Manual valve

Abstract

The utility model discloses a manual valve which comprises a valve shell and a valve assembly. The valve assembly comprises a main shaft, a diaphragm and a hand wheel, the hand wheel drives the main shaft to rotate, and the main shaft rotates to drive the diaphragm to reciprocate in the axial direction to open and close the fluid channel. A tooth part is arranged at the top of the valve shell; the hand wheel comprises a skirt part, and a notch is formed in the skirt part; a locking piece is rotationally connected to the hand wheel, and a limiting convex part is arranged on the side part of the locking piece; wherein the skirt part elastically deforms when the limiting convex part passes through the notch, and resets to keep the locking position after the limiting convex part passes through the notch and is meshed with the tooth part. The locking piece is rotationally connected to the hand wheel, meanwhile, the tooth part is arranged on the valve shell, a user can rotate the locking piece to penetrate through the notch to be meshed with the tooth part, the tooth part can limit the locking piece in the circumferential direction, the situation that the hand wheel is collided or rotates when the user operates mistakenly is avoided, the diaphragm is kept at the set position, and the safety of the valve is improved. Therefore, the fluid channel is kept in a closed state or a state in which the set flow of liquid flows.

Description

Technical Field

[0001] The utility model belongs to the field of valves, and in particular relates to a manual valve. Background Art

[0002] Manual valves are a special type of valve that can open and close fluid channels or adjust the liquid flow rate of the fluid channel in the open state by turning the handwheel to drive the valve assembly to move, thereby driving the movement or deformation of the diaphragm. These valves are widely used in pipelines that transmit high-purity media such as ultrapure water. Currently, the handwheel of manual valves on the market can rotate freely. After the manual valve is closed or adjusted to the required liquid flow rate, the handwheel of the manual valve can easily rotate due to collision, misoperation, or valve movement, causing the manual valve to fail to remain closed or maintain the required liquid flow rate. This can cause the fluid flow rate in the fluid channel to be too fast or too slow, and can also lead to poor safety when transmitting corrosive liquids. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a manual valve to solve the problem of free rotation of the hand wheel.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions: a manual valve, comprising a valve housing, which has a fluid channel for fluid to pass through; a valve assembly, comprising a main shaft, a diaphragm connected to the main shaft, and a handwheel rotatably connected to the top of the valve housing, the handwheel meshing with the main shaft to drive the main shaft to rotate, and the main shaft drives the diaphragm to reciprocate axially through rotation to open and close the fluid channel; a tooth portion is provided on the top of the valve housing; the handwheel includes a skirt extending downward, and the skirt is provided with a notch; a locking member that can pass through the notch is rotatably connected to the handwheel, and a limiting protrusion is provided on the side of the locking member; wherein the skirt elastically deforms when the limiting protrusion passes through the notch, and resets to maintain the locked state after the limiting protrusion passes over the notch and meshes with the tooth portion. This technical solution has the following technical effects:

[0005] The utility model provides a locking piece connected to the rotation of the handwheel on the handwheel and a notch on the skirt of the handwheel, and at the same time provides a toothed portion on the valve housing, so that if the user needs to turn the handwheel to close the fluid channel or open the fluid channel and adjust the liquid flow in the fluid channel, the locking piece can be rotated to an unlocked position disengaged from the toothed portion. At this time, the user can arbitrarily turn the handwheel to drive the main shaft to rotate together. The main shaft converts the rotation into axial movement to drive the diaphragm to reciprocate along the axial direction, thereby opening and closing the fluid channel or controlling the liquid flow in the fluid channel through the diaphragm. If When the user has finished turning the handwheel and no longer needs to turn it, the locking piece can be rotated so that the locking piece passes through the notch in the skirt and reaches the inner side of the skirt and engages with the teeth on the top of the valve housing. At this time, the locking piece is in the locked position, and the teeth can limit the locking piece in the circumferential direction, so that the handwheel cannot drive the locking piece to rotate around the central axis of the handwheel, thereby preventing the handwheel from being hit or rotating due to user error. The diaphragm is kept in the set position to keep the fluid channel closed or allow the set flow of liquid to flow. The operation is stable and reliable, and it is safer when transmitting corrosive liquids. By providing a limiting protrusion on the side of the locking member, when the locking member switches between the locked position and the unlocked position, when the limiting protrusion on the locking member passes through the notch, the skirt is elastically deformed under the push of the limiting protrusion, so that the notch is expanded from the initial width to the width for the limiting protrusion to pass through. After the limiting protrusion passes over the notch, the notch is reset to the initial width. In the absence of external force, the limiting protrusion can no longer pass through the notch, so as to limit the limiting protrusion by the notch and realize the limitation of the locking member, so that the locking member is maintained in the locked position or the unlocked position, so as to avoid the locking member from freely disengaging from the tooth portion and being unable to limit the rotation of the hand wheel, and also avoid the locking member from freely switching from the unlocked position to the locked position and affecting the user's rotation of the hand wheel, thereby improving the user experience.

[0006] In the aforementioned manual valve, the handwheel further includes a reinforcement portion connected to the sidewall of the skirt. This enhances the strength of the skirt. After the limiting protrusion on the locking member passes through the notch to engage the locking member with the teeth, the skirt is less likely to deform. Even if a user accidentally touches the locking member, the locking member will not disengage from the engagement with the teeth, thereby preventing user misoperation. Because the notch somewhat reduces the strength of the skirt, the reinforcement portion connected to the skirt also provides support for the skirt, preventing damage due to excessive torsional deformation when the handwheel is turned.

[0007] In the aforementioned manual valve, the handwheel further includes an inner cylinder portion, which is disposed around and meshes with the main shaft, a skirt portion surrounding the outer circumference of the inner cylinder portion, and a reinforcement portion connected between the inner cylinder portion and the skirt portion. The reinforcement portion has two ends connected to the inner sidewall of the skirt portion and the outer sidewall of the inner cylinder portion, respectively, to strengthen both the skirt portion and the inner cylinder portion. When the user rotates the handwheel, the handwheel drives the entire inner cylinder portion through the reinforcement portion, preventing twisting caused by asynchronous rotation of the upper and lower ends of the inner cylinder portion, thereby improving transmission efficiency.

[0008] In the manual valve described above, the inner cylinder includes a first arcuate segment proximal to the notch and a second arcuate segment distal to the notch, a separation gap being provided between the end of the first arcuate segment and the end of the second arcuate segment, and the reinforcing portion includes a first reinforcing rib connected between the inner sidewall of the skirt portion on the side of the notch and the first arcuate segment. The provision of the separation gap allows the first arcuate segment to deform to a certain extent. When the limiting protrusion on the locking member passes through the notch, the skirt elastically deforms, causing the first reinforcing rib to deform along with the skirt, and further causing the first arcuate segment to deform, thereby reducing the difficulty of the limiting protrusion of the locking member passing through the notch. This makes it easier for a user to rotate the locking member to switch the locking member between a locked position and an unlocked position with less effort, thus facilitating user operation.

[0009] In the aforementioned manual valve, the reinforcement portion further includes a second reinforcement rib connected between the second arcuate segment and the inner sidewall of the skirt. The second reinforcement rib connected between the second arcuate segment and the inner sidewall of the skirt enhances the strength of the second arcuate segment and drives the second arcuate segment to rotate when the user turns the handwheel, thereby improving transmission efficiency.

[0010] In the manual valve described above, the handwheel further includes a limiter, wherein the outer wall of the skirt is provided with limiter protrusions located on either side of the recess, and when the locking member is in the locked position, the limiter extends horizontally through the two limiter protrusions to prevent the locking member from rotating toward the unlocked position. Alternatively, the handwheel further includes a limiter, wherein the outer wall of the skirt is provided with a limiter protrusion located on one side of the recess, and both the limiter protrusion and the locking member are provided with limiter holes, and the limiter extends horizontally through the two limiter holes to prevent the locking member from rotating. The limiter protrusions can prevent the locking member from rotating from the locked position to the unlocked position, thereby limiting the locking member and preventing the locking member from freely disengaging from the locked position. This prevents a user from colliding with and rotating the handwheel or from erroneously operating the handwheel, thereby ensuring the stable position of the diaphragm and thereby ensuring stable closure of the manual valve or control of the flow rate.

[0011] In the aforementioned manual valve, the handwheel further includes an operating portion, which is provided with a mounting groove extending longitudinally through the operating portion, the upper end of the locking member being rotatably connected within the mounting groove, and the top width of the mounting groove being A, which satisfies 8mm≤A≤16mm. By setting the width of the mounting groove to be no greater than 16mm, which is less than the width of a finger, the user's fingertip cannot be inserted into the mounting groove to press the locking member when the fingertip is facing downward, thereby preventing the user's finger from accidentally touching the locking member and causing the locking member to rotate to the locked position when the handwheel is rotated. By setting the width of the mounting groove to be no less than 8mm, which is no less than the thickness of a finger, the user can turn the finger sideways when it needs to rotate the locking member to the locked position and insert the side of the finger into the mounting groove to press the locking member to the locked position, which facilitates operation and prevents the user from accidentally touching the locking member when rotating the handwheel.

[0012] In the aforementioned manual valve, a stopper is provided on the locking member. When the top of the stopper abuts the bottom of the operating portion, the locking member is in the unlocked position. During the process of rotating the locking member from the locked position to the unlocked position, when the stopper abuts the bottom of the operating portion, the locking member stops rotating. At this point, the locking member is in the unlocked position. The stopper abuts the operating portion via the stopper, prompting the user to fully rotate the locking member, preventing over-rotation of the locking member and improving the user experience.

[0013] In the aforementioned manual valve, a rotating shaft extends horizontally between two opposing inner walls of the mounting groove. The locking member is provided with a pivot hole having an opening whose width is smaller than the inner diameter of the pivot hole. The rotating shaft engages the pivot hole through the opening, thereby enabling the locking member to be rotatably connected to the rotating shaft. During installation, the rotating shaft elastically deforms through the opening and engages the pivot hole, allowing relative rotation between the locking member and the rotating shaft. Because the width of the opening is smaller than the inner diameter of the pivot hole, the locking member and the rotating shaft are effectively prevented from freely disengaging. This engaging connection allows the user to replace the locking member if it is damaged, reducing repair and replacement costs.

[0014] In the manual valve described above, the tooth portion includes a plurality of limiting teeth arranged around the main shaft, the plurality of limiting teeth being spaced apart on the inner side of the skirt to form a stop gap between adjacent limiting teeth, and the locking member being inserted into the stop gap to engage with the limiting teeth. The valve housing includes a valve body having a fluid passage, an upper housing mounted on the valve body, and an upper cover, the upper cover being threadedly connected to the valve body and abutting against the top of the upper housing so that the upper housing and the valve body can jointly clamp the circumference of the diaphragm, and the limiting teeth being provided on the top of the upper housing or the top of the upper cover. The main shaft includes a shaft body and a sleeve, the sleeve being threadedly connected to the outer side of the shaft body, the diaphragm being mounted on the bottom of the shaft body, and the handwheel being engaged with the outer side of the sleeve to drive the sleeve to rotate, thereby driving the shaft body to move axially. The arrangement of the plurality of limiting teeth around the main shaft allows the user to stop the handwheel by rotating the locking member to align with any of the stop gaps, thereby locking the handwheel by inserting the locking member into the corresponding stop gap, thus making operation convenient and simple.

[0015] The features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0017] Figure 1 is a three-dimensional diagram of the manual valve in Example 1;

[0018] Figure 2 This is an assembly diagram of the hand wheel and the locking member when the locking member and the tooth portion are disengaged in Example 1;

[0019] Figure 3 is a cross-sectional view of the manual valve in Example 1;

[0020] Figure 4 It is a partial schematic diagram of the manual valve when the locking member and the tooth portion are engaged in the first embodiment;

[0021] Figure 5 It is a partial exploded view of the manual valve in Example 1;

[0022] Figure 6 It is a partial cross-sectional schematic diagram of the manual valve when the locking member and the tooth portion are engaged in the first embodiment;

[0023] Figure 7 It is a partial cross-sectional schematic diagram of the manual valve when the locking member and the tooth portion are disengaged in the first embodiment;

[0024] Figure 8 It is a three-dimensional diagram of the hand wheel in Example 1.

[0025] Reference numerals:

[0026] 100, valve housing; 110, tooth portion; 111, limit tooth; 112, stop gap; 120, valve body; 121, fluid channel; 130, upper housing; 140, upper cover;

[0027] 200, main shaft; 210, shaft body; 220, shaft sleeve;

[0028] 300, diaphragm;

[0029] 400, handwheel; 410, skirt; 411, notch; 412, limiting protrusion; 4121, limiting hole; 420, reinforcement portion; 421, first reinforcing rib; 422, second reinforcing rib; 430, inner cylinder; 431, first arc segment; 432, second arc segment; 433, separation gap; 440, limiting member; 450, operating portion; 451, mounting slot; 452, rotating shaft;

[0030] 500, locking member; 510, limiting protrusion; 520, limiting platform; 530, pivot hole; 531, opening. DETAILED DESCRIPTION

[0031] The utility model proposes a manual valve, comprising: a valve housing, which has a fluid channel for fluid to pass through; a valve assembly, comprising a main shaft, a diaphragm connected to the main shaft and a handwheel rotatably connected to the top of the valve housing, the handwheel meshing with the main shaft to drive the main shaft to rotate, and the main shaft drives the diaphragm to reciprocate axially through rotation to open and close the fluid channel; a tooth portion is provided on the top of the valve housing; the handwheel comprises a skirt extending downward, which is provided with a notch; a locking piece that can pass through the notch is rotatably connected to the handwheel, and a limiting protrusion is provided on the side of the locking piece; wherein the skirt elastically deforms when the limiting protrusion passes through the notch, and resets to maintain the locked position after the limiting protrusion passes over the notch and meshes with the tooth portion. The utility model provides a locking piece connected to the rotation of the handwheel on the handwheel and a notch on the skirt of the handwheel, and at the same time provides a toothed portion on the valve housing, so that if the user needs to turn the handwheel to close the fluid channel or open the fluid channel and adjust the liquid flow in the fluid channel, the locking piece can be rotated to an unlocked position disengaged from the toothed portion. At this time, the user can arbitrarily turn the handwheel to drive the main shaft to rotate together. The main shaft converts the rotation into axial movement to drive the diaphragm to reciprocate along the axial direction, thereby opening and closing the fluid channel or controlling the liquid flow in the fluid channel through the diaphragm. If When the user has finished turning the handwheel and no longer needs to turn it, the locking piece can be rotated so that the locking piece passes through the notch in the skirt and reaches the inner side of the skirt and engages with the teeth on the top of the valve housing. At this time, the locking piece is in the locked position, and the teeth can limit the locking piece in the circumferential direction, so that the handwheel cannot drive the locking piece to rotate around the central axis of the handwheel, thereby preventing the handwheel from being hit or rotating due to user error. The diaphragm is kept in the set position to keep the fluid channel closed or allow the set flow of liquid to flow. The operation is stable and reliable, and it is safer when transmitting corrosive liquids. By providing a limiting protrusion on the side of the locking member, when the locking member switches between the locked position and the unlocked position, when the limiting protrusion on the locking member passes through the notch, the skirt is elastically deformed under the push of the limiting protrusion, so that the notch is expanded from the initial width to the width for the limiting protrusion to pass through. After the limiting protrusion passes over the notch, the notch is reset to the initial width. In the absence of external force, the limiting protrusion can no longer pass through the notch, so as to limit the limiting protrusion by the notch and realize the limitation of the locking member, so that the locking member is maintained in the locked position or the unlocked position, so as to avoid the locking member from freely disengaging from the tooth portion and being unable to limit the rotation of the hand wheel, and also avoid the locking member from freely switching from the unlocked position to the locked position and affecting the user's rotation of the hand wheel, thereby improving the user experience.

[0032] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0034] 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 specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, unless otherwise specified, "plurality" means two or more, unless expressly limited otherwise.

[0035] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0036] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0037] Example 1:

[0038] A manual valve, such as Figures 1 to 8 As shown, it includes a valve housing 100 and a valve assembly. A fluid channel 121 is provided in the valve housing 100 for fluid to pass through. The valve assembly includes a main shaft 200, a diaphragm 300 and a handwheel 400. The diaphragm 300 is connected to the bottom of the main shaft 200. The handwheel 400 is rotatably connected to the top of the valve housing 100 and engages with the top of the main shaft 200. When the handwheel 400 rotates, it drives the main shaft 200 to rotate together. The main shaft 200 can convert the rotation into axial movement to drive the diaphragm 300 to reciprocate along the axial direction, thereby closing the fluid channel 121 or opening the fluid channel 121 through the diaphragm 300 and controlling the liquid flow in the fluid channel 121. A tooth portion 110 is provided at a position on the top of the valve housing 100 corresponding to the handwheel 400. The handwheel 400 includes a downwardly extending skirt 410. The skirt 410 is provided with a recess 411 with an opening 531 downward. The recess 411 is arranged to pass horizontally through the skirt 410 to connect the inside and outside of the skirt 410. A locking member 500 is rotatably connected to the handwheel 400. The locking member 500 is arranged corresponding to the recess 411. The upper end of the locking member 500 is rotatably connected to the handwheel 400 through a rotating shaft 452. The locking member 500 can be switched between a locked position and an unlocked position by rotation. A limiting protrusion 510 is provided on the side of the locking member 500. When the locking member 500 is in the unlocked position, the bottom of the locking member 500 and the tooth portion 110 are in a disengaged state. At this time, the limiting protrusion 510 on the locking member 500 is on the outside of the skirt 410 to prevent the locking member 500 from being disengaged from the unlocked position. The handwheel 400 can drive the locking member 500 to rotate around the central axis of the handwheel 400; when the user pushes the locking member 500 to rotate so that the locking member 500 rotates from the unlocked position to the locked position, the locking member 500 partially passes through the notch 411 and extends into the inner side of the skirt 410. When the limiting protrusion 510 on the locking member 500 passes through the notch 411, the skirt 410 is elastically deformed under the push of the limiting protrusion 510. , so that the recess 411 is opened from the initial width to the width for the limiting protrusion 510 to pass through. After the limiting protrusion 510 passes over the recess 411 and enters the inner side of the skirt 410, the locking member 500 reaches the locked position. At this time, the bottom of the locking member 500 engages with the tooth portion 110, and the tooth portion 110 can limit the locking member 500 in the circumferential direction, so that the handwheel 400 cannot drive the locking member 500 to rotate around the central axis of the handwheel 400. At the same time, the recess 411 is reset to its initial width, so that the limiting protrusion 510 abuts against the inner side wall of the skirt 410 on the side of the recess 411 to prevent the locking member 500 from disengaging from the locked position, thereby keeping the locking member 500 locked.

[0039] The present invention provides a locking member 500 rotatably connected to the handwheel 400 on the handwheel 400 and provides a notch 411 on the skirt 410 of the handwheel 400, and at the same time provides a tooth portion 110 on the valve housing 100, so that if the user needs to rotate the handwheel 400 to close the fluid channel 121 or open the fluid channel 121 and adjust the liquid flow in the fluid channel 121, the locking member 500 can be rotated to an unlocked position disengaged from the tooth portion 110. At this time, the user can rotate the handwheel 400 at will to drive the main shaft 200 to rotate together. The main shaft 200 converts the rotation into axial movement to drive the diaphragm 300 to reciprocate in the axial direction, thereby opening and closing the fluid channel 121 or controlling the liquid flow in the fluid channel 121 through the diaphragm 300. When the user has finished turning the handwheel 400 and no longer needs to turn the handwheel 400, the locking piece 500 can be rotated so that the locking piece 500 passes through the notch 411 of the skirt 410 and reaches the inner side of the skirt 410 and engages with the toothed portion 110 at the top of the valve housing 100. At this time, the locking piece 500 is in the locked position, and the toothed portion 110 can limit the locking piece 500 in the circumferential direction, so that the handwheel 400 cannot drive the locking piece 500 to rotate around the central axis of the handwheel 400, thereby preventing the handwheel 400 from being hit or rotating due to user misoperation, and keeping the diaphragm 300 in the set position to keep the fluid channel 121 closed or for the set flow rate of liquid to flow, with stable and reliable operation and high safety when transmitting corrosive liquids. By providing a limiting protrusion 510 on the side of the locking member 500, when the locking member 500 switches between the locked position and the unlocked position, when the limiting protrusion 510 on the locking member 500 passes through the notch 411, the skirt 410 is pushed by the limiting protrusion 510 to elastically deform, so that the notch 411 is expanded from the initial width to the width for the limiting protrusion 510 to pass through. After the limiting protrusion 510 passes over the notch 411, the notch 411 is restored to its initial width. When pushed, the limiting protrusion 510 can no longer pass through the recess 411, so that the limiting protrusion 510 is limited by the recess 411, thereby limiting the locking member 500, so that the locking member 500 remains in the locked position or the unlocked position, to avoid the locking member 500 from freely disengaging from the tooth portion 110 and being unable to limit the rotation of the handwheel 400, and to avoid the locking member 500 from freely switching from the unlocked position to the locked position and affecting the user's rotation of the handwheel 400, thereby improving the user's experience.

[0040] The hand wheel 400 in this embodiment also includes a reinforcing portion 420, which is connected to the inner side wall of the skirt 410 to enhance the strength of the skirt 410. After the limiting protrusion 510 on the locking member 500 passes through the notch 411 to engage the locking member 500 with the tooth portion 110, the skirt 410 is less likely to deform. When the user slightly touches the locking member 500 by mistake, the locking member 500 will not be disengaged from the position engaged with the tooth portion 110, preventing the user from operating it incorrectly. Because the setting of the notch 411 will reduce the strength of the skirt 410 to a certain extent, the setting of the reinforcing portion 420 connected to the skirt 410 can also support the skirt 410 to avoid excessive torsion deformation and damage to the skirt 410 when the hand wheel 400 is rotated. Figure 8 As shown, the handwheel 400 also includes an inner cylinder portion 430, which is arranged around the main shaft 200. The inner side wall of the inner cylinder portion 430 is engaged with the main shaft 200 to drive the main shaft 200 to rotate. The skirt portion 410 surrounds the outer peripheral side of the inner cylinder portion 430. The reinforcement portion 420 is located between the skirt portion 410 and the inner cylinder portion 430. The two ends of the reinforcement portion 420 are respectively connected to the inner side wall of the skirt portion 410 and the outer side wall of the inner cylinder portion 430 to simultaneously enhance the strength of the skirt portion 410 and the inner cylinder portion 430. When the user rotates the handwheel 400, the handwheel 400 can drive the inner cylinder portion 430 and the skirt portion 410 to rotate as a whole through the reinforcement portion 420, thereby avoiding the upper and lower ends of the inner cylinder portion 430 from rotating asynchronously and twisting, and the transmission effect is better.

[0041] The inner cylinder portion 430 in this embodiment can be either an integral or split structure. Preferably, the inner cylinder portion 430 includes a first arcuate segment 431 and a second arcuate segment 432, which together enclose the inner cylinder portion 430. The first arcuate segment 431 is located near the recess 411, while the second arcuate segment 432 is located away from the recess 411. A separation gap 433 is formed between the ends of the first arcuate segment 431 and the ends of the second arcuate segment 432. The reinforcement portion 420 in this embodiment includes a first reinforcement rib 421, which is connected between the inner sidewall of the skirt portion 410 on the side of the recess 411 and the first arcuate segment 431. Preferably, two first reinforcement ribs 421 are provided, one connected to the skirt portion 410 on either side of the recess 411, thereby simultaneously enhancing the strength of the skirt portion 410 on both sides of the recess 411. The provision of the separation gap 433 allows the first arcuate segment 431 to deform to a certain extent. When the limiting protrusion 510 on the locking member 500 passes through the notch 411, the skirt 410 elastically deforms, causing the first reinforcing rib 421 to deform along with the skirt 410, which in turn causes the first arcuate segment 431 to deform. This reduces the difficulty of rotating the locking member 500, making it easier for the user to rotate the locking member 500 to switch between the locked and unlocked positions with less effort, thus facilitating user operation. The reinforcing portion 420 in this embodiment also includes a second reinforcing rib 422 connected between the second arcuate segment 432 and the inner sidewall of the skirt 410. This rib 422 can enhance the strength of the second arcuate segment 432 and drive the second arcuate segment 432 to rotate when the user turns the handwheel 400, thereby improving the transmission effect.

[0042] In this embodiment, if Figure 4 As shown, the hand wheel 400 also includes a limiting member 440, and two limiting protrusions 412 protruding from the outer wall of the skirt 410 are provided on the outer wall of the skirt 410. The two limiting protrusions 412 are respectively located on both sides of the recess 411, and each of the two limiting protrusions 412 is provided with a limiting hole 4121. The limiting holes 4121 on the two limiting protrusions 412 respectively pass through the corresponding limiting protrusions 412 horizontally and are coaxially arranged. When the locking member 500 is rotated to the locked position, the locking member 500 is locked. 00 just avoids the limit hole 4121, and the limit member 440 is passed horizontally through the two opposite limit holes 4121, which can abut against the side of the locking member 500 to prevent the locking member 500 from rotating from the locked position to the unlocked position, thereby limiting the locking member 500, avoiding the locking member 500 from freely disengaging from the locked position, preventing the user from colliding and turning the handwheel 400 or misoperating, ensuring the stability of the position of the diaphragm 300, and thus ensuring the stable closure of the manual valve or the control of the flow rate.

[0043] like Figure 8As shown, the handwheel 400 further includes an operating portion 450, which is disposed at the top of the skirt 410 and protrudes from the outer periphery of the skirt 410 for a user to grasp. A mounting groove 451 is provided on the operating portion 450, extending longitudinally through the operating portion 450. The upper end of the locking member 500 is located within the mounting groove 451, and the locking member 500 is rotatably connected to the inner wall of the mounting groove 451 via a horizontally disposed rotating shaft 452. The top width of the mounting groove 451 (i.e., the distance between the two opposing inner walls of the mounting groove 451) is specified as A, satisfying the requirement of 8 mm ≤ A ≤ 16 mm. By setting the width of the mounting groove 451 to be no greater than 16 mm, that is, less than the width of a finger, the user's finger cannot be inserted into the mounting groove 451 with the tip of the finger facing downward to press the locking member 500, thereby preventing the user's finger from accidentally touching the locking member 500 when turning the hand wheel 400, causing the locking member 500 to rotate to the locked position; by setting the width of the mounting groove 451 to be no less than 8 mm, that is, no less than the thickness of a finger, when the user needs to rotate the locking member 500 to the locked position, the user can turn the finger sideways and insert the side of the finger into the mounting groove 451 to press the locking member 500 to the locked position, which is easy to operate and prevents the user from accidentally touching the locking member 500 when turning the hand wheel 400.

[0044] The locking member 500 in this embodiment is in an inverted L-shape, so that the user can press down or pull up the locking member 500 to rotate the locking member 500. An upwardly disposed limiting platform 520 is provided on the locking member 500. When the locking member 500 rotates from the locked position to the unlocked position, Figure 2 As shown, when the limiting platform 520 abuts against the bottom of the operating part 450, the locking member 500 no longer rotates. At this time, the locking member 500 is in the unlocked position. The locking member 500 abuts against the operating part 450 through the limiting platform 520, prompting the user to rotate the locking member 500 into place, avoiding excessive rotation of the locking member 500, improving the user's experience, and at the same time keeping the top of the locking member 500 flush with the top surface of the operating part 450 in the unlocked position, which is more beautiful.

[0045] The mounting groove 451 in this embodiment has a horizontally extending rotating shaft 452 between the two opposing inner walls. The rotating shaft 452 and the operating portion 450 are an integral structure. A pivot hole 530 is provided on the locking member 500. The pivot hole 530 has an opening 531. The width of the opening 531 is smaller than the inner diameter of the pivot hole 530. During installation, the locking member 500 can be snapped into the rotating shaft 452. That is, the rotating shaft 452 is elastically deformed through the opening 531 and snapped into the pivot hole 530, so that relative rotation can occur between the locking member 500 and the rotating shaft 452. Because the width of the opening 531 is smaller than the inner diameter of the pivot hole 530, the locking member 500 and the rotating shaft 452 can be effectively prevented from being freely disengaged. The snap connection method allows the user to replace the locking member 500 by himself when it is damaged, thereby reducing the cost of repair and replacement.

[0046] like Figure 4 and Figure 5 As shown, in this embodiment, the tooth portion 110 includes a plurality of limiting teeth 111, and the plurality of limiting teeth 111 are arranged at intervals around the main shaft 200 and are located on the inner side of the skirt 410, so that the skirt 410 can cover and protect the limiting teeth 111, which is more beautiful and prevents the limiting teeth 111 from being damaged by collision. A stop gap 112 is formed between two adjacent limiting teeth 111. When the locking member 500 rotates from the unlocked position to the locked position, the lower end of the locking member 500 rotates to the inner side of the skirt 410 through the recess 411 and is finally inserted into the stop gap 112, thereby realizing the engagement of the locking member 500 with the tooth portion 110. If the handwheel 400 is hit or the user operates it incorrectly, the locking member 500 will resist the limiting teeth 111 on both sides of the stop gap 112 to prevent the handwheel 400 from rotating, and the limiting effect is good. The arrangement of multiple limiting teeth 111 surrounding the main shaft 200 allows the user to stop the handwheel 400 by plugging the locking member 500 into the corresponding stop gap 112 when rotating the locking member 500 to align with any stop gap 112, which is convenient and simple to operate.

[0047] like Figure 3 As shown, the valve housing 100 in this embodiment includes a valve body 120, an upper housing 130 and an upper cover 140. The fluid channel 121 is provided on the valve body 120. A valve port is provided on the side of the fluid channel 121. The diaphragm 300 is provided at the valve port. The upper housing 130 is mounted on the valve body 120. The bottom of the upper housing 130 abuts against the top of the diaphragm 300. The upper cover 140 is located on the outer peripheral side of the upper housing 130. The upper cover 140 is threadedly connected to the valve body 120 and is in contact with the valve body 120. The top of the upper shell 130 abuts against the valve body 120. Under the pressure of the upper cover 140, the upper shell 130 and the valve body 120 on the periphery of the valve port jointly clamp the outer circumference of the diaphragm 300. The upper cover 140 limits the upper shell 130 in the axial, circumferential, and radial directions to prevent the upper shell 130 from freely moving upward. That is, the upper cover 140 presses the diaphragm 300 against the valve body 120 through the upper shell 130, ensuring a stable seal between the diaphragm 300 and the valve body 120 to prevent water leakage. Of course, it is understandable that the limiting teeth 111 in this embodiment can be all located on the top of the upper shell 130 or all located on the top of the upper cover 140.

[0048] The main shaft 200 includes a shaft body 210 and a sleeve 220. The bottom of the shaft body 210 is connected to the center position of the diaphragm 300. The sleeve 220 is threadedly connected to the outside of the shaft body 210. The sleeve 220 is located on the inner side of the inner cylinder 430. The inner cylinder 430 drives the sleeve 220 to rotate through the cooperation of keys and keyways respectively arranged on the outer wall of the sleeve 220 and the inner wall of the inner cylinder 430. When the sleeve 220 rotates, it drives the shaft body 210 threadedly connected to the inner side of the sleeve 220 to move axially, thereby driving the center position of the diaphragm 300 to deform, so as to open and control the liquid flow rate flowing through the fluid channel 121 or close the fluid channel 121. Through the cooperation of the threaded shaft body 210 and the sleeve 220, the rotation of the handwheel 400 can be converted into the up and down movement of the diaphragm 300. The structure is simple and the operation is stable and reliable.

[0049] Example 2:

[0050] The difference between this embodiment and embodiment one is that, in this embodiment, a limiting protrusion is provided on the outer side wall of the skirt and is located on one side of the recess, and a limiting hole is provided on the limiting protrusion and the locking piece respectively. The limiting hole on the limiting protrusion passes through the limiting protrusion horizontally, and the limiting hole on the locking piece passes through the locking piece horizontally. When the locking piece is in the locked position engaged with the tooth portion, the portion of the locking piece where the limiting hole is provided is opposite to the limiting protrusion, so that the limiting hole on the locking piece is aligned with the limiting hole on the limiting protrusion. At this time, by passing the limiting piece horizontally through the two limiting holes, the locking piece can be prevented from rotating, and the locking piece can be limited so that the locking piece remains in the locked position.

Claims

1. A manual valve comprising: a valve housing having a fluid passage for passage of fluid; The valve assembly includes a main shaft, a diaphragm connected to the main shaft, and a handwheel rotatably connected to the top of the valve housing, wherein the handwheel engages with the main shaft to drive the main shaft to rotate, and the main shaft drives the diaphragm to reciprocate axially to open and close the fluid channel through rotation; Its characteristics are: The top of the valve housing is provided with a tooth portion; The hand wheel comprises a downwardly extending skirt, wherein the skirt is provided with a notch; The hand wheel is rotatably connected to a locking member that can pass through the notch, and the side of the locking member is provided with a limiting protrusion; wherein, The skirt portion is elastically deformed when the limiting protrusion passes through the notch, and is reset to maintain a locked state after the limiting protrusion passes over the notch and engages with the tooth portion.

2. A manual valve according to claim 1, characterized in that: The hand wheel further includes a reinforcement portion connected to the side wall of the skirt portion.

3. A manual valve according to claim 2, characterized in that: The hand wheel further includes an inner cylinder portion, which is disposed around the main shaft and meshed with the main shaft. The skirt portion surrounds the outer circumference of the inner cylinder portion, and the reinforcement portion is connected between the inner cylinder portion and the skirt portion.

4. A manual valve according to claim 3, characterized in that: The inner cylinder portion includes a first arc segment close to the recess and a second arc segment away from the recess, and a separation gap is provided between the end of the first arc segment and the end of the second arc segment. The reinforcement portion includes a first reinforcement rib, and the first reinforcement rib is connected between the inner side wall of the skirt on the side of the recess and the first arc segment.

5. A manual valve according to claim 4, characterized in that: The reinforcement portion further includes a second reinforcement rib connected between the second arc-shaped segment and the inner side wall of the skirt.

6. A manual valve according to claim 1, characterized in that: The handwheel also includes a limiting piece, and the outer side wall of the skirt is provided with limiting protrusions respectively located on both sides of the recess. When the locking piece is in the locked position, the limiting piece is horizontally passed through the two limiting protrusions to prevent the locking piece from rotating to the unlocked position; or, the handwheel also includes a limiting piece, and the outer side wall of the skirt is provided with a limiting protrusion located on one side of the recess, and the limiting protrusion and the locking piece are both provided with limiting holes, and the limiting piece horizontally passes through the two limiting holes to prevent the locking piece from rotating.

7. The manual valve according to claim 1, characterized in that: The handwheel also includes an operating portion, which is provided with a mounting groove that longitudinally penetrates the operating portion. The upper end of the locking member is rotatably connected to the mounting groove. The top width of the mounting groove is A, satisfying 8mm≤A≤16mm.

8. A manual valve according to claim 7, characterized in that: A limiting platform is provided on the locking member. When the top of the limiting platform abuts against the bottom of the operating portion, the locking member is in an unlocked position.

9. A manual valve according to claim 8, characterized in that: A horizontally extending rotating shaft is provided between the two opposite inner walls of the mounting groove, and a pivot hole with an opening is provided on the locking member, the width of the opening is smaller than the inner diameter of the pivot hole, and the rotating shaft is inserted into the pivot hole through the opening so that the locking member is rotatably connected to the rotating shaft.

10. The manual valve according to claim 1, characterized in that: The tooth portion includes a plurality of limiting teeth arranged around the main shaft, and the plurality of limiting teeth are arranged at intervals on the inner side of the skirt portion to form a stop gap between two adjacent limiting teeth, and the locking member is inserted into the stop gap to engage with the limiting teeth; The valve housing includes a valve body provided with a fluid passage, an upper housing mounted on the valve body, and an upper cover. The upper cover is threadedly connected to the valve body and abuts against the top of the upper housing so as to clamp the circumference of the diaphragm together with the upper housing and the valve body. The limiting teeth are provided on the top of the upper housing or the top of the upper cover. The main shaft includes a shaft body and a sleeve, the sleeve is threadedly connected to the outside of the shaft body, the diaphragm is installed at the bottom of the shaft body, and the handwheel is engaged with the outside of the sleeve to drive the sleeve to rotate, thereby driving the shaft body to move axially.

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