Manual diaphragm valve

Abstract

The manual diaphragm valve comprises a valve body, a valve seat, a diaphragm and an actuator, the actuator comprises a shell, a valve rod arranged on the shell in a penetrating mode and a rotating wheel located above the shell, the rotating wheel is fixedly connected with the valve rod, the rotating wheel rotates to drive the valve rod to rotate, and a first limiting part and a second limiting part are arranged on the rotating wheel and the shell respectively. The positions of the two first limiting parts correspond to the valve opening position and the valve closing position respectively, when the rotating wheel rotates to the valve opening position in the first direction, the second limiting part collides with one of the first limiting parts and is movably connected with the first limiting part in a clamped mode, an operator can judge that the valve is opened in place after hearing collision sound, and when the rotating wheel rotates to the valve closing position in the second direction, the second limiting part collides with the second limiting part. The second limiting part collides with the other first limiting part and is movably clamped with the first limiting part, and an operator can judge that the valve is closed in place after hearing collision sound and hand feeling prompt; operation and judgment are simple and not prone to interference, the accuracy of valve opening and valve closing is guaranteed, and mistaken touch or misoperation is avoided.

Description

Technical Field

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

[0002] A modular gas supply system (IGS) is a type of gas control equipment used in the semiconductor industry. As semiconductor manufacturing processes become increasingly advanced, the requirements for gas control equipment are also increasing. Modular gas systems utilize a combination of flow blocks and fluid controllers (likely stacking blocks) to form at least one pipeline route on a substrate. This modular design reduces the size of the equipment while simplifying installation and maintenance.

[0003] For example, an existing fluid control device / system includes at least one pipeline line, each pipeline line includes several fluid controllers and flow path blocks, where the fluid controller can be a pneumatic diaphragm valve, a manual diaphragm valve, etc. Valves in the pipeline line are mainly used to control the on and off of process gases.

[0004] The manual diaphragm valve includes a valve body and a manual actuator connected to the valve body. The valve body is provided with a diaphragm, a valve seat, a fluid inlet passage and a fluid outlet passage. The diaphragm is located above the valve seat, and the outer edge is pressed and sealed. Under the action of the manual actuator, it undergoes elastic deformation, sealing or separating from the valve seat, isolating or conducting the fluid inlet passage and the fluid outflow passage; the manual diaphragm valve is opened and closed by manual operation, and it includes a shell connected to the top of the valve body, and a valve stem passing through the shell. A rotary wheel located outside the shell is fixed to the top of the valve stem. The rotary wheel can be rotated to drive the valve stem to rotate and move to perform lifting and lowering to directly or indirectly press against the diaphragm, so that the diaphragm is deformed and abuts against the valve seat for sealing or the diaphragm bounces back to close or open the diaphragm valve. Therefore, the valve has an open valve position and a closed valve position.

[0005] However, the manual diaphragm valve in the prior art has the following problems: since the valve stem is located inside the shell, the operator cannot accurately know and perceive the specific position of the valve stem and the state of the diaphragm. Although the rotation direction and position of the opening and closing valve can be marked on the outside of the shell, in some narrow installation spaces, the operator cannot see the accurate marked opening and closing positions of the valve and only knows the rotation direction of the opening and closing valve, which increases the difficulty of operation and may cause problems such as failure of the diaphragm to close the valve or insufficient valve opening. Utility Model Content

[0006] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a manual diaphragm valve, which solves the problem that the existing manual diaphragm valve cannot sense and determine the valve open position and the valve closed position during operation.

[0007] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0008] A manual diaphragm valve, comprising:

[0009] A valve body having a first fluid passage and a second fluid passage;

[0010] a valve seat, disposed on the valve body and surrounding an outer peripheral side of a top end of the first fluid channel, wherein the first fluid channel is connected to the second fluid channel via the valve seat;

[0011] a diaphragm, elastically deformable and sealingly disposed above the valve seat;

[0012] An actuator connected to the top of the valve body,

[0013] The actuator includes a housing, a valve stem passing through the housing, and a rotor located above the housing. The rotor is fixedly connected to the valve stem. The rotor rotates to drive the valve stem to rotate. The rotor has a valve-opening position and a valve-closing position. When the rotor is in the valve-opening position, the diaphragm is separated from the valve seat to open the diaphragm valve. When the rotor is in the valve-closing position, the valve stem drives the diaphragm to abut against the valve seat to isolate the diaphragm valve.

[0014] One of the rotating wheel and the housing is provided with two first limiting parts, and the other is provided with a second limiting part cooperating with the first limiting part. When the rotating wheel rotates along a first direction to the valve opening position, the second limiting part collides with one of the first limiting parts and is movably engaged. When the rotating wheel rotates along a second direction opposite to the first direction to the valve closing position, the second limiting part collides with the other first limiting part and is movably engaged.

[0015] The manual diaphragm valve of the present invention can be provided with a first limit part and a second limit part on the rotary wheel and the shell respectively, and the positions of the two first limit parts correspond to the valve opening position and the valve closing position respectively. When the operator manually operates the rotary wheel to rotate along the first direction to the valve opening position, the second limit part collides with one of the first limit parts and movably engages, and the operator can judge that the valve is in place after hearing the collision sound, and the friction contact during the collision provides the operator with a hand feeling to sense that the valve is in place. When the rotary wheel rotates along the second direction to the valve closing position, the second limit part collides with the other first limit part and movably engages, and the operator can judge that the valve is in place after hearing the collision sound, and the friction contact during the collision provides the operator with a hand feeling to sense that the valve is in place. The valve is in place; therefore, operation and judgment are relatively simple, and the collision and clamping are achieved through the cooperation of the first limit part and the second limit part, and the sound and friction feel generated by the collision and clamping are provided to the operator, which is not easily disturbed by the installation space, thereby ensuring the accuracy of opening and closing the valve. In addition, due to the cooperation of the clamping and fixing of the first limit part and the second limit part, the wheel rotates more stably in the valve opening position and the valve closing position. The valve opening and closing switching operation can only be performed when the operator uses a force greater than the force for releasing the clamping and fixing of the first limit part and the second limit part to twist the wheel, thereby avoiding the operator's misoperation and external interference that cause unnecessary rotation of the wheel, thereby preventing the accuracy of the valve opening position and the valve closing position from being affected.

[0016] Preferably, the two first limiting portions are two limiting grooves spaced apart on the bottom surface of the rotating wheel;

[0017] A mounting groove is provided on the top surface of the shell, and the second limiting portion includes a limiting member axially movably arranged in the mounting groove and a spring located axially below the limiting member. The limiting member elastically presses against the spring, and the spring generates an axial thrust force on the limiting member, so that the limiting member collides with the limiting groove and is movably engaged.

[0018] With this arrangement, the collision sound and the friction feel are generated based on the cooperation between the axial thrust of the spring and the limiting groove. The limiting groove, the limiting member and the spring have a simple structure, are easy to process, and their dimensions are easy to control, thereby controlling the size of the collision sound and the strength of the friction feel. The elastic coefficient of the spring and the depth of the limiting groove can be set based on the size of the wheel and the shell, thereby controlling the size of the collision sound and the strength of the friction feel and ensuring the accuracy of the operation; and the spring is used to control the movable engagement between the limiting member and the limiting groove, which will not interfere with the normal rotation of the wheel, making it easier for the wheel to rotate and switch between the open valve position and the closed valve position.

[0019] Preferably, the limiting groove has an inclined groove wall, and the limiting member has an arc surface that contacts and cooperates with the inclined groove wall; this makes it easier for the limiting member to be inserted into or removed from the limiting groove, and on the basis of ensuring the collision sound and friction feel, it avoids interfering with the normal rotation of the wheel, making the manual diaphragm valve easier to operate and easier to switch between the open and closed states.

[0020] Preferably, the second limiting portion further includes a mounting seat inserted into the mounting groove, the mounting seat having a cavity for accommodating the spring and the limiting member, and an opening communicating with the cavity on the top surface of the mounting seat. Under the action of the spring, the limiting member can be at least partially exposed from the opening to collide with and flexibly engage with the limiting groove. The mounting seat serves to limit and guide the spring and the limiting member, ensuring that the limiting member moves axially and accurately collides with and flexibly engages with the limiting groove.

[0021] Preferably, the runner includes two stop surfaces, the runner has a notch, and two circumferential side surfaces of the notch are respectively formed as the two stop surfaces;

[0022] The housing is further provided with a stop portion that cooperates with the stop surface. When the wheel rotates along the first direction to the valve-opening position, the stop portion abuts against one of the stop surfaces to prevent the wheel from continuing to rotate along the first direction. When the wheel rotates along the second direction to the valve-closing position, the stop portion abuts against the other stop surface to prevent the wheel from continuing to rotate along the second direction.

[0023] With this arrangement, the stop surface cooperates with the stop portion to limit the further rotation of the wheel in the original direction. As a result, even if the operator does not hear the collision sound or the friction is not obvious, the wheel cannot be rotated further, and the wheel is limited to the open valve position or the closed valve position. The stop surface and the stop portion cooperate with the first limit portion and the second limit portion to further enhance the prevention of accidental touch interference and provide perception, thereby achieving double insurance. The wheel will not be easily affected by external disturbances or misoperation and be in an incorrect position.

[0024] Preferably, the stop portion includes a pin inserted into the top surface of the shell, and the pin is exposed in the notch. The pin has a simple structure and low cost, and a prompt sound is emitted when the pin contacts the stop surface, which has the same prompt effect as the collision sound between the first limiting portion and the second limiting portion.

[0025] Preferably, the actuator also includes a knob, the knob cover is arranged on the outside of the rotating wheel and is fixedly connected to the rotating wheel, and the interior of the knob has a cavity that accommodates and surrounds the rotating wheel and the stop portion; the function of the knob is to facilitate the operator's hand-held operation and make it easier to rotate the rotating wheel, and the knob forms a cover to protect the rotating wheel and the stop portion inside it.

[0026] Preferably, the valve stem includes a rotating rod and a screw, the top end of the rotating rod is fixedly connected to the rotating wheel, the rotating rod can rotatably pass through the shell, the screw is threadedly engaged with the shell, and the bottom end of the rotating rod is circumferentially limited with the top end of the screw, so that when the rotating rod rotates, the screw is driven to rotate, and the screw directly or indirectly presses the diaphragm.

[0027] With such arrangement, the screw rotates circumferentially and moves axially under the rotation of the rotating rod, and the axial movement distance corresponds to the rotation angle of the impeller. When the impeller rotates to the valve closing position, the screw directly or indirectly presses the diaphragm, so that the diaphragm and the valve seat are sealed, and the valve is accurately and completely closed; and when the impeller rotates to the valve opening position, the screw moves axially away from the diaphragm, ensuring that the first fluid channel and the second fluid channel are connected through the valve seat, and the manual diaphragm valve is in the valve opening state; the screw is used to convert the rotation of the impeller into rotational movement, so as to effectively ensure the sealing or separation state of the diaphragm and the valve seat.

[0028] Preferably, a mounting hole is provided on the bottom surface of the rotating wheel, the top end of the rotating rod extends into the mounting hole, and an annular groove is provided on the side surface of the top end of the rotating rod, and a radial hole is provided on the side surface of the rotating wheel, the radial hole is connected to the mounting hole, and a fastener is provided in the radial hole, and a part of the end of the fastener extends into the annular groove and presses against the groove wall.

[0029] With this arrangement, the top end of the rotating rod is located inside the rotating wheel. If it is connected to the fastener through a single circular hole, it is difficult to align the circular hole and the radial hole after the rotating rod is inserted into the mounting hole. In this way, an annular groove is used to cooperate with the fastener, and the rotating rod can be fixed in the rotating wheel without aligning the fastener and the circular hole, which reduces the difficulty of assembly and improves the assembly efficiency. At the same time, the annular groove cooperates with the fastener in the axial limit position, and the rotating rod cannot move in the axial direction, thereby ensuring the firmness of the rotating rod.

[0030] Preferably, a limit collar is provided on the rotating rod and is located between the top surface of the shell and the rotating wheel. The limit collar is sleeved on the rotating rod and the two can rotate relative to each other. The part of the rotating rod extending into the inner side of the shell is in rotational friction contact with the inner wall of the shell through an O-ring.

[0031] With this arrangement, the function of the limit collar is also to prevent the rotating rod from moving axially; and the rotating rod and the inner wall of the shell are in rotational friction contact through the O-ring, which can further enhance the tactile prompt when the wheel rotates, and cooperate with the first limit part and the second limit part to increase the friction force when the rotating rod and the wheel rotate, thereby preventing the wheel from rotating too fast; at the same time, it can also play a role in radial limiting the rotating rod to prevent the rotating rod from shaking.

[0032] In summary, compared with the prior art, the present invention has at least the following beneficial effects:

[0033] The manual diaphragm valve of the utility model can be provided with a first limiting part and a second limiting part on the rotor and the housing respectively, and the positions of the two first limiting parts correspond to the valve opening position and the valve closing position respectively. When the rotor rotates along the first direction to the valve opening position, the second limiting part collides with one of the first limiting parts and is movably engaged. The operator can judge that the valve is in the right position after hearing the collision sound. At the same time, the friction contact during the collision provides the operator with a hand feeling to sense that the valve is in the right position. When the rotor rotates along the second direction to the valve closing position, the second limiting part collides with the other first limiting part and is movably engaged. The operator can judge that the valve is in the right position after hearing the collision sound. At the same time, the friction contact during the collision provides the operator with a hand feeling to sense that the valve is in the right position. The operation and judgment are relatively simple. The collision and engagement are achieved through the cooperation of the first limiting part and the second limiting part. The collision and engagement generate a sound and a friction feel to provide to the operator. It is not easily affected by the interference of the installation space, thereby ensuring the accuracy of the valve opening and closing. In addition, due to the clamping and fixing of the first limiting part and the second limiting part, the unnecessary rotation of the rotor caused by the operator's misoperation and external interference is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0035] Figure 1 This is a structural diagram of a manual diaphragm valve according to an embodiment of the present utility model.

[0036] Figure 2 This is a schematic diagram of the internal cross-sectional structure of a manual diaphragm valve according to an embodiment of the present utility model.

[0037] Figure 3 This is a schematic structural diagram of the rotating wheel and the rotating rod according to an embodiment of the present utility model.

[0038] Figure 4 Schematic diagram of the stop surface and the stop portion according to an embodiment of the present invention.

[0039] Figure 5 Schematic diagram of the second limiting portion of an embodiment of the present utility model.

[0040] Figure 6 This is a schematic structural diagram of a rotating wheel according to an embodiment of the present utility model.

[0041] Figure 7 This is a schematic structural diagram of a housing according to an embodiment of the present invention.

[0042] Description of Reference Numerals

[0043] 10. Valve body; 11. First fluid channel; 12. Second fluid channel;

[0044] 20. Valve seat;

[0045] 30. Diaphragm;

[0046] 40. Housing; 41. Stopper; 411. Arc surface; 42. Spring; 43. Mounting groove; 44. Mounting seat; 441. Cavity; 442. Opening; 45. Latch; 46. Slot;

[0047] 50. Valve stem; 51. Rotating rod; 511. Annular groove; 512. Limiting collar; 513. O-ring; 52. Screw; 53. Diaphragm pressing piece;

[0048] 60. Rotor; 61. Limiting groove; 611. Inclined groove wall; 62. Notch; 621. Stop surface; 63. Circular mounting post; 631. Threaded hole; 64. Mounting hole; 65. Radial hole; 66. Fastener;

[0049] 70. Knob; 71. Cavity; 72. Through hole. DETAILED DESCRIPTION

[0050] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0051] 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 positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on 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.

[0052] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections 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 the specific circumstances.

[0053] like Figures 1 to 3 As shown, an embodiment of the present invention discloses a manual diaphragm valve, including a valve body 10, a valve seat 20, a diaphragm 30 and an actuator, the valve body 10 having a first fluid channel 11 and a second fluid channel 12, the valve seat 20 being an annular structure, arranged in the valve body 10, and surrounding the outer peripheral side of the top end of the first fluid channel 11; the first fluid channel 11 is connected to the second fluid channel 12 via the valve seat 20; in this embodiment, the first fluid channel 11 is a fluid inflow channel, and the second fluid channel 12 is a fluid outflow channel, wherein the fluid is a process gas in a semiconductor process; the diaphragm 30 of this embodiment is elastically deformable and is arranged above the valve seat 20, wherein the diaphragm 30 is made of metal, and the diaphragm 30 with an appropriate thickness has sufficient strength and elasticity, such as nickel-cobalt alloy or stainless steel; the valve seat 20 is made of plastic, such as PFA or PTFE or PTCFE.

[0054] The actuator of this embodiment is connected to the top of the valve body 10 and is also located above the diaphragm 30. Its function is to drive the diaphragm 30 into contact with or separate from the valve seat 20 to isolate or open the diaphragm valve. The actuator includes a housing 40, a valve stem 50 extending through the housing 40, and a rotor 60 located above the housing 40. The rotor 60 is fixedly connected to the valve stem 50. Rotation of the rotor 60 drives the valve stem 50 to rotate, and the valve stem 50 drives the diaphragm 30 into contact with or separate from the valve seat 20 to isolate or open the diaphragm valve. Because the valve stem 50 is located within the housing 40 and is not visible, the rotor 60 is required to determine the state of the valve stem 50 and the diaphragm 30. That is, the rotor 60 rotates into an open position and a closed position. When the rotor 60 is in the open position, the diaphragm 30 separates from the valve seat 20 to open the diaphragm valve. When the rotor 60 is in the closed position, the valve stem 50 drives the diaphragm 30 into contact with the valve seat 20 to isolate the diaphragm valve.

[0055] In order to facilitate the operator to determine the valve opening position and the valve closing position, one of the wheel 60 and the housing 40 is provided with two first limiting parts, and the other is provided with a second limiting part cooperating with the first limiting part. The wheel 60 rotates along the first direction to the valve opening position, and the second limiting part collides with one of the first limiting parts and is movably engaged. The wheel 60 rotates along the second direction opposite to the first direction to the valve closing position, and the second limiting part collides with the other first limiting part and is movably engaged. For example, the first direction can be clockwise and the second direction is counterclockwise, or the first direction can be counterclockwise and the second direction is clockwise. The positions of the two first limiting parts correspond to the valve opening position and the valve closing position respectively. When the wheel 60 rotates along the first direction to the valve opening position, the second limiting part collides with one of the first limiting parts and is movably engaged. The operator can judge that the valve is in place after hearing the collision sound and the hand feeling prompt. When the wheel 60 rotates along the second direction to the valve closing position, the second limiting part collides with the other first limiting part and is movably engaged. The operator can judge that the valve is in place after hearing the collision sound and the hand feeling prompt. The operation and judgment are relatively simple and not easily interfered with, which ensures the accuracy of valve opening and closing. At the same time, due to the clamping and fixing effect of the first limiting part and the second limiting part, unnecessary rotation of the wheel 60 caused by misoperation and mistouch is avoided, which affects the valve opening and closing status.

[0056] It should be noted that the two collision sounds may be the same, and the operator can judge whether the valve is open or closed based on the rotation direction; the two collision sounds may be different, and the operator can directly judge whether the valve is open or closed by the collision sound. Similarly, the two tactile prompts may be the same, and the operator can judge whether the valve is open or closed based on the rotation direction; the two tactile prompts may be different, and the operator can directly judge whether the valve is open or closed by the tactile prompt; and the operator can also judge whether the valve is open or closed by combining the collision sound with the tactile prompt.

[0057] In one specific embodiment, the first limiting portion is provided on the rotating wheel 60 , and correspondingly, the second limiting portion is provided on the housing 40 ; in another specific embodiment, the second limiting portion is provided on the rotating wheel 60 , and correspondingly, the first limiting portion is provided on the housing 40 .

[0058] like Figure 3 In the embodiment shown, the first limiting portion is arranged on the rotating wheel 60, and correspondingly, the second limiting portion is arranged on the shell 40. Specifically, the two first limiting portions are two limiting grooves 61 arranged at intervals on the bottom surface of the rotating wheel 60, and the top surface of the shell 40 is provided with a mounting groove 43. The second limiting portion includes a limiting member 41 axially movably arranged in the mounting groove 43 and a spring 42 located axially below the limiting member 41. The limiting member 41 elastically presses the spring 42, and the spring 42 generates an axial pushing force on the limiting member 41, so that the limiting member 41 collides with the limiting groove 61 and is movably engaged.

[0059] Specifically, when the rotating wheel 60 is in a position between the valve opening position and the valve closing position, the limiting groove 61 and the installation groove 43 are in a misaligned state, and the limiting member 41 is abutted against the bottom surface of the rotating wheel 60 under the action of the spring 42, and the spring 42 is in a compressed state. When one of the limiting grooves 61 is aligned with the installation groove 43, the limiting member 41 is pushed toward the limiting groove 61 by the spring 42 and collides with the limiting groove 61, making a collision sound, and movably engaging with the limiting groove 61 to provide a tactile prompt; the size of the collision sound and the strength of the tactile prompt The strength of the impact noise is related to the size of the axial thrust of the spring 42 and the depth of the limiting groove 61. For example, the greater the axial thrust of the spring 42 and the deeper the limiting groove 61, the greater the impact noise. Based on the dimensions of the wheel 60 and the housing 40, the manufacturer can set the elastic coefficient of the spring 42 and the depth of the limiting groove 61 by himself. The spring 42 is used to control the movable engagement between the limiting member 41 and the limiting groove 61, which will not interfere with the normal rotation of the wheel 60, making it easier for the wheel 60 to rotate and switch between the open valve position and the closed valve position.

[0060] Preferably, the limiting groove 61 has an inclined groove wall 611, and the limiting member 41 has an arc surface 411 that contacts and cooperates with the inclined groove wall 611; this makes it easier for the limiting member 41 to be inserted into or removed from the limiting groove 61, avoiding interference with the normal rotation of the wheel 60, making the manual diaphragm valve easier to operate and easier to switch between the open and closed states.

[0061] In this embodiment, Figure 3 As shown, the limiting member 41 is a sphere, the limiting groove 61 is a conical groove, and the depth of the limiting groove 61 is less than one-fourth of the diameter of the sphere of the limiting member 41, that is, only the top of the sphere is stuck in the limiting groove 61, and collides with the inner wall of the limiting groove 61 to make a sound, making it easier for the limiting member 41 to move out of the limiting groove 61. At the same time, most of the limiting member 41 is located in the mounting groove 43, which better controls the range of movement of the limiting member 41, prevents the limiting member 41 from detaching from the mounting groove 43, and enables it to move only along the axial direction of the mounting groove 43, ensuring the active connection between the limiting member 41 and the limiting groove 61.

[0062] like Figure 3 and Figure 5 As shown, the second limiting portion of this embodiment further includes a mounting seat 44 inserted into the mounting groove 43. The mounting seat 44 has a cavity 441 for accommodating the spring 42 and the limiting member 41. The top surface of the mounting seat 44 is provided with an opening 442 communicating with the cavity 441. Under the action of the spring 42, the limiting member 41 can be at least partially exposed through the opening 442 to collide with and flexibly engage with the limiting groove 61. The mounting seat 44 limits and guides the spring 42 and the limiting member 41, ensuring that the limiting member 41 moves axially and accurately collides with and flexibly engages with the limiting groove 61.

[0063] like Figure 4As shown, the runner 60 has a notch 62, and the runner 60 includes two stop surfaces 621, and the circumferential side surfaces of the notch 62 are respectively formed as two stop surfaces 621; the shell 40 is also provided with a stop portion that cooperates with the stop surface 621, and the stop portion is located in the notch 62. The runner 60 rotates along the first direction to the valve-opening position, and the stop portion abuts against one of the stop surfaces 621 to prevent the runner 60 from continuing to rotate along the first direction. The runner 60 rotates along the second direction to the valve-closing position, and the stop portion abuts against the other stop surface 621 to prevent the runner 60 from continuing to rotate along the second direction. The stop surface 621 cooperates with the stop part to limit the further rotation of the wheel 60 in the original direction. Therefore, even if the operator does not hear the collision sound, the wheel 60 cannot be rotated further, and the wheel 60 is limited to the open valve position or the closed valve position, cooperating with the first limit part and the second limit part to achieve double insurance. The wheel 60 will not be easily affected by external disturbances or misoperation and be in an incorrect position.

[0064] like Figure 4 and Figure 5 As shown, the stop portion includes a pin 45 inserted into the top surface of the shell 40. The top surface of the shell 40 is provided with a slot 46. The lower end of the pin 45 is inserted into the slot 46 and fixed, and the upper end is exposed in the notch 62 and cooperates with the two stop surfaces 621 of the notch 62. The structure of the pin 45 is simple and the cost is low.

[0065] Preferably, the latch 45 is made of metal, the wheel 60 is also made of metal, and the limiter 41 is also made of metal. The metal material is specifically iron or stainless steel to ensure mechanical strength. At the same time, a prompt sound will be emitted when the latch 45 contacts the stop surface 621, which has the same prompt effect as the collision sound between the first limiter and the second limiter.

[0066] like Figure 1 and Figure 2 As shown, the actuator also includes a knob 70, which is covered on the outside of the rotating wheel 60 and fixedly connected to the rotating wheel 60. The interior of the knob 70 has a cavity 71 that accommodates and surrounds the rotating wheel 60 and the stop portion. The function of the knob 70 is to facilitate the operation of the operator and make it easier to rotate the rotating wheel 60. The knob 70 forms a cover to protect the rotating wheel 60 and the stop portion therein.

[0067] Specifically, such as Figure 2 As shown, the rotating wheel 60 includes a circular mounting post 63 located at the top, the circular mounting post 63 extends into the top of the cavity 71 of the knob 70, and the knob 70 is provided with a radially extending through hole 72, and the circular mounting post 63 is provided with a threaded hole 631. The screw passes through the through hole 72 and is threadedly connected to the threaded hole 631 on the circular mounting post 63, thereby realizing a fixed connection and synchronous rotation between the rotating wheel 60 and the knob 70.

[0068] like Figure 2As shown, the valve stem 50 includes a rotating rod 51 and a screw 52. The top end of the rotating rod 51 is fixedly connected to the rotating wheel 60, that is, when the rotating wheel 60 rotates, the rotating rod 51 is driven to rotate. The rotating rod 51 rotatably penetrates the housing 40. The screw 52 is threadedly engaged with the housing 40. The bottom end of the rotating rod 51 is circumferentially limited with the top end of the screw 52, ​​so that when the rotating rod 51 rotates, the screw 52 is driven to rotate. That is, the rotating rod 51 drives the screw 52 to rotate, and the screw 52 simultaneously moves axially, approaching or moving away from the diaphragm 30. The circumferential limit fit can be achieved by the bottom end of the rotating rod 51 being designed into a non-circular irregular shape such as a rounded rectangle or a racetrack shape, and the top end of the screw 52 is provided with a hole of a certain depth for insertion into the rounded rectangle or racetrack shape.

[0069] When the screw 52 approaches the diaphragm 30, it directly or indirectly presses the diaphragm 30, so that the diaphragm 30 is sealed with the valve seat 20, and the manual diaphragm valve is in a closed state; and when the runner 60 rotates to the valve open position, the screw 52 moves axially away from the diaphragm 30, ensuring that the first fluid channel 11 and the second fluid channel 12 are connected through the valve seat 20, and the manual diaphragm valve is in an open state; the screw 52 is used to convert the rotation of the runner 60 into axial movement. The axial movement of the screw 52 is relatively smooth and precise, corresponding to the rotation angle of the runner 60, so as to effectively ensure the sealing or separation state of the diaphragm 30 and the valve seat 20.

[0070] The screw 52 directly presses the diaphragm 30, which means that the bottom surface of the screw 52 directly contacts and presses the diaphragm 30; the screw 52 indirectly presses the diaphragm 30, which means that a diaphragm pressing member 53 is provided between the screw 52 and the diaphragm 30, and the bottom surface of the screw 52 presses the diaphragm pressing member 53, so that the diaphragm pressing member 53 directly contacts and presses the diaphragm 30. In this embodiment, Figure 2 As shown, the screw 52 indirectly presses the diaphragm 30 .

[0071] In order to ensure the fixed connection between the rotating wheel 60 and the rotating rod 51, a mounting hole 64 is opened on the bottom surface of the rotating wheel 60, and the top end of the rotating rod 51 extends into the mounting hole 64. If it is connected to the fastener 66 through a round hole, it will be difficult to align. Therefore, if Figure 2 and Figure 5 As shown, an annular groove 511 is provided on the top side of the rotating rod 51, and a radial hole 65 is provided on the side of the rotating wheel 60. The radial hole 65 is connected to the mounting hole 64. A fastener 66 is provided in the radial hole 65. Part of the end of the fastener 66 extends into the annular groove 511 and abuts against the groove wall. The rotating rod 51 can be fixed to the rotating wheel 60 without alignment, which reduces assembly difficulty and improves assembly efficiency. At the same time, the annular groove 511 and the fastener 66 cooperate in the axial limit position, and the rotating rod 51 cannot move in the axial direction, ensuring the firmness of the rotating rod 51. The fastener 66 can be a bolt, a screw, or a rivet.

[0072] Furthermore, if Figure 5 As shown, the rotating rod 51 is provided with a limiting collar 512 located between the top surface of the shell 40 and the rotating wheel 60. The limiting collar 512 is sleeved on the rotating rod 51 and the two can rotate relative to each other. The part of the rotating rod 51 extending into the inner side of the shell 40 is in rotational friction contact with the inner wall of the shell 40 through the O-ring; the function of the limiting collar 512 is also to prevent the rotating rod 51 from moving axially; and the rotational friction contact between the rotating rod 51 and the inner wall of the shell 40 can enhance the feel of the rotating wheel 60 when rotating, and cooperate with the first limiting part and the second limiting part to increase the friction force between the rotating rod 51 and the rotating wheel 60 when rotating, thereby preventing the rotating wheel 60 from rotating too fast; at the same time, it can also play a role in radial limiting the rotating rod 51 to prevent the rotating rod 51 from shaking left and right or back and forth.

[0073] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A manual diaphragm valve, comprising: A valve body having a first fluid passage and a second fluid passage; a valve seat, disposed on the valve body and surrounding an outer peripheral side of a top end of the first fluid channel, wherein the first fluid channel is connected to the second fluid channel via the valve seat; a diaphragm, elastically deformable and sealingly disposed above the valve seat; The actuator is connected to the top of the valve body and is characterized by: The actuator includes a housing, a valve stem passing through the housing, and a rotor located above the housing. The rotor is fixedly connected to the valve stem. The rotor rotates to drive the valve stem to rotate. The rotor has a valve-opening position and a valve-closing position. When the rotor is in the valve-opening position, the diaphragm is separated from the valve seat to open the diaphragm valve. When the rotor is in the valve-closing position, the valve stem drives the diaphragm to abut against the valve seat to isolate the diaphragm valve. One of the rotating wheel and the housing is provided with two first limiting parts, and the other is provided with a second limiting part cooperating with the first limiting part. When the rotating wheel rotates along a first direction to the valve opening position, the second limiting part collides with one of the first limiting parts and is movably engaged. When the rotating wheel rotates along a second direction opposite to the first direction to the valve closing position, the second limiting part collides with the other first limiting part and is movably engaged.

2. The manual diaphragm valve according to claim 1, characterized in that: The two first limiting portions are two limiting grooves spaced apart on the bottom surface of the rotating wheel; A mounting groove is provided on the top surface of the shell, and the second limiting portion includes a limiting member axially movably arranged in the mounting groove and a spring located axially below the limiting member. The limiting member elastically presses against the spring, and the spring generates an axial thrust force on the limiting member, so that the limiting member collides with the limiting groove and is movably engaged.

3. The manual diaphragm valve according to claim 2, characterized in that: The limiting groove has an inclined groove wall, and the limiting member has an arc surface that contacts and cooperates with the inclined groove wall.

4. The manual diaphragm valve according to claim 2, characterized in that: The second limiting portion also includes a mounting seat inserted in the mounting groove, the mounting seat having a cavity for accommodating the spring and the limiting member, the top surface of the mounting seat being provided with an opening communicating with the cavity, and the limiting member being able to be at least partially exposed from the opening under the action of the spring to collide with the limiting groove and be movably engaged.

5. The manual diaphragm valve according to claim 1, characterized in that: The runner includes two stop surfaces, the runner has a notch, and the two circumferential side surfaces of the notch are respectively formed as the two stop surfaces; The housing is further provided with a stop portion that cooperates with the stop surface. When the wheel rotates along the first direction to the valve-opening position, the stop portion abuts against one of the stop surfaces to prevent the wheel from continuing to rotate along the first direction. When the wheel rotates along the second direction to the valve-closing position, the stop portion abuts against the other stop surface to prevent the wheel from continuing to rotate along the second direction.

6. The manual diaphragm valve according to claim 5, characterized in that: The stopping portion includes a latch inserted into the top surface of the shell, and the latch is exposed in the notch.

7. The manual diaphragm valve according to claim 5, characterized in that: The actuator further includes a knob, wherein the knob cover is arranged on the outside of the rotating wheel and is fixedly connected to the rotating wheel, and the interior of the knob has a cavity for accommodating and surrounding the rotating wheel and the stopper.

8. The manual diaphragm valve according to claim 1, wherein: The valve stem includes a rotating rod and a screw rod. The top end of the rotating rod is fixedly connected to the rotating wheel. The rotating rod can rotatably pass through the shell. The screw rod is threadedly engaged with the shell. The bottom end of the rotating rod is circumferentially limited with the top end of the screw rod, so that when the rotating rod rotates, the screw rod is driven to rotate, and the screw rod directly or indirectly presses the diaphragm.

9. The manual diaphragm valve according to claim 8, characterized in that: A mounting hole is provided on the bottom surface of the rotating wheel, the top end of the rotating rod extends into the mounting hole, and an annular groove is provided on the side surface of the top end of the rotating rod. A radial hole is provided on the side surface of the rotating wheel, and the radial hole is connected to the mounting hole. A fastener is provided in the radial hole, and a part of the end of the fastener extends into the annular groove and is tightly pressed against the groove wall.

10. The manual diaphragm valve according to claim 8, wherein: The rotating rod is provided with a limit collar located between the top surface of the shell and the rotating wheel. The limit collar is sleeved on the rotating rod and the two can rotate relative to each other. The part of the rotating rod extending into the inner side of the shell is in rotational friction contact with the inner wall of the shell through an O-ring.

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