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 utility model relates to a valve, in particular to a diaphragm valve with position limiting protection for controlling fluids such as chemical solutions and water. Background Art

[0002] Many manufacturing processes, such as when pharmaceutical factories produce drugs or when semiconductor factories coat wafer surfaces to form a uniform film thickness, require controlled amounts of chemical solutions or water. Consequently, precision valves are essential in many industries. Diaphragm valves separate the control element from the liquid via a diaphragm, protecting the control element above the diaphragm from corrosion. However, valves are delicate and easily damaged by excessive forces generated by overactuation. In particular, damage to the diaphragm seal can cause leakage and inaccurate flow control. Therefore, a valve that can resist overactuation is needed. Utility Model Content

[0003] The utility model provides a diaphragm valve with position limiting protection which can prevent over-driving, so as to accurately control the depth of a driving element and prevent the valve from being damaged.

[0004] One aspect of the present invention provides a diaphragm valve comprising 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 mounted inside the controller, and the inner shell has a through hole for accommodating a portion of the drive rod. The body includes an opening and a chamber. The opening is covered by the controller. The diaphragm moves within the chamber, wherein the diaphragm blocks the chamber when it 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 configured to be fixed to a position on the drive rod to prevent the drive rod from being overdriven.

[0005] Another aspect of the present invention provides a diaphragm valve including a controller and a main 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 the middle section of the drive rod has a piston. The cylinder covers the controller. The pneumatic hole moves the drive rod by pumping air into the space between the cylinder and the piston or discharging air from the space between the cylinder and the piston. The main body includes an opening and a chamber. The opening is covered by the controller. The diaphragm moves in the chamber, and the chamber is blocked by the diaphragm driven to the bottom of the chamber. A limiting element is mounted 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 can be adjusted to set the length of the section of the drive rod to prevent the drive rod from being overdriven.

[0006] Another aspect of the present application provides a diaphragm valve comprising a controller and a body. The controller comprises a drive rod, a diaphragm, and an inner housing. The drive rod is driven to move the diaphragm. The inner housing is mounted inside the controller, and the inner housing has a through hole for accommodating part of the drive rod. The body comprises an opening and a chamber. The opening is covered by the controller. The chamber contains the diaphragm moving inside the chamber, wherein the chamber blocks when the diaphragm is driven to reach the bottom of the chamber. A limiting element surrounds the drive rod to accommodate a segment of the drive rod, and the limiting element is adjustable to prevent the drive rod from being overdriven.

[0007] The foregoing brief summary of the application does not specify BRIEF DESCRIPTION OF DRAWINGS

[0008] A more complete understanding of the present application can be attained by reference to the following description taken in connection with the accompanying drawings, wherein:

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

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

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

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

[0013] is an exploded view of the controller according to an embodiment of the present application; Figure 5A Figure 2 is a perspective view of a knob and a limiting element according to an embodiment of the present application;

[0014] Figure 5B Figure 5A is a perspective view of a diaphragm valve according to another embodiment of the present application;

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

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

[0017] Figure 8 ​​is a sectional view of a controller according to an embodiment of the present application; Figure 7

[0018] Figure 9 is an exploded view of a controller according to an embodiment of the present application; and Figure 7

[0019] Figure 10 is a perspective view of a bolt with markings to indicate diaphragm depth.

[0020] Symbol Explanation:

[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: gasket

[0046] 140: septum

[0047] 141: notch

[0048] 142: conical protrusion

[0049] 144: annular groove

[0050] 145: flat area

[0051] 146: flexible ring

[0052] 148: channel ring

[0053] 152: transparent cover

[0054] 154: pneumatic outlet

[0055] 156: pneumatic inlet

[0056] 160: bolt

[0057] 161: marker

[0058] 162: marker

[0059] 163: marker

[0060] 164: marker

[0061] 166: second end of bolt

[0062] 200: body

[0063] 210: opening

[0064] 220: reinforcing rib

[0065] 222: annular protrusion

[0066] 224: septum 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 DESCRIPTION

[0079] The following provides a number of different embodiments for implementing different features of the present invention. Figure references may be repeated throughout the embodiments, but this does not necessarily mean that features of one embodiment are applicable to another embodiment, even if they have the same reference. It should be understood that although the terms 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. On the contrary, 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" are intended to include the plural forms as well, unless the context indicates otherwise. It should also be understood that the terms "comprises" and "includes" in this specification are intended to refer to the stated features, integers, steps, operations, elements, or components, as well as additional features, integers, steps, operations, elements, components, or groups thereof.

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

[0081] Figure 1 It is a three-dimensional diagram of a diaphragm valve 10 according to an embodiment of the present utility model. Figure 2 yes Figure 1 A perspective view of the controller 100 of the diaphragm valve 10 is shown. Figure 3 yes Figure 1 A perspective view of the main body 200 of the diaphragm valve 10 is shown in FIG. Figure 1 As shown, the diaphragm valve 10 of the present invention includes a controller 100 and a main body 200. Figure 2 As shown, the controller 100 includes a knob 120 and a diaphragm 140. The diaphragm 140 is connected to the knob 120 and is driven by the knob 120. Figure 3 As shown, the body 200 includes an opening 210, a chamber 285, and a passage 280. The opening 210 is formed as shown in FIG. Figure 1 The controller 100 is shown covered and sealed by the threaded sleeve 126. The controller 100 is screwed into the solenoid 226 of the opening 210.

[0082] like Figure 1 and Figure 3As shown, the diaphragm valve 10 is installed between pipelines 360a and 360b. The pipelines 360a and 360b are connected to the inlet 260a and outlet 260b of the diaphragm valve 10, respectively, and the pipeline connectors 340a and 340b are installed on the solenoids 240a and 240b, respectively. In addition, the reinforcing ribs 220 strengthen the structure of the chamber 285, and the arrows 290 shown on the side indicate the direction of flow.

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

[0084] Figure 5B is based on Figure 5A 1. A perspective view of a knob 120 and a limiting element 122 of an embodiment of the present invention. 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 opening housing 121 is inserted by the limiting element 122, the limiting element 122 is configured to be fixed at a position of the driving rod 132 to prevent the driving rod 132 from being overdriven. The controller 100 is internally mounted with an inner housing 128 having a through hole for accommodating a portion of the driving rod 132. The threaded sleeve 126 surrounds the inner housing 128 and covers the opening 210 (see FIG. 1 ). 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 inserting the diaphragm 140 and a circular recess for inserting the drive rod 132. The flange 136 and the gasket 138 are installed above the diaphragm 140 and inside the inner shell 128. Optionally, the color ring 124 surrounds the upper opening of the inner shell 128. When the diaphragm 140 reaches a fully blocked state, the drive rod 132 stops moving. Figure 3In the illustrated position of the chamber 285 of the body 200 , the color ring 124 is completely covered by the knob 120 .

[0086] Figure 6 1 is a perspective view of a diaphragm valve 10a according to another embodiment of the present invention. Figure 7 yes Figure 6 As an alternative embodiment, Figure 2 The controller 100 can Figure 7 The pneumatic controller 100a shown is replaced. Figure 6 As shown, the diaphragm valve 10a includes a controller 100a and a body 200. Figure 7 As shown, the controller 100a includes a cylinder 120a and a diaphragm 140. Air is pumped and exhausted through a pneumatic outlet 154 and a pneumatic inlet 156 to actuate the diaphragm 140.

[0087] Figure 8 is based on Figure 7 a cross-sectional view of a controller of an embodiment, and Figure 9 is based on Figure 7 Exploded view of a controller of an embodiment of the present invention. 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 the space between the cylinder 120a and the piston 131 and exhausting 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. In order to stabilize the assembly, a flange 136a and a bushing 135 are installed above the diaphragm 140 and Figure 3 The main body 200 is shown as having an opening 210. 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 housing 128a is installed inside the controller 100a, wherein the inner housing 128a has a through hole for accommodating a section of the drive rod 132a. The threaded sleeve 126 surrounds the inner housing 128a and covers Figure 3The opening 210 is shown. The inner housing 128a and the housing mount 129 are connected to secure the threaded sleeve 126. The cylinder 120a is mounted on the inner housing 128a and the housing mount 129 is disposed within the opening 210. The limiting element 122a is mounted on the inner housing 128a to surround the drive rod 132a to accommodate a length of the drive rod 132a and to separate the piston 131 from the inner housing 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 can be adjusted to set the length of the drive rod 132a that is accommodated to prevent the drive rod 132a from being overdriven. To prevent leakage, a first O-ring 130a is located at the edge of the piston 131 and a 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 to indicate the depth of the diaphragm 140. The first end of the bolt 160 has the markings 161-164 and is mounted at the second end 166 on the top end of the drive rod 132a. See Figure 9 The transparent cover 152 is located over the cylinder 120a to cover the bolt 160. The markings 161-164 are different colored layers and more layers are shown in the transparent cover 152 when less of the drive rod 132a is inserted into the inner housing 128a.

[0089] In summary, the diaphragm valve described in the embodiments of the present application can precisely and accurately control fluid, which is beneficial for use in, for example, semiconductor production lines or various chemical production lines.

[0090] While the present application and its advantages have been described in detail, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application as defined by the appended claims. For example, many of the processes discussed above can be implemented in different methodologies and replaced or subsumed by other processes or combinations thereof. Moreover, the scope of the present application is not intended to be limited to the particular embodiments of the process, machine, manufacture, composition of matter, means, methods and steps described in the specification. Accordingly, the appended claims are intended to include within their scope such processes, machines, manufacture, compositions of matter, means, methods or steps.

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 restraining member surrounds the drive rod to accommodate a section of the drive rod, wherein the restraining member is fixed at a position on the drive rod to prevent the drive rod from being overdriven.

2. The diaphragm valve according to claim 1, wherein The controller also includes: a knob for rotating the drive rod, wherein the knob moves together with the drive rod, and the knob has an open housing for accommodating the restricting 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 restricting 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, wherein: Also included is a color ring surrounding an upper opening of the inner shell, wherein when the diaphragm reaches a position that completely blocks the chamber, the color ring is completely covered by the knob.

4. The diaphragm valve according to claim 2, wherein: 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 being separated 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 drive rod with a piston mounted thereon; a cylinder covering the controller; a pneumatic port 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 housing 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 housing, 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, wherein: The piston moves with the drive rod until the piston contacts the restraining element, and when the piston stops moving, the drive rod stops moving; and The inner shell has a through hole for accommodating a section of the driving rod.

7. The diaphragm valve according to claim 6, wherein: 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 provided 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, wherein: 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 housing mounted inside the controller, wherein the inner housing 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 member surrounds the drive rod to accommodate a section of the drive rod, wherein a thickness of the limiting member 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, wherein 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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