Non-return valve for high pressure and assembly method for the same

Abstract

The present invention relates to a high-pressure backflow prevention valve, wherein the high-pressure backflow prevention valve comprises: a body including a first passage through which fluid flows and a first coupling port; and a case member coupled to the body and including a second passage through which fluid flows and a second coupling port, wherein the first coupling port may be inserted into the second coupling port to form a joint between the outer surface of the first coupling port and the inner surface of the second coupling port.

Description

Technology Field

[0001] The present invention relates to a high-pressure backflow prevention valve and a method for assembling the same. Background Technology

[0002] Generally, a check valve refers to a valve that prevents fluid from flowing in the opposite direction. Check valves are also called non-return valves. While automatic valves are commonly equipped with actuators, check valves operate automatically without a separate driving mechanism; they prevent fluid from flowing in the opposite direction by automatically closing when the direction of the flowing fluid changes or the pressure drops.

[0003] These check valves have been used to prevent damage to machinery and equipment caused by backflow and to prevent process fluid from flowing from the main line to the branch line.

[0004] In addition, check valves have been used to prevent backflow of medication and cross-infection during the injection of contrast agents or other drugs.

[0005] Such check valves are classified according to their operating method into swing check valves, double-plate wafer check valves, single-wafer check valves, disc check valves, ball check valves, lift check valves, and Smolensky check valves.

[0006] These check valves had problems such as the potential for leakage, inability to guarantee a complete seal, and noise caused by pressure differences. Additionally, there was a problem where the valve could be damaged if the fluid flowed back rapidly.

[0007] The technology forming the background of the present invention is disclosed in Korean Registered Patent Publication No. 10-0954852. The problem to be solved

[0008] The present invention aims to solve the problems of the aforementioned conventional technology by providing a high-pressure anti-backflow valve capable of solving the problem of drug backflow during drug injection.

[0009] The present invention aims to solve the problems of the aforementioned conventional technology by providing a high-pressure backflow prevention valve capable of solving the problem of bursting or disconnection caused by the pressure of the fluid flowing inside.

[0010] However, the technical problems that the embodiments of the present invention aim to solve are not limited to the technical problems described above, and other technical problems may exist. means of solving the problem

[0011] As a technical means for achieving the above-mentioned technical problem, a backflow prevention valve according to one embodiment of the present invention comprises: a body including a first passage through which fluid flows and a first coupling port; and a case member coupled to the body and including a second passage through which fluid flows and a second coupling port, wherein the first coupling port may be provided to be inserted into the second coupling port to form a joint between the outer surface of the first coupling port and the inner surface of the second coupling port.

[0012] In addition, the body and the case member can be joined together by attaching an adhesive member along the perimeter of the joint.

[0013] Additionally, the above-mentioned backflow prevention valve further comprises a blocking member seated in the first coupling port and interposed between the first passage and the second passage, wherein the blocking member may be configured to move between the first passage and the second passage along the flow of the fluid within the first passage and the second passage.

[0014] In addition, the body and the case member may be provided as members capable of withstanding the pressure of the fluid flowing inside.

[0015] Meanwhile, a method for assembling a backflow prevention valve according to one embodiment of the present invention may include the step of preparing the body including the first passage and the first coupling port; the step of preparing the case member including the second passage and the second coupling port; and the step of inserting the first coupling port into the second coupling port.

[0016] In addition, the insertion step may be a step of forming a joint between the outer surface of the first coupling port and the inner surface of the second coupling port.

[0017] In addition, the assembly method of the above-mentioned backflow prevention valve may further include the step of joining the body and the case member by attaching an adhesive member along the perimeter of the joint.

[0018] The means for solving the problem described above are merely exemplary and should not be interpreted as intended to limit the present invention. In addition to the exemplary embodiments described above, additional embodiments may exist in the drawings and the detailed description of the invention. Effects of the invention

[0019] According to the means for solving the problem of the present invention described above, by providing a blocking member that moves along the fluid flow within the first and second passages, the drug is safely injected into the patient without flowing back when the drug is injected, thereby having the effect of preventing mutual infection.

[0020] According to the means for solving the problem of the present invention described above, by providing a body and a case member as a member capable of withstanding the pressure of a fluid flowing inside, and by attaching an adhesive member along the perimeter of the joint, it is possible to prevent bursting or disconnection due to pressure and to prevent fluid leakage.

[0021] However, the effects obtainable from this invention are not limited to those described above, and other effects may exist. Brief explanation of the drawing

[0022] FIG. 1 is a schematic three-dimensional conceptual diagram for explaining the configuration of a high-pressure backflow prevention valve according to one embodiment of the present invention. FIG. 2 is a plan view illustrating the configuration of a high-pressure backflow prevention valve according to one embodiment of the present invention. FIG. 3 is a plan view for explaining the body of a high-pressure backflow prevention valve according to one embodiment of the present invention. FIG. 4 is a plan view illustrating how a blocking member of a high-pressure backflow prevention valve according to one embodiment of the present invention is seated in a first coupling port. FIG. 5 is a three-dimensional conceptual diagram illustrating the combination of a body and a case member of a high-pressure backflow prevention valve according to one embodiment of the present invention. FIG. 6 is a drawing for explaining the assembly method of a high-pressure backflow prevention valve according to one embodiment of the present invention. Specific details for implementing the invention

[0023] Embodiments of the present invention are described below with reference to the attached drawings to enable those skilled in the art to easily implement the invention. However, the present invention may be embodied in various different forms and is not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification are denoted by similar reference numerals.

[0024] Throughout this specification, when a part is described as being "connected" to another part, this includes not only cases where they are "directly connected," but also cases where they are "electrically connected" or "indirectly connected" with other elements interposed between them.

[0025] Throughout the entire specification, when a component is described as being located "on," "on top," "on top," "under," "on bottom," or "on bottom" of another component, this includes not only cases where the component is in contact with the other component but also cases where another component exists between the two components.

[0026] Throughout this specification, when a part is described as "comprising" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but may include additional components.

[0027] The present invention relates to a backflow prevention valve for high pressure applications.

[0028] Hereinafter, a high-pressure backflow prevention valve according to one embodiment of the present invention (hereinafter referred to as ‘the valve (100)’) will be described.

[0029] FIG. 1 is a schematic three-dimensional conceptual diagram for explaining the configuration of a high-pressure backflow prevention valve according to one embodiment of the present invention, and FIG. 2 is a plan view for explaining the configuration of a high-pressure backflow prevention valve according to one embodiment of the present invention.

[0030] Referring to FIGS. 1 and FIGS. 2, the valve (100) may include a body (110) and a case member (120).

[0031] Specifically, the valve (100) may include a body (110) comprising a first passage (111) through which fluid flows and a first coupling port (112), and a case member (120) coupled to the body (110) and comprising a second passage (121) through which fluid flows and a second coupling port (122). Here, the fluid may include various fluids that require prevention of backflow during injection, such as contrast agents or other drugs. At this time, the fluid may flow from the body (110) toward the case member (120).

[0032] FIG. 3 is a plan view for explaining the body of a high-pressure backflow prevention valve according to one embodiment of the present invention.

[0033] Referring to FIG. 3, the body (110) may be provided with a first passage (111) which is a passage through which fluid can pass from the 6 o'clock to 12 o'clock direction in FIG. 3, and the first coupling port (112) may be provided with a passage through which fluid can pass.

[0034] Additionally, the first passage (111) is provided to be connected to a passage through which fluid can pass in the first coupling port (112), and through the coupling of the first coupling port (112) and the second coupling port (122) to be described later, the first passage (111) and the second passage (121) are connected so that fluid can flow from the body (110) to the case member (120) through the first passage (111) and the second passage (121).

[0035] Additionally, referring to FIGS. 1 to 3, a protrusion (not shown) may be formed in the first coupling port (112) so that a blocking member (140), which will be described later, can be seated thereon.

[0036] Additionally, referring to FIGS. 1 to 3, the outlet of the first coupling port (112) (the upper side of the first coupling port (112) in FIG. 3) may be larger than the inlet of the first passage (111) (the lower side of the first passage (111) in FIG. 3) and the outlet of the first passage (111) (the upper side of the first passage (111) in FIG. 3).

[0037] Additionally, referring to FIGS. 1 and 2, the case member (120) may be provided with a second passage (121) which is a passage through which fluid can pass from the 12 o'clock to 6 o'clock direction in FIG. 2, and the second coupling port (122) may be provided with a passage through which fluid can pass. At this time, the second passage (121) may be provided to be connected to the passage through which fluid can pass provided in the second coupling port (122). Accordingly, through the coupling of the first coupling port (112) and the second coupling port (122), the first passage (111) and the second passage (121) are connected, so that fluid can flow from the body (110) to the case member (120) through the first passage (111) and the second passage (121).

[0038] Additionally, referring to FIG. 2, the diameter of the inlet of the second coupling port (122) (upper side of the second coupling port (122) in FIG. 2) may be larger than the diameter of the inlet of the second passage (121) (upper side of the second passage (121) in FIG. 2) and the diameter of the outlet of the second passage (121) (lower side of the second passage (121) in FIG. 2). More specifically, the inner diameter of the inlet of the second coupling port (122) may be larger than the inner diameters of the inlet and outlet of the second passage (121).

[0039] Additionally, referring to FIG. 2, the diameter of the inlet of the second coupling port (122) (the upper side of the second coupling port (122) in FIG. 2) may be larger than the diameter of the outlet of the first coupling port (112) (the lower side of the first coupling port (112) in FIG. 2) so that the first coupling port (112) can be inserted into the second coupling port (122). More specifically, the inner diameter of the inlet of the second coupling port (122) may be understood to be larger than the outer diameter of the outlet of the first coupling port (112) to a certain degree (enough to form a joint by an adhesive member), or to correspond to the outer diameter of the outlet of the coupling port (112) so that the first coupling port (112) can be inserted into the second coupling port (122).

[0040] Accordingly, the first coupling port (112) may be inserted into the second coupling port (122) to form a joint (130) between the outer surface of the first coupling port (112) and the inner surface of the second coupling port (122). At this time, the first passage (111) and the second passage (121) are connected to each other so that fluid can flow from the body (110) to the case member (120).

[0041] Specifically, referring to FIG. 2, the first coupling port (112) is provided with a concave coupling portion of the first coupling port (112) that is recessed upward, and the second coupling port (122) may be provided with a convex coupling portion of the second coupling port (122) that is protruded upward. Additionally, the coupling portion of the first coupling port (112) may be provided to be connected to the first passage (111), and the coupling portion of the second coupling port (122) may be provided to be connected to the second passage (121). At this time, as the first coupling port (112) is inserted into the second coupling port (122), the coupling portion of the second coupling port (122) is inserted into the coupling portion of the first coupling port (112), so that the first passage (111) and the second passage (121) can be connected to each other.

[0042] Additionally, the first coupling port (112) may be inserted into the second coupling port (122) to form a joint (130) between the outer surface of the first coupling port (112) and the inner surface of the second coupling port (122).

[0043] FIG. 4 is a plan view illustrating how a blocking member of a high-pressure backflow prevention valve according to one embodiment of the present invention is seated in a first coupling port.

[0044] Additionally, referring to FIG. 4, the valve (100) may include a blocking member (140) that is seated in the first coupling port (112) and interposed between the first passage (111) and the second passage (121). Specifically, the blocking member (140) may be seated in the coupling portion of the first coupling port (112) and interposed between the coupling portion of the first coupling port (112) and the coupling portion of the second coupling port (122).

[0045] Additionally, referring to FIG. 2, the blocking member (140) may be configured to move between the first passage (111) and the second passage (121) along the flow of fluid within the first passage (111) and the second passage (121). For example, an elastic member (not shown) may be provided in the second coupling port (112) so that the blocking member (140) and the second coupling port (112) can be connected by the elastic member (not shown). At this time, when the pressure of the flowing fluid is greater than the elastic force of the elastic member (not shown), the elastic member moves downward in FIG. 2, and at the same time, the blocking member (140) is also separated from the first coupling port (112), thereby forming a space through which fluid can flow. Additionally, if the pressure of the flowing fluid is less than the elastic force of the elastic member (not shown) or if the fluid flows backward, the blocking member (140) can be seated in the first coupling port (112) to block the first passage (111) and prevent the fluid from flowing backward.

[0046] As another example, the blocking member (140) may be provided to be seated in the first coupling port (112) and selectively opened or closed according to the flow of fluid. Specifically, referring to FIG. 1, the blocking member (140) may be provided in a state connected by a hinge (not shown) at either the upper or lower side of the first coupling port (112). Accordingly, when the fluid flows from right to left in FIG. 1, the blocking member (140) opens along the direction of the fluid flow so that the fluid can flow, but when the flow of fluid stops, the first coupling port (112) closes due to the weight of the blocking member (140) so that backflow of fluid can be prevented.

[0047] At this time, since the sealing member (140) is exposed to contact with the fluid, it may be provided with a corrosion-resistant member (e.g., medical silicone) to prevent corrosion by the fluid.

[0048] In other words, referring to FIG. 2, the blocking member (140) is seated in the concave portion of the first coupling port (112) and the convex portion of the second coupling port (122) is inserted into the concave portion of the first coupling port (112), so that the blocking member (140) is interposed between the first coupling port (112) and the second coupling port (122) to control the flow of fluid.

[0049] FIG. 5 is a three-dimensional conceptual diagram illustrating the combination of a body and a case member of a high-pressure backflow prevention valve according to one embodiment of the present invention.

[0050] Additionally, referring to FIG. 5, the body (110) and the case member (120) can be joined together by attaching an adhesive member (131) along the perimeter of the joint (130). For example, the adhesive member (131) may be provided with a UV adhesive, but is not limited thereto, and various adhesive-capable members may be included in the adhesive member (131).

[0051] The joint portion (130) illustrated in FIG. 5 may be formed by filling the outer surface of the first coupling port (112) and the inner surface of the second coupling port with an adhesive member (131). Accordingly, the joint portion (130) can be understood as being formed along the direction in which the first passage and the second passage extend between the first coupling port (112) and the second coupling port (122).

[0052] More specifically, the joint portion (130) may have a cylindrical shape extending between the outer surface of the first joint port (112) and the inner surface of the second joint port. At this time, the shape of the joint portion (130) may vary depending on the shape of the outer surface of the first joint port and the inner surface of the second joint port, but the joint portion (130) may be understood as having a hollow of the first joint port (112) and being formed along the direction in which the first passage and the second passage extend.

[0053] In the case of a conventional valve that simply forms a joint by joining the plane perpendicular to the direction in which the first and second passages extend, when high-pressure fluid moves through the valve, the part where the joint is formed easily detaches, and consequently, there is a problem of low durability of the valve. In contrast, the present valve provides adhesion over a wider area by joining the first coupling port (112) and the second coupling port (122) along the direction in which the joint (130) extends through the passage, thereby preventing the body (110) and the case member (120) from separating as much as possible even when high-pressure fluid moves through the present valve.

[0054] Additionally, referring to FIG. 5, the adhesive member (131) may be provided to fill the space between the inner surface of the second coupling port (122) and the outer surface of the first coupling port (112).

[0055] Additionally, the body (110) and the case member (120) may be provided with a member capable of withstanding the pressure of the fluid flowing inside and may be provided with a member that does not react to drugs. For example, high-pressure plastic may be suitable for this.

[0056] Hereinafter, a method for assembling a high-pressure backflow prevention valve according to one embodiment of the present invention (hereinafter referred to as the 'method for assembling the valve (S100)') will be described. However, since the method for assembling the valve (100) described above shares the same or corresponding technical features as the valve (100), the same reference numerals will be used for configurations that are identical or similar to the configuration of the valve (100), and redundant descriptions will be simplified or omitted.

[0057] FIG. 6 is a drawing for explaining the assembly method of a high-pressure backflow prevention valve according to one embodiment of the present invention.

[0058] Referring to FIG. 6, the valve assembly method (S100) may include the step of preparing a body (110) including a first passage (111) and a first coupling port (112), the step of preparing a case member (120) including a second passage (121) and a second coupling port (122) (S120), and the step of inserting the first coupling port (112) into the second coupling port (122) (S130).

[0059] Additionally, the step of preparing the body (110) (S110) may include the step of seating a blocking member (140) on the first coupling port (112). Specifically, the step of preparing the body (110) (S110) may include the step of seating a blocking member (140) on the coupling portion of the first coupling port (112).

[0060] At this time, in the step of seating the blocking member (140), the blocking member (140) may be provided to move between the first passage (111) and the second passage (121) and to control the flow of fluid. For example, referring to FIG. 2, in the step (S120) of preparing the case member (120), an elastic member (not shown) may be provided in the second coupling port (112) so that the blocking member (140) and the second coupling port (112) may be connected by the elastic member. At this time, when the pressure of the flowing fluid is greater than the elastic force of the elastic member (not shown), the elastic member moves downward in FIG. 2 and at the same time, the blocking member (140) is spaced apart from the first coupling port (112) so that a space for the fluid to flow is formed, and the blocking member (140) can be provided so that when the pressure of the flowing fluid is less than the elastic force of the elastic member (not shown) or the fluid flows backward, the blocking member (140) can be seated in the first coupling port (112) to block the first passage (111) and prevent the backflow of the fluid.

[0061] As another example, in the step of seating the blocking member (140), the blocking member (140) may be seated in the first coupling port (112) and configured to selectively open and close according to the flow of fluid. Specifically, referring to FIG. 1, in the step of seating the blocking member (140), the blocking member (140) may be configured to be hinged at either the upper or lower side of the first coupling port (112). Accordingly, when the fluid flows from right to left in FIG. 1, the blocking member (140) opens along the direction of the fluid flow so that the fluid can flow, but when the flow of fluid stops, the first coupling port (112) closes due to the weight of the blocking member (140), thereby preventing backflow of fluid.

[0062] Additionally, the step of preparing the body (110) (S110) and the step of preparing the case member (120) (S120) may include a step of conducting a full inspection of the parts, as the body (110) and the case member (120) must be equipped for high pressure, so there must be no defects in the parts during the injection molding process. The step of preparing the body (110) (S110) and the step of preparing the case member (120) (S120) may be performed simultaneously or in a different order.

[0063] Additionally, the insertion step (S130) may be a step of forming a joint (130) between the outer surface of the first coupling port (112) and the inner surface of the second coupling port (122). At this time, the insertion step (S130) may be a step in which the first coupling port (112) is inserted into the second coupling port (122), and the coupling portion of the second coupling port (122) is inserted into the coupling portion of the first coupling port (112).

[0064] Additionally, the valve assembly method (S100) may include a step (S140) of joining the body (110) and the case member (120) by attaching an adhesive member (131) along the perimeter of the joint (130).

[0065] In addition, the joining step (S140) can be performed by attaching an adhesive member (131) along the perimeter of the joint (130) using automated equipment, thereby ensuring excellent accuracy and reducing the defect rate.

[0066] Additionally, the joining step (S140) may be a step of filling the space between the outer surface of the first joining port (112) and the inner surface of the second joining port (122) with an adhesive member (131).

[0067] In addition, the valve assembly method (S100) may include a step of performing a pressure test on the product after bonding the adhesive member (131).

[0068] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical concept or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0069] The scope of the present invention is defined by the claims set forth below rather than by the detailed description above, and all modifications or variations derived from the meaning and scope of the claims and the concept of equivalents thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0070] 100: High-pressure backflow prevention valve 110: Body 111: First passage 112: First coupling port 120: Case absence 121: Second passage 122: Second coupling port 130: Joint 131: Adhesive member 140: Blocking member

Claims

Claim 1 A backflow prevention valve comprising a body including a first passage through which fluid flows and a first coupling port; The device further comprises a case member coupled to the body and including a second passage through which the fluid flows and a second coupling port, wherein the first coupling port is inserted into the second coupling port to form a joint between the outer surface of the first coupling port and the inner surface of the second coupling port, the body and the case member are coupled to each other by having an adhesive member attached along the periphery of the joint, the joint is formed along the direction in which the first passage and the second passage extend between the first coupling port and the second coupling port, and the adhesive member is filled into the joint, the first coupling port is provided with an upwardly recessed coupling portion of the first coupling port, and the second coupling port is provided with an upwardly protruding coupling portion of the second coupling port, wherein the coupling portion of the second coupling port is inserted into the coupling portion of the first coupling port so that the first passage and the second passage are connected to each other, and the backflow prevention valve further comprises a blocking member that is seated on the first coupling port and interposed between the first passage and the second passage. A high-pressure backflow prevention valve, wherein the blocking member is seated on the coupling portion of the first coupling port and interposed between the coupling portion of the first coupling port and the coupling portion of the second coupling port, and the blocking member is configured to move between the first passage and the second passage along the flow of the fluid within the first passage and the second passage, and the backflow prevention valve further comprises an elastic member connecting the second coupling port and the blocking member, and the blocking member moves between the first passage and the second passage by the elastic force of the elastic member. Claim 2 delete Claim 3 delete Claim 4 A high-pressure backflow prevention valve according to claim 1, wherein the body and the case member are provided with members capable of withstanding the pressure of the fluid flowing inside. Claim 5 A method for assembling a backflow prevention valve according to claim 1, comprising: a step of preparing the body including the first passage and the first coupling port; and a step of preparing the case member including the second passage and the second coupling port. The method further includes the step of inserting the first coupling port into the second coupling port, wherein the insertion step is the step of forming a joint between the outer surface of the first coupling port and the inner surface of the second coupling port, and the assembly method of the backflow prevention valve further includes the step of joining the body and the case member by attaching an adhesive member along the perimeter of the joint, wherein in the joining step, the adhesive member is filled into the joint, and in the insertion step, the coupling part of the second coupling port is inserted into the coupling part of the first coupling port so that the first passage and the second passage are connected to each other, and the step of preparing the body includes the step of seating a blocking member on the first coupling port, wherein in the step of seating the blocking member, the blocking member is seated on the coupling part of the first coupling port, and in the step of seating the blocking member, the blocking member is provided to move between the first passage and the second passage along the flow of the fluid within the first passage and the second passage, and A method for assembling a high-pressure backflow prevention valve, wherein, in the step of seating a blocking member, the blocking member is connected to the second coupling port through an elastic member and moves between the first passage and the second passage by the elastic force of the elastic member. Claim 6 delete Claim 7 delete

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