight or valve body vibration. Similarly, when the second inclined wall 222 abuts against the elastic element 34, the locking element 30 is in the first state. This also ensures that when no operation is performed, the abutment between the first inclined wall 221 and the elastic element 34 limits the locking element 30, preventing it from abnormally switching to the second state when no operation is performed.

[0075] When operated by personnel, the elastic element 34 can be deformed by the action of the first inclined wall 221 or the second inclined wall 222, and move to the second inclined wall 222 or the first inclined wall 221.

[0076] Of course, in the foregoing description, when the elastic member 34 is located on the upper side of the first inclined wall 221 and does not abut against the first inclined wall 221, the locking member 30 is still in the second state separated from the locking part 11. That is, the second state of the locking member 30 is not limited to the state where the elastic member 34 abuts against the first inclined wall 221. When the elastic member 34 abuts against the first inclined wall 221, it is the lower limit position of the locking member 30 in the second state. Similarly, when the elastic member 34 is located on the lower side of the second inclined wall 222 and does not abut against the second inclined wall 222, the locking member 30 is still in the first state locked with the locking part 11. That is, the first state of the locking member 30 is not limited to the state where the elastic member 34 abuts against the first inclined wall 221. When the elastic member 34 abuts against the second inclined wall 222, it is the upper limit position of the locking member 30 in the first state.

[0077] Both the first inclined wall 221 and the second inclined wall 222 can be inclined surfaces or inclined arc surfaces, preferably inclined surfaces. The inclined surfaces guide the elastic element 34, making it easier for the elastic element 34 to deform when the locking element 30 is moved by the operator, thus switching the state of the locking element 30. Furthermore, the cooperation between the elastic element 34 and the first and second inclined walls 221 and 222 improves the operator's feel, allowing them to perceive whether the locking element 30 is switching between a first and a second state.

[0078] Since the operator can better apply force when pressing the pressing part 31, while the toggle part 33 is not as easy to apply force, it is preferable to set the second inclined wall 222 to be more inclined than the first inclined wall 221. Figure 8As shown, the angle between the first inclined wall 221 and the axis of the mounting hole 21 is A1, and the angle between the second inclined wall 222 and the axis of the mounting hole 21 is A2, satisfying A1 > A2. This allows the elastic element 34 to move more easily and with less effort when moving upwards along the second inclined wall 222 compared to moving downwards along the first inclined wall 221. This is because when the elastic element 34 abuts against the inclined surface, the more inclined the inclined surface (relative to the horizontal plane), the smaller the component of the contact force perpendicular to the inclined surface and the larger the component parallel to the inclined surface. In other words, the elastic element 34 can move more easily along the inclined surface.

[0079] It needs to be clarified that the angle between the inclined plane and the straight line is: take any point on the straight line and draw a perpendicular line to the plane. Connect the foot of the perpendicular and the foot of the inclined plane to obtain the projection. Calculate the angle between the straight line and the plane in the projected right triangle, which is also the angle between the inclined plane and the straight line.

[0080] like Figure 7 As shown, multiple elastic elements 34 are provided, and the multiple elastic elements 34 are arranged around the outside of the connecting part 32; so that the locking member 30 can be uniformly stressed in the circumference during axial movement, and the axial movement of the locking member 30 is more stable; among the multiple elastic elements 34, all elastic elements 34 can simultaneously abut against the first limiting structure 22, or some elastic elements 34 can abut against the first limiting structure 22. When some elastic elements 34 abut against the first limiting structure 22, it is preferable that the axisymmetric elastic elements 34 abut against the first limiting structure 22, so that the locking member 30 is subjected to balanced forces.

[0081] The elastic member 34 includes an axially extending portion 341 fixed to the bottom end of the pressing portion 31, and a protruding portion 342 protruding radially outward from the bottom end of the axially extending portion 341. The protruding portion 342 can abut against the first inclined wall 221 or the second inclined wall 222 to limit the locking member 30. During the axial movement of the locking member 30, the protruding portion 342 is acted upon by the first inclined wall 221 or the second inclined wall 222, causing the axially extending portion 341 to deform radially, so that the elastic member 34 can switch between the first inclined wall 221 and the second inclined wall 222. For example, when the protruding portion 342 moves downward along the first inclined wall 221, the axially extending portion 341 will deform radially; when the protruding portion 342 moves to the second inclined wall 222 and continues to move downward, the axially extending portion 341 will elastically return to its original position; and vice versa.

[0082] Of course, in other embodiments, the elastic element 34 can also be other elastic structures that can deform and reset, such as elastic metal sheets, rubber sheets, rubber rings, etc.

[0083] The mounting hole 21 can be a circular hole, a square hole, or a hole of other shapes. The distribution and shape of the elastic element 34 are adapted to the shape of the mounting hole 21. In a specific embodiment, the mounting hole 21 is a circular hole, and the axial extension 341 and the protrusion 342 are both arc-shaped structures to adapt to the first limiting structure 22 on the inner wall of the mounting hole 21.

[0084] Reference Figure 5 as well as Figure 6 A second limiting structure 23 is also provided in the mounting hole 21. The second limiting structure 23 is used to engage with the elastic member 34 to limit the highest position of the locking member 30 in the second state, so as to prevent the locking member 30 from completely disengaging from the mounting hole 21 when it moves from bottom to top. It also limits the elastic member 34 of the locking member 30 to ensure that the locking member 30 can always move axially in the mounting hole 21.

[0085] In this embodiment, reference is made to Figure 5 as well as Figure 6 The first limiting structure 22 and the second limiting structure 23 are circumferentially spaced on the inner wall of the mounting hole 21. The first limiting structure 22 and the second limiting structure 23 are respectively configured to cooperate with different elastic elements 34. On the one hand, the circumferentially spaced first limiting structure 22 and the second limiting structure 23 facilitate processing and avoid interference during processing; on the other hand, it also avoids frequent deformation of the elastic element 34 due to interaction with the first limiting structure 22 and the second limiting structure 23, reducing material fatigue and structural strength of the elastic element 34. Based on the above embodiment, the axial lengths of the different elastic elements 34 corresponding to the first limiting structure 22 and the second limiting structure 23 can be the same or different. If the axial lengths of the elastic elements 34 are the same, then the axial height of the first limiting structure 22 is lower than the axial height of the second limiting structure 23, that is, as shown... Figure 6 As shown; if the axial lengths of the elastic elements 34 are different, the axial heights of the first limiting structure 22 and the second limiting structure 23 are adapted to the corresponding elastic elements 34, and are set according to the actual situation.

[0086] like Figure 5As shown, the wheel body 20 has a downwardly extending skirt 24; the second limiting structure 23 includes a first blocking wall 231 and a groove structure 232 extending axially from the first blocking wall 231 to the bottom end of the mounting hole 21. The sidewall of the groove structure 232 is vertical or gradually moves upward toward the central axis of the handwheel. In the orthographic projection on the horizontal plane, the projection of the inner wall of the groove structure 232 does not coincide with the projection of the skirt 24, that is, the second limiting structure 23 has no protruding structure from the first blocking wall 231 to the bottom end of the mounting hole 21, and the groove structure 232 also extends axially to the skirt 24. Unobstructed; in the orthographic projection on the horizontal plane, the projection of the first limiting structure 22 does not coincide with the projection of the skirt 24, there is no protruding structure in the area from the first limiting structure 22 to the bottom of the mounting hole 21, and there is no obstruction along the axial direction of the first limiting structure 22 to the skirt 24; it is convenient for the first limiting structure 22, the second limiting structure 23 and the wheel body 20 to be injection molded together, avoiding the first limiting structure 22 and the second limiting structure 23 from being unable to be injection molded due to the interference of the skirt 24, which would lead to the need for additional processing, making the actual processing inconvenient and inefficient.

[0087] like Figure 4 as well as Figure 5 As shown, the skirt 24 is provided with a guide groove 241, which extends axially along the main shaft. The connecting part 32 and the actuating part 33 can be inserted into the guide groove 241 and move along the guide groove 241 to restrict the rotation of the locking member 30. This ensures that the locking member 30 can only move axially and is always aligned with the locking part 11, thus preventing the locking member 30 from misaligning with the locking part 11 and causing the handwheel to fail to lock.

[0088] Preferred, such as Figure 6 as well as Figure 7 As shown, the actuating part 33 is provided with a first locking hole 331, and the skirt part 24 is provided with a second locking hole 242. When the locking member 30 is in the first state, the first locking hole 331 and the second locking hole 242 are aligned. The lock engages with the first locking hole 331 and the second locking hole 242 to lock the locking member 30, thereby further restricting the movement of the locking member 30 and keeping it in the first state. This prevents the handwheel from failing due to external force or unauthorized personnel from arbitrarily operating the valve body and changing its state.

[0089] like Figure 5 as well as Figure 6As shown, the mounting hole 21 includes a first part 213 and a second part 214 distributed axially. The inner diameter of the first part 213 is larger than the inner diameter of the second part 214, and the pressing part 31 is circumferentially limited to the first part 213. The first part 213 of the mounting hole 21 provides axial movement space for the pressing part 31 of the locking member 30, and at the same time, it plays a circumferential limiting role for the pressing part 31 to prevent the locking member 30 from shifting relative to the mounting hole 21. The second part 214 is provided with an inner diameter smaller than that of the first part 213. The top of the second part 214 can withstand the downward pressing force of the locking member 30, and at the same time, it restricts the axial movement space of the locking member 30 to prevent the locking member 30 from directly passing through the mounting hole 21 and disengaging. Another function of the second part 214 is to cooperate with the elastic member 34 to fix the position of the locking member 30 in the mounting hole 21. The first limiting structure 22 and the second limiting structure 23 can be provided on the second part 214.

[0090] Since the inner diameter of the second part 214 is smaller than that of the first part 213, and the top of the second part 214 has a guide slope 215, when the locking member 30 is inserted into the mounting hole 21 from top to bottom, the elastic member 34 is deformed inward by the action of the guide slope 215, so that the elastic member 34 can smoothly enter the second part 214 and avoid excessive deformation of the elastic member 34 and damage.

[0091] like Figure 6 and Figure 7 As shown, the top of the actuating part 33 is provided with an abutment wall 332. When the locking member 30 is at its highest position in the axial direction, the abutment wall 332 abuts against the outer peripheral bottom surface of the mounting hole 21. The function of the abutment wall 332 is to disperse the impact force on the mounting hole 21 or the wheel 20 when the locking member 30 moves upward, reduce the force between the elastic member 34 and the second limiting structure 23, and prevent the elastic member 34 from being damaged due to excessive force. Preferably, the abutment wall 332 is a plane.

[0092] like Figure 3 as well as Figure 6 As shown, a radial limiting wall 25 is provided on the wheel body 20. The side wall of the actuating part 33 near the central axis of the wheel body 20 can abut against the radial limiting wall 25 and be restricted from moving radially inward, so that the locking part 30 remains axially vertical. The locking part 30 moves more smoothly in the mounting hole 21, and avoids the locking part 30 from being deflected inward by the actuating part 33 when it is actuated, which would cause the locking part 30 to be deflected inward as a whole, resulting in the elastic element 34 and other structures in the locking part 30 being easily damaged or the elastic element 34 disengaging from the second limiting structure 23. Example 2

[0093] The difference from Example 1 is that:

[0094] like Figure 9As shown, both the first limiting structure 22 and the second limiting structure 23 are circumferentially extending annular structures, with the second limiting structure 23 located above the first limiting structure 22. This allows the protrusion 342 to be confined between the first limiting structure 22 and the second limiting structure 23, and the locking member 30 remains in the second state between the first limiting structure 22 and the second limiting structure 23. In this embodiment, the second limiting structure 23 also limits the highest position of the locking member 30 in the second state, preventing the locking member 30 from completely disengaging from the mounting hole 21 when moving from bottom to top, thus ensuring that the locking member 30 can always move axially within the mounting hole 21.

[0095] like Figure 9 As shown, the second limiting structure 23 includes a first blocking wall 231 axially spaced from the first limiting structure 22. After the elastic member 34 moves above the first inclined wall 221, it continues to move upward until it abuts against the first blocking wall 231. At this point, the locking member 30 moves to its highest axial position and cannot move further upward. The first blocking wall 231 is preferably horizontally arranged to prevent the bottom wall from guiding the protrusion 342 to continue moving upward and causing the protrusion 342 to cross the second limiting structure 23.

[0096] In this embodiment, both the first limiting structure 22 and the second limiting structure 23 can be machined.

[0097] like Figure 10 As shown, a portion of the skirt 24 is located axially below the mounting hole 21 and has a connection 211 with the bottom wall of the mounting hole 21. The angle B between the tangent of the skirt 24 at the connection 211 and the tangent of the mounting hole 21 at the connection 211 is an acute angle. Specifically, the tangent of the mounting hole 21 at the connection 211 indicates the direction of force transmission at the connection 211 when the mounting hole 21 is subjected to force, and the tangent of the skirt 24 at the connection 211 indicates the direction of force transmission when the force is transmitted to the skirt 24. Setting the two tangents as an acute angle helps to improve the local rigidity of the skirt 24, thereby increasing the stability of the entire structure when subjected to axial pressing force. In particular, for the eccentric torque of the locking member on the mounting hole 21 and the skirt 24, it can more effectively disperse the pressing force and avoid stress concentration.

[0098] like Figure 11 As shown, the inner wall of the mounting hole 21 extends downward to form an extension 212. The extension 212 is located inside the skirt 24 and is fixedly connected to the skirt 24, further optimizing the support for the skirt 24 and improving the structural strength of the skirt 24. Of course, the setting of the extension 212 and the acute angle B of the chamfer in this embodiment is also applicable to the scheme of Embodiment 1.

[0099] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A manual valve, comprising, The valve body has a fluid passage for fluid to pass through; The operating components include a main shaft, a diaphragm connected to the main shaft, and a handwheel rotatably connected to the valve body. The handwheel is used to drive the main shaft to rotate, and the main shaft drives the diaphragm to change the state of the fluid in the fluid channel by rotating. Its features are: The valve body has several circumferentially distributed locking parts on the end face facing the handwheel. The handwheel includes a wheel body, a mounting hole, and a locking element. The inner wall of the mounting hole is circumferentially closed and extends through the wheel body along the axial direction of the main shaft. The locking member is axially movably connected to the mounting hole and has a first state in which it cooperates with the locking part to restrict the rotation of the handwheel and a second state in which it is separated from the locking part.

2. The manual valve as described in claim 1, characterized in that, The locking member includes a pressing part, a connecting part connected to the bottom end of the pressing part, and a toggle part connected to the bottom end of the connecting part. The pressing part is axially movable with the mounting hole, and the toggle part is located below the mounting hole. By pressing the pressing part, the locking member can move to the first state; By moving the actuating part, the locking member can move to the second state.

3. The manual valve as described in claim 2, characterized in that, The mounting hole is provided with a first limiting structure, which includes a first inclined wall and a second inclined wall arranged vertically along the axial direction of the main shaft. The first inclined wall is inclined downward in the axial direction, and the second inclined wall is inclined upward in the axial direction. The locking element further includes an elastic element, which is located in the mounting hole; When the locking member moves along the mounting hole, the elastic member can be deformed by the action of the first inclined wall or the second inclined wall, and move to the second inclined wall or the first inclined wall. When the elastic member abuts against the first inclined wall, the locking member is in the second state; when the elastic member abuts against the second inclined wall, the locking member is in the first state.

4. The manual valve as described in claim 3, characterized in that, The angle between the first inclined wall and the axis of the mounting hole is A1, and the angle between the second inclined wall and the axis of the mounting hole is A2, satisfying A1 > A2.

5. The manual valve as described in claim 3, characterized in that, Multiple elastic elements are provided, and the multiple elastic elements are arranged around the outside of the connecting part; The elastic element includes an axially extended portion fixed to the bottom end of the pressing portion, and a protruding portion that protrudes radially outward from the bottom end of the axially extended portion. The protruding portion can abut against the first inclined wall or the second inclined wall.

6. The manual valve as described in claim 5, characterized in that, A second limiting structure is also provided in the mounting hole. The second limiting structure is used to engage with the elastic member to limit the highest position of the locking member in the second state.

7. The manual valve as described in claim 6, characterized in that, Both the first limiting structure and the second limiting structure are circumferentially extending ring structures, and the second limiting structure is located on the upper side of the first limiting structure, so that the protrusion can be restricted between the first limiting structure and the second limiting structure.

8. The manual valve as described in claim 6, characterized in that, The first limiting structure and the second limiting structure are circumferentially spaced on the inner sidewall of the mounting hole, and the first limiting structure and the second limiting structure are respectively configured to cooperate with different elastic elements.

9. The manual valve as described in claim 8, characterized in that, The wheel body has a downwardly extending skirt; The second limiting structure includes a first blocking wall and a groove structure extending axially from the first blocking wall to the bottom of the mounting hole. The sidewall of the groove structure is vertical or gradually moves upward toward the central axis of the handwheel. In the orthographic projection on the horizontal plane, the projection of the inner wall of the groove structure does not coincide with the projection of the skirt. And / or, in the orthographic projection onto the horizontal plane, the projection of the first limiting structure does not coincide with the projection of the skirt.

10. The manual valve as described in claim 9, characterized in that, The skirt is provided with a guide groove that extends axially along the main shaft. The connecting part and the actuating part can be inserted into the guide groove and move along the guide groove to restrict the rotation of the locking member; and / or, The actuating part is provided with a first locking hole, and the skirt part is provided with a second locking hole. When the locking member is in the first state, the first locking hole and the second locking hole are aligned. The locking member is locked by the lock cooperating with the first locking hole and the second locking hole.

11. The manual valve as described in claim 10, characterized in that, The skirt is provided with guide grooves; Wherein, at the connection between the skirt and the bottom wall of the mounting hole, the angle between the tangent of the skirt at the connection and the tangent of the mounting hole at the connection is set to be an acute angle; And / or, the inner wall of the mounting hole extends downward to form an extension, the extension is fixedly connected to the skirt, and the fixed connection is located on both sides of the guide groove.

12. The manual valve as described in claim 3, characterized in that, The mounting hole includes a first part and a second part distributed axially, the inner diameter of the first part is larger than the inner diameter of the second part, and the pressing part is circumferentially limited to the first part; The top of the second part has a guide slope, and when the locking member is inserted into the mounting hole from top to bottom, the elastic member is deformed inward by the action of the guide slope.

13. The manual valve as described in claim 3, characterized in that, The top of the actuating part is provided with an abutting wall, and when the locking member is at its highest position in the axial direction, the abutting wall abuts against the outer peripheral bottom surface of the mounting hole.

14. The manual valve as described in claim 2, characterized in that, The wheel body is provided with a radial limiting wall, and the side wall of the actuating part near the central axis of the wheel body can abut against the radial limiting wall and be restricted to move radially inward.

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