Pressure self-adaptive sealing device for overflow pipe of demineralized water tank
By designing a pressure-adaptive sealing device, the problems of carbon dioxide ingress and negative pressure were solved, achieving stable water quality and pressure balance in the demineralized water tank, ensuring normal overflow function, and preventing the demineralized water tank from collapsing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 中广核陆丰核电有限公司
- Filing Date
- 2025-05-19
- Publication Date
- 2026-05-22
AI Technical Summary
The existing demineralized water tank overflow pipe is not equipped with a sealing device, which allows carbon dioxide to enter and affect water quality. In addition, when the vent is blocked, air cannot be replenished, resulting in negative pressure and causing the demineralized water tank to collapse.
Design a pressure-adaptive sealing device, including a support, a membrane assembly, and a hinge. The membrane assembly can automatically adjust its opening or closing according to the pressure difference to prevent carbon dioxide from entering and to act as a vent when under negative pressure, ensuring pressure balance inside and outside the demineralized water tank.
It effectively prevents changes in water quality, saves water production costs, and automatically balances pressure under negative pressure to prevent the demineralized water tank from collapsing and ensures that the overflow function works normally.
Smart Images
Figure CN224266547U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of demineralized water tanks, and more particularly to a pressure adaptive sealing device for the overflow pipe of a demineralized water tank. Background Technology
[0002] Demineralized water tanks are indispensable equipment in industrial production, mainly used for storing and treating demineralized water to ensure water purity and meet production needs. Demineralized water tanks are generally designed with a vent and an overflow pipe. However, the overflow pipes of existing demineralized water tanks are typically open structures without a sealing device at the end. This allows carbon dioxide from the air to enter the demineralized water tank through the overflow pipe. After dissolving in the demineralized water, the carbon dioxide alters the pH value, affecting the water quality. For example, the pH value of alkaline demineralized water may drop from the initial 8.5-9.5 to below 8.5, causing carbonation.
[0003] To address the issue of carbon dioxide entering through the overflow pipe, some existing solutions involve installing a one-way valve on the overflow pipe of the demineralized water tank as a sealing device to prevent carbon dioxide from the air from entering the tank and thus avoiding changes in the quality of the demineralized water. However, this approach completely prevents air from entering the demineralized water tank through the overflow pipe, rendering it unusable as a backup vent. When the vent of the demineralized water tank is blocked, air cannot enter the tank through the overflow pipe either. As demineralized water is released, it cannot replenish the air through the vent or overflow pipe to balance the internal pressure, creating a negative pressure inside the tank. Continuous release of demineralized water will increase this negative pressure, eventually causing the tank to collapse under atmospheric pressure.
[0004] Therefore, in order to ensure that the overflow pipe can prevent carbon dioxide from entering the demineralized water tank under normal conditions, and can also serve as a backup vent when negative pressure is generated inside the demineralized water tank, a new type of sealing device needs to be designed. Utility Model Content
[0005] To address one of the technical problems existing in the prior art, this application provides a pressure adaptive sealing device for the overflow pipe of a demineralized water tank, which can automatically adjust the sealing state according to the pressure changes inside the demineralized water tank to achieve a sealing effect, while also allowing the overflow pipe to serve as a vent in special circumstances.
[0006] According to some embodiments of this application, a pressure adaptive sealing device for an overflow pipe of a demineralized water tank includes a support member adapted to the shape of the overflow pipe. The support member is tubular and forms a cavity. One end of the support member's wall has a connecting cavity for docking with the overflow pipe. At least two hinges are provided, disposed on the inner wall of the cavity, and all hinges are located on the same cross-section of the cavity. Multiple membrane assemblies are rotatably disposed inside the cavity via the hinges. The membrane assemblies are circumferentially distributed and completely cover the cross-section of the cavity. When the pressure difference across the membrane assembly exceeds a threshold value α, the membrane assembly undergoes elastic deformation to form an opening for fluid passage.
[0007] In some embodiments of this application, at the end of the lumen where the connecting cavity is located, the inner diameter of the lumen is 1-3 mm larger than the outer diameter of the overflow pipe.
[0008] In some embodiments of this application, the diameter of the connecting cavity is larger than the wall thickness of the overflow pipe.
[0009] In some embodiments of this application, the depth of the connecting cavity is 20-50 mm.
[0010] In some embodiments of this application, the membrane component is a polymer.
[0011] In some embodiments of this application, the threshold a is greater than 0.05 MPa.
[0012] In some embodiments of this application, the membrane assembly is provided with an elastic seal, which is disposed on the contact surface between the membrane assembly and the inner wall of the lumen.
[0013] In some embodiments of this application, the resilient seal is also disposed on the contact surface of adjacent membrane assemblies.
[0014] In some embodiments of this application, the elastic seal is any one of a rubber ring, a silicone pad, or a magnetic sealing strip.
[0015] In some embodiments of this application, a pull ring is provided on the membrane assembly, and the pull ring is located on the side of the membrane assembly opposite to the overflow pipe.
[0016] The beneficial effects of this application are as follows: This application provides a pressure adaptive sealing device for the overflow pipe of a demineralized water tank. Normally, this pressure adaptive sealing device can prevent carbon dioxide in the air from entering the demineralized water tank through the overflow pipe, preventing changes in the quality of the demineralized water and saving water production costs. The pressure adaptive sealing device can also automatically adjust the membrane module to open based on the internal pressure and drainage status of the demineralized water tank. For example, when the negative pressure inside the demineralized water tank reaches a threshold 'a' or higher, the membrane module undergoes elastic deformation under the pressure difference between the inside and outside, opening inwards. Outside air can then enter the demineralized water tank through the overflow pipe, balancing the pressure inside and outside the tank and preventing it from collapsing. When the demineralized water tank is undergoing overflow drainage, the demineralized water flows out from the overflow pipe and impacts the membrane module, causing the membrane module to open outwards and allowing the demineralized water to flow out normally.
[0017] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the description, claims and drawings. Attached Figure Description
[0018] To more clearly illustrate the technical solution of this application, the following description will be provided in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show some embodiments of this application and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:
[0019] Figure 1 This is a schematic diagram of the pressure adaptive sealing device provided in this application;
[0020] Figure 2 yes Figure 1 A sectional view along line AA.
[0021] Figure 3 This is a schematic diagram of the connection between the pressure adaptive sealing device and the overflow pipe.
[0022] Label Explanation:
[0023] Pressure adaptive sealing device 100, support 110, connecting cavity 111, membrane module 120, elastic seal 121, pull ring 122, hinge 130, overflow pipe 200. Detailed Implementation
[0024] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments. Similar elements in different embodiments are referred to by related similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of the present application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to the present application are not shown or described in the specification. This is to avoid obscuring the core parts of the present application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.
[0025] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.
[0026] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).
[0027] The following is in conjunction with the appendix Figures 1 to 3 The provided embodiments further illustrate the pressure adaptive sealing device for the overflow pipe of the demineralized water tank proposed in this application.
[0028] like Figure 1 and Figure 2 As shown, in some embodiments, this application provides a pressure adaptive sealing device 100 for the overflow pipe of the demineralized water tank, including a support member 110, a membrane assembly 120, and a hinge member 130. The support member 110 is adapted to the shape of the overflow pipe 200. In some embodiments, the cross-sectional shape of the support member 110 and the overflow pipe 200 is preferably circular. The support member 110 is tubular and forms a cavity. One end of the tube wall of the support member 110 is provided with a connecting cavity 111 for docking with the overflow pipe 200, such as... Figure 3 As shown, during use, simply insert the connecting cavity 111 of the support member 110 into the pipe wall of the overflow pipe 200 outlet to complete the connection. The operation is simple, and installation and replacement are more convenient. At least two hinges 130 are provided, and each hinge 130 is located on the inner wall of the pipe cavity. All hinges 130 are situated on the same cross-section of the pipe cavity, such as... Figure 1In some embodiments shown, two hinges 130 are provided, symmetrically distributed on the inner wall of the cavity. Multiple membrane assemblies 120 are provided, each rotatably disposed inside the cavity via hinges 130. The membrane assemblies 120 are evenly distributed circumferentially and completely cover the cross-section of the cavity, such as... Figure 1 In some embodiments shown, two membrane modules 120 are provided, symmetrically arranged. When the pressure difference across the membrane module 120 exceeds a threshold α, the membrane module 120 undergoes elastic deformation to form an opening through which fluid can pass. The pressure adaptive sealing device 100 of this application is installed at the outlet of the overflow pipe 200 of the demineralized water tank. Normally, this pressure adaptive sealing device 100 prevents carbon dioxide in the air from entering the demineralized water tank through the overflow pipe 200, preventing changes in the quality of the demineralized water and saving water production costs. The pressure-adaptive sealing device 100 can also automatically adjust the membrane module 120 to open according to the internal pressure and drainage status of the demineralized water tank. For example, when the negative pressure inside the demineralized water tank reaches a threshold a or higher, the membrane module 120 undergoes elastic deformation under the internal and external pressure difference and opens inward. Outside air can enter the demineralized water tank through the overflow pipe 200, balancing the internal and external pressures of the demineralized water tank and preventing it from collapsing. When the demineralized water tank is overflowing, the demineralized water flows out from the overflow pipe 200 and impacts the membrane module 120, causing the membrane module 120 to open outward and allow the demineralized water to flow out normally. Therefore, the pressure-adaptive sealing device 100 of this application achieves a sealing effect while ensuring the normal overflow function of the overflow pipe 200 and allowing the overflow pipe 200 to serve as a vent in special circumstances, preventing the demineralized water tank from being crushed.
[0029] like Figure 3 As shown, in some embodiments of this application, at the end of the pipe where the connecting cavity 111 is provided, the inner diameter D1 of the pipe is 1-3 mm larger than the outer diameter D2 of the overflow pipe 200. Because the inner diameter D1 of the pipe is larger than the outer diameter D2 of the overflow pipe 200, when the pipe wall of the overflow pipe 200 is inserted into the connecting cavity 111, an interference fit is formed, making the connection between the pressure adaptive sealing device 100 and the overflow pipe 200 more secure. Furthermore, in some embodiments, the support member 110 is preferably made of any one of the following materials: plastic, metal, etc. The support member 110 made of the above materials has a small range of elastic deformation capability, allowing it to better connect with the overflow pipe 200. Considering that the elastic deformation capability of the support member 110 is small, the inner diameter D1 of the pipe is preferably only 1-3 mm larger than the outer diameter D2 of the overflow pipe 200 to avoid excessive deformation of the support member 110, which could lead to loss of recovery capability or damage.
[0030] like Figure 3As shown, in some embodiments of this application, the diameter b1 of the connecting cavity 111 is greater than the wall thickness b2 of the overflow pipe 200. When the pressure adaptive sealing device 100 is installed at the outlet of the overflow pipe 200, the above design makes it easier for the wall of the overflow pipe 200 to enter the connecting cavity 111, thereby reducing the difficulty of installing the pressure adaptive sealing device 100 at the outlet of the overflow pipe 200 and making installation and replacement convenient.
[0031] like Figure 3 As shown, in some embodiments of this application, the depth h of the connecting cavity 111 is 20-50mm, so that the pressure adaptive sealing device 100 and the overflow pipe 200 have sufficient contact surface to ensure the reliability of their connection.
[0032] It is readily apparent that, in some embodiments of this application, the membrane module 120 is preferably made of a high molecular polymer to obtain excellent elastic deformation capability and corrosion resistance. Alternatively, the membrane module 120 may also be made of silicone rubber.
[0033] Furthermore, in some embodiments of this application, the threshold 'a' is greater than 0.05 MPa. Normally, the pressure difference across the membrane module 120 does not exceed 0.05 MPa, and the membrane module 120 is sealed, preventing air from entering the demineralized water tank through the overflow pipe 200. When a negative pressure forms inside the demineralized water tank during use due to a blocked vent, and this negative pressure exceeds 0.05 MPa (i.e., the pressure difference across the membrane module 120 exceeds 0.05 MPa), the membrane module 120 undergoes elastic deformation to form an opening. Outside air enters the demineralized water tank through the overflow pipe 200 to balance the pressure difference inside and outside the tank. In this case, the overflow pipe 200 acts as a backup vent. When the demineralized water tank is overfilled and overflows, the demineralized water flows out from the overflow pipe 200 and impacts the membrane module 120, which can also cause the pressure difference across the membrane module 120 to exceed 0.05 MPa. The membrane module 120 then opens outwards, allowing the demineralized water to flow out normally. Furthermore, the threshold a is preferably in the range of 0.05MPa to 0.3MPa to ensure the sensitivity of the membrane module 120 when it is turned on.
[0034] like Figure 1 and Figure 2 As shown, in some embodiments of this application, an elastic seal 121 is provided on the membrane module 120, and the elastic seal 121 is disposed on the contact surface between the membrane module 120 and the inner wall of the lumen. Further, the elastic seal 121 can be any one of a rubber ring, a silicone gasket, or a magnetic sealing strip. The elastic seal 121 enhances the sealing performance between the membrane module 120 and the inner wall of the lumen, with a leakage rate of <1% under normal conditions, better preventing air from entering the demineralized water tank.
[0035] like Figure 1As shown, in some embodiments of this application, the resilient seal 121 may also be disposed on the contact surface of adjacent membrane assemblies 120 to further enhance the sealing performance.
[0036] like Figure 1 and Figure 2 As shown, in some embodiments of this application, a pull ring 122 is also provided on the membrane module 120, and the pull ring 122 is located on the side of the membrane module 120 away from the overflow pipe 200. After the membrane module 120 is opened, it can be manually restored to the closed state through the pull ring 122.
[0037] Example 1:
[0038] like Figures 1 to 3 As shown, a pressure adaptive sealing device 100 for the overflow pipe of a demineralized water tank includes a support member 110, two membrane modules 120, and two hinges 130. The two membrane modules 120 are connected to the support member 110 via the hinges 130. Both membrane modules 120 are semi-circular and symmetrically distributed. Each membrane module 120 has an elastic sealing element 121 on its outer edge, and the contact point between the two membrane modules 120 is a straight line. In this embodiment, the membrane modules 120 are made of polymer. Neodymium iron boron magnetic strips are provided in the elastic sealing elements 121 at the contact point of the two membrane modules 120. Normally, the membrane modules 120 are sealed by the magnetic attraction of the magnetic strips. When the pressure difference between the two sides of the membrane module 120 exceeds 0.05 MPa, the membrane module 120 undergoes elastic deformation and eventually overcomes the magnetic attraction to open. In this embodiment, a pull ring 122 is provided on the side of the membrane module 120 facing away from the overflow pipe 200. When the membrane module 120 is opened, it must be manually restored to a closed state via the pull ring 122. Furthermore, a neodymium iron boron magnetic strip can also be provided in the elastic sealing member 121 that contacts the inner wall of the pipe cavity, and the support member 110 is preferably made of iron material, so that the connection between the membrane module 120 and the support member 110 is strengthened by magnetic attraction, thereby further ensuring the sealing performance.
[0039] Example 2:
[0040] like Figures 1 to 3As shown, a pressure adaptive sealing device 100 for the overflow pipe of a demineralized water tank includes a support member 110, two membrane modules 120, and two hinges 130. The two membrane modules 120 are connected to the support member 110 via the hinges 130. Both membrane modules 120 are semi-circular and symmetrically distributed. Each membrane module 120 has an elastic sealing element 121 on its outer edge, and the contact point between the two membrane modules 120 is a straight line. In this embodiment, the membrane modules 120 are made of silicone rubber, and the elastic sealing elements 121 are made of polyester fiber reinforcement. The membrane modules 120 and the elastic sealing elements 121 are integrated into a single structure. Normally, the membrane modules 120 are prevented from opening by friction at the contact surface, ensuring their sealed state. When the pressure difference across the membrane module 120 exceeds 0.05 MPa, the membrane module 120 undergoes elastic deformation, ultimately overcoming the friction and opening. In this embodiment, a pull ring 122 is also provided on the side of the membrane module 120 away from the overflow pipe 200. When the membrane module 120 is opened, it needs to be manually restored to the closed state through the pull ring 122.
[0041] It is understood that the above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this application. It should be noted that, for those skilled in the art, without departing from the concept of this application, the above technical features can be freely combined, and several modifications and improvements can be made, all of which fall within the protection scope of this application. Therefore, all equivalent transformations and modifications made within the scope of the claims of this application should fall within the coverage of the claims of this application.
Claims
1. A pressure adaptive sealing device for the overflow pipe of a demineralized water tank, characterized in that, include: A support member, the shape of which is adapted to the overflow pipe of the demineralized water tank, the support member is tubular and forms a cavity, and one end of the tube wall of the support member is provided with a connecting cavity for docking with the overflow pipe. The hinge is provided in at least two parts, the hinge is disposed on the inner wall of the cavity, and all the hinges are located on the same cross section of the cavity; The membrane module is provided in multiple ways. The membrane modules are rotatably disposed inside the cavity via the hinge. The membrane modules are evenly distributed around the circumference and completely cover the cross section of the cavity. When the pressure difference on both sides of the membrane module exceeds a threshold a, the membrane module undergoes elastic deformation to form an opening through which fluid can pass.
2. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 1, characterized in that, At the end of the pipe where the connecting cavity is located, the inner diameter of the pipe is 1-3 mm larger than the outer diameter of the overflow pipe.
3. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 2, characterized in that, The diameter of the connecting cavity is greater than the wall thickness of the overflow pipe.
4. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 3, characterized in that, The depth of the connecting cavity is 20-50mm.
5. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 1, characterized in that, The membrane module is a polymer.
6. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 5, characterized in that, The threshold a is greater than 0.05 MPa.
7. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 1, characterized in that, The membrane assembly is provided with an elastic seal, which is disposed on the contact surface between the membrane assembly and the inner wall of the lumen.
8. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 7, characterized in that, The resilient seal is also disposed on the contact surface of the adjacent membrane assembly.
9. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 7, characterized in that, The elastic sealing element is any one of a rubber ring, a silicone gasket, or a magnetic sealing strip.
10. The pressure adaptive sealing device for the overflow pipe of the demineralized water tank as described in claim 1, characterized in that, The membrane module is provided with a pull ring, which is located on the side of the membrane module opposite to the overflow pipe.