Equipment for preventing normally open solenoid valve diaphragm from being damaged

Abstract

The present disclosure provides an apparatus for preventing damage to a diaphragm of a normally open solenoid valve, including a bonnet having a central bore therethrough, the central bore being disposed between a water inlet portion through which water is introduced and a water outlet portion through which water is discharged, the central bore being configured as a central passage through which water flows, and a valve cover disposed on the valve body and configured to be adjustable by opening or closing the diaphragm so as to selectively discharge water introduced into the water inlet portion to the water outlet portion, one side of the valve cover being provided with a square hole formed through the valve cover, a passage configured to communicate with a space in which the diaphragm is mounted, and a pressure transmission prevention device mounted in an inlet region of the square hole, the pressure generated by the fluid is prevented from being transmitted to the diaphragm, so that the diaphragm is prevented from being damaged by the pressure applied to the diaphragm by the fluid which is introduced from the central hole and passes through the square hole, and the diaphragm is prevented from being expanded and damaged by the pressure applied to the diaphragm when back pressure is generated in the normally open electromagnetic valve during operation.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority from Korean Patent Application No. 10-2024-0016919 filed on February 2, 2024, in the Korean Intellectual Property Office, and Korean Patent Application No. 10-2024-0191584 filed on December 19, 2024, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a device for preventing the diaphragm of a normally open solenoid valve from being damaged, and more specifically, to a device for preventing the diaphragm of a normally open solenoid valve from being damaged, which can prevent the diaphragm from being compressed, expanded, and damaged by the back pressure generated when the normally open solenoid valve is in operation. Background Art

[0004] Figure 1 is a perspective view showing a structure in which a diaphragm is expanded and broken by a back pressure generated in a normally open solenoid valve in the related art.

[0005] like Figure 1 As shown in A, the normally open solenoid valve in the related art has a valve cover 2, which has a central hole 2a formed through the valve cover 2, and the central hole 2a has a water inlet portion, through which water is introduced, and a water outlet portion, through which the introduced water is discharged, and is configured as a central channel through which water flows, and the valve cover 2 has a square hole 2b formed through the valve cover 2, the square hole 2b is arranged on one side of the valve cover 2, and is configured as a channel, which is configured to communicate with the space where the diaphragm 1 is installed.

[0006] Furthermore, the valve cover 2 is equipped with a plunger 4, which is mounted between the water inlet and outlet and is configured to move upward or downward. The plunger 4 is configured to selectively open or close the central hole 2a when moving upward or downward, allowing water introduced through the water inlet to be selectively discharged through the water outlet. A plunger guide 5 is mounted on the valve cover 2 and is configured to guide the upward and downward movement of the plunger 4.

[0007] In addition, a membrane 1 made of a flexible material is installed on one side of the space communicating with the square hole 2b to separate the water inlet and the water outlet.

[0008] However, if Figure 1 As shown in Figure B, in a normally open solenoid valve with the above-mentioned structure in the related art, when fluid flows in the reverse direction through the center hole 2a, the reverse-flowing fluid can enter the space where the diaphragm 1 is mounted through the square hole 2b, exerting back pressure on the diaphragm 1. When this back pressure acts on the diaphragm 1, the diaphragm 1 may expand and break. However, there is currently no structure that can prevent the diaphragm 1 from breaking when back pressure is generated. Summary of the Invention

[0009] The present disclosure aims to provide a device for preventing the diaphragm of a normally open solenoid valve from being damaged. When a back pressure is generated in the normally open solenoid valve during operation, the device can prevent the diaphragm from expanding and being damaged due to pressure.

[0010] In order to achieve the above-mentioned objectives, the present disclosure provides a device for preventing the diaphragm of a normally open solenoid valve from being damaged, the device comprising: a valve cover having a central hole passing through the valve cover, the central hole being arranged between a water inlet part and a water outlet part, wherein water is introduced through the water inlet part and discharged through the water outlet part, the central hole being configured as a central channel for water to flow through, and being configured to be adjusted by opening or closing the diaphragm so that water introduced into the water inlet part is selectively discharged to the water outlet part, the valve cover having a square hole arranged on one side thereof, the square hole being formed through the valve cover and being configured as a channel communicating with the space where the diaphragm is installed; and a pressure transmission prevention device, installed in the inlet area of the square hole, configured to prevent the pressure generated by the fluid from being transmitted to the diaphragm, so as to prevent the diaphragm from being damaged by the pressure applied to the diaphragm by the fluid introduced through the central hole and passing through the square hole.

[0011] In this case, the pressure transmission prevention device may include: a baffle, including a plate-like member, which is configured to move upward or downward so as to selectively contact the peripheral edge portion of the square hole, and whose diameter is relatively larger than the diameter of the square hole, and an extension member extending from the lower part of the plate-like member to a predetermined length, which is configured to be inserted into the square hole and has a connecting space; and a baffle guide installed above the baffle, which is configured to guide and limit the up and down movement of the baffle.

[0012] Furthermore, the communication space may be formed by partially cutting the side surface of the extension member in the height direction so that a portion of the square hole is opened when the plate-like member is separated from the peripheral edge portion of the square hole.

[0013] In addition, the cross section of the extension member may be formed in a "+" shape having a width such that the front, rear, left, and right surfaces of the extension member may contact the square hole.

[0014] In addition, the baffle guide may include: a support member having a predetermined height, which is configured to contact and be supported on the upper peripheral surface of the square hole around the peripheral edge portion of the baffle; and a limiting member arranged at the upper end of the support member, which is configured to limit the height of the baffle moving upward or downward.

[0015] Furthermore, the height of the support member formed on the barrier guide may be relatively smaller than the length of the extension member.

[0016] Furthermore, the height of the limiting member may be set to a height that allows the limiting member to contact a lower surface of the plunger guide coupled to the upper surface of the valve cover to prevent accidental movement.

[0017] Furthermore, the outer diameter of the baffle guide may be formed to be equal to the inner diameter of the valve cover, and the baffle guide may be configured as a cylindrical member having a guide groove recessed into a lower surface thereof so that the baffle can be selectively inserted into the guide groove.

[0018] Furthermore, the height of the guide groove may be relatively smaller than the height of the extension member.

[0019] The height of the baffle guide may be set to a certain thickness so that the baffle guide can contact a lower surface of a plunger guide coupled to an upper surface of the valve cover to prevent accidental movement.

[0020] Furthermore, a separate guide filler may be installed between the periphery of the lower central region of the baffle guide and the peripheral edge portion of the central hole formed in the valve cover.

[0021] In addition, the pressure transmission prevention device may include: a fixing part fixed to one side of the peripheral edge part of the square hole; and a cover part integrated into the fixing part, which has a lower surface and is configured to selectively contact or separate from the peripheral edge part of the square hole according to the direction of the applied pressure.

[0022] Furthermore, inwardly cut grooves may be provided on two opposite sides of a boundary region between the fixing portion and the cover portion.

[0023] Furthermore, the sealing member may protrude from the lower surface of the cover portion by a predetermined length, and when the cover portion contacts the peripheral edge portion of the square hole, the sealing member may be inserted into the square hole and contact the peripheral edge portion of the inner surface of the square hole.

[0024] The fixing rib may extend from one side of a lower surface of the plunger guide coupled to the upper surface of the valve cover, and the fixing rib may press and fix the upper surface of the fixing portion when the plunger guide is coupled to the upper surface of the valve cover.

[0025] Furthermore, the fixing portion may be formed in a ring shape, and the fixing rib may be provided as a plurality of fixing ribs protruding from a plurality of points along the ring shape to press the fixing portion at the plurality of points.

[0026] As described above, the apparatus for preventing the diaphragm of a normally-open solenoid valve from being damaged according to the present disclosure can prevent the diaphragm from expanding and being damaged due to the back pressure generated when the normally-open solenoid valve is in operation.

[0027] In addition, the device for preventing the diaphragm of a normally open solenoid valve from being damaged according to the present invention is realized by a simple structure installed on the peripheral edge portion of the square hole, which is configured not to hinder the flow of fluid when positive pressure is generated and to accurately prevent the back pressure from being transmitted to the diaphragm when back pressure is generated, so that the device for preventing the diaphragm of a normally open solenoid valve from being damaged according to the present invention can be installed quickly and easily. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is a perspective view showing a structure in which a diaphragm is expanded and broken by a back pressure generated in a normally open solenoid valve in the related art.

[0029] Figure 2 1 is a perspective view illustrating a structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged, installed according to a first embodiment of the present disclosure.

[0030] Figure 3 1 is a sectional perspective view illustrating a disassembled structure of the apparatus for preventing damage to the diaphragm of a normally open solenoid valve according to the first embodiment of the present disclosure.

[0031] Figure 4 1 is a perspective view illustrating a structure of a baffle of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged according to a first embodiment of the present disclosure.

[0032] Figure 5 1 is a perspective view illustrating a structure of a baffle guide of an apparatus for preventing breakage of a diaphragm of a normally open solenoid valve according to a first embodiment of the present disclosure.

[0033] Figure 6 2 is an operation diagram illustrating the operation of the apparatus for preventing diaphragm breakage of a normally open solenoid valve according to the first embodiment of the present disclosure.

[0034] Figure 7 2 is a perspective view illustrating a structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged, installed according to a second embodiment of the present disclosure.

[0035] Figure 8 is a sectional perspective view illustrating a disassembled structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged according to a second embodiment of the present disclosure.

[0036] Figure 9 2 is an operation diagram illustrating the operation of the apparatus for preventing diaphragm breakage of a normally open solenoid valve installed according to the second embodiment of the present disclosure.

[0037] Figure 10 1 is a perspective view illustrating a structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged, installed according to a third embodiment of the present disclosure.

[0038] Figure 11 1 is a perspective view illustrating a structure of a baffle of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged according to a third embodiment of the present disclosure.

[0039] Figure 12 1 is a perspective view illustrating a structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged, installed according to a fourth embodiment of the present disclosure.

[0040] Figure 13 1 is a perspective view illustrating a structure of a baffle of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged according to a fourth embodiment of the present disclosure.

[0041] Figure 14 1 is a perspective view illustrating a structure of a plunger guide of an apparatus for preventing breakage of a diaphragm of a normally open solenoid valve according to a fourth embodiment of the present disclosure. DETAILED DESCRIPTION

[0042] Hereinafter, an energy generating device according to an embodiment of the present disclosure will be described in more detail with reference to the accompanying drawings.

[0043] However, the technical spirit of the present disclosure is not limited to the embodiments described herein, but can be implemented in various forms. Within the scope of the technical spirit of the present disclosure, one or more constituent elements in the embodiments can be selectively combined and replaced.

[0044] In addition, unless otherwise specifically and clearly defined or explained, the terms (including technical and scientific terms) used in the embodiments of the present disclosure are to be understood as those commonly understood by those skilled in the art to which the present disclosure belongs. Common terms, such as terms defined in dictionaries, are to be interpreted according to the context of the relevant technology.

[0045] In addition, the terms used in the embodiments of the present disclosure are for explaining the embodiments rather than for limiting the present disclosure.

[0046] In this specification, unless otherwise specified, the singular form may also include the plural form. When expressing "at least one (or one or more) of A, B and C", it may include one or more of all combinations of A, B and C.

[0047] Furthermore, terms such as first, second, A, B, (a), and (b) may be used to describe constituent elements of the embodiments of the present disclosure.

[0048] These terms are only used to distinguish one component from another, and the nature, sequence or order of the components are not limited by these terms.

[0049] In addition, when one element is described as being “connected,” “coupled,” or “attached” to another element, the one element may be directly connected, coupled, or attached to the other element or may be connected, coupled, or attached to the other element through another intervening element.

[0050] Furthermore, the expression "a component is disposed above (upper) or below (lower) another component" includes not only a case where the two components are in direct contact, but also a case where one or more other components are disposed or arranged between the two components. The expression "above (upper) or below (lower)" can refer to both a downward direction and an upward direction based on one component.

[0051] Figure 2 is a perspective view showing the structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged, installed according to a first embodiment of the present disclosure, Figure 3 is a sectional perspective view showing the structure of the device for preventing the diaphragm of a normally open solenoid valve from being damaged when disassembled according to the first embodiment of the present disclosure, Figure 4 is a perspective view showing the structure of a baffle of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged according to a first embodiment of the present disclosure, Figure 5 is a perspective view showing the structure of a baffle guide of an apparatus for preventing damage to a diaphragm of a normally open solenoid valve according to a first embodiment of the present disclosure, Figure 6 is an operation diagram illustrating the operation of the apparatus for preventing the diaphragm of a normally open solenoid valve from being damaged according to the first embodiment of the present disclosure, Figure 7 is a perspective view showing the structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged, installed according to a second embodiment of the present disclosure, Figure 8 is a sectional perspective view showing the structure of a device for preventing a normally open solenoid valve diaphragm from being damaged according to a second embodiment of the present disclosure, Figure 9 is an operation diagram illustrating the operation of the apparatus for preventing the diaphragm of a normally open solenoid valve from being damaged, installed according to the second embodiment of the present disclosure, Figure 10 is a perspective view showing the structure of an apparatus for preventing a normally open solenoid valve diaphragm from being damaged, installed according to a third embodiment of the present disclosure, Figure 11 is a perspective view showing a structure of a baffle of an apparatus for preventing a normally open solenoid valve diaphragm from being damaged according to a third embodiment of the present disclosure, Figure 12 is a perspective view showing the structure of an apparatus for preventing a diaphragm of a normally open solenoid valve from being damaged, installed according to a fourth embodiment of the present disclosure, Figure 13 is a perspective view showing the structure of a baffle of an apparatus for preventing damage to a diaphragm of a normally open solenoid valve according to a fourth embodiment of the present disclosure, and Figure 141 is a perspective view illustrating a structure of a plunger guide of an apparatus for preventing breakage of a diaphragm of a normally open solenoid valve according to a fourth embodiment of the present disclosure.

[0052] As shown in the figure, the device for preventing diaphragm rupture of a normally open solenoid valve according to the present disclosure includes a valve cover 2, which has a central hole 2a formed through the valve cover 2. The central hole 2a is arranged between a water inlet portion and a water outlet portion, wherein water is introduced through the water inlet portion and discharged through the water outlet portion. The central hole is configured as a central channel for water flow and is configured to be adjusted by opening or closing the diaphragm 1 so that water introduced into the water inlet portion is selectively discharged to the water outlet portion. The valve cover 2 has a square hole 2b, which is arranged on one side of the valve cover 2, formed through the valve cover 2, and configured as a channel communicating with the space in which the diaphragm 1 is installed. According to the present disclosure, the device for preventing diaphragm rupture of a normally open solenoid valve includes a pressure transmission prevention device 100 installed in the inlet area of the square hole 2b. The pressure transmission prevention device 100 is configured to prevent the pressure generated by the fluid from being transmitted to the diaphragm 1, thereby preventing the diaphragm 1 from rupturing due to the pressure applied to the diaphragm 1 by the fluid introduced through the central hole 2a and passing through the square hole 2b.

[0053] like Figures 2 to 9 As shown, the pressure transmission prevention device 100 according to the first and second embodiments of the present disclosure may include a baffle 110, which includes a plate-like member 111, which is configured to move upward or downward so as to selectively contact the peripheral edge portion of the square hole 2b, and its diameter is relatively larger than the diameter of the square hole 2b, and an extension member 112 extending a predetermined length from the lower part of the plate-like member 111, which is configured to be inserted into the square hole 2b and has a connecting space 112a, and a baffle guide 120 or 130 installed above the baffle 110, which is configured to guide and limit the up and down movement of the baffle 110.

[0054] According to the first embodiment of the present disclosure, the baffle 110 of the pressure transmission prevention device 100 is installed in the square hole 2b formed on one side of the valve cover 2, and is used to prevent pressure from being transmitted to the diaphragm 1 through the square hole 2b when back pressure is generated.

[0055] The pressure transmission prevention device 100 generally includes a baffle 110 and a baffle guide 120 installed above the baffle 110 .

[0056] like Figure 4As shown, the baffle 110 includes a plate-like member 111, which is configured to move upward or downward so as to selectively contact the peripheral edge portion of the square hole 2b, and whose diameter is relatively larger than the diameter of the square hole 2b; and an extension member 112, which extends a predetermined length from the lower portion of the plate-like member 111, is configured to be inserted into the square hole 2b, and has a connecting space 112a.

[0057] The plate member 111 is formed in a disk shape and selectively contacts the peripheral edge portion of the square hole 2b when the baffle 110 moves upward or downward, thereby substantially preventing back pressure from being transmitted to the diaphragm 1 through the square hole 2b.

[0058] For this purpose, it is effective that the plate-like member 111 is formed to have an area sufficient to block the entire upper side of the square hole 2b from the outside.

[0059] The extension member 112 is a member integral with the plate member 111 and extending downward by a predetermined length. The extension member 112 may have a communication space 112a formed on one side thereof so that when positive pressure is applied, when the plate member 111 is separated from the peripheral edge portion of the square hole 2b, fluid can flow through the square hole 2b.

[0060] The communication space 112a may be formed by partially cutting the side surface of the extension member 112 in the height direction so that a portion of the square hole 2b is opened when the plate-like member 111 is separated from the peripheral edge portion of the square hole 2b.

[0061] According to the first embodiment of the present disclosure, the extension member 112 constituting the pressure transmission prevention means has a "+"-shaped cross section. Effectively, the extension member 112 has a certain width so that the front, rear, left, and right surfaces of the extension member 112 all contact the square hole 2b, so that when the baffle 110 moves upward or downward, the extension member 112 does not move unexpectedly.

[0062] like Figure 5 As shown, the baffle guide 120 may include supporting members 121, each of which has a predetermined height and is configured to contact the upper peripheral surface of the square hole 2b surrounding the peripheral edge portion of the baffle 110 and be supported on the upper peripheral surface; and a limiting member 122, which is arranged at the upper end of the supporting member 121 and is configured to limit the height of the baffle 110 moving upward or downward.

[0063] The support members 121 may be arranged to face each other and spaced apart from each other so that the baffle 110 can be placed inside the support members 121. Two pairs of support members 121 may be installed at each of the front, rear, left, and right sides. The height of the support members 121 may be relatively smaller than the length of the extension member 112.

[0064] Since the height of the supporting member 121 is relatively smaller than the length of the extending member 112 , when the baffle 110 moves upward or downward, the supporting member 121 can be prevented from being separated from the square hole 2 b.

[0065] Furthermore, it is effective to set the height of the limiting member 122 to a height that allows the limiting member 122 to contact and press the lower surface of the plunger guide 3 coupled to the upper surface of the bonnet 2 , thereby preventing the entire flapper guide 120 from accidentally moving.

[0066] Since the baffle 110 according to the second embodiment of the present disclosure is identical in shape to the baffle 110 according to the first embodiment of the present disclosure, a detailed description thereof will be omitted.

[0067] like Figures 7 to 9 As shown, the baffle guide 130 according to the second embodiment of the present disclosure can be configured as a cylindrical member whose outer diameter is equal to the inner diameter of the valve cover 2 and has a guide groove 131 recessed into the lower surface of the baffle guide 130 so that the baffle 110 can be selectively inserted into the guide groove 131.

[0068] The baffle guide 130 according to the second embodiment of the present disclosure is installed by being inserted into the inner diameter portion formed in the valve cover 2 , which can prevent the baffle 110 from being completely separated from the square hole 2 b and limit the height of the baffle 110 moving upward or downward.

[0069] To this end, the height of the guide groove 131 formed in the baffle guide 130 is relatively smaller than the height of the extension member 112, so that the baffle 110 can be prevented from being completely separated from the square hole 2b and the height of the baffle 110 moving upward or downward can be limited.

[0070] Furthermore, it is effective to set the height of the baffle guide 130 to a certain thickness so that the baffle guide 130 can contact the lower surface of the plunger guide 3 coupled to the upper surface of the valve cover 2 , thereby preventing the baffle guide 130 from accidentally moving.

[0071] In addition, a separate guide filler 132 may be installed between the periphery of the lower central area of the baffle guide 130 and the peripheral edge portion of the central hole 2a formed in the valve cover 2, thereby preventing the fluid flowing through the central hole 2a from leaking to the outside through the gap between the central hole 2a and the baffle guide 130.

[0072] The operation process of the apparatus for preventing the diaphragm of a normally open solenoid valve from being damaged according to the first and second embodiments of the present disclosure will be described below with reference to Figure 6 and 9 to describe.

[0073] Preferably, if Figure 6As shown in Figures 9B and 9B, if forward pressure is applied to the normally open solenoid valve, the fluid passing through the solenoid valve flows upward through the square hole 2b, and the baffle 110 moves upward under the action of the positive pressure. When the baffle 110 moves upward, the plate-like member 111 separates from the peripheral edge of the square hole 2b, allowing the communication space 112a to open, and the fluid can flow through the communication space 112a and be discharged through the outlet portion.

[0074] In this case, the baffle guide 120 or 130 installed above the baffle 110 can limit the height of the baffle 110 moving upward or downward, thereby preventing the baffle 110 from being completely separated from the square hole 2b and stably guiding the movement of the baffle 110.

[0075] like Figure 6 As shown in Figures A and 9A, if reverse pressure is applied to the normally open solenoid valve, the fluid flowing through the solenoid valve must be prevented from flowing downward through the square hole 2b and damaging the diaphragm 1.

[0076] When back pressure is applied, baffle 110 moves downward under the action of the back pressure. As baffle 110 moves downward, plate-shaped member 111 tightly adheres to the peripheral edge of square hole 2b, completely closing square hole 2b. Therefore, the fluid cannot flow in the opposite direction, thus preventing diaphragm 1 from being damaged.

[0077] At the same time, if Figure 10 and 11 As shown, the pressure transmission prevention device 100 of the equipment for preventing the diaphragm of a normally open solenoid valve from being damaged according to the third embodiment of the present disclosure includes a fixing portion 140 fixed on one side of the peripheral edge portion of the square hole 2b, and a cover portion 150 integrated into the fixing portion 140, the cover portion 150 having a lower surface, which is configured to selectively contact or separate from the peripheral edge portion of the square hole 2b according to the direction of the applied pressure.

[0078] The fixing portion 140 is formed into a plate shape. The fixing portion 140 contacts the lower surface of the valve cover 2 at one side of the peripheral edge portion of the square hole 2b. The fixing portion 140 is secured by a fixing rib 3a. The fixing rib 3a extends from one side of the lower surface of the plunger guide 3, which is coupled to the upper surface of the valve cover 2. When the plunger guide 3 is coupled to the upper surface of the valve cover 2, the fixing rib 3a is configured to press against and secure the upper surface of the fixing portion 140.

[0079] like Figures 12 to 14 As shown, the fixing portion 140 of the apparatus for preventing damage to the diaphragm of a normally open solenoid valve according to the fourth embodiment of the present disclosure can be formed in a ring shape. A plurality of fixing ribs 3a can protrude from a plurality of points along the ring shape to press the fixing portion 140 at a plurality of points.

[0080] If the fixing portion 140 is formed in a ring shape, the initial position of the fixing portion 140 can be conveniently set when assembling the fixing portion 140. In addition, it is possible to prevent the position of the fixing portion 140 from being arbitrarily changed.

[0081] In a state where the fixing portion 140 is fixed by the fixing rib 3 a , the cover portion 150 is held in contact with the peripheral edge portion of the square hole 2 b .

[0082] In addition, it is effective that inward cut grooves 141 are provided on two opposite sides of the boundary area between the fixed portion 140 and the cover portion 150, so that when positive pressure is applied, the cover portion 150 can be easily folded relative to the fixed portion 140, the cover portion 150 can be separated from the peripheral edge portion of the square hole 2b, and the fluid can flow.

[0083] In addition, the sealing member 151 can extend a predetermined length from the lower surface of the cover portion 150. When the cover portion 150 contacts the peripheral edge portion of the square hole 2b, the sealing member 151 is inserted into the square hole 2b and contacts the periphery of the inner surface of the square hole 2b, so that the lower surface of the cover portion 150 and the entrance of the square hole 2b can be in close contact with each other.

[0084] In the device for preventing the diaphragm of a normally open solenoid valve from breaking configured according to the third and fourth embodiments of the present disclosure, when positive pressure is applied to the solenoid valve, the cover portion 150 is folded at a predetermined angle relative to the fixed portion 140, the cover portion 150 is separated from the square hole 2b, and the square hole 2b is opened so that the fluid can flow and be discharged through the outlet portion.

[0085] In addition, when back pressure is generated in the solenoid valve, the cover part 150 is tightly attached to the peripheral edge part of the upper part of the square hole 2b under the action of the back pressure, and the square hole 2b is closed, so that the back pressure will not be transmitted to the diaphragm 1, thereby preventing the diaphragm 1 from being damaged.

[0086] According to the present disclosure, the apparatus configured to prevent the diaphragm of a normally open solenoid valve from being damaged as described above can prevent the diaphragm from expanding and being damaged due to back pressure acting on the diaphragm when the normally open solenoid valve is in operation.

[0087] Although the embodiments that can be implemented by the present disclosure have been described above, these embodiments are merely illustrative and are not intended to limit the present disclosure. It will be understood by those skilled in the art that, without departing from the inherent characteristics of the present embodiment, various modifications and applications can be made to the present embodiment, even though these modifications and applications are not described above. For example, the various constituent elements specifically described in the embodiment can be modified and then executed. In addition, it should be explained that differences related to modifications and applications are included within the scope of the present disclosure as defined in the appended claims.

[0088] Reference Signs List

[0089] 1: Diaphragm

[0090] 2: Valve cover

[0091] 2a: Center hole

[0092] 2b: Square hole

[0093] 3: Plunger guide

[0094] 3a:Fixed ribs

[0095] 100:Pressure transmission prevention device

[0096] 110: Baffle

[0097] 111: Plate-like member

[0098] 112: Extension member

[0099] 120: Baffle guide

[0100] 121: Supporting member

[0101] 122: Limiting component

[0102] 130: Baffle guide

[0103] 140:Fixed part

[0104] 141: Grooving

[0105] 150: Cover part

[0106] 151: Sealing member

Claims

1. A device for preventing damage to a normally open solenoid valve diaphragm, the device comprising: a valve cover having a central hole formed therethrough, the central hole being disposed between a water inlet portion and a water outlet portion, wherein water is introduced through the water inlet portion and discharged through the water outlet portion, the central hole being configured as a central passage through which water flows and being configured to be adjusted by opening or closing a diaphragm so that water introduced into the water inlet portion is selectively discharged to the water outlet portion, the valve cover having a square hole disposed on one side of the valve cover, the square hole being formed through the valve cover and being configured as a passage communicating with a space in which the diaphragm is installed; and A pressure transmission prevention device is installed in the inlet area of the square hole, and is used to prevent the pressure generated by the fluid from being transmitted to the diaphragm, so as to prevent the diaphragm from being damaged by the pressure applied to the diaphragm by the fluid introduced from the central hole and passing through the square hole.

2. The apparatus of claim 1 , wherein the pressure transmission prevention means comprises: a baffle including a plate-shaped member configured to move upward or downward so as to selectively contact a peripheral edge portion of the square hole, the diameter of the plate-shaped member being relatively larger than the diameter of the square hole, and an extending member extending a predetermined length from a lower portion of the plate-shaped member, configured to be inserted into the square hole, and having a communicating space; as well as The baffle guide is installed above the baffle and is configured to guide and limit the up and down movement of the baffle.

3. The apparatus according to claim 2, wherein the communication space is formed by partially cutting a side surface of the extension member in a height direction so that a portion of the square hole is opened when the plate-like member is separated from a peripheral edge portion of the square hole.

4. The apparatus of claim 3 , wherein the cross-section of the extension member is in a “+” shape, and the width thereof enables the front, rear, left, and right surfaces of the extension member to contact the square hole.

5. The apparatus of claim 2, wherein the baffle guide comprises: a support member having a predetermined height, configured to be in contact with and supported on an upper peripheral surface of the square hole surrounding a peripheral edge portion of the baffle; and A limiting member is provided at the upper end of the supporting member and is used for limiting the height of the baffle moving upward or downward. 6 . The apparatus of claim 5 , wherein a height of the support member formed on the barrier guide is relatively smaller than a length of the extending member.

7. The apparatus of claim 5, wherein a height of the stopper member is set to allow the stopper member to contact a lower surface of a plunger guide coupled to an upper surface of the valve cover to prevent accidental movement.

8. The apparatus of claim 2, wherein the outer diameter of the baffle guide is equal to the inner diameter of the valve cover, and the baffle guide is configured as a cylindrical member having a guide groove recessed into a lower surface thereof so that the baffle can be selectively inserted into the guide groove.

9. The apparatus of claim 8, wherein a height of the guide groove is relatively smaller than a height of the extension member.

10. The apparatus of claim 8, wherein a height of the baffle guide is set to a certain thickness so that the baffle guide can contact a lower surface of a plunger guide coupled to an upper surface of the valve cover to prevent accidental movement.

11. The apparatus of claim 8, wherein a separate guide filler is installed between a periphery of a lower central region of the baffle guide and a peripheral edge portion of the central hole formed in the valve cover.

12. The apparatus of claim 2, wherein the pressure transmission prevention means comprises: a fixing portion fixed to one side of the peripheral edge portion of the square hole; as well as A lower surface of a cover portion integrated into the fixing portion is configured to selectively contact or separate from a peripheral edge portion of the square hole according to a direction of applied pressure.

13. The apparatus of claim 12, wherein inwardly cut grooves are provided at two opposite sides of a boundary region between the fixing portion and the cover portion.

14. The apparatus of claim 12, wherein a sealing member extends a predetermined length from a lower surface of the cover member, the sealing member is inserted into the square hole, and when the cover member contacts a peripheral edge portion of the square hole, the sealing member contacts the periphery of the inner surface of the square hole.

15. The apparatus of claim 12, wherein a fixing rib extends from one side of a lower surface of a plunger guide coupled to an upper surface of the valve cover, and when the plunger guide is coupled to the upper surface of the valve cover, the fixing rib presses and fixes an upper surface of the fixing portion.

16. The apparatus of claim 15, wherein the fixing portion is formed in a ring shape, and the fixing ribs are provided as a plurality of fixing ribs extending from a plurality of points along the ring shape to press the fixing portion at the plurality of points.

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