A freeze-resistant valve module

Abstract

The utility model provides an anti -frozen valve module, including pressure relief subassembly and inner casing, pressure relief subassembly includes fixed part, piston piece and spring, and the outer periphery of fixed part is sealed and is covered to inner casing, piston piece sealedly abuts the lateral wall of inner casing, and piston piece is movable along the axis of inner casing, and fixed part, piston piece and inner casing enclose and constitute pressure relief chamber, spring is arranged between fixed part and piston piece, and inner casing is equipped with the pressure relief passage of pressure relief chamber intercommunication, and spring keeps piston piece sealed and blocks pressure relief passage, fixed part is equipped with the exhaust hole of intercommunication pressure relief chamber and outside atmosphere, fixed part is equipped with the water flow channel of intercommunication inner casing outer peripheral space, when the water flow is frozen, opens through driving piston piece pressure relief chamber, provides '' additional volume '' for ice -water mixture of 9% volume expansion, avoids local stress concentration, causes the pipe wall of fluid delivery spare to be destroyed.

Description

Technical Field

[0001] This utility model relates to the field of anti-freezing crack technology, specifically to an anti-freezing valve module. Background Technology

[0002] Fluid transport components, such as solenoid valve bodies, gate valves, float flow meters, and various DN15 pipe sections and fittings, are widely used in domestic water supply, industrial circulating water, and other systems. For ease of design, manufacturing, and interchangeability, the inlet and outlet diameters of these fluid transport components typically adopt the "Nominal Diameter (DN)" series in the national standard GB / T 1047, where DN15 indicates a pipe or valve diameter of "nominal diameter 15 mm".

[0003] In cold regions, when the ambient temperature remains below 0°C and water flow ceases, the stagnant water remaining inside the fluid transport components will freeze due to volume expansion. This phase change expansion of water (approximately 9%) can generate localized stresses exceeding 200 MPa in valve chambers, pipe cavities, or thin-walled sections, easily leading to freezing and cracking of the fluid transport component's housing or valve body. Therefore, there is an urgent need in this field for a simple, low-cost, maintenance-free, and highly reliable anti-freezing protection solution to address the problem of DN15 and other sizes of fluid transport components being prone to freezing and cracking in cold regions. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to propose an antifreeze valve module to solve the problems mentioned in the background section above.

[0005] This utility model is achieved through the following technical solution: An antifreeze valve module is provided, wherein the antifreeze valve module is built into the pipeline of a fluid conveying component, and the outer wall of the antifreeze valve module and the inner wall of the pipeline of the fluid conveying component form a water flow chamber through which water flows. The antifreeze valve module has a pressure relief chamber inside, and the pressure relief chamber and the water flow chamber are connected by a pressure relief channel, which is located in the area of ​​maximum thermal inertia in the pipeline of the fluid transport component. The antifreeze valve module also includes a piston component that is movable between a position that blocks the pressure relief channel and a position that keeps the pressure relief channel open. The antifreeze valve module is also provided with an exhaust port, which is connected to the atmosphere. During the movement of the piston, the compressed air inside the pressure relief chamber is released to the atmosphere through the exhaust port to eliminate the back pressure formed in the pressure relief chamber.

[0006] Furthermore, the region with the greatest thermal inertia corresponds to the region where the central axis of the fluid transport component's pipe is located.

[0007] Furthermore, it also includes pressure relief components and an inner housing; The pressure relief assembly includes a fixing member, the piston member, and a spring. The inner shell is sealed around the outer periphery of the fixing member. The fixing member is sealed and inserted into the pipe of the fluid conveying member. The internal space enclosed by the fluid conveying member, the inner shell, and the fixing member constitutes the water flow chamber. The fixing member is provided with a water flow channel communicating with the water flow chamber. The piston assembly seals against the side wall of the inner housing, and the fixing member, piston assembly, and inner housing together form the pressure relief chamber, and the piston assembly is movable along the central axis of the inner housing; The spring is disposed between the fixing member and the piston member, and the spring keeps the piston member sealed and blocking the pressure relief channel.

[0008] Furthermore, the fluid conveying component, the inner shell, and the pressure relief channel are arranged with their central axes collinear, and the pressure relief channel 21 is located at the bottom of the inner shell 2.

[0009] Furthermore, the fixing member has a guide hole, and one end of the piston member has a rod-shaped structure and is embedded in the guide hole, and moves along the guide hole.

[0010] Furthermore, the vent is connected to the guide hole and the outside atmosphere, and the vent is located at the end away from the pressure relief channel.

[0011] Furthermore, the outer periphery of the fixing member is fitted with a first sealing ring that abuts against the inner wall of the pipe of the fluid conveying member; the outer periphery of the fixing member is fitted with a second sealing ring that abuts against the inner wall of the inner housing; the outer periphery of the piston member is fitted with a third sealing ring that abuts against the inner wall of the inner housing; and the end of the piston member is provided with a sealing pad that abuts against the bottom of the inner housing.

[0012] The beneficial effects of this utility model are as follows: An antifreeze valve module includes a pressure relief assembly and an inner shell; the pressure relief assembly includes a fixing member, a piston member, and a spring; the inner shell is sealed and fitted around the outer periphery of the fixing member; the piston member is sealed and abuts against the side wall of the inner shell, and the piston member is movable along the axis of the inner shell; the fixing member, the piston member, and the inner shell together form a pressure relief chamber; the spring is disposed between the fixing member and the piston member; the inner shell has a pressure relief channel communicating with the pressure relief chamber; the spring keeps the piston member sealed and blocking the pressure relief channel; the fixing member has an exhaust port communicating with the pressure relief chamber and the external atmosphere; the fixing member has a water flow channel communicating with the outer periphery of the inner shell; when the water freezes, the piston member is driven to open the pressure relief chamber, providing "extra volume" for the ice-water mixture that expands by 9%, avoiding local stress concentration that could damage the pipe wall of the fluid transport component. Attached Figure Description

[0013] Figure 1 This is a perspective view of an antifreeze valve module according to the present invention.

[0014] Figure 2 This is an exploded view of an antifreeze valve module and a fluid conveying component according to the present invention.

[0015] Figure 3 This is a center-section view of the fluid transport component assembly of an antifreeze valve module according to this utility model.

[0016] Figure 4 This is a perspective view of the fastener of this utility model.

[0017] The above figures include the following reference numerals: 1. Pressure relief assembly; 11. Fixing component; 111. Water flow channel; 112. Vent hole; 113. Guide hole; 114. Snap-fit ​​part; 12. Piston component; 13. Spring; 14. Pressure relief chamber; 15. First sealing ring; 16. Second sealing ring; 17. Third sealing ring; 18. Sealing gasket; 2. Inner shell; 21. Pressure relief channel; 22. Snap-fit ​​groove; a. Fluid conveying component; b. Water flow chamber. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. It should be noted that the description of these embodiments is intended to aid in understanding this utility model, but does not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0019] Reference Figures 1 to 4 As shown, an antifreeze valve module is built into the pipe of a fluid conveying component a, and the outer wall of the antifreeze valve module and the inner wall of the pipe of the fluid conveying component a form a water flow chamber b through which water flows. The antifreeze valve module has a pressure relief chamber 14 inside, and the pressure relief chamber 14 and the water flow chamber b are connected through a pressure relief channel 21. The pressure relief channel 21 is located in the area of ​​maximum thermal inertia in the pipeline of the fluid transport component a. The antifreeze valve module also includes a piston 12, which is movable between a position that blocks the pressure relief channel 21 and a position that keeps the pressure relief channel 21 open. The antifreeze valve module is also provided with an exhaust port 112, which is connected to the atmosphere. During the movement of the piston 12, the compressed air inside the pressure relief chamber 14 is released to the atmosphere through the exhaust port 112 to eliminate the back pressure formed in the pressure relief chamber 14.

[0020] With the above structure, since the antifreeze valve module is built into the pipeline of fluid transport component a, and the pressure relief channel 21 is located in the area of ​​maximum thermal inertia within the pipeline of fluid transport component a, it can fully utilize the characteristic that temperature conduction takes the longest in this area. This allows the freezing time of the pressure relief channel 21 to naturally lag behind other areas of the pipeline of fluid transport component a, maintaining its unobstructed state for a longer period. This ensures that the pressure relief channel 21 is the last to be blocked during the entire freezing process, preserving a clear path for the timely opening of the pressure relief chamber 14. This effectively avoids the problem of losing pressure relief function due to premature freezing of the pressure relief channel 21, providing a fundamental guarantee for the stable operation of the antifreeze valve module.

[0021] Specifically, the area with the greatest thermal inertia corresponds to the area where the central axis of the fluid transport component a is located, thereby ensuring that the pressure relief channel 21 is in a relatively central position and that the freezing time of the pressure relief channel 21 is the latest.

[0022] Because of the presence of the exhaust port 112, the movement of the piston 12 is prevented from being hindered by back pressure or from causing "air lock". This ensures that the piston 12 can move smoothly and the pressure relief chamber (14) can be fully opened, thereby fundamentally eliminating the failure of the antifreeze function caused by air resistance.

[0023] Specifically, in this utility model, an antifreeze valve module includes a pressure relief assembly 1 and an inner shell 2. The pressure relief assembly 1 includes a fixing member 11, a piston member 12, and a spring 13. The inner shell 2 is sealed and fitted around the outer periphery of the fixing member 11. The piston member 12 seals against the side wall of the inner shell 2 and is movable along the axis of the inner shell 2. The fixing member 11, the piston member 12, and the inner shell 2 together form a pressure relief chamber 14. The spring 13 is disposed between the fixing member 11 and the piston member 12. The inner shell 2 has a pressure relief channel 21 communicating with the pressure relief chamber 14. The spring 13 keeps the piston member 12 sealed and blocking the pressure relief channel 21. The fixing member 11 has an exhaust port 112 communicating with the pressure relief chamber 14 and the external atmosphere. The fixing member 11 also has a water flow channel 111 communicating with the outer periphery of the inner shell 2. The exhaust port 112 and the water flow channel 111 are not interconnected.

[0024] Specifically, the fixing member 11 is sealed and inserted into the open end of the fluid conveying member a, so that the internal space enclosed by the fluid conveying member a, the inner shell 2 and the fixing member 11 constitutes the water flow chamber b, and the pressure relief channel 21 is connected to the water flow chamber b.

[0025] Under normal operating conditions, water flows sequentially through water flow channel 111 into water flow chamber b and continues to flow along the pipeline of fluid transport component a, thus not affecting the normal water transport operation of fluid transport component a.

[0026] When the water in the water flow chamber b freezes due to environmental factors, the pressure from the ice-water mixture acts on the piston 12. Driven by this pressure, the piston 12 displaces, opening the originally closed pressure relief chamber 14. The pressure relief chamber 14 connects to the "extra volume" of the water flow chamber b. The expanding ice-water mixture can immediately fill this extra volume, thereby reducing the local stress peak to below the material safety limit and completely preventing the pipe wall or valve body of the fluid transport component a from freezing and cracking due to stress concentration.

[0027] The pressure relief channel 21 is located at the bottom of the inner housing 2, and the inner housing 2 is fastened to the lower end of the fixing member 11. Preferably, the pressure relief channel 21 is centrally located at the bottom of the inner housing 2.

[0028] The fluid transport component a, the inner shell 2, and the pressure relief channel 21 are arranged with their central axes collinear, and the pressure relief channel 21 is located at the bottom of the inner shell 2. This keeps the pressure relief channel 21 as far away as possible from the water flow channel 111 and the pipe wall of the fluid transport component a, as these parts are the first to come into contact with the external low-temperature environment and freeze first. Because the pressure relief channel 21 is located at the geometric center with the greatest thermal inertia, its freezing time is naturally delayed. This forms an icing sequence of "outer first, then inner; periphery first, then center," ensuring that the pressure relief channel 21 is blocked last in the entire freezing process, thus maintaining a clear passage for the timely opening of the pressure relief chamber 14.

[0029] The fixing member 11 has a guide hole 113. One end of the piston member 12 has a rod-like structure and is embedded in the guide hole 113, and moves along the guide hole 113. The guide hole 113 guides the movement direction of the piston member 12, ensuring that the piston member 12 always maintains coaxial movement under the impact of the high-pressure ice-water mixture, and eliminating lateral deviation.

[0030] The outer periphery of the fixing member 11 is fitted with a first sealing ring 15 that abuts against the inner wall of the fluid conveying member a; the outer periphery of the fixing member 11 is fitted with a second sealing ring 16 that abuts against the inner wall of the inner housing 2; the outer periphery of the piston member 12 is fitted with a third sealing ring 17 that abuts against the inner wall of the inner housing 2; and the end of the piston member 12 is provided with a sealing gasket 18 that abuts against the bottom of the inner housing 2. This ensures the sealing of the water flow chamber b and the pressure relief chamber 14.

[0031] Preferably, the first sealing ring 15, the second sealing ring 16, the third sealing ring 17 and the sealing gasket 18 are all made of variable rubber material, and the lower end of the third sealing ring 17 is V-shaped forked, thereby improving the sealing effect with the inner shell 2.

[0032] The fastener 11 is provided with a buckle part 114, and the inner housing 2 is provided with a snap-fit ​​groove 22 for fastening and connecting the buckle part 114, thereby facilitating quick assembly and connection of the two.

[0033] During assembly, first insert one end of the piston 12 into the inner housing 2, then put the spring 13 into the piston 12, then fasten the piston 12 to the fixing member 11, and then insert the inner housing 2 into the fluid conveying member a until the first sealing ring 15 seals and abuts against the fluid conveying member a.

[0034] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0035] In the description of this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An antifreeze valve module, characterized in that: The antifreeze valve module is built into the pipe of the fluid transport component (a), and the outer wall of the antifreeze valve module and the inner wall of the pipe of the fluid transport component (a) form a water flow chamber (b) through which water flows. The antifreeze valve module has a pressure relief chamber (14) inside. The pressure relief chamber (14) and the water flow chamber (b) are connected by a pressure relief channel (21). The pressure relief channel (21) is located in the area of ​​maximum thermal inertia in the pipeline of the fluid transport component (a). The antifreeze valve module also includes a piston (12) that is movable between blocking the pressure relief channel (21) and keeping the pressure relief channel (21) open; The antifreeze valve module is also provided with an exhaust port (112), which is connected to the atmosphere. During the movement of the piston (12), the compressed air inside the pressure relief chamber (14) passes through the exhaust port (112) to the atmosphere to eliminate the back pressure formed in the pressure relief chamber (14).

2. The antifreeze valve module according to claim 1, characterized in that: The region with the greatest thermal inertia corresponds to the region where the central axis of the fluid transport component (a) is located.

3. The antifreeze valve module according to claim 1, characterized in that: It also includes a pressure relief assembly (1) and an inner shell (2); The pressure relief assembly (1) includes a fixing member (11), a piston member (12), and a spring (13). The inner shell (2) is sealed and fitted around the outer periphery of the fixing member (11). The fixing member (11) is sealed and inserted into the pipe of the fluid conveying member (a). The internal space enclosed by the fluid conveying member (a), the inner shell (2), and the fixing member (11) constitutes the water flow chamber (b). The fixing member (11) is provided with a water flow channel (111) that connects to the water flow chamber (b). The piston (12) seals against the side wall of the inner shell (2), and the fixing member (11), piston (12) and inner shell (2) together form the pressure relief chamber (14), and the piston (12) is movable along the central axis of the inner shell (2); The spring (13) is disposed between the fixing member (11) and the piston member (12), and the spring (13) keeps the piston member (12) sealed and blocking the pressure relief channel (21).

4. The antifreeze valve module according to claim 3, characterized in that: The fluid transport component (a), the inner shell (2), and the pressure relief channel (21) are arranged with their central axes collinear, and the pressure relief channel (21) is located at the bottom of the inner shell (2).

5. The antifreeze valve module according to claim 3, characterized in that: The fixing member (11) has a guide hole (113), and one end of the piston member (12) is rod-shaped and embedded in the guide hole (113), and moves along the guide hole (113).

6. The antifreeze valve module according to claim 1, characterized in that: The vent (112) connects the guide hole (113) to the outside atmosphere, and the vent (112) is located at one end away from the pressure relief channel (21).

7. The antifreeze valve module according to claim 3, characterized in that: The outer periphery of the fixing member (11) is fitted with a first sealing ring (15) that abuts against the inner wall of the pipe of the fluid conveying member (a); the outer periphery of the fixing member (11) is fitted with a second sealing ring (16) that abuts against the inner wall of the inner shell (2); the outer periphery of the piston member (12) is fitted with a third sealing ring (17) that abuts against the inner wall of the inner shell (2); and the end of the piston member (12) is provided with a sealing pad (18) that abuts against the bottom of the inner shell (2).

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