Pressure reducing valve for water conveying pipe

Abstract

The utility model relates to the technical field of valves, in particular to a pressure reducing valve for a water conveying pipe, which comprises an outer shell with a cavity inside, a water inlet connector is arranged at one end of the outer shell, and a water outlet connector is arranged at the other end of the outer shell. The pressure reducing valve element is composed of a valve element body, a pressure cover with a water inlet hole and an elastic piece used for adjusting the opening degree of the valve element, the pressure cover is arranged on the side, close to the water inlet connector, of the cavity and can move in the axial direction of the outer shell, a plurality of sets of water passing holes communicated with the water inlet hole are formed in the valve element body, and the elastic piece is arranged between the pressure cover and the valve element body. The elastic piece is located on the outer sides of the water inlet ends of the multiple sets of water passing holes, in the assembling process, only the sealing washer and the pressure cover need to be arranged on the limiting part in a sleeving mode, the valve element body is assembled in the outer shell in a sealed mode through the sealing ring, the connecting structure between the parts is simple, the number of the parts is small, and due to the fact that multiple sealing structures are reduced, the cost is reduced. The production assembly difficulty and cost of the product are greatly reduced, and the product assembly process is simplified.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, and in particular to a pressure reducing valve for water supply pipes. Background Technology

[0002] The main function of a water supply pipe pressure reducing valve is to reduce and stabilize the water pressure in the pipeline, thereby ensuring water safety and system stability. It also reduces the impact of excessively high water pressure in the water supply pipe on terminal equipment such as faucets, water heaters, and washing machines, or damage to internal parts or shortened service life due to pressure overload.

[0003] Traditional pressure reducing valves for water pipes employ relatively complex pressure reducing structures. A utility model patent announcement (CN208397378U) describes a pressure reducing valve where the valve body is divided into an inlet chamber and an air chamber by a partition. An inlet cap is mounted on the upper end of the valve body, and an outlet cap is mounted on the lower end, both sealed to the valve body with sealing rings. The outlet cap has a water storage chamber on the side that mates with the valve core. A valve stem on the valve core passes through a through-hole in the partition and is sealed by a sealing plate. The valve stem extends into the inlet chamber and moves up and down along the through-hole. A sealing ring is present on the outer wall of the valve cap on the valve core. The outer wall of the valve cap is sealed to the inner wall of the air chamber through the sealing ring and can move up and down. A spring is sleeved on the valve stem and is in a compressed state.

[0004] Existing pressure reducing valves have problems with complex internal structure and a large number of parts, which not only increases production and assembly costs, but also increases assembly difficulty because each chamber needs to be sealed and the valve stem needs to move between the water inlet chamber and the air chamber. Therefore, further improvements are needed to the existing pressure reducing valves. Summary of the Invention

[0005] The purpose of this invention is to provide a pressure reducing valve for water supply pipes to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure reducing valve for a water supply pipe, comprising an outer shell with an internal cavity, one end of the outer shell having a water inlet and the other end having a water outlet, a pressure reducing valve core assembled in the cavity of the outer shell, the pressure reducing valve core comprising a valve core body, a pressure cap having a water inlet hole, and an elastic element for adjusting the valve core opening, the pressure cap being positioned on the side of the cavity near the water inlet hole and being movable along the axial direction of the outer shell, the valve core body having a plurality of sets of water passage holes communicating with the water inlet hole, the elastic element being positioned between the pressure cap and the valve core body, the elastic element being located on the outside of the water inlet end of the plurality of sets of water passage holes.

[0007] A limiting part is constructed on the side of the valve core body facing the water inlet, and the pressure cover is sleeved on the limiting part through the water inlet hole, so that the pressure cover can move vertically along the limiting part.

[0008] The elastic element is an annular sealing gasket, which is sleeved on the limiting part. There is a water passage space between the annular sealing gasket and the limiting part, and several sets of water passage holes are arranged in the water passage space.

[0009] A sealing ring is fitted onto the valve core body, with the inner side of the sealing ring abutting against the outer side of the valve core body and the outer side of the sealing ring abutting against the inner wall of the outer casing.

[0010] The pressure reducing valve core also includes a spring-loaded component for supporting the pressure cover. The spring-loaded component is assembled on the side of the valve core body facing the water inlet, and the upper end of the spring-loaded component is connected to the pressure cover.

[0011] The valve core body has a baffle plate on the side facing the water outlet to block backflow. The baffle plate is installed at the water outlet of several sets of water passages and is made of soft rubber material.

[0012] A mounting post is constructed on the side of the valve core body facing the water outlet, and the stop plate is provided with a mounting hole. The stop plate is assembled on the mounting post through the mounting hole and can move along the axial direction of the mounting post.

[0013] The outer casing has a first convex ring on the inner wall near the water inlet, and a second convex ring below the first convex ring. An upper mounting position is formed between the first and second convex rings, and a lower mounting position is formed between the second convex ring and the water outlet. The pressure reducing valve core is placed in the upper mounting position, and the mounting post is placed in the lower mounting position.

[0014] The valve core body has multiple sets of water passage holes, which are symmetrically arranged in a ring around the water passage space.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows: The pressure reducing valve of this application is mainly composed of four parts: valve core body, annular sealing gasket, pressure cover and outer shell. In the assembly process, it is only necessary to put the annular sealing gasket and pressure cover on the limiting part of the valve core body respectively, and the valve core body is sealed and assembled into the outer shell by the sealing ring.

[0016] Water enters the cavity through the inlet port of the outer casing. The pressure cap, under water pressure, moves downwards, squeezing the annular sealing gasket. The annular sealing gasket undergoes elastic deformation, partially covering the inlet of the water passage, thus reducing the opening of the water passage. During this process, the pressure energy of the water flow is converted into the elastic potential energy of the annular sealing gasket, creating resistance in the opposite direction to the inlet pressure. This resistance counteracts some of the water flow energy, allowing the water to flow from the inlet port on the pressure cap to the narrowed water passage, achieving pressure reduction. The water then flows out through the outlet port of the outer casing.

[0017] The connection structure between the components of this pressure reducing valve is relatively simple, the number of parts is effectively reduced, and the reduction of multiple sealing structures greatly reduces the difficulty and cost of product production and assembly, simplifying the product assembly process. Attached Figure Description

[0018] Figure 1 This is a cross-sectional schematic diagram of a pressure reducing valve used in water supply pipelines;

[0019] Figure 2 A top view of the valve core body and the annular sealing gasket.

[0020] Figure 3 This is a schematic diagram of the main structure of the pressure reducing valve core.

[0021] The components in the attached diagram are labeled as follows:

[0022] 1-Outer shell, 11-Inlet port, 12-Outlet port, 13-First convex ring, 14-Second convex ring; 2-Pressure reducing valve core, 21-Valve core body, 22-Pressure cover, 23-Inlet hole, 24-Annular sealing gasket, 25-Water passage hole, 26-Limiting part, 27-Water passage space, 28-Sealing ring, 29-Rebound element, 210-Stop plate, 211-Mounting post, 212-Limiting platform. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example 1: As Figure 1-3As shown, a pressure reducing valve for a water supply pipe includes an outer shell 1 with an internal cavity. One end of the outer shell 1 has a water inlet 11 and the other end has a water outlet 12. A pressure reducing valve core 2 is assembled in the cavity of the outer shell 1. The pressure reducing valve core 2 consists of a valve core body 21, a pressure cover 22 with a water inlet hole 23, and an elastic element for adjusting the valve core opening. The pressure cover 22 is placed on the side of the cavity near the water inlet 11 and can move along the axial direction of the outer shell 1. The valve core body 21 has several sets of water passage holes 25 that communicate with the water inlet hole 23. The elastic element is placed between the pressure cover 22 and the valve core body 21. The elastic element is located outside the water inlet end of the several sets of water passage holes 25. Water flows into the cavity from the water inlet 11 of the outer shell 1. The pressure cover 22 moves downward under the water pressure and squeezes the elastic element. The elastic element undergoes elastic deformation and covers part of the water inlet port of the water passage hole 25, thereby reducing the opening of the water passage hole 25. During this process, the pressure energy of the water flow is converted into the elastic potential energy of the elastic element, forming a resistance in the opposite direction to the inlet pressure, thus offsetting part of the water flow energy. The water flows from the inlet hole 23 on the pressure cover 22 to the narrowed water passage hole 25, achieving pressure reduction of the water flow, and then flows out from the outlet port 12 of the outer casing 1. When the water pressure is at a normal level, the elastic element returns to its original state, and the water passage hole returns to its normal opening.

[0025] Specifically, the water inlet 23 of the pressure cover is provided corresponding to the water inlet interface 11 of the outer shell, the water passage 25 is provided along the axial direction of the valve core body 21, and the water inlet interface 11 of the outer shell is connected to the water inlet 23 on the pressure cover, the water passage 25 on the valve core body and the water outlet interface 12 of the outer shell.

[0026] Preferably, a limiting part 26 is constructed on the side of the valve core body 21 facing the water inlet interface 11. The pressure cover 22 is sleeved on the limiting part 26 through the water inlet hole 23, so that the pressure cover 22 can move vertically along the limiting part 26. The limiting part 26 consists of two sets of vertical columns. The two sets of vertical columns extend from the valve core body towards the water inlet interface. The two sets of vertical columns are arranged at intervals along the radial direction of the water inlet hole 23 to ensure that the water flow can flow from the water inlet hole to the water outlet hole.

[0027] Two sets of vertical columns are respectively provided with protrusions on the upper side of the pressure cover. The distance from the protrusions to the elastic element is slightly greater than the height of the pressure cover. The outer diameter of the pressure cover is smaller than the inner diameter of the cavity of the outer shell, ensuring that the pressure cover can move up and down along the vertical columns.

[0028] In this embodiment, the elastic element is an annular sealing gasket 24, which is sleeved on the limiting part 26. A water-passing space 27 exists between the annular sealing gasket 24 and the limiting part 26. The inner diameter of the annular sealing gasket 24 is larger than the outer diameter of the limiting part 26, forming the water-passing space 27. Several sets of water-passing holes 25 are arranged within the water-passing space 27 to ensure that water can flow from the pressure cover inlet hole through the water-passing space into the water-passing hole. When the pressure cover is subjected to water pressure, the annular sealing gasket undergoes elastic deformation, covering part of the water inlet port of the water-passing hole and reducing the opening of the water-passing hole. It should be noted that this annular sealing gasket is prior art, and a suitable annular sealing gasket can be selected according to the required outlet water pressure.

[0029] Preferably, a limiting platform 212 is provided at the periphery of the limiting part of the valve core body, and the annular sealing gasket 24 is sleeved on the limiting platform 212. The outer diameter of the limiting platform is close to or slightly larger than the distance between the two sets of vertical columns. In this preferred embodiment, the water passage space 27 is located between the limiting platform 212 and the annular sealing gasket 24. The inner diameter of the annular sealing gasket is larger than the outer diameter of the limiting platform to form the water passage space. The limiting platform can better restrict the position of the annular sealing gasket, so that the inner edge of the annular sealing gasket is located at the outer periphery surrounded by the water inlet ends of multiple sets of water passage holes.

[0030] The limiting platform and the water passage hole are respectively provided with concave parts, so that the water flows more smoothly from the water inlet hole to the water passage hole.

[0031] The pressure cover has an internal cavity that is connected to the water inlet. The diameter of the cavity is between the outer diameter of the limiting platform and the inner diameter of the annular sealing gasket. The height of the cavity is greater than the height of the limiting platform. The limiting platform and part of the limiting part are placed in the cavity. There is a gap between the cavity and the limiting platform. Water can enter the cavity through the water inlet of the pressure cover and then flow to the water inlet through the water passage.

[0032] Specifically, the bottom surface of the annular sealing gasket 24 is attached to the upper end surface of the valve core body 21, and the top surface of the annular sealing gasket 24 is attached to the bottom surface of the pressure cover 22, so that a sealed channel is formed between the water inlet, the receiving cavity, and the water passage.

[0033] Preferably, the water passage holes 25 on the valve core body 21 are arranged in multiple groups, and the multiple groups of water passage holes 25 are symmetrically arranged in a ring in the water passage space 27, so that the water flow of each water passage hole is more balanced.

[0034] Preferably, a sealing ring 28 is fitted on the valve core body 21. The inner side of the sealing ring 28 abuts against the outer side of the valve core body 21, and the outer side of the sealing ring 28 abuts against the inner wall of the outer shell 1. The outer diameter of the valve core body is close to the inner diameter of the outer shell. The sealing ring and the valve core body are sealed together. After the water flows into the cavity from the water inlet of the outer shell, it enters the water passage with a reduced opening through the water inlet hole of the pressure cover, thereby reducing the pressure of the water flow.

[0035] Preferably, a concave ring is provided on the outer side wall of the valve core body, and the sealing ring is installed in the concave ring.

[0036] Preferably, the pressure reducing valve core 2 also includes a spring-loaded member 29 for supporting the pressure cover 22. The spring-loaded member 29 is mounted on the side of the valve core body 21 facing the water inlet 11, and its upper end is connected to the pressure cover 22. The spring-loaded member 29 is a spring. When the water pressure of the inlet water flow is lower than the normal value, the spring supports the pressure cover upward, maintaining a certain gap between the pressure cover and the annular sealing gasket, ensuring smooth water flow into the water passage. It should be noted that the spring uses an existing soft spring, i.e., a spring with low elastic stiffness. When the water pressure is high, the soft spring generates little resistance in the opposite direction to the inlet water pressure after compression, thus not affecting the pressure cover's compression of the sealing ring.

[0037] The spring is located outside the annular sealing gasket on the valve core body; or, a crossbar is constructed in the water inlet of the pressure cover, and the spring is located on the top surface of the limiting platform, with the top end of the spring connected to the crossbar.

[0038] Preferably, a baffle plate 210 for blocking backflow is constructed on the side of the valve core body 21 facing the water outlet 12. The baffle plate 210 is positioned at the water outlet end of several sets of water passage holes 25. The baffle plate 210 is made of soft rubber material. A mounting post 211 is constructed on the side of the valve core body 21 facing the water outlet 12. A locking block is provided at the end of the mounting post. The baffle plate 210 is provided with mounting holes. The baffle plate 210 is assembled onto the mounting post 211 through the mounting holes and can move along the axial direction of the mounting post 211. When the water flows from the water passage to the water outlet of the outer casing, the baffle plate moves outward with the water flow. The soft rubber baffle plate deforms downward under the action of the water flow force, reducing the obstruction of the water outlet of the water passage hole. When water flows backward, the baffle moves inward with the backward flow, sticking to the bottom surface of the valve core body, preventing the backward flow from entering the water pipe through the water passage and contaminating the water in the water pipe.

[0039] The soft material used to make the stop sheet can be soft rubber or soft silicone, or any existing material that allows the stop sheet to deform under water impact.

[0040] In this embodiment, the outer shell is composed of a first shell and a second shell, which are detachably connected by threads. A first protruding ring 13 is constructed on the inner wall of the outer shell 1 near the water inlet 11, and a second protruding ring 14 is constructed below the first protruding ring 13. An upper mounting position is formed between the first protruding ring 13 and the second protruding ring 14, and a lower mounting position is formed between the second protruding ring 14 and the water outlet 12. The pressure reducing valve core 2 is placed in the upper mounting position, and the bottom surface of the valve core body 21 abuts against the second protruding ring 14. The mounting post 211 is placed in the lower mounting position. The middle part of the first protruding ring and the second protruding ring is hollowed out, which does not affect the flow of water.

[0041] An outer ring wall is provided around the water inlet of the outer casing to form a water inlet interface, and an outer ring wall is provided around the water outlet of the outer casing to form a water outlet interface. The inner walls of the water outlet interface and the water inlet interface are respectively provided with internal threads for connecting water pipes.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A pressure reducing valve for a water supply pipe, comprising an outer shell with an internal cavity, one end of the outer shell having a water inlet and the other end having a water outlet, and a pressure reducing valve core assembled in the cavity of the outer shell, characterized in that: The pressure reducing valve core is composed of a core body, a pressure cover with a water inlet hole, and an elastic member for adjusting the opening degree of the valve core, the pressure cover is arranged on the side of the cavity close to the water inlet interface and can move along the axial direction of the outer shell, a plurality of water passing holes penetrating the water inlet hole are arranged on the core body, the elastic member is arranged between the pressure cover and the core body, and the elastic member is located outside the water inlet end of the plurality of groups of water passing holes.

2. A pressure reducing valve for a water supply line according to claim 1, characterized in that: A limiting part is arranged on the side of the core body close to the water inlet interface, the pressure cover is sleeved on the limiting part through the water inlet hole, and the pressure cover can move vertically along the limiting part.

3. A pressure reducing valve for a water supply line according to claim 2, wherein: The elastic member is a ring-shaped sealing gasket, the ring-shaped sealing gasket is sleeved on the limiting part, and a water passing space is formed between the ring-shaped sealing gasket and the limiting part, and the plurality of groups of water passing holes are arranged in the water passing space.

4. A pressure reducing valve for a water supply line according to claim 1, wherein: A sealing ring is sleeved on the core body, the inner side of the sealing ring abuts against the outer side of the core body, and the outer side of the sealing ring abuts against the inner wall of the outer shell.

5. A pressure reducing valve for a water supply line according to claim 1, wherein: The pressure reducing valve core further comprises a resilient member for supporting the pressure cover, the resilient member is arranged on the side of the core body close to the water inlet interface, and the upper end of the resilient member is connected to the pressure cover.

6. A pressure reducing valve for a water supply line according to claim 1, wherein: A stop piece for blocking the backflow of water is arranged on the side of the core body close to the water outlet interface, the stop piece is arranged at the water outlet end of the plurality of groups of water passing holes, and the stop piece is made of soft rubber.

7. A pressure reducing valve for a water supply line according to claim 6, wherein: An installation column is arranged on the side of the core body close to the water outlet interface, an installation hole is arranged on the stop piece, and the stop piece is assembled on the installation column through the installation hole and can move along the axial direction of the installation column.

8. A pressure reducing valve for a water supply line according to claim 7, wherein: A first protruding ring is arranged on the side of the inner wall of the outer shell close to the water inlet interface, a second protruding ring is arranged below the first protruding ring, an upper installation position is formed between the first protruding ring and the second protruding ring, a lower installation position is formed between the second protruding ring and the water outlet interface, the pressure reducing valve core is arranged in the upper installation position, and the installation column is arranged in the lower installation position.

9. A pressure reducing valve for a water supply line according to claim 3 wherein: The water passing holes on the core body are arranged in multiple groups, and the multiple groups of water passing holes are arranged in a symmetrical ring in the water passing space.

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