Labyrinth pressure reducing anti-cavitation high pressure regulating valve
By installing labyrinth-type throttling plates and packing pressure plates inside the high-pressure regulating valve, the problem of complex structure in the high-pressure regulating valve during pressure reduction and cavitation prevention is solved, achieving stable pressure reduction and sealing, and extending the equipment life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING NANPING AUTOMATION INSTR FACTORY CO LTD
- Filing Date
- 2025-08-20
- Publication Date
- 2026-07-31
AI Technical Summary
Existing high-pressure regulating valves have complex structures during pressure reduction and cavitation prevention, which leads to severe cavitation of the medium inside the valve, causing vibration, noise, and component erosion and wear, thus shortening the service life of the equipment.
The labyrinth-type pressure reducing and anti-cavitation high-pressure regulating valve uses multiple sets of throttling plates in the valve body to form a tortuous flow channel, reducing pressure in stages to avoid cavitation. Combined with packing pressure plates and sealing mechanisms, it ensures stable medium flow and sealing, reducing cavitation and noise.
It achieves stable pressure reduction of high-pressure media, reduces vibration and noise caused by cavitation, improves valve sealing and regulation accuracy, and extends equipment service life.
Smart Images
Figure CN224579855U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of valve technology, and in particular to a labyrinth-type pressure reducing and anti-cavitation high-pressure regulating valve. Background Technology
[0002] Anti-cavitation high-pressure regulating valves are valves that can accurately regulate fluid pressure and flow rate under high pressure differential conditions and effectively suppress cavitation. Labyrinth-type pressure reduction utilizes multiple sets of throttling plates within the valve to form a tortuous flow path, allowing the high-pressure fluid to gradually decrease in pressure through multiple stages of throttling. Anti-cavitation high-pressure regulating valves employ labyrinth-type pressure reduction because single-stage throttling easily leads to a sudden pressure drop and cavitation. The labyrinth structure disperses the total pressure differential across multiple throttling units, controlling the pressure drop at each stage below the cavitation critical value. This achieves stable pressure reduction of the high-pressure fluid while preventing cavitation damage to components such as the valve core and seat, extending valve life and ensuring regulating accuracy.
[0003] The labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve has a relatively complex structure, mainly composed of the valve body, valve cover, valve internals, valve stem, and packing. The valve body is the main body of the regulating valve, used to contain the medium and provide a flow passage. Its material and wall thickness are selected according to different pressure ratings and operating conditions, such as forged steel or cast steel. The valve cover is used to seal the valve body and is tightly connected to it.
[0004] In existing technologies, some high-pressure regulating valves have complex structures and poor performance in the process of reducing pressure and preventing cavitation. This can lead to severe cavitation of the medium inside the valve, causing valve vibration and noise, aggravating erosion and wear of components such as valve core and valve seat, and shortening the service life of the equipment. To address these issues, a labyrinth-type pressure reducing and cavitation-preventing high-pressure regulating valve is proposed. Utility Model Content
[0005] To overcome the above shortcomings, this utility model provides a labyrinth-type pressure reducing and anti-cavitation high-pressure regulating valve, which aims to improve the problem that the existing high-pressure regulating valve has a complex structure and poor performance in the process of achieving pressure reduction and anti-cavitation. This results in severe cavitation of the medium in the valve, causing valve vibration and noise, aggravating the erosion and wear of components such as valve core and valve seat, and shortening the service life of the equipment.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A labyrinth-type pressure reducing and anti-cavitation high-pressure regulating valve includes a valve body, a packing pressure plate threadedly connected to the top of the valve body, a drive mechanism slidably connected inside the valve body, and a sealing mechanism fixedly connected to the bottom of the valve body.
[0008] The drive mechanism includes a valve stem, which is externally slidably connected to the inside of the valve body. A packing gland is slidably connected to the inside of the valve body. A valve core is fixedly connected to the bottom of the valve stem. A bushing is slidably connected to the outside of the valve core. A labyrinth valve seat is fixedly connected to the inside of the valve body. Multiple throttling plates are fixedly connected to the inside of the labyrinth valve seat. A packing compression assembly for packing is fixedly connected to the inside of the packing gland.
[0009] As a further description of the above technical solution:
[0010] The sealing mechanism includes a lens housing, the top of which is fixedly connected to the bottom of the valve body, a lens pad is fixedly connected inside the lens housing, a lower valve body is fixedly connected to the bottom of the lens housing, a fixing block two is fixedly connected to the top of the lower valve body, and a flow pipe is fixedly connected to the bottom of the lower valve body.
[0011] As a further description of the above technical solution:
[0012] The pressing assembly includes an O-ring, the outside of which is fixedly connected to the inside of the packing gland, an upper packing gasket is fixedly connected to the inside of the packing gland, a plurality of packing ports are opened inside the packing gland, and a lower packing gasket is fixedly connected to the inside of the packing gland.
[0013] As a further description of the above technical solution:
[0014] An actuator is fixedly connected to the top of the packing plate, and the valve core is externally slidably connected to the inside of the labyrinth valve seat.
[0015] As a further description of the above technical solution:
[0016] The bottom of the valve core contacts the top of the throttling plate, and the far sides of the two bushings are fixedly connected to the inner wall of the valve body.
[0017] As a further description of the above technical solution:
[0018] The top of the second fixing block is fixedly connected to the bottom of the valve body, and the top of the lens pad is fixedly connected to the bottom of the valve body.
[0019] As a further description of the above technical solution:
[0020] A flow pipe is fixedly connected to the bottom of the lower valve body, and the top of the lower valve body is threadedly connected to the bottom of the valve body component.
[0021] As a further description of the above technical solution:
[0022] The valve stem is externally slidably connected to the inner wall of the packing plate, and the bottom of the packing plate is in contact with the top of the packing gland.
[0023] This utility model has the following beneficial effects:
[0024] 1. In this utility model, the packing gland is first covered with a packing pressure plate, and then the valve stem is moved to allow the medium to enter the throttling plate under the action of the valve stem. With different distribution of throttling plates, the pressure of the medium is continuously reduced, thereby reducing the generation of cavitation. In addition, the vibration and noise caused by cavitation are reduced, thus ensuring the stable operation of the module.
[0025] 2. In this utility model, the lower valve body moves so that the lens housing inserts the lens pad into the housing, thereby allowing the fixing block two to enter the valve body component, which then connects the valve body component and the lower valve body by threads, ensuring a stable seal between the lower valve body and the valve component. In addition, it can avoid energy waste and safety hazards caused by high pressure medium leakage, thereby ensuring valve adjustment accuracy and ensuring reliable module pressure control. Attached Figure Description
[0026] Figure 1 This is a three-dimensional schematic diagram of a labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve proposed in this utility model.
[0027] Figure 2 This is a schematic diagram of the structure of a labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve proposed in this utility model;
[0028] Figure 3 This is a schematic diagram of the structure of a labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve proposed in this utility model;
[0029] Figure 4 This is a schematic diagram of the structure of a labyrinth-type pressure reducing and anti-cavitation high-pressure regulating valve proposed in this utility model.
[0030] Legend:
[0031] 1. Valve body; 2. Packing gland; 3. Drive mechanism; 31. Valve stem; 32. Packing gland; 33. Labyrinth seat; 34. Bushing; 35. Throttling plate; 36. Valve core; 4. Pressing assembly; 41. O-ring; 42. Upper packing gasket; 43. Packing port; 44. Lower packing gasket; 5. Sealing mechanism; 51. Lens housing; 52. Lens gasket; 53. Fixing block two; 54. Lower valve body; 55. Flow pipe; 6. Actuator. Detailed Implementation
[0032] 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.
[0033] Reference Figure 2 and Figure 3 This utility model provides an embodiment of a labyrinth-type pressure reducing and anti-cavitation high-pressure regulating valve, including a valve body 1. The valve body 1 serves as the basic load-bearing structure of the entire valve, integrating and fixing all internal components to form a fluid flow channel frame. A packing pressure plate 2 is threadedly connected to the top of the valve body 1. The packing pressure plate 2 fixes the packing by applying pressure, ensuring a seal between the valve stem 31 and the valve body, preventing medium leakage from the gap. A drive mechanism 3 is slidably connected inside the valve body 1. The drive mechanism 3 is the operating force of the components, thereby enabling operation. A sealing mechanism 5 is fixedly connected to the bottom of the valve body 1. The sealing mechanism 5 achieves a sealed connection between the valve and the pipeline module, preventing medium leakage from the connection between the bottom of the valve body and the pipeline. The drive mechanism 3 includes a valve stem 31, which is externally slidably connected inside the valve body 1. The valve stem 31 transmits external driving force.
[0034] The valve body 1 has a sliding connection to a packing gland 32, which transmits the pressure of the packing pressure plate 2 to the packing and provides sliding guidance for the valve stem 31. The bottom of the valve stem 31 is fixedly connected to a valve core 36. The valve core 36 changes the flow area of the throttling channel by changing its relative position with the labyrinth valve seat 33, thereby achieving pressure reduction and flow control. The valve core 36 is externally slidably connected to a bushing 34, which provides guidance and protection for the valve core 36, reducing direct friction between the valve core 36 and the valve body and media scouring. The valve body 1 has a fixed connection to a labyrinth valve seat 33, which forms a multi-stage throttling channel. It eliminates cavitation through step-by-step pressure reduction, thereby achieving stable pressure reduction of the high-pressure medium. The labyrinth valve seat 33 has multiple throttling plates 35, which are key units in the formation of the labyrinth flow channel, achieving graded pressure reduction and anti-cavitation. The packing gland 32 has a fixed connection to a packing pressing assembly 4.
[0035] Reference Figure 2 and Figure 4The sealing mechanism 5 includes a lens housing 51, which serves as an intermediate load-bearing component, connecting the valve body 1 and the lower valve body 54. It also provides installation space for the lens pad 52 and acts as a pressure transmission carrier. The top of the lens housing 51 is fixedly connected to the bottom of the valve body 1. The lens pad 52 is fixedly connected inside the lens housing 51. The lens pad 52 utilizes its special shape and material properties to achieve a high-pressure seal between the lens housing 51 and the lower valve body 54, making it the core sealing element of the sealing mechanism 5. The bottom of the lens housing 51 is fixedly connected to the lower valve body 54. The lower valve body 54 is connected to... The lens housing 51 and the flow pipe 55 are connected to form the lower bearing structure of the sealing mechanism 5, and at the same time provide an installation reference for the fixing block 53 and the flow pipe 55. The top of the lower valve body 54 is fixedly connected to the fixing block 53. The fixing block 53 enhances the connection strength and stability between the lower valve body 54 and the lens housing 51, and prevents the connection structure from loosening under high pressure, which would lead to sealing failure. The bottom of the lower valve body 54 is fixedly connected to the flow pipe 55. The flow pipe 55 serves as the downstream outlet channel of the sealing mechanism 5, which transports the medium after valve regulation to the downstream pipeline module, and at the same time participates in the formation of the bottom sealing boundary.
[0036] Reference Figures 1 to 3 The pressure assembly 4 includes an O-ring 41, which is externally and fixedly connected to the inside of the packing gland 32. The O-ring 41 provides auxiliary sealing inside the packing gland 32, preventing media leakage from the gap between the packing gland 32 and the valve stem 31 or valve body 1. It is a secondary sealing element of the pressure assembly 4. An upper packing gasket 42 is fixedly connected inside the packing gland 32. The upper packing gasket 42 positions and protects the packing, evenly transmitting the pressure of the packing pressure plate 2 to ensure the packing tightly fits the valve stem 31 for sealing. Multiple packing ports 43 are provided inside the packing gland 32, serving as packing insertion channels for easy installation, replacement, and replenishment of the packing, and acting as maintenance interfaces for the pressure assembly 4. A lower packing gasket 44 is fixedly connected inside the packing gland 32, located below the packing gland 32, with its top contacting the packing and its bottom contacting the inner wall of the valve body 1. Its function is to support the packing and prevent it from moving downwards under the action of high pressure medium. At the same time, it works with the upper liner to limit the upper and lower positions of the packing and ensure the stable filling of the packing in the gland.
[0037] An actuator 6 is fixedly connected to the top of the packing plate 2. The actuator 6 drives the valve stem 31 and valve core 36 to move, realizing the opening, closing, or flow regulation of the valve. It is the power control component of the valve. The valve core 36 is externally slidably connected to the inside of the labyrinth valve seat 33. The valve core 36 receives the moving force of the valve stem 31 and thus moves. The bottom of the valve core 36 contacts the top of the throttling plate 35. The valve core 36 transfers the medium to the throttling plate 35 and moves under the action of the throttling plate 35. The far sides of the two bushings 34 are fixedly connected to the inner wall of the valve body 1. The pressure assembly 4 slows down the movement of the valve stem 31. The top of the fixing block 2 53 is fixedly connected to the bottom of the valve body 1. Block 2 53 ensures stable contact between valve body 1 and lower valve body 54. The top of lens pad 52 is fixedly connected to the bottom of valve body 1, and the lens pad 52 is fixedly attached to the bottom of valve body 1, contacting the lens housing 51. A flow pipe 55 is fixedly connected to the bottom of lower valve body 54, allowing the medium to flow out of valve body 1. The top of lower valve body 54 is threadedly connected to the bottom of valve body 1, and lower valve body 54 and valve body 1 are finally threadedly connected. The valve stem 31 is externally slidably connected to the inner wall of packing plate 2, and the valve stem 31 receives the drive to move. The bottom of packing plate 2 contacts the top of packing gland 32, and the packing plate 2 receives the pressure of packing gland 32 to move.
[0038] Working principle: First, the operator presses the packing pressure plate 2 against the packing gland 32 to stabilize the medium. The actuator 6 moves, causing the valve stem 31 to move, allowing the bottom valve core 36 to enter the labyrinth valve seat 33. This allows the medium to flow continuously under the action of the throttling plate 35, which continuously reduces the pressure of the medium. With the help of the packing components, including the lower packing liner 44, the packing, the upper packing liner 42, the O-ring 41, the packing gland 32, and the packing pressure plate 2, the medium is prevented from leaking out. In addition, it reduces vibration and noise caused by cavitation, thus ensuring stable operation of the module.
[0039] Then, the operator moves the lower valve body 54 toward the valve body component 1, so that the lens pad 52 at the bottom of the valve body component 1 enters the lens housing 51, sealing the lens pad 52 with the lens housing 51, and allowing the fixing block 2 53 to enter the bottom of the valve body component 1, so that the two valve body components 1 and the lower valve body 54 come into contact. The operator then uses a high-pressure stud to connect the lower valve body 54 and the valve body component 1, making the seal more stable. In addition, it can avoid energy waste and safety hazards caused by high-pressure medium leakage, thereby ensuring the valve adjustment accuracy and ensuring reliable module pressure control.
[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve, comprising a valve body (1), characterized in that: The top of the valve body (1) is threadedly connected to a packing pressure plate (2), the inside of the valve body (1) is slidably connected to a drive mechanism (3), and the bottom of the valve body (1) is fixedly connected to a sealing mechanism (5). The drive mechanism (3) includes a valve stem (31), which is externally slidably connected to the inside of the valve body (1). A packing gland (32) is slidably connected inside the valve body (1). A valve core (36) is fixedly connected to the bottom of the valve stem (31). A bushing (34) is slidably connected to the outside of the valve core (36). A labyrinth valve seat (33) is fixedly connected inside the valve body (1). Multiple throttling plates (35) are fixedly connected inside the labyrinth valve seat (33). A packing pressure assembly (4) for packing is fixedly connected inside the packing gland (32).
2. The labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve according to claim 1, characterized in that: The sealing mechanism (5) includes a lens housing (51), the top of which is fixedly connected to the bottom of the valve body (1). A lens pad (52) is fixedly connected inside the lens housing (51), and a lower valve body (54) is fixedly connected to the bottom of the lens housing (51). A fixing block two (53) is fixedly connected to the top of the lower valve body (54), and a flow pipe (55) is fixedly connected to the bottom of the lower valve body (54).
3. The labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve according to claim 1, characterized in that: The pressing assembly (4) includes an O-ring (41), the outside of which is fixedly connected to the inside of the packing gland (32). The inside of the packing gland (32) is fixedly connected to an upper packing gasket (42). The inside of the packing gland (32) is provided with multiple packing ports (43). The inside of the packing gland (32) is fixedly connected to a lower packing gasket (44).
4. The labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve according to claim 1, characterized in that: An actuator (6) is fixedly connected to the top of the packing plate (2), and the valve core (36) is externally slidably connected to the inside of the labyrinth valve seat (33).
5. A labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve according to claim 1, characterized in that: The bottom of the valve core (36) is in contact with the top of the throttling plate (35), and the two bushings (34) are fixedly connected to the inner wall of the valve body (1) on opposite sides.
6. A labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve according to claim 2, characterized in that: The top of the fixing block 2 (53) is fixedly connected to the bottom of the valve body (1), and the top of the lens pad (52) is fixedly connected to the bottom of the valve body (1).
7. A labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve according to claim 2, characterized in that: The bottom of the lower valve body (54) is fixedly connected to a flow pipe (55), and the top of the lower valve body (54) is threadedly connected to the bottom of the valve body component (1).
8. A labyrinth-type pressure-reducing and anti-cavitation high-pressure regulating valve according to claim 1, characterized in that: The valve stem (31) is externally slidably connected to the inner wall of the packing plate (2), and the bottom of the packing plate (2) is in contact with the top of the packing cap (32).