Flow adjusting sleeve of pressure reducing valve

Abstract

The utility model relates to a flow regulating sleeve of a pressure reducing valve, which comprises a cylindrical sleeve arranged at the bottom of a valve plate of the pressure reducing valve, the side wall of the valve plate of the cylindrical sleeve is provided with at least one circle of water inlet holes, and the side wall of the cylindrical sleeve is also provided with at least one pair of V-shaped grooves; and the water inlet holes in the same circle are symmetrically arranged. The flow regulating sleeve of the pressure reducing valve can improve the through-flow rate of the valve, reduce the damage of cavitation, and ensure that the pressure reducing valve can operate safely under various working conditions, especially under the working conditions of high pressure difference and small flow.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, and more specifically, to a flow regulating sleeve of a pressure reducing valve. Background Art

[0002] The pressure reducing valve is an existing product in the industry. The pressure reducing valve is formed by sequentially connecting a valve cover, a diaphragm seat and a valve body. A control cavity is formed between the valve cover and the diaphragm seat, and an inner cavity is formed between the valve body and the diaphragm seat. A valve rod penetrating through the inner cavity and the control cavity is installed in the inner cavity. A valve plate for controlling the opening and closing of the opening is arranged at the lower end of the valve rod, and a diaphragm for dividing the control cavity into an upper control cavity and a lower control cavity is arranged at the upper end of the valve rod. The diaphragm is clamped between diaphragm pressing plates. A valve inlet and a valve outlet communicating with the inner cavity of the valve body are arranged on the valve body. A round hole for water inlet is arranged on the valve plate, and external water flow enters the valve body through the valve plate, so as to realize the flow. Relying solely on the round hole for water inlet affects the flow rate of the valve, and at the same time, the round holes for water inlet are disorderly arranged. After the external high-pressure water enters, it will impact the inner wall of the valve plate, generate a large number of bubbles, block the flow channel, destroy the continuous flow of the liquid in the valve, thereby causing cavitation of the valve plate, greatly reducing the service life of the pressure reducing valve and the flow rate of the valve.

[0003] The prior art CN200520050625.5 discloses a fully automatic adjustable pressure reducing valve, which is formed by sequentially connecting a valve cover, a diaphragm seat and a valve body. A control cavity is formed between the valve cover and the diaphragm seat, and an inner cavity is formed between the valve body and the diaphragm seat. A valve rod penetrating through the inner cavity and the control cavity is installed in the inner cavity. A valve plate for controlling the opening and closing of the opening is arranged at the lower end of the valve rod, and a diaphragm for dividing the control cavity into an upper control cavity and a lower control cavity is arranged at the upper end of the valve rod. The diaphragm is clamped between diaphragm pressing plates. A valve inlet and a valve outlet communicating with the inner cavity of the valve body are arranged on the valve body. A first exhaust valve is installed at the top of the valve cover; a second exhaust valve is installed beside the diaphragm seat; the valve inlet and the valve outlet are respectively connected with a programmed automatic adjustment pilot valve through a communicating pipe, and a motor is connected to the top of the programmed automatic adjustment pilot valve, and the motor is connected to a controller.

[0004] The technical solution disclosed in the prior art realizes pressure regulation by setting an exhaust valve and connecting an adjustment pilot valve, and cannot solve the problem of the flow rate of the valve, nor can it solve the harm of cavitation. Summary of the Utility Model

[0005] The utility model provides a flow regulating sleeve of a pressure reducing valve which can improve the flow rate of the valve and reduce cavitation.

[0006] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0007] Disclose a pressure reducing valve flow regulating sleeve, including a cylindrical sleeve arranged at the bottom of the pressure reducing valve plate. At least one circle of water inlet holes is arranged on the side wall of the cylindrical sleeve valve plate, and at least a pair of V-shaped grooves are also arranged on the side wall of the cylindrical sleeve; the water inlet holes on the same circle are symmetrically arranged. By arranging water inlet holes and V-shaped grooves on the cylindrical sleeve, the flow velocity of water entering the valve is greatly increased, thereby increasing the water flow rate inside the valve.

[0008] Preferably, three circles of water inlet holes are arranged on the cylindrical sleeve. By increasing the number of water inlet holes, the flow rate of the valve is further increased.

[0009] Preferably, the water inlet holes on adjacent circles are staggered.

[0010] Preferably, the water inlet holes on the same circle are arranged at intervals.

[0011] Preferably, four V-shaped grooves are arranged. With four V-shaped grooves, the external water flow flows in from the four V-shaped grooves, greatly increasing the flowing water area.

[0012] Preferably, the bottom of the V-shaped groove is set to be arc-shaped °.

[0013] Preferably, the diameter of the water inlet hole is φ3 - 11 mm.

[0014] Preferably, the cylindrical sleeve and the valve plate are connected by bolts.

[0015] Preferably, the material of the cylindrical sleeve is corrosion-resistant 304 material.

[0016] Preferably, the side wall of the V-shaped groove is arc-shaped.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] 1. By arranging V-shaped grooves and water inlet holes arranged in a circle on the cylindrical sleeve, compared with using simple round holes as water inlet holes, the flowing water area is greatly increased, and the flow rate of the valve is increased. At the same time, the water inlet holes on the same circle are symmetrically arranged. When the high-pressure external water flow enters from the water inlet holes, water also enters the symmetrically arranged water inlet holes. The two water flows collide in the cylindrical sleeve, thus avoiding the water flow impacting the inner wall of the cylindrical sleeve, thereby achieving the purpose of reducing cavitation. Ensure the safe operation of the pressure reducing valve under various working conditions, especially under high pressure difference and small flow rate conditions.

[0019] 2. By increasing the number of circles of water inlet holes, the hole diameter size, and the number of V-shaped grooves, the flowing water area is increased, and the flow rate of the valve is increased. Brief Description of the Drawings

[0020] Figure 1 It is a structural schematic diagram of a pressure reducing valve flow regulating sleeve of the present utility model;

[0021] Figure 2 This is a simulation comparison diagram of a pressure reducing valve flow regulating sleeve of the present utility model;

[0022] Figure 3 This is a schematic structural diagram of a structure with only a water inlet hole provided on the flow regulating sleeve. Specific embodiments

[0023] To clearly illustrate the technical features of this solution, the present utility model will be described in detail below through specific embodiments and in conjunction with its accompanying drawings.

[0024] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application may be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0025] In addition, in the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more, unless otherwise specifically defined.

[0026] In the present application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection, an electrical connection, or a communication; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0027] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] Embodiment 1

[0029] As Figure 1 shown, a pressure reducing valve flow regulating sleeve is disclosed, which includes a cylindrical sleeve 2 provided at the bottom of the valve plate 1 of the pressure reducing valve. At least one circle of water inlet holes 3 is provided on the side wall of the cylindrical sleeve 2 of the valve plate 1, and at least a pair of V-shaped grooves 4 are also provided on the side wall of the cylindrical sleeve 2; the water inlet holes 3 on the same circle are symmetrically arranged.

[0030] In this embodiment, by providing a cylindrical sleeve 2 at the bottom of the valve plate 1, the external water flow enters the valve through the water flow channel on the cylindrical sleeve 2. The water flow channel on the cylindrical sleeve 2 specifically includes the water inlet holes 3 arranged in a surrounding manner and the V-shaped grooves 4. The water inlet holes 3 are provided in a plurality, and the plurality of water inlet holes 3 are arranged in a surrounding manner on the side wall of the cylindrical sleeve 2, and finally a circle of water inlet holes 3 is formed on the side wall of the cylindrical sleeve 2. By increasing the V-shaped grooves 4, the water flow area is greatly increased, thereby increasing the flow rate of the water entering the valve, and finally increasing the flow rate of the valve.

[0031] Cavitation refers to the high-pressure water flow impacting the inner wall of the pipeline, where water vaporizes. After vaporization, many small bubbles mixed with steam and gas will be formed. When the bubbles flow from the low-pressure area to the high-pressure area along with the water flow, the bubbles burst under the action of high pressure, and the high-pressure water flows at an extremely high speed into the space originally occupied by these bubbles, forming an impact force. The metal surface is severely damaged due to fatigue under the action of the water hammer pressure, and finally the inner wall of the pipeline is broken. Therefore, in order to avoid cavitation of the inner wall of the cylindrical sleeve 2, the water inlet holes 3 on the same circle are symmetrically arranged. That is, when the water flow enters the cylindrical sleeve 2 from a certain water inlet hole 3, the water flow will also enter the symmetric water inlet hole 3. The two water flows just oppose each other, thereby consuming the kinetic energy of the water flow, avoiding cavitation of the inner wall of the cylindrical sleeve 2, and increasing the service life of the pressure reducing valve. At the same time, it also avoids the noise caused by the high-pressure water flow impacting the inner wall of the cylindrical sleeve 2, playing a noise reduction role. Ensure that the pressure reducing valve can operate safely under various working conditions, especially under high pressure difference and small flow rate conditions.

[0032] In this embodiment, the side wall of the V-shaped groove 4 can be set to be arc-shaped. The advantage of this design is that when the external water flows through the V-shaped groove 4 and into the valve, the flowing water is smoother and the noise is smaller.

[0033] The design of the water inlet 3 + V-shaped groove 4, by attaching Figure 2 It can be clearly seen that when the valve is gradually opened, compared with only having a water inlet hole, the flow rate of the valve in this embodiment is greatly improved.

[0034] Embodiment 2

[0035] Disclose a flow-regulating sleeve for a pressure-reducing valve, including a cylindrical sleeve 2 arranged at the bottom of the valve plate 1 of the pressure-reducing valve. At least one circle of water inlet holes 3 is arranged on the side wall of the cylindrical sleeve 2 of the valve plate 1, and at least a pair of V-shaped grooves 4 are also arranged on the side wall of the cylindrical sleeve 2; the water inlet holes 3 on the same circle are symmetrically arranged.

[0036] The difference between this embodiment and Embodiment 1 is that: specifically, four circles of water inlet holes 3 can be arranged on the cylindrical sleeve 2. By increasing the number of water inlet holes 3, the flowing water area for the external water to flow into the valve is increased, and the flowing water velocity of the valve is increased.

[0037] At the same time, the advantage of arranging the water inlet holes 3 at the upper end of the V-shaped groove 4 is that: when the valve is opened, the external water first flows into the valve body from the water inlet holes 3. Inside the valve, water first enters through the water inlet holes 3. As the valve is gradually opened, finally, the external water not only flows into the valve from the water inlet holes 3, but also flows into the valve from the V-shaped groove 4. Allowing a small amount of water to enter the valve first avoids a large amount of water directly entering the valve and causing water hammer.

[0038] Specifically, the water inlet holes 3 on the same circle are arranged at intervals.

[0039] In this embodiment, the number of V-shaped grooves 4 is set to four. Of course, the size of the V-shaped groove 4 is not limited to four, and it can also be six. The number of V-shaped grooves 4 is specifically selected according to the valve model.

[0040] Embodiment 3

[0041] Disclose a flow-regulating sleeve for a pressure-reducing valve, including a cylindrical sleeve 2 arranged at the bottom of the valve plate 1 of the pressure-reducing valve. At least one circle of water inlet holes 3 is arranged on the side wall of the cylindrical sleeve 2 of the valve plate 1, and at least a pair of V-shaped grooves 4 are also arranged on the side wall of the cylindrical sleeve 2; the water inlet holes 3 on the same circle are symmetrically arranged.

[0042] The difference between this embodiment and Embodiment 1 is that: the notch angle of the V-shaped groove 4 is specifically set to 120°.

[0043] The aperture diameter of the water inlet hole 3 is generally set to φ3 - 11 mm. The aperture diameter of the water inlet hole 3 is specifically determined according to the caliber of the pressure reducing valve. The aperture diameter of the water inlet hole for a DN100 caliber is 3 mm, the aperture diameter of the water inlet hole 3 for a DN150 caliber is 4 mm, and the aperture diameter of the water inlet hole 3 for a DN200 caliber is 5 mm. The appropriate hole size is calculated based on the required flow rate and simulation. DN100 means the through-hole diameter of the main pipe of the pressure reducing valve is 100 mm.

[0044] Embodiment 4

[0045] Disclose a flow-regulating sleeve of a pressure reducing valve, including a cylindrical sleeve 2 arranged at the bottom of the valve plate 1 of the pressure reducing valve. At least one circle of water inlet holes 3 is arranged on the side wall of the cylindrical sleeve 2 of the valve plate 1, and at least a pair of V-shaped grooves 4 are also arranged on the side wall of the cylindrical sleeve 2; the water inlet holes 3 on the same circle are symmetrically arranged.

[0046] The difference between this embodiment and Embodiment 1 is that: the cylindrical sleeve 2 and the valve plate 1 are integrally formed. Of course, the cylindrical sleeve 2 and the valve plate 1 can also be connected by bolts. The advantage of this design is: it is convenient for the installation and disassembly of the pressure reducing valve.

[0047] Embodiment 5

[0048] Disclose a flow-regulating sleeve of a pressure reducing valve, including a cylindrical sleeve 2 arranged at the bottom of the valve plate 1 of the pressure reducing valve. At least one circle of water inlet holes 3 is arranged on the side wall of the cylindrical sleeve 2 of the valve plate 1, and at least a pair of V-shaped grooves 4 are also arranged on the side wall of the cylindrical sleeve 2; the water inlet holes 3 on the same circle are symmetrically arranged.

[0049] In order to further improve the service life of the pressure reducing valve, a protective film against waterproof oxidation and corrosion can also be provided on the surface of the cylindrical sleeve 2, for example, spraying a layer of paint on the surface of the cylindrical sleeve 2.

[0050] It can also be that the material of the cylindrical sleeve adopts corrosion-resistant 304 material, so as to achieve the purpose of preventing rust and the like.

[0051] Obviously, the above-mentioned embodiments of the present invention are only examples clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A flow regulating sleeve of a pressure reducing valve, characterized in that: It comprises a cylindrical sleeve arranged at the bottom of the pressure reducing valve plate, wherein the side wall of the cylindrical sleeve valve plate is provided with at least one circle of water inlet holes, and the side wall of the cylindrical sleeve is also provided with at least one pair of V-shaped grooves; the water inlet holes on the same circle are symmetrically arranged.

2. A flow regulating sleeve of a pressure reducing valve according to claim 1, characterized in that: The cylindrical sleeve is provided with three circles of water inlet holes.

3. A flow regulating sleeve of a pressure reducing valve according to claim 2, characterized in that: The water inlet holes on adjacent circles are staggered.

4. A flow regulating sleeve for a pressure reducing valve according to claim 1, characterized in that: The water inlet holes on the same circle are arranged at intervals.

5. A flow regulating sleeve for a pressure reducing valve according to claim 1, characterized in that: The number of the V-shaped grooves is four.

6. A flow regulating sleeve of a pressure reducing valve according to claim 1, characterized in that: The bottom of the V-shaped groove is configured to be arc-shaped.

7. A flow regulating sleeve of a pressure reducing valve according to claim 1, characterized in that: The diameter of the water inlet hole is φ3-11 mm.

8. The flow regulating sleeve of a pressure reducing valve according to claim 1, characterized in that: The cylindrical sleeve is connected to the valve plate via bolts.

9. A flow regulating sleeve of a pressure reducing valve according to claim 1, characterized in that: The cylindrical sleeve is made of corrosion-resistant 304 material.

10. The flow regulating sleeve of a pressure reducing valve according to claim 1, characterized in that: The side wall of the V-shaped groove is arc-shaped.

Images