Diaphragm valve with limiting protection function

Abstract

A diaphragm valve with a limiting protection function comprises a driving rod, a diaphragm and a cavity. The chamber accommodates a diaphragm that blocks the chamber when driven to the bottom of the chamber. A restricting element surrounds the drive rod to receive a section of the drive rod, and the restricting element may be set to prevent the drive rod from being overdriven.

Description

Technical Field

[0001] The present invention relates to a valve, and more particularly to a diaphragm valve with limit protection for controlling fluids such as chemical solutions and water. Background Art

[0002] In many manufacturing processes, such as when a pharmaceutical factory produces drugs or when a semiconductor factory coats the surface of a wafer to form a thin film with a uniform thickness, it is necessary to control the amount of chemical solutions or water. Therefore, precise valves are required in many industries. The diaphragm valve separates the control element from the liquid through a diaphragm, so that the control element above the diaphragm will not be corroded by the liquid. However, the valve is very delicate and fragile, so it is easily damaged by excessive driving force due to over-driving. In particular, the diaphragm seal is damaged, which will cause leakage and inaccurate flow control. Therefore, a valve that can prevent over-driving is needed. Summary of the Invention

[0003] The present invention provides a diaphragm valve with limit protection that can prevent over-driving to precisely control the depth of the driving element and prevent valve damage.

[0004] One aspect of the present invention provides a diaphragm valve including a controller and a body. The controller includes a drive rod, a diaphragm, and an inner shell. The drive rod is driven to move the diaphragm. The inner shell is installed inside the controller and has a through-hole for accommodating a part of the drive rod. The body includes an opening and a chamber. This opening is covered by the controller. The diaphragm moves within the chamber, where the chamber is blocked when the diaphragm is driven to the bottom of the chamber. A limiting element surrounds the drive rod to accommodate a section of the drive rod, and the limiting element is configured to be fixed at a position on the drive rod to prevent the drive rod from being over-driven.

[0005] Another aspect of the present invention provides a diaphragm valve including a controller and a body. The controller includes a drive rod, a cylinder, a pneumatic hole, and a diaphragm. The drive rod is driven to move the diaphragm, and a piston is provided in the middle section of the drive rod. The cylinder covers the controller. The pneumatic hole moves the drive rod by pumping air into or discharging air from the space between the cylinder and the piston. The body includes an opening and a chamber. The opening is covered by the controller. The diaphragm moves within the chamber, and the chamber is blocked by the diaphragm driven to the bottom of the chamber. A limiting element is installed on the inner shell, surrounding the drive rod to accommodate a section of the drive rod and separating the piston from the inner shell. The thickness of the limiting element is adjustable to set the length of this section of the drive rod to prevent the drive rod from being over-driven.

[0006] Another aspect of the present invention provides a diaphragm valve including a controller and a body. The controller includes a drive rod, a diaphragm, and an inner housing. The drive rod is driven to move the diaphragm. The inner housing is installed inside the controller and has a through-hole for accommodating a part of the drive rod. The body includes an opening and a chamber. This opening is covered by the controller. The chamber contains the diaphragm that moves inside the chamber, and the chamber is blocked when the diaphragm is driven to reach the bottom of the chamber. A limiting element surrounds the drive rod to accommodate a section of the drive rod, and the limiting element is adjustable to prevent the drive rod from being over-driven.

[0007] The features and technical advantages of the present invention are broadly outlined above to better understand the embodiments of the present invention. The features and advantages of the present invention will be described below and form the subject matter of the claims of the present invention. Those skilled in the art should understand that the concepts and specific embodiments of the present invention may be modified or designed into other structures or methods for achieving the same purpose as the content of the present invention, and such equivalent structures do not depart from the spirit and scope of the present invention set forth in the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] A more complete understanding of the present invention can be obtained from the embodiments and the claims in conjunction with the drawings, wherein:

[0009] Figure 1 is a perspective view of a diaphragm valve according to an embodiment of the present invention;

[0010] Figure 2 is a perspective view of the controller of the diaphragm valve;

[0011] Figure 3 is Figure 1 a perspective view of the body of the diaphragm valve;

[0012] Figure 4 is according to Figure 2 a sectional view of the controller according to an embodiment;

[0013] Figure 5A is according to Figure 2 an exploded view of the controller according to an embodiment;

[0014] Figure 5B is according to Figure 5A a perspective view of the knob and the limiting element according to an embodiment;

[0015] Figure 6 is a perspective view of a diaphragm valve according to another embodiment of the present invention;

[0016] Figure 7 is Figure 6 a perspective view of the controller of the diaphragm valve in;

[0017] Figure 8 is according to Figure 7Cross-sectional view of the controller according to an embodiment;

[0018] Figure 9 is according to Figure 7 Exploded view of the controller according to an embodiment; and

[0019] Figure 10 is a three-dimensional view of a bolt with markings for indicating the diaphragm depth.

[0020] Symbol description:

[0021] 10: Diaphragm valve

[0022] 10a: Diaphragm valve

[0023] 100: Controller

[0024] 100a: Controller

[0025] 120: Knob

[0026] 120a: Cylinder

[0027] 121: Open housing

[0028] 122: Limiting element

[0029] 122a: Limiting element

[0030] 124: Color ring

[0031] 126: Threaded sleeve

[0032] 128: Inner housing

[0033] 128a: Inner housing

[0034] 129: Housing mount

[0035] 130: O-ring

[0036] 130a: O-ring

[0037] 130b: O-ring

[0038] 130c: O-ring

[0039] 131: Piston

[0040] 132: Drive rod

[0041] 132a: Drive rod

[0042] 133: Protruding ring

[0043] 136: Flange

[0044] 136a: Flange

[0045] 138: Washer

[0046] 140: Diaphragm

[0047] 141: Notch

[0048] 142: Conical projection

[0049] 144: Annular groove

[0050] 145: Flat area

[0051] 146: Flexible ring

[0052] 148: Grooved ring

[0053] 152: Transparent cover

[0054] 154: Pneumatic outlet

[0055] 156: Pneumatic inlet

[0056] 160: Bolt

[0057] 161: Mark

[0058] 162: Mark

[0059] 163: Mark

[0060] 164: Mark

[0061] 166: Second end of bolt

[0062] 200: Body

[0063] 210: Opening

[0064] 220: Reinforcing rib

[0065] 222: Annular projection

[0066] 224: Diaphragm mount

[0067] 226: Solenoid

[0068] 240a: Solenoid

[0069] 240b: Solenoid

[0070] 260a: Inlet

[0071] 260b: Outlet

[0072] 280: Channel

[0073] 285: Chamber

[0074] 290: Arrow

[0075] 340a: Pipeline connector

[0076] 340b: Pipeline Connector

[0077] 360a: Pipeline

[0078] 360b: Pipeline Detailed Implementation Manner

[0079] Numerous different embodiments for implementing the different features of the present invention are provided below. The schematic markings may be repeated throughout the embodiments, but this does not necessarily mean that the features of one embodiment apply to another embodiment, even if they have the same markings. It should be understood that although terms such as first, second, third, etc. may be used to describe various elements, components, regions, layers, or segments, these elements, components, regions, layers, or segments are not limited to these terms. Instead, these terms are only used to distinguish one element, component, region, layer, or segment from another region, layer, or segment. The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. As used herein, the singular forms "a", "an", and "the" also mean including the plural forms, unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and "including" in this specification mean that the stated features, wholes, steps, operations, elements, or components are included, and also mean the inclusion of additional other features, wholes, steps, operations, elements, components, or groups thereof.

[0080] The valve of the embodiment of the present invention will be described in detail below with reference to the accompanying drawings.

[0081] Figure 1 is a perspective view of the diaphragm valve 10 according to an embodiment of the present invention. Figure 2 is Figure 1 a perspective view of the controller 100 of the diaphragm valve 10 in Figure 3 is Figure 1 a perspective view of the main body 200 of the diaphragm valve 10 in Figure 1 As shown in Figure 2 As shown in Figure 3 As shown in Figure 1 The opening 210 is covered and sealed by the threaded sleeve 126 of the controller 100 as shown in

[0082] As shown in Figure 1 and Figure 3As shown, the diaphragm valve 10 is installed between pipelines 360a and 360b. Pipelines 360a and 360b are respectively connected to the inlet 260a and the outlet 260b of the diaphragm valve 10, while pipeline connectors 340a and 340b are respectively installed on the solenoids 240a and 240b. In addition, the reinforcing rib 220 strengthens the structure of the chamber 285, and the arrow 290 shown on the side indicates the direction of flow.

[0083] Figure 4 is a cross-sectional view of the controller 100 according to Figure 2 an embodiment of Figure 5A is an exploded view of the controller 100 according to Figure 2 an embodiment of. The controller 100 includes a drive rod 132 and a diaphragm 140. A knob 120 is installed on the drive rod 132 for rotating the drive rod 132, and the knob 120 moves with the drive rod 132. The drive rod 132 is driven to move a certain distance, thereby driving the diaphragm 140. The diaphragm 140 moves inside the Figure 3 chamber 285 shown. This chamber 285 is blocked by the diaphragm 140 that reaches the bottom of the chamber 285. A limiting element 122 is screwed onto and surrounds a section of the drive rod 132 to accommodate the drive rod 132. The knob 120 has an open housing 121 to accommodate the limiting element 122.

[0084] Figure 5B is a perspective view of the knob 120 and the limiting element 122 according to Figure 5A an embodiment of. The inner wall of the open housing 121 of the knob 120 has longitudinal protrusions and grooves to cooperate with the longitudinal protrusions and grooves on the outer wall of the limiting element 122.

[0085] When the open housing 121 is inserted by the limiting element 122, the limiting element 122 is configured to be fixed at a position on the drive rod 132 to prevent the drive rod 132 from being over-driven. An inner shell 128 is installed inside the controller 100, and the inner shell 128 has a through-hole for accommodating a part of the drive rod 132. A threaded sleeve 126 surrounds the inner shell 128 and covers the opening 210 (please refer to Figure 3 ). The limiting element 122 moves together with the drive rod 132 until the limiting element 122 contacts the inner shell 128. When the limiting element 122 stops moving, the drive rod 132 stops moving. Optionally, a protruding ring 133 surrounds the bottom end of the drive rod 132 to prevent the drive rod 132 from detaching from the inner shell 128. Below the drive rod 132, the connector 134 has a rod for the diaphragm 140 to insert and a circular notch for the drive rod 132 to insert. A flange 136 and a washer 138 are installed above the diaphragm 140 and inside the inner shell 128. Optionally, a color ring 124 surrounds the upper opening of the inner shell 128. When the diaphragm 140 reaches complete blockage Figure 3When at the position of the chamber 285 of the main body 200 shown, the color ring 124 is completely covered by the knob 120.

[0086] Figure 6 is a perspective view of a diaphragm valve 10a according to another embodiment of the present invention. Figure 7 is Figure 6 a perspective view of the controller 100a of the diaphragm valve 10a in Figure 2 The controller 100 of Figure 7 can be replaced by the pneumatic controller 100a shown. As Figure 6 shown, the diaphragm valve 10a includes a controller 100a and a main body 200. As Figure 7 shown, the controller 100a includes a cylinder 120a and a diaphragm 140. Air is pumped and discharged through the pneumatic outlet 154 and the pneumatic inlet 156 to drive the diaphragm 140.

[0087] Figure 8 is according to Figure 7 an embodiment of the controller, and Figure 9 is according to Figure 7 an embodiment of the controller's exploded view. In the controller 100a, the drive rod 132a has a piston 131 in the middle section. The cylinder 120a covers the controller 100a. The pneumatic outlet 154 and the pneumatic inlet 156 move the drive rod 132a by pumping air into and discharging air from the space between the cylinder 120a and the piston 131. When the drive rod 132a moves, the diaphragm 140 is driven by the drive rod 132a. To stabilize the components, the flange 136a and the bushing 135 are installed above the diaphragm 140 and Figure 3 inside the opening 210 of the main body 200 shown. The opening 210 is covered by the controller 100a. The diaphragm 140 moves inside the chamber 285, and the chamber 285 is blocked by the diaphragm 140 driven to the bottom of the chamber 285. An inner shell 128a is installed inside the controller 100a, and the inner shell 128a has a through hole for accommodating a section of the drive rod 132a. The threaded sleeve 126 surrounds the inner shell 128a and covers Figure 3The opening 210 shown. The inner shell 128a and the shell mount 129 are connected to fix the threaded sleeve 126. The cylinder 120a is mounted on the inner shell 128a, and the shell mount 129 is disposed within the opening 210. The limiting element 122a is mounted on the inner shell 128a to surround a section of the drive rod 132a to accommodate it and separate the piston 131 from the inner shell 128a. The piston 131 moves with the drive rod 132a until the piston 131 contacts the limiting element 122a. When the piston 131 stops moving, the drive rod 132a stops moving. The thickness of the limiting element 122a is adjustable to set the length of the drive rod 132a that is accommodated to prevent the drive rod 132a from being over-driven. To prevent leakage, the first O-ring 130a is located at the edge of the piston 131, and the second O-ring 130b surrounds the drive rod 132a below the piston 131.

[0088] Figure 10 is a perspective view of the bolt 160 with markings 161 - 164 thereon to indicate the depth of the diaphragm 140. The first end of the bolt 160 has the markings 161 - 164 and is mounted on the top end of the drive rod 132a with the second end 166. Refer to Figure 9 , the transparent cover 152 is located on the cylinder 120a to cover the bolt 160. The markings 161 - 164 are different color layers, and when less of the drive rod 132a is inserted into the inner shell 128a, more layers are shown in the transparent cover 152.

[0089] In summary, the diaphragm valve described in the embodiments of the present invention can perform precise and accurate fluid control and is beneficial for use in, for example, semiconductor production lines or various chemical production lines.

[0090] Although the present invention and its advantages have been described in detail, it should be understood that various changes, substitutions, and alterations can be made without departing from the spirit and scope of the present invention as defined by the claims. For example, many of the processes discussed above can be implemented in different ways and replaced by other processes or combinations thereof. In addition, the scope of the present invention is not limited to the specific embodiments of the devices, processes, compositions, means, methods, or steps described in the specification. Therefore, the appended claims are intended to embrace such devices, processes, compositions, means, methods, or steps within their scope.

Claims

1. A diaphragm valve with limit protection, characterized in that: include: A controller, comprising: a drive rod; and a diaphragm driven by the drive rod; A subject, including: an opening covered by the controller; and a chamber that accommodates the diaphragm moving therein, wherein the chamber is blocked by the diaphragm being driven to the bottom of the chamber; and A limiting element surrounds the drive rod to accommodate a section of the drive rod, wherein the limiting element is fixed at a position of the drive rod to prevent the drive rod from being overdriven.

2. The diaphragm valve according to claim 1, characterized in that: The controller also includes: a knob for rotating the drive rod, wherein the knob moves with the drive rod, and the knob has an open housing for accommodating the limiting element, and the open housing has a plurality of longitudinal protrusions and grooves on an inner wall to match the plurality of longitudinal protrusions and grooves on an outer wall of the limiting element; and An inner shell is installed inside the controller, wherein the inner shell has a through hole for accommodating a part of the driving rod.

3. The diaphragm valve according to claim 2, characterized in that: Also included is a colored ring surrounding an upper opening of the inner housing, wherein when the diaphragm reaches a position that completely blocks the chamber, the colored ring is completely covered by the knob.

4. The diaphragm valve according to claim 2, characterized in that: Also includes: a threaded sleeve surrounding the inner shell and covering the opening; a protruding ring surrounding the bottom end of the drive rod to prevent the drive rod from escaping from the inner housing; and A connector has a rod inserted into the diaphragm and a circular recess to be inserted by the drive rod.

5. A diaphragm valve with limit protection, characterized in that: include: A controller, comprising: a driving rod with a piston disposed thereon; a cylinder covering the controller; a pneumatic hole for moving the drive rod by pumping air into or exhausting air from the space between the cylinder and the piston; a diaphragm driven by the drive rod; and an inner shell installed inside the controller; A subject, including: an opening covered by the controller; and a chamber that accommodates the diaphragm moving therein, wherein the chamber is blocked by the diaphragm being driven to the bottom of the chamber; and A limiting element is mounted on an inner shell and is used to surround the driving rod to accommodate a section of the driving rod and is located between the piston and the inner shell, wherein the limiting element is fixed at a position of the driving rod to prevent the driving rod from being overdriven.

6. The diaphragm valve according to claim 5, characterized in that The piston moves with the drive rod until the piston contacts the limiting element, and when the piston stops moving, the drive rod stops moving; and The inner housing has a through hole for accommodating a section of the driving rod.

7. The diaphragm valve according to claim 6, characterized in that Also includes: a threaded sleeve surrounding the inner shell and covering the opening, wherein the inner shell and the shell mounting seat are connected to fix the threaded sleeve, the cylinder is mounted on the inner shell, and the shell mounting seat is disposed in the opening; a bolt having a first end with a plurality of markings and mounted at a second end on a top end of the drive rod; and a transparent cover, which is arranged on the cylinder and is used to cover the bolt, The multiple marks have multiple color layers, and when the driving rod is less inserted into the inner shell, more layers of the multiple color layers are displayed in the transparent cover.

8. The diaphragm valve according to claim 6, characterized in that: Also includes: a first O-ring located at an edge of the piston; and A second O-ring is positioned below the piston and surrounds the drive rod.

9. A diaphragm valve with limit protection, characterized in that: include: A controller, comprising: a driving rod; a diaphragm driven by the drive rod; and an inner shell installed inside the controller, wherein the inner shell has a through hole for accommodating a portion of the driving rod; A subject, including: an opening covered by the controller; and a chamber that accommodates the diaphragm moving therein, wherein the chamber is blocked by the diaphragm being driven to the bottom of the chamber; and A limiting element surrounds the drive rod to accommodate a section of the drive rod, wherein a thickness of the limiting element is set to set a length of the section of the drive rod to prevent the drive rod from being overdriven.

10. The diaphragm valve according to claim 9, characterized in that Also included is a protruding ring surrounding a bottom end of the driving rod to prevent the driving rod from being separated from the inner housing.

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